gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright (C) 1997-2014 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 target name, for directory use.
  39 ACX_NONCANONICAL_TARGET
  40
  41 # Determine the target- and build-specific subdirectories
  42 GCC_TOPLEV_SUBDIRS
  43
  44 # Set program_transform_name
  45 AC_ARG_PROGRAM
  46
  47 # Check for bogus environment variables.
  48 # Test if LIBRARY_PATH contains the notation for the current directory
  49 # since this would lead to problems installing/building glibc.
  50 # LIBRARY_PATH contains the current directory if one of the following
  51 # is true:
  52 # - one of the terminals (":" and ";") is the first or last sign
  53 # - two terminals occur directly after each other
  54 # - the path contains an element with a dot in it
  55 AC_MSG_CHECKING(LIBRARY_PATH variable)
  56 changequote(,)dnl
  57 case ${LIBRARY_PATH} in
  58   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  59     library_path_setting="contains current directory"
  60     ;;
  61   *)
  62     library_path_setting="ok"
  63     ;;
  64 esac
  65 changequote([,])dnl
  66 AC_MSG_RESULT($library_path_setting)
  67 if test "$library_path_setting" != "ok"; then
  68 AC_MSG_ERROR([
  69 *** LIBRARY_PATH shouldn't contain the current directory when
  70 *** building gcc. Please change the environment variable
  71 *** and run configure again.])
  72 fi
  73
  74 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  75 # since this would lead to problems installing/building glibc.
  76 # GCC_EXEC_PREFIX contains the current directory if one of the following
  77 # is true:
  78 # - one of the terminals (":" and ";") is the first or last sign
  79 # - two terminals occur directly after each other
  80 # - the path contains an element with a dot in it
  81 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  82 changequote(,)dnl
  83 case ${GCC_EXEC_PREFIX} in
  84   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  85     gcc_exec_prefix_setting="contains current directory"
  86     ;;
  87   *)
  88     gcc_exec_prefix_setting="ok"
  89     ;;
  90 esac
  91 changequote([,])dnl
  92 AC_MSG_RESULT($gcc_exec_prefix_setting)
  93 if test "$gcc_exec_prefix_setting" != "ok"; then
  94 AC_MSG_ERROR([
  95 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
  96 *** building gcc. Please change the environment variable
  97 *** and run configure again.])
  98 fi
  99
 100 # -----------
 101 # Directories
 102 # -----------
 103
 104 # Specify the local prefix
 105 local_prefix=
 106 AC_ARG_WITH(local-prefix,
 107 [AS_HELP_STRING([--with-local-prefix=DIR],
 108                 [specifies directory to put local include])],
 109 [case "${withval}" in
 110 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 111 no)     ;;
 112 *)      local_prefix=$with_local_prefix ;;
 113 esac])
 114
 115 # Default local prefix if it is empty
 116 if test x$local_prefix = x; then
 117         local_prefix=/usr/local
 118 fi
 119
 120 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 121 # passed in by the toplevel make and thus we'd get different behavior
 122 # depending on where we built the sources.
 123 gcc_gxx_include_dir=
 124 # Specify the g++ header file directory
 125 AC_ARG_WITH(gxx-include-dir,
 126 [AS_HELP_STRING([--with-gxx-include-dir=DIR],
 127                 [specifies directory to put g++ header files])],
 128 [case "${withval}" in
 129 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 130 no)     ;;
 131 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 132 esac])
 133
 134 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 135 if test x${gcc_gxx_include_dir} = x; then
 136   if test x${enable_version_specific_runtime_libs} = xyes; then
 137     gcc_gxx_include_dir='${libsubdir}/include/c++'
 138   else
 139     libstdcxx_incdir='include/c++/$(version)'
 140     if test x$host != x$target; then
 141        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 142     fi
 143     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 144   fi
 145 fi
 146
 147 gcc_gxx_include_dir_add_sysroot=0
 148 if test "${with_sysroot+set}" = set; then
 149   gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 150   if test "${gcc_gxx_without_sysroot}"; then
 151     gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
 152     gcc_gxx_include_dir_add_sysroot=1
 153   fi
 154 fi
 155
 156 AC_ARG_WITH(cpp_install_dir,
 157 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
 158                 [install the user visible C preprocessor in DIR
 159                  (relative to PREFIX) as well as PREFIX/bin])],
 160 [if test x$withval = xyes; then
 161   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 162 elif test x$withval != xno; then
 163   cpp_install_dir=$withval
 164 fi])
 165
 166 # We would like to our source tree to be readonly.  However when releases or
 167 # pre-releases are generated, the flex/bison generated files as well as the
 168 # various formats of manuals need to be included along with the rest of the
 169 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 170 # just that.
 171
 172 AC_MSG_CHECKING([whether to place generated files in the source directory])
 173   dnl generated-files-in-srcdir is disabled by default
 174   AC_ARG_ENABLE(generated-files-in-srcdir,
 175     [AS_HELP_STRING([--enable-generated-files-in-srcdir],
 176                     [put copies of generated files in source dir
 177                      intended for creating source tarballs for users
 178                      without texinfo bison or flex])],
 179       generated_files_in_srcdir=$enableval,
 180       generated_files_in_srcdir=no)
 181
 182 AC_MSG_RESULT($generated_files_in_srcdir)
 183
 184 if test "$generated_files_in_srcdir" = "yes"; then
 185   GENINSRC=''
 186 else
 187   GENINSRC='#'
 188 fi
 189 AC_SUBST(GENINSRC)
 190
 191 # -------------------
 192 # Find default linker
 193 # -------------------
 194
 195 # With GNU ld
 196 AC_ARG_WITH(gnu-ld,
 197 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
 198 gnu_ld_flag="$with_gnu_ld",
 199 gnu_ld_flag=no)
 200
 201 # With pre-defined ld
 202 AC_ARG_WITH(ld,
 203 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
 204 DEFAULT_LINKER="$with_ld")
 205 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 206   if test ! -x "$DEFAULT_LINKER"; then
 207     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 208   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 209     gnu_ld_flag=yes
 210   fi
 211   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 212         [Define to enable the use of a default linker.])
 213 fi
 214
 215 AC_MSG_CHECKING([whether a default linker was specified])
 216 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 217   if test x"$gnu_ld_flag" = x"no"; then
 218     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 219   else
 220     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 221   fi
 222 else
 223   AC_MSG_RESULT(no)
 224 fi
 225
 226 # With demangler in GNU ld
 227 AC_ARG_WITH(demangler-in-ld,
 228 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
 229 demangler_in_ld="$with_demangler_in_ld",
 230 demangler_in_ld=yes)
 231
 232 # ----------------------
 233 # Find default assembler
 234 # ----------------------
 235
 236 # With GNU as
 237 AC_ARG_WITH(gnu-as,
 238 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
 239 gas_flag="$with_gnu_as",
 240 gas_flag=no)
 241
 242 AC_ARG_WITH(as,
 243 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
 244 DEFAULT_ASSEMBLER="$with_as")
 245 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 246   if test ! -x "$DEFAULT_ASSEMBLER"; then
 247     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 248   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 249     gas_flag=yes
 250   fi
 251   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 252         [Define to enable the use of a default assembler.])
 253 fi
 254
 255 AC_MSG_CHECKING([whether a default assembler was specified])
 256 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 257   if test x"$gas_flag" = x"no"; then
 258     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 259   else
 260     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 261   fi
 262 else
 263   AC_MSG_RESULT(no)
 264 fi
 265
 266 # ---------------
 267 # Find C compiler
 268 # ---------------
 269
 270 # If a non-executable a.out is present (e.g. created by GNU as above even if
 271 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 272 # file, even when creating an executable, so an execution test fails.
 273 # Remove possible default executable files to avoid this.
 274 #
 275 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 276 # Autoconf includes it.
 277 rm -f a.out a.exe b.out
 278
 279 # Find the native compiler
 280 AC_PROG_CC
 281 AC_PROG_CXX
 282 ACX_PROG_GNAT([-I"$srcdir"/ada])
 283
 284 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 285 # optimizations to be activated explicitly by the toplevel.
 286 case "$CC" in
 287   */prev-gcc/xgcc*) ;;
 288   *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[       ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" `
 289      CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[   ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" ` ;;
 290 esac
 291 AC_SUBST(CFLAGS)
 292 AC_SUBST(CXXFLAGS)
 293
 294 # Determine PICFLAG for target gnatlib.
 295 GCC_PICFLAG_FOR_TARGET
 296 AC_SUBST(PICFLAG_FOR_TARGET)
 297
 298 # -------------------------
 299 # Check C compiler features
 300 # -------------------------
 301
 302 AC_USE_SYSTEM_EXTENSIONS
 303 AC_PROG_CPP
 304 AC_C_INLINE
 305
 306 AC_SYS_LARGEFILE
 307
 308 # sizeof(char) is 1 by definition.
 309 AC_CHECK_SIZEOF(void *)
 310 AC_CHECK_SIZEOF(short)
 311 AC_CHECK_SIZEOF(int)
 312 AC_CHECK_SIZEOF(long)
 313 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 314 GCC_STDINT_TYPES
 315 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
 316   AC_MSG_ERROR([uint64_t or int64_t not found])
 317 fi
 318
 319 # check what underlying integer type int64_t uses
 320 AC_LANG_PUSH(C++)
 321 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
 322 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 323 #ifdef HAVE_STDINT_H
 324 #include <stdint.h>
 325 #endif
 326 template <typename T> struct X { };
 327 template <>
 328 struct X<long> { typedef long t; };
 329 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
 330 if test "$ac_cv_int64_t_type" = "long"; then
 331   AC_DEFINE(INT64_T_IS_LONG, 1,
 332   [Define if int64_t uses long as underlying type.])
 333 else
 334 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 335 #ifdef HAVE_STDINT_H
 336 #include <stdint.h>
 337 #endif
 338 template <typename T> struct X { };
 339 template <>
 340 struct X<long long> { typedef long long t; };
 341 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
 342 fi
 343 AC_LANG_POP(C++)
 344
 345
 346
 347
 348 # ---------------------
 349 # Warnings and checking
 350 # ---------------------
 351
 352 # Check $CC warning features (if it's GCC).
 353 # We want to use -pedantic, but we don't want warnings about
 354 # * 'long long'
 355 # * variadic macros
 356 # * overlong strings
 357 # * C++11 narrowing conversions in { }
 358 # So, we only use -pedantic if we can disable those warnings.
 359
 360 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
 361 AC_ARG_ENABLE(build-format-warnings,
 362   AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
 363   [],[enable_build_format_warnings=yes])
 364 AS_IF([test $enable_build_format_warnings = no],
 365       [wf_opt=-Wno-format],[wf_opt=])
 366 ACX_PROG_CC_WARNING_OPTS(
 367         m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual $wf_opt])), [loose_warn])
 368 ACX_PROG_CC_WARNING_OPTS(
 369         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 370         [c_loose_warn])
 371 ACX_PROG_CC_WARNING_OPTS(
 372         m4_quote(m4_do([-Wmissing-format-attribute])), [strict_warn])
 373 ACX_PROG_CC_WARNING_OPTS(
 374         m4_quote(m4_do([-Woverloaded-virtual])), [strict_warn])
 375 ACX_PROG_CC_WARNING_OPTS(
 376         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 377 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(
 378         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 379                        [-Wno-overlength-strings])), [strict_warn])
 380 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 381
 382 # The above macros do nothing if the compiler is not GCC.  However, the
 383 # Makefile has more goo to add other flags, so these variables are used
 384 # to enable warnings only for GCC.
 385 warn_cflags=
 386 warn_cxxflags=
 387 if test "x$GCC" = "xyes"; then
 388   warn_cflags='$(GCC_WARN_CFLAGS)'
 389   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 390 fi
 391 AC_SUBST(warn_cflags)
 392 AC_SUBST(warn_cxxflags)
 393
 394 # Disable exceptions and RTTI if building with g++
 395 ACX_PROG_CC_WARNING_OPTS(
 396         m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
 397                        [noexception_flags])
 398
 399 # Enable expensive internal checks
 400 is_release=
 401 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 402   is_release=yes
 403 fi
 404
 405 AC_ARG_ENABLE(checking,
 406 [AS_HELP_STRING([[--enable-checking[=LIST]]],
 407                 [enable expensive run-time checks.  With LIST,
 408                  enable only specific categories of checks.
 409                  Categories are: yes,no,all,none,release.
 410                  Flags are: assert,df,fold,gc,gcac,gimple,misc,
 411                  rtlflag,rtl,runtime,tree,valgrind,types])],
 412 [ac_checking_flags="${enableval}"],[
 413 # Determine the default checks.
 414 if test x$is_release = x ; then
 415   ac_checking_flags=yes
 416 else
 417   ac_checking_flags=release
 418 fi])
 419 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 420 for check in release $ac_checking_flags
 421 do
 422         case $check in
 423         # these set all the flags to specific states
 424         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 425                         ac_fold_checking= ; ac_gc_checking=1 ;
 426                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 427                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 428                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 429                         ac_types_checking=1 ;;
 430         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 431                         ac_fold_checking= ; ac_gc_checking= ;
 432                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 433                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 434                         ac_tree_checking= ; ac_valgrind_checking= ;
 435                         ac_types_checking= ;;
 436         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 437                         ac_fold_checking=1 ; ac_gc_checking=1 ;
 438                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 439                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 440                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 441                         ac_types_checking=1 ;;
 442         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 443                         ac_fold_checking= ; ac_gc_checking= ;
 444                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 445                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 446                         ac_tree_checking= ; ac_valgrind_checking= ;
 447                         ac_types_checking= ;;
 448         # these enable particular checks
 449         assert)         ac_assert_checking=1 ;;
 450         df)             ac_df_checking=1 ;;
 451         fold)           ac_fold_checking=1 ;;
 452         gc)             ac_gc_checking=1 ;;
 453         gcac)           ac_gc_always_collect=1 ;;
 454         gimple)         ac_gimple_checking=1 ;;
 455         misc)           ac_checking=1 ;;
 456         rtl)            ac_rtl_checking=1 ;;
 457         rtlflag)        ac_rtlflag_checking=1 ;;
 458         runtime)        ac_runtime_checking=1 ;;
 459         tree)           ac_tree_checking=1 ;;
 460         types)          ac_types_checking=1 ;;
 461         valgrind)       ac_valgrind_checking=1 ;;
 462         *)      AC_MSG_ERROR(unknown check category $check) ;;
 463         esac
 464 done
 465 IFS="$ac_save_IFS"
 466
 467 nocommon_flag=""
 468 if test x$ac_checking != x ; then
 469   AC_DEFINE(ENABLE_CHECKING, 1,
 470 [Define if you want more run-time sanity checks.  This one gets a grab
 471    bag of miscellaneous but relatively cheap checks.])
 472   nocommon_flag=-fno-common
 473 fi
 474 AC_SUBST(nocommon_flag)
 475 if test x$ac_df_checking != x ; then
 476   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 477 [Define if you want more run-time sanity checks for dataflow.])
 478 fi
 479 if test x$ac_assert_checking != x ; then
 480   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 481 [Define if you want assertions enabled.  This is a cheap check.])
 482 fi
 483 if test x$ac_gimple_checking != x ; then
 484   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 485 [Define if you want operations on GIMPLE (the basic data structure of
 486 the high-level optimizers) to be checked for dynamic type safety at
 487 runtime.  This is moderately expensive.])
 488 fi
 489 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 490 if test x$ac_runtime_checking != x ; then
 491   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 492 [Define if you want runtime assertions enabled.  This is a cheap check.])
 493 fi
 494 if test x$ac_tree_checking != x ; then
 495   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 496 [Define if you want all operations on trees (the basic data
 497    structure of the front ends) to be checked for dynamic type safety
 498    at runtime.  This is moderately expensive.  The tree browser debugging
 499    routines will also be enabled by this option.
 500    ])
 501   TREEBROWSER=tree-browser.o
 502   TREECHECKING=yes
 503 fi
 504 if test x$ac_types_checking != x ; then
 505   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 506 [Define if you want all gimple types to be verified after gimplifiation.
 507    This is cheap.
 508    ])
 509 fi
 510 AC_SUBST(TREEBROWSER)
 511 AC_SUBST(TREECHECKING)
 512 if test x$ac_rtl_checking != x ; then
 513   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 514 [Define if you want all operations on RTL (the basic data structure
 515    of the optimizer and back end) to be checked for dynamic type safety
 516    at runtime.  This is quite expensive.])
 517 fi
 518 if test x$ac_rtlflag_checking != x ; then
 519   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 520 [Define if you want RTL flag accesses to be checked against the RTL
 521    codes that are supported for each access macro.  This is relatively
 522    cheap.])
 523 fi
 524 if test x$ac_gc_checking != x ; then
 525   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 526 [Define if you want the garbage collector to do object poisoning and
 527    other memory allocation checks.  This is quite expensive.])
 528 fi
 529 if test x$ac_gc_always_collect != x ; then
 530   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 531 [Define if you want the garbage collector to operate in maximally
 532    paranoid mode, validating the entire heap and collecting garbage at
 533    every opportunity.  This is extremely expensive.])
 534 fi
 535 if test x$ac_fold_checking != x ; then
 536   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 537 [Define if you want fold checked that it never destructs its argument.
 538    This is quite expensive.])
 539 fi
 540 valgrind_path_defines=
 541 valgrind_command=
 542
 543 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 544 dnl # an if statement.  This was the source of very frustrating bugs
 545 dnl # in converting to autoconf 2.5x!
 546 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 547
 548 # It is certainly possible that there's valgrind but no valgrind.h.
 549 # GCC relies on making annotations so we must have both.
 550 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 551 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 552   [[#include <valgrind/memcheck.h>
 553 #ifndef VALGRIND_DISCARD
 554 #error VALGRIND_DISCARD not defined
 555 #endif]])],
 556   [gcc_cv_header_valgrind_memcheck_h=yes],
 557   [gcc_cv_header_valgrind_memcheck_h=no])
 558 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 559 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 560 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 561   [[#include <memcheck.h>
 562 #ifndef VALGRIND_DISCARD
 563 #error VALGRIND_DISCARD not defined
 564 #endif]])],
 565   [gcc_cv_header_memcheck_h=yes],
 566   [gcc_cv_header_memcheck_h=no])
 567 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 568 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 569   AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 570         [Define if valgrind's valgrind/memcheck.h header is installed.])
 571 fi
 572 if test $gcc_cv_header_memcheck_h = yes; then
 573   AC_DEFINE(HAVE_MEMCHECK_H, 1,
 574         [Define if valgrind's memcheck.h header is installed.])
 575 fi
 576
 577 if test x$ac_valgrind_checking != x ; then
 578   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 579         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 580   if test "x$valgrind_path" = "x" \
 581     || (test $have_valgrind_h = no \
 582         && test $gcc_cv_header_memcheck_h = no \
 583         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 584         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 585   fi
 586   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 587   valgrind_command="$valgrind_path -q"
 588   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 589 [Define if you want to run subprograms and generated programs
 590    through valgrind (a memory checker).  This is extremely expensive.])
 591 fi
 592 AC_SUBST(valgrind_path_defines)
 593 AC_SUBST(valgrind_command)
 594
 595 # Enable code coverage collection
 596 AC_ARG_ENABLE(coverage,
 597 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
 598                 [enable compiler's code coverage collection.
 599                  Use to measure compiler performance and locate
 600                  unused parts of the compiler. With LEVEL, specify
 601                  optimization. Values are opt, noopt,
 602                  default is noopt])],
 603 [case "${enableval}" in
 604   yes|noopt)
 605     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
 606     ;;
 607   opt)
 608     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
 609     ;;
 610   no)
 611     # a.k.a. --disable-coverage
 612     coverage_flags=""
 613     ;;
 614   *)
 615     AC_MSG_ERROR(unknown coverage setting $enableval)
 616     ;;
 617 esac],
 618 [coverage_flags=""])
 619 AC_SUBST(coverage_flags)
 620
 621 AC_ARG_ENABLE(gather-detailed-mem-stats,
 622 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
 623                 [enable detailed memory allocation stats gathering])], [],
 624 [enable_gather_detailed_mem_stats=no])
 625 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
 626 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
 627 [Define to enable detailed memory allocation stats gathering.])
 628
 629 AC_ARG_ENABLE(valgrind-annotations,
 630 [AS_HELP_STRING([--enable-valgrind-annotations],
 631                 [enable valgrind runtime interaction])], [],
 632 [enable_valgrind_annotations=no])
 633 if test x$enable_valgrind_annotations != xno \
 634     || test x$ac_valgrind_checking != x; then
 635   if (test $have_valgrind_h = no \
 636       && test $gcc_cv_header_memcheck_h = no \
 637       && test $gcc_cv_header_valgrind_memcheck_h = no); then
 638     AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
 639   fi
 640   AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
 641 [Define to get calls to the valgrind runtime enabled.])
 642 fi
 643
 644 # -------------------------------
 645 # Miscenalleous configure options
 646 # -------------------------------
 647
 648 # With stabs
 649 AC_ARG_WITH(stabs,
 650 [AS_HELP_STRING([--with-stabs],
 651                 [arrange to use stabs instead of host debug format])],
 652 stabs="$with_stabs",
 653 stabs=no)
 654
 655 # Determine whether or not multilibs are enabled.
 656 AC_ARG_ENABLE(multilib,
 657 [AS_HELP_STRING([--enable-multilib],
 658                 [enable library support for multiple ABIs])],
 659 [], [enable_multilib=yes])
 660 AC_SUBST(enable_multilib)
 661
 662 # Determine whether or not multiarch is enabled.
 663 AC_ARG_ENABLE(multiarch,
 664 [AS_HELP_STRING([--enable-multiarch],
 665                 [enable support for multiarch paths])],
 666 [case "${enableval}" in
 667 yes|no|auto) enable_multiarch=$enableval;;
 668 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
 669 esac], [enable_multiarch=auto])
 670 if test x${enable_multiarch} = xauto; then
 671   if test x${with_native_system_header_dir} != x; then
 672     ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
 673     enable_multiarch=no
 674   fi
 675   if test x$host != x$target && test "x$with_sysroot" = x; then
 676     ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
 677     enable_multiarch=no
 678   fi
 679 fi
 680 AC_MSG_CHECKING(for multiarch configuration)
 681 AC_SUBST(enable_multiarch)
 682 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
 683
 684 # needed for setting the multiarch name for soft-float/hard-float ABIs
 685 AC_SUBST(with_cpu)
 686 AC_SUBST(with_float)
 687
 688 # Enable __cxa_atexit for C++.
 689 AC_ARG_ENABLE(__cxa_atexit,
 690 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
 691 [], [])
 692
 693 # Enable C extension for decimal float if target supports it.
 694 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 695
 696 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 697 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 698 [Define to 1 to enable decimal float extension to C.])
 699
 700 # Use default_decimal_float for dependency.
 701 enable_decimal_float=$default_decimal_float
 702
 703 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 704 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 705 [Define to 1 to specify that we are using the BID decimal floating
 706 point format instead of DPD])
 707
 708 # Enable C extension for fixed-point arithmetic.
 709 AC_ARG_ENABLE(fixed-point,
 710 [AS_HELP_STRING([--enable-fixed-point],
 711                 [enable fixed-point arithmetic extension to C])],
 712 [],
 713 [
 714   case $target in
 715     arm*)
 716       enable_fixed_point=yes
 717       ;;
 718
 719     mips*-*-*)
 720       enable_fixed_point=yes
 721       ;;
 722     *)
 723       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 724       enable_fixed_point=no
 725       ;;
 726   esac
 727 ])
 728 AC_SUBST(enable_fixed_point)
 729
 730 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 731 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 732 [Define to 1 to enable fixed-point arithmetic extension to C.])
