gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright (C) 1997-2017 Free Software Foundation, Inc.
   5
   6 #This file is part of GCC.
   7
   8 #GCC is free software; you can redistribute it and/or modify it under
   9 #the terms of the GNU General Public License as published by the Free
  10 #Software Foundation; either version 3, or (at your option) any later
  11 #version.
  12
  13 #GCC is distributed in the hope that it will be useful, but WITHOUT
  14 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 #for more details.
  17
  18 #You should have received a copy of the GNU General Public License
  19 #along with GCC; see the file COPYING3.  If not see
  20 #<http://www.gnu.org/licenses/>.
  21
  22 # --------------------------------
  23 # Initialization and sanity checks
  24 # --------------------------------
  25
  26 AC_PREREQ(2.64)
  27 AC_INIT
  28 AC_CONFIG_SRCDIR(tree.c)
  29 AC_CONFIG_HEADER(auto-host.h:config.in)
  30
  31 gcc_version=`cat $srcdir/BASE-VER`
  32
  33 # Determine the host, build, and target systems
  34 AC_CANONICAL_BUILD
  35 AC_CANONICAL_HOST
  36 AC_CANONICAL_TARGET
  37
  38 # Determine the noncanonical host name, for Ada.
  39 ACX_NONCANONICAL_HOST
  40
  41 # Determine the noncanonical target name, for directory use.
  42 ACX_NONCANONICAL_TARGET
  43
  44 # Used for constructing correct paths for offload compilers.
  45 real_target_noncanonical=${target_noncanonical}
  46 accel_dir_suffix=
  47
  48 # Determine the target- and build-specific subdirectories
  49 GCC_TOPLEV_SUBDIRS
  50
  51 # Set program_transform_name
  52 AC_ARG_PROGRAM
  53
  54 # Check for bogus environment variables.
  55 # Test if LIBRARY_PATH contains the notation for the current directory
  56 # since this would lead to problems installing/building glibc.
  57 # LIBRARY_PATH contains the current directory if one of the following
  58 # is true:
  59 # - one of the terminals (":" and ";") is the first or last sign
  60 # - two terminals occur directly after each other
  61 # - the path contains an element with a dot in it
  62 AC_MSG_CHECKING(LIBRARY_PATH variable)
  63 changequote(,)dnl
  64 case ${LIBRARY_PATH} in
  65   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  66     library_path_setting="contains current directory"
  67     ;;
  68   *)
  69     library_path_setting="ok"
  70     ;;
  71 esac
  72 changequote([,])dnl
  73 AC_MSG_RESULT($library_path_setting)
  74 if test "$library_path_setting" != "ok"; then
  75 AC_MSG_ERROR([
  76 *** LIBRARY_PATH shouldn't contain the current directory when
  77 *** building gcc. Please change the environment variable
  78 *** and run configure again.])
  79 fi
  80
  81 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  82 # since this would lead to problems installing/building glibc.
  83 # GCC_EXEC_PREFIX contains the current directory if one of the following
  84 # is true:
  85 # - one of the terminals (":" and ";") is the first or last sign
  86 # - two terminals occur directly after each other
  87 # - the path contains an element with a dot in it
  88 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  89 changequote(,)dnl
  90 case ${GCC_EXEC_PREFIX} in
  91   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  92     gcc_exec_prefix_setting="contains current directory"
  93     ;;
  94   *)
  95     gcc_exec_prefix_setting="ok"
  96     ;;
  97 esac
  98 changequote([,])dnl
  99 AC_MSG_RESULT($gcc_exec_prefix_setting)
 100 if test "$gcc_exec_prefix_setting" != "ok"; then
 101 AC_MSG_ERROR([
 102 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
 103 *** building gcc. Please change the environment variable
 104 *** and run configure again.])
 105 fi
 106
 107 # -----------
 108 # Directories
 109 # -----------
 110
 111 # Specify the local prefix
 112 local_prefix=
 113 AC_ARG_WITH(local-prefix,
 114 [AS_HELP_STRING([--with-local-prefix=DIR],
 115                 [specifies directory to put local include])],
 116 [case "${withval}" in
 117 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 118 no)     ;;
 119 *)      local_prefix=$with_local_prefix ;;
 120 esac])
 121
 122 # Default local prefix if it is empty
 123 if test x$local_prefix = x; then
 124         local_prefix=/usr/local
 125 fi
 126
 127 AC_ARG_WITH([native-system-header-dir],
 128   [  --with-native-system-header-dir=dir
 129                           use dir as the directory to look for standard
 130                           system header files in.  Defaults to /usr/include.],
 131 [
 132  case ${with_native_system_header_dir} in
 133  yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
 134  /* | [[A-Za-z]]:[[\\/]]*) ;;
 135  *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
 136  esac
 137  configured_native_system_header_dir="${withval}"
 138 ], [configured_native_system_header_dir=])
 139
 140 AC_ARG_WITH(build-sysroot,
 141   [AS_HELP_STRING([--with-build-sysroot=sysroot],
 142                   [use sysroot as the system root during the build])],
 143   [if test x"$withval" != x ; then
 144      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
 145    fi],
 146   [SYSROOT_CFLAGS_FOR_TARGET=])
 147 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
 148
 149 if test "x$prefix" = xNONE; then
 150  test_prefix=/usr/local
 151 else
 152  test_prefix=$prefix
 153 fi
 154 if test "x$exec_prefix" = xNONE; then
 155  test_exec_prefix=$test_prefix
 156 else
 157  test_exec_prefix=$exec_prefix
 158 fi
 159
 160 AC_ARG_WITH(sysroot,
 161 [AS_HELP_STRING([[--with-sysroot[=DIR]]],
 162                 [search for usr/lib, usr/include, et al, within DIR])],
 163 [
 164  case ${with_sysroot} in
 165  /) ;;
 166  */) with_sysroot=`echo $with_sysroot | sed 's,/$,,'` ;;
 167  esac
 168  case ${with_sysroot} in
 169  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 170  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 171  esac
 172
 173  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 174  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 175
 176  case ${TARGET_SYSTEM_ROOT} in
 177  "${test_prefix}"|"${test_prefix}/"*|\
 178  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 179  '${prefix}'|'${prefix}/'*|\
 180  '${exec_prefix}'|'${exec_prefix}/'*)
 181    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 182    TARGET_SYSTEM_ROOT_DEFINE="$t"
 183    ;;
 184  esac
 185 ], [
 186  TARGET_SYSTEM_ROOT=
 187  TARGET_SYSTEM_ROOT_DEFINE=
 188  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 189 ])
 190 AC_SUBST(TARGET_SYSTEM_ROOT)
 191 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 192 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 193
 194 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 195 # passed in by the toplevel make and thus we'd get different behavior
 196 # depending on where we built the sources.
 197 gcc_gxx_include_dir=
 198 # Specify the g++ header file directory
 199 AC_ARG_WITH(gxx-include-dir,
 200 [AS_HELP_STRING([--with-gxx-include-dir=DIR],
 201                 [specifies directory to put g++ header files])],
 202 [case "${withval}" in
 203 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 204 no)     ;;
 205 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 206 esac])
 207
 208 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 209 if test x${gcc_gxx_include_dir} = x; then
 210   if test x${enable_version_specific_runtime_libs} = xyes; then
 211     gcc_gxx_include_dir='${libsubdir}/include/c++'
 212   else
 213     libstdcxx_incdir='include/c++/$(version)'
 214     if test x$host != x$target; then
 215        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 216     fi
 217     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 218   fi
 219 fi
 220
 221 gcc_gxx_include_dir_add_sysroot=0
 222 if test "${with_sysroot+set}" = set; then
 223   gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 224   if test "${gcc_gxx_without_sysroot}"; then
 225     if test x${with_sysroot} != x/; then
 226       gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
 227     fi
 228     gcc_gxx_include_dir_add_sysroot=1
 229   fi
 230 fi
 231
 232 AC_ARG_WITH(cpp_install_dir,
 233 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
 234                 [install the user visible C preprocessor in DIR
 235                  (relative to PREFIX) as well as PREFIX/bin])],
 236 [if test x$withval = xyes; then
 237   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 238 elif test x$withval != xno; then
 239   cpp_install_dir=$withval
 240 fi])
 241
 242 # We would like to our source tree to be readonly.  However when releases or
 243 # pre-releases are generated, the flex/bison generated files as well as the
 244 # various formats of manuals need to be included along with the rest of the
 245 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 246 # just that.
 247
 248 AC_MSG_CHECKING([whether to place generated files in the source directory])
 249   dnl generated-files-in-srcdir is disabled by default
 250   AC_ARG_ENABLE(generated-files-in-srcdir,
 251     [AS_HELP_STRING([--enable-generated-files-in-srcdir],
 252                     [put copies of generated files in source dir
 253                      intended for creating source tarballs for users
 254                      without texinfo bison or flex])],
 255       generated_files_in_srcdir=$enableval,
 256       generated_files_in_srcdir=no)
 257
 258 AC_MSG_RESULT($generated_files_in_srcdir)
 259
 260 if test "$generated_files_in_srcdir" = "yes"; then
 261   GENINSRC=''
 262 else
 263   GENINSRC='#'
 264 fi
 265 AC_SUBST(GENINSRC)
 266
 267 # -------------------
 268 # Find default linker
 269 # -------------------
 270
 271 # With GNU ld
 272 AC_ARG_WITH(gnu-ld,
 273 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
 274 gnu_ld_flag="$with_gnu_ld",
 275 gnu_ld_flag=no)
 276
 277 case $target in
 278     *darwin*) ld64_flag=yes;; # Darwin can only use a ld64-compatible linker.
 279     *) ld64_flag=no;;
 280 esac
 281
 282 # With pre-defined ld
 283 AC_ARG_WITH(ld,
 284 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
 285 DEFAULT_LINKER="$with_ld")
 286 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 287   if test ! -x "$DEFAULT_LINKER"; then
 288     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 289   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 290     gnu_ld_flag=yes
 291   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep ld64- > /dev/null; then
 292     ld64_flag=yes
 293   fi
 294   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 295         [Define to enable the use of a default linker.])
 296 fi
 297
 298 AC_MSG_CHECKING([whether a default linker was specified])
 299 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 300   if test x"$gnu_ld_flag" = x"no"; then
 301     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 302   else
 303     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 304   fi
 305 else
 306   AC_MSG_RESULT(no)
 307 fi
 308
 309 # With demangler in GNU ld
 310 AC_ARG_WITH(demangler-in-ld,
 311 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
 312 demangler_in_ld="$with_demangler_in_ld",
 313 demangler_in_ld=yes)
 314
 315 # ----------------------
 316 # Find default assembler
 317 # ----------------------
 318
 319 # With GNU as
 320 AC_ARG_WITH(gnu-as,
 321 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
 322 gas_flag="$with_gnu_as",
 323 gas_flag=no)
 324
 325 AC_ARG_WITH(as,
 326 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
 327 DEFAULT_ASSEMBLER="$with_as")
 328 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 329   if test ! -x "$DEFAULT_ASSEMBLER"; then
 330     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 331   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 332     gas_flag=yes
 333   fi
 334   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 335         [Define to enable the use of a default assembler.])
 336 fi
 337
 338 AC_MSG_CHECKING([whether a default assembler was specified])
 339 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 340   if test x"$gas_flag" = x"no"; then
 341     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 342   else
 343     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 344   fi
 345 else
 346   AC_MSG_RESULT(no)
 347 fi
 348
 349 # ---------------
 350 # Find C compiler
 351 # ---------------
 352
 353 # If a non-executable a.out is present (e.g. created by GNU as above even if
 354 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 355 # file, even when creating an executable, so an execution test fails.
 356 # Remove possible default executable files to avoid this.
 357 #
 358 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 359 # Autoconf includes it.
 360 rm -f a.out a.exe b.out
 361
 362 # Find the native compiler
 363 AC_PROG_CC
 364 AC_PROG_CXX
 365 ACX_PROG_GNAT([-I"$srcdir"/ada/libgnat])
 366
 367 # Do configure tests with the C++ compiler, since that's what we build with.
 368 AC_LANG(C++)
 369
 370 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 371 # optimizations to be activated explicitly by the toplevel.
 372 case "$CC" in
 373   */prev-gcc/xgcc*) ;;
 374   *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[       ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" `
 375      CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[   ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" ` ;;
 376 esac
 377 AC_SUBST(CFLAGS)
 378 AC_SUBST(CXXFLAGS)
 379
 380 # Determine PICFLAG for target gnatlib.
 381 GCC_PICFLAG_FOR_TARGET
 382 AC_SUBST(PICFLAG_FOR_TARGET)
 383
 384 # -------------------------
 385 # Check C compiler features
 386 # -------------------------
 387
 388 AC_USE_SYSTEM_EXTENSIONS
 389 AC_PROG_CPP
 390 AC_C_INLINE
 391
 392 AC_SYS_LARGEFILE
 393
 394 # sizeof(char) is 1 by definition.
 395 AC_CHECK_SIZEOF(void *)
 396 AC_CHECK_SIZEOF(short)
 397 AC_CHECK_SIZEOF(int)
 398 AC_CHECK_SIZEOF(long)
 399 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 400 GCC_STDINT_TYPES
 401 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
 402   AC_MSG_ERROR([uint64_t or int64_t not found])
 403 fi
 404
 405 # check what underlying integer type int64_t uses
 406 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
 407 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 408 #ifdef HAVE_STDINT_H
 409 #include <stdint.h>
 410 #endif
 411 template <typename T> struct X { };
 412 template <>
 413 struct X<long> { typedef long t; };
 414 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
 415 if test "$ac_cv_int64_t_type" = "long"; then
 416   AC_DEFINE(INT64_T_IS_LONG, 1,
 417   [Define if int64_t uses long as underlying type.])
 418 else
 419 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 420 #ifdef HAVE_STDINT_H
 421 #include <stdint.h>
 422 #endif
 423 template <typename T> struct X { };
 424 template <>
 425 struct X<long long> { typedef long long t; };
 426 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
 427 fi
 428
 429 AC_CACHE_CHECK(for std::swap in <utility>, ac_cv_std_swap_in_utility, [
 430 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 431 #include <utility>
 432 ]], [[int a, b; std::swap(a,b);]])],[ac_cv_std_swap_in_utility=yes],[ac_cv_std_swap_in_utility=no])])
 433 if test $ac_cv_std_swap_in_utility = yes; then
 434   AC_DEFINE(HAVE_SWAP_IN_UTILITY, 1,
 435   [Define if <utility> defines std::swap.])
 436 fi
 437
 438 # Check whether compiler is affected by placement new aliasing bug (PR 29286).
 439 # If the host compiler is affected by the bug, and we build with optimization
 440 # enabled (which happens e.g. when cross-compiling), the pool allocator may
 441 # get miscompiled.  Use -fno-strict-aliasing to work around this problem.
 442 # Since there is no reliable feature check for the presence of this bug,
 443 # we simply use a GCC version number check.  (This should never trigger for
 444 # stages 2 or 3 of a native bootstrap.)
 445 aliasing_flags=
 446 if test "$GCC" = yes; then
 447   saved_CXXFLAGS="$CXXFLAGS"
 448
 449   # The following test compilation will succeed if and only if $CXX accepts
 450   # -fno-strict-aliasing *and* is older than GCC 4.3.
 451   CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
 452   AC_MSG_CHECKING([whether $CXX is affected by placement new aliasing bug])
 453   AC_COMPILE_IFELSE([
 454 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
 455 #error compiler not affected by placement new aliasing bug
 456 #endif
 457 ],
 458     [AC_MSG_RESULT([yes]); aliasing_flags='-fno-strict-aliasing'],
 459     [AC_MSG_RESULT([no])])
 460
 461   CXXFLAGS="$saved_CXXFLAGS"
 462 fi
 463 AC_SUBST(aliasing_flags)
 464
 465
 466
 467 # ---------------------
 468 # Warnings and checking
 469 # ---------------------
 470
 471 # Check $CC warning features (if it's GCC).
 472 # We want to use -pedantic, but we don't want warnings about
 473 # * 'long long'
 474 # * variadic macros
 475 # * overlong strings
 476 # * C++11 narrowing conversions in { }
 477 # So, we only use -pedantic if we can disable those warnings.
 478
 479 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
 480 AC_ARG_ENABLE(build-format-warnings,
 481   AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
 482   [],[enable_build_format_warnings=yes])
 483 AS_IF([test $enable_build_format_warnings = no],
 484       [wf_opt=-Wno-format],[wf_opt=])
 485 ACX_PROG_CXX_WARNING_OPTS(
 486         m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings ],
 487                        [-Wcast-qual $wf_opt])), [loose_warn])
 488 ACX_PROG_CC_WARNING_OPTS(
 489         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 490         [c_loose_warn])
 491 ACX_PROG_CXX_WARNING_OPTS(
 492         m4_quote(m4_do([-Wmissing-format-attribute ],
 493                        [-Woverloaded-virtual])), [strict_warn])
 494 ACX_PROG_CC_WARNING_OPTS(
 495         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 496 ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(
 497         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 498                        [-Wno-overlength-strings])), [strict_warn])
 499 ACX_PROG_CXX_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 500
 501 # The above macros do nothing if the compiler is not GCC.  However, the
 502 # Makefile has more goo to add other flags, so these variables are used
 503 # to enable warnings only for GCC.
 504 warn_cflags=
 505 warn_cxxflags=
 506 if test "x$GCC" = "xyes"; then
 507   warn_cflags='$(GCC_WARN_CFLAGS)'
 508   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 509 fi
 510 AC_SUBST(warn_cflags)
 511 AC_SUBST(warn_cxxflags)
 512
 513 # Disable exceptions and RTTI if building with g++
 514 ACX_PROG_CC_WARNING_OPTS(
 515         m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
 516                        [noexception_flags])
 517
 518 # Enable expensive internal checks
 519 is_release=
 520 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 521   is_release=yes
 522 fi
 523
 524 AC_ARG_ENABLE(checking,
 525 [AS_HELP_STRING([[--enable-checking[=LIST]]],
 526                 [enable expensive run-time checks.  With LIST,
 527                  enable only specific categories of checks.
 528                  Categories are: yes,no,all,none,release.
 529                  Flags are: assert,df,extra,fold,gc,gcac,gimple,misc,
 530                  rtlflag,rtl,runtime,tree,valgrind,types])],
 531 [ac_checking_flags="${enableval}"],[
 532 # Determine the default checks.
 533 if test x$is_release = x ; then
 534   ac_checking_flags=yes,extra
 535 else
 536   ac_checking_flags=release
 537 fi])
 538 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 539 for check in release $ac_checking_flags
 540 do
 541         case $check in
 542         # these set all the flags to specific states
 543         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 544                         ac_fold_checking= ; ac_gc_checking=1 ; ac_extra_checking= ;
 545                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 546                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 547                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 548                         ac_types_checking=1 ;;
 549         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 550                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 551                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 552                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 553                         ac_tree_checking= ; ac_valgrind_checking= ;
 554                         ac_types_checking= ;;
 555         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 556                         ac_fold_checking=1 ; ac_gc_checking=1 ; ac_extra_checking=1 ;
 557                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 558                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 559                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 560                         ac_types_checking=1 ;;
 561         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 562                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 563                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 564                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 565                         ac_tree_checking= ; ac_valgrind_checking= ;
 566                         ac_types_checking= ;;
 567         # these enable particular checks
 568         assert)         ac_assert_checking=1 ;;
 569         df)             ac_df_checking=1 ;;
 570         extra)          ac_extra_checking=1 ;;
 571         fold)           ac_fold_checking=1 ;;
 572         gc)             ac_gc_checking=1 ;;
 573         gcac)           ac_gc_always_collect=1 ;;
 574         gimple)         ac_gimple_checking=1 ;;
 575         misc)           ac_checking=1 ;;
 576         rtl)            ac_rtl_checking=1 ;;
 577         rtlflag)        ac_rtlflag_checking=1 ;;
 578         runtime)        ac_runtime_checking=1 ;;
 579         tree)           ac_tree_checking=1 ;;
 580         types)          ac_types_checking=1 ;;
 581         valgrind)       ac_valgrind_checking=1 ;;
 582         *)      AC_MSG_ERROR(unknown check category $check) ;;
 583         esac
 584 done
 585 IFS="$ac_save_IFS"
 586
 587 nocommon_flag=""
 588 if test x$ac_checking != x ; then
 589   AC_DEFINE(CHECKING_P, 1,
 590 [Define to 0/1 if you want more run-time sanity checks.  This one gets a grab
 591 bag of miscellaneous but relatively cheap checks.])
 592   nocommon_flag=-fno-common
 593 else
 594   AC_DEFINE(CHECKING_P, 0)
 595 fi
 596 AC_SUBST(nocommon_flag)
 597 if test x$ac_extra_checking != x ; then
 598   AC_DEFINE(ENABLE_EXTRA_CHECKING, 1,
 599 [Define to 0/1 if you want extra run-time checking that might affect code
 600 generation.])
 601 else
 602   AC_DEFINE(ENABLE_EXTRA_CHECKING, 0)
 603 fi
 604 if test x$ac_df_checking != x ; then
 605   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 606 [Define if you want more run-time sanity checks for dataflow.])
 607 fi
 608 if test x$ac_assert_checking != x ; then
 609   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 610 [Define if you want assertions enabled.  This is a cheap check.])
 611 fi
 612 if test x$ac_gimple_checking != x ; then
 613   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 614 [Define if you want operations on GIMPLE (the basic data structure of
 615 the high-level optimizers) to be checked for dynamic type safety at
 616 runtime.  This is moderately expensive.])
 617 fi
 618 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 619 if test x$ac_runtime_checking != x ; then
 620   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 621 [Define if you want runtime assertions enabled.  This is a cheap check.])
 622 fi
 623 if test x$ac_tree_checking != x ; then
 624   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 625 [Define if you want all operations on trees (the basic data
 626    structure of the front ends) to be checked for dynamic type safety
 627    at runtime.  This is moderately expensive.
 628    ])
 629   TREECHECKING=yes
 630 fi
 631 if test x$ac_types_checking != x ; then
 632   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 633 [Define if you want all gimple types to be verified after gimplifiation.
 634    This is cheap.
 635    ])
 636 fi
 637 AC_SUBST(TREECHECKING)
 638 if test x$ac_rtl_checking != x ; then
 639   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 640 [Define if you want all operations on RTL (the basic data structure
 641    of the optimizer and back end) to be checked for dynamic type safety
 642    at runtime.  This is quite expensive.])
 643 fi
 644 if test x$ac_rtlflag_checking != x ; then
 645   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 646 [Define if you want RTL flag accesses to be checked against the RTL
 647    codes that are supported for each access macro.  This is relatively
 648    cheap.])
 649 fi
 650 if test x$ac_gc_checking != x ; then
 651   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 652 [Define if you want the garbage collector to do object poisoning and
 653    other memory allocation checks.  This is quite expensive.])
 654 fi
 655 if test x$ac_gc_always_collect != x ; then
 656   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 657 [Define if you want the garbage collector to operate in maximally
 658    paranoid mode, validating the entire heap and collecting garbage at
 659    every opportunity.  This is extremely expensive.])
 660 fi
 661 if test x$ac_fold_checking != x ; then
 662   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 663 [Define if you want fold checked that it never destructs its argument.
 664    This is quite expensive.])
 665 fi
 666 valgrind_path_defines=
 667 valgrind_command=
 668
 669 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 670 dnl # an if statement.  This was the source of very frustrating bugs
 671 dnl # in converting to autoconf 2.5x!
 672 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 673
 674 # It is certainly possible that there's valgrind but no valgrind.h.
 675 # GCC relies on making annotations so we must have both.
 676 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 677 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 678   [[#include <valgrind/memcheck.h>
 679 #ifndef VALGRIND_DISCARD
 680 #error VALGRIND_DISCARD not defined
 681 #endif]])],
 682   [gcc_cv_header_valgrind_memcheck_h=yes],
 683   [gcc_cv_header_valgrind_memcheck_h=no])
 684 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 685 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 686 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 687   [[#include <memcheck.h>
 688 #ifndef VALGRIND_DISCARD
 689 #error VALGRIND_DISCARD not defined
 690 #endif]])],
 691   [gcc_cv_header_memcheck_h=yes],
 692   [gcc_cv_header_memcheck_h=no])
 693 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 694 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 695   AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 696         [Define if valgrind's valgrind/memcheck.h header is installed.])
 697 fi
 698 if test $gcc_cv_header_memcheck_h = yes; then
 699   AC_DEFINE(HAVE_MEMCHECK_H, 1,
 700         [Define if valgrind's memcheck.h header is installed.])
 701 fi
 702
 703 if test x$ac_valgrind_checking != x ; then
 704   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 705         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 706   if test "x$valgrind_path" = "x" \
 707     || (test $have_valgrind_h = no \
 708         && test $gcc_cv_header_memcheck_h = no \
 709         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 710         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 711   fi
 712   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 713   valgrind_command="$valgrind_path -q"
 714   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 715 [Define if you want to run subprograms and generated programs
 716    through valgrind (a memory checker).  This is extremely expensive.])
 717 fi
 718 AC_SUBST(valgrind_path_defines)
 719 AC_SUBST(valgrind_command)
 720
 721 # Enable code coverage collection
 722 AC_ARG_ENABLE(coverage,
 723 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
 724                 [enable compiler's code coverage collection.
 725                  Use to measure compiler performance and locate
 726                  unused parts of the compiler. With LEVEL, specify
 727                  optimization. Values are opt, noopt,
 728                  default is noopt])],
 729 [case "${enableval}" in
 730   yes|noopt)
 731     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0 -fkeep-static-functions"
 732     ;;
 733   opt)
 734     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2 -fkeep-static-functions"
 735     ;;
 736   no)
 737     # a.k.a. --disable-coverage
 738     coverage_flags=""
 739     ;;
 740   *)
 741     AC_MSG_ERROR(unknown coverage setting $enableval)
 742     ;;
 743 esac],
 744 [coverage_flags=""])
 745 AC_SUBST(coverage_flags)
 746
 747 AC_ARG_ENABLE(gather-detailed-mem-stats,
 748 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
 749                 [enable detailed memory allocation stats gathering])], [],
 750 [enable_gather_detailed_mem_stats=no])
 751 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
 752 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
 753 [Define to enable detailed memory allocation stats gathering.])
 754
 755 AC_ARG_ENABLE(valgrind-annotations,
 756 [AS_HELP_STRING([--enable-valgrind-annotations],
 757                 [enable valgrind runtime interaction])], [],
 758 [enable_valgrind_annotations=no])
 759 if test x$enable_valgrind_annotations != xno \
 760     || test x$ac_valgrind_checking != x; then
 761   if (test $have_valgrind_h = no \
 762       && test $gcc_cv_header_memcheck_h = no \
 763       && test $gcc_cv_header_valgrind_memcheck_h = no); then
 764     AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
 765   fi
 766   AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
 767 [Define to get calls to the valgrind runtime enabled.])
 768 fi
 769
 770 # -------------------------------
 771 # Miscenalleous configure options
 772 # -------------------------------
 773
 774 # With stabs
 775 AC_ARG_WITH(stabs,
 776 [AS_HELP_STRING([--with-stabs],
 777                 [arrange to use stabs instead of host debug format])],
 778 stabs="$with_stabs",
 779 stabs=no)
 780
 781 # Determine whether or not multilibs are enabled.
 782 AC_ARG_ENABLE(multilib,
 783 [AS_HELP_STRING([--enable-multilib],
 784                 [enable library support for multiple ABIs])],
 785 [], [enable_multilib=yes])
 786 AC_SUBST(enable_multilib)
 787
 788 # Determine whether or not multiarch is enabled.
 789 AC_ARG_ENABLE(multiarch,
 790 [AS_HELP_STRING([--enable-multiarch],
 791                 [enable support for multiarch paths])],
 792 [case "${enableval}" in
 793 yes|no|auto) enable_multiarch=$enableval;;
 794 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
 795 esac], [enable_multiarch=auto])
 796 if test x${enable_multiarch} = xauto; then
 797   if test x${with_native_system_header_dir} != x; then
 798     ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
 799     enable_multiarch=no
 800   fi
 801   if test x$host != x$target && test "x$with_sysroot" = x; then
 802     ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
 803     enable_multiarch=no
 804   fi
 805 fi
 806 AC_MSG_CHECKING(for multiarch configuration)
 807 AC_SUBST(enable_multiarch)
 808 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
 809
 810 # needed for setting the multiarch name for soft-float/hard-float ABIs
 811 AC_SUBST(with_cpu)
 812 AC_SUBST(with_float)
 813
 814 # Enable __cxa_atexit for C++.
 815 AC_ARG_ENABLE(__cxa_atexit,
 816 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
 817 [], [])
 818
 819 # Enable C extension for decimal float if target supports it.
