gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   5 # 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
   6
   7 #This file is part of GCC.
   8
   9 #GCC is free software; you can redistribute it and/or modify it under
  10 #the terms of the GNU General Public License as published by the Free
  11 #Software Foundation; either version 3, or (at your option) any later
  12 #version.
  13
  14 #GCC is distributed in the hope that it will be useful, but WITHOUT
  15 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 #for more details.
  18
  19 #You should have received a copy of the GNU General Public License
  20 #along with GCC; see the file COPYING3.  If not see
  21 #<http://www.gnu.org/licenses/>.
  22
  23 # --------------------------------
  24 # Initialization and sanity checks
  25 # --------------------------------
  26
  27 AC_PREREQ(2.64)
  28 AC_INIT
  29 AC_CONFIG_SRCDIR(tree.c)
  30 AC_CONFIG_HEADER(auto-host.h:config.in)
  31
  32 gcc_version=`cat $srcdir/BASE-VER`
  33
  34 # Determine the host, build, and target systems
  35 AC_CANONICAL_BUILD
  36 AC_CANONICAL_HOST
  37 AC_CANONICAL_TARGET
  38
  39 # Determine the noncanonical target name, for directory use.
  40 ACX_NONCANONICAL_TARGET
  41
  42 # Determine the target- and build-specific subdirectories
  43 GCC_TOPLEV_SUBDIRS
  44
  45 # Set program_transform_name
  46 AC_ARG_PROGRAM
  47
  48 # Check for bogus environment variables.
  49 # Test if LIBRARY_PATH contains the notation for the current directory
  50 # since this would lead to problems installing/building glibc.
  51 # LIBRARY_PATH contains the current directory if one of the following
  52 # is true:
  53 # - one of the terminals (":" and ";") is the first or last sign
  54 # - two terminals occur directly after each other
  55 # - the path contains an element with a dot in it
  56 AC_MSG_CHECKING(LIBRARY_PATH variable)
  57 changequote(,)dnl
  58 case ${LIBRARY_PATH} in
  59   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  60     library_path_setting="contains current directory"
  61     ;;
  62   *)
  63     library_path_setting="ok"
  64     ;;
  65 esac
  66 changequote([,])dnl
  67 AC_MSG_RESULT($library_path_setting)
  68 if test "$library_path_setting" != "ok"; then
  69 AC_MSG_ERROR([
  70 *** LIBRARY_PATH shouldn't contain the current directory when
  71 *** building gcc. Please change the environment variable
  72 *** and run configure again.])
  73 fi
  74
  75 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  76 # since this would lead to problems installing/building glibc.
  77 # GCC_EXEC_PREFIX contains the current directory if one of the following
  78 # is true:
  79 # - one of the terminals (":" and ";") is the first or last sign
  80 # - two terminals occur directly after each other
  81 # - the path contains an element with a dot in it
  82 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  83 changequote(,)dnl
  84 case ${GCC_EXEC_PREFIX} in
  85   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  86     gcc_exec_prefix_setting="contains current directory"
  87     ;;
  88   *)
  89     gcc_exec_prefix_setting="ok"
  90     ;;
  91 esac
  92 changequote([,])dnl
  93 AC_MSG_RESULT($gcc_exec_prefix_setting)
  94 if test "$gcc_exec_prefix_setting" != "ok"; then
  95 AC_MSG_ERROR([
  96 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
  97 *** building gcc. Please change the environment variable
  98 *** and run configure again.])
  99 fi
 100
 101 # -----------
 102 # Directories
 103 # -----------
 104
 105 # Specify the local prefix
 106 local_prefix=
 107 AC_ARG_WITH(local-prefix,
 108 [AS_HELP_STRING([--with-local-prefix=DIR],
 109                 [specifies directory to put local include])],
 110 [case "${withval}" in
 111 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 112 no)     ;;
 113 *)      local_prefix=$with_local_prefix ;;
 114 esac])
 115
 116 # Default local prefix if it is empty
 117 if test x$local_prefix = x; then
 118         local_prefix=/usr/local
 119 fi
 120
 121 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 122 # passed in by the toplevel make and thus we'd get different behavior
 123 # depending on where we built the sources.
 124 gcc_gxx_include_dir=
 125 # Specify the g++ header file directory
 126 AC_ARG_WITH(gxx-include-dir,
 127 [AS_HELP_STRING([--with-gxx-include-dir=DIR],
 128                 [specifies directory to put g++ header files])],
 129 [case "${withval}" in
 130 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 131 no)     ;;
 132 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 133 esac])
 134
 135 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 136 if test x${gcc_gxx_include_dir} = x; then
 137   if test x${enable_version_specific_runtime_libs} = xyes; then
 138     gcc_gxx_include_dir='${libsubdir}/include/c++'
 139   else
 140     libstdcxx_incdir='include/c++/$(version)'
 141     if test x$host != x$target; then
 142        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 143     fi
 144     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 145   fi
 146 fi
 147
 148 gcc_gxx_include_dir_add_sysroot=0
 149 if test "${with_sysroot+set}" = set; then
 150   gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 151   if test "${gcc_gxx_without_sysroot}"; then
 152     gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
 153     gcc_gxx_include_dir_add_sysroot=1
 154   fi
 155 fi
 156
 157 AC_ARG_WITH(cpp_install_dir,
 158 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
 159                 [install the user visible C preprocessor in DIR
 160                  (relative to PREFIX) as well as PREFIX/bin])],
 161 [if test x$withval = xyes; then
 162   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 163 elif test x$withval != xno; then
 164   cpp_install_dir=$withval
 165 fi])
 166
 167 # We would like to our source tree to be readonly.  However when releases or
 168 # pre-releases are generated, the flex/bison generated files as well as the
 169 # various formats of manuals need to be included along with the rest of the
 170 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 171 # just that.
 172
 173 AC_MSG_CHECKING([whether to place generated files in the source directory])
 174   dnl generated-files-in-srcdir is disabled by default
 175   AC_ARG_ENABLE(generated-files-in-srcdir,
 176     [AS_HELP_STRING([--enable-generated-files-in-srcdir],
 177                     [put copies of generated files in source dir
 178                      intended for creating source tarballs for users
 179                      without texinfo bison or flex])],
 180       generated_files_in_srcdir=$enableval,
 181       generated_files_in_srcdir=no)
 182
 183 AC_MSG_RESULT($generated_files_in_srcdir)
 184
 185 if test "$generated_files_in_srcdir" = "yes"; then
 186   GENINSRC=''
 187 else
 188   GENINSRC='#'
 189 fi
 190 AC_SUBST(GENINSRC)
 191
 192 # -------------------
 193 # Find default linker
 194 # -------------------
 195
 196 # With GNU ld
 197 AC_ARG_WITH(gnu-ld,
 198 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
 199 gnu_ld_flag="$with_gnu_ld",
 200 gnu_ld_flag=no)
 201
 202 # With pre-defined ld
 203 AC_ARG_WITH(ld,
 204 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
 205 DEFAULT_LINKER="$with_ld")
 206 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 207   if test ! -x "$DEFAULT_LINKER"; then
 208     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 209   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 210     gnu_ld_flag=yes
 211   fi
 212   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 213         [Define to enable the use of a default linker.])
 214 fi
 215
 216 gnu_ld=`if test x"$gnu_ld_flag" = x"yes"; then echo 1; else echo 0; fi`
 217 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld, [Define if using GNU ld.])
 218
 219 AC_MSG_CHECKING([whether a default linker was specified])
 220 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 221   if test x"$gnu_ld_flag" = x"no"; then
 222     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 223   else
 224     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 225   fi
 226 else
 227   AC_MSG_RESULT(no)
 228 fi
 229
 230 # With demangler in GNU ld
 231 AC_ARG_WITH(demangler-in-ld,
 232 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
 233 demangler_in_ld="$with_demangler_in_ld",
 234 demangler_in_ld=yes)
 235
 236 # ----------------------
 237 # Find default assembler
 238 # ----------------------
 239
 240 # With GNU as
 241 AC_ARG_WITH(gnu-as,
 242 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
 243 gas_flag="$with_gnu_as",
 244 gas_flag=no)
 245
 246 AC_ARG_WITH(as,
 247 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
 248 DEFAULT_ASSEMBLER="$with_as")
 249 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 250   if test ! -x "$DEFAULT_ASSEMBLER"; then
 251     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 252   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 253     gas_flag=yes
 254   fi
 255   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 256         [Define to enable the use of a default assembler.])
 257 fi
 258
 259 gnu_as=`if test x"$gas_flag" = x"yes"; then echo 1; else echo 0; fi`
 260 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as, [Define if using GNU as.])
 261
 262 AC_MSG_CHECKING([whether a default assembler was specified])
 263 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 264   if test x"$gas_flag" = x"no"; then
 265     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 266   else
 267     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 268   fi
 269 else
 270   AC_MSG_RESULT(no)
 271 fi
 272
 273 # ---------------
 274 # Find C compiler
 275 # ---------------
 276
 277 # If a non-executable a.out is present (e.g. created by GNU as above even if
 278 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 279 # file, even when creating an executable, so an execution test fails.
 280 # Remove possible default executable files to avoid this.
 281 #
 282 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 283 # Autoconf includes it.
 284 rm -f a.out a.exe b.out
 285
 286 # Find the native compiler
 287 AC_PROG_CC
 288 AM_PROG_CC_C_O
 289 AC_PROG_CXX
 290 ACX_PROG_GNAT([-I"$srcdir"/ada])
 291
 292 # autoconf is lame and doesn't give us any substitution variable for this.
 293 if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
 294   NO_MINUS_C_MINUS_O=yes
 295 else
 296   OUTPUT_OPTION='-o $@'
 297 fi
 298 AC_SUBST(NO_MINUS_C_MINUS_O)
 299 AC_SUBST(OUTPUT_OPTION)
 300
 301 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 302 # optimizations to be activated explicitly by the toplevel.
 303 case "$CC" in
 304   */prev-gcc/xgcc*) ;;
 305   *) CFLAGS=`echo $CFLAGS | sed "s/-O[[s0-9]]* *//" ` ;;
 306 esac
 307 AC_SUBST(CFLAGS)
 308
 309 # Determine PICFLAG for target gnatlib.
 310 GCC_PICFLAG_FOR_TARGET
 311 AC_SUBST(PICFLAG_FOR_TARGET)
 312
 313 # -------------------------
 314 # Check C compiler features
 315 # -------------------------
 316
 317 AC_USE_SYSTEM_EXTENSIONS
 318 AC_PROG_CPP
 319 AC_C_INLINE
 320
 321 AC_SYS_LARGEFILE
 322
 323 # sizeof(char) is 1 by definition.
 324 AC_CHECK_SIZEOF(void *)
 325 AC_CHECK_SIZEOF(short)
 326 AC_CHECK_SIZEOF(int)
 327 AC_CHECK_SIZEOF(long)
 328 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 329 AC_CHECK_TYPES([__int64], [AC_CHECK_SIZEOF(__int64)])
 330 GCC_STDINT_TYPES
 331
 332 # ---------------------
 333 # Warnings and checking
 334 # ---------------------
 335
 336 # Check $CC warning features (if it's GCC).
 337 # We want to use -pedantic, but we don't want warnings about
 338 # * 'long long'
 339 # * variadic macros
 340 # * overlong strings
 341 # * C++11 narrowing conversions in { }
 342 # So, we only use -pedantic if we can disable those warnings.
 343
 344 ACX_PROG_CC_WARNING_OPTS(
 345         m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual])), [loose_warn])
 346 ACX_PROG_CC_WARNING_OPTS(
 347         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 348         [c_loose_warn])
 349 ACX_PROG_CC_WARNING_OPTS(
 350         m4_quote(m4_do([-Wmissing-format-attribute])), [strict_warn])
 351 ACX_PROG_CC_WARNING_OPTS(
 352         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 353 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(
 354         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 355                        [-Wno-overlength-strings])), [strict_warn])
 356 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 357
 358 # The above macros do nothing if the compiler is not GCC.  However, the
 359 # Makefile has more goo to add other flags, so these variables are used
 360 # to enable warnings only for GCC.
 361 warn_cflags=
 362 warn_cxxflags=
 363 if test "x$GCC" = "xyes"; then
 364   warn_cflags='$(GCC_WARN_CFLAGS)'
 365   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 366 fi
 367 AC_SUBST(warn_cflags)
 368 AC_SUBST(warn_cxxflags)
 369
 370 # Disable exceptions and RTTI if building with g++
 371 ACX_PROG_CC_WARNING_OPTS(
 372         m4_quote(m4_do([-fno-exceptions -fno-rtti])), [noexception_flags])
 373
 374 # Enable expensive internal checks
 375 is_release=
 376 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 377   is_release=yes
 378 fi
 379
 380 AC_ARG_ENABLE(checking,
 381 [AS_HELP_STRING([[--enable-checking[=LIST]]],
 382                 [enable expensive run-time checks.  With LIST,
 383                  enable only specific categories of checks.
 384                  Categories are: yes,no,all,none,release.
 385                  Flags are: assert,df,fold,gc,gcac,gimple,misc,
 386                  rtlflag,rtl,runtime,tree,valgrind,types])],
 387 [ac_checking_flags="${enableval}"],[
 388 # Determine the default checks.