 733
 734 # Enable threads
 735 # Pass with no value to take the default
 736 # Pass with a value to specify a thread package
 737 AC_ARG_ENABLE(threads,
 738 [AS_HELP_STRING([[--enable-threads[=LIB]]],
 739                 [enable thread usage for target GCC,
 740                  using LIB thread package])],,
 741 [enable_threads=''])
 742
 743 AC_ARG_ENABLE(tls,
 744 [AS_HELP_STRING([--enable-tls],
 745                 [enable or disable generation of tls code
 746                  overriding the assembler check for tls support])],
 747 [
 748   case $enable_tls in
 749     yes | no) ;;
 750     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 751 Valid choices are 'yes' and 'no'.]) ;;
 752   esac
 753 ], [enable_tls=''])
 754
 755 AC_ARG_ENABLE(objc-gc,
 756 [AS_HELP_STRING([--enable-objc-gc],
 757                 [enable the use of Boehm's garbage collector with
 758                  the GNU Objective-C runtime])],
 759 if test x$enable_objc_gc = xno; then
 760         objc_boehm_gc=''
 761 else
 762         objc_boehm_gc=1
 763 fi,
 764 objc_boehm_gc='')
 765
 766 AC_ARG_WITH(dwarf2,
 767 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
 768 dwarf2="$with_dwarf2",
 769 dwarf2=no)
 770
 771 AC_ARG_ENABLE(shared,
 772 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
 773 [
 774   case $enable_shared in
 775   yes | no) ;;
 776   *)
 777     enable_shared=no
 778     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 779     for pkg in $enableval; do
 780       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 781         enable_shared=yes
 782       fi
 783     done
 784     IFS="$ac_save_ifs"
 785     ;;
 786   esac
 787 ], [enable_shared=yes])
 788 AC_SUBST(enable_shared)
 789
 790 AC_ARG_WITH([native-system-header-dir],
 791   [  --with-native-system-header-dir=dir
 792                           use dir as the directory to look for standard
 793                           system header files in.  Defaults to /usr/include.],
 794 [
 795  case ${with_native_system_header_dir} in
 796  yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
 797  /* | [[A-Za-z]]:[[\\/]]*) ;;
 798  *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
 799  esac
 800  configured_native_system_header_dir="${withval}"
 801 ], [configured_native_system_header_dir=])
 802
 803 AC_ARG_WITH(build-sysroot,
 804   [AS_HELP_STRING([--with-build-sysroot=sysroot],
 805                   [use sysroot as the system root during the build])],
 806   [if test x"$withval" != x ; then
 807      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
 808    fi],
 809   [SYSROOT_CFLAGS_FOR_TARGET=])
 810 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
 811
 812 if test "x$prefix" = xNONE; then
 813  test_prefix=/usr/local
 814 else
 815  test_prefix=$prefix
 816 fi
 817 if test "x$exec_prefix" = xNONE; then
 818  test_exec_prefix=$test_prefix
 819 else
 820  test_exec_prefix=$exec_prefix
 821 fi
 822
 823 AC_ARG_WITH(sysroot,
 824 [AS_HELP_STRING([[--with-sysroot[=DIR]]],
 825                 [search for usr/lib, usr/include, et al, within DIR])],
 826 [
 827  case ${with_sysroot} in
 828  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 829  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 830  esac
 831
 832  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 833  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 834
 835  case ${TARGET_SYSTEM_ROOT} in
 836  "${test_prefix}"|"${test_prefix}/"*|\
 837  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 838  '${prefix}'|'${prefix}/'*|\
 839  '${exec_prefix}'|'${exec_prefix}/'*)
 840    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 841    TARGET_SYSTEM_ROOT_DEFINE="$t"
 842    ;;
 843  esac
 844 ], [
 845  TARGET_SYSTEM_ROOT=
 846  TARGET_SYSTEM_ROOT_DEFINE=
 847  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 848 ])
 849 AC_SUBST(TARGET_SYSTEM_ROOT)
 850 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 851 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 852
 853 AC_ARG_WITH(specs,
 854   [AS_HELP_STRING([--with-specs=SPECS],
 855                   [add SPECS to driver command-line processing])],
 856   [CONFIGURE_SPECS=$withval],
 857   [CONFIGURE_SPECS=]
 858 )
 859 AC_SUBST(CONFIGURE_SPECS)
 860
 861 ACX_PKGVERSION([GCC])
 862 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
 863
 864 # Sanity check enable_languages in case someone does not run the toplevel
 865 # configure # script.
 866 AC_ARG_ENABLE(languages,
 867 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
 868 [case ,${enable_languages}, in
 869        ,,|,yes,)
 870                 # go safe -- we cannot be much sure without the toplevel
 871                 # configure's
 872                 # analysis of which target libs are present and usable
 873                 enable_languages=c
 874                 ;;
 875          *,all,*)
 876                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 877                 ;;
 878         *,c,*)
 879                 ;;
 880         *)
 881                 enable_languages=c,${enable_languages}
 882                 ;;
 883 esac],
 884 [enable_languages=c])
 885
 886 AC_ARG_WITH(multilib-list,
 887 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, SH and x86-64 only)])],
 888 :,
 889 with_multilib_list=default)
 890
 891 # -------------------------
 892 # Checks for other programs
 893 # -------------------------
 894
 895 AC_PROG_MAKE_SET
 896
 897 # Find some useful tools
 898 AC_PROG_AWK
 899 # We need awk to create options.c and options.h.
 900 # Bail out if it's missing.
 901 case ${AWK} in
 902   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
 903 esac
 904
 905 gcc_AC_PROG_LN_S
 906 ACX_PROG_LN($LN_S)
 907 AC_PROG_RANLIB
 908 ranlib_flags=""
 909 AC_SUBST(ranlib_flags)
 910
 911 gcc_AC_PROG_INSTALL
 912
 913 # See if cmp has --ignore-initial.
 914 gcc_AC_PROG_CMP_IGNORE_INITIAL
 915
 916 # See if we have the mktemp command.
 917 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
 918
 919 # See if makeinfo has been installed and is modern enough
 920 # that we can use it.
 921 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
 922   [GNU texinfo.* \([0-9][0-9.]*\)],
 923   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
 924 if test $gcc_cv_prog_makeinfo_modern = no; then
 925   AC_MSG_WARN([
 926 *** Makeinfo is missing or too old.
 927 *** Info documentation will not be built.])
 928   BUILD_INFO=
 929 else
 930   BUILD_INFO=info
 931 fi
 932 AC_SUBST(BUILD_INFO)
 933
 934 # Is pod2man recent enough to regenerate manpages?
 935 AC_MSG_CHECKING([for recent Pod::Man])
 936 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
 937   AC_MSG_RESULT(yes)
 938   GENERATED_MANPAGES=generated-manpages
 939 else
 940   AC_MSG_RESULT(no)
 941   GENERATED_MANPAGES=
 942 fi
 943 AC_SUBST(GENERATED_MANPAGES)
 944
 945 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
 946
 947 # How about lex?
 948 dnl Don't use AC_PROG_LEX; we insist on flex.
 949 dnl LEXLIB is not useful in gcc.
 950 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
 951
 952 # Bison?
 953 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
 954
 955 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
 956 # check for build == host before using them.
 957
 958 # NM
 959 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
 960   && test -d ../binutils ; then
 961   NM='${objdir}/../binutils/nm-new'
 962 else
 963   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
 964 fi
 965
 966 # AR
 967 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
 968   && test -d ../binutils ; then
 969   AR='${objdir}/../binutils/ar'
 970 else
 971   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
 972 fi
 973
 974
 975 # --------------------
 976 # Checks for C headers
 977 # --------------------
 978
 979 # Need to reject headers which give warnings, so that the -Werror bootstrap
 980 # works later. *sigh*  This needs to come before all header checks.
 981 AC_PROG_CPP_WERROR
 982
 983 AC_HEADER_STDC
 984 AC_HEADER_TIME
 985 ACX_HEADER_STRING
 986 AC_HEADER_SYS_WAIT
 987 AC_HEADER_TIOCGWINSZ
 988 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
 989                  fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
 990                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
 991                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
 992
 993 # Check for thread headers.
 994 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
 995 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
 996
 997 # These tests can't be done till we know if we have limits.h.
 998 gcc_AC_C_CHAR_BIT
 999 AC_C_BIGENDIAN
1000
1001 # ----------------------
1002 # Checks for C++ headers
1003 # ----------------------
1004
1005 dnl Autoconf will give an error in the configure script if there is no
1006 dnl C++ preprocessor.  Hack to prevent that.
1007 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1008 AC_PROG_CXXCPP
1009 m4_popdef([AC_MSG_ERROR])[]dnl
1010
1011 AC_LANG_PUSH(C++)
1012
1013 AC_CHECK_HEADERS(unordered_map)
1014 AC_CHECK_HEADERS(tr1/unordered_map)
1015 AC_CHECK_HEADERS(ext/hash_map)
1016
1017 AC_LANG_POP(C++)
1018
1019 # --------
1020 # Dependency checking.
1021 # --------
1022
1023 AC_LANG_PUSH(C++)
1024 ZW_CREATE_DEPDIR
1025 AC_CONFIG_COMMANDS([gccdepdir],[
1026   ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1027   for lang in $subdirs c-family common
1028   do
1029       ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1030   done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1031
1032 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1033 AC_LANG_POP(C++)
1034
1035 # --------
1036 # UNSORTED
1037 # --------
1038
1039
1040 # These libraries may be used by collect2.
1041 # We may need a special search path to get them linked.
1042 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1043 [save_LIBS="$LIBS"
1044 for libs in '' -lld -lmld \
1045                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1046                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1047 do
1048         LIBS="$libs"
1049         AC_TRY_LINK_FUNC(ldopen,
1050                 [gcc_cv_collect2_libs="$libs"; break])
1051 done
1052 LIBS="$save_LIBS"
1053 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1054 case $gcc_cv_collect2_libs in
1055         "none required")        ;;
1056         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1057 esac
1058 AC_SUBST(COLLECT2_LIBS)
1059
1060 # When building Ada code on Alpha, we need exc_resume which is usually in
1061 # -lexc.  So test for it.
1062 save_LIBS="$LIBS"
1063 LIBS=
1064 AC_SEARCH_LIBS(exc_resume, exc)
1065 GNAT_LIBEXC="$LIBS"
1066 LIBS="$save_LIBS"
1067 AC_SUBST(GNAT_LIBEXC)
1068
1069 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1070 save_LIBS="$LIBS"
1071 LIBS=
1072 AC_SEARCH_LIBS(kstat_open, kstat)
1073 EXTRA_GCC_LIBS="$LIBS"
1074 LIBS="$save_LIBS"
1075 AC_SUBST(EXTRA_GCC_LIBS)
1076
1077 # Some systems put ldexp and frexp in libm instead of libc; assume
1078 # they're both in the same place.  jcf-dump needs them.
1079 save_LIBS="$LIBS"
1080 LIBS=
1081 AC_SEARCH_LIBS(ldexp, m)
1082 LDEXP_LIB="$LIBS"
1083 LIBS="$save_LIBS"
1084 AC_SUBST(LDEXP_LIB)
1085
1086 # Use <inttypes.h> only if it exists,
1087 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1088 # PRId64
1089 AC_MSG_CHECKING(for inttypes.h)
1090 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1091 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1092 [[#define __STDC_FORMAT_MACROS
1093 #include <sys/types.h>
1094 #include <inttypes.h>]],
1095   [[intmax_t i = -1;
1096 #ifndef PRId64
1097 choke me
1098 #endif]])],
1099   [gcc_cv_header_inttypes_h=yes],
1100   [gcc_cv_header_inttypes_h=no])])
1101 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1102 if test $gcc_cv_header_inttypes_h = yes; then
1103   AC_DEFINE(HAVE_INTTYPES_H, 1,
1104         [Define if you have a working <inttypes.h> header file.])
1105 fi
1106
1107 dnl Disabled until we have a complete test for buggy enum bitfields.
1108 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1109
1110 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1111   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1112   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1113   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1114   putchar_unlocked putc_unlocked)
1115 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
1116         sysconf strsignal getrusage nl_langinfo \
1117         gettimeofday mbstowcs wcswidth mmap setlocale \
1118         gcc_UNLOCKED_FUNCS madvise)
1119
1120 if test x$ac_cv_func_mbstowcs = xyes; then
1121   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1122 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1123 int main()
1124 {
1125   mbstowcs(0, "", 0);
1126   return 0;
1127 }]])],
1128     [gcc_cv_func_mbstowcs_works=yes],
1129     [gcc_cv_func_mbstowcs_works=no],
1130     [gcc_cv_func_mbstowcs_works=yes])])
1131   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1132     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1133   [Define this macro if mbstowcs does not crash when its
1134    first argument is NULL.])
1135   fi
1136 fi
1137
1138 AC_CHECK_TYPE(ssize_t, int)
1139 AC_CHECK_TYPE(caddr_t, char *)
1140
1141 GCC_AC_FUNC_MMAP_BLACKLIST
1142
1143 case "${host}" in
1144 *-*-*vms*)
1145   # Under VMS, vfork works very differently than on Unix. The standard test
1146   # won't work, and it isn't easily adaptable. It makes more sense to
1147   # just force it.
1148   ac_cv_func_vfork_works=yes
1149   ;;
1150 esac
1151 AC_FUNC_FORK
1152
1153 # g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which exposes a different
1154 # iconv() prototype.
1155 AC_LANG_PUSH([C++])
1156 AM_ICONV
1157 AC_LANG_POP([C++])
1158
1159 # Until we have in-tree GNU iconv:
1160 LIBICONV_DEP=
1161 AC_SUBST(LIBICONV_DEP)
1162
1163 AM_LC_MESSAGES
1164
1165 AM_LANGINFO_CODESET
1166
1167 # We will need to find libiberty.h and ansidecl.h
1168 saved_CFLAGS="$CFLAGS"
1169 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1170 saved_CXXFLAGS="$CXXFLAGS"
1171 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1172 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1173         stpcpy strnlen strsignal strstr strverscmp \
1174         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1175         free basename getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1176 #include "ansidecl.h"
1177 #include "system.h"])
1178
1179 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1180 #include "ansidecl.h"
1181 #include "system.h"
1182 #ifdef HAVE_SYS_RESOURCE_H
1183 #include <sys/resource.h>
1184 #endif
1185 ])
1186
1187 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1188 #include "ansidecl.h"
1189 #include "system.h"
1190 #ifdef HAVE_SYS_RESOURCE_H
1191 #include <sys/resource.h>
1192 #endif
1193 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1194 [Define to `long' if <sys/resource.h> doesn't define.])])
1195
1196 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1197 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1198 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1199 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1200 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1201 #include "ansidecl.h"
1202 #include "system.h"
1203 #ifdef HAVE_LDFCN_H
1204 #undef FREAD
1205 #undef FWRITE
1206 #include <ldfcn.h>
1207 #endif
1208 ])
1209
1210 gcc_AC_CHECK_DECLS(times, , ,[
1211 #include "ansidecl.h"
1212 #include "system.h"
1213 #ifdef HAVE_SYS_TIMES_H
1214 #include <sys/times.h>
1215 #endif
1216 ])
1217
1218 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1219 #include "ansidecl.h"
1220 #include "system.h"
1221 #include <signal.h>
1222 ])
1223
1224 # g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which hides the madvise()
1225 # prototype.
1226 AC_LANG_PUSH([C++])
1227 gcc_AC_CHECK_DECLS(madvise, , ,[
1228   #include "ansidecl.h"
1229   #include "system.h"
1230 ])
1231 AC_LANG_POP([C++])
1232
1233 # More time-related stuff.
1234 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1235 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1236 #include "ansidecl.h"
1237 #include "system.h"
1238 #ifdef HAVE_SYS_TIMES_H
1239 #include <sys/times.h>
1240 #endif
1241 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1242 if test $ac_cv_struct_tms = yes; then
1243   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1244   [Define if <sys/times.h> defines struct tms.])
1245 fi
1246
1247 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1248 # revisit after autoconf 2.50.
1249 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1250 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1251 #include "ansidecl.h"
1252 #include "system.h"
1253 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1254 if test $gcc_cv_type_clock_t = yes; then
1255   AC_DEFINE(HAVE_CLOCK_T, 1,
1256   [Define if <time.h> defines clock_t.])
1257 fi
1258
1259 # Check if F_SETLKW is supported by fcntl.
1260 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1261 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1262 #include <fcntl.h>]], [[
1263 struct flock fl;
1264 fl.l_whence = 0;
1265 fl.l_start = 0;
1266 fl.l_len = 0;
1267 fl.l_pid = 0;
1268 return fcntl (1, F_SETLKW, &fl);]])],
1269 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1270 if test $ac_cv_f_setlkw = yes; then
1271   AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1272   [Define if F_SETLKW supported by fcntl.])
1273 fi
1274
1275 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1276 CFLAGS="$saved_CFLAGS"
1277 CXXFLAGS="$saved_CXXFLAGS"
1278
1279 # mkdir takes a single argument on some systems.
1280 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1281
1282 # File extensions
1283 manext='.1'
1284 objext='.o'
1285 AC_SUBST(manext)
1286 AC_SUBST(objext)
1287
1288 # With Setjmp/Longjmp based exception handling.
1289 AC_ARG_ENABLE(sjlj-exceptions,
1290 [AS_HELP_STRING([--enable-sjlj-exceptions],
1291                 [arrange to use setjmp/longjmp exception handling])],
1292 [case $target in
1293   *-*-hpux10*)
1294     if test $enableval != yes; then
1295       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1296       enableval=yes
1297     fi
1298     ;;
1299 esac
1300 force_sjlj_exceptions=yes],
1301 [case $target in
1302   *-*-hpux10*)
1303     force_sjlj_exceptions=yes
1304     enableval=yes
1305     ;;
1306   lm32*-*-*)
1307      force_sjlj_exceptions=yes
1308      enableval=yes
1309      ;;
1310   *)
1311     force_sjlj_exceptions=no
1312     ;;
1313 esac])
1314 if test $force_sjlj_exceptions = yes; then
1315   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1316   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1317     [Define 0/1 to force the choice for exception handling model.])
1318 fi
1319
1320 # --------------------------------------------------------
1321 # Build, host, and target specific configuration fragments
1322 # --------------------------------------------------------
1323
1324 # Collect build-machine-specific information.
1325 . ${srcdir}/config.build
1326
1327 # Collect host-machine-specific information.
1328 . ${srcdir}/config.host
1329
1330 target_gtfiles=
1331
1332 # Collect target-machine-specific information.
1333 . ${srcdir}/config.gcc
1334
1335 extra_objs="${host_extra_objs} ${extra_objs}"
1336 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1337
1338 # Default the target-machine variables that were not explicitly set.
1339 if test x"$tm_file" = x
1340 then tm_file=$cpu_type/$cpu_type.h; fi
1341
1342 if test x"$extra_headers" = x
1343 then extra_headers=; fi
1344
1345 if test x$md_file = x
1346 then md_file=$cpu_type/$cpu_type.md; fi
1347
1348 if test x$out_file = x
1349 then out_file=$cpu_type/$cpu_type.c; fi
1350
1351 if test x"$tmake_file" = x
1352 then tmake_file=$cpu_type/t-$cpu_type
1353 fi
1354
1355 # Support --enable-initfini-array.
1356 if test x$enable_initfini_array != xno; then
1357   tm_file="${tm_file} initfini-array.h"
1358 fi
1359
1360 if test x"$dwarf2" = xyes
1361 then tm_file="$tm_file tm-dwarf2.h"
1362 fi
1363
1364 # Say what files are being used for the output code and MD file.
1365 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1366 echo "Using \`$srcdir/config/$md_file' as machine description file."
1367
1368 # If any of the xm_file variables contain nonexistent files, warn
1369 # about them and drop them.
1370
1371 bx=
1372 for x in $build_xm_file; do
1373   if    test -f $srcdir/config/$x
1374   then      bx="$bx $x"
1375   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1376   fi
1377 done
1378 build_xm_file="$bx"
1379
1380 hx=
1381 for x in $host_xm_file; do
1382   if    test -f $srcdir/config/$x
1383   then      hx="$hx $x"
1384   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1385   fi
1386 done
1387 host_xm_file="$hx"
1388
1389 tx=
1390 for x in $xm_file; do
1391   if    test -f $srcdir/config/$x
1392   then      tx="$tx $x"
1393   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1394   fi
1395 done
1396 xm_file="$tx"
1397
1398 count=a
1399 for f in $tm_file; do
1400         count=${count}x
1401 done
1402 if test $count = ax; then
1403         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1404 else
1405         echo "Using the following target machine macro files:"
1406         for f in $tm_file; do
1407                 echo "  $srcdir/config/$f"
1408         done
1409 fi
1410
1411 if test x$use_long_long_for_widest_fast_int = xyes; then
1412         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1413 [Define to 1 if the 'long long' type is wider than 'long' but still
1414 efficiently supported by the host hardware.])
1415 fi
1416
1417 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1418 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1419
1420 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1421 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1422
1423 count=a
1424 for f in $host_xm_file; do
1425         count=${count}x
1426 done
1427 if test $count = a; then
1428         :
1429 elif test $count = ax; then
1430         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1431 else
1432         echo "Using the following host machine macro files:"
1433         for f in $host_xm_file; do
1434                 echo "  $srcdir/config/$f"
1435         done
1436 fi
1437 echo "Using ${out_host_hook_obj} for host machine hooks."
1438
1439 if test "$host_xm_file" != "$build_xm_file"; then
1440         count=a
1441         for f in $build_xm_file; do
1442                 count=${count}x
1443         done
1444         if test $count = a; then
1445                 :
1446         elif test $count = ax; then
1447                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1448         else
1449                 echo "Using the following build machine macro files:"
1450                 for f in $build_xm_file; do
1451                         echo "  $srcdir/config/$f"
1452                 done
1453         fi
1454 fi
1455
1456 if test -n "$configured_native_system_header_dir"; then
1457   native_system_header_dir=$configured_native_system_header_dir
1458 fi
1459 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1460 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1461
1462 case ${host} in
1463   powerpc*-*-darwin*)
1464     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1465       gcc_cv_mcontext_underscores,
1466       AC_COMPILE_IFELSE([
1467 #include <sys/cdefs.h>
1468 #include <sys/signal.h>
1469 #include <ucontext.h>
1470 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1471 ],
1472         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1473       if test $gcc_cv_mcontext_underscores = yes; then
1474         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1475           [mcontext_t fields start with __])
1476       fi
1477     ;;
1478 esac
1479
1480 # ---------
1481 # Threading
1482 # ---------
1483
1484 # Check if a valid thread package
1485 case ${enable_threads} in
1486   "" | no)
1487     # No threads
1488     target_thread_file='single'
1489     ;;
1490   yes)
1491     # default
1492     target_thread_file='single'
1493     ;;
1494   aix | dce | lynx | mipssde | posix | rtems | \
1495   single | tpf | vxworks | win32)
1496     target_thread_file=${enable_threads}
1497     ;;
1498   *)
1499     echo "${enable_threads} is an unknown thread package" 1>&2
1500     exit 1
1501     ;;
1502 esac
1503
1504 if test x${thread_file} = x; then
1505   # No thread file set by target-specific clauses in config.gcc,
1506   # so use file chosen by default logic above
1507   thread_file=${target_thread_file}
1508 fi
1509
1510 # --------
1511 # UNSORTED
1512 # --------
1513
1514 use_cxa_atexit=no
1515 if test x$enable___cxa_atexit = xyes || \
1516    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1517   if test x$host = x$target; then
1518     case $host in
1519       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1520       # keyed to flag_use_cxa_atexit
1521       *-*-mingw32*)
1522         use_cxa_atexit=yes
1523         ;;
1524       powerpc-ibm-aix*)
1525         use_cxa_atexit=yes
1526         ;;
1527       *)
1528         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1529           [echo "__cxa_atexit can't be enabled on this target"])
1530         ;;
1531     esac
1532   else
1533     # We can't check for __cxa_atexit when building a cross, so assume
1534     # it is available
1535     use_cxa_atexit=yes
1536   fi
1537   if test x$use_cxa_atexit = xyes; then
1538     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1539       [Define if you want to use __cxa_atexit, rather than atexit, to
1540       register C++ destructors for local statics and global objects.