 820 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 821
 822 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 823 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 824 [Define to 1 to enable decimal float extension to C.])
 825
 826 # Use default_decimal_float for dependency.
 827 enable_decimal_float=$default_decimal_float
 828
 829 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 830 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 831 [Define to 1 to specify that we are using the BID decimal floating
 832 point format instead of DPD])
 833
 834 # Enable C extension for fixed-point arithmetic.
 835 AC_ARG_ENABLE(fixed-point,
 836 [AS_HELP_STRING([--enable-fixed-point],
 837                 [enable fixed-point arithmetic extension to C])],
 838 [],
 839 [
 840   case $target in
 841     arm*)
 842       enable_fixed_point=yes
 843       ;;
 844
 845     mips*-*-*)
 846       enable_fixed_point=yes
 847       ;;
 848     *)
 849       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 850       enable_fixed_point=no
 851       ;;
 852   esac
 853 ])
 854 AC_SUBST(enable_fixed_point)
 855
 856 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 857 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 858 [Define to 1 to enable fixed-point arithmetic extension to C.])
 859
 860 # Enable threads
 861 # Pass with no value to take the default
 862 # Pass with a value to specify a thread package
 863 AC_ARG_ENABLE(threads,
 864 [AS_HELP_STRING([[--enable-threads[=LIB]]],
 865                 [enable thread usage for target GCC,
 866                  using LIB thread package])],,
 867 [enable_threads=''])
 868
 869 AC_ARG_ENABLE(tls,
 870 [AS_HELP_STRING([--enable-tls],
 871                 [enable or disable generation of tls code
 872                  overriding the assembler check for tls support])],
 873 [
 874   case $enable_tls in
 875     yes | no) ;;
 876     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 877 Valid choices are 'yes' and 'no'.]) ;;
 878   esac
 879 ], [enable_tls=''])
 880
 881 AC_ARG_ENABLE(vtable-verify,
 882 [AS_HELP_STRING([--enable-vtable-verify],
 883                 [enable vtable verification feature])],,
 884 [enable_vtable_verify=no])
 885 vtable_verify=`if test x$enable_vtable_verify = xyes; then echo 1; else echo 0; fi`
 886 AC_DEFINE_UNQUOTED(ENABLE_VTABLE_VERIFY, $vtable_verify,
 887 [Define 0/1 if vtable verification feature is enabled.])
 888
 889 AC_ARG_ENABLE(objc-gc,
 890 [AS_HELP_STRING([--enable-objc-gc],
 891                 [enable the use of Boehm's garbage collector with
 892                  the GNU Objective-C runtime])],
 893 if test x$enable_objc_gc = xno; then
 894         objc_boehm_gc=''
 895 else
 896         objc_boehm_gc=1
 897 fi,
 898 objc_boehm_gc='')
 899
 900 AC_ARG_WITH(dwarf2,
 901 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
 902 dwarf2="$with_dwarf2",
 903 dwarf2=no)
 904
 905 AC_ARG_ENABLE(shared,
 906 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
 907 [
 908   case $enable_shared in
 909   yes | no) ;;
 910   *)
 911     enable_shared=no
 912     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 913     for pkg in $enableval; do
 914       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 915         enable_shared=yes
 916       fi
 917     done
 918     IFS="$ac_save_ifs"
 919     ;;
 920   esac
 921 ], [enable_shared=yes])
 922 AC_SUBST(enable_shared)
 923
 924 AC_ARG_WITH(specs,
 925   [AS_HELP_STRING([--with-specs=SPECS],
 926                   [add SPECS to driver command-line processing])],
 927   [CONFIGURE_SPECS=$withval],
 928   [CONFIGURE_SPECS=]
 929 )
 930 AC_SUBST(CONFIGURE_SPECS)
 931
 932 ACX_PKGVERSION([GCC])
 933 ACX_BUGURL([https://gcc.gnu.org/bugs/])
 934
 935 # Sanity check enable_languages in case someone does not run the toplevel
 936 # configure # script.
 937 AC_ARG_ENABLE(languages,
 938 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
 939 [case ,${enable_languages}, in
 940        ,,|,yes,)
 941                 # go safe -- we cannot be much sure without the toplevel
 942                 # configure's
 943                 # analysis of which target libs are present and usable
 944                 enable_languages=c
 945                 ;;
 946          *,all,*)
 947                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 948                 ;;
 949         *,c,*)
 950                 ;;
 951         *)
 952                 enable_languages=c,${enable_languages}
 953                 ;;
 954 esac],
 955 [enable_languages=c])
 956
 957 if test x"$enable_as_accelerator_for" != x; then
 958   AC_DEFINE(ACCEL_COMPILER, 1,
 959     [Define if this compiler should be built as the offload target compiler.])
 960   enable_as_accelerator=yes
 961   case "${target}" in
 962     *-intelmicemul-*)
 963       # In this case we expect offload compiler to be built as native, so we
 964       # need to rename the driver to avoid clashes with host's drivers.
 965       program_transform_name="s&^&${target}-&" ;;
 966   esac
 967   sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
 968   program_transform_name=`echo $program_transform_name | sed $sedscript`
 969   accel_dir_suffix=/accel/${target_noncanonical}
 970   real_target_noncanonical=${enable_as_accelerator_for}
 971 fi
 972 AC_SUBST(enable_as_accelerator)
 973 AC_SUBST(real_target_noncanonical)
 974 AC_SUBST(accel_dir_suffix)
 975
 976 for tgt in `echo $enable_offload_targets | sed 's/,/ /g'`; do
 977   tgt=`echo $tgt | sed 's/=.*//'`
 978
 979   if echo "$tgt" | grep "^hsa" > /dev/null ; then
 980     enable_hsa=1
 981   else
 982     enable_offloading=1
 983   fi
 984
 985   if test x"$offload_targets" = x; then
 986     offload_targets=$tgt
 987   else
 988     offload_targets="$offload_targets,$tgt"
 989   fi
 990 done
 991 AC_DEFINE_UNQUOTED(OFFLOAD_TARGETS, "$offload_targets",
 992   [Define to offload targets, separated by commas.])
 993 if test x"$enable_offloading" != x; then
 994   AC_DEFINE(ENABLE_OFFLOADING, 1,
 995     [Define this to enable support for offloading.])
 996 else
 997   AC_DEFINE(ENABLE_OFFLOADING, 0,
 998     [Define this to enable support for offloading.])
 999 fi
1000
1001 if test x"$enable_hsa" = x1 ; then
1002   AC_DEFINE(ENABLE_HSA, 1,
1003     [Define this to enable support for generating HSAIL.])
1004 fi
1005
1006 AC_ARG_WITH(multilib-list,
1007 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, SH and x86-64 only)])],
1008 :,
1009 with_multilib_list=default)
1010
1011 # -------------------------
1012 # Checks for other programs
1013 # -------------------------
1014
1015 AC_PROG_MAKE_SET
1016
1017 # Find some useful tools
1018 AC_PROG_AWK
1019 # We need awk to create options.c and options.h.
1020 # Bail out if it's missing.
1021 case ${AWK} in
1022   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
1023 esac
1024
1025 gcc_AC_PROG_LN_S
1026 ACX_PROG_LN($LN_S)
1027 AC_PROG_RANLIB
1028 ranlib_flags=""
1029 AC_SUBST(ranlib_flags)
1030
1031 gcc_AC_PROG_INSTALL
1032
1033 # See if cmp has --ignore-initial.
1034 gcc_AC_PROG_CMP_IGNORE_INITIAL
1035
1036 # See if we have the mktemp command.
1037 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
1038
1039 # See if makeinfo has been installed and is modern enough
1040 # that we can use it.
1041 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
1042   [GNU texinfo.* \([0-9][0-9.]*\)],
1043   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
1044 if test $gcc_cv_prog_makeinfo_modern = no; then
1045   AC_MSG_WARN([
1046 *** Makeinfo is missing or too old.
1047 *** Info documentation will not be built.])
1048   BUILD_INFO=
1049 else
1050   BUILD_INFO=info
1051 fi
1052 AC_SUBST(BUILD_INFO)
1053
1054 # Is pod2man recent enough to regenerate manpages?
1055 AC_MSG_CHECKING([for recent Pod::Man])
1056 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
1057   AC_MSG_RESULT(yes)
1058   GENERATED_MANPAGES=generated-manpages
1059 else
1060   AC_MSG_RESULT(no)
1061   GENERATED_MANPAGES=
1062 fi
1063 AC_SUBST(GENERATED_MANPAGES)
1064
1065 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
1066
1067 # How about lex?
1068 dnl Don't use AC_PROG_LEX; we insist on flex.
1069 dnl LEXLIB is not useful in gcc.
1070 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
1071
1072 # Bison?
1073 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
1074
1075 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
1076 # check for build == host before using them.
1077
1078 # NM
1079 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
1080   && test -d ../binutils ; then
1081   NM='${objdir}/../binutils/nm-new'
1082 else
1083   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
1084 fi
1085
1086 # AR
1087 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
1088   && test -d ../binutils ; then
1089   AR='${objdir}/../binutils/ar'
1090 else
1091   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
1092 fi
1093
1094 # The jit documentation looks better if built with sphinx, but can be
1095 # built with texinfo if sphinx is not available.
1096 # Set "doc_build_sys" to "sphinx" or "texinfo" accordingly.
1097 AC_CHECK_PROG(doc_build_sys, sphinx-build, sphinx, texinfo)
1098
1099 # --------------------
1100 # Checks for C headers
1101 # --------------------
1102
1103 # Need to reject headers which give warnings, so that the -Werror bootstrap
1104 # works later. *sigh*  This needs to come before all header checks.
1105 AC_PROG_CPP_WERROR
1106
1107 AC_HEADER_STDC
1108 AC_HEADER_TIME
1109 ACX_HEADER_STRING
1110 AC_HEADER_SYS_WAIT
1111 AC_HEADER_TIOCGWINSZ
1112 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
1113                  fcntl.h ftw.h unistd.h sys/file.h sys/time.h sys/mman.h \
1114                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
1115                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
1116
1117 # Check for thread headers.
1118 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
1119 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
1120
1121 # These tests can't be done till we know if we have limits.h.
1122 gcc_AC_C_CHAR_BIT
1123 AC_C_BIGENDIAN
1124
1125 # ----------------------
1126 # Checks for C++ headers
1127 # ----------------------
1128
1129 dnl Autoconf will give an error in the configure script if there is no
1130 dnl C++ preprocessor.  Hack to prevent that.
1131 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1132 AC_PROG_CXXCPP
1133 m4_popdef([AC_MSG_ERROR])[]dnl
1134
1135 AC_CHECK_HEADERS(unordered_map)
1136 AC_CHECK_HEADERS(tr1/unordered_map)
1137 AC_CHECK_HEADERS(ext/hash_map)
1138
1139 # --------
1140 # Dependency checking.
1141 # --------
1142
1143 ZW_CREATE_DEPDIR
1144 AC_CONFIG_COMMANDS([gccdepdir],[
1145   ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1146   for lang in $subdirs c-family common
1147   do
1148       ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1149   done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1150
1151 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1152
1153 # --------
1154 # UNSORTED
1155 # --------
1156
1157
1158 # These libraries may be used by collect2.
1159 # We may need a special search path to get them linked.
1160 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1161 [save_LIBS="$LIBS"
1162 for libs in '' -lld -lmld \
1163                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1164                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1165 do
1166         LIBS="$libs"
1167         AC_TRY_LINK_FUNC(ldopen,
1168                 [gcc_cv_collect2_libs="$libs"; break])
1169 done
1170 LIBS="$save_LIBS"
1171 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1172 case $gcc_cv_collect2_libs in
1173         "none required")        ;;
1174         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1175 esac
1176 AC_SUBST(COLLECT2_LIBS)
1177
1178 # When building Ada code on Alpha, we need exc_resume which is usually in
1179 # -lexc.  So test for it.
1180 save_LIBS="$LIBS"
1181 LIBS=
1182 AC_SEARCH_LIBS(exc_resume, exc)
1183 GNAT_LIBEXC="$LIBS"
1184 LIBS="$save_LIBS"
1185 AC_SUBST(GNAT_LIBEXC)
1186
1187 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1188 save_LIBS="$LIBS"
1189 LIBS=
1190 AC_SEARCH_LIBS(kstat_open, kstat)
1191 EXTRA_GCC_LIBS="$LIBS"
1192 LIBS="$save_LIBS"
1193 AC_SUBST(EXTRA_GCC_LIBS)
1194
1195 # Some systems put ldexp and frexp in libm instead of libc; assume
1196 # they're both in the same place.  jcf-dump needs them.
1197 save_LIBS="$LIBS"
1198 LIBS=
1199 AC_SEARCH_LIBS(ldexp, m)
1200 LDEXP_LIB="$LIBS"
1201 LIBS="$save_LIBS"
1202 AC_SUBST(LDEXP_LIB)
1203
1204 # Use <inttypes.h> only if it exists,
1205 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1206 # PRId64
1207 AC_MSG_CHECKING(for inttypes.h)
1208 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1209 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1210 [[#define __STDC_FORMAT_MACROS
1211 #include <sys/types.h>
1212 #include <inttypes.h>]],
1213   [[intmax_t i = -1;
1214 #ifndef PRId64
1215 choke me
1216 #endif]])],
1217   [gcc_cv_header_inttypes_h=yes],
1218   [gcc_cv_header_inttypes_h=no])])
1219 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1220 if test $gcc_cv_header_inttypes_h = yes; then
1221   AC_DEFINE(HAVE_INTTYPES_H, 1,
1222         [Define if you have a working <inttypes.h> header file.])
1223 fi
1224
1225 dnl Disabled until we have a complete test for buggy enum bitfields.
1226 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1227
1228 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1229   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1230   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1231   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1232   putchar_unlocked putc_unlocked)
1233 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoq \
1234         popen sysconf strsignal getrusage nl_langinfo \
1235         gettimeofday mbstowcs wcswidth mmap setlocale \
1236         gcc_UNLOCKED_FUNCS madvise)
1237
1238 if test x$ac_cv_func_mbstowcs = xyes; then
1239   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1240 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1241 int main()
1242 {
1243   mbstowcs(0, "", 0);
1244   return 0;
1245 }]])],
1246     [gcc_cv_func_mbstowcs_works=yes],
1247     [gcc_cv_func_mbstowcs_works=no],
1248     [gcc_cv_func_mbstowcs_works=yes])])
1249   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1250     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1251   [Define this macro if mbstowcs does not crash when its
1252    first argument is NULL.])
1253   fi
1254 fi
1255
1256 AC_CHECK_TYPE(ssize_t, int)
1257 AC_CHECK_TYPE(caddr_t, char *)
1258
1259 GCC_AC_FUNC_MMAP_BLACKLIST
1260
1261 case "${host}" in
1262 *-*-*vms*)
1263   # Under VMS, vfork works very differently than on Unix. The standard test
1264   # won't work, and it isn't easily adaptable. It makes more sense to
1265   # just force it.
1266   ac_cv_func_vfork_works=yes
1267   ;;
1268 esac
1269 AC_FUNC_FORK
1270
1271 AM_ICONV
1272
1273 # Until we have in-tree GNU iconv:
1274 LIBICONV_DEP=
1275 if test -f "$LTLIBICONV"; then
1276   LIBICONV_DEP=$LTLIBICONV
1277 fi
1278 AC_SUBST(LIBICONV_DEP)
1279
1280 AM_LC_MESSAGES
1281
1282 AM_LANGINFO_CODESET
1283
1284 # We will need to find libiberty.h and ansidecl.h
1285 saved_CFLAGS="$CFLAGS"
1286 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1287 saved_CXXFLAGS="$CXXFLAGS"
1288 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1289
1290 # gcc_AC_CHECK_DECLS doesn't support overloaded functions, so use the
1291 # normal autoconf function for these.  But force definition of
1292 # HAVE_DECL_BASENAME like gcc_AC_CHECK_DECLS does, to suppress the bizarre
1293 # basename handling in libiberty.h.
1294 AC_CHECK_DECLS([basename(const char*), strstr(const char*,const char*)], , ,[
1295 #undef HAVE_DECL_BASENAME
1296 #define HAVE_DECL_BASENAME 1
1297 #include "ansidecl.h"
1298 #include "system.h"])
1299
1300 gcc_AC_CHECK_DECLS(getenv atol atoll asprintf sbrk abort atof getcwd getwd \
1301         madvise stpcpy strnlen strsignal strverscmp \
1302         strtol strtoul strtoll strtoull setenv unsetenv \
1303         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1304         free getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1305 #include "ansidecl.h"
1306 #include "system.h"])
1307
1308 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1309 #include "ansidecl.h"
1310 #include "system.h"
1311 #ifdef HAVE_SYS_RESOURCE_H
1312 #include <sys/resource.h>
1313 #endif
1314 ])
1315
1316 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1317 #include "ansidecl.h"
1318 #include "system.h"
1319 #ifdef HAVE_SYS_RESOURCE_H
1320 #include <sys/resource.h>
1321 #endif
1322 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1323 [Define to `long' if <sys/resource.h> doesn't define.])])
1324
1325 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1326 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1327 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1328 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1329 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1330 #include "ansidecl.h"
1331 #include "system.h"
1332 #ifdef HAVE_LDFCN_H
1333 #undef FREAD
1334 #undef FWRITE
1335 #include <ldfcn.h>
1336 #endif
1337 ])
1338
1339 gcc_AC_CHECK_DECLS(times, , ,[
1340 #include "ansidecl.h"
1341 #include "system.h"
1342 #ifdef HAVE_SYS_TIMES_H
1343 #include <sys/times.h>
1344 #endif
1345 ])
1346
1347 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1348 #include "ansidecl.h"
1349 #include "system.h"
1350 #include <signal.h>
1351 ])
1352
1353 # More time-related stuff.
1354 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1355 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1356 #include "ansidecl.h"
1357 #include "system.h"
1358 #ifdef HAVE_SYS_TIMES_H
1359 #include <sys/times.h>
1360 #endif
1361 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1362 if test $ac_cv_struct_tms = yes; then
1363   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1364   [Define if <sys/times.h> defines struct tms.])
1365 fi
1366
1367 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1368 # revisit after autoconf 2.50.
1369 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1370 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1371 #include "ansidecl.h"
1372 #include "system.h"
1373 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1374 if test $gcc_cv_type_clock_t = yes; then
1375   AC_DEFINE(HAVE_CLOCK_T, 1,
1376   [Define if <time.h> defines clock_t.])
1377 fi
1378
1379 # Check if F_SETLKW is supported by fcntl.
1380 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1381 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1382 #include <fcntl.h>]], [[
1383 struct flock fl;
1384 fl.l_whence = 0;
1385 fl.l_start = 0;
1386 fl.l_len = 0;
1387 fl.l_pid = 0;
1388 return fcntl (1, F_SETLKW, &fl);]])],
1389 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1390 if test $ac_cv_f_setlkw = yes; then
1391   AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1392   [Define if F_SETLKW supported by fcntl.])
1393 fi
1394
1395 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1396 CFLAGS="$saved_CFLAGS"
1397 CXXFLAGS="$saved_CXXFLAGS"
1398
1399 # mkdir takes a single argument on some systems.
1400 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1401
1402 # File extensions
1403 manext='.1'
1404 objext='.o'
1405 AC_SUBST(manext)
1406 AC_SUBST(objext)
1407
1408 # With Setjmp/Longjmp based exception handling.
1409 AC_ARG_ENABLE(sjlj-exceptions,
1410 [AS_HELP_STRING([--enable-sjlj-exceptions],
1411                 [arrange to use setjmp/longjmp exception handling])],
1412 [case $target in
1413   *-*-hpux10*)
1414     if test $enableval != yes; then
1415       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1416       enableval=yes
1417     fi
1418     ;;
1419 esac
1420 force_sjlj_exceptions=yes],
1421 [case $target in
1422   *-*-hpux10*)
1423     force_sjlj_exceptions=yes
1424     enableval=yes
1425     ;;
1426   lm32*-*-*)
1427      force_sjlj_exceptions=yes
1428      enableval=yes
1429      ;;
1430   *)
1431     force_sjlj_exceptions=no
1432     ;;
1433 esac])
1434 if test $force_sjlj_exceptions = yes; then
1435   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1436   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1437     [Define 0/1 to force the choice for exception handling model.])
1438 fi
1439
1440 # --------------------------------------------------------
1441 # Build, host, and target specific configuration fragments
1442 # --------------------------------------------------------
1443
1444 # Collect build-machine-specific information.
1445 . ${srcdir}/config.build || exit 1
1446
1447 # Collect host-machine-specific information.
1448 . ${srcdir}/config.host || exit 1
1449
1450 target_gtfiles=
1451
1452 # Collect target-machine-specific information.
1453 . ${srcdir}/config.gcc || exit 1
1454
1455 extra_objs="${host_extra_objs} ${extra_objs}"
1456 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1457
1458 # Default the target-machine variables that were not explicitly set.
1459 if test x"$tm_file" = x
1460 then tm_file=$cpu_type/$cpu_type.h; fi
1461
1462 if test x"$extra_headers" = x
1463 then extra_headers=; fi
1464
1465 if test x$md_file = x
1466 then md_file=$cpu_type/$cpu_type.md; fi
1467
1468 if test x$out_file = x
1469 then out_file=$cpu_type/$cpu_type.c; fi
1470
1471 if test x"$tmake_file" = x
1472 then tmake_file=$cpu_type/t-$cpu_type
1473 fi
1474
1475 # Support --enable-initfini-array.
1476 if test x$enable_initfini_array != xno; then
1477   tm_file="${tm_file} initfini-array.h"
1478 fi
1479
1480 if test x"$dwarf2" = xyes
1481 then tm_file="$tm_file tm-dwarf2.h"
1482 fi
1483
1484 # Say what files are being used for the output code and MD file.
1485 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1486 echo "Using \`$srcdir/config/$md_file' as machine description file."
1487
1488 # If any of the xm_file variables contain nonexistent files, warn
1489 # about them and drop them.
1490
1491 bx=
1492 for x in $build_xm_file; do
1493   if    test -f $srcdir/config/$x
1494   then      bx="$bx $x"
1495   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1496   fi
1497 done
1498 build_xm_file="$bx"
1499
1500 hx=
1501 for x in $host_xm_file; do
1502   if    test -f $srcdir/config/$x
1503   then      hx="$hx $x"
1504   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1505   fi
1506 done
1507 host_xm_file="$hx"
1508
1509 tx=
1510 for x in $xm_file; do
1511   if    test -f $srcdir/config/$x
1512   then      tx="$tx $x"
1513   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1514   fi
1515 done
1516 xm_file="$tx"
1517
1518 count=a
1519 for f in $tm_file; do
1520         count=${count}x
1521 done
1522 if test $count = ax; then
1523         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1524 else
1525         echo "Using the following target machine macro files:"
1526         for f in $tm_file; do
1527                 echo "  $srcdir/config/$f"
1528         done
1529 fi
1530
1531 if test x$use_long_long_for_widest_fast_int = xyes; then
1532         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1533 [Define to 1 if the 'long long' type is wider than 'long' but still
1534 efficiently supported by the host hardware.])
1535 fi
1536
1537 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1538 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1539
1540 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1541 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1542
1543 count=a
1544 for f in $host_xm_file; do
1545         count=${count}x
1546 done
1547 if test $count = a; then
1548         :
1549 elif test $count = ax; then
1550         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1551 else
1552         echo "Using the following host machine macro files:"
1553         for f in $host_xm_file; do
1554                 echo "  $srcdir/config/$f"
1555         done
1556 fi
1557 echo "Using ${out_host_hook_obj} for host machine hooks."
1558
1559 if test "$host_xm_file" != "$build_xm_file"; then
1560         count=a
1561         for f in $build_xm_file; do
1562                 count=${count}x
1563         done
1564         if test $count = a; then
1565                 :
1566         elif test $count = ax; then
1567                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1568         else
1569                 echo "Using the following build machine macro files:"
1570                 for f in $build_xm_file; do
1571                         echo "  $srcdir/config/$f"
1572                 done
1573         fi
1574 fi
1575
1576 if test -n "$configured_native_system_header_dir"; then
1577   native_system_header_dir=$configured_native_system_header_dir
1578 fi
1579 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1580 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1581
1582 case ${host} in
1583   powerpc*-*-darwin*)
1584     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1585       gcc_cv_mcontext_underscores,
1586       AC_COMPILE_IFELSE([
1587 #include <sys/cdefs.h>
1588 #include <sys/signal.h>
1589 #include <ucontext.h>
1590 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1591 ],
1592         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1593       if test $gcc_cv_mcontext_underscores = yes; then
1594         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1595           [mcontext_t fields start with __])
1596       fi
1597     ;;
1598 esac
1599
1600 # ---------
1601 # Threading
1602 # ---------
1603
1604 # Check if a valid thread package
1605 case ${enable_threads} in
1606   "" | no)
1607     # No threads
1608     target_thread_file='single'
1609     ;;
1610   yes)
1611     # default
1612     target_thread_file='single'
1613     ;;
1614   aix | dce | lynx | mipssde | posix | rtems | \
1615   single | tpf | vxworks | win32)
1616     target_thread_file=${enable_threads}
1617     ;;
1618   *)
1619     echo "${enable_threads} is an unknown thread package" 1>&2
1620     exit 1
1621     ;;
1622 esac
1623
1624 if test x${thread_file} = x; then
1625   # No thread file set by target-specific clauses in config.gcc,
1626   # so use file chosen by default logic above
1627   thread_file=${target_thread_file}
1628 fi
1629
1630 # --------
1631 # UNSORTED
1632 # --------
1633
1634 use_cxa_atexit=no
1635 if test x$enable___cxa_atexit = xyes || \
1636    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1637   if test x$host = x$target; then
1638     case $host in
1639       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1640       # keyed to flag_use_cxa_atexit
1641       *-*-mingw32*)
1642         use_cxa_atexit=yes
1643         ;;
1644       powerpc-ibm-aix*)
1645         use_cxa_atexit=yes
1646         ;;
1647       *)
1648         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1649           [echo "__cxa_atexit can't be enabled on this target"])
1650         ;;
1651     esac
1652   else
1653     # We can't check for __cxa_atexit when building a cross, so assume
1654     # it is available
1655     use_cxa_atexit=yes
1656   fi
1657   if test x$use_cxa_atexit = xyes; then
1658     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1659       [Define if you want to use __cxa_atexit, rather than atexit, to
1660       register C++ destructors for local statics and global objects.
1661       This is essential for fully standards-compliant handling of
1662       destructors, but requires __cxa_atexit in libc.])
1663   fi
1664 fi
1665
1666 # Look for a file containing extra machine modes.
1667 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1668   extra_modes_file='$(srcdir)'/config/${extra_modes}
1669   AC_SUBST(extra_modes_file)
1670   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1671   [Define to the name of a file containing a list of extra machine modes
1672    for this architecture.])
1673 fi
1674
1675 # Convert extra_options into a form suitable for Makefile use.
1676 extra_opt_files=
1677 all_opt_files=
1678 for f in $extra_options; do
1679   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1680   all_opt_files="$all_opt_files $srcdir/config/$f"
1681 done
1682 AC_SUBST(extra_opt_files)
1683
1684 # auto-host.h is the file containing items generated by autoconf and is
1685 # the first file included by config.h.
1686 # If host=build, it is correct to have bconfig include auto-host.h
1687 # as well.  If host!=build, we are in error and need to do more
1688 # work to find out the build config parameters.
1689 if test x$host = x$build
1690 then
1691         build_auto=auto-host.h
1692 else
1693         # We create a subdir, then run autoconf in the subdir.
1694         # To prevent recursion we set host and build for the new
1695         # invocation of configure to the build for this invocation
1696         # of configure.
1697         tempdir=build.$$
1698         rm -rf $tempdir
1699         mkdir $tempdir
1700         cd $tempdir
1701         case ${srcdir} in
1702         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1703         *) realsrcdir=../${srcdir};;
1704         esac
1705         # Clearing GMPINC is necessary to prevent host headers being
1706         # used by the build compiler.  Defining GENERATOR_FILE stops
1707         # system.h from including gmp.h.
1708         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1709         CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
1710         LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1711         GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
1712         ${realsrcdir}/configure \
1713                 --enable-languages=${enable_languages-all} \
1714                 --target=$target_alias --host=$build_alias --build=$build_alias
1715
1716         # We just finished tests for the build machine, so rename
1717         # the file auto-build.h in the gcc directory.
1718         mv auto-host.h ../auto-build.h
1719         cd ..