 389 if test x$is_release = x ; then
 390   ac_checking_flags=yes
 391 else
 392   ac_checking_flags=release
 393 fi])
 394 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 395 for check in release $ac_checking_flags
 396 do
 397         case $check in
 398         # these set all the flags to specific states
 399         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 400                         ac_fold_checking= ; ac_gc_checking=1 ;
 401                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 402                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 403                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 404                         ac_types_checking=1 ;;
 405         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 406                         ac_fold_checking= ; ac_gc_checking= ;
 407                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 408                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 409                         ac_tree_checking= ; ac_valgrind_checking= ;
 410                         ac_types_checking= ;;
 411         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 412                         ac_fold_checking=1 ; ac_gc_checking=1 ;
 413                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 414                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 415                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 416                         ac_types_checking=1 ;;
 417         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 418                         ac_fold_checking= ; ac_gc_checking= ;
 419                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 420                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 421                         ac_tree_checking= ; ac_valgrind_checking= ;
 422                         ac_types_checking= ;;
 423         # these enable particular checks
 424         assert)         ac_assert_checking=1 ;;
 425         df)             ac_df_checking=1 ;;
 426         fold)           ac_fold_checking=1 ;;
 427         gc)             ac_gc_checking=1 ;;
 428         gcac)           ac_gc_always_collect=1 ;;
 429         gimple)         ac_gimple_checking=1 ;;
 430         misc)           ac_checking=1 ;;
 431         rtl)            ac_rtl_checking=1 ;;
 432         rtlflag)        ac_rtlflag_checking=1 ;;
 433         runtime)        ac_runtime_checking=1 ;;
 434         tree)           ac_tree_checking=1 ;;
 435         types)          ac_types_checking=1 ;;
 436         valgrind)       ac_valgrind_checking=1 ;;
 437         *)      AC_MSG_ERROR(unknown check category $check) ;;
 438         esac
 439 done
 440 IFS="$ac_save_IFS"
 441
 442 nocommon_flag=""
 443 if test x$ac_checking != x ; then
 444   AC_DEFINE(ENABLE_CHECKING, 1,
 445 [Define if you want more run-time sanity checks.  This one gets a grab
 446    bag of miscellaneous but relatively cheap checks.])
 447   nocommon_flag=-fno-common
 448 fi
 449 AC_SUBST(nocommon_flag)
 450 if test x$ac_df_checking != x ; then
 451   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 452 [Define if you want more run-time sanity checks for dataflow.])
 453 fi
 454 if test x$ac_assert_checking != x ; then
 455   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 456 [Define if you want assertions enabled.  This is a cheap check.])
 457 fi
 458 if test x$ac_gimple_checking != x ; then
 459   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 460 [Define if you want operations on GIMPLE (the basic data structure of
 461 the high-level optimizers) to be checked for dynamic type safety at
 462 runtime.  This is moderately expensive.])
 463 fi
 464 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 465 if test x$ac_runtime_checking != x ; then
 466   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 467 [Define if you want runtime assertions enabled.  This is a cheap check.])
 468 fi
 469 if test x$ac_tree_checking != x ; then
 470   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 471 [Define if you want all operations on trees (the basic data
 472    structure of the front ends) to be checked for dynamic type safety
 473    at runtime.  This is moderately expensive.  The tree browser debugging
 474    routines will also be enabled by this option.
 475    ])
 476   TREEBROWSER=tree-browser.o
 477 fi
 478 if test x$ac_types_checking != x ; then
 479   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 480 [Define if you want all gimple types to be verified after gimplifiation.
 481    This is cheap.
 482    ])
 483 fi
 484 AC_SUBST(TREEBROWSER)
 485 if test x$ac_rtl_checking != x ; then
 486   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 487 [Define if you want all operations on RTL (the basic data structure
 488    of the optimizer and back end) to be checked for dynamic type safety
 489    at runtime.  This is quite expensive.])
 490 fi
 491 if test x$ac_rtlflag_checking != x ; then
 492   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 493 [Define if you want RTL flag accesses to be checked against the RTL
 494    codes that are supported for each access macro.  This is relatively
 495    cheap.])
 496 fi
 497 if test x$ac_gc_checking != x ; then
 498   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 499 [Define if you want the garbage collector to do object poisoning and
 500    other memory allocation checks.  This is quite expensive.])
 501 fi
 502 if test x$ac_gc_always_collect != x ; then
 503   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 504 [Define if you want the garbage collector to operate in maximally
 505    paranoid mode, validating the entire heap and collecting garbage at
 506    every opportunity.  This is extremely expensive.])
 507 fi
 508 if test x$ac_fold_checking != x ; then
 509   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 510 [Define if you want fold checked that it never destructs its argument.
 511    This is quite expensive.])
 512 fi
 513 valgrind_path_defines=
 514 valgrind_command=
 515
 516 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 517 dnl # an if statement.  This was the source of very frustrating bugs
 518 dnl # in converting to autoconf 2.5x!
 519 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 520
 521 if test x$ac_valgrind_checking != x ; then
 522   # It is certainly possible that there's valgrind but no valgrind.h.
 523   # GCC relies on making annotations so we must have both.
 524   AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 525   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 526     [[#include <valgrind/memcheck.h>
 527 #ifndef VALGRIND_DISCARD
 528 #error VALGRIND_DISCARD not defined
 529 #endif]])],
 530   [gcc_cv_header_valgrind_memcheck_h=yes],
 531   [gcc_cv_header_valgrind_memcheck_h=no])
 532   AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 533   AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 534   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 535     [[#include <memcheck.h>
 536 #ifndef VALGRIND_DISCARD
 537 #error VALGRIND_DISCARD not defined
 538 #endif]])],
 539   [gcc_cv_header_memcheck_h=yes],
 540   [gcc_cv_header_memcheck_h=no])
 541   AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 542   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 543         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 544   if test "x$valgrind_path" = "x" \
 545     || (test $have_valgrind_h = no \
 546         && test $gcc_cv_header_memcheck_h = no \
 547         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 548         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 549   fi
 550   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 551   valgrind_command="$valgrind_path -q"
 552   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 553 [Define if you want to run subprograms and generated programs
 554    through valgrind (a memory checker).  This is extremely expensive.])
 555   if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 556     AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 557         [Define if valgrind's valgrind/memcheck.h header is installed.])
 558   fi
 559   if test $gcc_cv_header_memcheck_h = yes; then
 560     AC_DEFINE(HAVE_MEMCHECK_H, 1,
 561         [Define if valgrind's memcheck.h header is installed.])
 562   fi
 563 fi
 564 AC_SUBST(valgrind_path_defines)
 565 AC_SUBST(valgrind_command)
 566
 567 # Enable code coverage collection
 568 AC_ARG_ENABLE(coverage,
 569 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
 570                 [enable compiler's code coverage collection.
 571                  Use to measure compiler performance and locate
 572                  unused parts of the compiler. With LEVEL, specify
 573                  optimization. Values are opt, noopt,
 574                  default is noopt])],
 575 [case "${enableval}" in
 576   yes|noopt)
 577     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
 578     ;;
 579   opt)
 580     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
 581     ;;
 582   no)
 583     # a.k.a. --disable-coverage
 584     coverage_flags=""
 585     ;;
 586   *)
 587     AC_MSG_ERROR(unknown coverage setting $enableval)
 588     ;;
 589 esac],
 590 [coverage_flags=""])
 591 AC_SUBST(coverage_flags)
 592
 593 AC_ARG_ENABLE(gather-detailed-mem-stats,
 594 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
 595                 [enable detailed memory allocation stats gathering])], [],
 596 [enable_gather_detailed_mem_stats=no])
 597 if test x$enable_gather_detailed_mem_stats = xyes ; then
 598   AC_DEFINE(GATHER_STATISTICS, 1,
 599         [Define to enable detailed memory allocation stats gathering.])
 600 fi
 601
 602 # -------------------------------
 603 # Miscenalleous configure options
 604 # -------------------------------
 605
 606 # See if we are building gcc with C++.
 607 AC_ARG_ENABLE(build-with-cxx,
 608 [AS_HELP_STRING([--enable-build-with-cxx],
 609                 [build with C++ compiler instead of C compiler])],
 610 ENABLE_BUILD_WITH_CXX=$enableval,
 611 ENABLE_BUILD_WITH_CXX=no)
 612 AC_SUBST(ENABLE_BUILD_WITH_CXX)
 613 if test "$ENABLE_BUILD_WITH_CXX" = "yes"; then
 614   AC_DEFINE(ENABLE_BUILD_WITH_CXX, 1,
 615             [Define if building with C++.])
 616 fi
 617
 618 # With stabs
 619 AC_ARG_WITH(stabs,
 620 [AS_HELP_STRING([--with-stabs],
 621                 [arrange to use stabs instead of host debug format])],
 622 stabs="$with_stabs",
 623 stabs=no)
 624
 625 # Determine whether or not multilibs are enabled.
 626 AC_ARG_ENABLE(multilib,
 627 [AS_HELP_STRING([--enable-multilib],
 628                 [enable library support for multiple ABIs])],
 629 [], [enable_multilib=yes])
 630 AC_SUBST(enable_multilib)
 631
 632 # Enable __cxa_atexit for C++.
 633 AC_ARG_ENABLE(__cxa_atexit,
 634 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
 635 [], [])
 636
 637 # Enable C extension for decimal float if target supports it.
 638 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 639
 640 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 641 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 642 [Define to 1 to enable decimal float extension to C.])
 643
 644 # Use default_decimal_float for dependency.
 645 enable_decimal_float=$default_decimal_float
 646
 647 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 648 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 649 [Define to 1 to specify that we are using the BID decimal floating
 650 point format instead of DPD])
 651
 652 # Enable C extension for fixed-point arithmetic.
 653 AC_ARG_ENABLE(fixed-point,
 654 [AS_HELP_STRING([--enable-fixed-point],
 655                 [enable fixed-point arithmetic extension to C])],
 656 [],
 657 [
 658   case $target in
 659     arm*)
 660       enable_fixed_point=yes
 661       ;;
 662
 663     mips*-*-*)
 664       case $host in
 665         mips*-sgi-irix*)
 666           AC_MSG_WARN([fixed-point is not supported on IRIX, ignored])
 667           enable_fixed_point=no
 668           ;;
 669         *)
 670           enable_fixed_point=yes
 671           ;;
 672       esac
 673       ;;
 674     *)
 675       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 676       enable_fixed_point=no
 677       ;;
 678   esac
 679 ])
 680 AC_SUBST(enable_fixed_point)
 681
 682 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 683 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 684 [Define to 1 to enable fixed-point arithmetic extension to C.])
 685
 686 # Enable threads
 687 # Pass with no value to take the default
 688 # Pass with a value to specify a thread package
 689 AC_ARG_ENABLE(threads,
 690 [AS_HELP_STRING([[--enable-threads[=LIB]]],
 691                 [enable thread usage for target GCC,
 692                  using LIB thread package])],,
 693 [enable_threads=''])
 694
 695 AC_ARG_ENABLE(tls,
 696 [AS_HELP_STRING([--enable-tls],
 697                 [enable or disable generation of tls code
 698                  overriding the assembler check for tls support])],
 699 [
 700   case $enable_tls in
 701     yes | no) ;;
 702     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 703 Valid choices are 'yes' and 'no'.]) ;;
 704   esac
 705 ], [enable_tls=''])
 706
 707 AC_ARG_ENABLE(objc-gc,
 708 [AS_HELP_STRING([--enable-objc-gc],
 709                 [enable the use of Boehm's garbage collector with
 710                  the GNU Objective-C runtime])],
 711 if test x$enable_objc_gc = xno; then
 712         objc_boehm_gc=''
 713 else
 714         objc_boehm_gc=1
 715 fi,
 716 objc_boehm_gc='')
 717
 718 AC_ARG_WITH(dwarf2,
 719 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
 720 dwarf2="$with_dwarf2",
 721 dwarf2=no)
 722
 723 AC_ARG_ENABLE(shared,
 724 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
 725 [
 726   case $enable_shared in
 727   yes | no) ;;
 728   *)
 729     enable_shared=no
 730     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 731     for pkg in $enableval; do
 732       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 733         enable_shared=yes
 734       fi
 735     done
 736     IFS="$ac_save_ifs"
 737     ;;
 738   esac
 739 ], [enable_shared=yes])
 740 AC_SUBST(enable_shared)
 741
 742 AC_ARG_WITH([native-system-header-dir],
 743   [  --with-native-system-header-dir=dir
 744                           use dir as the directory to look for standard
 745                           system header files in.  Defaults to /usr/include.],
 746 [
 747  case ${with_native_system_header_dir} in
 748  yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
 749  /* | [[A-Za-z]]:[[\\/]]*) ;;
 750  *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
 751  esac
 752  configured_native_system_header_dir="${withval}"
 753 ], [configured_native_system_header_dir=])
 754
 755 AC_ARG_WITH(build-sysroot,
 756   [AS_HELP_STRING([--with-build-sysroot=sysroot],
 757                   [use sysroot as the system root during the build])],
 758   [if test x"$withval" != x ; then
 759      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
 760    fi],
 761   [SYSROOT_CFLAGS_FOR_TARGET=])
 762 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
 763
 764 AC_ARG_WITH(sysroot,
 765 [AS_HELP_STRING([[--with-sysroot[=DIR]]],
 766                 [search for usr/lib, usr/include, et al, within DIR])],
 767 [
 768  case ${with_sysroot} in
 769  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 770  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 771  esac
 772
 773  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 774  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 775
 776  if test "x$prefix" = xNONE; then
 777   test_prefix=/usr/local
 778  else
 779   test_prefix=$prefix
 780  fi
 781  if test "x$exec_prefix" = xNONE; then
 782   test_exec_prefix=$test_prefix
 783  else
 784   test_exec_prefix=$exec_prefix
 785  fi
 786  case ${TARGET_SYSTEM_ROOT} in
 787  "${test_prefix}"|"${test_prefix}/"*|\
 788  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 789  '${prefix}'|'${prefix}/'*|\
 790  '${exec_prefix}'|'${exec_prefix}/'*)
 791    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 792    TARGET_SYSTEM_ROOT_DEFINE="$t"
 793    ;;
 794  esac
 795 ], [
 796  TARGET_SYSTEM_ROOT=
 797  TARGET_SYSTEM_ROOT_DEFINE=
 798  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 799 ])
 800 AC_SUBST(TARGET_SYSTEM_ROOT)
 801 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 802 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 803
 804 AC_ARG_WITH(specs,
 805   [AS_HELP_STRING([--with-specs=SPECS],
 806                   [add SPECS to driver command-line processing])],
 807   [CONFIGURE_SPECS=$withval],
 808   [CONFIGURE_SPECS=]
 809 )
 810 AC_SUBST(CONFIGURE_SPECS)
 811
 812 ACX_PKGVERSION([GCC])
 813 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
 814
 815 # Sanity check enable_languages in case someone does not run the toplevel
 816 # configure # script.