1541       This is essential for fully standards-compliant handling of
1542       destructors, but requires __cxa_atexit in libc.])
1543   fi
1544 fi
1545
1546 # Look for a file containing extra machine modes.
1547 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1548   extra_modes_file='$(srcdir)'/config/${extra_modes}
1549   AC_SUBST(extra_modes_file)
1550   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1551   [Define to the name of a file containing a list of extra machine modes
1552    for this architecture.])
1553 fi
1554
1555 # Convert extra_options into a form suitable for Makefile use.
1556 extra_opt_files=
1557 all_opt_files=
1558 for f in $extra_options; do
1559   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1560   all_opt_files="$all_opt_files $srcdir/config/$f"
1561 done
1562 AC_SUBST(extra_opt_files)
1563
1564 # auto-host.h is the file containing items generated by autoconf and is
1565 # the first file included by config.h.
1566 # If host=build, it is correct to have bconfig include auto-host.h
1567 # as well.  If host!=build, we are in error and need to do more
1568 # work to find out the build config parameters.
1569 if test x$host = x$build
1570 then
1571         build_auto=auto-host.h
1572 else
1573         # We create a subdir, then run autoconf in the subdir.
1574         # To prevent recursion we set host and build for the new
1575         # invocation of configure to the build for this invocation
1576         # of configure.
1577         tempdir=build.$$
1578         rm -rf $tempdir
1579         mkdir $tempdir
1580         cd $tempdir
1581         case ${srcdir} in
1582         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1583         *) realsrcdir=../${srcdir};;
1584         esac
1585         # Clearing GMPINC is necessary to prevent host headers being
1586         # used by the build compiler.  Defining GENERATOR_FILE stops
1587         # system.h from including gmp.h.
1588         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1589         CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
1590         LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1591         GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
1592         ${realsrcdir}/configure \
1593                 --enable-languages=${enable_languages-all} \
1594                 --target=$target_alias --host=$build_alias --build=$build_alias
1595
1596         # We just finished tests for the build machine, so rename
1597         # the file auto-build.h in the gcc directory.
1598         mv auto-host.h ../auto-build.h
1599         cd ..
1600         rm -rf $tempdir
1601         build_auto=auto-build.h
1602 fi
1603 AC_SUBST(build_subdir)
1604
1605 tm_file="${tm_file} defaults.h"
1606 tm_p_file="${tm_p_file} tm-preds.h"
1607 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1608 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1609 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1610 # put this back in temporarily.
1611 xm_file="auto-host.h ansidecl.h ${xm_file}"
1612
1613 # --------
1614 # UNSORTED
1615 # --------
1616
1617 changequote(,)dnl
1618 # Compile in configure arguments.
1619 if test -f configargs.h ; then
1620         # Being re-configured.
1621         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1622         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1623 else
1624         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1625 fi
1626
1627 # Double all backslashes and backslash all quotes to turn
1628 # gcc_config_arguments into a C string.
1629 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1630 $gcc_config_arguments
1631 EOF
1632 gcc_config_arguments_str=`cat conftest.out`
1633 rm -f conftest.out
1634
1635 cat > configargs.h <<EOF
1636 /* Generated automatically. */
1637 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1638 static const char thread_model[] = "$thread_file";
1639
1640 static const struct {
1641   const char *name, *value;
1642 } configure_default_options[] = $configure_default_options;
1643 EOF
1644 changequote([,])dnl
1645
1646 changequote(,)dnl
1647 gcc_BASEVER=`cat $srcdir/BASE-VER`
1648 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1649 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1650 if test -f $srcdir/REVISION ; then
1651         gcc_REVISION=`cat $srcdir/REVISION`
1652 else
1653         gcc_REVISION=""
1654 fi
1655 cat > plugin-version.h <<EOF
1656 #include "configargs.h"
1657
1658 #define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
1659 #define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
1660 #define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
1661 #define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
1662
1663 static char basever[] = "$gcc_BASEVER";
1664 static char datestamp[] = "$gcc_DATESTAMP";
1665 static char devphase[] = "$gcc_DEVPHASE";
1666 static char revision[] = "$gcc_REVISION";
1667
1668 /* FIXME plugins: We should make the version information more precise.
1669    One way to do is to add a checksum. */
1670
1671 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1672                                                 devphase, revision,
1673                                                 configuration_arguments};
1674 EOF
1675 changequote([,])dnl
1676
1677 # Internationalization
1678 ZW_GNU_GETTEXT_SISTER_DIR
1679
1680 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1681 # -liconv on the link line twice.
1682 case "$LIBINTL" in *$LIBICONV*)
1683         LIBICONV= ;;
1684 esac
1685
1686 AC_ARG_ENABLE(secureplt,
1687 [AS_HELP_STRING([--enable-secureplt],
1688                 [enable -msecure-plt by default for PowerPC])],
1689 [], [])
1690
1691 AC_ARG_ENABLE(leading-mingw64-underscores,
1692   AS_HELP_STRING([--enable-leading-mingw64-underscores],
1693                  [enable leading underscores on 64 bit mingw targets]),
1694   [],[])
1695 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1696   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1697     [Define if we should use leading underscore on 64 bit mingw targets])])
1698
1699 AC_ARG_ENABLE(cld,
1700 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
1701 [enable_cld=no])
1702
1703 AC_ARG_ENABLE(frame-pointer,
1704 [AS_HELP_STRING([--enable-frame-pointer],
1705                 [enable -fno-omit-frame-pointer by default for 32bit x86])], [],
1706 [
1707 case $target_os in
1708 linux* | darwin[[8912]]*)
1709   # Enable -fomit-frame-pointer by default for Linux and Darwin with
1710   # DWARF2.
1711   enable_frame_pointer=no
1712   ;;
1713 *)
1714   enable_frame_pointer=yes
1715   ;;
1716 esac
1717 ])
1718
1719 # Windows32 Registry support for specifying GCC installation paths.
1720 AC_ARG_ENABLE(win32-registry,
1721 [AS_HELP_STRING([--disable-win32-registry],
1722                 [disable lookup of installation paths in the
1723                  Registry on Windows hosts])
1724 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
1725 AS_HELP_STRING([--enable-win32-registry=KEY],
1726                [use KEY instead of GCC version as the last portion
1727                 of the registry key])],,)
1728
1729 case $host_os in
1730   win32 | pe | cygwin* | mingw32* | uwin*)
1731     if test "x$enable_win32_registry" != xno; then
1732       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1733     fi
1734
1735     if test "x$enable_win32_registry" != xno; then
1736       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1737   [Define to 1 if installation paths should be looked up in the Windows
1738    Registry. Ignored on non-Windows hosts.])
1739
1740       if test "x$enable_win32_registry" != xyes \
1741          && test "x$enable_win32_registry" != x; then
1742         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1743   [Define to be the last component of the Windows registry key under which
1744    to look for installation paths.  The full key used will be
1745    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1746    The default is the GCC version number.])
1747       fi
1748     fi
1749   ;;
1750 esac
1751
1752 # Get an absolute path to the GCC top-level source directory
1753 holddir=`${PWDCMD-pwd}`
1754 cd $srcdir
1755 topdir=`${PWDCMD-pwd}`
1756 cd $holddir
1757
1758 # Conditionalize the makefile for this host machine.
1759 xmake_file=
1760 for f in ${host_xmake_file}
1761 do
1762         if test -f ${srcdir}/config/$f
1763         then
1764                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1765         fi
1766 done
1767
1768 # Conditionalize the makefile for this target machine.
1769 tmake_file_=
1770 for f in ${tmake_file}
1771 do
1772         if test -f ${srcdir}/config/$f
1773         then
1774                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1775         fi
1776 done
1777 tmake_file="${tmake_file_}"
1778
1779 out_object_file=`basename $out_file .c`.o
1780 common_out_object_file=`basename $common_out_file .c`.o
1781
1782 tm_file_list="options.h"
1783 tm_include_list="options.h insn-constants.h"
1784 for f in $tm_file; do
1785   case $f in
1786     ./* )
1787        f=`echo $f | sed 's/^..//'`
1788        tm_file_list="${tm_file_list} $f"
1789        tm_include_list="${tm_include_list} $f"
1790        ;;
1791     defaults.h )
1792        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1793        tm_include_list="${tm_include_list} $f"
1794        ;;
1795     * )
1796        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1797        tm_include_list="${tm_include_list} config/$f"
1798        ;;
1799   esac
1800 done
1801
1802 tm_p_file_list=
1803 tm_p_include_list=
1804 for f in $tm_p_file; do
1805   case $f in
1806     tm-preds.h )
1807        tm_p_file_list="${tm_p_file_list} $f"
1808        tm_p_include_list="${tm_p_include_list} $f"
1809        ;;
1810     * )
1811        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1812        tm_p_include_list="${tm_p_include_list} config/$f"
1813   esac
1814 done
1815
1816 xm_file_list=
1817 xm_include_list=
1818 for f in $xm_file; do
1819   case $f in
1820     ansidecl.h )
1821        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1822        xm_include_list="${xm_include_list} $f"
1823        ;;
1824     auto-host.h )
1825        xm_file_list="${xm_file_list} $f"
1826        xm_include_list="${xm_include_list} $f"
1827        ;;
1828     * )
1829        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1830        xm_include_list="${xm_include_list} config/$f"
1831        ;;
1832   esac
1833 done
1834
1835 host_xm_file_list=
1836 host_xm_include_list=
1837 for f in $host_xm_file; do
1838   case $f in
1839     ansidecl.h )
1840        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1841        host_xm_include_list="${host_xm_include_list} $f"
1842        ;;
1843     auto-host.h )
1844        host_xm_file_list="${host_xm_file_list} $f"
1845        host_xm_include_list="${host_xm_include_list} $f"
1846        ;;
1847     * )
1848        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1849        host_xm_include_list="${host_xm_include_list} config/$f"
1850        ;;
1851   esac
1852 done
1853
1854 build_xm_file_list=
1855 for f in $build_xm_file; do
1856   case $f in
1857     ansidecl.h )
1858        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1859        build_xm_include_list="${build_xm_include_list} $f"
1860        ;;
1861     auto-build.h | auto-host.h )
1862        build_xm_file_list="${build_xm_file_list} $f"
1863        build_xm_include_list="${build_xm_include_list} $f"
1864        ;;
1865     * )
1866        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1867        build_xm_include_list="${build_xm_include_list} config/$f"
1868        ;;
1869   esac
1870 done
1871
1872 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1873 # cross-compiler which does not use the native headers and libraries.
1874 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1875 CROSS=                                          AC_SUBST(CROSS)
1876 ALL=all.internal                                AC_SUBST(ALL)
1877 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1878
1879 if test "x$with_build_sysroot" != x; then
1880   build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1881 else
1882   # This value is used, even on a native system, because
1883   # CROSS_SYSTEM_HEADER_DIR is just
1884   # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1885   build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1886 fi
1887
1888 if test x$host != x$target
1889 then
1890         CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1891         ALL=all.cross
1892         SYSTEM_HEADER_DIR=$build_system_header_dir
1893         case "$host","$target" in
1894         # Darwin crosses can use the host system's libraries and headers,
1895         # because of the fat library support.  Of course, it must be the
1896         # same version of Darwin on both sides.  Allow the user to
1897         # just say --target=foo-darwin without a version number to mean
1898         # "the version on this system".
1899             *-*-darwin*,*-*-darwin*)
1900                 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1901                 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1902                 if test $hostos = $targetos -o $targetos = darwin ; then
1903                     CROSS=
1904                     SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1905                     with_headers=yes
1906                 fi
1907                 ;;
1908
1909             i?86-*-*,x86_64-*-* \
1910             | powerpc*-*-*,powerpc64*-*-*)
1911                 CROSS="$CROSS -DNATIVE_CROSS" ;;
1912         esac
1913
1914         case $target in
1915                 *-*-mingw*)
1916                         if test "x$with_headers" = x; then
1917                                 with_headers=yes
1918                         fi
1919                         ;;
1920                 *)
1921                         ;;
1922         esac
1923 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1924         SYSTEM_HEADER_DIR=$build_system_header_dir
1925 fi
1926
1927 # If this is a cross-compiler that does not
1928 # have its own set of headers then define
1929 # inhibit_libc
1930
1931 # If this is using newlib, without having the headers available now,
1932 # then define inhibit_libc in LIBGCC2_CFLAGS.
1933 # This prevents libgcc2 from containing any code which requires libc
1934 # support.
1935 : ${inhibit_libc=false}
1936 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1937        test x$with_newlib = xyes ; } &&
1938      { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
1939        inhibit_libc=true
1940 fi
1941 AC_SUBST(inhibit_libc)
1942
1943 # When building gcc with a cross-compiler, we need to adjust things so
1944 # that the generator programs are still built with the native compiler.
1945 # Also, we cannot run fixincludes.
1946
1947 # These are the normal (build=host) settings:
1948 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
1949 CXX_FOR_BUILD='$(CXX)'          AC_SUBST(CXX_FOR_BUILD)
1950 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
1951 BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
1952 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
1953 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
1954
1955 # And these apply if build != host, or we are generating coverage data
1956 if test x$build != x$host || test "x$coverage_flags" != x
1957 then
1958     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1959     BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CXXFLAGS_FOR_BUILD)'
1960     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
1961 fi
1962
1963 # Expand extra_headers to include complete path.
1964 # This substitutes for lots of t-* files.
1965 extra_headers_list=
1966 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1967 for file in ${extra_headers} ; do
1968   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1969 done
1970
1971 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
1972 if test x"$use_gcc_tgmath" = xyes
1973 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
1974 fi
1975
1976 # Define collect2 in Makefile.
1977 case $host_can_use_collect2 in
1978   no) collect2= ;;
1979   *) collect2='collect2$(exeext)' ;;
1980 esac
1981 AC_SUBST([collect2])
1982
1983 # Add a definition of USE_COLLECT2 if system wants one.
1984 case $use_collect2 in
1985   no) use_collect2= ;;
1986   "") ;;
1987   *)
1988     host_xm_defines="${host_xm_defines} USE_COLLECT2"
1989     xm_defines="${xm_defines} USE_COLLECT2"
1990     case $host_can_use_collect2 in
1991       no)
1992         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1993         ;;
1994     esac
1995     ;;
1996 esac
1997
1998 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
1999 [Define to the name of the LTO plugin DSO that must be
2000   passed to the linker's -plugin=LIB option.])
2001
2002 # ---------------------------
2003 # Assembler & linker features
2004 # ---------------------------
2005
2006 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
2007 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
2008 # However when ld-new is first executed from the build tree, libtool will
2009 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
2010 # to the build tree.  While doing this we need to use the previous-stage
2011 # linker, or we have an infinite loop.  The presence of a shell script as
2012 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
2013 # the gcc/collect-ld script.  So we need to know how libtool works, or
2014 # exec-tool will fail.
2015
2016 m4_defun([_LT_CONFIG_COMMANDS], [])
2017 AC_PROG_LIBTOOL
2018 AC_SUBST(objdir)
2019 AC_SUBST(enable_fast_install)
2020
2021 # Identify the assembler which will work hand-in-glove with the newly
2022 # built GCC, so that we can examine its features.  This is the assembler
2023 # which will be driven by the driver program.
2024 #
2025 # If build != host, and we aren't building gas in-tree, we identify a
2026 # build->target assembler and hope that it will have the same features
2027 # as the host->target assembler we'll be using.
2028 gcc_cv_gas_major_version=
2029 gcc_cv_gas_minor_version=
2030 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
2031
2032 m4_pattern_allow([AS_FOR_TARGET])dnl
2033 AS_VAR_SET_IF(gcc_cv_as,, [
2034 if test -x "$DEFAULT_ASSEMBLER"; then
2035         gcc_cv_as="$DEFAULT_ASSEMBLER"
2036 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
2037      && test -f ../gas/Makefile \
2038      && test x$build = x$host; then
2039         gcc_cv_as=../gas/as-new$build_exeext
2040 elif test -x as$build_exeext; then
2041         # Build using assembler in the current directory.
2042         gcc_cv_as=./as$build_exeext
2043 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
2044         gcc_cv_as="$AS_FOR_TARGET"
2045 else
2046         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
2047 fi])
2048
2049 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
2050 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
2051 case "$ORIGINAL_AS_FOR_TARGET" in
2052   ./as | ./as$build_exeext) ;;
2053   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
2054 esac
2055
2056 AC_MSG_CHECKING(what assembler to use)
2057 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
2058   # Single tree build which includes gas.  We want to prefer it
2059   # over whatever linker top-level may have detected, since
2060   # we'll use what we're building after installation anyway.
2061   AC_MSG_RESULT(newly built gas)
2062   in_tree_gas=yes
2063   _gcc_COMPUTE_GAS_VERSION
2064   in_tree_gas_is_elf=no
2065   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
2066      || (grep 'obj_format = multi' ../gas/Makefile \
2067          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
2068   then
2069     in_tree_gas_is_elf=yes
2070   fi
2071 else
2072   AC_MSG_RESULT($gcc_cv_as)
2073   in_tree_gas=no
2074 fi
2075
2076 default_ld=
2077 AC_ARG_ENABLE(ld,
2078 [[  --enable-ld[=ARG]       build ld [ARG={default,yes,no}]]],
2079 [case "${enableval}" in
2080  no)
2081    default_ld=ld.gold
2082    ;;
2083  esac])
2084
2085 AC_ARG_ENABLE(gold,
2086 [[  --enable-gold[=ARG]     build gold [ARG={default,yes,no}]]],
2087 [case "${enableval}" in
2088  default)
2089    install_gold_as_default=yes
2090    ;;
2091  yes)
2092    if test x${default_ld} != x; then
2093      install_gold_as_default=yes
2094    fi
2095    ;;
2096  no)
2097    ;;
2098  *)
2099    AC_MSG_ERROR([invalid --enable-gold argument])
2100    ;;
2101  esac],
2102 [install_gold_as_default=no])
2103
2104 # Identify the linker which will work hand-in-glove with the newly
2105 # built GCC, so that we can examine its features.  This is the linker
2106 # which will be driven by the driver program.
2107 #
2108 # If build != host, and we aren't building gas in-tree, we identify a
2109 # build->target linker and hope that it will have the same features
2110 # as the host->target linker we'll be using.
2111 gcc_cv_gld_major_version=
2112 gcc_cv_gld_minor_version=
2113 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
2114 gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
2115 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
2116
2117 AS_VAR_SET_IF(gcc_cv_ld,, [
2118 if test -x "$DEFAULT_LINKER"; then
2119         gcc_cv_ld="$DEFAULT_LINKER"
2120 elif test $install_gold_as_default = yes \
2121      && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
2122      && test -f ../gold/Makefile \
2123      && test x$build = x$host; then
2124         gcc_cv_ld=../gold/ld-new$build_exeext
2125 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
2126      && test -f ../ld/Makefile \
2127      && test x$build = x$host; then
2128         gcc_cv_ld=../ld/ld-new$build_exeext
2129 elif test -x collect-ld$build_exeext; then
2130         # Build using linker in the current directory.
2131         gcc_cv_ld=./collect-ld$build_exeext
2132 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2133         gcc_cv_ld="$LD_FOR_TARGET"
2134 else
2135         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2136 fi])
2137
2138 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2139 PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
2140 # if the PLUGIN_LD is set ld-new, just have it as ld
2141 # as that is the installed named.
2142 if test x$PLUGIN_LD_SUFFIX = xld-new \
2143    || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
2144   PLUGIN_LD_SUFFIX=ld
2145 fi
2146 AC_ARG_WITH(plugin-ld,
2147 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2148 [if test x"$withval" != x; then
2149    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2150    PLUGIN_LD_SUFFIX=`echo $withval | sed -e "s,$target_alias-,,"`
2151  fi])
2152 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2153 AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
2154
2155 # Check to see if we are using gold instead of ld
2156 AC_MSG_CHECKING(whether we are using gold)
2157 ld_is_gold=no
2158 if test x$gcc_cv_ld != x; then
2159   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2160      | grep "GNU gold" > /dev/null; then
2161     ld_is_gold=yes
2162   fi
2163 fi
2164 AC_MSG_RESULT($ld_is_gold)
2165
2166 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2167 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2168 case "$ORIGINAL_LD_FOR_TARGET" in
2169   ./collect-ld | ./collect-ld$build_exeext) ;;
2170   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2171 esac
2172
2173 AC_MSG_CHECKING(what linker to use)
2174 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2175    || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2176         # Single tree build which includes ld.  We want to prefer it
2177         # over whatever linker top-level may have detected, since
2178         # we'll use what we're building after installation anyway.
2179         AC_MSG_RESULT(newly built ld)
2180         in_tree_ld=yes
2181         in_tree_ld_is_elf=no
2182         if (grep 'EMUL = .*elf' ../ld/Makefile \
2183             || grep 'EMUL = .*linux' ../ld/Makefile \
2184             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2185           in_tree_ld_is_elf=yes
2186         elif test "$ld_is_gold" = yes; then
2187           in_tree_ld_is_elf=yes
2188         fi
2189         for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in
2190         do
2191 changequote(,)dnl
2192                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
2193                 if test x$gcc_cv_gld_version != x; then
2194                         break
2195                 fi
2196         done
2197         case $gcc_cv_gld_version in
2198           VERSION=[0-9]*) ;;
2199 changequote([,])dnl
2200           *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
2201 changequote(,)dnl
2202         esac
2203         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2204         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2205 changequote([,])dnl
2206         ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
2207         ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
2208 else
2209         AC_MSG_RESULT($gcc_cv_ld)
2210         in_tree_ld=no
2211         gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
2212         ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
2213         ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
2214 fi
2215
2216 AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
2217 AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)
2218
2219 # Figure out what nm we will be using.
2220 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2221 AS_VAR_SET_IF(gcc_cv_nm,, [
2222 if test -f $gcc_cv_binutils_srcdir/configure.in \
2223      && test -f ../binutils/Makefile \
2224      && test x$build = x$host; then
2225         gcc_cv_nm=../binutils/nm-new$build_exeext
2226 elif test -x nm$build_exeext; then
2227         gcc_cv_nm=./nm$build_exeext
2228 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2229         gcc_cv_nm="$NM_FOR_TARGET"
2230 else
2231         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2232 fi])
2233
2234 AC_MSG_CHECKING(what nm to use)
2235 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2236         # Single tree build which includes binutils.
2237         AC_MSG_RESULT(newly built nm)
2238         in_tree_nm=yes
2239 else
2240         AC_MSG_RESULT($gcc_cv_nm)
2241         in_tree_nm=no
2242 fi
2243
2244 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2245 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2246 case "$ORIGINAL_NM_FOR_TARGET" in
2247   ./nm | ./nm$build_exeext) ;;
2248   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2249 esac
2250
2251
2252 # Figure out what objdump we will be using.
2253 AS_VAR_SET_IF(gcc_cv_objdump,, [
2254 if test -f $gcc_cv_binutils_srcdir/configure.in \
2255      && test -f ../binutils/Makefile \
2256      && test x$build = x$host; then
2257         # Single tree build which includes binutils.
2258         gcc_cv_objdump=../binutils/objdump$build_exeext
2259 elif test -x objdump$build_exeext; then
2260         gcc_cv_objdump=./objdump$build_exeext
2261 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2262         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2263 else
2264         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2265 fi])
2266
2267 AC_MSG_CHECKING(what objdump to use)
2268 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2269         # Single tree build which includes binutils.