1720         rm -rf $tempdir
1721         build_auto=auto-build.h
1722 fi
1723 AC_SUBST(build_subdir)
1724
1725 tm_file="${tm_file} defaults.h"
1726 tm_p_file="${tm_p_file} tm-preds.h"
1727 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1728 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1729 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1730 # put this back in temporarily.
1731 xm_file="auto-host.h ansidecl.h ${xm_file}"
1732
1733 # --------
1734 # UNSORTED
1735 # --------
1736
1737 changequote(,)dnl
1738 # Compile in configure arguments.
1739 if test -f configargs.h ; then
1740         # Being re-configured.
1741         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1742         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1743 else
1744         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1745 fi
1746
1747 # Double all backslashes and backslash all quotes to turn
1748 # gcc_config_arguments into a C string.
1749 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1750 $gcc_config_arguments
1751 EOF
1752 gcc_config_arguments_str=`cat conftest.out`
1753 rm -f conftest.out
1754
1755 cat > configargs.h <<EOF
1756 /* Generated automatically. */
1757 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1758 static const char thread_model[] = "$thread_file";
1759
1760 static const struct {
1761   const char *name, *value;
1762 } configure_default_options[] = $configure_default_options;
1763 EOF
1764 changequote([,])dnl
1765
1766 changequote(,)dnl
1767 gcc_BASEVER=`cat $srcdir/BASE-VER`
1768 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1769 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1770 if test -f $srcdir/REVISION ; then
1771         gcc_REVISION=`cat $srcdir/REVISION`
1772 else
1773         gcc_REVISION=""
1774 fi
1775 cat > plugin-version.h <<EOF
1776 #include "configargs.h"
1777
1778 #define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
1779 #define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
1780 #define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
1781 #define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
1782
1783 static char basever[] = "$gcc_BASEVER";
1784 static char datestamp[] = "$gcc_DATESTAMP";
1785 static char devphase[] = "$gcc_DEVPHASE";
1786 static char revision[] = "$gcc_REVISION";
1787
1788 /* FIXME plugins: We should make the version information more precise.
1789    One way to do is to add a checksum. */
1790
1791 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1792                                                 devphase, revision,
1793                                                 configuration_arguments};
1794 EOF
1795 changequote([,])dnl
1796
1797 # Determine what GCC version number to use in filesystem paths.
1798 GCC_BASE_VER
1799
1800 # Internationalization
1801 ZW_GNU_GETTEXT_SISTER_DIR
1802
1803 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1804 # -liconv on the link line twice.
1805 case "$LIBINTL" in *$LIBICONV*)
1806         LIBICONV= ;;
1807 esac
1808
1809 AC_ARG_ENABLE(secureplt,
1810 [AS_HELP_STRING([--enable-secureplt],
1811                 [enable -msecure-plt by default for PowerPC])],
1812 [], [])
1813
1814 AC_ARG_ENABLE(mingw-wildcard,
1815 [AS_HELP_STRING([--enable-mingw-wildcard],
1816                 [Set whether to expand wildcard on command-line.
1817                  Default to platform configuration])],
1818 [],[enable_mingw_wildcard=platform])
1819 AS_IF([test x"$enable_mingw_wildcard" != xplatform ],
1820       [AC_DEFINE_UNQUOTED(MINGW_DOWILDCARD,
1821                  $(test x"$enable_mingw_wildcard" = xno; echo $?),
1822                  [Value to set mingw's _dowildcard to.])])
1823
1824 AC_ARG_ENABLE(leading-mingw64-underscores,
1825   AS_HELP_STRING([--enable-leading-mingw64-underscores],
1826                  [enable leading underscores on 64 bit mingw targets]),
1827   [],[])
1828 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1829   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1830     [Define if we should use leading underscore on 64 bit mingw targets])])
1831
1832 AC_ARG_ENABLE(cld,
1833 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
1834 [enable_cld=no])
1835
1836 AC_ARG_ENABLE(frame-pointer,
1837 [AS_HELP_STRING([--enable-frame-pointer],
1838                 [enable -fno-omit-frame-pointer by default for 32bit x86])], [],
1839 [
1840 case $target_os in
1841 linux* | darwin[[8912]]*)
1842   # Enable -fomit-frame-pointer by default for Linux and Darwin with
1843   # DWARF2.
1844   enable_frame_pointer=no
1845   ;;
1846 *)
1847   enable_frame_pointer=yes
1848   ;;
1849 esac
1850 ])
1851
1852 # Windows32 Registry support for specifying GCC installation paths.
1853 AC_ARG_ENABLE(win32-registry,
1854 [AS_HELP_STRING([--disable-win32-registry],
1855                 [disable lookup of installation paths in the
1856                  Registry on Windows hosts])
1857 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
1858 AS_HELP_STRING([--enable-win32-registry=KEY],
1859                [use KEY instead of GCC version as the last portion
1860                 of the registry key])],,)
1861
1862 case $host_os in
1863   win32 | pe | cygwin* | mingw32*)
1864     if test "x$enable_win32_registry" != xno; then
1865       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1866     fi
1867
1868     if test "x$enable_win32_registry" != xno; then
1869       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1870   [Define to 1 if installation paths should be looked up in the Windows
1871    Registry. Ignored on non-Windows hosts.])
1872
1873       if test "x$enable_win32_registry" != xyes \
1874          && test "x$enable_win32_registry" != x; then
1875         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1876   [Define to be the last component of the Windows registry key under which
1877    to look for installation paths.  The full key used will be
1878    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1879    The default is the GCC version number.])
1880       fi
1881     fi
1882   ;;
1883 esac
1884
1885 # Get an absolute path to the GCC top-level source directory
1886 holddir=`${PWDCMD-pwd}`
1887 cd $srcdir
1888 topdir=`${PWDCMD-pwd}`
1889 cd $holddir
1890
1891 # Conditionalize the makefile for this host machine.
1892 xmake_file=
1893 for f in ${host_xmake_file}
1894 do
1895         if test -f ${srcdir}/config/$f
1896         then
1897                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1898         fi
1899 done
1900
1901 # Conditionalize the makefile for this target machine.
1902 tmake_file_=
1903 for f in ${tmake_file}
1904 do
1905         if test -f ${srcdir}/config/$f
1906         then
1907                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1908         fi
1909 done
1910 tmake_file="${tmake_file_}"
1911
1912 out_object_file=`basename $out_file .c`.o
1913 common_out_object_file=`basename $common_out_file .c`.o
1914
1915 tm_file_list="options.h"
1916 tm_include_list="options.h insn-constants.h"
1917 for f in $tm_file; do
1918   case $f in
1919     ./* )
1920        f=`echo $f | sed 's/^..//'`
1921        tm_file_list="${tm_file_list} $f"
1922        tm_include_list="${tm_include_list} $f"
1923        ;;
1924     defaults.h )
1925        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1926        tm_include_list="${tm_include_list} $f"
1927        ;;
1928     * )
1929        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1930        tm_include_list="${tm_include_list} config/$f"
1931        ;;
1932   esac
1933 done
1934
1935 tm_p_file_list=
1936 tm_p_include_list=
1937 for f in $tm_p_file; do
1938   case $f in
1939     tm-preds.h )
1940        tm_p_file_list="${tm_p_file_list} $f"
1941        tm_p_include_list="${tm_p_include_list} $f"
1942        ;;
1943     * )
1944        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1945        tm_p_include_list="${tm_p_include_list} config/$f"
1946   esac
1947 done
1948
1949 xm_file_list=
1950 xm_include_list=
1951 for f in $xm_file; do
1952   case $f in
1953     ansidecl.h )
1954        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1955        xm_include_list="${xm_include_list} $f"
1956        ;;
1957     auto-host.h )
1958        xm_file_list="${xm_file_list} $f"
1959        xm_include_list="${xm_include_list} $f"
1960        ;;
1961     * )
1962        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1963        xm_include_list="${xm_include_list} config/$f"
1964        ;;
1965   esac
1966 done
1967
1968 host_xm_file_list=
1969 host_xm_include_list=
1970 for f in $host_xm_file; do
1971   case $f in
1972     ansidecl.h )
1973        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1974        host_xm_include_list="${host_xm_include_list} $f"
1975        ;;
1976     auto-host.h )
1977        host_xm_file_list="${host_xm_file_list} $f"
1978        host_xm_include_list="${host_xm_include_list} $f"
1979        ;;
1980     * )
1981        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1982        host_xm_include_list="${host_xm_include_list} config/$f"
1983        ;;
1984   esac
1985 done
1986
1987 build_xm_file_list=
1988 for f in $build_xm_file; do
1989   case $f in
1990     ansidecl.h )
1991        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1992        build_xm_include_list="${build_xm_include_list} $f"
1993        ;;
1994     auto-build.h | auto-host.h )
1995        build_xm_file_list="${build_xm_file_list} $f"
1996        build_xm_include_list="${build_xm_include_list} $f"
1997        ;;
1998     * )
1999        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
2000        build_xm_include_list="${build_xm_include_list} config/$f"
2001        ;;
2002   esac
2003 done
2004
2005 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
2006 # cross-compiler which does not use the native headers and libraries.
2007 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
2008 CROSS=                                          AC_SUBST(CROSS)
2009 ALL=all.internal                                AC_SUBST(ALL)
2010 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
2011 BUILD_SYSTEM_HEADER_DIR=$SYSTEM_HEADER_DIR      AC_SUBST(BUILD_SYSTEM_HEADER_DIR)
2012
2013 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x ||
2014    test x$build != x$host || test "x$with_build_sysroot" != x; then
2015   if test "x$with_build_sysroot" != x; then
2016     BUILD_SYSTEM_HEADER_DIR=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
2017   else
2018     BUILD_SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2019   fi
2020
2021   if test x$host != x$target
2022   then
2023     CROSS="-DCROSS_DIRECTORY_STRUCTURE"
2024     ALL=all.cross
2025     SYSTEM_HEADER_DIR=$BUILD_SYSTEM_HEADER_DIR
2026   elif test "x$TARGET_SYSTEM_ROOT" != x; then
2027     SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2028   fi
2029
2030   if test "x$with_build_sysroot" != "x"; then
2031     target_header_dir="${with_build_sysroot}${native_system_header_dir}"
2032   elif test "x$with_sysroot" = x; then
2033     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
2034   elif test "x$with_sysroot" = xyes; then
2035     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
2036   else
2037     target_header_dir="${with_sysroot}${native_system_header_dir}"
2038   fi
2039 else
2040   target_header_dir=${native_system_header_dir}
2041 fi
2042
2043 # If this is a cross-compiler that does not
2044 # have its own set of headers then define
2045 # inhibit_libc
2046
2047 # If this is using newlib, without having the headers available now,
2048 # then define inhibit_libc in LIBGCC2_CFLAGS.
2049 # This prevents libgcc2 from containing any code which requires libc
2050 # support.
2051 : ${inhibit_libc=false}
2052 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
2053        test x$with_newlib = xyes ; } &&
2054      { test "x$with_headers" = xno || test ! -f "$target_header_dir/stdio.h"; } ; then
2055        inhibit_libc=true
2056 fi
2057 AC_SUBST(inhibit_libc)
2058
2059 # When building gcc with a cross-compiler, we need to adjust things so
2060 # that the generator programs are still built with the native compiler.
2061 # Also, we cannot run fixincludes.
2062
2063 # These are the normal (build=host) settings:
2064 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
2065 CXX_FOR_BUILD='$(CXX)'          AC_SUBST(CXX_FOR_BUILD)
2066 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
2067 BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
2068 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
2069 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
2070
2071 BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS)' AC_SUBST(BUILD_NO_PIE_CFLAGS)
2072 BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG)' AC_SUBST(BUILD_NO_PIE_FLAG)
2073
2074 # And these apply if build != host, or we are generating coverage data
2075 if test x$build != x$host || test "x$coverage_flags" != x
2076 then
2077     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
2078     BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CXXFLAGS_FOR_BUILD)'
2079     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
2080
2081     NO_PIE_CFLAGS_FOR_BUILD=${NO_PIE_CFLAGS_FOR_BUILD-${NO_PIE_CFLAGS}}
2082     NO_PIE_FLAG_FOR_BUILD=${NO_PIE_FLAG_FOR_BUILD-${NO_PIE_FLAG}}
2083     BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS_FOR_BUILD)'
2084     BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG_FOR_BUILD)'
2085 fi
2086 AC_SUBST(NO_PIE_CFLAGS_FOR_BUILD)
2087 AC_SUBST(NO_PIE_FLAG_FOR_BUILD)
2088
2089 # Expand extra_headers to include complete path.
2090 # This substitutes for lots of t-* files.
2091 extra_headers_list=
2092 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
2093 for file in ${extra_headers} ; do
2094   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
2095 done
2096
2097 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
2098 if test x"$use_gcc_tgmath" = xyes
2099 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
2100 fi
2101
2102 # Define collect2 in Makefile.
2103 case $host_can_use_collect2 in
2104   no) collect2= ;;
2105   *) collect2='collect2$(exeext)' ;;
2106 esac
2107 AC_SUBST([collect2])
2108
2109 # Add a definition of USE_COLLECT2 if system wants one.
2110 case $use_collect2 in
2111   no) use_collect2= ;;
2112   "") ;;
2113   *)
2114     host_xm_defines="${host_xm_defines} USE_COLLECT2"
2115     xm_defines="${xm_defines} USE_COLLECT2"
2116     case $host_can_use_collect2 in
2117       no)
2118         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
2119         ;;
2120     esac
2121     ;;
2122 esac
2123
2124 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
2125 [Define to the name of the LTO plugin DSO that must be
2126   passed to the linker's -plugin=LIB option.])
2127
2128 # ---------------------------
2129 # Assembler & linker features
2130 # ---------------------------
2131
2132 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
2133 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
2134 # However when ld-new is first executed from the build tree, libtool will
2135 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
2136 # to the build tree.  While doing this we need to use the previous-stage
2137 # linker, or we have an infinite loop.  The presence of a shell script as
2138 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
2139 # the gcc/collect-ld script.  So we need to know how libtool works, or
2140 # exec-tool will fail.
2141
2142 m4_defun([_LT_CONFIG_COMMANDS], [])
2143 AC_PROG_LIBTOOL
2144 AC_SUBST(objdir)
2145 AC_SUBST(enable_fast_install)
2146
2147 # Identify the assembler which will work hand-in-glove with the newly
2148 # built GCC, so that we can examine its features.  This is the assembler
2149 # which will be driven by the driver program.
2150 #
2151 # If build != host, and we aren't building gas in-tree, we identify a
2152 # build->target assembler and hope that it will have the same features
2153 # as the host->target assembler we'll be using.
2154 gcc_cv_gas_major_version=
2155 gcc_cv_gas_minor_version=
2156 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
2157
2158 m4_pattern_allow([AS_FOR_TARGET])dnl
2159 AS_VAR_SET_IF(gcc_cv_as,, [
2160 if test -x "$DEFAULT_ASSEMBLER"; then
2161         gcc_cv_as="$DEFAULT_ASSEMBLER"
2162 elif test -f $gcc_cv_as_gas_srcdir/configure.ac \
2163      && test -f ../gas/Makefile \
2164      && test x$build = x$host; then
2165         gcc_cv_as=../gas/as-new$build_exeext
2166 elif test -x as$build_exeext; then
2167         # Build using assembler in the current directory.
2168         gcc_cv_as=./as$build_exeext
2169 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
2170         gcc_cv_as="$AS_FOR_TARGET"
2171 else
2172         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
2173 fi])
2174
2175 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
2176 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
2177 case "$ORIGINAL_AS_FOR_TARGET" in
2178   ./as | ./as$build_exeext) ;;
2179   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
2180 esac
2181
2182 AC_MSG_CHECKING(what assembler to use)
2183 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
2184   # Single tree build which includes gas.  We want to prefer it
2185   # over whatever linker top-level may have detected, since
2186   # we'll use what we're building after installation anyway.
2187   AC_MSG_RESULT(newly built gas)
2188   in_tree_gas=yes
2189   _gcc_COMPUTE_GAS_VERSION
2190   in_tree_gas_is_elf=no
2191   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
2192      || (grep 'obj_format = multi' ../gas/Makefile \
2193          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
2194   then
2195     in_tree_gas_is_elf=yes
2196   fi
2197 else
2198   AC_MSG_RESULT($gcc_cv_as)
2199   in_tree_gas=no
2200 fi
2201
2202 default_ld=
2203 AC_ARG_ENABLE(ld,
2204 [[  --enable-ld[=ARG]       build ld [ARG={default,yes,no}]]],
2205 [case "${enableval}" in
2206  no)
2207    default_ld=ld.gold
2208    ;;
2209  esac])
2210
2211 install_gold_as_default=no
2212 AC_ARG_ENABLE(gold,
2213 [[  --enable-gold[=ARG]     build gold [ARG={default,yes,no}]]],
2214 [case "${enableval}" in
2215  default)
2216    install_gold_as_default=yes
2217    ;;
2218  yes)
2219    if test x${default_ld} != x; then
2220      install_gold_as_default=yes
2221    fi
2222    ;;
2223  no)
2224    ;;
2225  *)
2226    AC_MSG_ERROR([invalid --enable-gold argument])
2227    ;;
2228  esac])
2229
2230 # Identify the linker which will work hand-in-glove with the newly
2231 # built GCC, so that we can examine its features.  This is the linker
2232 # which will be driven by the driver program.
2233 #
2234 # If build != host, and we aren't building gas in-tree, we identify a
2235 # build->target linker and hope that it will have the same features
2236 # as the host->target linker we'll be using.
2237 gcc_cv_gld_major_version=
2238 gcc_cv_gld_minor_version=
2239 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
2240 gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
2241 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
2242
2243 AS_VAR_SET_IF(gcc_cv_ld,, [
2244 if test -x "$DEFAULT_LINKER"; then
2245         gcc_cv_ld="$DEFAULT_LINKER"
2246 elif test $install_gold_as_default = yes \
2247      && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
2248      && test -f ../gold/Makefile \
2249      && test x$build = x$host; then
2250         gcc_cv_ld=../gold/ld-new$build_exeext
2251 elif test -f $gcc_cv_ld_gld_srcdir/configure.ac \
2252      && test -f ../ld/Makefile \
2253      && test x$build = x$host; then
2254         gcc_cv_ld=../ld/ld-new$build_exeext
2255 elif test -x collect-ld$build_exeext; then
2256         # Build using linker in the current directory.
2257         gcc_cv_ld=./collect-ld$build_exeext
2258 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2259         gcc_cv_ld="$LD_FOR_TARGET"
2260 else
2261         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2262 fi])
2263
2264 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2265 PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
2266 # if the PLUGIN_LD is set ld-new, just have it as ld
2267 # as that is the installed named.
2268 if test x$PLUGIN_LD_SUFFIX = xld-new \
2269    || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
2270   PLUGIN_LD_SUFFIX=ld
2271 fi
2272 AC_ARG_WITH(plugin-ld,
2273 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2274 [if test x"$withval" != x; then
2275    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2276    PLUGIN_LD_SUFFIX="$withval"
2277  fi])
2278 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2279 AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
2280
2281 # Check to see if we are using gold instead of ld
2282 AC_MSG_CHECKING(whether we are using gold)
2283 ld_is_gold=no
2284 if test x$gcc_cv_ld != x; then
2285   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2286      | grep "GNU gold" > /dev/null; then
2287     ld_is_gold=yes
2288   fi
2289 fi
2290 AC_MSG_RESULT($ld_is_gold)
2291
2292 AC_MSG_CHECKING(gold linker with split stack support as non default)
2293 # Check to see if default ld is not gold, but gold is
2294 # available and has support for split stack.  If gcc was configured
2295 # with gold then no checking is done.
2296 #
2297 if test x$ld_is_gold = xno && which ${gcc_cv_ld}.gold >/dev/null 2>&1; then
2298
2299 # For platforms other than powerpc64*, enable as appropriate.
2300
2301   gold_non_default=no
2302   ld_gold=`which ${gcc_cv_ld}.gold`
2303 # Make sure this gold has minimal split stack support
2304   if $ld_gold --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
2305     ld_vers=`$ld_gold --version | sed 1q`
2306     gold_vers=`echo $ld_vers | sed -n \
2307           -e 's,^[[^)]]*[[  ]]\([[0-9]][[0-9]]*\.[[0-9]][[0-9]]*[[^)]]*\)) .*$,\1,p'`
2308     case $target in
2309 # check that the gold version contains the complete split stack support
2310 # on powerpc64 big and little endian
2311       powerpc64*-*-*)
2312         case "$gold_vers" in
2313           2.25.[[1-9]]*|2.2[[6-9]][[.0-9]]*|2.[[3-9]][[.0-9]]*|[[3-9]].[[.0-9]]*) gold_non_default=yes
2314           ;;
2315           *) gold_non_default=no
2316           ;;
2317         esac
2318         ;;
2319     esac
2320   fi
2321   if test $gold_non_default = yes; then
2322     AC_DEFINE(HAVE_GOLD_NON_DEFAULT_SPLIT_STACK, 1,
2323             [Define if the gold linker supports split stack and is available as a non-default])
2324   fi
2325 fi
2326 AC_MSG_RESULT($gold_non_default)
2327
2328 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2329 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2330 case "$ORIGINAL_LD_FOR_TARGET" in
2331   ./collect-ld | ./collect-ld$build_exeext) ;;
2332   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2333 esac
2334
2335 AC_MSG_CHECKING(what linker to use)
2336 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2337    || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2338         # Single tree build which includes ld.  We want to prefer it
2339         # over whatever linker top-level may have detected, since
2340         # we'll use what we're building after installation anyway.
2341         AC_MSG_RESULT(newly built ld)
2342         in_tree_ld=yes
2343         in_tree_ld_is_elf=no
2344         if (grep 'EMUL = .*elf' ../ld/Makefile \
2345             || grep 'EMUL = .*linux' ../ld/Makefile \
2346             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2347           in_tree_ld_is_elf=yes
2348         elif test "$ld_is_gold" = yes; then
2349           in_tree_ld_is_elf=yes
2350         fi
2351         for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.ac $gcc_cv_ld_gld_srcdir/Makefile.in
2352         do
2353 changequote(,)dnl
2354                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
2355                 if test x$gcc_cv_gld_version != x; then
2356                         break
2357                 fi
2358         done
2359         case $gcc_cv_gld_version in
2360           VERSION=[0-9]*) ;;
2361 changequote([,])dnl
2362           *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
2363 changequote(,)dnl
2364         esac
2365         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2366         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2367 changequote([,])dnl
2368         ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
2369         ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
2370 else
2371         AC_MSG_RESULT($gcc_cv_ld)
2372         in_tree_ld=no
2373         gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
2374         ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
2375         ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
2376 fi
2377
2378 AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
2379 AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)
2380
2381 # Figure out what nm we will be using.
2382 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2383 AS_VAR_SET_IF(gcc_cv_nm,, [
2384 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2385      && test -f ../binutils/Makefile \
2386      && test x$build = x$host; then
2387         gcc_cv_nm=../binutils/nm-new$build_exeext
2388 elif test -x nm$build_exeext; then
2389         gcc_cv_nm=./nm$build_exeext
2390 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2391         gcc_cv_nm="$NM_FOR_TARGET"
2392 else
2393         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2394 fi])
2395
2396 AC_MSG_CHECKING(what nm to use)
2397 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2398         # Single tree build which includes binutils.
2399         AC_MSG_RESULT(newly built nm)
2400         in_tree_nm=yes
2401 else
2402         AC_MSG_RESULT($gcc_cv_nm)
2403         in_tree_nm=no
2404 fi
2405
2406 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2407 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2408 case "$ORIGINAL_NM_FOR_TARGET" in
2409   ./nm | ./nm$build_exeext) ;;
2410   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2411 esac
2412
2413
2414 # Figure out what objdump we will be using.
2415 AS_VAR_SET_IF(gcc_cv_objdump,, [
2416 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2417      && test -f ../binutils/Makefile \
2418      && test x$build = x$host; then
2419         # Single tree build which includes binutils.
2420         gcc_cv_objdump=../binutils/objdump$build_exeext
2421 elif test -x objdump$build_exeext; then
2422         gcc_cv_objdump=./objdump$build_exeext
2423 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2424         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2425 else
2426         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2427 fi])
2428
2429 AC_MSG_CHECKING(what objdump to use)
2430 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2431         # Single tree build which includes binutils.
2432         AC_MSG_RESULT(newly built objdump)
2433 elif test x$gcc_cv_objdump = x; then
2434         AC_MSG_RESULT(not found)
2435 else
2436         AC_MSG_RESULT($gcc_cv_objdump)
2437 fi
2438
2439 # Figure out what readelf we will be using.
2440 AS_VAR_SET_IF(gcc_cv_readelf,, [
2441 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2442      && test -f ../binutils/Makefile \
2443      && test x$build = x$host; then
2444         # Single tree build which includes binutils.
2445         gcc_cv_readelf=../binutils/readelf$build_exeext
2446 elif test -x readelf$build_exeext; then
2447         gcc_cv_readelf=./readelf$build_exeext
2448 elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
2449         gcc_cv_readelf="$READELF_FOR_TARGET"
2450 else
2451         AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
2452 fi])
2453
2454 AC_MSG_CHECKING(what readelf to use)
2455 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2456         # Single tree build which includes binutils.
2457         AC_MSG_RESULT(newly built readelf)
2458 elif test x$gcc_cv_readelf = x; then
2459         AC_MSG_RESULT(not found)
2460 else
2461         AC_MSG_RESULT($gcc_cv_readelf)
2462 fi
2463
2464 # Figure out what assembler alignment features are present.
2465 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2466  [2,6,0],,
2467 [.balign 4
2468 .p2align 2],,
2469 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2470   [Define if your assembler supports .balign and .p2align.])])
2471
2472 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2473  [2,8,0],,
2474  [.p2align 4,,7],,
2475 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2476   [Define if your assembler supports specifying the maximum number
2477    of bytes to skip when using the GAS .p2align command.])])
2478
2479 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2480  [2,8,0],,
2481  [.literal16],,
2482 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2483   [Define if your assembler supports .literal16.])])
2484
2485 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2486  [elf,2,9,0],,
2487  [conftest_label1: .word 0
2488 .subsection -1
2489 conftest_label2: .word 0
2490 .previous],
2491  [if test x$gcc_cv_nm != x; then
2492     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2493     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2494     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2495     then :
2496     else gcc_cv_as_subsection_m1=yes
2497     fi
2498     rm -f conftest.nm1 conftest.nm2
2499   fi],
2500  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2501   [Define if your assembler supports .subsection and .subsection -1 starts
2502    emitting at the beginning of your section.])])
2503
2504 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2505  [2,2,0],,
2506  [      .weak foobar],,
2507 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2508
2509 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2510  [2,17,0],,
2511  [      .weakref foobar, barfnot],,
2512 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2513
2514 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2515  [2,15,91],,
2516  [      .SPACE $TEXT$
2517         .NSUBSPA $CODE$,COMDAT],,
2518 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2519
2520 # .hidden needs to be supported in both the assembler and the linker,
2521 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2522 # This is irritatingly difficult to feature test for; we have to check the
2523 # date string after the version number.  If we've got an in-tree
2524 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2525 # to be safe.
2526 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2527 case "${target}" in
2528   *-*-aix*)
2529     conftest_s='        .globl foobar,hidden'
2530     ;;
2531   *)
2532     conftest_s='        .hidden foobar
2533 foobar:'
2534     ;;
2535 esac
2536 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2537  [elf,2,13,0],, [$conftest_s])
2538 case "${target}" in
2539   *-*-darwin*)
2540     # Darwin as has some visibility support, though with a different syntax.
2541     gcc_cv_as_hidden=yes
2542     ;;
2543 esac
2544
2545 # gnu_indirect_function type is an extension proposed at
2546 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2547 # selection of function implementation
2548 AC_ARG_ENABLE(gnu-indirect-function,
2549  [AS_HELP_STRING([--enable-gnu-indirect-function],
2550                  [enable the use of the @gnu_indirect_function to glibc systems])],
2551  [case $enable_gnu_indirect_function in
2552     yes | no) ;;
2553     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2554 Valid choices are 'yes' and 'no'.]) ;;
2555   esac],
2556  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2557
2558 gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
2559 AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
2560 [Define if your system supports gnu indirect functions.])
2561
2562
2563 changequote(,)dnl
2564 if test $in_tree_ld != yes ; then
2565   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2566   if echo "$ld_ver" | grep GNU > /dev/null; then
2567     if test x"$ld_is_gold" = xyes; then
2568       # GNU gold --version looks like this:
2569       #
2570       # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
2571       #
2572       # We extract the binutils version which is more familiar and specific
2573       # than the gold version.