 817 AC_ARG_ENABLE(languages,
 818 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
 819 [case ,${enable_languages}, in
 820        ,,|,yes,)
 821                 # go safe -- we cannot be much sure without the toplevel
 822                 # configure's
 823                 # analysis of which target libs are present and usable
 824                 enable_languages=c
 825                 ;;
 826          *,all,*)
 827                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 828                 ;;
 829         *,c,*)
 830                 ;;
 831         *)
 832                 enable_languages=c,${enable_languages}
 833                 ;;
 834 esac],
 835 [enable_languages=c])
 836
 837 AC_ARG_WITH(multilib-list,
 838 [AS_HELP_STRING([--with-multilib-list], [select multilibs (SH and x86-64 only)])],
 839 :,
 840 with_multilib_list=default)
 841
 842 # -------------------------
 843 # Checks for other programs
 844 # -------------------------
 845
 846 AC_PROG_MAKE_SET
 847
 848 # Find some useful tools
 849 AC_PROG_AWK
 850 # We need awk to create options.c and options.h.
 851 # Bail out if it's missing.
 852 case ${AWK} in
 853   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
 854 esac
 855
 856 gcc_AC_PROG_LN_S
 857 ACX_PROG_LN($LN_S)
 858 AC_PROG_RANLIB
 859 ranlib_flags=""
 860 AC_SUBST(ranlib_flags)
 861
 862 gcc_AC_PROG_INSTALL
 863
 864 # See if cmp has --ignore-initial.
 865 gcc_AC_PROG_CMP_IGNORE_INITIAL
 866
 867 # See if we have the mktemp command.
 868 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
 869
 870 # See if makeinfo has been installed and is modern enough
 871 # that we can use it.
 872 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
 873   [GNU texinfo.* \([0-9][0-9.]*\)],
 874   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
 875 if test $gcc_cv_prog_makeinfo_modern = no; then
 876   AC_MSG_WARN([
 877 *** Makeinfo is missing or too old.
 878 *** Info documentation will not be built.])
 879   BUILD_INFO=
 880 else
 881   BUILD_INFO=info
 882 fi
 883 AC_SUBST(BUILD_INFO)
 884
 885 # Is pod2man recent enough to regenerate manpages?
 886 AC_MSG_CHECKING([for recent Pod::Man])
 887 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
 888   AC_MSG_RESULT(yes)
 889   GENERATED_MANPAGES=generated-manpages
 890 else
 891   AC_MSG_RESULT(no)
 892   GENERATED_MANPAGES=
 893 fi
 894 AC_SUBST(GENERATED_MANPAGES)
 895
 896 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
 897
 898 # How about lex?
 899 dnl Don't use AC_PROG_LEX; we insist on flex.
 900 dnl LEXLIB is not useful in gcc.
 901 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
 902
 903 # Bison?
 904 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
 905
 906 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
 907 # check for build == host before using them.
 908
 909 # NM
 910 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
 911   && test -d ../binutils ; then
 912   NM='${objdir}/../binutils/nm-new'
 913 else
 914   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
 915 fi
 916
 917 # AR
 918 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
 919   && test -d ../binutils ; then
 920   AR='${objdir}/../binutils/ar'
 921 else
 922   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
 923 fi
 924
 925
 926 # --------------------
 927 # Checks for C headers
 928 # --------------------
 929
 930 # Need to reject headers which give warnings, so that the -Werror bootstrap
 931 # works later. *sigh*  This needs to come before all header checks.
 932 AC_PROG_CPP_WERROR
 933
 934 AC_HEADER_STDC
 935 AC_HEADER_TIME
 936 ACX_HEADER_STRING
 937 AC_HEADER_SYS_WAIT
 938 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
 939                  fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
 940                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
 941                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
 942
 943 # Check for thread headers.
 944 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
 945 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
 946
 947 # These tests can't be done till we know if we have limits.h.
 948 gcc_AC_C_CHAR_BIT
 949 AC_C_BIGENDIAN
 950
 951 # ----------------------
 952 # Checks for C++ headers
 953 # ----------------------
 954
 955 dnl Autoconf will give an error in the configure script if there is no
 956 dnl C++ preprocessor.  Hack to prevent that.
 957 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
 958 AC_PROG_CXXCPP
 959 m4_popdef([AC_MSG_ERROR])[]dnl
 960
 961 AC_LANG_PUSH(C++)
 962
 963 AC_CHECK_HEADERS(unordered_map)
 964 AC_CHECK_HEADERS(tr1/unordered_map)
 965 AC_CHECK_HEADERS(ext/hash_map)
 966
 967 AC_LANG_POP(C++)
 968
 969 # --------
 970 # UNSORTED
 971 # --------
 972
 973
 974 # These libraries may be used by collect2.
 975 # We may need a special search path to get them linked.
 976 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
 977 [save_LIBS="$LIBS"
 978 for libs in '' -lld -lmld \
 979                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
 980                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
 981 do
 982         LIBS="$libs"
 983         AC_TRY_LINK_FUNC(ldopen,
 984                 [gcc_cv_collect2_libs="$libs"; break])
 985 done
 986 LIBS="$save_LIBS"
 987 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
 988 case $gcc_cv_collect2_libs in
 989         "none required")        ;;
 990         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
 991 esac
 992 AC_SUBST(COLLECT2_LIBS)
 993
 994 # When building Ada code on Alpha, we need exc_resume which is usually in
 995 # -lexc.  So test for it.
 996 save_LIBS="$LIBS"
 997 LIBS=
 998 AC_SEARCH_LIBS(exc_resume, exc)
 999 GNAT_LIBEXC="$LIBS"
1000 LIBS="$save_LIBS"
1001 AC_SUBST(GNAT_LIBEXC)
1002
1003 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1004 save_LIBS="$LIBS"
1005 LIBS=
1006 AC_SEARCH_LIBS(kstat_open, kstat)
1007 EXTRA_GCC_LIBS="$LIBS"
1008 LIBS="$save_LIBS"
1009 AC_SUBST(EXTRA_GCC_LIBS)
1010
1011 # Some systems put ldexp and frexp in libm instead of libc; assume
1012 # they're both in the same place.  jcf-dump needs them.
1013 save_LIBS="$LIBS"
1014 LIBS=
1015 AC_SEARCH_LIBS(ldexp, m)
1016 LDEXP_LIB="$LIBS"
1017 LIBS="$save_LIBS"
1018 AC_SUBST(LDEXP_LIB)
1019
1020 # Use <inttypes.h> only if it exists,
1021 # doesn't clash with <sys/types.h>, and declares intmax_t.
1022 AC_MSG_CHECKING(for inttypes.h)
1023 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1024 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1025 [[#include <sys/types.h>
1026 #include <inttypes.h>]],
1027   [[intmax_t i = -1;]])],
1028   [gcc_cv_header_inttypes_h=yes],
1029   [gcc_cv_header_inttypes_h=no])])
1030 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1031 if test $gcc_cv_header_inttypes_h = yes; then
1032   AC_DEFINE(HAVE_INTTYPES_H, 1,
1033         [Define if you have a working <inttypes.h> header file.])
1034 fi
1035
1036 dnl Disabled until we have a complete test for buggy enum bitfields.
1037 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1038
1039 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1040   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1041   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1042   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1043   putchar_unlocked putc_unlocked)
1044 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
1045         sysconf strsignal getrusage nl_langinfo \
1046         gettimeofday mbstowcs wcswidth mmap setlocale \
1047         gcc_UNLOCKED_FUNCS madvise)
1048
1049 if test x$ac_cv_func_mbstowcs = xyes; then
1050   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1051 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1052 int main()
1053 {
1054   mbstowcs(0, "", 0);
1055   return 0;
1056 }]])],
1057     [gcc_cv_func_mbstowcs_works=yes],
1058     [gcc_cv_func_mbstowcs_works=no],
1059     [gcc_cv_func_mbstowcs_works=yes])])
1060   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1061     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1062   [Define this macro if mbstowcs does not crash when its
1063    first argument is NULL.])
1064   fi
1065 fi
1066
1067 AC_CHECK_TYPE(ssize_t, int)
1068 AC_CHECK_TYPE(caddr_t, char *)
1069
1070 gcc_AC_FUNC_MMAP_BLACKLIST
1071
1072 case "${host}" in
1073 *-*-*vms*)
1074   # Under VMS, vfork works very differently than on Unix. The standard test
1075   # won't work, and it isn't easily adaptable. It makes more sense to
1076   # just force it.
1077   ac_cv_func_vfork_works=yes
1078   ;;
1079 esac
1080 AC_FUNC_FORK
1081
1082 # g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which exposes a different
1083 # iconv() prototype.
1084 AS_IF([test "$ENABLE_BUILD_WITH_CXX" = "yes"],
1085   [AC_LANG_PUSH([C++])
1086    AM_ICONV
1087    AC_LANG_POP([C++])],
1088   [AM_ICONV])
1089
1090 # Until we have in-tree GNU iconv:
1091 LIBICONV_DEP=
1092 AC_SUBST(LIBICONV_DEP)
1093
1094 AM_LC_MESSAGES
1095
1096 AM_LANGINFO_CODESET
1097
1098 # We will need to find libiberty.h and ansidecl.h
1099 saved_CFLAGS="$CFLAGS"
1100 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
1101 saved_CXXFLAGS="$CXXFLAGS"
1102 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include"
1103 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1104         strsignal strstr stpcpy strverscmp \
1105         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1106         free basename getopt clock getpagesize gcc_UNLOCKED_FUNCS, , ,[
1107 #include "ansidecl.h"
1108 #include "system.h"])
1109
1110 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1111 #include "ansidecl.h"
1112 #include "system.h"
1113 #ifdef HAVE_SYS_RESOURCE_H
1114 #include <sys/resource.h>
1115 #endif
1116 ])
1117
1118 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1119 #include "ansidecl.h"
1120 #include "system.h"
1121 #ifdef HAVE_SYS_RESOURCE_H
1122 #include <sys/resource.h>
1123 #endif
1124 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1125 [Define to `long' if <sys/resource.h> doesn't define.])])
1126
1127 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1128 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1129 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1130 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1131 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1132 #include "ansidecl.h"
1133 #include "system.h"
1134 #ifdef HAVE_LDFCN_H
1135 #undef FREAD
1136 #undef FWRITE
1137 #include <ldfcn.h>
1138 #endif
1139 ])
1140
1141 gcc_AC_CHECK_DECLS(times, , ,[
1142 #include "ansidecl.h"
1143 #include "system.h"
1144 #ifdef HAVE_SYS_TIMES_H
1145 #include <sys/times.h>
1146 #endif
1147 ])
1148
1149 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1150 #include "ansidecl.h"
1151 #include "system.h"
1152 #include <signal.h>
1153 ])
1154
1155 # g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which hides the madvise()
1156 # prototype.
1157 AS_IF([test "$ENABLE_BUILD_WITH_CXX" = "yes"],
1158   [AC_LANG_PUSH([C++])
1159    gcc_AC_CHECK_DECLS(madvise, , ,[
1160      #include "ansidecl.h"
1161      #include "system.h"
1162    ])
1163    AC_LANG_POP([C++])],
1164   [gcc_AC_CHECK_DECLS(madvise, , ,[
1165      #include "ansidecl.h"
1166      #include "system.h"
1167    ])
1168 ])
1169
1170 # More time-related stuff.
1171 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1172 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1173 #include "ansidecl.h"
1174 #include "system.h"
1175 #ifdef HAVE_SYS_TIMES_H
1176 #include <sys/times.h>
1177 #endif
1178 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1179 if test $ac_cv_struct_tms = yes; then
1180   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1181   [Define if <sys/times.h> defines struct tms.])