2270         AC_MSG_RESULT(newly built objdump)
2271 elif test x$gcc_cv_objdump = x; then
2272         AC_MSG_RESULT(not found)
2273 else
2274         AC_MSG_RESULT($gcc_cv_objdump)
2275 fi
2276
2277 # Figure out what readelf we will be using.
2278 AS_VAR_SET_IF(gcc_cv_readelf,, [
2279 if test -f $gcc_cv_binutils_srcdir/configure.in \
2280      && test -f ../binutils/Makefile \
2281      && test x$build = x$host; then
2282         # Single tree build which includes binutils.
2283         gcc_cv_readelf=../binutils/readelf$build_exeext
2284 elif test -x readelf$build_exeext; then
2285         gcc_cv_readelf=./readelf$build_exeext
2286 else
2287         AC_PATH_PROG(gcc_cv_readelf, readelf)
2288 fi])
2289
2290 AC_MSG_CHECKING(what readelf to use)
2291 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2292         # Single tree build which includes binutils.
2293         AC_MSG_RESULT(newly built readelf)
2294 elif test x$gcc_cv_readelf = x; then
2295         AC_MSG_RESULT(not found)
2296 else
2297         AC_MSG_RESULT($gcc_cv_readelf)
2298 fi
2299
2300 # Figure out what assembler alignment features are present.
2301 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2302  [2,6,0],,
2303 [.balign 4
2304 .p2align 2],,
2305 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2306   [Define if your assembler supports .balign and .p2align.])])
2307
2308 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2309  [2,8,0],,
2310  [.p2align 4,,7],,
2311 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2312   [Define if your assembler supports specifying the maximum number
2313    of bytes to skip when using the GAS .p2align command.])])
2314
2315 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2316  [2,8,0],,
2317  [.literal16],,
2318 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2319   [Define if your assembler supports .literal16.])])
2320
2321 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2322  [elf,2,9,0],,
2323  [conftest_label1: .word 0
2324 .subsection -1
2325 conftest_label2: .word 0
2326 .previous],
2327  [if test x$gcc_cv_nm != x; then
2328     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2329     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2330     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2331     then :
2332     else gcc_cv_as_subsection_m1=yes
2333     fi
2334     rm -f conftest.nm1 conftest.nm2
2335   fi],
2336  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2337   [Define if your assembler supports .subsection and .subsection -1 starts
2338    emitting at the beginning of your section.])])
2339
2340 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2341  [2,2,0],,
2342  [      .weak foobar],,
2343 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2344
2345 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2346  [2,17,0],,
2347  [      .weakref foobar, barfnot],,
2348 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2349
2350 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2351  [2,15,91],,
2352  [      .SPACE $TEXT$
2353         .NSUBSPA $CODE$,COMDAT],,
2354 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2355
2356 # .hidden needs to be supported in both the assembler and the linker,
2357 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2358 # This is irritatingly difficult to feature test for; we have to check the
2359 # date string after the version number.  If we've got an in-tree
2360 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2361 # to be safe.
2362 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2363 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2364  [elf,2,13,0],,
2365 [       .hidden foobar
2366 foobar:])
2367 case "${target}" in
2368   *-*-darwin*)
2369     # Darwin as has some visibility support, though with a different syntax.
2370     gcc_cv_as_hidden=yes
2371     ;;
2372 esac
2373
2374 # gnu_indirect_function type is an extension proposed at
2375 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2376 # selection of function implementation
2377 AC_ARG_ENABLE(gnu-indirect-function,
2378  [AS_HELP_STRING([--enable-gnu-indirect-function],
2379                  [enable the use of the @gnu_indirect_function to glibc systems])],
2380  [case $enable_gnu_indirect_function in
2381     yes | no) ;;
2382     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2383 Valid choices are 'yes' and 'no'.]) ;;
2384   esac],
2385  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2386
2387 gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
2388 AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
2389 [Define if your system supports gnu indirect functions.])
2390
2391
2392 changequote(,)dnl
2393 if test $in_tree_ld != yes ; then
2394   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2395   if echo "$ld_ver" | grep GNU > /dev/null; then
2396     if test x"$ld_is_gold" = xyes; then
2397       # GNU gold --version looks like this:
2398       #
2399       # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
2400       #
2401       # We extract the binutils version which is more familiar and specific
2402       # than the gold version.
2403       ld_vers=`echo $ld_ver | sed -n \
2404           -e 's,^[^)]*[  ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
2405     else
2406       # GNU ld --version looks like this:
2407       #
2408       # GNU ld (GNU Binutils) 2.21.51.20110225
2409       ld_vers=`echo $ld_ver | sed -n \
2410           -e 's,^.*[     ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2411     fi
2412     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2413     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2414     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2415     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2416   else
2417     case "${target}" in
2418       *-*-solaris2*)
2419         # See acinclude.m4 (gcc_SUN_LD_VERSION) for the version number
2420         # format.
2421         #
2422         # Don't reuse gcc_gv_sun_ld_vers_* in case a linker other than
2423         # /usr/ccs/bin/ld has been configured.
2424         ld_ver=`$gcc_cv_ld -V 2>&1`
2425         if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2426           ld_vers=`echo $ld_ver | sed -n \
2427             -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2428           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2429           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2430         fi
2431         ;;
2432     esac
2433   fi
2434 fi
2435 changequote([,])dnl
2436
2437 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2438 [[if test $in_tree_ld = yes ; then
2439   gcc_cv_ld_hidden=no
2440   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2441      && test $in_tree_ld_is_elf = yes; then
2442      gcc_cv_ld_hidden=yes
2443   fi
2444 else
2445   gcc_cv_ld_hidden=yes
2446   if test x"$ld_is_gold" = xyes; then
2447     :
2448   elif echo "$ld_ver" | grep GNU > /dev/null; then
2449     case "${target}" in
2450       mmix-knuth-mmixware)
2451         # The linker emits by default mmo, not ELF, so "no" is appropriate.
2452         gcc_cv_ld_hidden=no
2453         ;;
2454     esac
2455     if test 0"$ld_date" -lt 20020404; then
2456       if test -n "$ld_date"; then
2457         # If there was date string, but was earlier than 2002-04-04, fail
2458         gcc_cv_ld_hidden=no
2459       elif test -z "$ld_vers"; then
2460         # If there was no date string nor ld version number, something is wrong
2461         gcc_cv_ld_hidden=no
2462       else
2463         test -z "$ld_vers_patch" && ld_vers_patch=0
2464         if test "$ld_vers_major" -lt 2; then
2465           gcc_cv_ld_hidden=no
2466         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2467           gcc_cv_ld_hidden="no"
2468         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2469           gcc_cv_ld_hidden=no
2470         fi
2471       fi
2472     fi
2473   else
2474     case "${target}" in
2475       *-*-darwin*)
2476         # Darwin ld has some visibility support.
2477         gcc_cv_ld_hidden=yes
2478         ;;
2479       hppa64*-*-hpux* | ia64*-*-hpux*)
2480         gcc_cv_ld_hidden=yes
2481         ;;
2482       *-*-solaris2.1[0-9]*)
2483         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2484         # .symbolic was only added in Solaris 9 12/02.
2485         gcc_cv_ld_hidden=yes
2486         ;;
2487       *)
2488         gcc_cv_ld_hidden=no
2489         ;;
2490     esac
2491   fi
2492 fi]])
2493 libgcc_visibility=no
2494 AC_SUBST(libgcc_visibility)
2495 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2496 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2497   libgcc_visibility=yes
2498   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2499   [Define if your assembler and linker support .hidden.])
2500 fi
2501
2502 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2503 gcc_cv_ld_ro_rw_mix=unknown
2504 if test $in_tree_ld = yes ; then
2505   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2506      && test $in_tree_ld_is_elf = yes; then
2507     gcc_cv_ld_ro_rw_mix=read-write
2508   fi
2509 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2510   echo '.section myfoosect, "a"' > conftest1.s
2511   echo '.section myfoosect, "aw"' > conftest2.s
2512   echo '.byte 1' >> conftest2.s
2513   echo '.section myfoosect, "a"' > conftest3.s
2514   echo '.byte 0' >> conftest3.s
2515   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2516      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2517      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2518      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2519         conftest2.o conftest3.o > /dev/null 2>&1; then
2520     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2521                          | sed -e '/myfoosect/!d' -e N`
2522     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2523       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2524         gcc_cv_ld_ro_rw_mix=read-only
2525       else
2526         gcc_cv_ld_ro_rw_mix=read-write
2527       fi
2528     fi
2529   fi
2530 changequote(,)dnl
2531   rm -f conftest.* conftest[123].*
2532 changequote([,])dnl
2533 fi
2534 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2535         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2536   [Define if your linker links a mix of read-only
2537    and read-write sections into a read-write section.])
2538 fi
2539 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2540
2541 gcc_AC_INITFINI_ARRAY
2542
2543 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2544 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2545   [elf,2,11,0],,
2546 [       .data
2547         .uleb128 L2 - L1
2548 L1:
2549         .uleb128 1280
2550         .sleb128 -1010
2551 L2:],
2552 [[# GAS versions before 2.11 do not support uleb128,
2553   # despite appearing to.
2554   # ??? There exists an elf-specific test that will crash
2555   # the assembler.  Perhaps it's better to figure out whether
2556   # arbitrary sections are supported and try the test.
2557   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2558   if echo "$as_ver" | grep GNU > /dev/null; then
2559     as_vers=`echo $as_ver | sed -n \
2560         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2561     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2562     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2563     if test $as_major -eq 2 && test $as_minor -lt 11
2564     then :
2565     else gcc_cv_as_leb128=yes
2566     fi
2567   fi]],
2568   [AC_DEFINE(HAVE_AS_LEB128, 1,
2569     [Define if your assembler supports .sleb128 and .uleb128.])])
2570
2571 # Check if we have assembler support for unwind directives.
2572 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2573   ,,
2574 [       .text
2575         .cfi_startproc
2576         .cfi_offset 0, 0
2577         .cfi_same_value 1
2578         .cfi_def_cfa 1, 2
2579         .cfi_escape 1, 2, 3, 4, 5
2580         .cfi_endproc],
2581 [case "$target" in
2582   *-*-solaris*)
2583     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2584     # read-only and read-write sections, we need to make sure that the
2585     # assembler used emits read-write .eh_frame sections.
2586     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2587       if test "x$gcc_cv_objdump" != x; then
2588         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2589                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2590           gcc_cv_as_cfi_directive=no
2591         else
2592           case "$target" in
2593             i?86-*-solaris2.1[[0-9]]* | x86_64-*-solaris2.1[[0-9]]*)
2594               # On Solaris/x86, make sure that GCC and assembler agree on using
2595               # read-only .eh_frame sections for 64-bit.
2596               if test x$gas = xyes; then
2597                  as_ix86_64_opt="--64"
2598               else
2599                  as_ix86_64_opt="-xarch=amd64"
2600               fi
2601               if $gcc_cv_as $as_ix86_64_opt -o conftest.o conftest.s > /dev/null 2>&1 && \
2602                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2603                         sed -e /.eh_frame/!d -e N | \
2604                         grep READONLY > /dev/null; then
2605                 gcc_cv_as_cfi_directive=yes
2606               else
2607                 gcc_cv_as_cfi_directive=no
2608               fi
2609               ;;
2610             *)
2611               gcc_cv_as_cfi_directive=yes
2612               ;;
2613           esac
2614         fi
2615       else
2616         # no objdump, err on the side of caution
2617         gcc_cv_as_cfi_directive=no
2618       fi
2619     else
2620       gcc_cv_as_cfi_directive=yes
2621     fi
2622     ;;
2623   *-*-*)
2624     gcc_cv_as_cfi_directive=yes
2625     ;;
2626 esac])
2627 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2628 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2629   ,,
2630 [       .text
2631         .cfi_startproc
2632         .cfi_adjust_cfa_offset 64
2633         .skip 75040, 0
2634         .cfi_adjust_cfa_offset 128
2635         .cfi_endproc],
2636 [[
2637 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2638     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2639    gcc_cv_as_cfi_advance_working=yes
2640 fi
2641 ]])
2642 else
2643   # no objdump, err on the side of caution
2644   gcc_cv_as_cfi_advance_working=no
2645 fi
2646 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2647 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2648   [`if test $gcc_cv_as_cfi_directive = yes \
2649        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2650   [Define 0/1 if your assembler supports CFI directives.])
2651
2652 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2653 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2654   gcc_cv_as_cfi_personality_directive, ,,
2655 [       .text
2656         .cfi_startproc
2657         .cfi_personality 0, symbol
2658         .cfi_endproc])
2659 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2660   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2661     then echo 1; else echo 0; fi`],
2662   [Define 0/1 if your assembler supports .cfi_personality.])
2663
2664 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2665   gcc_cv_as_cfi_sections_directive, ,,
2666 [       .text
2667         .cfi_sections .debug_frame, .eh_frame
2668         .cfi_startproc
2669         .cfi_endproc],
2670 [case $target_os in
2671   win32 | pe | cygwin* | mingw32* | uwin*)
2672     # Need to check that we generated the correct relocation for the
2673     # .debug_frame section.  This was fixed for binutils 2.21.
2674     gcc_cv_as_cfi_sections_directive=no
2675     if test "x$gcc_cv_objdump" != x; then
2676      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2677         grep secrel > /dev/null; then
2678       gcc_cv_as_cfi_sections_directive=yes
2679      fi
2680     fi
2681     ;;
2682   *)
2683     gcc_cv_as_cfi_sections_directive=yes
2684     ;;
2685 esac])
2686 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2687 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2688   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2689     then echo 1; else echo 0; fi`],
2690   [Define 0/1 if your assembler supports .cfi_sections.])
2691
2692 # GAS versions up to and including 2.11.0 may mis-optimize
2693 # .eh_frame data.
2694 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2695   [elf,2,12,0],,
2696 [       .text
2697 .LFB1:
2698         .4byte  0
2699 .L1:
2700         .4byte  0
2701 .LFE1:
2702         .section        .eh_frame,"aw",@progbits
2703 __FRAME_BEGIN__:
2704         .4byte  .LECIE1-.LSCIE1
2705 .LSCIE1:
2706         .4byte  0x0
2707         .byte   0x1
2708         .ascii "z\0"
2709         .byte   0x1
2710         .byte   0x78
2711         .byte   0x1a
2712         .byte   0x0
2713         .byte   0x4
2714         .4byte  1
2715         .p2align 1
2716 .LECIE1:
2717 .LSFDE1:
2718         .4byte  .LEFDE1-.LASFDE1
2719 .LASFDE1:
2720         .4byte  .LASFDE1-__FRAME_BEGIN__
2721         .4byte  .LFB1
2722         .4byte  .LFE1-.LFB1
2723         .byte   0x4
2724         .4byte  .LFE1-.LFB1
2725         .byte   0x4
2726         .4byte  .L1-.LFB1
2727 .LEFDE1:],
2728 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2729 cat > conftest.lit <<EOF
2730  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2731  0010 01000000 12000000 18000000 00000000  ................
2732  0020 08000000 04080000 0044               .........D      @&t@
2733 EOF
2734 cat > conftest.big <<EOF
2735  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2736  0010 00000001 00000012 00000018 00000000  ................
2737  0020 00000008 04000000 0844               .........D      @&t@
2738 EOF
2739   # If the assembler didn't choke, and we can objdump,
2740   # and we got the correct data, then succeed.
2741   # The text in the here-document typically retains its unix-style line
2742   # endings, while the output of objdump will use host line endings.
2743   # Therefore, use diff -b for the comparisons.
2744   if test x$gcc_cv_objdump != x \
2745   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2746      | tail -3 > conftest.got \
2747   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2748     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2749   then
2750     gcc_cv_as_eh_frame=yes
2751   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2752     gcc_cv_as_eh_frame=buggy
2753   else
2754     # Uh oh, what do we do now?
2755     gcc_cv_as_eh_frame=no
2756   fi])
2757
2758 if test $gcc_cv_as_eh_frame = buggy; then
2759   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2760   [Define if your assembler mis-optimizes .eh_frame data.])
2761 fi
2762
2763 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2764  [elf,2,12,0], [--fatal-warnings],
2765  [.section .rodata.str, "aMS", @progbits, 1])
2766 if test $gcc_cv_as_shf_merge = no; then
2767   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2768     [elf,2,12,0], [--fatal-warnings],
2769     [.section .rodata.str, "aMS", %progbits, 1])
2770 fi
2771 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2772   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2773 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2774
2775 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
2776  gcc_cv_as_comdat_group,
2777  [elf,2,16,0], [--fatal-warnings],
2778  [.section .text,"axG",@progbits,.foo,comdat])
2779 if test $gcc_cv_as_comdat_group = yes; then
2780   gcc_cv_as_comdat_group_percent=no
2781   gcc_cv_as_comdat_group_group=no
2782 else
2783  gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
2784    gcc_cv_as_comdat_group_percent,
2785    [elf,2,16,0], [--fatal-warnings],
2786    [.section .text,"axG",%progbits,.foo,comdat])
2787  if test $gcc_cv_as_comdat_group_percent = yes; then
2788    gcc_cv_as_comdat_group_group=no
2789  else
2790    if test -z "${gcc_cv_as_comdat_group_group+set}"; then
2791      gcc_cv_as_comdat_group_group=no
2792    fi
2793    case "${target}" in
2794      # Sun as uses a completely different syntax.
2795      *-*-solaris2*)
2796        case "${target}" in
2797          sparc*-*-solaris2*)
2798            conftest_s='
2799                .group foo,".text%foo",#comdat
2800                .section ".text%foo", #alloc,#execinstr,#progbits
2801                .globl foo
2802              foo:
2803              '
2804            ;;
2805          i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
2806            conftest_s='
2807                .group foo,.text%foo,#comdat
2808                .section .text%foo, "ax", @progbits
2809                .globl  foo
2810              foo:
2811              '
2812            ;;
2813        esac
2814        gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
2815          gcc_cv_as_comdat_group_group,
2816          ,, [$conftest_s])
2817        ;;
2818    esac
2819  fi
2820 fi
2821 if test x"$ld_is_gold" = xyes; then
2822   comdat_group=yes
2823 elif test $in_tree_ld = yes ; then
2824   comdat_group=no
2825   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2826      && test $in_tree_ld_is_elf = yes; then
2827      comdat_group=yes
2828   fi
2829 elif echo "$ld_ver" | grep GNU > /dev/null; then
2830   comdat_group=yes
2831   if test 0"$ld_date" -lt 20050308; then
2832     if test -n "$ld_date"; then
2833       # If there was date string, but was earlier than 2005-03-08, fail
2834       comdat_group=no
2835     elif test "$ld_vers_major" -lt 2; then
2836       comdat_group=no
2837     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2838       comdat_group=no
2839     fi
2840   fi
2841 else
2842 changequote(,)dnl
2843   case "${target}" in
2844     *-*-solaris2.1[1-9]*)
2845       comdat_group=no
2846       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
2847       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
2848       # version 1.688.
2849       #
2850       # If using Sun as for COMDAT group as emitted by GCC, one needs at
2851       # least ld version 1.2267.
2852       if test "$ld_vers_major" -gt 1; then
2853         comdat_group=yes
2854       elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
2855         comdat_group=yes
2856       elif test "$ld_vers_minor" -ge 2267; then
2857         comdat_group=yes
2858       fi
2859       ;;
2860     *)
2861       # Assume linkers other than GNU ld don't support COMDAT group.
2862       comdat_group=no
2863       ;;
2864   esac
2865 changequote([,])dnl
2866 fi
2867 # Allow overriding the automatic COMDAT group tests above.
2868 AC_ARG_ENABLE(comdat,
2869   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
2870   [comdat_group="$enable_comdat"])
2871 if test $comdat_group = no; then
2872   gcc_cv_as_comdat_group=no
2873   gcc_cv_as_comdat_group_percent=no
2874   gcc_cv_as_comdat_group_group=no
2875 fi
2876 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2877   [`if test $gcc_cv_as_comdat_group = yes \
2878     || test $gcc_cv_as_comdat_group_percent = yes \
2879     || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
2880 [Define 0/1 if your assembler and linker support COMDAT groups.])
2881
2882 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2883  gcc_cv_as_discriminator,
2884  [2,19,51],,
2885 [       .text
2886         .file 1 "conf.c"
2887         .loc 1 1 0 discriminator 1],,
2888 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2889   [Define if your assembler supports the .loc discriminator sub-directive.])])
2890
2891 # Thread-local storage - the check is heavily parameterized.