2574       ld_vers=`echo $ld_ver | sed -n \
2575           -e 's,^[^)]*[  ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
2576     else
2577       # GNU ld --version looks like this:
2578       #
2579       # GNU ld (GNU Binutils) 2.21.51.20110225
2580       ld_vers=`echo $ld_ver | sed -n \
2581           -e 's,^.*[     ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2582     fi
2583     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2584     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2585     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2586     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2587   else
2588     case "${target}" in
2589       *-*-solaris2*)
2590         # Solaris 2 ld -V output looks like this for a regular version:
2591         #
2592         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
2593         #
2594         # but test versions add stuff at the end:
2595         #
2596         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
2597         #
2598         # In Solaris 11.4, this was changed to
2599         #
2600         # ld: Solaris ELF Utilities: 11.4-1.3123
2601         #
2602         # ld and ld.so.1 are guaranteed to be updated in lockstep, so ld version
2603         # numbers can be used in ld.so.1 feature checks even if a different
2604         # linker is configured.
2605         ld_ver=`$gcc_cv_ld -V 2>&1`
2606         if echo "$ld_ver" | $EGREP 'Solaris Link Editors|Solaris ELF Utilities' > /dev/null; then
2607           ld_vers=`echo $ld_ver | sed -n \
2608             -e 's,^.*: \(5\|1[0-9]\)\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\2,p'`
2609           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2610           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2611         fi
2612         ;;
2613     esac
2614   fi
2615 fi
2616 changequote([,])dnl
2617
2618 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2619 [[if test $in_tree_ld = yes ; then
2620   gcc_cv_ld_hidden=no
2621   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2622      && test $in_tree_ld_is_elf = yes; then
2623      gcc_cv_ld_hidden=yes
2624   fi
2625 else
2626   gcc_cv_ld_hidden=yes
2627   if test x"$ld_is_gold" = xyes; then
2628     :
2629   elif echo "$ld_ver" | grep GNU > /dev/null; then
2630     case "${target}" in
2631       mmix-knuth-mmixware)
2632         # The linker emits by default mmo, not ELF, so "no" is appropriate.
2633         gcc_cv_ld_hidden=no
2634         ;;
2635     esac
2636     if test 0"$ld_date" -lt 20020404; then
2637       if test -n "$ld_date"; then
2638         # If there was date string, but was earlier than 2002-04-04, fail
2639         gcc_cv_ld_hidden=no
2640       elif test -z "$ld_vers"; then
2641         # If there was no date string nor ld version number, something is wrong
2642         gcc_cv_ld_hidden=no
2643       else
2644         test -z "$ld_vers_patch" && ld_vers_patch=0
2645         if test "$ld_vers_major" -lt 2; then
2646           gcc_cv_ld_hidden=no
2647         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2648           gcc_cv_ld_hidden="no"
2649         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2650           gcc_cv_ld_hidden=no
2651         fi
2652       fi
2653     fi
2654   else
2655     case "${target}" in
2656       *-*-aix[789]*)
2657         gcc_cv_ld_hidden=yes
2658         ;;
2659       *-*-darwin*)
2660         # Darwin ld has some visibility support.
2661         gcc_cv_ld_hidden=yes
2662         ;;
2663       hppa64*-*-hpux* | ia64*-*-hpux*)
2664         gcc_cv_ld_hidden=yes
2665         ;;
2666       *-*-solaris2.1[0-9]*)
2667         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2668         # .symbolic was only added in Solaris 9 12/02.
2669         gcc_cv_ld_hidden=yes
2670         ;;
2671       *)
2672         gcc_cv_ld_hidden=no
2673         ;;
2674     esac
2675   fi
2676 fi]])
2677 libgcc_visibility=no
2678 AC_SUBST(libgcc_visibility)
2679 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2680 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2681   libgcc_visibility=yes
2682   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2683   [Define if your assembler and linker support .hidden.])
2684 fi
2685
2686 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2687 gcc_cv_ld_ro_rw_mix=unknown
2688 if test $in_tree_ld = yes ; then
2689   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2690      && test $in_tree_ld_is_elf = yes; then
2691     gcc_cv_ld_ro_rw_mix=read-write
2692   fi
2693 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2694   echo '.section myfoosect, "a"' > conftest1.s
2695   echo '.section myfoosect, "aw"' > conftest2.s
2696   echo '.byte 1' >> conftest2.s
2697   echo '.section myfoosect, "a"' > conftest3.s
2698   echo '.byte 0' >> conftest3.s
2699   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2700      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2701      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2702      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2703         conftest2.o conftest3.o > /dev/null 2>&1; then
2704     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2705                          | sed -e '/myfoosect/!d' -e N`
2706     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2707       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2708         gcc_cv_ld_ro_rw_mix=read-only
2709       else
2710         gcc_cv_ld_ro_rw_mix=read-write
2711       fi
2712     fi
2713   fi
2714 changequote(,)dnl
2715   rm -f conftest.* conftest[123].*
2716 changequote([,])dnl
2717 fi
2718 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2719         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2720   [Define if your linker links a mix of read-only
2721    and read-write sections into a read-write section.])
2722 fi
2723 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2724
2725 gcc_AC_INITFINI_ARRAY
2726
2727 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2728 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2729   [elf,2,11,0],,
2730 [       .data
2731         .uleb128 L2 - L1
2732 L1:
2733         .uleb128 1280
2734         .sleb128 -1010
2735 L2:],
2736 [[# GAS versions before 2.11 do not support uleb128,
2737   # despite appearing to.
2738   # ??? There exists an elf-specific test that will crash
2739   # the assembler.  Perhaps it's better to figure out whether
2740   # arbitrary sections are supported and try the test.
2741   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2742   if echo "$as_ver" | grep GNU > /dev/null; then
2743     as_vers=`echo $as_ver | sed -n \
2744         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2745     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2746     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2747     if test $as_major -eq 2 && test $as_minor -lt 11
2748     then :
2749     else gcc_cv_as_leb128=yes
2750     fi
2751   fi]],
2752   [AC_DEFINE(HAVE_AS_LEB128, 1,
2753     [Define if your assembler supports .sleb128 and .uleb128.])],
2754   [AC_DEFINE(HAVE_AS_LEB128, 0,
2755     [Define if your assembler supports .sleb128 and .uleb128.])])
2756
2757 # Check if we have assembler support for unwind directives.
2758 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2759   ,,
2760 [       .text
2761         .cfi_startproc
2762         .cfi_offset 0, 0
2763         .cfi_same_value 1
2764         .cfi_def_cfa 1, 2
2765         .cfi_escape 1, 2, 3, 4, 5
2766         .cfi_endproc],
2767 [case "$target" in
2768   *-*-solaris*)
2769     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2770     # read-only and read-write sections, we need to make sure that the
2771     # assembler used emits read-write .eh_frame sections.
2772     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2773       if test "x$gcc_cv_objdump" != x; then
2774         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2775                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2776           gcc_cv_as_cfi_directive=no
2777         else
2778           case "$target" in
2779             i?86-*-solaris2.1[[0-9]]* | x86_64-*-solaris2.1[[0-9]]*)
2780               # On Solaris/x86, make sure that GCC and assembler agree on using
2781               # read-only .eh_frame sections for 64-bit.
2782               if test x$gas = xyes; then
2783                  as_ix86_64_opt="--64"
2784               else
2785                  as_ix86_64_opt="-xarch=amd64"
2786               fi
2787               if $gcc_cv_as $as_ix86_64_opt -o conftest.o conftest.s > /dev/null 2>&1 && \
2788                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2789                         sed -e /.eh_frame/!d -e N | \
2790                         grep READONLY > /dev/null; then
2791                 gcc_cv_as_cfi_directive=yes
2792               else
2793                 gcc_cv_as_cfi_directive=no
2794               fi
2795               ;;
2796             *)
2797               gcc_cv_as_cfi_directive=yes
2798               ;;
2799           esac
2800         fi
2801       else
2802         # no objdump, err on the side of caution
2803         gcc_cv_as_cfi_directive=no
2804       fi
2805     else
2806       gcc_cv_as_cfi_directive=yes
2807     fi
2808     ;;
2809   *-*-*)
2810     gcc_cv_as_cfi_directive=yes
2811     ;;
2812 esac])
2813 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2814 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2815   ,,
2816 [       .text
2817         .cfi_startproc
2818         .cfi_adjust_cfa_offset 64
2819         .skip 75040, 0
2820         .cfi_adjust_cfa_offset 128
2821         .cfi_endproc],
2822 [[
2823 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2824     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2825    gcc_cv_as_cfi_advance_working=yes
2826 fi
2827 ]])
2828 else
2829   # no objdump, err on the side of caution
2830   gcc_cv_as_cfi_advance_working=no
2831 fi
2832 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2833 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2834   [`if test $gcc_cv_as_cfi_directive = yes \
2835        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2836   [Define 0/1 if your assembler supports CFI directives.])
2837
2838 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2839 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2840   gcc_cv_as_cfi_personality_directive, ,,
2841 [       .text
2842         .cfi_startproc
2843         .cfi_personality 0, symbol
2844         .cfi_endproc])
2845 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2846   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2847     then echo 1; else echo 0; fi`],
2848   [Define 0/1 if your assembler supports .cfi_personality.])
2849
2850 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2851   gcc_cv_as_cfi_sections_directive, ,,
2852 [       .text
2853         .cfi_sections .debug_frame, .eh_frame
2854         .cfi_startproc
2855         .cfi_endproc],
2856 [case $target_os in
2857   win32 | pe | cygwin* | mingw32*)
2858     # Need to check that we generated the correct relocation for the
2859     # .debug_frame section.  This was fixed for binutils 2.21.
2860     gcc_cv_as_cfi_sections_directive=no
2861     if test "x$gcc_cv_objdump" != x; then
2862      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2863         grep secrel > /dev/null; then
2864       gcc_cv_as_cfi_sections_directive=yes
2865      fi
2866     fi
2867     ;;
2868   *)
2869     gcc_cv_as_cfi_sections_directive=yes
2870     ;;
2871 esac])
2872 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2873 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2874   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2875     then echo 1; else echo 0; fi`],
2876   [Define 0/1 if your assembler supports .cfi_sections.])
2877
2878 # GAS versions up to and including 2.11.0 may mis-optimize
2879 # .eh_frame data.
2880 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2881   [elf,2,12,0],,
2882 [       .text
2883 .LFB1:
2884         .4byte  0
2885 .L1:
2886         .4byte  0
2887 .LFE1:
2888         .section        .eh_frame,"aw",@progbits
2889 __FRAME_BEGIN__:
2890         .4byte  .LECIE1-.LSCIE1
2891 .LSCIE1:
2892         .4byte  0x0
2893         .byte   0x1
2894         .ascii "z\0"
2895         .byte   0x1
2896         .byte   0x78
2897         .byte   0x1a
2898         .byte   0x0
2899         .byte   0x4
2900         .4byte  1
2901         .p2align 1
2902 .LECIE1:
2903 .LSFDE1:
2904         .4byte  .LEFDE1-.LASFDE1
2905 .LASFDE1:
2906         .4byte  .LASFDE1-__FRAME_BEGIN__
2907         .4byte  .LFB1
2908         .4byte  .LFE1-.LFB1
2909         .byte   0x4
2910         .4byte  .LFE1-.LFB1
2911         .byte   0x4
2912         .4byte  .L1-.LFB1
2913 .LEFDE1:],
2914 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2915 cat > conftest.lit <<EOF
2916  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2917  0010 01000000 12000000 18000000 00000000  ................
2918  0020 08000000 04080000 0044               .........D      @&t@
2919 EOF
2920 cat > conftest.big <<EOF
2921  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2922  0010 00000001 00000012 00000018 00000000  ................
2923  0020 00000008 04000000 0844               .........D      @&t@
2924 EOF
2925   # If the assembler didn't choke, and we can objdump,
2926   # and we got the correct data, then succeed.
2927   # The text in the here-document typically retains its unix-style line
2928   # endings, while the output of objdump will use host line endings.
2929   # Therefore, use diff -b for the comparisons.
2930   if test x$gcc_cv_objdump != x \
2931   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2932      | tail -3 > conftest.got \
2933   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2934     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2935   then
2936     gcc_cv_as_eh_frame=yes
2937   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2938     gcc_cv_as_eh_frame=buggy
2939   else
2940     # Uh oh, what do we do now?
2941     gcc_cv_as_eh_frame=no
2942   fi])
2943
2944 if test $gcc_cv_as_eh_frame = buggy; then
2945   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2946   [Define if your assembler mis-optimizes .eh_frame data.])
2947 fi
2948
2949 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2950  [elf,2,12,0], [--fatal-warnings],
2951  [.section .rodata.str, "aMS", @progbits, 1])
2952 if test $gcc_cv_as_shf_merge = no; then
2953   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2954     [elf,2,12,0], [--fatal-warnings],
2955     [.section .rodata.str, "aMS", %progbits, 1])
2956 fi
2957 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2958   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2959 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2960
2961 gcc_GAS_CHECK_FEATURE([stabs directive], gcc_cv_as_stabs_directive, ,,
2962 [.stabs "gcc2_compiled.",60,0,0,0],,
2963 [AC_DEFINE(HAVE_AS_STABS_DIRECTIVE, 1,
2964   [Define if your assembler supports .stabs.])])
2965
2966 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
2967  gcc_cv_as_comdat_group,
2968  [elf,2,16,0], [--fatal-warnings],
2969  [.section .text,"axG",@progbits,.foo,comdat])
2970 if test $gcc_cv_as_comdat_group = yes; then
2971   gcc_cv_as_comdat_group_percent=no
2972   gcc_cv_as_comdat_group_group=no
2973 else
2974  gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
2975    gcc_cv_as_comdat_group_percent,
2976    [elf,2,16,0], [--fatal-warnings],
2977    [.section .text,"axG",%progbits,.foo,comdat])
2978  if test $gcc_cv_as_comdat_group_percent = yes; then
2979    gcc_cv_as_comdat_group_group=no
2980  else
2981    case "${target}" in
2982      # Sun as uses a completely different syntax.
2983      *-*-solaris2*)
2984        case "${target}" in
2985          sparc*-*-solaris2*)
2986            conftest_s='
2987                .group foo,".text%foo",#comdat
2988                .section ".text%foo", #alloc,#execinstr,#progbits
2989                .globl foo
2990              foo:
2991              '
2992            ;;
2993          i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
2994            conftest_s='
2995                .group foo,.text%foo,#comdat
2996                .section .text%foo, "ax", @progbits
2997                .globl  foo
2998              foo:
2999              '
3000            ;;
3001        esac
3002        gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
3003          gcc_cv_as_comdat_group_group,
3004          ,, [$conftest_s])
3005        ;;
3006    esac
3007    if test -z "${gcc_cv_as_comdat_group_group+set}"; then
3008      gcc_cv_as_comdat_group_group=no
3009    fi
3010  fi
3011 fi
3012 if test x"$ld_is_gold" = xyes; then
3013   comdat_group=yes
3014 elif test $in_tree_ld = yes ; then
3015   comdat_group=no
3016   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3017      && test $in_tree_ld_is_elf = yes; then
3018      comdat_group=yes
3019   fi
3020 elif echo "$ld_ver" | grep GNU > /dev/null; then
3021   comdat_group=yes
3022   if test 0"$ld_date" -lt 20050308; then
3023     if test -n "$ld_date"; then
3024       # If there was date string, but was earlier than 2005-03-08, fail
3025       comdat_group=no
3026     elif test "$ld_vers_major" -lt 2; then
3027       comdat_group=no
3028     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
3029       comdat_group=no
3030     fi
3031   fi
3032 else
3033 changequote(,)dnl
3034   case "${target}" in
3035     *-*-solaris2.1[1-9]*)
3036       comdat_group=no
3037       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
3038       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
3039       # version 1.688.
3040       #
3041       # If using Sun as for COMDAT group as emitted by GCC, one needs at
3042       # least ld version 1.2267.
3043       if test "$ld_vers_major" -gt 1; then
3044         comdat_group=yes
3045       elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
3046         comdat_group=yes
3047       elif test "$ld_vers_minor" -ge 2267; then
3048         comdat_group=yes
3049       fi
3050       ;;
3051     *)
3052       # Assume linkers other than GNU ld don't support COMDAT group.
3053       comdat_group=no
3054       ;;
3055   esac
3056 changequote([,])dnl
3057 fi
3058 # Allow overriding the automatic COMDAT group tests above.
3059 AC_ARG_ENABLE(comdat,
3060   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
3061   [comdat_group="$enable_comdat"])
3062 if test $comdat_group = no; then
3063   gcc_cv_as_comdat_group=no
3064   gcc_cv_as_comdat_group_percent=no
3065   gcc_cv_as_comdat_group_group=no
3066 fi
3067 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
3068   [`if test $gcc_cv_as_comdat_group = yes \
3069     || test $gcc_cv_as_comdat_group_percent = yes \
3070     || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
3071 [Define 0/1 if your assembler and linker support COMDAT groups.])
3072
3073 gcc_GAS_CHECK_FEATURE([line table discriminator support],
3074  gcc_cv_as_discriminator,
3075  [2,19,51],,
3076 [       .text
3077         .file 1 "conf.c"
3078         .loc 1 1 0 discriminator 1],,
3079 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
3080   [Define if your assembler supports the .loc discriminator sub-directive.])])
3081
3082 # Thread-local storage - the check is heavily parameterized.
3083 conftest_s=
3084 tls_first_major=
3085 tls_first_minor=
3086 tls_as_opt=
3087 case "$target" in
3088 changequote(,)dnl
3089   alpha*-*-*)
3090     conftest_s='
3091         .section ".tdata","awT",@progbits
3092 foo:    .long   25
3093         .text
3094         ldq     $27,__tls_get_addr($29)         !literal!1
3095         lda     $16,foo($29)                    !tlsgd!1
3096         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
3097         ldq     $27,__tls_get_addr($29)         !literal!2
3098         lda     $16,foo($29)                    !tlsldm!2
3099         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
3100         ldq     $1,foo($29)                     !gotdtprel
3101         ldah    $2,foo($29)                     !dtprelhi
3102         lda     $3,foo($2)                      !dtprello
3103         lda     $4,foo($29)                     !dtprel
3104         ldq     $1,foo($29)                     !gottprel
3105         ldah    $2,foo($29)                     !tprelhi
3106         lda     $3,foo($2)                      !tprello
3107         lda     $4,foo($29)                     !tprel'
3108         tls_first_major=2
3109         tls_first_minor=13
3110         tls_as_opt=--fatal-warnings
3111         ;;
3112   arc*-*-*)
3113     conftest_s='
3114         add_s r0,r0, @foo@tpoff'
3115         tls_first_major=2
3116         tls_first_minor=23
3117         ;;
3118   cris-*-*|crisv32-*-*)
3119     conftest_s='
3120         .section ".tdata","awT",@progbits
3121 x:      .long   25
3122         .text
3123         move.d x:IE,$r10
3124         nop'
3125         tls_first_major=2
3126         tls_first_minor=20
3127         tls_as_opt=--fatal-warnings
3128         ;;
3129   frv*-*-*)
3130     conftest_s='
3131         .section ".tdata","awT",@progbits
3132 x:      .long   25
3133         .text
3134         call    #gettlsoff(x)'
3135         tls_first_major=2
3136         tls_first_minor=14
3137         ;;
3138   hppa*-*-linux*)
3139     conftest_s='
3140 t1:     .reg    %r20
3141 t2:     .reg    %r21
3142 gp:     .reg    %r19
3143         .section ".tdata","awT",@progbits
3144 foo:    .long   25
3145         .text
3146         .align  4
3147         addil LT%foo-$tls_gdidx$,gp
3148         ldo RT%foo-$tls_gdidx$(%r1),%arg0
3149         b __tls_get_addr
3150         nop
3151         addil LT%foo-$tls_ldidx$,gp
3152         b __tls_get_addr
3153         ldo RT%foo-$tls_ldidx$(%r1),%arg0
3154         addil LR%foo-$tls_dtpoff$,%ret0
3155         ldo RR%foo-$tls_dtpoff$(%r1),%t1
3156         mfctl %cr27,%t1
3157         addil LT%foo-$tls_ieoff$,gp
3158         ldw RT%foo-$tls_ieoff$(%r1),%t2
3159         add %t1,%t2,%t3
3160         mfctl %cr27,%t1
3161         addil LR%foo-$tls_leoff$,%t1
3162         ldo RR%foo-$tls_leoff$(%r1),%t2'
3163         tls_first_major=2
3164         tls_first_minor=15
3165         tls_as_opt=--fatal-warnings
3166         ;;
3167   arm*-*-*)
3168     conftest_s='
3169         .section ".tdata","awT",%progbits
3170 foo:    .long   25
3171         .text
3172 .word foo(gottpoff)
3173 .word foo(tpoff)
3174 .word foo(tlsgd)
3175 .word foo(tlsldm)
3176 .word foo(tlsldo)'
3177         tls_first_major=2
3178         tls_first_minor=17
3179         ;;
3180   i[34567]86-*-* | x86_64-*-*)
3181     case "$target" in
3182       i[34567]86-*-solaris2.* | x86_64-*-solaris2.1[0-9]*)
3183         on_solaris=yes
3184         ;;
3185       *)
3186         on_solaris=no
3187         ;;
3188     esac
3189     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3190       conftest_s='
3191         .section .tdata,"awt",@progbits'
3192       tls_first_major=0
3193       tls_first_minor=0
3194       tls_section_flag=t
3195 changequote([,])dnl
3196       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
3197 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
3198 changequote(,)dnl
3199     else
3200       conftest_s='
3201         .section ".tdata","awT",@progbits'
3202       tls_first_major=2
3203       tls_first_minor=14
3204       tls_section_flag=T
3205       tls_as_opt="--fatal-warnings"
3206     fi
3207     case "$target" in
3208       i[34567]86-*-*)
3209         conftest_s="$conftest_s
3210 foo:    .long   25
3211         .text
3212         movl    %gs:0, %eax
3213         leal    foo@tlsgd(,%ebx,1), %eax
3214         leal    foo@tlsldm(%ebx), %eax
3215         leal    foo@dtpoff(%eax), %edx
3216         movl    foo@gottpoff(%ebx), %eax
3217         subl    foo@gottpoff(%ebx), %eax
3218         addl    foo@gotntpoff(%ebx), %eax
3219         movl    foo@indntpoff, %eax
3220         movl    \$foo@tpoff, %eax
3221         subl    \$foo@tpoff, %eax
3222         leal    foo@ntpoff(%ecx), %eax"
3223         ;;
3224       x86_64-*-*)
3225         if test x$on_solaris = xyes; then
3226           case $gas_flag in
3227             yes) tls_as_opt="$tls_as_opt --64" ;;
3228             no)  tls_as_opt="$tls_as_opt -xarch=amd64" ;;
3229           esac
3230         fi
3231         conftest_s="$conftest_s
3232 foo:    .long   25
3233         .text
3234         movq    %fs:0, %rax
3235         leaq    foo@tlsgd(%rip), %rdi
3236         leaq    foo@tlsld(%rip), %rdi
3237         leaq    foo@dtpoff(%rax), %rdx
3238         movq    foo@gottpoff(%rip), %rax
3239         movq    \$foo@tpoff, %rax"
3240         ;;
3241     esac
3242     ;;
3243   ia64-*-*)
3244     conftest_s='
3245         .section ".tdata","awT",@progbits
3246 foo:    data8   25
3247         .text
3248         addl    r16 = @ltoff(@dtpmod(foo#)), gp
3249         addl    r17 = @ltoff(@dtprel(foo#)), gp
3250         addl    r18 = @ltoff(@tprel(foo#)), gp
3251         addl    r19 = @dtprel(foo#), gp
3252         adds    r21 = @dtprel(foo#), r13
3253         movl    r23 = @dtprel(foo#)
3254         addl    r20 = @tprel(foo#), gp
3255         adds    r22 = @tprel(foo#), r13
3256         movl    r24 = @tprel(foo#)'
3257         tls_first_major=2
3258         tls_first_minor=13
3259         tls_as_opt=--fatal-warnings
3260         ;;
3261   microblaze*-*-*)
3262     conftest_s='
3263         .section .tdata,"awT",@progbits
3264 x:
3265         .word 2
3266         .text
3267         addik r5,r20,x@TLSGD
3268         addik r5,r20,x@TLSLDM'
3269         tls_first_major=2
3270         tls_first_minor=20
3271         tls_as_opt='--fatal-warnings'
3272         ;;
3273   mips*-*-*)
3274     conftest_s='
3275         .section .tdata,"awT",@progbits
3276 x:
3277         .word 2
3278         .text
3279         addiu $4, $28, %tlsgd(x)
3280         addiu $4, $28, %tlsldm(x)
3281         lui $4, %dtprel_hi(x)
3282         addiu $4, $4, %dtprel_lo(x)
3283         lw $4, %gottprel(x)($28)
3284         lui $4, %tprel_hi(x)
3285         addiu $4, $4, %tprel_lo(x)'
3286         tls_first_major=2
3287         tls_first_minor=16
3288         tls_as_opt='-32 --fatal-warnings'
3289         ;;
3290   m68k-*-*)
3291     conftest_s='
3292         .section .tdata,"awT",@progbits
3293 x:
3294         .word 2
3295         .text
3296 foo:
3297         move.l x@TLSGD(%a5),%a0
3298         move.l x@TLSLDM(%a5),%a0
3299         move.l x@TLSLDO(%a5),%a0
3300         move.l x@TLSIE(%a5),%a0
3301         move.l x@TLSLE(%a5),%a0'
3302         tls_first_major=2
3303         tls_first_minor=19
3304         tls_as_opt='--fatal-warnings'
3305         ;;
3306   nios2-*-*)
3307       conftest_s='
3308         .section ".tdata","awT",@progbits'
3309         tls_first_major=2
3310         tls_first_minor=23
3311         tls_as_opt="--fatal-warnings"
3312         ;;
3313   aarch64*-*-*)
3314     conftest_s='
3315         .section ".tdata","awT",%progbits
3316 foo:    .long   25
3317         .text
3318         adrp  x0, :tlsgd:x
3319         add   x0, x0, #:tlsgd_lo12:x
3320         bl    __tls_get_addr
3321         nop'
3322         tls_first_major=2
3323         tls_first_minor=20
3324         tls_as_opt='--fatal-warnings'
3325         ;;
3326   powerpc-ibm-aix*)
3327     conftest_s='
3328         .extern __get_tpointer
3329         .toc
3330 LC..1:
3331         .tc a[TC],a[TL]@le
3332         .csect .text[PR]
3333 .tlstest:
3334         lwz 9,LC..1(2)
3335         bla __get_tpointer
3336         lwzx 3,9,3
3337         .globl a
3338         .csect a[TL],4
3339 a:
3340         .space 4'
3341         tls_first_major=0
3342         tls_first_minor=0
3343         ;;
3344   powerpc64*-*-*)
3345     conftest_s='
3346         .section ".tdata","awT",@progbits
3347         .align 3
3348 ld0:    .space 8
3349 ld1:    .space 8
3350 x1:     .space 8
3351 x2:     .space 8
3352 x3:     .space 8
3353         .text
3354         addi 3,2,ld0@got@tlsgd
3355         bl .__tls_get_addr
3356         nop
3357         addi 3,2,ld1@toc
3358         bl .__tls_get_addr
3359         nop
3360         addi 3,2,x1@got@tlsld
3361         bl .__tls_get_addr
3362         nop
3363         addi 9,3,x1@dtprel
3364         bl .__tls_get_addr
3365         nop
3366         addis 9,3,x2@dtprel@ha
3367         addi 9,9,x2@dtprel@l
3368         bl .__tls_get_addr
3369         nop
3370         ld 9,x3@got@dtprel(2)
3371         add 9,9,3
3372         bl .__tls_get_addr
3373         nop'
3374         tls_first_major=2
3375         tls_first_minor=14
3376         tls_as_opt="-a64 --fatal-warnings"
3377         ;;
3378   powerpc*-*-*)
3379     conftest_s='
3380         .section ".tdata","awT",@progbits
3381         .align 2
3382 ld0:    .space 4
3383 ld1:    .space 4
3384 x1:     .space 4
3385 x2:     .space 4
3386 x3:     .space 4
3387         .text
3388         addi 3,31,ld0@got@tlsgd
3389         bl __tls_get_addr
3390         addi 3,31,x1@got@tlsld
3391         bl __tls_get_addr
3392         addi 9,3,x1@dtprel
3393         addis 9,3,x2@dtprel@ha
3394         addi 9,9,x2@dtprel@l
3395         lwz 9,x3@got@tprel(31)
3396         add 9,9,x@tls
3397         addi 9,2,x1@tprel
3398         addis 9,2,x2@tprel@ha
3399         addi 9,9,x2@tprel@l'
3400         tls_first_major=2
3401         tls_first_minor=14
3402         tls_as_opt="-a32 --fatal-warnings"
3403         ;;
3404   riscv*-*-*)
3405     conftest_s='
3406         .section .tdata,"awT",@progbits
3407 x:      .word 2
3408         .text
3409         la.tls.gd a0,x
3410         call __tls_get_addr'
3411         tls_first_major=2
3412         tls_first_minor=21
3413         tls_as_opt='--fatal-warnings'
3414         ;;
3415   s390-*-*)
3416     conftest_s='
3417         .section ".tdata","awT",@progbits
3418 foo:    .long   25
3419         .text
3420         .long   foo@TLSGD
3421         .long   foo@TLSLDM
3422         .long   foo@DTPOFF
3423         .long   foo@NTPOFF
3424         .long   foo@GOTNTPOFF
3425         .long   foo@INDNTPOFF
3426         l       %r1,foo@GOTNTPOFF(%r12)
3427         l       %r1,0(%r1):tls_load:foo
3428         bas     %r14,0(%r1,%r13):tls_gdcall:foo
3429         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
3430         tls_first_major=2
3431         tls_first_minor=14
3432         tls_as_opt="-m31 --fatal-warnings"
3433         ;;
3434   s390x-*-*)
3435     conftest_s='
3436         .section ".tdata","awT",@progbits
3437 foo:    .long   25
3438         .text
3439         .quad   foo@TLSGD
3440         .quad   foo@TLSLDM
3441         .quad   foo@DTPOFF
3442         .quad   foo@NTPOFF
3443         .quad   foo@GOTNTPOFF
3444         lg      %r1,foo@GOTNTPOFF(%r12)
3445         larl    %r1,foo@INDNTPOFF
3446         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
3447         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
3448         tls_first_major=2
3449         tls_first_minor=14
3450         tls_as_opt="-m64 -Aesame --fatal-warnings"
3451         ;;
3452   sh-*-* | sh[123456789lbe]*-*-*)
3453     conftest_s='
3454         .section ".tdata","awT",@progbits
3455 foo:    .long   25
3456         .text
3457         .long   foo@TLSGD
3458         .long   foo@TLSLDM
3459         .long   foo@DTPOFF
3460         .long   foo@GOTTPOFF
3461         .long   foo@TPOFF'
3462         tls_first_major=2
3463         tls_first_minor=13
3464         tls_as_opt=--fatal-warnings
3465         ;;
3466   sparc*-*-*)
3467     case "$target" in
3468       sparc*-sun-solaris2.*)
3469         on_solaris=yes
3470         ;;
3471       *)
3472         on_solaris=no
3473         ;;
3474     esac
3475     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3476       conftest_s='
3477         .section ".tdata",#alloc,#write,#tls'
3478         tls_first_major=0
3479         tls_first_minor=0
3480     else
3481       conftest_s='
3482         .section ".tdata","awT",@progbits'
3483         tls_first_major=2
3484         tls_first_minor=14
3485         tls_as_opt="-32 --fatal-warnings"
3486     fi
3487     conftest_s="$conftest_s
3488 foo:    .long   25
3489         .text
3490         sethi   %tgd_hi22(foo), %o0
3491         add     %o0, %tgd_lo10(foo), %o1
3492         add     %l7, %o1, %o0, %tgd_add(foo)
3493         call    __tls_get_addr, %tgd_call(foo)
3494         sethi   %tldm_hi22(foo), %l1
3495         add     %l1, %tldm_lo10(foo), %l2
3496         add     %l7, %l2, %o0, %tldm_add(foo)
3497         call    __tls_get_addr, %tldm_call(foo)
3498         sethi   %tldo_hix22(foo), %l3
3499         xor     %l3, %tldo_lox10(foo), %l4
3500         add     %o0, %l4, %l5, %tldo_add(foo)
3501         sethi   %tie_hi22(foo), %o3
3502         add     %o3, %tie_lo10(foo), %o3
3503         ld      [%l7 + %o3], %o2, %tie_ld(foo)
3504         add     %g7, %o2, %o4, %tie_add(foo)
3505         sethi   %tle_hix22(foo), %l1
3506         xor     %l1, %tle_lox10(foo), %o5
3507         ld      [%g7 + %o5], %o1"
3508         ;;
3509   tilepro*-*-*)
3510       conftest_s='
3511         .section ".tdata","awT",@progbits
3512 foo:    .long   25
3513         .text
3514         addli   r0, zero, tls_gd(foo)
3515         auli    r0, zero, tls_gd_ha16(foo)
3516         addli   r0, r0, tls_gd_lo16(foo)
3517         jal     __tls_get_addr
3518         addli   r0, zero, tls_ie(foo)
3519         auli    r0, r0, tls_ie_ha16(foo)
3520         addli   r0, r0, tls_ie_lo16(foo)'
3521         tls_first_major=2
3522         tls_first_minor=22
3523         tls_as_opt="--fatal-warnings"
3524         ;;
3525   tilegx*-*-*)
3526       conftest_s='
3527         .section ".tdata","awT",@progbits
3528 foo:    .long   25
3529         .text
3530         shl16insli r0, zero, hw0_last_tls_gd(foo)
3531         shl16insli r0, zero, hw1_last_tls_gd(foo)
3532         shl16insli r0, r0,   hw0_tls_gd(foo)
3533         jal        __tls_get_addr
3534         shl16insli r0, zero, hw1_last_tls_ie(foo)
3535         shl16insli r0, r0,   hw0_tls_ie(foo)'
3536         tls_first_major=2
3537         tls_first_minor=22
3538         tls_as_opt="--fatal-warnings"
3539         ;;
3540   xtensa*-*-*)
3541     conftest_s='
3542         .section ".tdata","awT",@progbits
3543 foo:    .long   25
3544         .text
3545         movi    a8, foo@TLSFUNC
3546         movi    a10, foo@TLSARG
3547         callx8.tls a8, foo@TLSCALL'
3548         tls_first_major=2
3549         tls_first_minor=19
3550         ;;
3551 changequote([,])dnl
3552 esac
3553 set_have_as_tls=no
3554 if test "x$enable_tls" = xno ; then
3555   : # TLS explicitly disabled.