1182 fi
1183
1184 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1185 # revisit after autoconf 2.50.
1186 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1187 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1188 #include "ansidecl.h"
1189 #include "system.h"
1190 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1191 if test $gcc_cv_type_clock_t = yes; then
1192   AC_DEFINE(HAVE_CLOCK_T, 1,
1193   [Define if <time.h> defines clock_t.])
1194 fi
1195
1196 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1197 CFLAGS="$saved_CFLAGS"
1198 CXXFLAGS="$saved_CXXFLAGS"
1199
1200 # mkdir takes a single argument on some systems.
1201 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1202
1203 # File extensions
1204 manext='.1'
1205 objext='.o'
1206 AC_SUBST(manext)
1207 AC_SUBST(objext)
1208
1209 # With Setjmp/Longjmp based exception handling.
1210 AC_ARG_ENABLE(sjlj-exceptions,
1211 [AS_HELP_STRING([--enable-sjlj-exceptions],
1212                 [arrange to use setjmp/longjmp exception handling])],
1213 [case $target in
1214   *-*-hpux10*)
1215     if test $enableval != yes; then
1216       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1217       enableval=yes
1218     fi
1219     ;;
1220 esac
1221 force_sjlj_exceptions=yes],
1222 [case $target in
1223   *-*-hpux10*)
1224     force_sjlj_exceptions=yes
1225     enableval=yes
1226     ;;
1227   *)
1228     force_sjlj_exceptions=no
1229     ;;
1230 esac])
1231 if test $force_sjlj_exceptions = yes; then
1232   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1233   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1234     [Define 0/1 to force the choice for exception handling model.])
1235 fi
1236
1237 # --------------------------------------------------------
1238 # Build, host, and target specific configuration fragments
1239 # --------------------------------------------------------
1240
1241 # Collect build-machine-specific information.
1242 . ${srcdir}/config.build
1243
1244 # Collect host-machine-specific information.
1245 . ${srcdir}/config.host
1246
1247 target_gtfiles=
1248
1249 # Collect target-machine-specific information.
1250 . ${srcdir}/config.gcc
1251
1252 extra_objs="${host_extra_objs} ${extra_objs}"
1253 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1254
1255 # Default the target-machine variables that were not explicitly set.
1256 if test x"$tm_file" = x
1257 then tm_file=$cpu_type/$cpu_type.h; fi
1258
1259 if test x"$extra_headers" = x
1260 then extra_headers=; fi
1261
1262 if test x$md_file = x
1263 then md_file=$cpu_type/$cpu_type.md; fi
1264
1265 if test x$out_file = x
1266 then out_file=$cpu_type/$cpu_type.c; fi
1267
1268 if test x"$tmake_file" = x
1269 then tmake_file=$cpu_type/t-$cpu_type
1270 fi
1271
1272 # Support --enable-initfini-array.
1273 if test x$enable_initfini_array != xno; then
1274   tm_file="${tm_file} initfini-array.h"
1275 fi
1276
1277 if test x"$dwarf2" = xyes
1278 then tm_file="$tm_file tm-dwarf2.h"
1279 fi
1280
1281 # Say what files are being used for the output code and MD file.
1282 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1283 echo "Using \`$srcdir/config/$md_file' as machine description file."
1284
1285 # If any of the xm_file variables contain nonexistent files, warn
1286 # about them and drop them.
1287
1288 bx=
1289 for x in $build_xm_file; do
1290   if    test -f $srcdir/config/$x
1291   then      bx="$bx $x"
1292   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1293   fi
1294 done
1295 build_xm_file="$bx"
1296
1297 hx=
1298 for x in $host_xm_file; do
1299   if    test -f $srcdir/config/$x
1300   then      hx="$hx $x"
1301   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1302   fi
1303 done
1304 host_xm_file="$hx"
1305
1306 tx=
1307 for x in $xm_file; do
1308   if    test -f $srcdir/config/$x
1309   then      tx="$tx $x"
1310   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1311   fi
1312 done
1313 xm_file="$tx"
1314
1315 count=a
1316 for f in $tm_file; do
1317         count=${count}x
1318 done
1319 if test $count = ax; then
1320         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1321 else
1322         echo "Using the following target machine macro files:"
1323         for f in $tm_file; do
1324                 echo "  $srcdir/config/$f"
1325         done
1326 fi
1327
1328 if test x$need_64bit_hwint = xyes; then
1329         AC_DEFINE(NEED_64BIT_HOST_WIDE_INT, 1,
1330 [Define to 1 if HOST_WIDE_INT must be 64 bits wide (see hwint.h).])
1331 fi
1332
1333 if test x$use_long_long_for_widest_fast_int = xyes; then
1334         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1335 [Define to 1 if the 'long long' (or '__int64') is wider than 'long' but still
1336 efficiently supported by the host hardware.])
1337 fi
1338
1339 count=a
1340 for f in $host_xm_file; do
1341         count=${count}x
1342 done
1343 if test $count = a; then
1344         :
1345 elif test $count = ax; then
1346         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1347 else
1348         echo "Using the following host machine macro files:"
1349         for f in $host_xm_file; do
1350                 echo "  $srcdir/config/$f"
1351         done
1352 fi
1353 echo "Using ${out_host_hook_obj} for host machine hooks."
1354
1355 if test "$host_xm_file" != "$build_xm_file"; then
1356         count=a
1357         for f in $build_xm_file; do
1358                 count=${count}x
1359         done
1360         if test $count = a; then
1361                 :
1362         elif test $count = ax; then
1363                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1364         else
1365                 echo "Using the following build machine macro files:"
1366                 for f in $build_xm_file; do
1367                         echo "  $srcdir/config/$f"
1368                 done
1369         fi
1370 fi
1371
1372 if test -n "$configured_native_system_header_dir"; then
1373   native_system_header_dir=$configured_native_system_header_dir
1374 fi
1375 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1376 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1377
1378 case ${host} in
1379   powerpc*-*-darwin*)
1380     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1381       gcc_cv_mcontext_underscores,
1382       AC_COMPILE_IFELSE([
1383 #include <sys/cdefs.h>
1384 #include <sys/signal.h>
1385 #include <ucontext.h>
1386 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1387 ],
1388         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1389       if test $gcc_cv_mcontext_underscores = yes; then
1390         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1391           [mcontext_t fields start with __])
1392       fi
1393     ;;
1394 esac
1395
1396 # ---------
1397 # Threading
1398 # ---------
1399
1400 # Check if a valid thread package
1401 case ${enable_threads} in
1402   "" | no)
1403     # No threads
1404     target_thread_file='single'
1405     ;;
1406   yes)
1407     # default
1408     target_thread_file='single'
1409     ;;
1410   aix | dce | lynx | mipssde | posix | rtems | \
1411   single | tpf | vxworks | win32)
1412     target_thread_file=${enable_threads}
1413     ;;
1414   *)
1415     echo "${enable_threads} is an unknown thread package" 1>&2
1416     exit 1
1417     ;;
1418 esac
1419
1420 if test x${thread_file} = x; then
1421   # No thread file set by target-specific clauses in config.gcc,
1422   # so use file chosen by default logic above
1423   thread_file=${target_thread_file}
1424 fi
1425
1426 # --------
1427 # UNSORTED
1428 # --------
1429
1430 use_cxa_atexit=no
1431 if test x$enable___cxa_atexit = xyes || \
1432    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1433   if test x$host = x$target; then
1434     case $host in
1435       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1436       # keyed to flag_use_cxa_atexit
1437       *-*-mingw32*)
1438         use_cxa_atexit=yes
1439         ;;
1440       *)
1441         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1442           [echo "__cxa_atexit can't be enabled on this target"])
1443         ;;
1444     esac
1445   else
1446     # We can't check for __cxa_atexit when building a cross, so assume
1447     # it is available
1448     use_cxa_atexit=yes
1449   fi
1450   if test x$use_cxa_atexit = xyes; then
1451     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1452       [Define if you want to use __cxa_atexit, rather than atexit, to
1453       register C++ destructors for local statics and global objects.
1454       This is essential for fully standards-compliant handling of
1455       destructors, but requires __cxa_atexit in libc.])
1456   fi
1457 fi
1458
1459 # Look for a file containing extra machine modes.
1460 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1461   extra_modes_file='$(srcdir)'/config/${extra_modes}
1462   AC_SUBST(extra_modes_file)
1463   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1464   [Define to the name of a file containing a list of extra machine modes
1465    for this architecture.])
1466 fi
1467
1468 # Convert extra_options into a form suitable for Makefile use.
1469 extra_opt_files=
1470 all_opt_files=
1471 for f in $extra_options; do
1472   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1473   all_opt_files="$all_opt_files $srcdir/config/$f"
1474 done
1475 AC_SUBST(extra_opt_files)
1476
1477 # auto-host.h is the file containing items generated by autoconf and is
1478 # the first file included by config.h.
1479 # If host=build, it is correct to have bconfig include auto-host.h
1480 # as well.  If host!=build, we are in error and need to do more
1481 # work to find out the build config parameters.
1482 if test x$host = x$build
1483 then
1484         build_auto=auto-host.h
1485 else
1486         # We create a subdir, then run autoconf in the subdir.
1487         # To prevent recursion we set host and build for the new
1488         # invocation of configure to the build for this invocation
1489         # of configure.
1490         tempdir=build.$$
1491         rm -rf $tempdir
1492         mkdir $tempdir
1493         cd $tempdir
1494         case ${srcdir} in
1495         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1496         *) realsrcdir=../${srcdir};;
1497         esac
1498         saved_CFLAGS="${CFLAGS}"
1499         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1500         LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1501         ${realsrcdir}/configure \
1502                 --enable-languages=${enable_languages-all} \
1503                 --target=$target_alias --host=$build_alias --build=$build_alias
1504         CFLAGS="${saved_CFLAGS}"
1505
1506         # We just finished tests for the build machine, so rename
1507         # the file auto-build.h in the gcc directory.
1508         mv auto-host.h ../auto-build.h
1509         cd ..
1510         rm -rf $tempdir
1511         build_auto=auto-build.h
1512 fi
1513 AC_SUBST(build_subdir)
1514
1515 tm_file="${tm_file} defaults.h"
1516 tm_p_file="${tm_p_file} tm-preds.h"
1517 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1518 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1519 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1520 # put this back in temporarily.
1521 xm_file="auto-host.h ansidecl.h ${xm_file}"
1522
1523 # --------
1524 # UNSORTED
1525 # --------
1526
1527 changequote(,)dnl
1528 # Compile in configure arguments.
1529 if test -f configargs.h ; then
1530         # Being re-configured.
1531         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1532         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1533 else
1534         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1535 fi
1536
1537 # Double all backslashes and backslash all quotes to turn
1538 # gcc_config_arguments into a C string.
1539 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1540 $gcc_config_arguments
1541 EOF
1542 gcc_config_arguments_str=`cat conftest.out`
1543 rm -f conftest.out
1544
1545 cat > configargs.h <<EOF
1546 /* Generated automatically. */
1547 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1548 static const char thread_model[] = "$thread_file";
1549
1550 static const struct {
1551   const char *name, *value;
1552 } configure_default_options[] = $configure_default_options;
1553 EOF
1554 changequote([,])dnl
1555
1556 changequote(,)dnl
1557 gcc_BASEVER=`cat $srcdir/BASE-VER`
1558 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1559 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1560 if test -f $srcdir/REVISION ; then
1561         gcc_REVISION=`cat $srcdir/REVISION`
1562 else
1563         gcc_REVISION=""
1564 fi
1565 cat > plugin-version.h <<EOF
1566 #include "configargs.h"
1567
1568 #define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
1569 #define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
1570 #define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
1571 #define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
1572
1573 static char basever[] = "$gcc_BASEVER";
1574 static char datestamp[] = "$gcc_DATESTAMP";
1575 static char devphase[] = "$gcc_DEVPHASE";
1576 static char revision[] = "$gcc_REVISION";
1577
1578 /* FIXME plugins: We should make the version information more precise.
1579    One way to do is to add a checksum. */
1580
1581 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1582                                                 devphase, revision,
1583                                                 configuration_arguments};
1584 EOF
1585 changequote([,])dnl
1586
1587 # Internationalization
1588 ZW_GNU_GETTEXT_SISTER_DIR
1589
1590 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1591 # -liconv on the link line twice.
1592 case "$LIBINTL" in *$LIBICONV*)
1593         LIBICONV= ;;
1594 esac
1595
1596 AC_ARG_ENABLE(secureplt,
1597 [AS_HELP_STRING([--enable-secureplt],
1598                 [enable -msecure-plt by default for PowerPC])],
1599 [], [])
1600
1601 AC_ARG_ENABLE(leading-mingw64-underscores,
1602   AS_HELP_STRING([--enable-leading-mingw64-underscores],
1603                  [enable leading underscores on 64 bit mingw targets]),
1604   [],[])
1605 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1606   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1607     [Define if we should use leading underscore on 64 bit mingw targets])])
1608
1609 AC_ARG_ENABLE(cld,
1610 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
1611 [enable_cld=no])
1612
1613 AC_ARG_ENABLE(frame-pointer,
1614 [AS_HELP_STRING([--enable-frame-pointer],
1615                 [enable -fno-omit-frame-pointer by default for 32bit x86])], [],
1616 [
1617 case $target_os in
1618 linux* | darwin[[8912]]*)
1619   # Enable -fomit-frame-pointer by default for Linux and Darwin with
1620   # DWARF2.