2892 conftest_s=
2893 tls_first_major=
2894 tls_first_minor=
2895 tls_as_opt=
2896 case "$target" in
2897 changequote(,)dnl
2898   alpha*-*-*)
2899     conftest_s='
2900         .section ".tdata","awT",@progbits
2901 foo:    .long   25
2902         .text
2903         ldq     $27,__tls_get_addr($29)         !literal!1
2904         lda     $16,foo($29)                    !tlsgd!1
2905         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
2906         ldq     $27,__tls_get_addr($29)         !literal!2
2907         lda     $16,foo($29)                    !tlsldm!2
2908         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
2909         ldq     $1,foo($29)                     !gotdtprel
2910         ldah    $2,foo($29)                     !dtprelhi
2911         lda     $3,foo($2)                      !dtprello
2912         lda     $4,foo($29)                     !dtprel
2913         ldq     $1,foo($29)                     !gottprel
2914         ldah    $2,foo($29)                     !tprelhi
2915         lda     $3,foo($2)                      !tprello
2916         lda     $4,foo($29)                     !tprel'
2917         tls_first_major=2
2918         tls_first_minor=13
2919         tls_as_opt=--fatal-warnings
2920         ;;
2921   cris-*-*|crisv32-*-*)
2922     conftest_s='
2923         .section ".tdata","awT",@progbits
2924 x:      .long   25
2925         .text
2926         move.d x:IE,$r10
2927         nop'
2928         tls_first_major=2
2929         tls_first_minor=20
2930         tls_as_opt=--fatal-warnings
2931         ;;
2932   frv*-*-*)
2933     conftest_s='
2934         .section ".tdata","awT",@progbits
2935 x:      .long   25
2936         .text
2937         call    #gettlsoff(x)'
2938         tls_first_major=2
2939         tls_first_minor=14
2940         ;;
2941   hppa*-*-linux*)
2942     conftest_s='
2943 t1:     .reg    %r20
2944 t2:     .reg    %r21
2945 gp:     .reg    %r19
2946         .section ".tdata","awT",@progbits
2947 foo:    .long   25
2948         .text
2949         .align  4
2950         addil LT%foo-$tls_gdidx$,gp
2951         ldo RT%foo-$tls_gdidx$(%r1),%arg0
2952         b __tls_get_addr
2953         nop
2954         addil LT%foo-$tls_ldidx$,gp
2955         b __tls_get_addr
2956         ldo RT%foo-$tls_ldidx$(%r1),%arg0
2957         addil LR%foo-$tls_dtpoff$,%ret0
2958         ldo RR%foo-$tls_dtpoff$(%r1),%t1
2959         mfctl %cr27,%t1
2960         addil LT%foo-$tls_ieoff$,gp
2961         ldw RT%foo-$tls_ieoff$(%r1),%t2
2962         add %t1,%t2,%t3
2963         mfctl %cr27,%t1
2964         addil LR%foo-$tls_leoff$,%t1
2965         ldo RR%foo-$tls_leoff$(%r1),%t2'
2966         tls_first_major=2
2967         tls_first_minor=15
2968         tls_as_opt=--fatal-warnings
2969         ;;
2970   arm*-*-*)
2971     conftest_s='
2972         .section ".tdata","awT",%progbits
2973 foo:    .long   25
2974         .text
2975 .word foo(gottpoff)
2976 .word foo(tpoff)
2977 .word foo(tlsgd)
2978 .word foo(tlsldm)
2979 .word foo(tlsldo)'
2980         tls_first_major=2
2981         tls_first_minor=17
2982         ;;
2983   i[34567]86-*-* | x86_64-*-*)
2984     case "$target" in
2985       i[34567]86-*-solaris2.* | x86_64-*-solaris2.1[0-9]*)
2986         on_solaris=yes
2987         ;;
2988       *)
2989         on_solaris=no
2990         ;;
2991     esac
2992     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2993       conftest_s='
2994         .section .tdata,"awt",@progbits'
2995       tls_first_major=0
2996       tls_first_minor=0
2997       tls_section_flag=t
2998 changequote([,])dnl
2999       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
3000 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
3001 changequote(,)dnl
3002     else
3003       conftest_s='
3004         .section ".tdata","awT",@progbits'
3005       tls_first_major=2
3006       tls_first_minor=14
3007       tls_section_flag=T
3008       tls_as_opt="--fatal-warnings"
3009     fi
3010     case "$target" in
3011       i[34567]86-*-*)
3012         conftest_s="$conftest_s
3013 foo:    .long   25
3014         .text
3015         movl    %gs:0, %eax
3016         leal    foo@tlsgd(,%ebx,1), %eax
3017         leal    foo@tlsldm(%ebx), %eax
3018         leal    foo@dtpoff(%eax), %edx
3019         movl    foo@gottpoff(%ebx), %eax
3020         subl    foo@gottpoff(%ebx), %eax
3021         addl    foo@gotntpoff(%ebx), %eax
3022         movl    foo@indntpoff, %eax
3023         movl    \$foo@tpoff, %eax
3024         subl    \$foo@tpoff, %eax
3025         leal    foo@ntpoff(%ecx), %eax"
3026         ;;
3027       x86_64-*-*)
3028         if test x$on_solaris = xyes; then
3029           case $gas_flag in
3030             yes) tls_as_opt="$tls_as_opt --64" ;;
3031             no)  tls_as_opt="$tls_as_opt -xarch=amd64" ;;
3032           esac
3033         fi
3034         conftest_s="$conftest_s
3035 foo:    .long   25
3036         .text
3037         movq    %fs:0, %rax
3038         leaq    foo@tlsgd(%rip), %rdi
3039         leaq    foo@tlsld(%rip), %rdi
3040         leaq    foo@dtpoff(%rax), %rdx
3041         movq    foo@gottpoff(%rip), %rax
3042         movq    \$foo@tpoff, %rax"
3043         ;;
3044     esac
3045     ;;
3046   ia64-*-*)
3047     conftest_s='
3048         .section ".tdata","awT",@progbits
3049 foo:    data8   25
3050         .text
3051         addl    r16 = @ltoff(@dtpmod(foo#)), gp
3052         addl    r17 = @ltoff(@dtprel(foo#)), gp
3053         addl    r18 = @ltoff(@tprel(foo#)), gp
3054         addl    r19 = @dtprel(foo#), gp
3055         adds    r21 = @dtprel(foo#), r13
3056         movl    r23 = @dtprel(foo#)
3057         addl    r20 = @tprel(foo#), gp
3058         adds    r22 = @tprel(foo#), r13
3059         movl    r24 = @tprel(foo#)'
3060         tls_first_major=2
3061         tls_first_minor=13
3062         tls_as_opt=--fatal-warnings
3063         ;;
3064   microblaze*-*-*)
3065     conftest_s='
3066         .section .tdata,"awT",@progbits
3067 x:
3068         .word 2
3069         .text
3070         addik r5,r20,x@TLSGD
3071         addik r5,r20,x@TLSLDM'
3072         tls_first_major=2
3073         tls_first_minor=20
3074         tls_as_opt='--fatal-warnings'
3075         ;;
3076   mips*-*-*)
3077     conftest_s='
3078         .section .tdata,"awT",@progbits
3079 x:
3080         .word 2
3081         .text
3082         addiu $4, $28, %tlsgd(x)
3083         addiu $4, $28, %tlsldm(x)
3084         lui $4, %dtprel_hi(x)
3085         addiu $4, $4, %dtprel_lo(x)
3086         lw $4, %gottprel(x)($28)
3087         lui $4, %tprel_hi(x)
3088         addiu $4, $4, %tprel_lo(x)'
3089         tls_first_major=2
3090         tls_first_minor=16
3091         tls_as_opt='-32 --fatal-warnings'
3092         ;;
3093   m68k-*-*)
3094     conftest_s='
3095         .section .tdata,"awT",@progbits
3096 x:
3097         .word 2
3098         .text
3099 foo:
3100         move.l x@TLSGD(%a5),%a0
3101         move.l x@TLSLDM(%a5),%a0
3102         move.l x@TLSLDO(%a5),%a0
3103         move.l x@TLSIE(%a5),%a0
3104         move.l x@TLSLE(%a5),%a0'
3105         tls_first_major=2
3106         tls_first_minor=19
3107         tls_as_opt='--fatal-warnings'
3108         ;;
3109   nios2-*-*)
3110       conftest_s='
3111         .section ".tdata","awT",@progbits'
3112         tls_first_major=2
3113         tls_first_minor=23
3114         tls_as_opt="--fatal-warnings"
3115         ;;
3116   aarch64*-*-*)
3117     conftest_s='
3118         .section ".tdata","awT",%progbits
3119 foo:    .long   25
3120         .text
3121         adrp  x0, :tlsgd:x
3122         add   x0, x0, #:tlsgd_lo12:x
3123         bl    __tls_get_addr
3124         nop'
3125         tls_first_major=2
3126         tls_first_minor=20
3127         tls_as_opt='--fatal-warnings'
3128         ;;
3129   powerpc-ibm-aix*)
3130     conftest_s='
3131         .extern __get_tpointer
3132         .toc
3133 LC..1:
3134         .tc a[TC],a[TL]@le
3135         .csect .text[PR]
3136 .tlstest:
3137         lwz 9,LC..1(2)
3138         bla __get_tpointer
3139         lwzx 3,9,3
3140         .globl a
3141         .csect a[TL],4
3142 a:
3143         .space 4'
3144         tls_first_major=0
3145         tls_first_minor=0
3146         ;;
3147   powerpc64*-*-*)
3148     conftest_s='
3149         .section ".tdata","awT",@progbits
3150         .align 3
3151 ld0:    .space 8
3152 ld1:    .space 8
3153 x1:     .space 8
3154 x2:     .space 8
3155 x3:     .space 8
3156         .text
3157         addi 3,2,ld0@got@tlsgd
3158         bl .__tls_get_addr
3159         nop
3160         addi 3,2,ld1@toc
3161         bl .__tls_get_addr
3162         nop
3163         addi 3,2,x1@got@tlsld
3164         bl .__tls_get_addr
3165         nop
3166         addi 9,3,x1@dtprel
3167         bl .__tls_get_addr
3168         nop
3169         addis 9,3,x2@dtprel@ha
3170         addi 9,9,x2@dtprel@l
3171         bl .__tls_get_addr
3172         nop
3173         ld 9,x3@got@dtprel(2)
3174         add 9,9,3
3175         bl .__tls_get_addr
3176         nop'
3177         tls_first_major=2
3178         tls_first_minor=14
3179         tls_as_opt="-a64 --fatal-warnings"
3180         ;;
3181   powerpc*-*-*)
3182     conftest_s='
3183         .section ".tdata","awT",@progbits
3184         .align 2
3185 ld0:    .space 4
3186 ld1:    .space 4
3187 x1:     .space 4
3188 x2:     .space 4
3189 x3:     .space 4
3190         .text
3191         addi 3,31,ld0@got@tlsgd
3192         bl __tls_get_addr
3193         addi 3,31,x1@got@tlsld
3194         bl __tls_get_addr
3195         addi 9,3,x1@dtprel
3196         addis 9,3,x2@dtprel@ha
3197         addi 9,9,x2@dtprel@l
3198         lwz 9,x3@got@tprel(31)
3199         add 9,9,x@tls
3200         addi 9,2,x1@tprel
3201         addis 9,2,x2@tprel@ha
3202         addi 9,9,x2@tprel@l'
3203         tls_first_major=2
3204         tls_first_minor=14
3205         tls_as_opt="-a32 --fatal-warnings"
3206         ;;
3207   s390-*-*)
3208     conftest_s='
3209         .section ".tdata","awT",@progbits
3210 foo:    .long   25
3211         .text
3212         .long   foo@TLSGD
3213         .long   foo@TLSLDM
3214         .long   foo@DTPOFF
3215         .long   foo@NTPOFF
3216         .long   foo@GOTNTPOFF
3217         .long   foo@INDNTPOFF
3218         l       %r1,foo@GOTNTPOFF(%r12)
3219         l       %r1,0(%r1):tls_load:foo
3220         bas     %r14,0(%r1,%r13):tls_gdcall:foo
3221         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
3222         tls_first_major=2
3223         tls_first_minor=14
3224         tls_as_opt="-m31 --fatal-warnings"
3225         ;;
3226   s390x-*-*)
3227     conftest_s='
3228         .section ".tdata","awT",@progbits
3229 foo:    .long   25
3230         .text
3231         .quad   foo@TLSGD
3232         .quad   foo@TLSLDM
3233         .quad   foo@DTPOFF
3234         .quad   foo@NTPOFF
3235         .quad   foo@GOTNTPOFF
3236         lg      %r1,foo@GOTNTPOFF(%r12)
3237         larl    %r1,foo@INDNTPOFF
3238         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
3239         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
3240         tls_first_major=2
3241         tls_first_minor=14
3242         tls_as_opt="-m64 -Aesame --fatal-warnings"
3243         ;;
3244   sh-*-* | sh[34]-*-*)
3245     conftest_s='
3246         .section ".tdata","awT",@progbits
3247 foo:    .long   25
3248         .text
3249         .long   foo@TLSGD
3250         .long   foo@TLSLDM
3251         .long   foo@DTPOFF
3252         .long   foo@GOTTPOFF
3253         .long   foo@TPOFF'
3254         tls_first_major=2
3255         tls_first_minor=13
3256         tls_as_opt=--fatal-warnings
3257         ;;
3258   sparc*-*-*)
3259     case "$target" in
3260       sparc*-sun-solaris2.*)
3261         on_solaris=yes
3262         ;;
3263       *)
3264         on_solaris=no
3265         ;;
3266     esac
3267     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3268       conftest_s='
3269         .section ".tdata",#alloc,#write,#tls'
3270         tls_first_major=0
3271         tls_first_minor=0
3272     else
3273       conftest_s='
3274         .section ".tdata","awT",@progbits'
3275         tls_first_major=2
3276         tls_first_minor=14
3277         tls_as_opt="-32 --fatal-warnings"
3278     fi
3279     conftest_s="$conftest_s
3280 foo:    .long   25
3281         .text
3282         sethi   %tgd_hi22(foo), %o0
3283         add     %o0, %tgd_lo10(foo), %o1
3284         add     %l7, %o1, %o0, %tgd_add(foo)
3285         call    __tls_get_addr, %tgd_call(foo)
3286         sethi   %tldm_hi22(foo), %l1
3287         add     %l1, %tldm_lo10(foo), %l2
3288         add     %l7, %l2, %o0, %tldm_add(foo)
3289         call    __tls_get_addr, %tldm_call(foo)
3290         sethi   %tldo_hix22(foo), %l3
3291         xor     %l3, %tldo_lox10(foo), %l4
3292         add     %o0, %l4, %l5, %tldo_add(foo)
3293         sethi   %tie_hi22(foo), %o3
3294         add     %o3, %tie_lo10(foo), %o3
3295         ld      [%l7 + %o3], %o2, %tie_ld(foo)
3296         add     %g7, %o2, %o4, %tie_add(foo)
3297         sethi   %tle_hix22(foo), %l1
3298         xor     %l1, %tle_lox10(foo), %o5
3299         ld      [%g7 + %o5], %o1"
3300         ;;
3301   tilepro*-*-*)
3302       conftest_s='
3303         .section ".tdata","awT",@progbits
3304 foo:    .long   25
3305         .text
3306         addli   r0, zero, tls_gd(foo)
3307         auli    r0, zero, tls_gd_ha16(foo)
3308         addli   r0, r0, tls_gd_lo16(foo)
3309         jal     __tls_get_addr
3310         addli   r0, zero, tls_ie(foo)
3311         auli    r0, r0, tls_ie_ha16(foo)
3312         addli   r0, r0, tls_ie_lo16(foo)'
3313         tls_first_major=2
3314         tls_first_minor=22
3315         tls_as_opt="--fatal-warnings"
3316         ;;
3317   tilegx*-*-*)
3318       conftest_s='
3319         .section ".tdata","awT",@progbits
3320 foo:    .long   25
3321         .text
3322         shl16insli r0, zero, hw0_last_tls_gd(foo)
3323         shl16insli r0, zero, hw1_last_tls_gd(foo)
3324         shl16insli r0, r0,   hw0_tls_gd(foo)
3325         jal        __tls_get_addr
3326         shl16insli r0, zero, hw1_last_tls_ie(foo)
3327         shl16insli r0, r0,   hw0_tls_ie(foo)'
3328         tls_first_major=2
3329         tls_first_minor=22
3330         tls_as_opt="--fatal-warnings"
3331         ;;
3332   xtensa*-*-*)
3333     conftest_s='
3334         .section ".tdata","awT",@progbits
3335 foo:    .long   25
3336         .text
3337         movi    a8, foo@TLSFUNC
3338         movi    a10, foo@TLSARG
3339         callx8.tls a8, foo@TLSCALL'
3340         tls_first_major=2
3341         tls_first_minor=19
3342         ;;
3343 changequote([,])dnl
3344 esac
3345 set_have_as_tls=no
3346 if test "x$enable_tls" = xno ; then
3347   : # TLS explicitly disabled.
3348 elif test "x$enable_tls" = xyes ; then
3349   set_have_as_tls=yes # TLS explicitly enabled.
3350 elif test -z "$tls_first_major"; then
3351   : # If we don't have a check, assume no support.
3352 else
3353   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3354   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3355   [set_have_as_tls=yes])
3356 fi
3357 if test $set_have_as_tls = yes ; then
3358   AC_DEFINE(HAVE_AS_TLS, 1,
3359             [Define if your assembler and linker support thread-local storage.])
3360 fi
3361
3362 # Target-specific assembler checks.
3363
3364 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3365 gcc_cv_ld_static_dynamic=no
3366 gcc_cv_ld_static_option='-Bstatic'
3367 gcc_cv_ld_dynamic_option='-Bdynamic'
3368 if test $in_tree_ld = yes ; then
3369   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3370     gcc_cv_ld_static_dynamic=yes
3371   fi
3372 elif test x$gcc_cv_ld != x; then
3373   # Check if linker supports -Bstatic/-Bdynamic option
3374   if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3375      && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3376       gcc_cv_ld_static_dynamic=yes
3377   else
3378     case "$target" in
3379       # AIX ld uses -b flags
3380       *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
3381         gcc_cv_ld_static_dynamic=yes
3382         gcc_cv_ld_static_option="-bstatic"
3383         gcc_cv_ld_dynamic_option="-bdynamic"
3384         ;;
3385       # HP-UX ld uses -a flags to select between shared and archive.
3386       *-*-hpux*)
3387         if test x"$gnu_ld" = xno; then
3388           gcc_cv_ld_static_dynamic=yes
3389           gcc_cv_ld_static_option="-aarchive_shared"
3390           gcc_cv_ld_dynamic_option="-adefault"
3391         fi
3392         ;;
3393       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3394       *-*-solaris2*)
3395         gcc_cv_ld_static_dynamic=yes
3396         ;;
3397     esac
3398   fi
3399 fi
3400 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3401         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3402 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3403         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3404 [Define to the linker option to disable use of shared objects.])
3405         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3406 [Define to the linker option to enable use of shared objects.])
3407 fi
3408 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3409
3410 if test x"$demangler_in_ld" = xyes; then
3411   AC_MSG_CHECKING(linker --demangle support)
3412   gcc_cv_ld_demangle=no
3413   if test $in_tree_ld = yes; then
3414     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3415       gcc_cv_ld_demangle=yes
3416     fi
3417   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3418     # Check if the GNU linker supports --demangle option
3419     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3420       gcc_cv_ld_demangle=yes
3421     fi
3422   fi
3423   if test x"$gcc_cv_ld_demangle" = xyes; then
3424     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3425 [Define if your linker supports --demangle option.])
3426   fi
3427   AC_MSG_RESULT($gcc_cv_ld_demangle)
3428 fi
3429
3430 AC_MSG_CHECKING(linker plugin support)
3431 gcc_cv_lto_plugin=0
3432 if test -f liblto_plugin.la; then
3433   save_ld_ver="$ld_ver"
3434   save_ld_vers_major="$ld_vers_major"
3435   save_ld_vers_minor="$ld_vers_minor"
3436   save_ld_is_gold="$ld_is_gold"
3437
3438   ld_is_gold=no
3439
3440   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
3441     ld_ver="GNU ld"
3442     # FIXME: ld_is_gold?
3443     ld_vers_major="$gcc_cv_gld_major_version"
3444     ld_vers_minor="$gcc_cv_gld_minor_version"
3445   else
3446     # Determine plugin linker version.
3447     # FIXME: Partial duplicate from above, generalize.
3448 changequote(,)dnl
3449     ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
3450     if echo "$ld_ver" | grep GNU > /dev/null; then
3451       if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
3452         ld_is_gold=yes
3453         ld_vers=`echo $ld_ver | sed -n \
3454             -e 's,^[^)]*[        ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3455       else
3456         ld_vers=`echo $ld_ver | sed -n \
3457             -e 's,^.*[   ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3458       fi
3459       ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3460       ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3461     fi
3462 changequote([,])dnl
3463   fi
3464
3465   # Determine plugin support.
3466   if echo "$ld_ver" | grep GNU > /dev/null; then
3467     # Require GNU ld or gold 2.21+ for plugin support by default.
3468     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
3469       gcc_cv_lto_plugin=2
3470     # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
3471     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
3472       gcc_cv_lto_plugin=1
3473     fi
3474   fi
3475
3476   ld_ver="$save_ld_ver"
3477   ld_vers_major="$save_ld_vers_major"
3478   ld_vers_minor="$save_ld_vers_minor"
3479   ld_is_gold="$save_ld_is_gold"
3480 fi
3481 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
3482   [Define to the level of your linker's plugin support.])
3483 AC_MSG_RESULT($gcc_cv_lto_plugin)
3484
3485 case "$target" in
3486   aarch64*-*-*)
3487     gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,,
3488                           [-mabi=lp64], [.text],,,)
3489     if test x$gcc_cv_as_aarch64_mabi = xyes; then
3490       AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
3491                 [Define if your assembler supports the -mabi option.])
3492     else
3493       if test x$with_abi = xilp32; then
3494         AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3495                      Upgrade the Assembler.])
3496       fi
3497       if test x"$with_multilib_list" = xdefault; then
3498         TM_MULTILIB_CONFIG=lp64
3499       else
3500         aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
3501         for aarch64_multilib in ${aarch64_multilibs}; do
3502           case ${aarch64_multilib} in
3503             ilp32)
3504               AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3505                             Upgrade the Assembler.])
3506               ;;
3507             *)
3508               ;;
3509           esac
3510         done
3511       fi
3512     fi
3513     ;;
3514
3515   # All TARGET_ABI_OSF targets.
3516   alpha*-*-linux* | alpha*-*-*bsd*)
3517     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3518         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3519 [       .set nomacro
3520         .text
3521         extbl   $3, $2, $3      !lituse_bytoff!1
3522         ldq     $2, a($29)      !literal!1
3523         ldq     $4, b($29)      !literal!2
3524         ldq_u   $3, 0($2)       !lituse_base!1
3525         ldq     $27, f($29)     !literal!5
3526         jsr     $26, ($27), f   !lituse_jsr!5
3527         ldah    $29, 0($26)     !gpdisp!3
3528         lda     $0, c($29)      !gprel
3529         ldah    $1, d($29)      !gprelhigh
3530         lda     $1, d($1)       !gprellow
3531         lda     $29, 0($29)     !gpdisp!3],,
3532     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3533   [Define if your assembler supports explicit relocations.])])
3534     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3535         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3536 [       .set nomacro
3537         .text
3538         ldq     $27, a($29)     !literal!1
3539         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3540     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3541   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3542     ;;
3543
3544   cris-*-*)
3545     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3546       gcc_cv_as_cris_no_mul_bug,[2,15,91],
3547       [-no-mul-bug-abort], [.text],,
3548       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3549                 [Define if your assembler supports the -no-mul-bug-abort option.])])
3550     ;;
3551
3552   sparc*-*-*)
3553     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3554       [.register %g2, #scratch],,
3555       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3556                 [Define if your assembler supports .register.])])
3557
3558     gcc_GAS_CHECK_FEATURE([@%:@nobits], gcc_cv_as_sparc_nobits,,,
3559       [.section "nobits",#alloc,#write,#nobits
3560        .section "progbits",#alloc,#write,#progbits])
3561     AC_DEFINE_UNQUOTED(HAVE_AS_SPARC_NOBITS,
3562       [`if test $gcc_cv_as_sparc_nobits = yes; then echo 1; else echo 0; fi`],
3563       [Define to 1 if your assembler supports #nobits, 0 otherwise.])
3564
3565     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3566       [-relax], [.text],,
3567       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3568                 [Define if your assembler supports -relax option.])])
3569
3570     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3571       gcc_cv_as_sparc_gotdata_op,,
3572       [-K PIC],
3573 [.text
3574 .align 4
3575 foo:
3576         nop
3577 bar:
3578         sethi %gdop_hix22(foo), %g1
3579         xor    %g1, %gdop_lox10(foo), %g1
3580         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3581       [if test x$gcc_cv_ld != x \
3582        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3583          if test x$gcc_cv_objdump != x; then
3584            if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3585               | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3586                gcc_cv_as_sparc_gotdata_op=no
3587            else
3588                gcc_cv_as_sparc_gotdata_op=yes
3589            fi
3590          fi
3591        fi
3592        rm -f conftest],
3593       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3594                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3595
3596     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3597       gcc_cv_as_sparc_ua_pcrel,,
3598       [-K PIC],
3599 [.text
3600 foo:
3601         nop
3602 .data
3603 .align 4
3604 .byte 0
3605 .uaword %r_disp32(foo)],
3606       [if test x$gcc_cv_ld != x \
3607        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3608          gcc_cv_as_sparc_ua_pcrel=yes
3609        fi
3610        rm -f conftest],
3611       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3612                 [Define if your assembler and linker support unaligned PC relative relocs.])
3613
3614       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3615         gcc_cv_as_sparc_ua_pcrel_hidden,,
3616         [-K PIC],
3617 [.data
3618 .align 4
3619 .byte 0x31
3620 .uaword %r_disp32(foo)
3621 .byte 0x32, 0x33, 0x34
3622 .global foo
3623 .hidden foo
3624 foo:
3625 .skip 4],
3626         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3627          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3628          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3629             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3630             if $gcc_cv_objdump -R conftest 2> /dev/null \
3631                | grep 'DISP32' > /dev/null 2>&1; then
3632                 :
3633             else
3634                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3635             fi
3636          fi
3637          rm -f conftest],
3638          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3639                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3640     ]) # unaligned pcrel relocs
3641
3642     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3643       gcc_cv_as_sparc_offsetable_lo10,,
3644       [-xarch=v9],
3645 [.text
3646         or %g1, %lo(ab) + 12, %g1
3647         or %g1, %lo(ab + 12), %g1],
3648       [if test x$gcc_cv_objdump != x \
3649        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3650           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3651          gcc_cv_as_sparc_offsetable_lo10=yes
3652        fi],
3653        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3654                  [Define if your assembler supports offsetable %lo().])])