3556 elif test "x$enable_tls" = xyes ; then
3557   set_have_as_tls=yes # TLS explicitly enabled.
3558 elif test -z "$tls_first_major"; then
3559   : # If we don't have a check, assume no support.
3560 else
3561   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3562   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3563   [set_have_as_tls=yes])
3564 fi
3565 if test $set_have_as_tls = yes ; then
3566   AC_DEFINE(HAVE_AS_TLS, 1,
3567             [Define if your assembler and linker support thread-local storage.])
3568 fi
3569
3570 # Target-specific assembler checks.
3571
3572 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3573 gcc_cv_ld_static_dynamic=no
3574 gcc_cv_ld_static_option='-Bstatic'
3575 gcc_cv_ld_dynamic_option='-Bdynamic'
3576 if test $in_tree_ld = yes ; then
3577   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3578     gcc_cv_ld_static_dynamic=yes
3579   fi
3580 elif test x$gcc_cv_ld != x; then
3581   # Check if linker supports -Bstatic/-Bdynamic option
3582   if $gcc_cv_ld --help 2>&1 | grep -- -Bstatic > /dev/null \
3583      && $gcc_cv_ld --help 2>&1 | grep -- -Bdynamic > /dev/null; then
3584       gcc_cv_ld_static_dynamic=yes
3585   else
3586     case "$target" in
3587       # AIX ld uses -b flags
3588       *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
3589         gcc_cv_ld_static_dynamic=yes
3590         gcc_cv_ld_static_option="-bstatic"
3591         gcc_cv_ld_dynamic_option="-bdynamic"
3592         ;;
3593       # HP-UX ld uses -a flags to select between shared and archive.
3594       *-*-hpux*)
3595         if test x"$gnu_ld" = xno; then
3596           gcc_cv_ld_static_dynamic=yes
3597           gcc_cv_ld_static_option="-aarchive_shared"
3598           gcc_cv_ld_dynamic_option="-adefault"
3599         fi
3600         ;;
3601       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3602       *-*-solaris2*)
3603         gcc_cv_ld_static_dynamic=yes
3604         ;;
3605     esac
3606   fi
3607 fi
3608 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3609         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3610 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3611         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3612 [Define to the linker option to disable use of shared objects.])
3613         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3614 [Define to the linker option to enable use of shared objects.])
3615 fi
3616 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3617
3618 if test x"$demangler_in_ld" = xyes; then
3619   AC_MSG_CHECKING(linker --demangle support)
3620   gcc_cv_ld_demangle=no
3621   if test $in_tree_ld = yes; then
3622     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3623       gcc_cv_ld_demangle=yes
3624     fi
3625   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3626     # Check if the GNU linker supports --demangle option
3627     if $gcc_cv_ld --help 2>&1 | grep no-demangle > /dev/null; then
3628       gcc_cv_ld_demangle=yes
3629     fi
3630   fi
3631   if test x"$gcc_cv_ld_demangle" = xyes; then
3632     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3633 [Define if your linker supports --demangle option.])
3634   fi
3635   AC_MSG_RESULT($gcc_cv_ld_demangle)
3636 fi
3637
3638 AC_MSG_CHECKING(linker plugin support)
3639 gcc_cv_lto_plugin=0
3640 if test -f liblto_plugin.la; then
3641   save_ld_ver="$ld_ver"
3642   save_ld_vers_major="$ld_vers_major"
3643   save_ld_vers_minor="$ld_vers_minor"
3644   save_ld_is_gold="$ld_is_gold"
3645
3646   ld_is_gold=no
3647
3648   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
3649     ld_ver="GNU ld"
3650     # FIXME: ld_is_gold?
3651     ld_vers_major="$gcc_cv_gld_major_version"
3652     ld_vers_minor="$gcc_cv_gld_minor_version"
3653   else
3654     # Determine plugin linker version.
3655     # FIXME: Partial duplicate from above, generalize.
3656 changequote(,)dnl
3657     ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
3658     if echo "$ld_ver" | grep GNU > /dev/null; then
3659       if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
3660         ld_is_gold=yes
3661         ld_vers=`echo $ld_ver | sed -n \
3662             -e 's,^[^)]*[        ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3663       else
3664         ld_vers=`echo $ld_ver | sed -n \
3665             -e 's,^.*[   ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3666       fi
3667       ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3668       ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3669     fi
3670 changequote([,])dnl
3671   fi
3672
3673   # Determine plugin support.
3674   if echo "$ld_ver" | grep GNU > /dev/null; then
3675     # Require GNU ld or gold 2.21+ for plugin support by default.
3676     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
3677       gcc_cv_lto_plugin=2
3678     # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
3679     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
3680       gcc_cv_lto_plugin=1
3681     fi
3682   fi
3683
3684   ld_ver="$save_ld_ver"
3685   ld_vers_major="$save_ld_vers_major"
3686   ld_vers_minor="$save_ld_vers_minor"
3687   ld_is_gold="$save_ld_is_gold"
3688 fi
3689 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
3690   [Define to the level of your linker's plugin support.])
3691 AC_MSG_RESULT($gcc_cv_lto_plugin)
3692
3693 # Target OS-specific assembler checks.
3694
3695 case "$target_os" in
3696   darwin*)
3697     gcc_GAS_CHECK_FEATURE([-mmacosx-version-min option],
3698       gcc_cv_as_mmacosx_version_min,,
3699       [-mmacosx-version-min=10.1], [.text],,
3700       [AC_DEFINE(HAVE_AS_MMACOSX_VERSION_MIN_OPTION, 1,
3701         [Define if your Mac OS X assembler supports the -mmacos-version-min option.])])
3702     ;;
3703 esac
3704
3705 # Target CPU-specific assembler checks.
3706
3707 case "$target" in
3708   aarch64*-*-*)
3709     gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,,
3710                           [-mabi=lp64], [.text],,,)
3711     if test x$gcc_cv_as_aarch64_mabi = xyes; then
3712       AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
3713                 [Define if your assembler supports the -mabi option.])
3714     else
3715       if test x$with_abi = xilp32; then
3716         AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3717                      Upgrade the Assembler.])
3718       fi
3719       if test x"$with_multilib_list" = xdefault; then
3720         TM_MULTILIB_CONFIG=lp64
3721       else
3722         aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
3723         for aarch64_multilib in ${aarch64_multilibs}; do
3724           case ${aarch64_multilib} in
3725             ilp32)
3726               AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3727                             Upgrade the Assembler.])
3728               ;;
3729             *)
3730               ;;
3731           esac
3732         done
3733       fi
3734     fi
3735     # Check if we have binutils support for relocations types needed by -fpic
3736     gcc_GAS_CHECK_FEATURE([-fpic relocs], gcc_cv_as_aarch64_picreloc,,,
3737     [
3738         .text
3739         ldr     x0, [[x2, #:gotpage_lo15:globalsym]]
3740     ],,[AC_DEFINE(HAVE_AS_SMALL_PIC_RELOCS, 1,
3741         [Define if your assembler supports relocs needed by -fpic.])])
3742     # Enable default workaround for AArch64 Cortex-A53 erratum 835769.
3743     AC_ARG_ENABLE(fix-cortex-a53-835769,
3744     [
3745 AS_HELP_STRING([--enable-fix-cortex-a53-835769],
3746         [enable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3747 AS_HELP_STRING([--disable-fix-cortex-a53-835769],
3748         [disable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3749     ],
3750       [
3751         case $enableval in
3752           yes)
3753             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_835769_DEFAULT=1"
3754             ;;
3755           no)
3756             ;;
3757           *)
3758             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-835769.\
3759   Valid choices are 'yes' and 'no'.])
3760             ;;
3761
3762         esac
3763       ],
3764     [])
3765     # Enable default workaround for AArch64 Cortex-A53 erratum 843419.
3766     AC_ARG_ENABLE(fix-cortex-a53-843419,
3767     [
3768 AS_HELP_STRING([--enable-fix-cortex-a53-843419],
3769         [enable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3770 AS_HELP_STRING([--disable-fix-cortex-a53-843419],
3771         [disable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3772     ],
3773       [
3774         case $enableval in
3775           yes)
3776             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_843419_DEFAULT=1"
3777             ;;
3778           no)
3779             ;;
3780           *)
3781             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-843419.\
3782   Valid choices are 'yes' and 'no'.])
3783             ;;
3784
3785         esac
3786       ],
3787     [])
3788     ;;
3789
3790   # All TARGET_ABI_OSF targets.
3791   alpha*-*-linux* | alpha*-*-*bsd*)
3792     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3793         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3794 [       .set nomacro
3795         .text
3796         extbl   $3, $2, $3      !lituse_bytoff!1
3797         ldq     $2, a($29)      !literal!1
3798         ldq     $4, b($29)      !literal!2
3799         ldq_u   $3, 0($2)       !lituse_base!1
3800         ldq     $27, f($29)     !literal!5
3801         jsr     $26, ($27), f   !lituse_jsr!5
3802         ldah    $29, 0($26)     !gpdisp!3
3803         lda     $0, c($29)      !gprel
3804         ldah    $1, d($29)      !gprelhigh
3805         lda     $1, d($1)       !gprellow
3806         lda     $29, 0($29)     !gpdisp!3],,
3807     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3808   [Define if your assembler supports explicit relocations.])])
3809     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3810         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3811 [       .set nomacro
3812         .text
3813         ldq     $27, a($29)     !literal!1
3814         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3815     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3816   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3817     ;;
3818
3819   avr-*-*)
3820     gcc_GAS_CHECK_FEATURE([--mlink-relax option], gcc_cv_as_avr_mlink_relax,,
3821       [--mlink-relax], [.text],,
3822       [AC_DEFINE(HAVE_AS_AVR_MLINK_RELAX_OPTION, 1,
3823                 [Define if your avr assembler supports --mlink-relax option.])])
3824
3825     gcc_GAS_CHECK_FEATURE([-mrmw option], gcc_cv_as_avr_mrmw,,
3826       [-mrmw], [.text],,
3827       [AC_DEFINE(HAVE_AS_AVR_MRMW_OPTION, 1,
3828                 [Define if your avr assembler supports -mrmw option.])])
3829
3830     gcc_GAS_CHECK_FEATURE([__gcc_isr pseudo instruction],
3831       gcc_cv_as_avr_mgccisr,,
3832       [-mgcc-isr], [.text
3833                     __gcc_isr 1
3834                     __gcc_isr 2
3835                     __gcc_isr 0,r24
3836                    ],,
3837       [AC_DEFINE(HAVE_AS_AVR_MGCCISR_OPTION, 1,
3838                 [Define if your avr assembler supports -mgcc-isr option.])])
3839
3840     # Check how default linker description file implements .rodata for
3841     # avrxmega3 (PR21472).  avr-gcc assumes .rodata is *not* loaded to
3842     # RAM so avr-gcc skips __do_copy_data for .rodata objects.
3843     AC_MSG_CHECKING(binutils for avrxmega3 .rodata support)
3844     cat > conftest.s <<EOF
3845         .section .rodata,"a",@progbits
3846         .global xxvaryy
3847     ;; avr-nm should print "... R xxvaryy", not "... D xxvaryy".
3848     xxvaryy:
3849         .word 1
3850 EOF
3851     rm -f conftest.nm
3852     AC_TRY_COMMAND([$gcc_cv_as -mmcu=avrxmega3 conftest.s -o conftest.o])
3853     AC_TRY_COMMAND([$gcc_cv_ld -mavrxmega3 conftest.o -o conftest.elf])
3854     AC_TRY_COMMAND([$gcc_cv_nm conftest.elf > conftest.nm])
3855     if test -s conftest.nm
3856     then
3857         if grep ' R xxvaryy' conftest.nm > /dev/null; then
3858             AC_MSG_RESULT(yes)
3859             AC_DEFINE(HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH, 1,
3860                 [Define if your default avr linker script for avrxmega3 leaves .rodata in flash.])
3861         else
3862             AC_MSG_RESULT(no: avrxmega3 .rodata located in RAM)
3863             echo "$as_me: nm output was" >&AS_MESSAGE_LOG_FD
3864             cat conftest.nm >&AS_MESSAGE_LOG_FD
3865             avr_ld_ver="`$gcc_cv_ld -v | sed -e 's:^.* ::'`"
3866             AC_MSG_WARN([[support for avrxmega3 .rodata in flash needs Binutils 2.29 or higher (have $avr_ld_ver)]])
3867         fi
3868     else
3869         AC_MSG_RESULT(test failed)
3870         echo "$as_me: failed program was" >&AS_MESSAGE_LOG_FD
3871         cat conftest.s >&AS_MESSAGE_LOG_FD
3872         AC_MSG_WARN([[see `config.log' for details]])
3873     fi
3874     rm -f conftest.s conftest.o conftest.elf conftest.nm
3875     ;;
3876
3877   cris-*-*)
3878     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3879       gcc_cv_as_cris_no_mul_bug,[2,15,91],
3880       [-no-mul-bug-abort], [.text],,
3881       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3882                 [Define if your assembler supports the -no-mul-bug-abort option.])])
3883     ;;
3884
3885   sparc*-*-*)
3886     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3887       [.register %g2, #scratch],,
3888       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3889                 [Define if your assembler supports .register.])])
3890
3891     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3892       [-relax], [.text],,
3893       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3894                 [Define if your assembler supports -relax option.])])
3895
3896     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3897       gcc_cv_as_sparc_gotdata_op,,
3898       [-K PIC],
3899 [.text
3900 .align 4
3901 foo:
3902         nop
3903 bar:
3904         sethi %gdop_hix22(foo), %g1
3905         xor    %g1, %gdop_lox10(foo), %g1
3906         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3907       [if test x$gcc_cv_ld != x \
3908        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3909          if test x$gcc_cv_objdump != x; then
3910            if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3911               | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3912                gcc_cv_as_sparc_gotdata_op=no
3913            else
3914                gcc_cv_as_sparc_gotdata_op=yes
3915            fi
3916          fi
3917        fi
3918        rm -f conftest],
3919       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3920                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3921
3922     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3923       gcc_cv_as_sparc_ua_pcrel,,
3924       [-K PIC],
3925 [.text
3926 foo:
3927         nop
3928 .data
3929 .align 4
3930 .byte 0
3931 .uaword %r_disp32(foo)],
3932       [if test x$gcc_cv_ld != x \
3933        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3934          gcc_cv_as_sparc_ua_pcrel=yes
3935        fi
3936        rm -f conftest],
3937       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3938                 [Define if your assembler and linker support unaligned PC relative relocs.])
3939
3940       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3941         gcc_cv_as_sparc_ua_pcrel_hidden,,
3942         [-K PIC],
3943 [.data
3944 .align 4
3945 .byte 0x31
3946 .uaword %r_disp32(foo)
3947 .byte 0x32, 0x33, 0x34
3948 .global foo
3949 .hidden foo
3950 foo:
3951 .skip 4],
3952         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3953          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3954          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3955             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3956             if $gcc_cv_objdump -R conftest 2> /dev/null \
3957                | grep 'DISP32' > /dev/null 2>&1; then
3958                 :
3959             else
3960                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3961             fi
3962          fi
3963          rm -f conftest],
3964          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3965                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3966     ]) # unaligned pcrel relocs
3967
3968     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3969       gcc_cv_as_sparc_offsetable_lo10,,
3970       [-xarch=v9],
3971 [.text
3972         or %g1, %lo(ab) + 12, %g1
3973         or %g1, %lo(ab + 12), %g1],
3974       [if test x$gcc_cv_objdump != x \
3975        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3976           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3977          gcc_cv_as_sparc_offsetable_lo10=yes
3978        fi],
3979        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3980                  [Define if your assembler supports offsetable %lo().])])
3981
3982     gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
3983       gcc_cv_as_sparc_fmaf,,
3984       [-xarch=v9d],
3985       [.text
3986        .register %g2, #scratch
3987        .register %g3, #scratch
3988        .align 4
3989        fmaddd %f0, %f2, %f4, %f6
3990        addxccc %g1, %g2, %g3
3991        fsrl32 %f2, %f4, %f8
3992        fnaddd %f10, %f12, %f14],,
3993       [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
3994                 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
3995
3996     gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
3997       gcc_cv_as_sparc_sparc4,,
3998       [-xarch=sparc4],
3999       [.text
4000        .register %g2, #scratch
4001        .register %g3, #scratch
4002        .align 4
4003        cxbe %g2, %g3, 1f
4004 1:     cwbneg %g2, %g3, 1f
4005 1:     sha1
4006        md5
4007        aes_kexpand0 %f4, %f6, %f8
4008        des_round %f38, %f40, %f42, %f44
4009        camellia_f %f54, %f56, %f58, %f60
4010        kasumi_fi_xor %f46, %f48, %f50, %f52],,
4011       [AC_DEFINE(HAVE_AS_SPARC4, 1,
4012                 [Define if your assembler supports SPARC4 instructions.])])
4013
4014     gcc_GAS_CHECK_FEATURE([SPARC5 and VIS 4.0 instructions],
4015       gcc_cv_as_sparc_sparc5,,
4016       [-xarch=sparc5],
4017       [.text
4018        .register %g2, #scratch
4019        .register %g3, #scratch
4020        .align 4
4021        subxc %g1, %g2, %g3
4022        fpadd8 %f0, %f2, %f4],,
4023       [AC_DEFINE(HAVE_AS_SPARC5_VIS4, 1,
4024                 [Define if your assembler supports SPARC5 and VIS 4.0 instructions.])])
4025
4026     gcc_GAS_CHECK_FEATURE([SPARC6 instructions],
4027       gcc_cv_as_sparc_sparc6,,
4028       [-xarch=sparc6],
4029       [.text
4030        .register %g2, #scratch
4031        .register %g3, #scratch
4032        .align 4
4033        rd %entropy, %g1
4034        fpsll64x %f0, %f2, %f4],,
4035       [AC_DEFINE(HAVE_AS_SPARC6, 1,
4036                 [Define if your assembler supports SPARC6 instructions.])])
4037
4038     gcc_GAS_CHECK_FEATURE([LEON instructions],
4039       gcc_cv_as_sparc_leon,,
4040       [-Aleon],
4041       [.text
4042        .register %g2, #scratch
4043        .register %g3, #scratch
4044        .align 4
4045        smac %g2, %g3, %g1
4046        umac %g2, %g3, %g1
4047        casa [[%g2]] 0xb, %g3, %g1],,
4048       [AC_DEFINE(HAVE_AS_LEON, 1,
4049                 [Define if your assembler supports LEON instructions.])])
4050     ;;
4051
4052 changequote(,)dnl
4053   i[34567]86-*-* | x86_64-*-*)
4054 changequote([,])dnl
4055     case $target_os in
4056       cygwin*)
4057         # Full C++ conformance when using a shared libstdc++-v3 requires some
4058         # support from the Cygwin DLL, which in more recent versions exports
4059         # wrappers to aid in interposing and redirecting operators new, delete,
4060         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
4061         # are configuring for a version of Cygwin that exports the wrappers.
4062         if test x$host = x$target && test x$host_cpu = xi686; then
4063           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
4064         else
4065           # Can't check presence of libc functions during cross-compile, so
4066           # we just have to assume we're building for an up-to-date target.
4067           gcc_ac_cygwin_dll_wrappers=yes
4068         fi
4069         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
4070           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
4071           [Define if you want to generate code by default that assumes that the
4072            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
4073     esac
4074     case $target_os in
4075       cygwin* | pe | mingw32*)
4076         # Recent binutils allows the three-operand form of ".comm" on PE.  This
4077         # definition is used unconditionally to initialise the default state of
4078         # the target option variable that governs usage of the feature.
4079         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
4080          [2,19,52],,[.comm foo,1,32])
4081         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
4082           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
4083           [Define if your assembler supports specifying the alignment
4084            of objects allocated using the GAS .comm command.])
4085         # Used for DWARF 2 in PE
4086         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
4087           gcc_cv_as_ix86_pe_secrel32,
4088           [2,15,91],,
4089 [.text
4090 foo:    nop
4091 .data
4092         .secrel32 foo],
4093           [if test x$gcc_cv_ld != x \
4094            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
4095              gcc_cv_as_ix86_pe_secrel32=yes
4096            fi
4097            rm -f conftest],
4098           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
4099             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
4100         # Test if the assembler supports the extended form of the .section
4101         # directive that specifies section alignment.  LTO support uses this,
4102         # but normally only after installation, so we warn but don't fail the
4103         # configure if LTO is enabled but the assembler does not support it.
4104         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
4105           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
4106         if test x$gcc_cv_as_section_has_align != xyes; then
4107           case ",$enable_languages," in
4108             *,lto,*)
4109               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
4110               ;;
4111           esac
4112         fi
4113         ;;
4114     esac
4115
4116     gcc_GAS_CHECK_FEATURE([-xbrace_comment], gcc_cv_as_ix86_xbrace_comment,,
4117       [-xbrace_comment=no], [.text],,
4118       [AC_DEFINE(HAVE_AS_XBRACE_COMMENT_OPTION, 1,
4119                 [Define if your assembler supports -xbrace_comment option.])])
4120
4121     # Test if the assembler supports the section flag 'e' for specifying
4122     # an excluded section.
4123     gcc_GAS_CHECK_FEATURE([.section with e], gcc_cv_as_section_has_e,
4124       [2,22,51], [--fatal-warnings],
4125 [.section foo1,"e"
4126 .byte 0,0,0,0])
4127     AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
4128       [`if test $gcc_cv_as_section_has_e = yes; then echo 1; else echo 0; fi`],
4129       [Define if your assembler supports specifying the section flag e.])
4130
4131     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
4132        gcc_cv_as_ix86_filds,,,
4133        [filds (%ebp); fists (%ebp)],,
4134        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
4135          [Define if your assembler uses filds and fists mnemonics.])])
4136
4137     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
4138        gcc_cv_as_ix86_fildq,,,
4139        [fildq (%ebp); fistpq (%ebp)],,
4140        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
4141          [Define if your assembler uses fildq and fistq mnemonics.])])
4142
4143     gcc_GAS_CHECK_FEATURE([cmov syntax],
4144       gcc_cv_as_ix86_cmov_sun_syntax,,,
4145       [cmovl.l %edx, %eax],,
4146       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
4147         [Define if your assembler supports the Sun syntax for cmov.])])
4148
4149     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
4150       gcc_cv_as_ix86_ffreep,,,
4151       [ffreep %st(1)],,
4152       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
4153         [Define if your assembler supports the ffreep mnemonic.])])
4154
4155     gcc_GAS_CHECK_FEATURE([.quad directive],
4156       gcc_cv_as_ix86_quad,,,
4157       [.quad 0],,
4158       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
4159         [Define if your assembler supports the .quad directive.])])