1621   enable_frame_pointer=no
1622   ;;
1623 *)
1624   enable_frame_pointer=yes
1625   ;;
1626 esac
1627 ])
1628
1629 # Windows32 Registry support for specifying GCC installation paths.
1630 AC_ARG_ENABLE(win32-registry,
1631 [AS_HELP_STRING([--disable-win32-registry],
1632                 [disable lookup of installation paths in the
1633                  Registry on Windows hosts])
1634 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
1635 AS_HELP_STRING([--enable-win32-registry=KEY],
1636                [use KEY instead of GCC version as the last portion
1637                 of the registry key])],,)
1638
1639 case $host_os in
1640   win32 | pe | cygwin* | mingw32* | uwin*)
1641     if test "x$enable_win32_registry" != xno; then
1642       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1643     fi
1644
1645     if test "x$enable_win32_registry" != xno; then
1646       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1647   [Define to 1 if installation paths should be looked up in the Windows
1648    Registry. Ignored on non-Windows hosts.])
1649
1650       if test "x$enable_win32_registry" != xyes \
1651          && test "x$enable_win32_registry" != x; then
1652         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1653   [Define to be the last component of the Windows registry key under which
1654    to look for installation paths.  The full key used will be
1655    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1656    The default is the GCC version number.])
1657       fi
1658     fi
1659   ;;
1660 esac
1661
1662 # Get an absolute path to the GCC top-level source directory
1663 holddir=`${PWDCMD-pwd}`
1664 cd $srcdir
1665 topdir=`${PWDCMD-pwd}`
1666 cd $holddir
1667
1668 # Conditionalize the makefile for this host machine.
1669 xmake_file=
1670 for f in ${host_xmake_file}
1671 do
1672         if test -f ${srcdir}/config/$f
1673         then
1674                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1675         fi
1676 done
1677
1678 # Conditionalize the makefile for this target machine.
1679 tmake_file_=
1680 for f in ${tmake_file}
1681 do
1682         if test -f ${srcdir}/config/$f
1683         then
1684                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1685         fi
1686 done
1687 tmake_file="${tmake_file_}"
1688
1689 out_object_file=`basename $out_file .c`.o
1690 common_out_object_file=`basename $common_out_file .c`.o
1691
1692 tm_file_list="options.h"
1693 tm_include_list="options.h insn-constants.h"
1694 for f in $tm_file; do
1695   case $f in
1696     ./* )
1697        f=`echo $f | sed 's/^..//'`
1698        tm_file_list="${tm_file_list} $f"
1699        tm_include_list="${tm_include_list} $f"
1700        ;;
1701     defaults.h )
1702        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1703        tm_include_list="${tm_include_list} $f"
1704        ;;
1705     * )
1706        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1707        tm_include_list="${tm_include_list} config/$f"
1708        ;;
1709   esac
1710 done
1711
1712 tm_p_file_list=
1713 tm_p_include_list=
1714 for f in $tm_p_file; do
1715   case $f in
1716     tm-preds.h )
1717        tm_p_file_list="${tm_p_file_list} $f"
1718        tm_p_include_list="${tm_p_include_list} $f"
1719        ;;
1720     * )
1721        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1722        tm_p_include_list="${tm_p_include_list} config/$f"
1723   esac
1724 done
1725
1726 xm_file_list=
1727 xm_include_list=
1728 for f in $xm_file; do
1729   case $f in
1730     ansidecl.h )
1731        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1732        xm_include_list="${xm_include_list} $f"
1733        ;;
1734     auto-host.h )
1735        xm_file_list="${xm_file_list} $f"
1736        xm_include_list="${xm_include_list} $f"
1737        ;;
1738     * )
1739        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1740        xm_include_list="${xm_include_list} config/$f"
1741        ;;
1742   esac
1743 done
1744
1745 host_xm_file_list=
1746 host_xm_include_list=
1747 for f in $host_xm_file; do
1748   case $f in
1749     ansidecl.h )
1750        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1751        host_xm_include_list="${host_xm_include_list} $f"
1752        ;;
1753     auto-host.h )
1754        host_xm_file_list="${host_xm_file_list} $f"
1755        host_xm_include_list="${host_xm_include_list} $f"
1756        ;;
1757     * )
1758        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1759        host_xm_include_list="${host_xm_include_list} config/$f"
1760        ;;
1761   esac
1762 done
1763
1764 build_xm_file_list=
1765 for f in $build_xm_file; do
1766   case $f in
1767     ansidecl.h )
1768        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1769        build_xm_include_list="${build_xm_include_list} $f"
1770        ;;
1771     auto-build.h | auto-host.h )
1772        build_xm_file_list="${build_xm_file_list} $f"
1773        build_xm_include_list="${build_xm_include_list} $f"
1774        ;;
1775     * )
1776        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1777        build_xm_include_list="${build_xm_include_list} config/$f"
1778        ;;
1779   esac
1780 done
1781
1782 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1783 # cross-compiler which does not use the native headers and libraries.
1784 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1785 CROSS=                                          AC_SUBST(CROSS)
1786 ALL=all.internal                                AC_SUBST(ALL)
1787 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1788
1789 if test "x$with_build_sysroot" != x; then
1790   build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1791 else
1792   # This value is used, even on a native system, because
1793   # CROSS_SYSTEM_HEADER_DIR is just
1794   # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1795   build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1796 fi
1797
1798 if test x$host != x$target
1799 then
1800         CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1801         ALL=all.cross
1802         SYSTEM_HEADER_DIR=$build_system_header_dir
1803         case "$host","$target" in
1804         # Darwin crosses can use the host system's libraries and headers,
1805         # because of the fat library support.  Of course, it must be the
1806         # same version of Darwin on both sides.  Allow the user to
1807         # just say --target=foo-darwin without a version number to mean
1808         # "the version on this system".
1809             *-*-darwin*,*-*-darwin*)
1810                 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1811                 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1812                 if test $hostos = $targetos -o $targetos = darwin ; then
1813                     CROSS=
1814                     SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1815                     with_headers=yes
1816                 fi
1817                 ;;
1818
1819             i?86-*-*,x86_64-*-* \
1820             | powerpc*-*-*,powerpc64*-*-*)
1821                 CROSS="$CROSS -DNATIVE_CROSS" ;;
1822         esac
1823
1824         case $target in
1825                 *-*-mingw*)
1826                         if test "x$with_headers" = x; then
1827                                 with_headers=yes
1828                         fi
1829                         ;;
1830                 *)
1831                         ;;
1832         esac
1833 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1834         SYSTEM_HEADER_DIR=$build_system_header_dir
1835 fi
1836
1837 # If this is a cross-compiler that does not
1838 # have its own set of headers then define
1839 # inhibit_libc
1840
1841 # If this is using newlib, without having the headers available now,
1842 # then define inhibit_libc in LIBGCC2_CFLAGS.
1843 # This prevents libgcc2 from containing any code which requires libc
1844 # support.
1845 : ${inhibit_libc=false}
1846 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1847        test x$with_newlib = xyes ; } &&
1848      { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
1849        inhibit_libc=true
1850 fi
1851 AC_SUBST(inhibit_libc)
1852
1853 # When building gcc with a cross-compiler, we need to adjust things so
1854 # that the generator programs are still built with the native compiler.
1855 # Also, we cannot run fixincludes.
1856
1857 # These are the normal (build=host) settings:
1858 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
1859 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
1860 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
1861 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
1862
1863 # And these apply if build != host, or we are generating coverage data
1864 if test x$build != x$host || test "x$coverage_flags" != x
1865 then
1866     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1867     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
1868 fi
1869
1870 # Expand extra_headers to include complete path.
1871 # This substitutes for lots of t-* files.
1872 extra_headers_list=
1873 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1874 for file in ${extra_headers} ; do
1875   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1876 done
1877
1878 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
1879 if test x"$use_gcc_tgmath" = xyes
1880 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
1881 fi
1882
1883 # Define collect2 in Makefile.
1884 case $host_can_use_collect2 in
1885   no) collect2= ;;
1886   *) collect2='collect2$(exeext)' ;;
1887 esac
1888 AC_SUBST([collect2])
1889
1890 # Add a definition of USE_COLLECT2 if system wants one.
1891 case $use_collect2 in
1892   no) use_collect2= ;;
1893   "") ;;
1894   *)
1895     host_xm_defines="${host_xm_defines} USE_COLLECT2"
1896     xm_defines="${xm_defines} USE_COLLECT2"
1897     case $host_can_use_collect2 in
1898       no)
1899         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1900         ;;
1901     esac
1902     ;;
1903 esac
1904
1905 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
1906 [Define to the name of the LTO plugin DSO that must be
1907   passed to the linker's -plugin=LIB option.])
1908
1909 # ---------------------------
1910 # Assembler & linker features
1911 # ---------------------------
1912
1913 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
1914 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
1915 # However when ld-new is first executed from the build tree, libtool will
1916 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
1917 # to the build tree.  While doing this we need to use the previous-stage
1918 # linker, or we have an infinite loop.  The presence of a shell script as
1919 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
1920 # the gcc/collect-ld script.  So we need to know how libtool works, or
1921 # exec-tool will fail.
1922
1923 m4_defun([_LT_CONFIG_COMMANDS], [])
1924 AC_PROG_LIBTOOL
1925 AC_SUBST(objdir)
1926 AC_SUBST(enable_fast_install)
1927
1928 # Identify the assembler which will work hand-in-glove with the newly
1929 # built GCC, so that we can examine its features.  This is the assembler
1930 # which will be driven by the driver program.
1931 #
1932 # If build != host, and we aren't building gas in-tree, we identify a
1933 # build->target assembler and hope that it will have the same features
1934 # as the host->target assembler we'll be using.
1935 gcc_cv_gas_major_version=
1936 gcc_cv_gas_minor_version=
1937 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
1938
1939 m4_pattern_allow([AS_FOR_TARGET])dnl
1940 AS_VAR_SET_IF(gcc_cv_as,, [
1941 if test -x "$DEFAULT_ASSEMBLER"; then
1942         gcc_cv_as="$DEFAULT_ASSEMBLER"
1943 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
1944      && test -f ../gas/Makefile \
1945      && test x$build = x$host; then
1946         gcc_cv_as=../gas/as-new$build_exeext
1947 elif test -x as$build_exeext; then
1948         # Build using assembler in the current directory.
1949         gcc_cv_as=./as$build_exeext
1950 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
1951         gcc_cv_as="$AS_FOR_TARGET"
1952 else
1953         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
1954 fi])
1955
1956 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
1957 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
1958 case "$ORIGINAL_AS_FOR_TARGET" in
1959   ./as | ./as$build_exeext) ;;
1960   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
1961 esac
1962
1963 AC_MSG_CHECKING(what assembler to use)
1964 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
1965   # Single tree build which includes gas.  We want to prefer it
1966   # over whatever linker top-level may have detected, since
1967   # we'll use what we're building after installation anyway.
1968   AC_MSG_RESULT(newly built gas)
1969   in_tree_gas=yes
1970   _gcc_COMPUTE_GAS_VERSION
1971   in_tree_gas_is_elf=no
1972   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
1973      || (grep 'obj_format = multi' ../gas/Makefile \
1974          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
1975   then
1976     in_tree_gas_is_elf=yes
1977   fi
1978 else
1979   AC_MSG_RESULT($gcc_cv_as)
1980   in_tree_gas=no
1981 fi
1982
1983 # Identify the linker which will work hand-in-glove with the newly
1984 # built GCC, so that we can examine its features.  This is the linker
1985 # which will be driven by the driver program.
1986 #
1987 # If build != host, and we aren't building gas in-tree, we identify a
1988 # build->target linker and hope that it will have the same features
1989 # as the host->target linker we'll be using.
1990 gcc_cv_gld_major_version=
1991 gcc_cv_gld_minor_version=
1992 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
1993 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
1994
1995 AS_VAR_SET_IF(gcc_cv_ld,, [
1996 if test -x "$DEFAULT_LINKER"; then
1997         gcc_cv_ld="$DEFAULT_LINKER"
1998 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
1999      && test -f ../ld/Makefile \
2000      && test x$build = x$host; then
2001         gcc_cv_ld=../ld/ld-new$build_exeext
2002 elif test -x collect-ld$build_exeext; then
2003         # Build using linker in the current directory.
2004         gcc_cv_ld=./collect-ld$build_exeext
2005 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2006         gcc_cv_ld="$LD_FOR_TARGET"
2007 else
2008         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2009 fi])
2010
2011 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2012 PLUGIN_LD=`basename $gcc_cv_ld`
2013 AC_ARG_WITH(plugin-ld,
2014 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2015 [if test x"$withval" != x; then
2016    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2017    PLUGIN_LD="$withval"
2018  fi])
2019 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2020 AC_DEFINE_UNQUOTED(PLUGIN_LD, "$PLUGIN_LD", [Specify plugin linker])
2021
2022 # Check to see if we are using gold instead of ld
2023 AC_MSG_CHECKING(whether we are using gold)
2024 ld_is_gold=no
2025 if test x$gcc_cv_ld != x; then
2026   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2027      | grep "GNU gold" > /dev/null; then
2028     ld_is_gold=yes
2029   fi
2030 fi
2031 AC_MSG_RESULT($ld_is_gold)
2032
2033 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2034 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2035 case "$ORIGINAL_LD_FOR_TARGET" in
2036   ./collect-ld | ./collect-ld$build_exeext) ;;
2037   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2038 esac
2039
2040 AC_MSG_CHECKING(what linker to use)
2041 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2042    || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2043         # Single tree build which includes ld.  We want to prefer it
2044         # over whatever linker top-level may have detected, since
2045         # we'll use what we're building after installation anyway.