3655
3656     gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
3657       gcc_cv_as_sparc_fmaf,,
3658       [-xarch=v9d],
3659       [.text
3660        .register %g2, #scratch
3661        .register %g3, #scratch
3662        .align 4
3663        fmaddd %f0, %f2, %f4, %f6
3664        addxccc %g1, %g2, %g3
3665        fsrl32 %f2, %f4, %f8
3666        fnaddd %f10, %f12, %f14],,
3667       [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
3668                 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
3669
3670     gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
3671       gcc_cv_as_sparc_sparc4,,
3672       [-xarch=sparc4],
3673       [.text
3674        .register %g2, #scratch
3675        .register %g3, #scratch
3676        .align 4
3677        cxbe %g2, %g3, 1f
3678 1:     cwbneg %g2, %g3, 1f
3679 1:     sha1
3680        md5
3681        aes_kexpand0 %f4, %f6, %f8
3682        des_round %f38, %f40, %f42, %f44
3683        camellia_f %f54, %f56, %f58, %f60
3684        kasumi_fi_xor %f46, %f48, %f50, %f52],,
3685       [AC_DEFINE(HAVE_AS_SPARC4, 1,
3686                 [Define if your assembler supports SPARC4 instructions.])])
3687
3688     gcc_GAS_CHECK_FEATURE([LEON instructions],
3689       gcc_cv_as_sparc_leon,,
3690       [-Aleon],
3691       [.text
3692        .register %g2, #scratch
3693        .register %g3, #scratch
3694        .align 4
3695        smac %g2, %g3, %g1
3696        umac %g2, %g3, %g1
3697        casa [[%g2]] 0xb, %g3, %g1],,
3698       [AC_DEFINE(HAVE_AS_LEON, 1,
3699                 [Define if your assembler supports LEON instructions.])])
3700     ;;
3701
3702 changequote(,)dnl
3703   i[34567]86-*-* | x86_64-*-*)
3704 changequote([,])dnl
3705     case $target_os in
3706       cygwin*)
3707         # Full C++ conformance when using a shared libstdc++-v3 requires some
3708         # support from the Cygwin DLL, which in more recent versions exports
3709         # wrappers to aid in interposing and redirecting operators new, delete,
3710         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
3711         # are configuring for a version of Cygwin that exports the wrappers.
3712         if test x$host = x$target && test x$host_cpu = xi686; then
3713           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3714         else
3715           # Can't check presence of libc functions during cross-compile, so
3716           # we just have to assume we're building for an up-to-date target.
3717           gcc_ac_cygwin_dll_wrappers=yes
3718         fi
3719         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3720           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3721           [Define if you want to generate code by default that assumes that the
3722            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3723     esac
3724     case $target_os in
3725       cygwin* | pe | mingw32* | interix*)
3726         # Recent binutils allows the three-operand form of ".comm" on PE.  This
3727         # definition is used unconditionally to initialise the default state of
3728         # the target option variable that governs usage of the feature.
3729         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3730          [2,19,52],,[.comm foo,1,32])
3731         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3732           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3733           [Define if your assembler supports specifying the alignment
3734            of objects allocated using the GAS .comm command.])
3735         # Used for DWARF 2 in PE
3736         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3737           gcc_cv_as_ix86_pe_secrel32,
3738           [2,15,91],,
3739 [.text
3740 foo:    nop
3741 .data
3742         .secrel32 foo],
3743           [if test x$gcc_cv_ld != x \
3744            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3745              gcc_cv_as_ix86_pe_secrel32=yes
3746            fi
3747            rm -f conftest],
3748           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3749             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3750         # Test if the assembler supports the extended form of the .section
3751         # directive that specifies section alignment.  LTO support uses this,
3752         # but normally only after installation, so we warn but don't fail the
3753         # configure if LTO is enabled but the assembler does not support it.
3754         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
3755           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
3756         if test x$gcc_cv_as_section_has_align != xyes; then
3757           case ",$enable_languages," in
3758             *,lto,*)
3759               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
3760               ;;
3761           esac
3762         fi
3763         # Test if the assembler supports the section flag 'e' for specifying
3764         # an excluded section.
3765         gcc_GAS_CHECK_FEATURE([.section with e], gcc_cv_as_section_has_e,
3766           [2,22,51],,
3767 [.section foo1,"e"
3768 .byte 0,0,0,0])
3769         AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
3770           [`if test $gcc_cv_as_section_has_e = yes; then echo 1; else echo 0; fi`],
3771           [Define if your assembler supports specifying the section flag e.])
3772         ;;
3773     esac
3774
3775     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3776        gcc_cv_as_ix86_filds,,,
3777        [filds mem; fists mem],,
3778        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3779          [Define if your assembler uses filds and fists mnemonics.])])
3780
3781     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3782        gcc_cv_as_ix86_fildq,,,
3783        [fildq mem; fistpq mem],,
3784        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3785          [Define if your assembler uses fildq and fistq mnemonics.])])
3786
3787     gcc_GAS_CHECK_FEATURE([cmov syntax],
3788       gcc_cv_as_ix86_cmov_sun_syntax,,,
3789       [cmovl.l %edx, %eax],,
3790       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3791         [Define if your assembler supports the Sun syntax for cmov.])])
3792
3793     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3794       gcc_cv_as_ix86_ffreep,,,
3795       [ffreep %st(1)],,
3796       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3797         [Define if your assembler supports the ffreep mnemonic.])])
3798
3799     gcc_GAS_CHECK_FEATURE([.quad directive],
3800       gcc_cv_as_ix86_quad,,,
3801       [.quad 0],,
3802       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
3803         [Define if your assembler supports the .quad directive.])])
3804
3805     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3806       gcc_cv_as_ix86_sahf,,,
3807       [.code64
3808        sahf],,
3809       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3810         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
3811
3812     gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
3813       gcc_cv_as_ix86_interunit_movq,,,
3814       [.code64
3815        movq %mm0, %rax
3816        movq %rax, %xmm0])
3817     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
3818       [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
3819       [Define if your assembler supports interunit movq mnemonic.])
3820
3821     gcc_GAS_CHECK_FEATURE([hle prefixes],
3822       gcc_cv_as_ix86_hle,,,
3823       [lock xacquire cmpxchg %esi, (%ecx)],,
3824       [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
3825         [Define if your assembler supports HLE prefixes.])])
3826
3827     gcc_GAS_CHECK_FEATURE([swap suffix],
3828       gcc_cv_as_ix86_swap,,,
3829       [movl.s %esp, %ebp],,
3830       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3831         [Define if your assembler supports the swap suffix.])])
3832
3833     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3834       gcc_cv_as_ix86_diff_sect_delta,,,
3835       [.section .rodata
3836 .L1:
3837         .long .L2-.L1
3838         .long .L3-.L1
3839         .text
3840 .L3:    nop
3841 .L2:    nop],,
3842       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3843         [Define if your assembler supports the subtraction of symbols in different sections.])])
3844
3845     # These two are used unconditionally by i386.[ch]; it is to be defined
3846     # to 1 if the feature is present, 0 otherwise.
3847     as_ix86_gotoff_in_data_opt=
3848     if test x$gas = xyes; then
3849       as_ix86_gotoff_in_data_opt="--32"
3850     fi
3851     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3852       gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
3853       [$as_ix86_gotoff_in_data_opt],
3854 [       .text
3855 .L0:
3856         nop
3857         .data
3858         .long .L0@GOTOFF])
3859     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3860       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3861       [Define true if the assembler supports '.long foo@GOTOFF'.])
3862
3863     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
3864         gcc_cv_as_ix86_rep_lock_prefix,,,
3865         [rep movsl
3866          rep ret
3867          rep nop
3868          rep bsf %ecx, %eax
3869          rep bsr %ecx, %eax
3870          lock addl %edi, (%eax,%esi)
3871          lock orl $0, (%esp)],,
3872         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
3873           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
3874
3875     gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
3876         gcc_cv_as_ix86_ud2,,,
3877         [ud2],,
3878       [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
3879         [Define if your assembler supports the 'ud2' mnemonic.])])
3880
3881     gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
3882         gcc_cv_as_ix86_tlsgdplt,,,
3883         [call    tls_gd@tlsgdplt],
3884         [if test x$gcc_cv_ld != x \
3885          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3886            gcc_cv_as_ix86_tlsgdplt=yes
3887          fi
3888          rm -f conftest],
3889       [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
3890         [Define if your assembler and linker support @tlsgdplt.])])
3891
3892     conftest_s='
3893         .section .tdata,"aw'$tls_section_flag'",@progbits
3894 tls_ld:
3895         .section .text,"ax",@progbits
3896          call    tls_ld@tlsldmplt'
3897     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
3898         gcc_cv_as_ix86_tlsldmplt,,,
3899         [$conftest_s],
3900         [if test x$gcc_cv_ld != x \
3901          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3902            gcc_cv_as_ix86_tlsldmplt=yes
3903          fi
3904          rm -f conftest])
3905     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
3906       [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
3907       [Define to 1 if your assembler and linker support @tlsldmplt.])
3908
3909     # Enforce 32-bit output with gas and gld.
3910     if test x$gas = xyes; then
3911       as_ix86_tls_ldm_opt="--32"
3912     fi
3913     if echo "$ld_ver" | grep GNU > /dev/null; then
3914       if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
3915         ld_ix86_tls_ldm_opt="-melf_i386_sol2"
3916       else
3917         ld_ix86_tls_ldm_opt="-melf_i386"
3918       fi
3919     fi
3920     conftest_s='
3921         .section .text,"ax",@progbits
3922         .globl  _start
3923         .type   _start, @function
3924 _start:
3925         leal    value@tlsldm(%ebx), %eax
3926         call    ___tls_get_addr@plt
3927
3928         .section .tdata,"aw'$tls_section_flag'",@progbits
3929         .type   value, @object
3930 value:'
3931     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
3932         gcc_cv_as_ix86_tlsldm,,
3933         [$as_ix86_tls_ldm_opt],
3934         [$conftest_s],
3935         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3936             && $gcc_cv_ld $ld_ix86_tls_ldm_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
3937            if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
3938               || dis conftest 2>/dev/null | grep nop > /dev/null; then
3939              gcc_cv_as_ix86_tlsldm=yes
3940            fi
3941          fi
3942          rm -f conftest])
3943     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
3944       [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
3945       [Define to 1 if your assembler and linker support @tlsldm.])
3946
3947     ;;
3948
3949   ia64*-*-*)
3950     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3951         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3952 [       .text
3953         addl r15 = @ltoffx(x#), gp
3954         ;;
3955         ld8.mov r16 = [[r15]], x#],,
3956     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3957           [Define if your assembler supports ltoffx and ldxmov relocations.])])
3958
3959     ;;
3960
3961   powerpc*-*-*)
3962     case $target in
3963       *-*-aix*) conftest_s='    .machine "pwr5"
3964         .csect .text[[PR]]
3965         mfcr 3,128';;
3966       *-*-darwin*)
3967         gcc_GAS_CHECK_FEATURE([.machine directive support],
3968           gcc_cv_as_machine_directive,,,
3969           [     .machine ppc7400])
3970         if test x$gcc_cv_as_machine_directive != xyes; then
3971           echo "*** This target requires an assembler supporting \".machine\"" >&2
3972           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
3973           test x$build = x$target && exit 1
3974         fi
3975         conftest_s='    .text
3976         mfcr r3,128';;
3977       *) conftest_s='   .machine power4
3978         .text
3979         mfcr 3,128';;
3980     esac
3981
3982     gcc_GAS_CHECK_FEATURE([mfcr field support],
3983       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
3984       [$conftest_s],,
3985       [AC_DEFINE(HAVE_AS_MFCRF, 1,
3986           [Define if your assembler supports mfcr field.])])
3987
3988     case $target in
3989       *-*-aix*) conftest_s='    .machine "pwr5"
3990         .csect .text[[PR]]
3991         popcntb 3,3';;
3992       *) conftest_s='   .machine power5
3993         .text
3994         popcntb 3,3';;
3995     esac
3996
3997     gcc_GAS_CHECK_FEATURE([popcntb support],
3998       gcc_cv_as_powerpc_popcntb, [2,17,0],,
3999       [$conftest_s],,
4000       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
4001           [Define if your assembler supports popcntb field.])])
4002
4003     case $target in
4004       *-*-aix*) conftest_s='    .machine "pwr5x"
4005         .csect .text[[PR]]
4006         frin 1,1';;
4007       *) conftest_s='   .machine power5
4008         .text
4009         frin 1,1';;
4010     esac
4011
4012     gcc_GAS_CHECK_FEATURE([fp round support],
4013       gcc_cv_as_powerpc_fprnd, [2,17,0],,
4014       [$conftest_s],,
4015       [AC_DEFINE(HAVE_AS_FPRND, 1,
4016           [Define if your assembler supports fprnd.])])
4017
4018     case $target in
4019       *-*-aix*) conftest_s='    .machine "pwr6"
4020         .csect .text[[PR]]
4021         mffgpr 1,3';;
4022       *) conftest_s='   .machine power6
4023         .text
4024         mffgpr 1,3';;
4025     esac
4026
4027     gcc_GAS_CHECK_FEATURE([move fp gpr support],
4028       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
4029       [$conftest_s],,
4030       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
4031           [Define if your assembler supports mffgpr and mftgpr.])])
4032
4033     case $target in
4034       *-*-aix*) conftest_s='    .csect .text[[PR]]
4035 LCF..0:
4036         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
4037       *-*-darwin*)
4038         conftest_s='    .text
4039 LCF0:
4040         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
4041       *) conftest_s='   .text
4042 .LCF0:
4043         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
4044     esac
4045
4046     gcc_GAS_CHECK_FEATURE([rel16 relocs],
4047       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
4048       [$conftest_s],,
4049       [AC_DEFINE(HAVE_AS_REL16, 1,
4050           [Define if your assembler supports R_PPC_REL16 relocs.])])
4051
4052     case $target in
4053       *-*-aix*) conftest_s='    .machine "pwr6"
4054         .csect .text[[PR]]
4055         cmpb 3,4,5';;
4056       *) conftest_s='   .machine power6
4057         .text
4058         cmpb 3,4,5';;
4059     esac
4060
4061     gcc_GAS_CHECK_FEATURE([compare bytes support],
4062       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
4063       [$conftest_s],,
4064       [AC_DEFINE(HAVE_AS_CMPB, 1,
4065           [Define if your assembler supports cmpb.])])
4066
4067     case $target in
4068       *-*-aix*) conftest_s='    .machine "pwr6"
4069         .csect .text[[PR]]
4070         dadd 1,2,3';;
4071       *) conftest_s='   .machine power6
4072         .text
4073         dadd 1,2,3';;
4074     esac
4075
4076     gcc_GAS_CHECK_FEATURE([decimal float support],
4077       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
4078       [$conftest_s],,
4079       [AC_DEFINE(HAVE_AS_DFP, 1,
4080           [Define if your assembler supports DFP instructions.])])
4081
4082     case $target in
4083       *-*-aix*) conftest_s='    .machine "pwr7"
4084         .csect .text[[PR]]
4085         lxvd2x 1,2,3';;
4086       *) conftest_s='   .machine power7
4087         .text
4088         lxvd2x 1,2,3';;
4089     esac
4090
4091     gcc_GAS_CHECK_FEATURE([vector-scalar support],
4092       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
4093       [$conftest_s],,
4094       [AC_DEFINE(HAVE_AS_VSX, 1,
4095           [Define if your assembler supports VSX instructions.])])
4096
4097     case $target in
4098       *-*-aix*) conftest_s='    .machine "pwr7"
4099         .csect .text[[PR]]
4100         popcntd 3,3';;
4101       *) conftest_s='   .machine power7
4102         .text
4103         popcntd 3,3';;
4104     esac
4105
4106     gcc_GAS_CHECK_FEATURE([popcntd support],
4107       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
4108       [$conftest_s],,
4109       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
4110           [Define if your assembler supports POPCNTD instructions.])])
4111
4112     case $target in
4113       *-*-aix*) conftest_s='    .machine "pwr8"
4114         .csect .text[[PR]]';;
4115       *) conftest_s='   .machine power8
4116         .text';;
4117     esac
4118
4119     gcc_GAS_CHECK_FEATURE([power8 support],
4120       gcc_cv_as_powerpc_power8, [2,19,2], -a32,
4121       [$conftest_s],,
4122       [AC_DEFINE(HAVE_AS_POWER8, 1,
4123           [Define if your assembler supports POWER8 instructions.])])
4124
4125     case $target in
4126       *-*-aix*) conftest_s='    .csect .text[[PR]]
4127         lwsync';;
4128       *) conftest_s='   .text
4129         lwsync';;
4130     esac
4131
4132     gcc_GAS_CHECK_FEATURE([lwsync support],
4133       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
4134       [$conftest_s],,
4135       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
4136           [Define if your assembler supports LWSYNC instructions.])])
4137
4138     case $target in
4139       *-*-aix*) conftest_s='    .machine "476"
4140         .csect .text[[PR]]
4141         dci 0';;
4142       *) conftest_s='   .machine "476"
4143         .text
4144         dci 0';;
4145     esac
4146
4147     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
4148       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
4149       [$conftest_s],,
4150       [AC_DEFINE(HAVE_AS_DCI, 1,
4151           [Define if your assembler supports the DCI/ICI instructions.])])
4152
4153     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4154       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
4155       [.gnu_attribute 4,1],,
4156       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4157           [Define if your assembler supports .gnu_attribute.])])
4158
4159     gcc_GAS_CHECK_FEATURE([tls marker support],
4160       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
4161       [ bl __tls_get_addr(x@tlsgd)],,
4162       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
4163           [Define if your assembler supports arg info for __tls_get_addr.])])
4164
4165     case $target in
4166       *-*-aix*)
4167         gcc_GAS_CHECK_FEATURE([.ref support],
4168           gcc_cv_as_aix_ref, [2,21,0],,
4169           [     .csect stuff[[rw]]
4170              stuff:
4171                 .long 1
4172                 .extern sym
4173                 .ref sym
4174           ],,
4175           [AC_DEFINE(HAVE_AS_REF, 1,
4176             [Define if your assembler supports .ref])])
4177         ;;
4178     esac
4179     ;;
4180
4181   mips*-*-*)
4182     gcc_GAS_CHECK_FEATURE([explicit relocation support],
4183       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
4184 [       lw $4,%gp_rel(foo)($4)],,
4185       [if test x$target_cpu_default = x
4186        then target_cpu_default=MASK_EXPLICIT_RELOCS
4187        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
4188        fi])
4189     gcc_GAS_CHECK_FEATURE([-mno-shared support],
4190       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
4191       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
4192                  [Define if the assembler understands -mno-shared.])])
4193
4194     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4195       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
4196       [.gnu_attribute 4,1],,
4197       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4198           [Define if your assembler supports .gnu_attribute.])])
4199
4200     gcc_GAS_CHECK_FEATURE([.micromips support],
4201       gcc_cv_as_micromips_support,,[--fatal-warnings],
4202       [.set micromips],,
4203       [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
4204           [Define if your assembler supports the .set micromips directive])])
4205
4206     gcc_GAS_CHECK_FEATURE([.dtprelword support],
4207       gcc_cv_as_mips_dtprelword, [2,18,0],,
4208       [.section .tdata,"awT",@progbits
4209 x:
4210         .word 2
4211         .text
4212         .dtprelword x+0x8000],,
4213       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
4214           [Define if your assembler supports .dtprelword.])])
4215
4216     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
4217       gcc_cv_as_mips_dspr1_mult,,,
4218 [       .set    mips32r2
4219         .set    nodspr2
4220         .set    dsp
4221         madd    $ac3,$4,$5
4222         maddu   $ac3,$4,$5
4223         msub    $ac3,$4,$5
4224         msubu   $ac3,$4,$5
4225         mult    $ac3,$4,$5
4226         multu   $ac3,$4,$5],,
4227       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
4228           [Define if your assembler supports DSPR1 mult.])])
4229
4230     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
4231     gcc_cv_as_ld_jalr_reloc=no
4232     if test $gcc_cv_as_mips_explicit_relocs = yes; then
4233       if test $in_tree_ld = yes ; then
4234         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
4235            && test $in_tree_ld_is_elf = yes; then
4236           gcc_cv_as_ld_jalr_reloc=yes
4237         fi
4238       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
4239         echo '  .ent x' > conftest.s
4240         echo 'x:        lw $2,%got_disp(y)($3)' >> conftest.s
4241         echo '  lw $25,%call16(y)($28)' >> conftest.s
4242         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
4243         echo '1:        jalr $25' >> conftest.s
4244         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
4245         echo '1:        jalr $25' >> conftest.s
4246         echo '  .end x' >> conftest.s
4247         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
4248            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
4249           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
4250              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
4251             gcc_cv_as_ld_jalr_reloc=yes
4252           fi
4253         fi
4254         rm -f conftest.*
4255       fi
4256     fi
4257     if test $gcc_cv_as_ld_jalr_reloc = yes; then
4258       if test x$target_cpu_default = x; then
4259         target_cpu_default=MASK_RELAX_PIC_CALLS
4260       else
4261         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
4262       fi
4263     fi
4264     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
4265
4266     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
4267       [gcc_cv_ld_mips_personality_relaxation],
4268       [gcc_cv_ld_mips_personality_relaxation=no
4269        if test $in_tree_ld = yes ; then
4270          if test "$gcc_cv_gld_major_version" -eq 2 \
4271                  -a "$gcc_cv_gld_minor_version" -ge 21 \
4272                  -o "$gcc_cv_gld_major_version" -gt 2; then
4273            gcc_cv_ld_mips_personality_relaxation=yes
4274          fi
4275        elif test x$gcc_cv_as != x \
4276                  -a x$gcc_cv_ld != x \
4277                  -a x$gcc_cv_readelf != x ; then
4278          cat > conftest.s <<EOF
4279         .cfi_startproc
4280         .cfi_personality 0x80,indirect_ptr
4281         .ent test
4282 test:
4283         nop
4284         .end test
4285         .cfi_endproc
4286
4287         .section .data,"aw",@progbits
4288 indirect_ptr:
4289         .dc.a personality
4290 EOF
4291          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
4292             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
4293            if $gcc_cv_readelf -d conftest 2>&1 \
4294               | grep TEXTREL > /dev/null 2>&1; then
4295              :
4296            elif $gcc_cv_readelf --relocs conftest 2>&1 \
4297                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
4298              :
4299            else
4300              gcc_cv_ld_mips_personality_relaxation=yes
4301            fi
4302          fi
4303        fi
4304        rm -f conftest.s conftest.o conftest])
4305     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
4306             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
4307       [Define if your linker can relax absolute .eh_frame personality
4308 pointers into PC-relative form.])
4309     fi
4310
4311     gcc_GAS_CHECK_FEATURE([-mnan= support],
4312       gcc_cv_as_mips_nan,,
4313       [-mnan=2008],,,
4314       [AC_DEFINE(HAVE_AS_NAN, 1,
4315                  [Define if the assembler understands -mnan=.])])
4316     if test x$gcc_cv_as_mips_nan = xno \
4317        && test x$with_nan != x; then
4318       AC_MSG_ERROR(
4319         [Requesting --with-nan= requires assembler support for -mnan=])
4320     fi
4321     ;;
4322 esac
4323
4324 # Mips and HP-UX need the GNU assembler.
4325 # Linux on IA64 might be able to use the Intel assembler.
4326
4327 case "$target" in
4328   mips*-*-* | *-*-hpux* )
4329     if test x$gas_flag = xyes \
4330        || test x"$host" != x"$build" \
4331        || test ! -x "$gcc_cv_as" \
4332        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
4333       :
4334     else
4335       echo "*** This configuration requires the GNU assembler" >&2
4336       exit 1
4337     fi
4338     ;;
4339 esac
4340
4341 # ??? Not all targets support dwarf2 debug_line, even within a version
4342 # of gas.  Moreover, we need to emit a valid instruction to trigger any
4343 # info to the output file.  So, as supported targets are added to gas 2.11,
4344 # add some instruction here to (also) show we expect this might work.