4160
4161     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
4162       gcc_cv_as_ix86_sahf,,,
4163       [.code64
4164        sahf],,
4165       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
4166         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
4167
4168     gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
4169       gcc_cv_as_ix86_interunit_movq,,,
4170       [.code64
4171        movq %mm0, %rax
4172        movq %rax, %xmm0])
4173     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
4174       [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
4175       [Define if your assembler supports interunit movq mnemonic.])
4176
4177     gcc_GAS_CHECK_FEATURE([hle prefixes],
4178       gcc_cv_as_ix86_hle,,,
4179       [lock xacquire cmpxchg %esi, (%ecx)],,
4180       [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
4181         [Define if your assembler supports HLE prefixes.])])
4182
4183     gcc_GAS_CHECK_FEATURE([swap suffix],
4184       gcc_cv_as_ix86_swap,,,
4185       [movl.s %esp, %ebp],,
4186       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
4187         [Define if your assembler supports the swap suffix.])])
4188
4189     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
4190       gcc_cv_as_ix86_diff_sect_delta,,,
4191       [.section .rodata
4192 .L1:
4193         .long .L2-.L1
4194         .long .L3-.L1
4195         .text
4196 .L3:    nop
4197 .L2:    nop],,
4198       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
4199         [Define if your assembler supports the subtraction of symbols in different sections.])])
4200
4201     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
4202         gcc_cv_as_ix86_rep_lock_prefix,,,
4203         [rep movsl
4204          rep ret
4205          rep nop
4206          rep bsf %ecx, %eax
4207          rep bsr %ecx, %eax
4208          lock addl %edi, (%eax,%esi)
4209          lock orl $0, (%esp)],,
4210         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
4211           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
4212
4213     gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
4214         gcc_cv_as_ix86_ud2,,,
4215         [ud2],,
4216       [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
4217         [Define if your assembler supports the 'ud2' mnemonic.])])
4218
4219     # Enforce 32-bit output with gas and gld.
4220     if test x$gas = xyes; then
4221       as_ix86_gas_32_opt="--32"
4222     fi
4223     if echo "$ld_ver" | grep GNU > /dev/null; then
4224       if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
4225         ld_ix86_gld_32_opt="-melf_i386_sol2"
4226       else
4227         ld_ix86_gld_32_opt="-melf_i386"
4228       fi
4229     fi
4230
4231     gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
4232         gcc_cv_as_ix86_tlsgdplt,,
4233         [$as_ix86_gas_32_opt],
4234         [call    tls_gd@tlsgdplt],
4235         [if test x$gcc_cv_ld != x \
4236          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4237            gcc_cv_as_ix86_tlsgdplt=yes
4238          fi
4239          rm -f conftest],
4240       [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
4241         [Define if your assembler and linker support @tlsgdplt.])])
4242
4243     conftest_s='
4244         .section .tdata,"aw'$tls_section_flag'",@progbits
4245 tls_ld:
4246         .section .text,"ax",@progbits
4247          call    tls_ld@tlsldmplt'
4248
4249     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
4250         gcc_cv_as_ix86_tlsldmplt,,
4251         [$as_ix86_gas_32_opt],
4252         [$conftest_s],
4253         [if test x$gcc_cv_ld != x \
4254          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4255            gcc_cv_as_ix86_tlsldmplt=yes
4256          fi
4257          rm -f conftest])
4258     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
4259       [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
4260       [Define to 1 if your assembler and linker support @tlsldmplt.])
4261
4262     conftest_s='
4263         .section .text,"ax",@progbits
4264         .globl  _start
4265         .type   _start, @function
4266 _start:
4267         leal    value@tlsldm(%ebx), %eax
4268         call    ___tls_get_addr@plt
4269
4270         .section .tdata,"aw'$tls_section_flag'",@progbits
4271         .type   value, @object
4272 value:'
4273     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
4274         gcc_cv_as_ix86_tlsldm,,
4275         [$as_ix86_gas_32_opt],
4276         [$conftest_s],
4277         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4278             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
4279            if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
4280               || dis conftest 2>/dev/null | grep nop > /dev/null; then
4281              gcc_cv_as_ix86_tlsldm=yes
4282            fi
4283          fi
4284          rm -f conftest])
4285     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
4286       [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
4287       [Define to 1 if your assembler and linker support @tlsldm.])
4288
4289     conftest_s='
4290         .data
4291 bar:
4292         .byte 1
4293         .text
4294         .global _start
4295 _start:
4296          cmpl $0, bar@GOT
4297          jmp *_start@GOT'
4298     gcc_GAS_CHECK_FEATURE([R_386_GOT32X reloc],
4299         gcc_cv_as_ix86_got32x,,
4300         [$as_ix86_gas_32_opt],
4301         [$conftest_s],
4302         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4303             && test x$gcc_cv_readelf != x \
4304             && $gcc_cv_readelf --relocs --wide conftest.o 2>&1 \
4305                | grep R_386_GOT32X > /dev/null 2>&1 \
4306             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4307            if $gcc_cv_objdump -dw conftest 2>&1 \
4308               | grep 0xffffff > /dev/null 2>&1; then
4309              gcc_cv_as_ix86_got32x=no
4310            else
4311              gcc_cv_as_ix86_got32x=yes
4312            fi
4313          fi
4314          rm -f conftest])
4315     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_GOT32X,
4316       [`if test x"$gcc_cv_as_ix86_got32x" = xyes; then echo 1; else echo 0; fi`],
4317       [Define 0/1 if your assembler and linker support @GOT.])
4318
4319     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
4320       gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
4321       [$as_ix86_gas_32_opt],
4322 [       .text
4323 .L0:
4324         nop
4325         .data
4326         .long .L0@GOTOFF])
4327     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
4328       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
4329       [Define true if the assembler supports '.long foo@GOTOFF'.])
4330
4331     conftest_s='
4332         .section .text,"ax",@progbits
4333         .globl  _start
4334         .type   _start, @function
4335 _start:
4336         leal    ld@tlsldm(%ecx), %eax
4337         call    *___tls_get_addr@GOT(%ecx)
4338         leal    gd@tlsgd(%ecx), %eax
4339         call    *___tls_get_addr@GOT(%ecx)
4340
4341         .section .tdata,"aw'$tls_section_flag'",@progbits
4342         .type   ld, @object
4343 ld:
4344         .byte 0
4345         .globl  gd
4346         .type   gd, @object
4347 gd:
4348         .byte 0'
4349     gcc_GAS_CHECK_FEATURE([calling ___tls_get_addr via GOT],
4350         gcc_cv_as_ix86_tls_get_addr_via_got,,
4351         [$as_ix86_gas_32_opt],
4352         [$conftest_s],
4353         [if test x$gcc_cv_ld != x \
4354             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4355            gcc_cv_as_ix86_tls_get_addr_via_got=yes
4356          fi
4357          rm -f conftest])
4358     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLS_GET_ADDR_GOT,
4359       [`if test x"$gcc_cv_as_ix86_tls_get_addr_via_got" = xyes; then echo 1; else echo 0; fi`],
4360       [Define 0/1 if your assembler and linker support calling ___tls_get_addr via GOT.])
4361     ;;
4362
4363   ia64*-*-*)
4364     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
4365         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
4366 [       .text
4367         addl r15 = @ltoffx(x#), gp
4368         ;;
4369         ld8.mov r16 = [[r15]], x#],,
4370     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
4371           [Define if your assembler supports ltoffx and ldxmov relocations.])])
4372
4373     ;;
4374
4375   powerpc*-*-*)
4376
4377     case $target in
4378       *-*-darwin*)
4379         gcc_GAS_CHECK_FEATURE([.machine directive support],
4380           gcc_cv_as_machine_directive,,,
4381           [     .machine ppc7400])
4382         if test x$gcc_cv_as_machine_directive != xyes; then
4383           echo "*** This target requires an assembler supporting \".machine\"" >&2
4384           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
4385           test x$build = x$target && exit 1
4386         fi
4387         ;;
4388     esac
4389
4390     case $target in
4391       *-*-aix*) conftest_s='    .machine "pwr5"
4392         .csect .text[[PR]]
4393         mfcr 3,128';;
4394       *-*-darwin*) conftest_s=' .text
4395         mfcr r3,128';;
4396       *) conftest_s='   .machine power4
4397         .text
4398         mfcr 3,128';;
4399     esac
4400
4401     gcc_GAS_CHECK_FEATURE([mfcr field support],
4402       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
4403       [$conftest_s],,
4404       [AC_DEFINE(HAVE_AS_MFCRF, 1,
4405           [Define if your assembler supports mfcr field.])])
4406
4407     case $target in
4408       *-*-aix*) conftest_s='    .machine "pwr5"
4409         .csect .text[[PR]]
4410         popcntb 3,3';;
4411       *) conftest_s='   .machine power5
4412         .text
4413         popcntb 3,3';;
4414     esac
4415
4416     gcc_GAS_CHECK_FEATURE([popcntb support],
4417       gcc_cv_as_powerpc_popcntb, [2,17,0],,
4418       [$conftest_s],,
4419       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
4420           [Define if your assembler supports popcntb field.])])
4421
4422     case $target in
4423       *-*-aix*) conftest_s='    .machine "pwr5x"
4424         .csect .text[[PR]]
4425         frin 1,1';;
4426       *) conftest_s='   .machine power5
4427         .text
4428         frin 1,1';;
4429     esac
4430
4431     gcc_GAS_CHECK_FEATURE([fp round support],
4432       gcc_cv_as_powerpc_fprnd, [2,17,0],,
4433       [$conftest_s],,
4434       [AC_DEFINE(HAVE_AS_FPRND, 1,
4435           [Define if your assembler supports fprnd.])])
4436
4437     case $target in
4438       *-*-aix*) conftest_s='    .machine "pwr6"
4439         .csect .text[[PR]]
4440         mffgpr 1,3';;
4441       *) conftest_s='   .machine power6
4442         .text
4443         mffgpr 1,3';;
4444     esac
4445
4446     gcc_GAS_CHECK_FEATURE([move fp gpr support],
4447       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
4448       [$conftest_s],,
4449       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
4450           [Define if your assembler supports mffgpr and mftgpr.])])
4451
4452     case $target in
4453       *-*-aix*) conftest_s='    .csect .text[[PR]]
4454 LCF..0:
4455         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
4456       *-*-darwin*)
4457         conftest_s='    .text
4458 LCF0:
4459         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
4460       *) conftest_s='   .text
4461 .LCF0:
4462         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
4463     esac
4464
4465     gcc_GAS_CHECK_FEATURE([rel16 relocs],
4466       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
4467       [$conftest_s],,
4468       [AC_DEFINE(HAVE_AS_REL16, 1,
4469           [Define if your assembler supports R_PPC_REL16 relocs.])])
4470
4471     case $target in
4472       *-*-aix*) conftest_s='    .machine "pwr6"
4473         .csect .text[[PR]]
4474         cmpb 3,4,5';;
4475       *) conftest_s='   .machine power6
4476         .text
4477         cmpb 3,4,5';;
4478     esac
4479
4480     gcc_GAS_CHECK_FEATURE([compare bytes support],
4481       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
4482       [$conftest_s],,
4483       [AC_DEFINE(HAVE_AS_CMPB, 1,
4484           [Define if your assembler supports cmpb.])])
4485
4486     case $target in
4487       *-*-aix*) conftest_s='    .machine "pwr6"
4488         .csect .text[[PR]]
4489         dadd 1,2,3';;
4490       *) conftest_s='   .machine power6
4491         .text
4492         dadd 1,2,3';;
4493     esac
4494
4495     gcc_GAS_CHECK_FEATURE([decimal float support],
4496       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
4497       [$conftest_s],,
4498       [AC_DEFINE(HAVE_AS_DFP, 1,
4499           [Define if your assembler supports DFP instructions.])])
4500
4501     case $target in
4502       *-*-aix*) conftest_s='    .machine "pwr7"
4503         .csect .text[[PR]]
4504         lxvd2x 1,2,3';;
4505       *) conftest_s='   .machine power7
4506         .text
4507         lxvd2x 1,2,3';;
4508     esac
4509
4510     gcc_GAS_CHECK_FEATURE([vector-scalar support],
4511       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
4512       [$conftest_s],,
4513       [AC_DEFINE(HAVE_AS_VSX, 1,
4514           [Define if your assembler supports VSX instructions.])])
4515
4516     case $target in
4517       *-*-aix*) conftest_s='    .machine "pwr7"
4518         .csect .text[[PR]]
4519         popcntd 3,3';;
4520       *) conftest_s='   .machine power7
4521         .text
4522         popcntd 3,3';;
4523     esac
4524
4525     gcc_GAS_CHECK_FEATURE([popcntd support],
4526       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
4527       [$conftest_s],,
4528       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
4529           [Define if your assembler supports POPCNTD instructions.])])
4530
4531     case $target in
4532       *-*-aix*) conftest_s='    .machine "pwr8"
4533         .csect .text[[PR]]';;
4534       *) conftest_s='   .machine power8
4535         .text';;
4536     esac
4537
4538     gcc_GAS_CHECK_FEATURE([power8 support],
4539       gcc_cv_as_powerpc_power8, [2,19,2], -a32,
4540       [$conftest_s],,
4541       [AC_DEFINE(HAVE_AS_POWER8, 1,
4542           [Define if your assembler supports POWER8 instructions.])])
4543
4544     case $target in
4545       *-*-aix*) conftest_s='    .machine "pwr9"
4546         .csect .text[[PR]]';;
4547       *) conftest_s='   .machine power9
4548         .text';;
4549     esac
4550
4551     gcc_GAS_CHECK_FEATURE([power9 support],
4552       gcc_cv_as_powerpc_power9, [2,19,2], -a32,
4553       [$conftest_s],,
4554       [AC_DEFINE(HAVE_AS_POWER9, 1,
4555           [Define if your assembler supports POWER9 instructions.])])
4556
4557     case $target in
4558       *-*-aix*) conftest_s='    .csect .text[[PR]]
4559         lwsync';;
4560       *) conftest_s='   .text
4561         lwsync';;
4562     esac
4563
4564     gcc_GAS_CHECK_FEATURE([lwsync support],
4565       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
4566       [$conftest_s],,
4567       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
4568           [Define if your assembler supports LWSYNC instructions.])])
4569
4570     case $target in
4571       *-*-aix*) conftest_s='    .machine "476"
4572         .csect .text[[PR]]
4573         dci 0';;
4574       *) conftest_s='   .machine "476"
4575         .text
4576         dci 0';;
4577     esac
4578
4579     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
4580       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
4581       [$conftest_s],,
4582       [AC_DEFINE(HAVE_AS_DCI, 1,
4583           [Define if your assembler supports the DCI/ICI instructions.])])
4584
4585     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4586       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
4587       [.gnu_attribute 4,1],,
4588       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4589           [Define if your assembler supports .gnu_attribute.])])
4590
4591     gcc_GAS_CHECK_FEATURE([tls marker support],
4592       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
4593       [ bl __tls_get_addr(x@tlsgd)],,
4594       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
4595           [Define if your assembler supports arg info for __tls_get_addr.])])
4596
4597     gcc_GAS_CHECK_FEATURE([prologue entry point marker support],
4598       gcc_cv_as_powerpc_entry_markers, [2,26,0],-a64 --fatal-warnings,
4599       [ .reloc .,R_PPC64_ENTRY; nop],,
4600       [AC_DEFINE(HAVE_AS_ENTRY_MARKERS, 1,
4601           [Define if your assembler supports the R_PPC64_ENTRY relocation.])])
4602
4603     case $target in
4604       *-*-aix*)
4605         gcc_GAS_CHECK_FEATURE([AIX .ref support],
4606           gcc_cv_as_aix_ref, [2,21,0],,
4607           [     .csect stuff[[rw]]
4608              stuff:
4609                 .long 1
4610                 .extern sym
4611                 .ref sym
4612           ],,
4613           [AC_DEFINE(HAVE_AS_REF, 1,
4614             [Define if your assembler supports .ref])])
4615
4616         gcc_GAS_CHECK_FEATURE([AIX DWARF location lists section support],
4617           gcc_cv_as_aix_dwloc, [2,21,0],,
4618           [     .dwsect 0xA0000
4619         Lframe..0:
4620                 .vbyte 4,Lframe..0
4621           ],,
4622           [AC_DEFINE(HAVE_XCOFF_DWARF_EXTRAS, 1,
4623             [Define if your assembler supports AIX debug frame section label reference.])])
4624         ;;
4625     esac
4626     ;;
4627
4628   mips*-*-*)
4629     gcc_GAS_CHECK_FEATURE([explicit relocation support],
4630       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
4631 [       lw $4,%gp_rel(foo)($4)],,
4632       [if test x$target_cpu_default = x
4633        then target_cpu_default=MASK_EXPLICIT_RELOCS
4634        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
4635        fi])
4636
4637     gcc_GAS_CHECK_FEATURE([-mno-shared support],
4638       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
4639       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
4640                  [Define if the assembler understands -mno-shared.])])
4641
4642     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4643       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
4644       [.gnu_attribute 4,1],,
4645       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4646           [Define if your assembler supports .gnu_attribute.])])
4647
4648     gcc_GAS_CHECK_FEATURE([.module support],
4649       gcc_cv_as_mips_dot_module,,[-32],
4650       [.module mips2
4651        .module fp=xx],,
4652       [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
4653           [Define if your assembler supports .module.])])
4654     if test x$gcc_cv_as_mips_dot_module = xno \
4655        && test x$with_fp_32 != x; then
4656       AC_MSG_ERROR(
4657         [Requesting --with-fp-32= requires assembler support for .module.])
4658     fi
4659
4660     gcc_GAS_CHECK_FEATURE([.micromips support],
4661       gcc_cv_as_micromips_support,,[--fatal-warnings],
4662       [.set micromips],,
4663       [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
4664           [Define if your assembler supports the .set micromips directive])])
4665
4666     gcc_GAS_CHECK_FEATURE([.dtprelword support],
4667       gcc_cv_as_mips_dtprelword, [2,18,0],,
4668       [.section .tdata,"awT",@progbits
4669 x:
4670         .word 2
4671         .text
4672         .dtprelword x+0x8000],,
4673       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
4674           [Define if your assembler supports .dtprelword.])])
4675
4676     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
4677       gcc_cv_as_mips_dspr1_mult,,,
4678 [       .set    mips32r2
4679         .set    nodspr2
4680         .set    dsp
4681         madd    $ac3,$4,$5
4682         maddu   $ac3,$4,$5
4683         msub    $ac3,$4,$5
4684         msubu   $ac3,$4,$5
4685         mult    $ac3,$4,$5
4686         multu   $ac3,$4,$5],,
4687       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
4688           [Define if your assembler supports DSPR1 mult.])])
4689
4690     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
4691     gcc_cv_as_ld_jalr_reloc=no
4692     if test $gcc_cv_as_mips_explicit_relocs = yes; then
4693       if test $in_tree_ld = yes ; then
4694         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
4695            && test $in_tree_ld_is_elf = yes; then
4696           gcc_cv_as_ld_jalr_reloc=yes
4697         fi
4698       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
4699         echo '  .ent x' > conftest.s
4700         echo 'x:        lw $2,%got_disp(y)($3)' >> conftest.s
4701         echo '  lw $25,%call16(y)($28)' >> conftest.s
4702         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
4703         echo '1:        jalr $25' >> conftest.s
4704         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
4705         echo '1:        jalr $25' >> conftest.s
4706         echo '  .end x' >> conftest.s
4707         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
4708            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
4709           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
4710              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
4711             gcc_cv_as_ld_jalr_reloc=yes
4712           fi
4713         fi
4714         rm -f conftest.*
4715       fi
4716     fi
4717     if test $gcc_cv_as_ld_jalr_reloc = yes; then
4718       if test x$target_cpu_default = x; then
4719         target_cpu_default=MASK_RELAX_PIC_CALLS
4720       else
4721         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
4722       fi
4723     fi
4724     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
4725
4726     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
4727       [gcc_cv_ld_mips_personality_relaxation],
4728       [gcc_cv_ld_mips_personality_relaxation=no
4729        if test $in_tree_ld = yes ; then
4730          if test "$gcc_cv_gld_major_version" -eq 2 \
4731                  -a "$gcc_cv_gld_minor_version" -ge 21 \
4732                  -o "$gcc_cv_gld_major_version" -gt 2; then
4733            gcc_cv_ld_mips_personality_relaxation=yes
4734          fi
4735        elif test x$gcc_cv_as != x \
4736                  -a x$gcc_cv_ld != x \
4737                  -a x$gcc_cv_readelf != x ; then
4738          cat > conftest.s <<EOF
4739         .cfi_startproc
4740         .cfi_personality 0x80,indirect_ptr
4741         .ent test
4742 test:
4743         nop
4744         .end test
4745         .cfi_endproc
4746
4747         .section .data,"aw",@progbits
4748 indirect_ptr:
4749         .dc.a personality
4750 EOF
4751          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
4752             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
4753            if $gcc_cv_readelf -d conftest 2>&1 \
4754               | grep TEXTREL > /dev/null 2>&1; then
4755              :
4756            elif $gcc_cv_readelf --relocs conftest 2>&1 \
4757                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
4758              :
4759            else
4760              gcc_cv_ld_mips_personality_relaxation=yes
4761            fi
4762          fi
4763        fi
4764        rm -f conftest.s conftest.o conftest])
4765     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
4766             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
4767       [Define if your linker can relax absolute .eh_frame personality
4768 pointers into PC-relative form.])
4769     fi
4770
4771     gcc_GAS_CHECK_FEATURE([-mnan= support],
4772       gcc_cv_as_mips_nan,,
4773       [-mnan=2008],,,
4774       [AC_DEFINE(HAVE_AS_NAN, 1,
4775                  [Define if the assembler understands -mnan=.])])
4776     if test x$gcc_cv_as_mips_nan = xno \
4777        && test x$with_nan != x; then
4778       AC_MSG_ERROR(
4779         [Requesting --with-nan= requires assembler support for -mnan=])
4780     fi
4781     ;;
4782     s390*-*-*)
4783     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4784       gcc_cv_as_s390_gnu_attribute, [2,18,0],,
4785       [.gnu_attribute 8,1],,
4786       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4787           [Define if your assembler supports .gnu_attribute.])])
4788     gcc_GAS_CHECK_FEATURE([.machine and .machinemode support],
4789       gcc_cv_as_s390_machine_machinemode, [2,24,0],,
4790       [ .machinemode push
4791         .machinemode pop
4792         .machine push
4793         .machine pop],,
4794       [AC_DEFINE(HAVE_AS_MACHINE_MACHINEMODE, 1,
4795           [Define if your assembler supports .machine and .machinemode.])])
4796     gcc_GAS_CHECK_FEATURE([architecture modifiers support],
4797       gcc_cv_as_s390_architecture_modifiers, [2,26,0],,
4798       [ .machine z13+vx ],,
4799       [AC_DEFINE(HAVE_AS_ARCHITECTURE_MODIFIERS, 1,
4800           [Define if your assembler supports architecture modifiers.])])
4801     ;;
4802 esac
4803
4804 # Mips and HP-UX need the GNU assembler.
4805 # Linux on IA64 might be able to use the Intel assembler.
4806
4807 case "$target" in
4808   mips*-*-* | *-*-hpux* )
4809     if test x$gas_flag = xyes \
4810        || test x"$host" != x"$build" \
4811        || test ! -x "$gcc_cv_as" \
4812        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
4813       :
4814     else
4815       echo "*** This configuration requires the GNU assembler" >&2
4816       exit 1
4817     fi
4818     ;;
4819 esac
4820
4821 # ??? Not all targets support dwarf2 debug_line, even within a version
4822 # of gas.  Moreover, we need to emit a valid instruction to trigger any
4823 # info to the output file.  So, as supported targets are added to gas 2.11,
4824 # add some instruction here to (also) show we expect this might work.
4825 # ??? Once 2.11 is released, probably need to add first known working
4826 # version to the per-target configury.
4827 case "$cpu_type" in
4828   aarch64 | alpha | arc | arm | avr | bfin | cris | i386 | m32c | m68k \
4829   | microblaze | mips | nios2 | pa | riscv | rs6000 | score | sparc | spu \
4830   | tilegx | tilepro | visium | xstormy16 | xtensa)
4831     insn="nop"
4832     ;;
4833   ia64 | s390)
4834     insn="nop 0"
4835     ;;
4836   mmix)
4837     insn="swym 0"
4838     ;;
4839 esac
4840 if test x"$insn" != x; then
4841  conftest_s="\
4842         .file 1 \"conftest.s\"
4843         .loc 1 3 0
4844         $insn"
4845  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
4846   gcc_cv_as_dwarf2_debug_line,
4847   [elf,2,11,0],, [$conftest_s],
4848   [if test x$gcc_cv_objdump != x \
4849    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
4850       | grep debug_line > /dev/null 2>&1; then
4851      gcc_cv_as_dwarf2_debug_line=yes
4852    fi])
4853
4854 # The .debug_line file table must be in the exact order that
4855 # we specified the files, since these indices are also used
4856 # by DW_AT_decl_file.  Approximate this test by testing if
4857 # the assembler bitches if the same index is assigned twice.
4858  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
4859   gcc_cv_as_dwarf2_file_buggy,,,
4860 [       .file 1 "foo.s"
4861         .file 1 "bar.s"])
4862
4863  if test $gcc_cv_as_dwarf2_debug_line = yes \
4864  && test $gcc_cv_as_dwarf2_file_buggy = no; then
4865         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
4866   [Define if your assembler supports dwarf2 .file/.loc directives,
4867    and preserves file table indices exactly as given.])
4868  fi
4869
4870  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
4871   gcc_cv_as_gdwarf2_flag,
4872   [elf,2,11,0], [--gdwarf2], [$insn],,
4873   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
4874 [Define if your assembler supports the --gdwarf2 option.])])
4875
4876  gcc_GAS_CHECK_FEATURE([--gstabs option],
4877   gcc_cv_as_gstabs_flag,
4878   [elf,2,11,0], [--gstabs], [$insn],,
4879   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
4880 [Define if your assembler supports the --gstabs option.])])
4881
4882  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
4883   gcc_cv_as_debug_prefix_map_flag,
4884   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
4885   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
4886 [Define if your assembler supports the --debug-prefix-map option.])])
4887 fi
4888
4889 gcc_GAS_CHECK_FEATURE([compressed debug sections],
4890   gcc_cv_as_compress_debug,,,,
4891   [# gas compiled without zlib cannot compress debug sections and warns
4892    # about it, but still exits successfully.  So check for this, too.
4893    if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
4894    then
4895      gcc_cv_as_compress_debug=0
4896    # Since binutils 2.26, gas supports --compress-debug-sections=type,
4897    # defaulting to the ELF gABI format.
4898    elif $gcc_cv_as --compress-debug-sections=zlib-gnu -o conftest.o conftest.s > /dev/null 2>&1
4899    then
4900      gcc_cv_as_compress_debug=2
4901      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4902      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4903    # Before binutils 2.26, gas only supported --compress-debug-options and
4904    # emitted the traditional GNU format.
4905    elif $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s > /dev/null 2>&1
4906    then
4907      gcc_cv_as_compress_debug=1
4908      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4909      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4910    else
4911      gcc_cv_as_compress_debug=0
4912    fi])
4913 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
4914 [Define to the level of your assembler's compressed debug section support.])
4915 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
4916 [Define to the assembler option to enable compressed debug sections.])
4917 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
4918 [Define to the assembler option to disable compressed debug sections.])
4919
4920 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
4921  ,,
4922 [.lcomm bar,4,16],,
4923 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
4924   [Define if your assembler supports .lcomm with an alignment field.])])
4925
4926 if test x$with_sysroot = x && test x$host = x$target \
4927    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4928    && test "$prefix" != "NONE"; then
4929   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4930 [Define to PREFIX/include if cpp should also search that directory.])
4931 fi
4932
4933 # Determine the version of glibc, if any, used on the target.
4934 AC_MSG_CHECKING([for target glibc version])
4935 AC_ARG_WITH([glibc-version],
4936   [AS_HELP_STRING([--with-glibc-version=M.N],
4937     [assume GCC used with glibc version M.N or later])], [
4938 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
4939   glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
4940   glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
4941 else
4942   AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
4943 fi], [
4944 glibc_version_major=0
4945 glibc_version_minor=0
4946 [if test -f $target_header_dir/features.h \
4947   && glibc_version_major_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC__[    ]+[0-9]' $target_header_dir/features.h` \
4948   && glibc_version_minor_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+[0-9]' $target_header_dir/features.h`; then
4949   glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[      ]*//'`
4950   glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[        ]*//'`
4951 fi]])
4952 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
4953 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MAJOR], [$glibc_version_major],
4954 [GNU C Library major version number used on the target, or 0.])