2046         AC_MSG_RESULT(newly built ld)
2047         in_tree_ld=yes
2048         in_tree_ld_is_elf=no
2049         if (grep 'EMUL = .*elf' ../ld/Makefile \
2050             || grep 'EMUL = .*linux' ../ld/Makefile \
2051             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2052           in_tree_ld_is_elf=yes
2053         elif test "$ld_is_gold" = yes; then
2054           in_tree_ld_is_elf=yes
2055         fi
2056         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
2057         do
2058 changequote(,)dnl
2059                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
2060                 if test x$gcc_cv_gld_version != x; then
2061                         break
2062                 fi
2063         done
2064         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2065         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2066 changequote([,])dnl
2067 else
2068         AC_MSG_RESULT($gcc_cv_ld)
2069         in_tree_ld=no
2070 fi
2071
2072 # Figure out what nm we will be using.
2073 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2074 AS_VAR_SET_IF(gcc_cv_nm,, [
2075 if test -f $gcc_cv_binutils_srcdir/configure.in \
2076      && test -f ../binutils/Makefile \
2077      && test x$build = x$host; then
2078         gcc_cv_nm=../binutils/nm-new$build_exeext
2079 elif test -x nm$build_exeext; then
2080         gcc_cv_nm=./nm$build_exeext
2081 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2082         gcc_cv_nm="$NM_FOR_TARGET"
2083 else
2084         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2085 fi])
2086
2087 AC_MSG_CHECKING(what nm to use)
2088 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2089         # Single tree build which includes binutils.
2090         AC_MSG_RESULT(newly built nm)
2091         in_tree_nm=yes
2092 else
2093         AC_MSG_RESULT($gcc_cv_nm)
2094         in_tree_nm=no
2095 fi
2096
2097 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2098 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2099 case "$ORIGINAL_NM_FOR_TARGET" in
2100   ./nm | ./nm$build_exeext) ;;
2101   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2102 esac
2103
2104
2105 # Figure out what objdump we will be using.
2106 AS_VAR_SET_IF(gcc_cv_objdump,, [
2107 if test -f $gcc_cv_binutils_srcdir/configure.in \
2108      && test -f ../binutils/Makefile \
2109      && test x$build = x$host; then
2110         # Single tree build which includes binutils.
2111         gcc_cv_objdump=../binutils/objdump$build_exeext
2112 elif test -x objdump$build_exeext; then
2113         gcc_cv_objdump=./objdump$build_exeext
2114 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2115         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2116 else
2117         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2118 fi])
2119
2120 AC_MSG_CHECKING(what objdump to use)
2121 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2122         # Single tree build which includes binutils.
2123         AC_MSG_RESULT(newly built objdump)
2124 elif test x$gcc_cv_objdump = x; then
2125         AC_MSG_RESULT(not found)
2126 else
2127         AC_MSG_RESULT($gcc_cv_objdump)
2128 fi
2129
2130 # Figure out what readelf we will be using.
2131 AS_VAR_SET_IF(gcc_cv_readelf,, [
2132 if test -f $gcc_cv_binutils_srcdir/configure.in \
2133      && test -f ../binutils/Makefile \
2134      && test x$build = x$host; then
2135         # Single tree build which includes binutils.
2136         gcc_cv_readelf=../binutils/readelf$build_exeext
2137 elif test -x readelf$build_exeext; then
2138         gcc_cv_readelf=./readelf$build_exeext
2139 else
2140         AC_PATH_PROG(gcc_cv_readelf, readelf)
2141 fi])
2142
2143 AC_MSG_CHECKING(what readelf to use)
2144 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2145         # Single tree build which includes binutils.
2146         AC_MSG_RESULT(newly built readelf)
2147 elif test x$gcc_cv_readelf = x; then
2148         AC_MSG_RESULT(not found)
2149 else
2150         AC_MSG_RESULT($gcc_cv_readelf)
2151 fi
2152
2153 # Figure out what assembler alignment features are present.
2154 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2155  [2,6,0],,
2156 [.balign 4
2157 .p2align 2],,
2158 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2159   [Define if your assembler supports .balign and .p2align.])])
2160
2161 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2162  [2,8,0],,
2163  [.p2align 4,,7],,
2164 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2165   [Define if your assembler supports specifying the maximum number
2166    of bytes to skip when using the GAS .p2align command.])])
2167
2168 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2169  [2,8,0],,
2170  [.literal16],,
2171 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2172   [Define if your assembler supports .literal16.])])
2173
2174 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2175  [elf,2,9,0],,
2176  [conftest_label1: .word 0
2177 .subsection -1
2178 conftest_label2: .word 0
2179 .previous],
2180  [if test x$gcc_cv_nm != x; then
2181     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2182     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2183     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2184     then :
2185     else gcc_cv_as_subsection_m1=yes
2186     fi
2187     rm -f conftest.nm1 conftest.nm2
2188   fi],
2189  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2190   [Define if your assembler supports .subsection and .subsection -1 starts
2191    emitting at the beginning of your section.])])
2192
2193 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2194  [2,2,0],,
2195  [      .weak foobar],,
2196 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2197
2198 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2199  [2,17,0],,
2200  [      .weakref foobar, barfnot],,
2201 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2202
2203 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2204  [2,15,91],,
2205  [      .SPACE $TEXT$
2206         .NSUBSPA $CODE$,COMDAT],,
2207 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2208
2209 # .hidden needs to be supported in both the assembler and the linker,
2210 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2211 # This is irritatingly difficult to feature test for; we have to check the
2212 # date string after the version number.  If we've got an in-tree
2213 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2214 # to be safe.
2215 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2216 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2217  [elf,2,13,0],,
2218 [       .hidden foobar
2219 foobar:],[
2220 # Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with
2221 # STV_HIDDEN, so disable .hidden support if so.
2222 case "${target}" in
2223   i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
2224     if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then
2225       cat > conftest.s <<EOF
2226 .globl hidden
2227         .hidden hidden
2228 hidden:
2229 .globl default
2230         .set    default,hidden
2231 EOF
2232       if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
2233         && $gcc_cv_objdump -t conftest.o 2>/dev/null | \
2234         grep '\.hidden default' > /dev/null; then
2235         gcc_cv_as_hidden=no
2236       else
2237         gcc_cv_as_hidden=yes
2238       fi
2239     else
2240       # Assume bug is present if objdump is missing.
2241       gcc_cv_as_hidden=no
2242     fi
2243     ;;
2244   *)
2245     gcc_cv_as_hidden=yes
2246     ;;
2247 esac])
2248 case "${target}" in
2249   *-*-darwin*)
2250     # Darwin as has some visibility support, though with a different syntax.
2251     gcc_cv_as_hidden=yes
2252     ;;
2253 esac
2254
2255 # gnu_indirect_function type is an extension proposed at
2256 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2257 # selection of function implementation
2258 AC_ARG_ENABLE(gnu-indirect-function,
2259  [AS_HELP_STRING([--enable-gnu-indirect-function],
2260                  [enable the use of the @gnu_indirect_function to glibc systems])],
2261  [case $enable_gnu_indirect_function in
2262     yes | no) ;;
2263     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2264 Valid choices are 'yes' and 'no'.]) ;;
2265   esac],
2266  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2267 if test x$enable_gnu_indirect_function = xyes; then
2268   AC_DEFINE(HAVE_GNU_INDIRECT_FUNCTION, 1,
2269    [Define if your system supports gnu indirect functions.])
2270 fi
2271
2272 changequote(,)dnl
2273 if test $in_tree_ld != yes ; then
2274   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2275   if echo "$ld_ver" | grep GNU > /dev/null; then
2276     if test x"$ld_is_gold" = xyes; then
2277       # GNU gold --version looks like this:
2278       #
2279       # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
2280       #
2281       # We extract the binutils version which is more familiar and specific
2282       # than the gold version.
2283       ld_vers=`echo $ld_ver | sed -n \
2284           -e 's,^[^)]*[  ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
2285     else
2286       # GNU ld --version looks like this:
2287       #
2288       # GNU ld (GNU Binutils) 2.21.51.20110225
2289       ld_vers=`echo $ld_ver | sed -n \
2290           -e 's,^.*[     ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2291     fi
2292     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2293     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2294     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2295     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2296   else
2297     case "${target}" in
2298       *-*-solaris2*)
2299         # See acinclude.m4 (gcc_SUN_LD_VERSION) for the version number
2300         # format.
2301         #
2302         # Don't reuse gcc_gv_sun_ld_vers_* in case a linker other than
2303         # /usr/ccs/bin/ld has been configured.
2304         ld_ver=`$gcc_cv_ld -V 2>&1`
2305         if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2306           ld_vers=`echo $ld_ver | sed -n \
2307             -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2308           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2309           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2310         fi
2311         ;;
2312     esac
2313   fi
2314 fi
2315 changequote([,])dnl
2316
2317 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2318 [[if test $in_tree_ld = yes ; then
2319   gcc_cv_ld_hidden=no
2320   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2321      && test $in_tree_ld_is_elf = yes; then
2322      gcc_cv_ld_hidden=yes
2323   fi
2324 else
2325   gcc_cv_ld_hidden=yes
2326   if test x"$ld_is_gold" = xyes; then
2327     :
2328   elif echo "$ld_ver" | grep GNU > /dev/null; then
2329     if test 0"$ld_date" -lt 20020404; then
2330       if test -n "$ld_date"; then
2331         # If there was date string, but was earlier than 2002-04-04, fail
2332         gcc_cv_ld_hidden=no
2333       elif test -z "$ld_vers"; then
2334         # If there was no date string nor ld version number, something is wrong
2335         gcc_cv_ld_hidden=no
2336       else
2337         test -z "$ld_vers_patch" && ld_vers_patch=0
2338         if test "$ld_vers_major" -lt 2; then
2339           gcc_cv_ld_hidden=no
2340         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2341           gcc_cv_ld_hidden="no"
2342         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2343           gcc_cv_ld_hidden=no
2344         fi
2345       fi
2346     fi
2347   else
2348     case "${target}" in
2349       *-*-darwin*)
2350         # Darwin ld has some visibility support.
2351         gcc_cv_ld_hidden=yes
2352         ;;
2353       hppa64*-*-hpux* | ia64*-*-hpux*)
2354         gcc_cv_ld_hidden=yes
2355         ;;
2356       *-*-solaris2.8*)
2357         # .hidden support was backported to Solaris 8, starting with ld
2358         # version 1.276.
2359         if test "$ld_vers_minor" -ge 276; then
2360           gcc_cv_ld_hidden=yes
2361         else
2362           gcc_cv_ld_hidden=no
2363         fi
2364         ;;
2365       *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
2366         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2367         # .symbolic was only added in Solaris 9 12/02.
2368         gcc_cv_ld_hidden=yes
2369         ;;
2370       *)
2371         gcc_cv_ld_hidden=no
2372         ;;
2373     esac
2374   fi
2375 fi]])
2376 libgcc_visibility=no
2377 AC_SUBST(libgcc_visibility)
2378 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2379 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2380   libgcc_visibility=yes
2381   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2382   [Define if your assembler and linker support .hidden.])
2383 fi
2384
2385 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2386 gcc_cv_ld_ro_rw_mix=unknown
2387 if test $in_tree_ld = yes ; then
2388   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2389      && test $in_tree_ld_is_elf = yes; then
2390     gcc_cv_ld_ro_rw_mix=read-write
2391   fi
2392 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2393   echo '.section myfoosect, "a"' > conftest1.s
2394   echo '.section myfoosect, "aw"' > conftest2.s
2395   echo '.byte 1' >> conftest2.s
2396   echo '.section myfoosect, "a"' > conftest3.s
2397   echo '.byte 0' >> conftest3.s
2398   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2399      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2400      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2401      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2402         conftest2.o conftest3.o > /dev/null 2>&1; then
2403     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2404                          | sed -e '/myfoosect/!d' -e N`
2405     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2406       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2407         gcc_cv_ld_ro_rw_mix=read-only
2408       else
2409         gcc_cv_ld_ro_rw_mix=read-write
2410       fi
2411     fi
2412   fi
2413 changequote(,)dnl
2414   rm -f conftest.* conftest[123].*
2415 changequote([,])dnl
2416 fi
2417 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2418         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2419   [Define if your linker links a mix of read-only
2420    and read-write sections into a read-write section.])
2421 fi
2422 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2423
2424 gcc_AC_INITFINI_ARRAY
2425
2426 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2427 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2428   [elf,2,11,0],,
2429 [       .data
2430         .uleb128 L2 - L1
2431 L1:
2432         .uleb128 1280
2433         .sleb128 -1010
2434 L2:],
2435 [[# GAS versions before 2.11 do not support uleb128,
2436   # despite appearing to.