4345 # ??? Once 2.11 is released, probably need to add first known working
4346 # version to the per-target configury.
4347 case "$cpu_type" in
4348   aarch64 | alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze \
4349   | mips | nios2 | pa | rs6000 | score | sparc | spu | tilegx | tilepro \
4350   | xstormy16 | xtensa)
4351     insn="nop"
4352     ;;
4353   ia64 | s390)
4354     insn="nop 0"
4355     ;;
4356   mmix)
4357     insn="swym 0"
4358     ;;
4359 esac
4360 if test x"$insn" != x; then
4361  conftest_s="\
4362         .file 1 \"conftest.s\"
4363         .loc 1 3 0
4364         $insn"
4365  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
4366   gcc_cv_as_dwarf2_debug_line,
4367   [elf,2,11,0],, [$conftest_s],
4368   [if test x$gcc_cv_objdump != x \
4369    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
4370       | grep debug_line > /dev/null 2>&1; then
4371      gcc_cv_as_dwarf2_debug_line=yes
4372    fi])
4373
4374 # The .debug_line file table must be in the exact order that
4375 # we specified the files, since these indices are also used
4376 # by DW_AT_decl_file.  Approximate this test by testing if
4377 # the assembler bitches if the same index is assigned twice.
4378  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
4379   gcc_cv_as_dwarf2_file_buggy,,,
4380 [       .file 1 "foo.s"
4381         .file 1 "bar.s"])
4382
4383  if test $gcc_cv_as_dwarf2_debug_line = yes \
4384  && test $gcc_cv_as_dwarf2_file_buggy = no; then
4385         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
4386   [Define if your assembler supports dwarf2 .file/.loc directives,
4387    and preserves file table indices exactly as given.])
4388  fi
4389
4390  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
4391   gcc_cv_as_gdwarf2_flag,
4392   [elf,2,11,0], [--gdwarf2], [$insn],,
4393   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
4394 [Define if your assembler supports the --gdwarf2 option.])])
4395
4396  gcc_GAS_CHECK_FEATURE([--gstabs option],
4397   gcc_cv_as_gstabs_flag,
4398   [elf,2,11,0], [--gstabs], [$insn],,
4399   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
4400 [Define if your assembler supports the --gstabs option.])])
4401
4402  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
4403   gcc_cv_as_debug_prefix_map_flag,
4404   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
4405   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
4406 [Define if your assembler supports the --debug-prefix-map option.])])
4407 fi
4408
4409 gcc_GAS_CHECK_FEATURE([compressed debug sections],
4410   gcc_cv_as_compress_debug,,[--compress-debug-sections],,
4411   [# gas compiled without zlib cannot compress debug sections and warns
4412    # about it, but still exits successfully.  So check for this, too.
4413    if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
4414    then
4415      gcc_cv_as_compress_debug=0
4416    elif $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s > /dev/null 2>&1
4417    then
4418      gcc_cv_as_compress_debug=1
4419      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4420      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4421    else
4422      gcc_cv_as_compress_debug=0
4423    # FIXME: Future gas versions will support ELF gABI style via
4424    # --compress-debug-sections[=type].
4425    fi])
4426 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
4427 [Define to the level of your assembler's compressed debug section support.])
4428 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
4429 [Define to the assembler option to enable compressed debug sections.])
4430 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
4431 [Define to the assembler option to disable compressed debug sections.])
4432
4433 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
4434  ,,
4435 [.lcomm bar,4,16],,
4436 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
4437   [Define if your assembler supports .lcomm with an alignment field.])])
4438
4439 if test x$with_sysroot = x && test x$host = x$target \
4440    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4441    && test "$prefix" != "NONE"; then
4442   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4443 [Define to PREFIX/include if cpp should also search that directory.])
4444 fi
4445
4446 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4447   if test "x$with_headers" != x; then
4448     target_header_dir=$with_headers
4449   elif test "x$with_sysroot" = x; then
4450     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
4451   elif test "x$with_build_sysroot" != "x"; then
4452     target_header_dir="${with_build_sysroot}${native_system_header_dir}"
4453   elif test "x$with_sysroot" = xyes; then
4454     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
4455   else
4456     target_header_dir="${with_sysroot}${native_system_header_dir}"
4457   fi
4458 else
4459   target_header_dir=${native_system_header_dir}
4460 fi
4461
4462 # Determine the version of glibc, if any, used on the target.
4463 AC_MSG_CHECKING([for target glibc version])
4464 AC_ARG_WITH([glibc-version],
4465   [AS_HELP_STRING([--with-glibc-version=M.N],
4466     [assume GCC used with glibc version M.N or later])], [
4467 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
4468   glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
4469   glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
4470 else
4471   AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
4472 fi], [
4473 glibc_version_major=0
4474 glibc_version_minor=0
4475 [if test -f $target_header_dir/features.h \
4476   && glibc_version_major_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC__[    ]+[0-9]' $target_header_dir/features.h` \
4477   && glibc_version_minor_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+[0-9]' $target_header_dir/features.h`; then
4478   glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[      ]*//'`
4479   glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[        ]*//'`
4480 fi]])
4481 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
4482
4483 AC_ARG_ENABLE(gnu-unique-object,
4484  [AS_HELP_STRING([--enable-gnu-unique-object],
4485    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
4486  [case $enable_gnu_unique_object in
4487     yes | no) ;;
4488     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
4489 Valid choices are 'yes' and 'no'.]) ;;
4490   esac],
4491  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
4492    [elf,2,19,52],,
4493    [.type foo, '$target_type_format_char'gnu_unique_object],,
4494 # We need to unquote above to to use the definition from config.gcc.
4495 # Also check for ld.so support, i.e. glibc 2.11 or higher.
4496    [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
4497    )])
4498 if test x$enable_gnu_unique_object = xyes; then
4499   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
4500    [Define if your assembler supports @gnu_unique_object.])
4501 fi
4502
4503 AC_CACHE_CHECK([assembler for tolerance to line number 0],
4504  [gcc_cv_as_line_zero],
4505  [gcc_cv_as_line_zero=no
4506   if test $in_tree_gas = yes; then
4507     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
4508   elif test "x$gcc_cv_as" != x; then
4509     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
4510     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
4511        test "x`cat conftest.out`" = x
4512     then
4513       gcc_cv_as_line_zero=yes
4514     else
4515       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
4516       cat conftest.s >&AS_MESSAGE_LOG_FD
4517       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
4518       cat conftest.out >&AS_MESSAGE_LOG_FD
4519     fi
4520     rm -f conftest.o conftest.s conftest.out
4521   fi])
4522 if test "x$gcc_cv_as_line_zero" = xyes; then
4523   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
4524 [Define if the assembler won't complain about a line such as # 0 "" 2.])
4525 fi
4526
4527 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
4528 gcc_cv_ld_eh_frame_hdr=no
4529 if test $in_tree_ld = yes ; then
4530   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
4531      && test $in_tree_ld_is_elf = yes; then
4532     gcc_cv_ld_eh_frame_hdr=yes
4533   fi
4534 elif test x$gcc_cv_ld != x; then
4535   if echo "$ld_ver" | grep GNU > /dev/null; then
4536     # Check if linker supports --eh-frame-hdr option
4537     if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
4538       gcc_cv_ld_eh_frame_hdr=yes
4539     fi
4540   else
4541     case "$target" in
4542       *-*-solaris2*)
4543         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
4544         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
4545           gcc_cv_ld_eh_frame_hdr=yes
4546         fi
4547         ;;
4548     esac
4549   fi
4550 fi
4551 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
4552 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
4553         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
4554 [Define if your linker supports .eh_frame_hdr.])
4555 fi
4556 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
4557
4558 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
4559 gcc_cv_ld_eh_frame_ciev3=no
4560 if test $in_tree_ld = yes ; then
4561   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4562      && test $in_tree_ld_is_elf = yes; then
4563     gcc_cv_ld_eh_frame_ciev3=yes
4564   fi
4565 elif test x$gcc_cv_ld != x; then
4566   if echo "$ld_ver" | grep GNU > /dev/null; then
4567     gcc_cv_ld_eh_frame_ciev3=yes
4568     if test 0"$ld_date" -lt 20040513; then
4569       if test -n "$ld_date"; then
4570         # If there was date string, but was earlier than 2004-05-13, fail
4571         gcc_cv_ld_eh_frame_ciev3=no
4572       elif test "$ld_vers_major" -lt 2; then
4573         gcc_cv_ld_eh_frame_ciev3=no
4574       elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
4575         gcc_cv_ld_eh_frame_ciev3=no
4576       fi
4577     fi
4578   else
4579     case "$target" in
4580       *-*-solaris2*)
4581         # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
4582         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
4583           gcc_cv_ld_eh_frame_ciev3=yes
4584         fi
4585         ;;
4586     esac
4587   fi
4588 fi
4589 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
4590   [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
4591   [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
4592 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
4593
4594 AC_MSG_CHECKING(linker position independent executable support)
4595 gcc_cv_ld_pie=no
4596 if test $in_tree_ld = yes ; then
4597   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
4598      && test $in_tree_ld_is_elf = yes; then
4599     gcc_cv_ld_pie=yes
4600   fi
4601 elif test x$gcc_cv_ld != x; then
4602         # Check if linker supports -pie option
4603         if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
4604                 gcc_cv_ld_pie=yes
4605         fi
4606 fi
4607 if test x"$gcc_cv_ld_pie" = xyes; then
4608         AC_DEFINE(HAVE_LD_PIE, 1,
4609 [Define if your linker supports -pie option.])
4610 fi
4611 AC_MSG_RESULT($gcc_cv_ld_pie)
4612
4613 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
4614 gcc_cv_ld_eh_gc_sections=no
4615 if test $in_tree_ld = yes ; then
4616   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
4617      && test $in_tree_ld_is_elf = yes; then
4618     gcc_cv_ld_eh_gc_sections=yes
4619   fi
4620 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
4621   cat > conftest.s <<EOF
4622         .section        .text
4623 .globl _start
4624         .type _start, @function
4625 _start:
4626         .long foo
4627         .size _start, .-_start
4628         .section        .text.foo,"ax",@progbits
4629         .type foo, @function
4630 foo:
4631         .long 0
4632         .size foo, .-foo
4633         .section        .gcc_except_table.foo,"a",@progbits
4634 .L0:
4635         .long 0
4636         .section        .eh_frame,"a",@progbits
4637         .long .L0
4638 EOF
4639   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4640     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4641          | grep "gc-sections option ignored" > /dev/null; then
4642       gcc_cv_ld_eh_gc_sections=no
4643     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4644          | grep gcc_except_table > /dev/null; then
4645       gcc_cv_ld_eh_gc_sections=yes
4646       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
4647       if test x$gcc_cv_as_comdat_group != xyes; then
4648         gcc_cv_ld_eh_gc_sections=no
4649         cat > conftest.s <<EOF
4650         .section        .text
4651 .globl _start
4652         .type _start, @function
4653 _start:
4654         .long foo
4655         .size _start, .-_start
4656         .section        .gnu.linkonce.t.foo,"ax",@progbits
4657         .type foo, @function
4658 foo:
4659         .long 0
4660         .size foo, .-foo
4661         .section        .gcc_except_table.foo,"a",@progbits
4662 .L0:
4663         .long 0
4664         .section        .eh_frame,"a",@progbits
4665         .long .L0
4666 EOF
4667         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4668           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4669                | grep "gc-sections option ignored" > /dev/null; then
4670             gcc_cv_ld_eh_gc_sections=no
4671           elif $gcc_cv_objdump -h conftest 2> /dev/null \
4672                | grep gcc_except_table > /dev/null; then
4673             gcc_cv_ld_eh_gc_sections=yes
4674           fi
4675         fi
4676       fi
4677     fi
4678   fi
4679   rm -f conftest.s conftest.o conftest
4680 fi
4681 case "$target" in
4682   hppa*-*-linux*)
4683     # ??? This apparently exposes a binutils bug with PC-relative relocations.
4684     gcc_cv_ld_eh_gc_sections=no
4685     ;;
4686 esac
4687 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
4688         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
4689   [Define if your linker supports garbage collection of
4690    sections in presence of EH frames.])
4691 fi
4692 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
4693
4694 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
4695 gcc_cv_ld_eh_gc_sections_bug=no
4696 if test $in_tree_ld = yes ; then
4697   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
4698      && test $in_tree_ld_is_elf = yes; then
4699     gcc_cv_ld_eh_gc_sections_bug=yes
4700   fi
4701 elif test x$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
4702   gcc_cv_ld_eh_gc_sections_bug=yes
4703   cat > conftest.s <<EOF
4704         .section        .text
4705 .globl _start
4706         .type _start, @function
4707 _start:
4708         .long foo
4709         .size _start, .-_start
4710         .section        .text.startup.foo,"ax",@progbits
4711         .type foo, @function
4712 foo:
4713         .long 0
4714         .size foo, .-foo
4715         .section        .gcc_except_table.foo,"a",@progbits
4716 .L0:
4717         .long 0
4718         .section        .eh_frame,"a",@progbits
4719         .long .L0
4720 EOF
4721   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4722     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4723          | grep "gc-sections option ignored" > /dev/null; then
4724       :
4725     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4726          | grep gcc_except_table > /dev/null; then
4727       gcc_cv_ld_eh_gc_sections_bug=no
4728     fi
4729   fi
4730   rm -f conftest.s conftest.o conftest
4731 fi
4732 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
4733         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
4734   [Define if your linker has buggy garbage collection of
4735    sections support when .text.startup.foo like sections are used.])
4736 fi
4737 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
4738
4739 AC_MSG_CHECKING(linker for compressed debug sections)
4740 # gold/gld support compressed debug sections since binutils 2.19/2.21
4741 if test $in_tree_ld = yes ; then
4742   gcc_cv_ld_compress_debug=0
4743   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 19 -o "$gcc_cv_gld_major_version" -gt 2 \
4744      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = yes; then
4745     gcc_cv_ld_compress_debug=2
4746     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
4747   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2 \
4748      && test $in_tree_ld_is_elf = yes; then
4749     gcc_cv_ld_compress_debug=1
4750   fi
4751 elif echo "$ld_ver" | grep GNU > /dev/null; then
4752   gcc_cv_ld_compress_debug=1
4753   if test 0"$ld_date" -lt 20050308; then
4754     if test -n "$ld_date"; then
4755       # If there was date string, but was earlier than 2005-03-08, fail
4756       gcc_cv_ld_compress_debug=0
4757     elif test "$ld_vers_major" -lt 2; then
4758       gcc_cv_ld_compress_debug=0
4759     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 21; then
4760       gcc_cv_ld_compress_debug=0
4761     fi
4762   fi
4763   if test $ld_is_gold = yes; then
4764     gcc_cv_ld_compress_debug=2
4765     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
4766   fi
4767 else
4768 changequote(,)dnl
4769   case "${target}" in
4770     *-*-solaris2*)
4771       # Introduced in Solaris 11.2.
4772       if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
4773         gcc_cv_ld_compress_debug=3
4774         gcc_cv_ld_compress_debug_option="-z compress-sections"
4775       else
4776         gcc_cv_ld_compress_debug=0
4777       fi
4778       ;;
4779     *)
4780       # Assume linkers other than GNU ld don't support compessed debug
4781       # sections.
4782       gcc_cv_ld_compress_debug=0
4783       ;;
4784   esac
4785 changequote([,])dnl
4786 fi
4787 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
4788 [Define to the level of your linker's compressed debug section support.])
4789 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
4790 [Define to the linker option to enable compressed debug sections.])
4791 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
4792
4793 # --------
4794 # UNSORTED
4795 # --------
4796
4797 AC_CACHE_CHECK(linker --as-needed support,
4798 gcc_cv_ld_as_needed,
4799 [gcc_cv_ld_as_needed=no
4800 gcc_cv_ld_as_needed_option='--as-needed'
4801 gcc_cv_ld_no_as_needed_option='--no-as-needed'
4802 if test $in_tree_ld = yes ; then
4803   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4804      && test $in_tree_ld_is_elf = yes; then
4805     gcc_cv_ld_as_needed=yes
4806   fi
4807 elif test x$gcc_cv_ld != x; then
4808         # Check if linker supports --as-needed and --no-as-needed options
4809         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
4810                 gcc_cv_ld_as_needed=yes
4811         else
4812           case "$target" in
4813             # Solaris 2 ld always supports -z ignore/-z record.
4814             *-*-solaris2*)
4815               gcc_cv_ld_as_needed=yes
4816               gcc_cv_ld_as_needed_option="-z ignore"
4817               gcc_cv_ld_no_as_needed_option="-z record"
4818               ;;
4819           esac
4820         fi
4821 fi
4822 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
4823 # dl_iterate_phdr, i.e. since Solaris 11.
4824 case "$target" in
4825   *-*-solaris2.1[[1-9]]*)
4826     case "$target" in
4827     i?86-*-* | x86_64-*-*)
4828       if echo "$ld_ver" | grep GNU > /dev/null; then
4829         # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
4830         gcc_cv_ld_as_needed=no
4831       fi
4832       ;;
4833     esac
4834     ;;
4835   *-*-solaris2*)
4836     gcc_cv_ld_as_needed=no
4837     ;;
4838 esac
4839 ])
4840 if test x"$gcc_cv_ld_as_needed" = xyes; then
4841         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
4842 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
4843         AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
4844 [Define to the linker option to ignore unused dependencies.])
4845         AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
4846 [Define to the linker option to keep unused dependencies.])
4847 fi
4848
4849 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
4850 saved_LDFLAGS="$LDFLAGS"
4851 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
4852   LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
4853   AC_LINK_IFELSE([int main(void) {return 0;}],
4854     [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
4855 done
4856 LDFLAGS="$saved_LDFLAGS"
4857 if test "x$gcc_cv_ld_clearcap" = xyes; then
4858   AC_DEFINE([HAVE_LD_CLEARCAP], 1,
4859 [Define if the linker supports clearing hardware capabilities via mapfile.])
4860   AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
4861 fi
4862 AC_MSG_RESULT($gcc_cv_ld_clearcap)
4863
4864 case "$target:$tm_file" in
4865   powerpc64-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
4866   case "$target" in
4867      *le-*-linux*)
4868      emul_name="-melf64lppc"
4869       ;;
4870      *-*-linux*)
4871      emul_name="-melf64ppc"
4872       ;;
4873      *-*-freebsd*)
4874      emul_name="-melf64ppc_fbsd"
4875       ;;
4876   esac
4877     AC_CACHE_CHECK(linker support for omitting dot symbols,
4878     gcc_cv_ld_no_dot_syms,
4879     [gcc_cv_ld_no_dot_syms=no
4880     if test x"$ld_is_gold" = xyes; then
4881       gcc_cv_ld_no_dot_syms=yes
4882     elif test $in_tree_ld = yes ; then
4883       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
4884         gcc_cv_ld_no_dot_syms=yes
4885       fi
4886     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4887       cat > conftest1.s <<EOF
4888         .text
4889         bl .foo
4890 EOF
4891       cat > conftest2.s <<EOF
4892         .section ".opd","aw"
4893         .align 3
4894         .globl foo
4895         .type foo,@function
4896 foo:
4897         .quad .LEfoo,.TOC.@tocbase,0
4898         .text
4899 .LEfoo:
4900         blr
4901         .size foo,.-.LEfoo
4902 EOF
4903       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
4904          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
4905          && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
4906         gcc_cv_ld_no_dot_syms=yes
4907       fi
4908       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
4909     fi
4910     ])
4911     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
4912       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
4913     [Define if your PowerPC64 linker only needs function descriptor syms.])
4914     fi
4915
4916     AC_CACHE_CHECK(linker large toc support,
4917     gcc_cv_ld_large_toc,
4918     [gcc_cv_ld_large_toc=no
4919     if test x"$ld_is_gold" = xyes; then
4920       gcc_cv_ld_large_toc=yes
4921     elif test $in_tree_ld = yes ; then
4922       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
4923         gcc_cv_ld_large_toc=yes
4924       fi
4925     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4926       cat > conftest.s <<EOF
4927         .section ".tbss","awT",@nobits
4928         .align 3
4929 ie0:    .space 8
4930         .global _start
4931         .text
4932 _start:
4933         addis 9,13,ie0@got@tprel@ha
4934         ld 9,ie0@got@tprel@l(9)
4935 EOF
4936       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
4937          && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
4938         gcc_cv_ld_large_toc=yes
4939       fi
4940       rm -f conftest conftest.o conftest.s
4941     fi
4942     ])
4943     if test x"$gcc_cv_ld_large_toc" = xyes; then
4944       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4945     [Define if your PowerPC64 linker supports a large TOC.])
4946     fi
4947     ;;
4948 esac
4949
4950 case "$target" in
4951   *-*-aix*)
4952     AC_CACHE_CHECK(linker large toc support,
4953     gcc_cv_ld_large_toc,
4954     [gcc_cv_ld_large_toc=no
4955     if test x$gcc_cv_as != x ; then
4956       cat > conftest.s <<EOF
4957         .toc
4958 LC..1:
4959         .tc a[[TC]],a[[RW]]
4960         .extern a[[RW]]
4961         .csect .text[[PR]]
4962 .largetoctest:
4963         addis 9,LC..1@u(2)
4964         ld 3,LC..1@l(9)
4965 EOF
4966       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
4967         gcc_cv_ld_large_toc=yes
4968       fi
4969       rm -f conftest conftest.o conftest.s
4970     fi
4971     ])
4972     if test x"$gcc_cv_ld_large_toc" = xyes; then
4973       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4974     [Define if your PowerPC64 linker supports a large TOC.])
4975     fi
4976     ;;
4977 esac
4978
4979 AC_CACHE_CHECK(linker --build-id support,
4980   gcc_cv_ld_buildid,
4981   [gcc_cv_ld_buildid=no
4982   if test $in_tree_ld = yes ; then
4983     if test "$gcc_cv_gld_major_version" -eq 2 -a \
4984        "$gcc_cv_gld_minor_version" -ge 18 -o \
4985        "$gcc_cv_gld_major_version" -gt 2 \
4986        && test $in_tree_ld_is_elf = yes; then
4987       gcc_cv_ld_buildid=yes
4988     fi
4989   elif test x$gcc_cv_ld != x; then
4990     if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
4991       gcc_cv_ld_buildid=yes
4992     fi
4993   fi])
4994 if test x"$gcc_cv_ld_buildid" = xyes; then
4995   AC_DEFINE(HAVE_LD_BUILDID, 1,
4996   [Define if your linker supports --build-id.])
4997 fi
4998
4999 AC_ARG_ENABLE(linker-build-id,
5000 [AS_HELP_STRING([--enable-linker-build-id],
5001                 [compiler will always pass --build-id to linker])],
5002 [],
5003 enable_linker_build_id=no)
5004
5005 if test x"$enable_linker_build_id" = xyes; then
5006   if test x"$gcc_cv_ld_buildid" = xyes; then
5007     AC_DEFINE(ENABLE_LD_BUILDID, 1,
5008     [Define if gcc should always pass --build-id to linker.])