4955 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MINOR], [$glibc_version_minor],
4956 [GNU C Library minor version number used on the target, or 0.])
4957
4958 AC_ARG_ENABLE(gnu-unique-object,
4959  [AS_HELP_STRING([--enable-gnu-unique-object],
4960    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
4961  [case $enable_gnu_unique_object in
4962     yes | no) ;;
4963     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
4964 Valid choices are 'yes' and 'no'.]) ;;
4965   esac],
4966  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
4967    [elf,2,19,52],,
4968    [.type foo, '$target_type_format_char'gnu_unique_object],,
4969 # We need to unquote above to to use the definition from config.gcc.
4970 # Also check for ld.so support, i.e. glibc 2.11 or higher.
4971    [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
4972    )])
4973 if test x$enable_gnu_unique_object = xyes; then
4974   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
4975    [Define if your assembler supports @gnu_unique_object.])
4976 fi
4977
4978 AC_CACHE_CHECK([assembler for tolerance to line number 0],
4979  [gcc_cv_as_line_zero],
4980  [gcc_cv_as_line_zero=no
4981   if test $in_tree_gas = yes; then
4982     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
4983   elif test "x$gcc_cv_as" != x; then
4984     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
4985     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
4986        test "x`cat conftest.out`" = x
4987     then
4988       gcc_cv_as_line_zero=yes
4989     else
4990       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
4991       cat conftest.s >&AS_MESSAGE_LOG_FD
4992       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
4993       cat conftest.out >&AS_MESSAGE_LOG_FD
4994     fi
4995     rm -f conftest.o conftest.s conftest.out
4996   fi])
4997 if test "x$gcc_cv_as_line_zero" = xyes; then
4998   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
4999 [Define if the assembler won't complain about a line such as # 0 "" 2.])
5000 fi
5001
5002 AC_MSG_CHECKING(support for thin archives)
5003 thin_archive_support=no
5004 echo 'int main (void) { return 0; }' > conftest.c
5005 if ($AR --version | sed 1q | grep "GNU ar" \
5006     && $CC $CFLAGS -c conftest.c \
5007     && $AR rcT conftest.a conftest.o \
5008     && $CC $CFLAGS $LDFLAGS -o conftest conftest.a) >/dev/null 2>&1; then
5009   thin_archive_support=yes
5010 fi
5011 rm -f conftest.c conftest.o conftest.a conftest
5012 AC_MSG_RESULT($thin_archive_support)
5013 AC_SUBST(thin_archive_support)
5014
5015 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
5016 gcc_cv_ld_eh_frame_hdr=no
5017 if test $in_tree_ld = yes ; then
5018   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
5019      && test $in_tree_ld_is_elf = yes; then
5020     gcc_cv_ld_eh_frame_hdr=yes
5021   fi
5022 elif test x$gcc_cv_ld != x; then
5023   if echo "$ld_ver" | grep GNU > /dev/null; then
5024     # Check if linker supports --eh-frame-hdr option
5025     if $gcc_cv_ld --help 2>&1 | grep eh-frame-hdr > /dev/null; then
5026       gcc_cv_ld_eh_frame_hdr=yes
5027     fi
5028   else
5029     case "$target" in
5030       *-*-solaris2*)
5031         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
5032         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
5033           gcc_cv_ld_eh_frame_hdr=yes
5034         fi
5035         ;;
5036     esac
5037   fi
5038 fi
5039 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
5040 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
5041         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
5042 [Define if your linker supports .eh_frame_hdr.])
5043 fi
5044 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
5045
5046 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
5047 gcc_cv_ld_eh_frame_ciev3=no
5048 if test $in_tree_ld = yes ; then
5049   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5050      && test $in_tree_ld_is_elf = yes; then
5051     gcc_cv_ld_eh_frame_ciev3=yes
5052   fi
5053 elif test x$gcc_cv_ld != x; then
5054   if echo "$ld_ver" | grep GNU > /dev/null; then
5055     gcc_cv_ld_eh_frame_ciev3=yes
5056     if test 0"$ld_date" -lt 20040513; then
5057       if test -n "$ld_date"; then
5058         # If there was date string, but was earlier than 2004-05-13, fail
5059         gcc_cv_ld_eh_frame_ciev3=no
5060       elif test "$ld_vers_major" -lt 2; then
5061         gcc_cv_ld_eh_frame_ciev3=no
5062       elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
5063         gcc_cv_ld_eh_frame_ciev3=no
5064       fi
5065     fi
5066   else
5067     case "$target" in
5068       *-*-solaris2*)
5069         # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
5070         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
5071           gcc_cv_ld_eh_frame_ciev3=yes
5072         fi
5073         ;;
5074     esac
5075   fi
5076 fi
5077 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
5078   [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
5079   [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
5080 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
5081
5082 AC_MSG_CHECKING(linker position independent executable support)
5083 gcc_cv_ld_pie=no
5084 if test $in_tree_ld = yes ; then
5085   case "$target" in
5086     # Full PIE support on Solaris was only introduced in gld 2.26.
5087     *-*-solaris2*)  gcc_gld_pie_min_version=26 ;;
5088     *)              gcc_gld_pie_min_version=15 ;;
5089   esac
5090   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge "$gcc_gld_pie_min_version" -o "$gcc_cv_gld_major_version" -gt 2 \
5091      && test $in_tree_ld_is_elf = yes; then
5092     gcc_cv_ld_pie=yes
5093   fi
5094 elif test x$gcc_cv_ld != x; then
5095   # Check if linker supports -pie option
5096   if $gcc_cv_ld --help 2>&1 | grep -- -pie > /dev/null; then
5097     gcc_cv_ld_pie=yes
5098     case "$target" in
5099       *-*-solaris2*)
5100         if echo "$ld_ver" | grep GNU > /dev/null \
5101           && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5102           gcc_cv_ld_pie=no
5103         fi
5104         ;;
5105     esac
5106   else
5107     case "$target" in
5108       *-*-solaris2.1[[1-9]]*)
5109         # Solaris 11.3 added PIE support.
5110         if $gcc_cv_ld -z help 2>&1 | grep -- type.*pie > /dev/null; then
5111           gcc_cv_ld_pie=yes
5112         fi
5113         ;;
5114     esac
5115   fi
5116 fi
5117 if test x"$gcc_cv_ld_pie" = xyes; then
5118         AC_DEFINE(HAVE_LD_PIE, 1,
5119 [Define if your linker supports PIE option.])
5120 fi
5121 AC_MSG_RESULT($gcc_cv_ld_pie)
5122
5123 AC_MSG_CHECKING(linker PIE support with copy reloc)
5124 gcc_cv_ld_pie_copyreloc=no
5125 if test $gcc_cv_ld_pie = yes ; then
5126   if test $in_tree_ld = yes ; then
5127     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
5128       gcc_cv_ld_pie_copyreloc=yes
5129     fi
5130   elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5131     # Check if linker supports -pie option with copy reloc
5132     case "$target" in
5133     i?86-*-linux* | x86_64-*-linux*)
5134       cat > conftest1.s <<EOF
5135         .globl  a_glob
5136         .data
5137         .type   a_glob, @object
5138         .size   a_glob, 4
5139 a_glob:
5140         .long   2
5141 EOF
5142       cat > conftest2.s <<EOF
5143         .text
5144         .globl  main
5145         .type   main, @function
5146 main:
5147         movl    %eax, a_glob(%rip)
5148         .size   main, .-main
5149         .globl  ptr
5150         .section        .data.rel,"aw",@progbits
5151         .type   ptr, @object
5152 ptr:
5153         .quad   a_glob
5154 EOF
5155       if $gcc_cv_as --64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5156          && $gcc_cv_ld -shared -melf_x86_64 -o conftest1.so conftest1.o > /dev/null 2>&1 \
5157          && $gcc_cv_as --64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5158          && $gcc_cv_ld -pie -melf_x86_64 -o conftest conftest2.o conftest1.so > /dev/null 2>&1; then
5159         gcc_cv_ld_pie_copyreloc=yes
5160       fi
5161       rm -f conftest conftest1.so conftest1.o conftest2.o conftest1.s conftest2.s
5162       ;;
5163     esac
5164   fi
5165 fi
5166 AC_DEFINE_UNQUOTED(HAVE_LD_PIE_COPYRELOC,
5167   [`if test x"$gcc_cv_ld_pie_copyreloc" = xyes; then echo 1; else echo 0; fi`],
5168   [Define 0/1 if your linker supports -pie option with copy reloc.])
5169 AC_MSG_RESULT($gcc_cv_ld_pie_copyreloc)
5170
5171 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
5172 gcc_cv_ld_eh_gc_sections=no
5173 if test $in_tree_ld = yes ; then
5174   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
5175      && test $in_tree_ld_is_elf = yes; then
5176     gcc_cv_ld_eh_gc_sections=yes
5177   fi
5178 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
5179   cat > conftest.s <<EOF
5180         .section        .text
5181 .globl _start
5182         .type _start, @function
5183 _start:
5184         .long foo
5185         .size _start, .-_start
5186         .section        .text.foo,"ax",@progbits
5187         .type foo, @function
5188 foo:
5189         .long 0
5190         .size foo, .-foo
5191         .section        .gcc_except_table.foo,"a",@progbits
5192 .L0:
5193         .long 0
5194         .section        .eh_frame,"a",@progbits
5195         .long .L0
5196 EOF
5197   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5198     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5199          | grep "gc-sections option ignored" > /dev/null; then
5200       gcc_cv_ld_eh_gc_sections=no
5201     elif $gcc_cv_objdump -h conftest 2> /dev/null \
5202          | grep gcc_except_table > /dev/null; then
5203       gcc_cv_ld_eh_gc_sections=yes
5204       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
5205       if test x$gcc_cv_as_comdat_group != xyes; then
5206         gcc_cv_ld_eh_gc_sections=no
5207         cat > conftest.s <<EOF
5208         .section        .text
5209 .globl _start
5210         .type _start, @function
5211 _start:
5212         .long foo
5213         .size _start, .-_start
5214         .section        .gnu.linkonce.t.foo,"ax",@progbits
5215         .type foo, @function
5216 foo:
5217         .long 0
5218         .size foo, .-foo
5219         .section        .gcc_except_table.foo,"a",@progbits
5220 .L0:
5221         .long 0
5222         .section        .eh_frame,"a",@progbits
5223         .long .L0
5224 EOF
5225         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5226           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5227                | grep "gc-sections option ignored" > /dev/null; then
5228             gcc_cv_ld_eh_gc_sections=no
5229           elif $gcc_cv_objdump -h conftest 2> /dev/null \
5230                | grep gcc_except_table > /dev/null; then
5231             gcc_cv_ld_eh_gc_sections=yes
5232           fi
5233         fi
5234       fi
5235     fi
5236   fi
5237   rm -f conftest.s conftest.o conftest
5238 fi
5239 case "$target" in
5240   hppa*-*-linux*)
5241     # ??? This apparently exposes a binutils bug with PC-relative relocations.
5242     gcc_cv_ld_eh_gc_sections=no
5243     ;;
5244 esac
5245 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
5246         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
5247   [Define if your linker supports garbage collection of
5248    sections in presence of EH frames.])
5249 fi
5250 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
5251
5252 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
5253 gcc_cv_ld_eh_gc_sections_bug=no
5254 if test $in_tree_ld = yes ; then
5255   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
5256      && test $in_tree_ld_is_elf = yes; then
5257     gcc_cv_ld_eh_gc_sections_bug=yes
5258   fi
5259 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x -a x$gcc_cv_as_comdat_group = xyes; then
5260   gcc_cv_ld_eh_gc_sections_bug=yes
5261   cat > conftest.s <<EOF
5262         .section        .text
5263 .globl _start
5264         .type _start, @function
5265 _start:
5266         .long foo
5267         .size _start, .-_start
5268         .section        .text.startup.foo,"ax",@progbits
5269         .type foo, @function
5270 foo:
5271         .long 0
5272         .size foo, .-foo
5273         .section        .gcc_except_table.foo,"a",@progbits
5274 .L0:
5275         .long 0
5276         .section        .eh_frame,"a",@progbits
5277         .long .L0
5278 EOF
5279   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5280     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5281          | grep "gc-sections option ignored" > /dev/null; then
5282       :
5283     elif $gcc_cv_objdump -h conftest 2> /dev/null \
5284          | grep gcc_except_table > /dev/null; then
5285       gcc_cv_ld_eh_gc_sections_bug=no
5286     fi
5287   fi
5288   rm -f conftest.s conftest.o conftest
5289 fi
5290 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
5291         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
5292   [Define if your linker has buggy garbage collection of
5293    sections support when .text.startup.foo like sections are used.])
5294 fi
5295 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
5296
5297 AC_MSG_CHECKING(linker for compressed debug sections)
5298 # gold/gld support compressed debug sections since binutils 2.19/2.21
5299 # In binutils 2.26, gld gained support for the ELF gABI format.
5300 if test $in_tree_ld = yes ; then
5301   gcc_cv_ld_compress_debug=0
5302   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 19 -o "$gcc_cv_gld_major_version" -gt 2 \
5303      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = yes; then
5304     gcc_cv_ld_compress_debug=2
5305     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5306   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 26 -o "$gcc_cv_gld_major_version" -gt 2 \
5307      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = no; then
5308     gcc_cv_ld_compress_debug=3
5309     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5310   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2 \
5311      && test $in_tree_ld_is_elf = yes; then
5312     gcc_cv_ld_compress_debug=1
5313   fi
5314 elif echo "$ld_ver" | grep GNU > /dev/null; then
5315   if test "$ld_vers_major" -lt 2 \
5316      || test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 21; then
5317     gcc_cv_ld_compress_debug=0
5318   elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5319     gcc_cv_ld_compress_debug=1
5320   else
5321     gcc_cv_ld_compress_debug=3
5322     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5323   fi
5324   if test $ld_is_gold = yes; then
5325     gcc_cv_ld_compress_debug=2
5326     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5327   fi
5328 else
5329 changequote(,)dnl
5330   case "${target}" in
5331     *-*-solaris2*)
5332       # Introduced in Solaris 11.2.
5333       if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
5334         gcc_cv_ld_compress_debug=3
5335         gcc_cv_ld_compress_debug_option="-z compress-sections"
5336       else
5337         gcc_cv_ld_compress_debug=0
5338       fi
5339       ;;
5340     *)
5341       # Assume linkers other than GNU ld don't support compessed debug
5342       # sections.
5343       gcc_cv_ld_compress_debug=0
5344       ;;
5345   esac
5346 changequote([,])dnl
5347 fi
5348 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
5349 [Define to the level of your linker's compressed debug section support.])
5350 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
5351 [Define to the linker option to enable compressed debug sections.])
5352 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
5353
5354 if test x"$ld64_flag" = x"yes"; then
5355
5356   # Set defaults for possibly untestable items.
5357   gcc_cv_ld64_export_dynamic=0
5358
5359   if test "$build" = "$host"; then
5360     darwin_try_test=1
5361   else
5362     darwin_try_test=0
5363   fi
5364
5365   # On Darwin, because of FAT library support, it is often possible to execute
5366   # exes from compatible archs even when the host differs from the build system.
5367   case "$build","$host" in
5368     x86_64-*-darwin*,i?86-*-darwin* | powerpc64*-*-darwin*,powerpc*-*-darwin*)
5369         darwin_try_test=1;;
5370     *) ;;
5371   esac
5372
5373   # If the configurer specified a minimum ld64 version to be supported, then use
5374   # that to determine feature support.
5375   if test x"${gcc_cv_ld64_version}" != x; then
5376     AC_MSG_CHECKING(ld64 specified version)
5377     gcc_cv_ld64_major=`echo "$gcc_cv_ld64_version" | sed -e 's/\..*//'`
5378     AC_MSG_RESULT($gcc_cv_ld64_major)
5379    if test "$gcc_cv_ld64_major" -ge 236; then
5380       gcc_cv_ld64_export_dynamic=1
5381     fi
5382   elif test -x "$gcc_cv_ld" -a "$darwin_try_test" -eq 1; then
5383     # If the version was not specified, try to find it.
5384     AC_MSG_CHECKING(linker version)
5385     if test x"${gcc_cv_ld64_version}" = x; then
5386       gcc_cv_ld64_version=`$gcc_cv_ld -v 2>&1 | grep ld64 | sed s/.*ld64-// | awk '{print $1}'`
5387     fi
5388     AC_MSG_RESULT($gcc_cv_ld64_version)
5389
5390     AC_MSG_CHECKING(linker for -export_dynamic support)
5391     gcc_cv_ld64_export_dynamic=1
5392     if $gcc_cv_ld -export_dynamic < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
5393       gcc_cv_ld64_export_dynamic=0
5394     fi
5395     AC_MSG_RESULT($gcc_cv_ld64_export_dynamic)
5396   fi
5397
5398   if test x"${gcc_cv_ld64_version}" != x; then
5399     AC_DEFINE_UNQUOTED(LD64_VERSION, "${gcc_cv_ld64_version}",
5400       [Define to ld64 version.])
5401   fi
5402
5403   AC_DEFINE_UNQUOTED(LD64_HAS_EXPORT_DYNAMIC, $gcc_cv_ld64_export_dynamic,
5404   [Define to 1 if ld64 supports '-export_dynamic'.])
5405 fi
5406
5407 # --------
5408 # UNSORTED
5409 # --------
5410
5411 AC_CACHE_CHECK(linker --as-needed support,
5412 gcc_cv_ld_as_needed,
5413 [gcc_cv_ld_as_needed=no
5414 gcc_cv_ld_as_needed_option='--as-needed'
5415 gcc_cv_ld_no_as_needed_option='--no-as-needed'
5416 if test $in_tree_ld = yes ; then
5417   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5418      && test $in_tree_ld_is_elf = yes; then
5419     gcc_cv_ld_as_needed=yes
5420   fi
5421 elif test x$gcc_cv_ld != x; then
5422   # Check if linker supports --as-needed and --no-as-needed options
5423   if $gcc_cv_ld --help 2>&1 | grep as-needed > /dev/null; then
5424     gcc_cv_ld_as_needed=yes
5425   fi
5426   case "$target:$gnu_ld" in
5427     *-*-solaris2*:no)
5428       # Solaris 2 ld always supports -z ignore/-z record.  Prefer the native
5429       # forms.
5430       gcc_cv_ld_as_needed=yes
5431       gcc_cv_ld_as_needed_option="-z ignore"
5432       gcc_cv_ld_no_as_needed_option="-z record"
5433       ;;
5434   esac
5435 fi
5436 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
5437 # dl_iterate_phdr, i.e. since Solaris 11.
5438 case "$target" in
5439   *-*-solaris2.1[[1-9]]*)
5440     case "$target" in
5441     i?86-*-* | x86_64-*-*)
5442       if echo "$ld_ver" | grep GNU > /dev/null; then
5443         # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
5444         gcc_cv_ld_as_needed=no
5445       fi
5446       ;;
5447     esac
5448     ;;
5449   *-*-solaris2*)
5450     gcc_cv_ld_as_needed=no
5451     ;;
5452 esac
5453 ])
5454 if test x"$gcc_cv_ld_as_needed" = xyes; then
5455         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
5456 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
5457         AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
5458 [Define to the linker option to ignore unused dependencies.])
5459         AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
5460 [Define to the linker option to keep unused dependencies.])
5461 fi
5462
5463 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
5464 saved_LDFLAGS="$LDFLAGS"
5465 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
5466   LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
5467   AC_LINK_IFELSE([int main(void) {return 0;}],
5468     [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
5469 done
5470 LDFLAGS="$saved_LDFLAGS"
5471 if test "x$gcc_cv_ld_clearcap" = xyes; then
5472   AC_DEFINE([HAVE_LD_CLEARCAP], 1,
5473 [Define if the linker supports clearing hardware capabilities via mapfile.])
5474   AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
5475 fi
5476 AC_MSG_RESULT($gcc_cv_ld_clearcap)
5477
5478 case "$target" in
5479   powerpc*-*-*)
5480     case "$target" in
5481       *le-*-linux*)
5482         emul_name="-melf32lppc"
5483         ;;
5484       *)
5485         emul_name="-melf32ppc"
5486         ;;
5487     esac
5488     AC_CACHE_CHECK(linker .gnu.attributes long double support,
5489     gcc_cv_ld_ppc_attr,
5490     [gcc_cv_ld_ppc_attr=no
5491     if test x"$ld_is_gold" = xyes; then
5492       gcc_cv_ld_ppc_attr=yes
5493     elif test $in_tree_ld = yes ; then
5494       if test "$gcc_cv_gld_major_version" -eq 2 \
5495                 -a "$gcc_cv_gld_minor_version" -ge 28 \
5496                 -o "$gcc_cv_gld_major_version" -gt 2; then
5497         gcc_cv_ld_ppc_attr=yes
5498       fi
5499     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5500       # check that merging the long double .gnu_attribute doesn't warn
5501       cat > conftest1.s <<EOF
5502         .gnu_attribute 4,1
5503 EOF
5504       cat > conftest2.s <<EOF
5505         .gnu_attribute 4,9
5506 EOF
5507       if $gcc_cv_as -a32 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5508          && $gcc_cv_as -a32 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5509          && $gcc_cv_ld $emul_name -r -o conftest.o conftest1.o conftest2.o > /dev/null 2> conftest.err \
5510          && test ! -s conftest.err; then
5511         gcc_cv_ld_ppc_attr=yes
5512       fi
5513       rm -f conftest.err conftest.o conftest1.o conftest2.o conftest1.s conftest2.s
5514     fi
5515     ])
5516     if test x$gcc_cv_ld_ppc_attr = xyes; then
5517       AC_DEFINE(HAVE_LD_PPC_GNU_ATTR_LONG_DOUBLE, 1,
5518     [Define if your PowerPC linker has .gnu.attributes long double support.])
5519     fi
5520     ;;
5521 esac
5522
5523 case "$target:$tm_file" in
5524   powerpc64-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
5525   case "$target" in
5526      *le-*-linux*)
5527      emul_name="-melf64lppc"
5528       ;;
5529      *-*-linux*)
5530      emul_name="-melf64ppc"
5531       ;;
5532      *-*-freebsd*)
5533      emul_name="-melf64ppc_fbsd"
5534       ;;
5535   esac
5536     AC_CACHE_CHECK(linker support for omitting dot symbols,
5537     gcc_cv_ld_no_dot_syms,
5538     [gcc_cv_ld_no_dot_syms=no
5539     if test x"$ld_is_gold" = xyes; then
5540       gcc_cv_ld_no_dot_syms=yes
5541     elif test $in_tree_ld = yes ; then
5542       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
5543         gcc_cv_ld_no_dot_syms=yes
5544       fi
5545     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5546       cat > conftest1.s <<EOF
5547         .text
5548         bl .foo
5549 EOF
5550       cat > conftest2.s <<EOF
5551         .section ".opd","aw"
5552         .align 3
5553         .globl foo
5554         .type foo,@function
5555 foo:
5556         .quad .LEfoo,.TOC.@tocbase,0
5557         .text
5558 .LEfoo:
5559         blr
5560         .size foo,.-.LEfoo
5561 EOF
5562       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5563          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5564          && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
5565         gcc_cv_ld_no_dot_syms=yes
5566       fi
5567       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
5568     fi
5569     ])
5570     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
5571       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
5572     [Define if your PowerPC64 linker only needs function descriptor syms.])
5573     fi
5574
5575     AC_CACHE_CHECK(linker large toc support,
5576     gcc_cv_ld_large_toc,
5577     [gcc_cv_ld_large_toc=no
5578     if test x"$ld_is_gold" = xyes; then
5579       gcc_cv_ld_large_toc=yes
5580     elif test $in_tree_ld = yes ; then
5581       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
5582         gcc_cv_ld_large_toc=yes
5583       fi
5584     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5585       cat > conftest.s <<EOF
5586         .section ".tbss","awT",@nobits
5587         .align 3
5588 ie0:    .space 8
5589         .global _start
5590         .text
5591 _start:
5592         addis 9,13,ie0@got@tprel@ha
5593         ld 9,ie0@got@tprel@l(9)
5594 EOF
5595       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5596          && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
5597         gcc_cv_ld_large_toc=yes
5598       fi
5599       rm -f conftest conftest.o conftest.s
5600     fi
5601     ])
5602     if test x"$gcc_cv_ld_large_toc" = xyes; then
5603       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5604     [Define if your PowerPC64 linker supports a large TOC.])
5605     fi
5606
5607     AC_CACHE_CHECK(linker toc pointer alignment,
5608     gcc_cv_ld_toc_align,
5609     [if test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_nm != x; then
5610       cat > conftest.s <<EOF
5611         .global _start
5612         .text
5613 _start:
5614         addis 9,2,x@got@ha
5615         .section .data.rel.ro,"aw",@progbits
5616         .p2align 16
5617         .space 32768
5618 x:      .quad .TOC.
5619 EOF
5620       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5621          && $gcc_cv_ld $emul_name -z norelro -o conftest conftest.o > /dev/null 2>&1; then
5622         gcc_cv_ld_toc_align=`$gcc_cv_nm conftest | ${AWK} '/\.TOC\./ { match ($0, "0[[[:xdigit:]]]*", a); print strtonum ("0x" substr(a[[0]], length(a[[0]])-3)) }'`
5623       fi
5624       rm -f conftest conftest.o conftest.s
5625     fi
5626     ])
5627     if test -n "$gcc_cv_ld_toc_align" && test $gcc_cv_ld_toc_align -gt 8; then
5628       AC_DEFINE_UNQUOTED(POWERPC64_TOC_POINTER_ALIGNMENT, $gcc_cv_ld_toc_align,
5629     [Define to .TOC. alignment forced by your linker.])
5630     fi
5631     ;;
5632 esac
5633
5634 case "$target" in
5635   *-*-aix*)
5636     AC_CACHE_CHECK(linker large toc support,
5637     gcc_cv_ld_large_toc,
5638     [gcc_cv_ld_large_toc=no
5639     if test x$gcc_cv_as != x ; then
5640       cat > conftest.s <<EOF
5641         .toc
5642 LC..1:
5643         .tc a[[TC]],a[[RW]]
5644         .extern a[[RW]]
5645         .csect .text[[PR]]
5646 .largetoctest:
5647         addis 9,LC..1@u(2)
5648         ld 3,LC..1@l(9)
5649 EOF
5650       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
5651         gcc_cv_ld_large_toc=yes
5652       fi
5653       rm -f conftest conftest.o conftest.s
5654     fi
5655     ])
5656     if test x"$gcc_cv_ld_large_toc" = xyes; then
5657       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5658     [Define if your PowerPC64 linker supports a large TOC.])
5659     fi
5660     ;;
5661 esac
5662
5663 AC_CACHE_CHECK(linker --build-id support,
5664   gcc_cv_ld_buildid,
5665   [gcc_cv_ld_buildid=no
5666   if test $in_tree_ld = yes ; then
5667     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5668        "$gcc_cv_gld_minor_version" -ge 18 -o \
5669        "$gcc_cv_gld_major_version" -gt 2 \
5670        && test $in_tree_ld_is_elf = yes; then
5671       gcc_cv_ld_buildid=yes
5672     fi
5673   elif test x$gcc_cv_ld != x; then
5674     if $gcc_cv_ld --help 2>&1 | grep build-id > /dev/null; then
5675       gcc_cv_ld_buildid=yes
5676     fi
5677   fi])
5678 if test x"$gcc_cv_ld_buildid" = xyes; then
5679   AC_DEFINE(HAVE_LD_BUILDID, 1,
5680   [Define if your linker supports --build-id.])
5681 fi
5682
5683 AC_ARG_ENABLE(linker-build-id,
5684 [AS_HELP_STRING([--enable-linker-build-id],
5685                 [compiler will always pass --build-id to linker])],
5686 [],
5687 enable_linker_build_id=no)
5688
5689 if test x"$enable_linker_build_id" = xyes; then
5690   if test x"$gcc_cv_ld_buildid" = xyes; then
5691     AC_DEFINE(ENABLE_LD_BUILDID, 1,
5692     [Define if gcc should always pass --build-id to linker.])
5693   else
5694     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
5695   fi
5696 fi
5697
5698 # In binutils 2.21, GNU ld gained support for new emulations fully
5699 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
5700 AC_CACHE_CHECK(linker *_sol2 emulation support,
5701   gcc_cv_ld_sol2_emulation,
5702   [gcc_cv_ld_sol2_emulation=no
5703   if test $in_tree_ld = yes ; then
5704     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5705        "$gcc_cv_gld_minor_version" -ge 21 -o \
5706        "$gcc_cv_gld_major_version" -gt 2 \
5707        && test $in_tree_ld_is_elf = yes; then
5708       gcc_cv_ld_sol2_emulation=yes
5709     fi
5710   elif test x$gcc_cv_ld != x; then
5711     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
5712        grep _sol2 > /dev/null; then
5713       gcc_cv_ld_sol2_emulation=yes
5714     fi
5715   fi])
5716 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
5717   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
5718   [Define if your linker supports the *_sol2 emulations.])