2437   # ??? There exists an elf-specific test that will crash
2438   # the assembler.  Perhaps it's better to figure out whether
2439   # arbitrary sections are supported and try the test.
2440   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2441   if echo "$as_ver" | grep GNU > /dev/null; then
2442     as_vers=`echo $as_ver | sed -n \
2443         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2444     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2445     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2446     if test $as_major -eq 2 && test $as_minor -lt 11
2447     then :
2448     else gcc_cv_as_leb128=yes
2449     fi
2450   fi]],
2451   [AC_DEFINE(HAVE_AS_LEB128, 1,
2452     [Define if your assembler supports .sleb128 and .uleb128.])])
2453
2454 # Check if we have assembler support for unwind directives.
2455 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2456   ,,
2457 [       .text
2458         .cfi_startproc
2459         .cfi_offset 0, 0
2460         .cfi_same_value 1
2461         .cfi_def_cfa 1, 2
2462         .cfi_escape 1, 2, 3, 4, 5
2463         .cfi_endproc],
2464 [case "$target" in
2465   *-*-solaris*)
2466     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2467     # read-only and read-write sections, we need to make sure that the
2468     # assembler used emits read-write .eh_frame sections.
2469     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2470       if test "x$gcc_cv_objdump" != x; then
2471         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2472                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2473           gcc_cv_as_cfi_directive=no
2474         else
2475           case "$target" in
2476             i?86-*-solaris2.1[[0-9]]* | x86_64-*-solaris2.1[[0-9]]*)
2477               # On Solaris/x86, make sure that GCC and gas agree on using
2478               # read-only .eh_frame sections for 64-bit.
2479               if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
2480                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2481                         sed -e /.eh_frame/!d -e N | \
2482                         grep READONLY > /dev/null; then
2483                 gcc_cv_as_cfi_directive=yes
2484               else
2485                 gcc_cv_as_cfi_directive=no
2486               fi
2487               ;;
2488             *)
2489               gcc_cv_as_cfi_directive=yes
2490               ;;
2491           esac
2492         fi
2493       else
2494         # no objdump, err on the side of caution
2495         gcc_cv_as_cfi_directive=no
2496       fi
2497     else
2498       gcc_cv_as_cfi_directive=yes
2499     fi
2500     ;;
2501   *-*-*)
2502     gcc_cv_as_cfi_directive=yes
2503     ;;
2504 esac])
2505 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2506 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2507   ,,
2508 [       .text
2509         .cfi_startproc
2510         .cfi_adjust_cfa_offset 64
2511         .skip 75040, 0
2512         .cfi_adjust_cfa_offset 128
2513         .cfi_endproc],
2514 [[
2515 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2516     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2517    gcc_cv_as_cfi_advance_working=yes
2518 fi
2519 ]])
2520 else
2521   # no objdump, err on the side of caution
2522   gcc_cv_as_cfi_advance_working=no
2523 fi
2524 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2525 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2526   [`if test $gcc_cv_as_cfi_directive = yes \
2527        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2528   [Define 0/1 if your assembler supports CFI directives.])
2529
2530 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2531 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2532   gcc_cv_as_cfi_personality_directive, ,,
2533 [       .text
2534         .cfi_startproc
2535         .cfi_personality 0, symbol
2536         .cfi_endproc])
2537 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2538   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2539     then echo 1; else echo 0; fi`],
2540   [Define 0/1 if your assembler supports .cfi_personality.])
2541
2542 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2543   gcc_cv_as_cfi_sections_directive, ,,
2544 [       .text
2545         .cfi_sections .debug_frame, .eh_frame
2546         .cfi_startproc
2547         .cfi_endproc],
2548 [case $target_os in
2549   win32 | pe | cygwin* | mingw32* | uwin*)
2550     # Need to check that we generated the correct relocation for the
2551     # .debug_frame section.  This was fixed for binutils 2.21.
2552     gcc_cv_as_cfi_sections_directive=no
2553     if test "x$gcc_cv_objdump" != x; then
2554      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2555         grep secrel > /dev/null; then
2556       gcc_cv_as_cfi_sections_directive=yes
2557      fi
2558     fi
2559     ;;
2560   *)
2561     gcc_cv_as_cfi_sections_directive=yes
2562     ;;
2563 esac])
2564 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2565 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2566   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2567     then echo 1; else echo 0; fi`],
2568   [Define 0/1 if your assembler supports .cfi_sections.])
2569
2570 # GAS versions up to and including 2.11.0 may mis-optimize
2571 # .eh_frame data.
2572 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2573   [elf,2,12,0],,
2574 [       .text
2575 .LFB1:
2576         .4byte  0
2577 .L1:
2578         .4byte  0
2579 .LFE1:
2580         .section        .eh_frame,"aw",@progbits
2581 __FRAME_BEGIN__:
2582         .4byte  .LECIE1-.LSCIE1
2583 .LSCIE1:
2584         .4byte  0x0
2585         .byte   0x1
2586         .ascii "z\0"
2587         .byte   0x1
2588         .byte   0x78
2589         .byte   0x1a
2590         .byte   0x0
2591         .byte   0x4
2592         .4byte  1
2593         .p2align 1
2594 .LECIE1:
2595 .LSFDE1:
2596         .4byte  .LEFDE1-.LASFDE1
2597 .LASFDE1:
2598         .4byte  .LASFDE1-__FRAME_BEGIN__
2599         .4byte  .LFB1
2600         .4byte  .LFE1-.LFB1
2601         .byte   0x4
2602         .4byte  .LFE1-.LFB1
2603         .byte   0x4
2604         .4byte  .L1-.LFB1
2605 .LEFDE1:],
2606 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2607 cat > conftest.lit <<EOF
2608  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2609  0010 01000000 12000000 18000000 00000000  ................
2610  0020 08000000 04080000 0044               .........D      @&t@
2611 EOF
2612 cat > conftest.big <<EOF
2613  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2614  0010 00000001 00000012 00000018 00000000  ................
2615  0020 00000008 04000000 0844               .........D      @&t@
2616 EOF
2617   # If the assembler didn't choke, and we can objdump,
2618   # and we got the correct data, then succeed.
2619   # The text in the here-document typically retains its unix-style line
2620   # endings, while the output of objdump will use host line endings.
2621   # Therefore, use diff -b for the comparisons.
2622   if test x$gcc_cv_objdump != x \
2623   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2624      | tail -3 > conftest.got \
2625   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2626     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2627   then
2628     gcc_cv_as_eh_frame=yes
2629   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2630     gcc_cv_as_eh_frame=buggy
2631   else
2632     # Uh oh, what do we do now?
2633     gcc_cv_as_eh_frame=no
2634   fi])
2635
2636 if test $gcc_cv_as_eh_frame = buggy; then
2637   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2638   [Define if your assembler mis-optimizes .eh_frame data.])
2639 fi
2640
2641 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2642  [elf,2,12,0], [--fatal-warnings],
2643  [.section .rodata.str, "aMS", @progbits, 1])
2644 if test $gcc_cv_as_shf_merge = no; then
2645   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2646     [elf,2,12,0], [--fatal-warnings],
2647     [.section .rodata.str, "aMS", %progbits, 1])
2648 fi
2649 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2650   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2651 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2652
2653 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
2654  gcc_cv_as_comdat_group,
2655  [elf,2,16,0], [--fatal-warnings],
2656  [.section .text,"axG",@progbits,.foo,comdat])
2657 if test $gcc_cv_as_comdat_group = yes; then
2658   gcc_cv_as_comdat_group_percent=no
2659   gcc_cv_as_comdat_group_group=no
2660 else
2661  gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
2662    gcc_cv_as_comdat_group_percent,
2663    [elf,2,16,0], [--fatal-warnings],
2664    [.section .text,"axG",%progbits,.foo,comdat])
2665  if test $gcc_cv_as_comdat_group_percent = yes; then
2666    gcc_cv_as_comdat_group_group=no
2667  else
2668    case "${target}" in
2669      # Sun as uses a completely different syntax.
2670      *-*-solaris2*)
2671        case "${target}" in
2672          sparc*-*-solaris2*)
2673            conftest_s='
2674                .group foo,".text%foo",#comdat
2675                .section ".text%foo", #alloc,#execinstr,#progbits
2676                .globl foo
2677              foo:
2678              '
2679            ;;
2680          i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
2681            conftest_s='
2682                .group foo,.text%foo,#comdat
2683                .section .text%foo, "ax", @progbits
2684                .globl  foo
2685              foo:
2686              '
2687            ;;
2688        esac
2689        gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
2690          gcc_cv_as_comdat_group_group,
2691          ,, [$conftest_s])
2692        ;;
2693    esac
2694  fi
2695 fi
2696 if test x"$ld_is_gold" = xyes; then
2697   comdat_group=yes
2698 elif test $in_tree_ld = yes ; then
2699   comdat_group=no
2700   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2701      && test $in_tree_ld_is_elf = yes; then
2702      comdat_group=yes
2703   fi
2704 elif echo "$ld_ver" | grep GNU > /dev/null; then
2705   comdat_group=yes
2706   if test 0"$ld_date" -lt 20050308; then
2707     if test -n "$ld_date"; then
2708       # If there was date string, but was earlier than 2005-03-08, fail
2709       comdat_group=no
2710     elif test "$ld_vers_major" -lt 2; then
2711       comdat_group=no
2712     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2713       comdat_group=no
2714     fi
2715   fi
2716 else
2717 changequote(,)dnl
2718   case "${target}" in
2719     *-*-solaris2.1[1-9]*)
2720       comdat_group=no
2721       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
2722       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
2723       # version 1.688.
2724       #
2725       # If using Sun as for COMDAT group as emitted by GCC, one needs at
2726       # least ld version 1.2267.
2727       if test "$ld_vers_major" -gt 1; then
2728         comdat_group=yes
2729       elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
2730         comdat_group=yes
2731       elif test "$ld_vers_minor" -ge 2267; then
2732         comdat_group=yes
2733       fi
2734       ;;
2735     *)
2736       # Assume linkers other than GNU ld don't support COMDAT group.
2737       comdat_group=no
2738       ;;
2739   esac
2740 changequote([,])dnl
2741 fi
2742 # Allow overriding the automatic COMDAT group tests above.
2743 AC_ARG_ENABLE(comdat,
2744   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
2745   [comdat_group="$enable_comdat"])
2746 if test $comdat_group = no; then
2747   gcc_cv_as_comdat_group=no
2748   gcc_cv_as_comdat_group_percent=no
2749   gcc_cv_as_comdat_group_group=no
2750 fi
2751 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2752   [`if test $gcc_cv_as_comdat_group = yes \
2753     || test $gcc_cv_as_comdat_group_percent = yes \
2754     || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
2755 [Define 0/1 if your assembler and linker support COMDAT groups.])
2756
2757 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2758  gcc_cv_as_discriminator,
2759  [2,19,51],,
2760 [       .text
2761         .file 1 "conf.c"
2762         .loc 1 1 0 discriminator 1],,
2763 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2764   [Define if your assembler supports the .loc discriminator sub-directive.])])
2765
2766 # Thread-local storage - the check is heavily parameterized.