5009   else
5010     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
5011   fi
5012 fi
5013
5014 # In binutils 2.21, GNU ld gained support for new emulations fully
5015 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
5016 AC_CACHE_CHECK(linker *_sol2 emulation support,
5017   gcc_cv_ld_sol2_emulation,
5018   [gcc_cv_ld_sol2_emulation=no
5019   if test $in_tree_ld = yes ; then
5020     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5021        "$gcc_cv_gld_minor_version" -ge 21 -o \
5022        "$gcc_cv_gld_major_version" -gt 2 \
5023        && test $in_tree_ld_is_elf = yes; then
5024       gcc_cv_ld_sol2_emulation=yes
5025     fi
5026   elif test x$gcc_cv_ld != x; then
5027     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
5028        grep _sol2 > /dev/null; then
5029       gcc_cv_ld_sol2_emulation=yes
5030     fi
5031   fi])
5032 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
5033   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
5034   [Define if your linker supports the *_sol2 emulations.])
5035 fi
5036
5037 AC_CACHE_CHECK(linker --sysroot support,
5038   gcc_cv_ld_sysroot,
5039   [gcc_cv_ld_sysroot=no
5040   if test $in_tree_ld = yes ; then
5041       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
5042         gcc_cv_ld_sysroot=yes
5043       fi
5044   elif test x$gcc_cv_ld != x; then
5045     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
5046       gcc_cv_ld_sysroot=yes
5047     fi
5048   fi])
5049 if test x"$gcc_cv_ld_sysroot" = xyes; then
5050   AC_DEFINE(HAVE_LD_SYSROOT, 1,
5051   [Define if your linker supports --sysroot.])
5052 fi
5053
5054 # Test for stack protector support in target C library.
5055 AC_CACHE_CHECK(__stack_chk_fail in target C library,
5056       gcc_cv_libc_provides_ssp,
5057       [gcc_cv_libc_provides_ssp=no
5058     case "$target" in
5059        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
5060       # glibc 2.4 and later provides __stack_chk_fail and
5061       # either __stack_chk_guard, or TLS access to stack guard canary.
5062       GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
5063       [if test -f $target_header_dir/features.h \
5064          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
5065             $target_header_dir/features.h > /dev/null; then
5066         if $EGREP '^[   ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
5067              $target_header_dir/features.h > /dev/null && \
5068              test -f $target_header_dir/bits/uClibc_config.h && \
5069              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
5070              $target_header_dir/bits/uClibc_config.h > /dev/null; then
5071           gcc_cv_libc_provides_ssp=yes
5072         fi
5073       # all versions of Bionic support stack protector
5074       elif test -f $target_header_dir/sys/cdefs.h \
5075         && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
5076            $target_header_dir/sys/cdefs.h > /dev/null; then
5077          gcc_cv_libc_provides_ssp=yes
5078       fi]])
5079         ;;
5080        *-*-gnu*)
5081          # Avoid complicated tests (see
5082          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
5083          # simply assert that glibc does provide this, which is true for all
5084          # realistically usable GNU/Hurd configurations.
5085          gcc_cv_libc_provides_ssp=yes;;
5086        *-*-darwin* | *-*-freebsd*)
5087          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
5088            [echo "no __stack_chk_fail on this target"])
5089         ;;
5090   *) gcc_cv_libc_provides_ssp=no ;;
5091     esac])
5092
5093 if test x$gcc_cv_libc_provides_ssp = xyes; then
5094   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
5095             [Define if your target C library provides stack protector support])
5096 fi
5097
5098 # Test for <sys/sdt.h> on the target.
5099 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
5100 AC_MSG_CHECKING(sys/sdt.h in the target C library)
5101 have_sys_sdt_h=no
5102 if test -f $target_header_dir/sys/sdt.h; then
5103   have_sys_sdt_h=yes
5104   AC_DEFINE(HAVE_SYS_SDT_H, 1,
5105             [Define if your target C library provides sys/sdt.h])
5106 fi
5107 AC_MSG_RESULT($have_sys_sdt_h)
5108
5109 # Check if TFmode long double should be used by default or not.
5110 # Some glibc targets used DFmode long double, but with glibc 2.4
5111 # and later they can use TFmode.
5112 case "$target" in
5113   powerpc*-*-linux* | \
5114   sparc*-*-linux* | \
5115   s390*-*-linux* | \
5116   alpha*-*-linux*)
5117     AC_ARG_WITH(long-double-128,
5118       [AS_HELP_STRING([--with-long-double-128],
5119                       [use 128-bit long double by default])],
5120       gcc_cv_target_ldbl128="$with_long_double_128",
5121       [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
5122       [gcc_cv_target_ldbl128=no
5123       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
5124         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
5125       && gcc_cv_target_ldbl128=yes
5126       ]])])
5127     ;;
5128 esac
5129 if test x$gcc_cv_target_ldbl128 = xyes; then
5130   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
5131             [Define if TFmode long double should be the default])
5132 fi
5133
5134 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
5135 gcc_cv_target_dl_iterate_phdr=unknown
5136 case "$target" in
5137   # Restrict to Solaris 11+.  While most of the Solaris 11 linker changes
5138   # were backported to Solaris 10 Update 10, dl_iterate_phdr only lives in
5139   # libdl there, both complicating its use and breaking compatibility
5140   # between Solaris 10 updates.
5141   *-*-solaris2.1[[1-9]]*)
5142     # <link.h> needs both a dl_iterate_phdr declaration and support for
5143     # compilation with largefile support.
5144     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
5145       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
5146       gcc_cv_target_dl_iterate_phdr=yes
5147     else
5148       gcc_cv_target_dl_iterate_phdr=no
5149     fi
5150     ;;
5151   *-*-dragonfly* | *-*-freebsd*)
5152     if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
5153       gcc_cv_target_dl_iterate_phdr=yes
5154     else
5155       gcc_cv_target_dl_iterate_phdr=no
5156     fi
5157     ;;
5158 esac
5159 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
5160 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
5161    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
5162 [Define if your target C library provides the `dl_iterate_phdr' function.])
5163 fi
5164 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
5165
5166 # We no longer support different GC mechanisms.  Emit an error if
5167 # the user configures with --with-gc.
5168 AC_ARG_WITH(gc,
5169 [AS_HELP_STRING([--with-gc={page,zone}],
5170                 [this option is not supported anymore.  It used to choose
5171                  the garbage collection mechanism to use with the compiler])],
5172 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
5173 [])
5174
5175 # Libraries to use on the host.  This will normally be set by the top
5176 # level Makefile.  Here we simply capture the value for our Makefile.
5177 if test -z "${HOST_LIBS+set}"; then
5178   HOST_LIBS=
5179 fi
5180 AC_SUBST(HOST_LIBS)
5181
5182 # Use the system's zlib library.
5183 zlibdir=-L../zlib
5184 zlibinc="-I\$(srcdir)/../zlib"
5185 AC_ARG_WITH(system-zlib,
5186 [AS_HELP_STRING([--with-system-zlib], [use installed libz])],
5187 zlibdir=
5188 zlibinc=
5189 )
5190 AC_SUBST(zlibdir)
5191 AC_SUBST(zlibinc)
5192
5193 dnl Very limited version of automake's enable-maintainer-mode
5194
5195 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
5196   dnl maintainer-mode is disabled by default
5197   AC_ARG_ENABLE(maintainer-mode,
5198 [AS_HELP_STRING([--enable-maintainer-mode],
5199                 [enable make rules and dependencies not useful
5200                  (and sometimes confusing) to the casual installer])],
5201       maintainer_mode=$enableval,
5202       maintainer_mode=no)
5203
5204 AC_MSG_RESULT($maintainer_mode)
5205
5206 if test "$maintainer_mode" = "yes"; then
5207   MAINT=''
5208 else
5209   MAINT='#'
5210 fi
5211 AC_SUBST(MAINT)dnl
5212
5213 dnl Whether to prevent multiple front-ends from linking at the same time
5214
5215 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
5216   AC_ARG_ENABLE(link-mutex,
5217 [AS_HELP_STRING([--enable-link-mutex],
5218                 [avoid linking multiple front-ends at once to avoid thrashing
5219                  on the build machine])],
5220       do_link_mutex=$enableval,
5221       do_link_mutex=no)
5222 AC_MSG_RESULT($do_link_mutex)
5223
5224 if test "$do_link_mutex" = "yes"; then
5225    DO_LINK_MUTEX=true
5226 else
5227    DO_LINK_MUTEX=false
5228 fi
5229 AC_SUBST(DO_LINK_MUTEX)
5230
5231 # --------------
5232 # Language hooks
5233 # --------------
5234
5235 # Make empty files to contain the specs and options for each language.
5236 # Then add #include lines to for a compiler that has specs and/or options.
5237
5238 subdirs=
5239 lang_opt_files=
5240 lang_specs_files=
5241 lang_tree_files=
5242 # These (without "all_") are set in each config-lang.in.
5243 # `language' must be a single word so is spelled singularly.
5244 all_languages=
5245 all_compilers=
5246 all_outputs='Makefile'
5247 # List of language makefile fragments.
5248 all_lang_makefrags=
5249 # Additional files for gengtype
5250 all_gtfiles="$target_gtfiles"
5251
5252 # These are the languages that are set in --enable-languages,
5253 # and are available in the GCC tree.
5254 all_selected_languages=
5255
5256 # Add the language fragments.
5257 # Languages are added via two mechanisms.  Some information must be
5258 # recorded in makefile variables, these are defined in config-lang.in.
5259 # We accumulate them and plug them into the main Makefile.
5260 # The other mechanism is a set of hooks for each of the main targets
5261 # like `clean', `install', etc.
5262
5263 language_hooks="Make-hooks"
5264
5265 for lang in ${srcdir}/*/config-lang.in
5266 do
5267 changequote(,)dnl
5268         test "$lang" = "${srcdir}/*/config-lang.in" && continue
5269
5270         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
5271         if test "x$lang_alias" = x
5272         then
5273               echo "$lang doesn't set \$language." 1>&2
5274               exit 1
5275         fi
5276         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
5277         subdirs="$subdirs $subdir"
5278
5279         # $gcc_subdir is where the gcc integration files are to be found
5280         # for a language, both for internal compiler purposes (compiler
5281         # sources implementing front-end to GCC tree converters), and for
5282         # build infrastructure purposes (Make-lang.in, etc.)
5283         #
5284         # This will be <subdir> (relative to $srcdir) if a line like
5285         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
5286         # is found in <langdir>/config-lang.in, and will remain <langdir>
5287         # otherwise.
5288         #
5289         # Except for the language alias (fetched above), the regular
5290         # "config-lang.in" contents are always retrieved from $gcc_subdir,
5291         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
5292         # only this and the language alias.
5293
5294         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
5295         if [ "$gcc_subdir" = "" ]; then
5296            gcc_subdir="$subdir"
5297         fi
5298
5299         case ",$enable_languages," in
5300         *,$lang_alias,*)
5301             all_selected_languages="$all_selected_languages $lang_alias"
5302             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
5303                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
5304             fi
5305             ;;
5306         esac
5307 changequote([,])dnl
5308
5309         language=
5310         boot_language=
5311         compilers=
5312         outputs=
5313         gtfiles=
5314         subdir_requires=
5315         . ${srcdir}/$gcc_subdir/config-lang.in
5316         if test "x$language" = x
5317         then
5318                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
5319                 exit 1
5320         fi
5321
5322         ok=:
5323         case ",$enable_languages," in
5324                 *,$lang_alias,*) ;;
5325                 *)
5326                         for i in $subdir_requires; do
5327                                 test -f "${srcdir}/$i/config-lang.in" && continue
5328                                 ok=false
5329                                 break
5330                         done
5331                 ;;
5332         esac
5333         $ok || continue
5334
5335         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
5336         if test -f $srcdir/$gcc_subdir/lang.opt; then
5337             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
5338             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
5339         fi
5340         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
5341             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
5342         fi
5343         all_languages="$all_languages $language"
5344         all_compilers="$all_compilers $compilers"
5345         all_outputs="$all_outputs $outputs"
5346         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
5347         case ",$enable_languages," in
5348                 *,lto,*)
5349                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
5350                     enable_lto=yes
5351                     AC_SUBST(enable_lto)
5352                     ;;
5353                 *) ;;
5354         esac
5355 done
5356
5357 check_languages=
5358 for language in $all_selected_languages
5359 do
5360         check_languages="$check_languages check-$language"
5361 done
5362
5363 # We link each language in with a set of hooks, reached indirectly via
5364 # lang.${target}.  Only do so for selected languages.
5365
5366 rm -f Make-hooks
5367 touch Make-hooks
5368 target_list="all.cross start.encap rest.encap tags \
5369         install-common install-man install-info install-pdf install-html dvi \
5370         pdf html uninstall info man srcextra srcman srcinfo \
5371         mostlyclean clean distclean maintainer-clean install-plugin"
5372
5373 for t in $target_list
5374 do
5375         x=
5376         for lang in $all_selected_languages
5377         do
5378                 x="$x $lang.$t"
5379         done
5380         echo "lang.$t: $x" >> Make-hooks
5381 done
5382
5383 # --------
5384 # Option include files
5385 # --------
5386
5387 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
5388 option_includes="option-includes.mk"
5389 AC_SUBST_FILE(option_includes)
5390
5391 # --------
5392 # UNSORTED
5393 # --------
5394
5395 # Create .gdbinit.
5396
5397 echo "dir ." > .gdbinit
5398 echo "dir ${srcdir}" >> .gdbinit
5399 if test x$gdb_needs_out_file_path = xyes
5400 then
5401         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
5402 fi
5403 if test "x$subdirs" != x; then
5404         for s in $subdirs
5405         do
5406                 echo "dir ${srcdir}/$s" >> .gdbinit
5407         done
5408 fi
5409 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
5410 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
5411
5412 # Put a breakpoint on __asan_report_error to help with debugging buffer
5413 # overflow.
5414 case "$CFLAGS" in
5415 *-fsanitize=address*)
5416   echo "source ${srcdir}/gdbasan.in" >> .gdbinit
5417   ;;
5418 esac
5419
5420 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
5421 AC_SUBST(gcc_tooldir)
5422 AC_SUBST(dollar)
5423
5424 # Find a directory in which to install a shared libgcc.
5425
5426 AC_ARG_ENABLE(version-specific-runtime-libs,
5427 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
5428                 [specify that runtime libraries should be
5429                  installed in a compiler-specific directory])])
5430
5431 # Substitute configuration variables
5432 AC_SUBST(subdirs)
5433 AC_SUBST(srcdir)
5434 AC_SUBST(all_compilers)
5435 AC_SUBST(all_gtfiles)
5436 AC_SUBST(all_lang_makefrags)
5437 AC_SUBST(all_languages)
5438 AC_SUBST(all_selected_languages)
5439 AC_SUBST(build_exeext)
5440 AC_SUBST(build_install_headers_dir)
5441 AC_SUBST(build_xm_file_list)
5442 AC_SUBST(build_xm_include_list)
5443 AC_SUBST(build_xm_defines)
5444 AC_SUBST(build_file_translate)
5445 AC_SUBST(check_languages)
5446 AC_SUBST(cpp_install_dir)
5447 AC_SUBST(xmake_file)
5448 AC_SUBST(tmake_file)
5449 AC_SUBST(TM_ENDIAN_CONFIG)
5450 AC_SUBST(TM_MULTILIB_CONFIG)
5451 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
5452 AC_SUBST(extra_gcc_objs)
5453 AC_SUBST(user_headers_inc_next_pre)
5454 AC_SUBST(user_headers_inc_next_post)
5455 AC_SUBST(extra_headers_list)
5456 AC_SUBST(extra_objs)
5457 AC_SUBST(extra_programs)
5458 AC_SUBST(float_h_file)
5459 AC_SUBST(gcc_config_arguments)
5460 AC_SUBST(gcc_gxx_include_dir)
5461 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
5462 AC_SUBST(host_exeext)
5463 AC_SUBST(host_xm_file_list)
5464 AC_SUBST(host_xm_include_list)
5465 AC_SUBST(host_xm_defines)
5466 AC_SUBST(out_host_hook_obj)
5467 AC_SUBST(install)
5468 AC_SUBST(lang_opt_files)
5469 AC_SUBST(lang_specs_files)
5470 AC_SUBST(lang_tree_files)
5471 AC_SUBST(local_prefix)
5472 AC_SUBST(md_file)
5473 AC_SUBST(objc_boehm_gc)
5474 AC_SUBST(out_file)
5475 AC_SUBST(out_object_file)
5476 AC_SUBST(common_out_file)
5477 AC_SUBST(common_out_object_file)
5478 AC_SUBST(tm_file_list)
5479 AC_SUBST(tm_include_list)
5480 AC_SUBST(tm_defines)
5481 AC_SUBST(tm_p_file_list)
5482 AC_SUBST(tm_p_include_list)
5483 AC_SUBST(xm_file_list)
5484 AC_SUBST(xm_include_list)
5485 AC_SUBST(xm_defines)
5486 AC_SUBST(use_gcc_stdint)
5487 AC_SUBST(c_target_objs)
5488 AC_SUBST(cxx_target_objs)
5489 AC_SUBST(fortran_target_objs)
5490 AC_SUBST(target_cpu_default)
5491
5492 AC_SUBST_FILE(language_hooks)
5493
5494 # Echo link setup.
5495 if test x${build} = x${host} ; then
5496   if test x${host} = x${target} ; then
5497     echo "Links are now set up to build a native compiler for ${target}." 1>&2
5498   else
5499     echo "Links are now set up to build a cross-compiler" 1>&2
5500     echo " from ${host} to ${target}." 1>&2
5501   fi
5502 else
5503   if test x${host} = x${target} ; then
5504     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
5505     echo " for ${target}." 1>&2
5506   else
5507     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
5508     echo " from ${host} to ${target}." 1>&2
5509   fi
5510 fi
5511
5512 AC_ARG_VAR(GMPLIBS,[How to link GMP])
5513 AC_ARG_VAR(GMPINC,[How to find GMP include files])
5514
5515 AC_ARG_VAR(ISLLIBS,[How to link ISL])
5516 AC_ARG_VAR(ISLINC,[How to find ISL include files])
5517
5518 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
5519 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
5520 if test "x${CLOOGLIBS}" != "x" ; then
5521    AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
5522 fi
5523
5524 # Check for plugin support
5525 AC_ARG_ENABLE(plugin,
5526 [AS_HELP_STRING([--enable-plugin], [enable plugin support])],
5527 enable_plugin=$enableval,
5528 enable_plugin=yes; default_plugin=yes)
5529
5530 pluginlibs=
5531
5532 case "${host}" in
5533   *-*-darwin*)
5534     if test x$build = x$host; then
5535       export_sym_check="nm${exeext} -g"
5536     elif test x$host = x$target; then
5537       export_sym_check="$gcc_cv_nm -g"
5538     else
5539       export_sym_check=
5540     fi
5541   ;;
5542   *)
5543     if test x$build = x$host; then
5544       export_sym_check="objdump${exeext} -T"
5545     elif test x$host = x$target; then
5546       export_sym_check="$gcc_cv_objdump -T"
5547     else
5548       export_sym_check=
5549     fi
5550   ;;
5551 esac
5552
5553 if test x"$enable_plugin" = x"yes"; then
5554
5555   AC_MSG_CHECKING([for exported symbols])
5556   if test "x$export_sym_check" != x; then
5557     echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
5558     ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest$ac_exeext > /dev/null 2>&1
5559     if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
5560       : # No need to use a flag
5561       AC_MSG_RESULT([yes])
5562     else
5563       AC_MSG_RESULT([yes])
5564       AC_MSG_CHECKING([for -rdynamic])
5565       ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest$ac_exeext > /dev/null 2>&1
5566       if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
5567         plugin_rdynamic=yes
5568         pluginlibs="-rdynamic"
5569       else
5570         plugin_rdynamic=no
5571         enable_plugin=no
5572       fi
5573       AC_MSG_RESULT([$plugin_rdynamic])
5574     fi
5575   else
5576     AC_MSG_RESULT([unable to check])
5577   fi
5578
5579   # Check -ldl
5580   saved_LIBS="$LIBS"
5581   AC_SEARCH_LIBS([dlopen], [dl])
5582   if test x"$ac_cv_search_dlopen" = x"-ldl"; then
5583     pluginlibs="$pluginlibs -ldl"
5584   fi
5585   LIBS="$saved_LIBS"
5586
5587   # Check that we can build shared objects with -fPIC -shared
5588   saved_LDFLAGS="$LDFLAGS"
5589   saved_CFLAGS="$CFLAGS"
5590   case "${host}" in
5591     *-*-darwin*)
5592       CFLAGS=`echo $CFLAGS | sed s/-mdynamic-no-pic//g`
5593       CFLAGS="$CFLAGS -fPIC"
5594       LDFLAGS="$LDFLAGS -shared -undefined dynamic_lookup"
5595     ;;
5596     *)
5597       CFLAGS="$CFLAGS -fPIC"
5598       LDFLAGS="$LDFLAGS -fPIC -shared"
5599     ;;
5600   esac
5601   AC_MSG_CHECKING([for -fPIC -shared])
5602   AC_TRY_LINK(
5603     [extern int X;],[return X == 0;],
5604     [AC_MSG_RESULT([yes]); have_pic_shared=yes],
5605     [AC_MSG_RESULT([no]); have_pic_shared=no])
5606   if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
5607     pluginlibs=
5608     enable_plugin=no
5609   fi
5610   LDFLAGS="$saved_LDFLAGS"
5611   CFLAGS="$saved_CFLAGS"
5612
5613   # If plugin support had been requested but not available, fail.
5614   if test x"$enable_plugin" = x"no" ; then
5615     if test x"$default_plugin" != x"yes"; then
5616       AC_MSG_ERROR([
5617 Building GCC with plugin support requires a host that supports
5618 -fPIC, -shared, -ldl and -rdynamic.])
5619     fi
5620   fi
5621 fi
5622
5623 AC_SUBST(pluginlibs)
5624 AC_SUBST(enable_plugin)
5625 if test x"$enable_plugin" = x"yes"; then
5626   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
5627 fi
5628
5629
5630 # Enable --enable-host-shared
5631 AC_ARG_ENABLE(host-shared,
5632 [AS_HELP_STRING([--enable-host-shared],
5633                 [build host code as shared libraries])],
5634 [PICFLAG=-fPIC], [PICFLAG=])
5635 AC_SUBST(enable_host_shared)
5636 AC_SUBST(PICFLAG)
5637
5638
5639 AC_ARG_ENABLE(libquadmath-support,
5640 [AS_HELP_STRING([--disable-libquadmath-support],
5641   [disable libquadmath support for Fortran])],
5642 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
5643 ENABLE_LIBQUADMATH_SUPPORT=yes)
5644 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
5645   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
5646             [Define to 1 to enable libquadmath support])
5647 fi
5648
5649
5650 # Specify what hash style to use by default.
5651 AC_ARG_WITH([linker-hash-style],
5652 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
5653                 [specify the linker hash style])],
5654 [case x"$withval" in
5655    xsysv)
5656      LINKER_HASH_STYLE=sysv
5657      ;;
5658    xgnu)
5659      LINKER_HASH_STYLE=gnu
5660      ;;
5661    xboth)
5662      LINKER_HASH_STYLE=both
5663      ;;
5664    *)
5665      AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
5666      ;;
5667  esac],
5668 [LINKER_HASH_STYLE=''])
5669 if test x"${LINKER_HASH_STYLE}" != x; then
5670   AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
5671                                          [The linker hash style])
5672 fi
5673
5674 # Configure the subdirectories
5675 # AC_CONFIG_SUBDIRS($subdirs)
5676
5677 # Create the Makefile
5678 # and configure language subdirectories
5679 AC_CONFIG_FILES($all_outputs)
5680
5681 AC_CONFIG_COMMANDS([default],
5682 [
5683 case ${CONFIG_HEADERS} in
5684   *auto-host.h:config.in*)
5685   echo > cstamp-h ;;
5686 esac
5687 # Make sure all the subdirs exist.
5688 for d in $subdirs doc build common c-family
5689 do
5690     test -d $d || mkdir $d
5691 done
5692 ],
5693 [subdirs='$subdirs'])
5694 AC_OUTPUT
5695