5719 fi
5720
5721 AC_CACHE_CHECK(linker --sysroot support,
5722   gcc_cv_ld_sysroot,
5723   [gcc_cv_ld_sysroot=no
5724   if test $in_tree_ld = yes ; then
5725       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
5726         gcc_cv_ld_sysroot=yes
5727       fi
5728   elif test x$gcc_cv_ld != x; then
5729     if $gcc_cv_ld --help 2>&1 | grep sysroot > /dev/null; then
5730       gcc_cv_ld_sysroot=yes
5731     fi
5732   fi])
5733 if test x"$gcc_cv_ld_sysroot" = xyes; then
5734   AC_DEFINE(HAVE_LD_SYSROOT, 1,
5735   [Define if your linker supports --sysroot.])
5736 fi
5737
5738 case $target in
5739 *-*-solaris2*)
5740   # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
5741   AC_CACHE_CHECK([system-provided CRTs on Solaris],
5742     gcc_cv_solaris_crts,
5743     [gcc_cv_solaris_crts=no
5744      if test x$host != x$target; then
5745        if test "x$with_sysroot" = xyes; then
5746          target_sysroot="${test_exec_prefix}/${target_noncanonical}/sys-root"
5747        else
5748          target_sysroot="${with_sysroot}"
5749        fi
5750      fi
5751      target_libdir="$target_sysroot/usr/lib"
5752      # At the time they were added, gcrt1.o became a symlink for backwards
5753      # compatibility on x86, while crt1.o was added on sparc, so check for that.
5754      case $target in
5755        i?86-*-solaris2* | x86_64-*-solaris2*)
5756          if test -h "$target_libdir/gcrt1.o"; then gcc_cv_solaris_crts=yes; fi
5757          ;;
5758        sparc*-*-solaris2*)
5759          if test -f "$target_libdir/crt1.o"; then gcc_cv_solaris_crts=yes; fi
5760          ;;
5761      esac])
5762   ;;
5763 esac
5764 if test x$gcc_cv_solaris_crts = xyes; then
5765   AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
5766             [Define if the system-provided CRTs are present on Solaris.])
5767 fi
5768
5769 AC_ARG_ENABLE(libssp,
5770 [AS_HELP_STRING([--enable-libssp], [enable linking against libssp])],
5771 [case "${enableval}" in
5772   yes|no)
5773     ;;
5774   *)
5775     AC_MSG_ERROR([unknown libssp setting $enableval])
5776     ;;
5777 esac], [])
5778
5779 # Test for stack protector support in target C library.
5780 AC_CACHE_CHECK(__stack_chk_fail in target C library,
5781   gcc_cv_libc_provides_ssp,
5782   [gcc_cv_libc_provides_ssp=no
5783   if test "x$enable_libssp" = "xno"; then
5784     gcc_cv_libc_provides_ssp=yes
5785   elif test "x$enable_libssp" = "xyes"; then
5786     gcc_cv_libc_provides_ssp=no
5787   else
5788     case "$target" in
5789        *-*-musl*)
5790          # All versions of musl provide stack protector
5791          gcc_cv_libc_provides_ssp=yes;;
5792        *-*-linux* | *-*-kfreebsd*-gnu)
5793       # glibc 2.4 and later provides __stack_chk_fail and
5794       # either __stack_chk_guard, or TLS access to stack guard canary.
5795       GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
5796       [if test -f $target_header_dir/features.h \
5797          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
5798             $target_header_dir/features.h > /dev/null; then
5799         if $EGREP '^[   ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
5800              $target_header_dir/features.h > /dev/null && \
5801              test -f $target_header_dir/bits/uClibc_config.h && \
5802              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
5803              $target_header_dir/bits/uClibc_config.h > /dev/null; then
5804           gcc_cv_libc_provides_ssp=yes
5805         fi
5806       # all versions of Bionic support stack protector
5807       elif test -f $target_header_dir/sys/cdefs.h \
5808         && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
5809            $target_header_dir/sys/cdefs.h > /dev/null; then
5810          gcc_cv_libc_provides_ssp=yes
5811       fi]])
5812         ;;
5813        *-*-gnu*)
5814          # Avoid complicated tests (see
5815          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
5816          # simply assert that glibc does provide this, which is true for all
5817          # realistically usable GNU/Hurd configurations.
5818          # All supported versions of musl provide it as well
5819          gcc_cv_libc_provides_ssp=yes;;
5820        *-*-darwin* | *-*-freebsd* | *-*-netbsd*)
5821          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
5822            [echo "no __stack_chk_fail on this target"])
5823         ;;
5824        *) gcc_cv_libc_provides_ssp=no ;;
5825     esac
5826   fi])
5827
5828 if test x$gcc_cv_libc_provides_ssp = xyes; then
5829   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
5830             [Define if your target C library provides stack protector support])
5831 fi
5832
5833 # Check whether --enable-default-ssp was given.
5834 AC_ARG_ENABLE(default-ssp,
5835 [AS_HELP_STRING([--enable-default-ssp],
5836   [enable Stack Smashing Protection as default])],[
5837 if test x$gcc_cv_libc_provides_ssp = xyes; then
5838   case "$target" in
5839     ia64*-*-*) enable_default_ssp=no ;;
5840     *) enable_default_ssp=$enableval ;;
5841   esac
5842 else
5843   enable_default_ssp=no
5844 fi],
5845 enable_default_ssp=no)
5846 if test x$enable_default_ssp = xyes ; then
5847   AC_DEFINE(ENABLE_DEFAULT_SSP, 1,
5848       [Define if your target supports default stack protector and it is enabled.])
5849 fi
5850 AC_SUBST([enable_default_ssp])
5851
5852 # Test for <sys/sdt.h> on the target.
5853 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
5854 AC_MSG_CHECKING(sys/sdt.h in the target C library)
5855 have_sys_sdt_h=no
5856 if test -f $target_header_dir/sys/sdt.h; then
5857   have_sys_sdt_h=yes
5858   AC_DEFINE(HAVE_SYS_SDT_H, 1,
5859             [Define if your target C library provides sys/sdt.h])
5860 fi
5861 AC_MSG_RESULT($have_sys_sdt_h)
5862
5863 # Check if TFmode long double should be used by default or not.
5864 # Some glibc targets used DFmode long double, but with glibc 2.4
5865 # and later they can use TFmode.
5866 case "$target" in
5867   powerpc*-*-linux* | \
5868   sparc*-*-linux* | \
5869   s390*-*-linux* | \
5870   alpha*-*-linux*)
5871     AC_ARG_WITH(long-double-128,
5872       [AS_HELP_STRING([--with-long-double-128],
5873                       [use 128-bit long double by default])],
5874       gcc_cv_target_ldbl128="$with_long_double_128",
5875       [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
5876       [gcc_cv_target_ldbl128=no
5877       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
5878         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
5879       && gcc_cv_target_ldbl128=yes
5880       ]])])
5881     ;;
5882 esac
5883 if test x$gcc_cv_target_ldbl128 = xyes; then
5884   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
5885             [Define if TFmode long double should be the default])
5886 fi
5887
5888 # Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
5889 # values in the TCB.  Currently, only GLIBC 2.23 and later support this.
5890 gcc_cv_libc_provides_hwcap_in_tcb=no
5891 case "$target" in
5892   powerpc*-*-linux*)
5893     GCC_GLIBC_VERSION_GTE_IFELSE([2], [23], [gcc_cv_libc_provides_hwcap_in_tcb=yes], )
5894     ;;
5895 esac
5896 if test x$gcc_cv_libc_provides_hwcap_in_tcb = xyes; then
5897   AC_DEFINE(TARGET_LIBC_PROVIDES_HWCAP_IN_TCB, 1,
5898             [Define if your target C Library provides the AT_HWCAP value in the TCB])
5899 fi
5900
5901 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
5902 gcc_cv_target_dl_iterate_phdr=unknown
5903 case "$target" in
5904   # Restrict to Solaris 11+.  While most of the Solaris 11 linker changes
5905   # were backported to Solaris 10 Update 10, dl_iterate_phdr only lives in
5906   # libdl there, both complicating its use and breaking compatibility
5907   # between Solaris 10 updates.
5908   *-*-solaris2.1[[1-9]]*)
5909     # <link.h> needs both a dl_iterate_phdr declaration and support for
5910     # compilation with largefile support.
5911     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
5912       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
5913       gcc_cv_target_dl_iterate_phdr=yes
5914     else
5915       gcc_cv_target_dl_iterate_phdr=no
5916     fi
5917     ;;
5918   *-*-dragonfly* | *-*-freebsd*)
5919     if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
5920       gcc_cv_target_dl_iterate_phdr=yes
5921     else
5922       gcc_cv_target_dl_iterate_phdr=no
5923     fi
5924     ;;
5925   *-linux-musl*)
5926     gcc_cv_target_dl_iterate_phdr=yes
5927     ;;
5928 esac
5929 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
5930 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
5931    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
5932 [Define if your target C library provides the `dl_iterate_phdr' function.])
5933 fi
5934 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
5935
5936 # We no longer support different GC mechanisms.  Emit an error if
5937 # the user configures with --with-gc.
5938 AC_ARG_WITH(gc,
5939 [AS_HELP_STRING([--with-gc={page,zone}],
5940                 [this option is not supported anymore.  It used to choose
5941                  the garbage collection mechanism to use with the compiler])],
5942 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
5943 [])
5944
5945 # Libraries to use on the host.  This will normally be set by the top
5946 # level Makefile.  Here we simply capture the value for our Makefile.
5947 if test -z "${HOST_LIBS+set}"; then
5948   HOST_LIBS=
5949 fi
5950 AC_SUBST(HOST_LIBS)
5951
5952 # Use the system's zlib library.
5953 AM_ZLIB
5954
5955 dnl Very limited version of automake's enable-maintainer-mode
5956
5957 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
5958   dnl maintainer-mode is disabled by default
5959   AC_ARG_ENABLE(maintainer-mode,
5960 [AS_HELP_STRING([--enable-maintainer-mode],
5961                 [enable make rules and dependencies not useful
5962                  (and sometimes confusing) to the casual installer])],
5963       maintainer_mode=$enableval,
5964       maintainer_mode=no)
5965
5966 AC_MSG_RESULT($maintainer_mode)
5967
5968 if test "$maintainer_mode" = "yes"; then
5969   MAINT=''
5970 else
5971   MAINT='#'
5972 fi
5973 AC_SUBST(MAINT)dnl
5974
5975 dnl Whether to prevent multiple front-ends from linking at the same time
5976
5977 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
5978   AC_ARG_ENABLE(link-mutex,
5979 [AS_HELP_STRING([--enable-link-mutex],
5980                 [avoid linking multiple front-ends at once to avoid thrashing
5981                  on the build machine])],
5982       do_link_mutex=$enableval,
5983       do_link_mutex=no)
5984 AC_MSG_RESULT($do_link_mutex)
5985
5986 if test "$do_link_mutex" = "yes"; then
5987    DO_LINK_MUTEX=true
5988 else
5989    DO_LINK_MUTEX=false
5990 fi
5991 AC_SUBST(DO_LINK_MUTEX)
5992
5993 # --------------
5994 # Language hooks
5995 # --------------
5996
5997 # Make empty files to contain the specs and options for each language.
5998 # Then add #include lines to for a compiler that has specs and/or options.
5999
6000 subdirs=
6001 lang_opt_files=
6002 lang_specs_files=
6003 lang_tree_files=
6004 # These (without "all_") are set in each config-lang.in.
6005 # `language' must be a single word so is spelled singularly.
6006 all_languages=
6007 all_compilers=
6008 all_outputs='Makefile'
6009 # List of language makefile fragments.
6010 all_lang_makefrags=
6011 # Additional files for gengtype
6012 all_gtfiles="$target_gtfiles"
6013
6014 # These are the languages that are set in --enable-languages,
6015 # and are available in the GCC tree.
6016 all_selected_languages=
6017
6018 # Add the language fragments.
6019 # Languages are added via two mechanisms.  Some information must be
6020 # recorded in makefile variables, these are defined in config-lang.in.
6021 # We accumulate them and plug them into the main Makefile.
6022 # The other mechanism is a set of hooks for each of the main targets
6023 # like `clean', `install', etc.
6024
6025 language_hooks="Make-hooks"
6026
6027 for lang in ${srcdir}/*/config-lang.in
6028 do
6029 changequote(,)dnl
6030         test "$lang" = "${srcdir}/*/config-lang.in" && continue
6031
6032         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
6033         if test "x$lang_alias" = x
6034         then
6035               echo "$lang doesn't set \$language." 1>&2
6036               exit 1
6037         fi
6038         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
6039         subdirs="$subdirs $subdir"
6040
6041         # $gcc_subdir is where the gcc integration files are to be found
6042         # for a language, both for internal compiler purposes (compiler
6043         # sources implementing front-end to GCC tree converters), and for
6044         # build infrastructure purposes (Make-lang.in, etc.)
6045         #
6046         # This will be <subdir> (relative to $srcdir) if a line like
6047         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
6048         # is found in <langdir>/config-lang.in, and will remain <langdir>
6049         # otherwise.
6050         #
6051         # Except for the language alias (fetched above), the regular
6052         # "config-lang.in" contents are always retrieved from $gcc_subdir,
6053         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
6054         # only this and the language alias.
6055
6056         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
6057         if [ "$gcc_subdir" = "" ]; then
6058            gcc_subdir="$subdir"
6059         fi
6060
6061         case ",$enable_languages," in
6062         *,$lang_alias,*)
6063             all_selected_languages="$all_selected_languages $lang_alias"
6064             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
6065                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
6066             fi
6067             ;;
6068         esac
6069 changequote([,])dnl
6070
6071         language=
6072         boot_language=
6073         compilers=
6074         outputs=
6075         gtfiles=
6076         subdir_requires=
6077         . ${srcdir}/$gcc_subdir/config-lang.in
6078         if test "x$language" = x
6079         then
6080                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
6081                 exit 1
6082         fi
6083
6084         ok=:
6085         case ",$enable_languages," in
6086                 *,$lang_alias,*) ;;
6087                 *)
6088                         for i in $subdir_requires; do
6089                                 test -f "${srcdir}/$i/config-lang.in" && continue
6090                                 ok=false
6091                                 break
6092                         done
6093                 ;;
6094         esac
6095         $ok || continue
6096
6097         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
6098         if test -f $srcdir/$gcc_subdir/lang.opt; then
6099             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
6100             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
6101         fi
6102         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
6103             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
6104         fi
6105         all_languages="$all_languages $language"
6106         all_compilers="$all_compilers $compilers"
6107         all_outputs="$all_outputs $outputs"
6108         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
6109         case ",$enable_languages," in
6110                 *,lto,*)
6111                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
6112                     enable_lto=yes
6113                     AC_SUBST(enable_lto)
6114                     ;;
6115                 *) ;;
6116         esac
6117 done
6118
6119 check_languages=
6120 for language in $all_selected_languages
6121 do
6122         check_languages="$check_languages check-$language"
6123 done
6124
6125 # We link each language in with a set of hooks, reached indirectly via
6126 # lang.${target}.  Only do so for selected languages.
6127
6128 rm -f Make-hooks
6129 touch Make-hooks
6130 target_list="all.cross start.encap rest.encap tags \
6131         install-common install-man install-info install-pdf install-html dvi \
6132         pdf html uninstall info man srcextra srcman srcinfo \
6133         mostlyclean clean distclean maintainer-clean install-plugin"
6134
6135 for t in $target_list
6136 do
6137         x=
6138         for lang in $all_selected_languages
6139         do
6140                 x="$x $lang.$t"
6141         done
6142         echo "lang.$t: $x" >> Make-hooks
6143 done
6144
6145 # --------
6146 # Option include files
6147 # --------
6148
6149 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
6150 option_includes="option-includes.mk"
6151 AC_SUBST_FILE(option_includes)
6152
6153 # --------
6154 # UNSORTED
6155 # --------
6156
6157 # Create .gdbinit.
6158
6159 echo "dir ." > .gdbinit
6160 echo "dir ${srcdir}" >> .gdbinit
6161 if test x$gdb_needs_out_file_path = xyes
6162 then
6163         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
6164 fi
6165 if test "x$subdirs" != x; then
6166         for s in $subdirs
6167         do
6168                 echo "dir ${srcdir}/$s" >> .gdbinit
6169         done
6170 fi
6171 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
6172 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
6173
6174 # Put a breakpoint on __asan_report_error to help with debugging buffer
6175 # overflow.
6176 case "$CFLAGS" in
6177 *-fsanitize=address*)
6178   echo "source ${srcdir}/gdbasan.in" >> .gdbinit
6179   ;;
6180 esac
6181
6182 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
6183 AC_SUBST(gcc_tooldir)
6184 AC_SUBST(dollar)
6185
6186 # Find a directory in which to install a shared libgcc.
6187
6188 AC_ARG_ENABLE(version-specific-runtime-libs,
6189 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
6190                 [specify that runtime libraries should be
6191                  installed in a compiler-specific directory])])
6192
6193 # Substitute configuration variables
6194 AC_SUBST(subdirs)
6195 AC_SUBST(srcdir)
6196 AC_SUBST(all_compilers)
6197 AC_SUBST(all_gtfiles)
6198 AC_SUBST(all_lang_makefrags)
6199 AC_SUBST(all_languages)
6200 AC_SUBST(all_selected_languages)
6201 AC_SUBST(build_exeext)
6202 AC_SUBST(build_install_headers_dir)
6203 AC_SUBST(build_xm_file_list)
6204 AC_SUBST(build_xm_include_list)
6205 AC_SUBST(build_xm_defines)
6206 AC_SUBST(build_file_translate)
6207 AC_SUBST(check_languages)
6208 AC_SUBST(cpp_install_dir)
6209 AC_SUBST(xmake_file)
6210 AC_SUBST(tmake_file)
6211 AC_SUBST(TM_ENDIAN_CONFIG)
6212 AC_SUBST(TM_MULTILIB_CONFIG)
6213 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
6214 AC_SUBST(extra_gcc_objs)
6215 AC_SUBST(user_headers_inc_next_pre)
6216 AC_SUBST(user_headers_inc_next_post)
6217 AC_SUBST(extra_headers_list)
6218 AC_SUBST(extra_objs)
6219 AC_SUBST(extra_programs)
6220 AC_SUBST(float_h_file)
6221 AC_SUBST(gcc_config_arguments)
6222 AC_SUBST(gcc_gxx_include_dir)
6223 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
6224 AC_SUBST(host_exeext)
6225 AC_SUBST(host_xm_file_list)
6226 AC_SUBST(host_xm_include_list)
6227 AC_SUBST(host_xm_defines)
6228 AC_SUBST(out_host_hook_obj)
6229 AC_SUBST(install)
6230 AC_SUBST(lang_opt_files)
6231 AC_SUBST(lang_specs_files)
6232 AC_SUBST(lang_tree_files)
6233 AC_SUBST(local_prefix)
6234 AC_SUBST(md_file)
6235 AC_SUBST(objc_boehm_gc)
6236 AC_SUBST(out_file)
6237 AC_SUBST(out_object_file)
6238 AC_SUBST(common_out_file)
6239 AC_SUBST(common_out_object_file)
6240 AC_SUBST(tm_file_list)
6241 AC_SUBST(tm_include_list)
6242 AC_SUBST(tm_defines)
6243 AC_SUBST(tm_p_file_list)
6244 AC_SUBST(tm_p_include_list)
6245 AC_SUBST(xm_file_list)
6246 AC_SUBST(xm_include_list)
6247 AC_SUBST(xm_defines)
6248 AC_SUBST(use_gcc_stdint)
6249 AC_SUBST(c_target_objs)
6250 AC_SUBST(cxx_target_objs)
6251 AC_SUBST(fortran_target_objs)
6252 AC_SUBST(target_cpu_default)
6253
6254 AC_SUBST_FILE(language_hooks)
6255
6256 # Echo link setup.
6257 if test x${build} = x${host} ; then
6258   if test x${host} = x${target} ; then
6259     echo "Links are now set up to build a native compiler for ${target}." 1>&2
6260   else
6261     echo "Links are now set up to build a cross-compiler" 1>&2
6262     echo " from ${host} to ${target}." 1>&2
6263   fi
6264 else
6265   if test x${host} = x${target} ; then
6266     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
6267     echo " for ${target}." 1>&2
6268   else
6269     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
6270     echo " from ${host} to ${target}." 1>&2
6271   fi
6272 fi
6273
6274 AC_ARG_VAR(GMPLIBS,[How to link GMP])
6275 AC_ARG_VAR(GMPINC,[How to find GMP include files])
6276
6277 AC_ARG_VAR(ISLLIBS,[How to link isl])
6278 AC_ARG_VAR(ISLINC,[How to find isl include files])
6279 if test "x${ISLLIBS}" != "x" ; then
6280    AC_DEFINE(HAVE_isl, 1, [Define if isl is in use.])
6281 fi
6282
6283 GCC_ENABLE_PLUGINS
6284 AC_SUBST(pluginlibs)
6285 AC_SUBST(enable_plugin)
6286 if test x"$enable_plugin" = x"yes"; then
6287   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
6288 fi
6289
6290
6291 # Enable --enable-host-shared
6292 AC_ARG_ENABLE(host-shared,
6293 [AS_HELP_STRING([--enable-host-shared],
6294                 [build host code as shared libraries])],
6295 [PICFLAG=-fPIC], [PICFLAG=])
6296 AC_SUBST(enable_host_shared)
6297 AC_SUBST(PICFLAG)
6298
6299
6300 AC_ARG_ENABLE(libquadmath-support,
6301 [AS_HELP_STRING([--disable-libquadmath-support],
6302   [disable libquadmath support for Fortran])],
6303 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
6304 ENABLE_LIBQUADMATH_SUPPORT=yes)
6305 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
6306   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
6307             [Define to 1 to enable libquadmath support])
6308 fi
6309
6310
6311 # Specify what hash style to use by default.
6312 AC_ARG_WITH([linker-hash-style],
6313 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
6314                 [specify the linker hash style])],
6315 [case x"$withval" in
6316    xsysv)
6317      LINKER_HASH_STYLE=sysv
6318      ;;
6319    xgnu)
6320      LINKER_HASH_STYLE=gnu
6321      ;;
6322    xboth)
6323      LINKER_HASH_STYLE=both
6324      ;;
6325    *)
6326      AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
6327      ;;
6328  esac],
6329 [LINKER_HASH_STYLE=''])
6330 if test x"${LINKER_HASH_STYLE}" != x; then
6331   AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
6332                                          [The linker hash style])
6333 fi
6334
6335 # Specify what should be the default of -fdiagnostics-color option.
6336 AC_ARG_WITH([diagnostics-color],
6337 [AC_HELP_STRING([--with-diagnostics-color={never,auto,auto-if-env,always}],
6338                 [specify the default of -fdiagnostics-color option
6339                  auto-if-env stands for -fdiagnostics-color=auto if
6340                  GCC_COLOR environment variable is present and
6341                  -fdiagnostics-color=never otherwise])],
6342 [case x"$withval" in
6343    xnever)
6344      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_NO
6345      ;;
6346    xauto)
6347      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO
6348      ;;
6349    xauto-if-env)
6350      DIAGNOSTICS_COLOR_DEFAULT=-1
6351      ;;
6352    xalways)
6353      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_YES
6354      ;;
6355    *)
6356      AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-color])
6357      ;;
6358  esac],
6359 [DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO])
6360 AC_DEFINE_UNQUOTED(DIAGNOSTICS_COLOR_DEFAULT, $DIAGNOSTICS_COLOR_DEFAULT,
6361                    [The default for -fdiagnostics-color option])
6362
6363 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
6364 # of jit/jit-playback.c.
6365 cat > gcc-driver-name.h <<EOF
6366 #define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_BASEVER}${exeext}"
6367 EOF
6368
6369 # Check whether --enable-default-pie was given.
6370 AC_ARG_ENABLE(default-pie,
6371 [AS_HELP_STRING([--enable-default-pie],
6372   [enable Position Independent Executable as default])],
6373 enable_default_pie=$enableval,
6374 enable_default_pie=no)
6375 if test x$enable_default_pie = xyes ; then
6376   AC_DEFINE(ENABLE_DEFAULT_PIE, 1,
6377       [Define if your target supports default PIE and it is enabled.])
6378 fi
6379 AC_SUBST([enable_default_pie])
6380
6381 # Check if -fno-PIE works.
6382 AC_CACHE_CHECK([for -fno-PIE option],
6383   [gcc_cv_c_no_fpie],
6384   [saved_CXXFLAGS="$CXXFLAGS"
6385    CXXFLAGS="$CXXFLAGS -fno-PIE"
6386    AC_COMPILE_IFELSE([int main(void) {return 0;}],
6387      [gcc_cv_c_no_fpie=yes],
6388      [gcc_cv_c_no_fpie=no])
6389    CXXFLAGS="$saved_CXXFLAGS"])
6390 if test "$gcc_cv_c_no_fpie" = "yes"; then
6391   NO_PIE_CFLAGS="-fno-PIE"
6392 fi
6393 AC_SUBST([NO_PIE_CFLAGS])
6394
6395 # Check if -no-pie works.
6396 AC_CACHE_CHECK([for -no-pie option],
6397   [gcc_cv_no_pie],
6398   [saved_LDFLAGS="$LDFLAGS"
6399    LDFLAGS="$LDFLAGS -no-pie"
6400    AC_LINK_IFELSE([int main(void) {return 0;}],
6401      [gcc_cv_no_pie=yes],
6402      [gcc_cv_no_pie=no])
6403    LDFLAGS="$saved_LDFLAGS"])
6404 if test "$gcc_cv_no_pie" = "yes"; then
6405   NO_PIE_FLAG="-no-pie"
6406 fi
6407 AC_SUBST([NO_PIE_FLAG])
6408
6409 # Check linker supports '-z bndplt'
6410 ld_bndplt_support=no
6411 AC_MSG_CHECKING(linker -z bndplt option)
6412 if test x"$ld_is_gold" = xno; then
6413   if test $in_tree_ld = yes ; then
6414     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6415       ld_bndplt_support=yes
6416     fi
6417   elif test x$gcc_cv_ld != x; then
6418     # Check if linker supports -a bndplt option
6419     if $gcc_cv_ld --help 2>&1 | grep -- '-z bndplt' > /dev/null; then
6420       ld_bndplt_support=yes
6421     fi
6422   fi
6423 fi
6424 if test x"$ld_bndplt_support" = xyes; then
6425   AC_DEFINE(HAVE_LD_BNDPLT_SUPPORT, 1,
6426         [Define if your linker supports -z bndplt])
6427 fi
6428 AC_MSG_RESULT($ld_bndplt_support)
6429
6430 # Check linker supports '--push-state'/'--pop-state'
6431 ld_pushpopstate_support=no
6432 AC_MSG_CHECKING(linker --push-state/--pop-state options)
6433 if test x"$ld_is_gold" = xno; then
6434   if test $in_tree_ld = yes ; then
6435     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6436       ld_pushpopstate_support=yes
6437     fi
6438   elif test x$gcc_cv_ld != x; then
6439     # Check if linker supports --push-state/--pop-state options
6440     if $gcc_cv_ld --help 2>&1 | grep -- '--push-state' > /dev/null; then
6441       ld_pushpopstate_support=yes
6442     fi
6443   fi
6444 fi
6445 if test x"$ld_pushpopstate_support" = xyes; then
6446   AC_DEFINE(HAVE_LD_PUSHPOPSTATE_SUPPORT, 1,
6447         [Define if your linker supports --push-state/--pop-state])
6448 fi
6449 AC_MSG_RESULT($ld_pushpopstate_support)
6450
6451 # Configure the subdirectories
6452 # AC_CONFIG_SUBDIRS($subdirs)
6453
6454 # Create the Makefile
6455 # and configure language subdirectories
6456 AC_CONFIG_FILES($all_outputs)
6457
6458 AC_CONFIG_COMMANDS([default],
6459 [
6460 case ${CONFIG_HEADERS} in
6461   *auto-host.h:config.in*)
6462   echo > cstamp-h ;;
6463 esac
6464 # Make sure all the subdirs exist.
6465 for d in $subdirs doc build common c-family
6466 do
6467     test -d $d || mkdir $d
6468 done
6469 ],
6470 [subdirs='$subdirs'])
6471 AC_OUTPUT
6472