2767 conftest_s=
2768 tls_first_major=
2769 tls_first_minor=
2770 tls_as_opt=
2771 case "$target" in
2772 changequote(,)dnl
2773   alpha*-*-*)
2774     conftest_s='
2775         .section ".tdata","awT",@progbits
2776 foo:    .long   25
2777         .text
2778         ldq     $27,__tls_get_addr($29)         !literal!1
2779         lda     $16,foo($29)                    !tlsgd!1
2780         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
2781         ldq     $27,__tls_get_addr($29)         !literal!2
2782         lda     $16,foo($29)                    !tlsldm!2
2783         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
2784         ldq     $1,foo($29)                     !gotdtprel
2785         ldah    $2,foo($29)                     !dtprelhi
2786         lda     $3,foo($2)                      !dtprello
2787         lda     $4,foo($29)                     !dtprel
2788         ldq     $1,foo($29)                     !gottprel
2789         ldah    $2,foo($29)                     !tprelhi
2790         lda     $3,foo($2)                      !tprello
2791         lda     $4,foo($29)                     !tprel'
2792         tls_first_major=2
2793         tls_first_minor=13
2794         tls_as_opt=--fatal-warnings
2795         ;;
2796   cris-*-*|crisv32-*-*)
2797     conftest_s='
2798         .section ".tdata","awT",@progbits
2799 x:      .long   25
2800         .text
2801         move.d x:IE,$r10
2802         nop'
2803         tls_first_major=2
2804         tls_first_minor=20
2805         tls_as_opt=--fatal-warnings
2806         ;;
2807   frv*-*-*)
2808     conftest_s='
2809         .section ".tdata","awT",@progbits
2810 x:      .long   25
2811         .text
2812         call    #gettlsoff(x)'
2813         tls_first_major=2
2814         tls_first_minor=14
2815         ;;
2816   hppa*-*-linux*)
2817     conftest_s='
2818 t1:     .reg    %r20
2819 t2:     .reg    %r21
2820 gp:     .reg    %r19
2821         .section ".tdata","awT",@progbits
2822 foo:    .long   25
2823         .text
2824         .align  4
2825         addil LT%foo-$tls_gdidx$,gp
2826         ldo RT%foo-$tls_gdidx$(%r1),%arg0
2827         b __tls_get_addr
2828         nop
2829         addil LT%foo-$tls_ldidx$,gp
2830         b __tls_get_addr
2831         ldo RT%foo-$tls_ldidx$(%r1),%arg0
2832         addil LR%foo-$tls_dtpoff$,%ret0
2833         ldo RR%foo-$tls_dtpoff$(%r1),%t1
2834         mfctl %cr27,%t1
2835         addil LT%foo-$tls_ieoff$,gp
2836         ldw RT%foo-$tls_ieoff$(%r1),%t2
2837         add %t1,%t2,%t3
2838         mfctl %cr27,%t1
2839         addil LR%foo-$tls_leoff$,%t1
2840         ldo RR%foo-$tls_leoff$(%r1),%t2'
2841         tls_first_major=2
2842         tls_first_minor=15
2843         tls_as_opt=--fatal-warnings
2844         ;;
2845   arm*-*-*)
2846     conftest_s='
2847         .section ".tdata","awT",%progbits
2848 foo:    .long   25
2849         .text
2850 .word foo(gottpoff)
2851 .word foo(tpoff)
2852 .word foo(tlsgd)
2853 .word foo(tlsldm)
2854 .word foo(tlsldo)'
2855         tls_first_major=2
2856         tls_first_minor=17
2857         ;;
2858   i[34567]86-*-* | x86_64-*-solaris2.1[0-9]*)
2859     case "$target" in
2860       i[34567]86-*-solaris2.*)
2861         on_solaris=yes
2862         tga_func=___tls_get_addr
2863         ;;
2864       x86_64-*-solaris2.1[0-9]*)
2865         on_solaris=yes
2866         tga_func=__tls_get_addr
2867         ;;
2868       *)
2869         on_solaris=no
2870         ;;
2871     esac
2872     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2873       conftest_s='
2874         .section .tdata,"awt",@progbits'
2875       tls_first_major=0
2876       tls_first_minor=0
2877 changequote([,])dnl
2878       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
2879 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
2880 changequote(,)dnl
2881     else
2882       conftest_s='
2883         .section ".tdata","awT",@progbits'
2884       tls_first_major=2
2885       tls_first_minor=14
2886       tls_as_opt="--fatal-warnings"
2887     fi
2888     conftest_s="$conftest_s
2889 foo:    .long   25
2890         .text
2891         movl    %gs:0, %eax
2892         leal    foo@tlsgd(,%ebx,1), %eax
2893         leal    foo@tlsldm(%ebx), %eax
2894         leal    foo@dtpoff(%eax), %edx
2895         movl    foo@gottpoff(%ebx), %eax
2896         subl    foo@gottpoff(%ebx), %eax
2897         addl    foo@gotntpoff(%ebx), %eax
2898         movl    foo@indntpoff, %eax
2899         movl    \$foo@tpoff, %eax
2900         subl    \$foo@tpoff, %eax
2901         leal    foo@ntpoff(%ecx), %eax"
2902     ;;
2903   x86_64-*-*)
2904     conftest_s='
2905         .section ".tdata","awT",@progbits
2906 foo:    .long   25
2907         .text
2908         movq    %fs:0, %rax
2909         leaq    foo@TLSGD(%rip), %rdi
2910         leaq    foo@TLSLD(%rip), %rdi
2911         leaq    foo@DTPOFF(%rax), %rdx
2912         movq    foo@GOTTPOFF(%rip), %rax
2913         movq    $foo@TPOFF, %rax'
2914         tls_first_major=2
2915         tls_first_minor=14
2916         tls_as_opt=--fatal-warnings
2917         ;;
2918   ia64-*-*)
2919     conftest_s='
2920         .section ".tdata","awT",@progbits
2921 foo:    data8   25
2922         .text
2923         addl    r16 = @ltoff(@dtpmod(foo#)), gp
2924         addl    r17 = @ltoff(@dtprel(foo#)), gp
2925         addl    r18 = @ltoff(@tprel(foo#)), gp
2926         addl    r19 = @dtprel(foo#), gp
2927         adds    r21 = @dtprel(foo#), r13
2928         movl    r23 = @dtprel(foo#)
2929         addl    r20 = @tprel(foo#), gp
2930         adds    r22 = @tprel(foo#), r13
2931         movl    r24 = @tprel(foo#)'
2932         tls_first_major=2
2933         tls_first_minor=13
2934         tls_as_opt=--fatal-warnings
2935         ;;
2936   mips*-*-*)
2937     conftest_s='
2938         .section .tdata,"awT",@progbits
2939 x:
2940         .word 2
2941         .text
2942         addiu $4, $28, %tlsgd(x)
2943         addiu $4, $28, %tlsldm(x)
2944         lui $4, %dtprel_hi(x)
2945         addiu $4, $4, %dtprel_lo(x)
2946         lw $4, %gottprel(x)($28)
2947         lui $4, %tprel_hi(x)
2948         addiu $4, $4, %tprel_lo(x)'
2949         tls_first_major=2
2950         tls_first_minor=16
2951         tls_as_opt='-32 --fatal-warnings'
2952         ;;
2953   m68k-*-*)
2954     conftest_s='
2955         .section .tdata,"awT",@progbits
2956 x:
2957         .word 2
2958         .text
2959 foo:
2960         move.l x@TLSGD(%a5),%a0
2961         move.l x@TLSLDM(%a5),%a0
2962         move.l x@TLSLDO(%a5),%a0
2963         move.l x@TLSIE(%a5),%a0
2964         move.l x@TLSLE(%a5),%a0'
2965         tls_first_major=2
2966         tls_first_minor=19
2967         tls_as_opt='--fatal-warnings'
2968         ;;
2969   powerpc-*-*)
2970     conftest_s='
2971         .section ".tdata","awT",@progbits
2972         .align 2
2973 ld0:    .space 4
2974 ld1:    .space 4
2975 x1:     .space 4
2976 x2:     .space 4
2977 x3:     .space 4
2978         .text
2979         addi 3,31,ld0@got@tlsgd
2980         bl __tls_get_addr
2981         addi 3,31,x1@got@tlsld
2982         bl __tls_get_addr
2983         addi 9,3,x1@dtprel
2984         addis 9,3,x2@dtprel@ha
2985         addi 9,9,x2@dtprel@l
2986         lwz 9,x3@got@tprel(31)
2987         add 9,9,x@tls
2988         addi 9,2,x1@tprel
2989         addis 9,2,x2@tprel@ha
2990         addi 9,9,x2@tprel@l'
2991         tls_first_major=2
2992         tls_first_minor=14
2993         tls_as_opt="-a32 --fatal-warnings"
2994         ;;
2995   powerpc64-*-*)
2996     conftest_s='
2997         .section ".tdata","awT",@progbits
2998         .align 3
2999 ld0:    .space 8
3000 ld1:    .space 8
3001 x1:     .space 8
3002 x2:     .space 8
3003 x3:     .space 8
3004         .text
3005         addi 3,2,ld0@got@tlsgd
3006         bl .__tls_get_addr
3007         nop
3008         addi 3,2,ld1@toc
3009         bl .__tls_get_addr
3010         nop
3011         addi 3,2,x1@got@tlsld
3012         bl .__tls_get_addr
3013         nop
3014         addi 9,3,x1@dtprel
3015         bl .__tls_get_addr
3016         nop
3017         addis 9,3,x2@dtprel@ha
3018         addi 9,9,x2@dtprel@l
3019         bl .__tls_get_addr
3020         nop
3021         ld 9,x3@got@dtprel(2)
3022         add 9,9,3
3023         bl .__tls_get_addr
3024         nop'
3025         tls_first_major=2
3026         tls_first_minor=14
3027         tls_as_opt="-a64 --fatal-warnings"
3028         ;;
3029   s390-*-*)
3030     conftest_s='
3031         .section ".tdata","awT",@progbits
3032 foo:    .long   25
3033         .text
3034         .long   foo@TLSGD
3035         .long   foo@TLSLDM
3036         .long   foo@DTPOFF
3037         .long   foo@NTPOFF
3038         .long   foo@GOTNTPOFF
3039         .long   foo@INDNTPOFF
3040         l       %r1,foo@GOTNTPOFF(%r12)
3041         l       %r1,0(%r1):tls_load:foo
3042         bas     %r14,0(%r1,%r13):tls_gdcall:foo
3043         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
3044         tls_first_major=2
3045         tls_first_minor=14
3046         tls_as_opt="-m31 --fatal-warnings"
3047         ;;
3048   s390x-*-*)
3049     conftest_s='
3050         .section ".tdata","awT",@progbits
3051 foo:    .long   25
3052         .text
3053         .quad   foo@TLSGD
3054         .quad   foo@TLSLDM
3055         .quad   foo@DTPOFF
3056         .quad   foo@NTPOFF
3057         .quad   foo@GOTNTPOFF
3058         lg      %r1,foo@GOTNTPOFF(%r12)
3059         larl    %r1,foo@INDNTPOFF
3060         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
3061         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
3062         tls_first_major=2
3063         tls_first_minor=14
3064         tls_as_opt="-m64 -Aesame --fatal-warnings"
3065         ;;
3066   sh-*-* | sh[34]-*-*)
3067     conftest_s='
3068         .section ".tdata","awT",@progbits
3069 foo:    .long   25
3070         .text
3071         .long   foo@TLSGD
3072         .long   foo@TLSLDM
3073         .long   foo@DTPOFF
3074         .long   foo@GOTTPOFF
3075         .long   foo@TPOFF'
3076         tls_first_major=2
3077         tls_first_minor=13
3078         tls_as_opt=--fatal-warnings
3079         ;;
3080   sparc*-*-*)
3081     case "$target" in
3082       sparc*-sun-solaris2.*)
3083         on_solaris=yes
3084         tga_func=__tls_get_addr
3085         ;;
3086       *)
3087         on_solaris=no
3088         ;;
3089     esac
3090     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3091       conftest_s='
3092         .section ".tdata",#alloc,#write,#tls'
3093         tls_first_major=0
3094         tls_first_minor=0
3095     else
3096       conftest_s='
3097         .section ".tdata","awT",@progbits'
3098         tls_first_major=2
3099         tls_first_minor=14
3100         tls_as_opt="-32 --fatal-warnings"
3101     fi
3102     conftest_s="$conftest_s
3103 foo:    .long   25
3104         .text
3105         sethi   %tgd_hi22(foo), %o0
3106         add     %o0, %tgd_lo10(foo), %o1
3107         add     %l7, %o1, %o0, %tgd_add(foo)
3108         call    __tls_get_addr, %tgd_call(foo)
3109         sethi   %tldm_hi22(foo), %l1
3110         add     %l1, %tldm_lo10(foo), %l2
3111         add     %l7, %l2, %o0, %tldm_add(foo)
3112         call    __tls_get_addr, %tldm_call(foo)
3113         sethi   %tldo_hix22(foo), %l3
3114         xor     %l3, %tldo_lox10(foo), %l4
3115         add     %o0, %l4, %l5, %tldo_add(foo)
3116         sethi   %tie_hi22(foo), %o3
3117         add     %o3, %tie_lo10(foo), %o3
3118         ld      [%l7 + %o3], %o2, %tie_ld(foo)
3119         add     %g7, %o2, %o4, %tie_add(foo)
3120         sethi   %tle_hix22(foo), %l1
3121         xor     %l1, %tle_lox10(foo), %o5
3122         ld      [%g7 + %o5], %o1"
3123         ;;
3124   tilepro*-*-*)
3125       conftest_s='
3126         .section ".tdata","awT",@progbits
3127 foo:    .long   25
3128         .text
3129         addli   r0, zero, tls_gd(foo)
3130         auli    r0, zero, tls_gd_ha16(foo)
3131         addli   r0, r0, tls_gd_lo16(foo)
3132         jal     __tls_get_addr
3133         addli   r0, zero, tls_ie(foo)
3134         auli    r0, r0, tls_ie_ha16(foo)
3135         addli   r0, r0, tls_ie_lo16(foo)'
3136         tls_first_major=2
3137         tls_first_minor=22
3138         tls_as_opt="--fatal-warnings"
3139         ;;
3140   tilegx*-*-*)
3141       conftest_s='
3142         .section ".tdata","awT",@progbits
3143 foo:    .long   25
3144         .text
3145         shl16insli r0, zero, hw0_last_tls_gd(foo)
3146         shl16insli r0, zero, hw1_last_tls_gd(foo)
3147         shl16insli r0, r0,   hw0_tls_gd(foo)
3148         jal        __tls_get_addr
3149         shl16insli r0, zero, hw1_last_tls_ie(foo)
3150         shl16insli r0, r0,   hw0_tls_ie(foo)'
3151         tls_first_major=2
3152         tls_first_minor=22
3153         tls_as_opt="--fatal-warnings"
3154         ;;
3155   xtensa*-*-*)
3156     conftest_s='
3157         .section ".tdata","awT",@progbits
3158 foo:    .long   25
3159         .text
3160         movi    a8, foo@TLSFUNC
3161         movi    a10, foo@TLSARG
3162         callx8.tls a8, foo@TLSCALL'
3163         tls_first_major=2
3164         tls_first_minor=19
3165         ;;
3166 changequote([,])dnl
3167 esac
3168 set_have_as_tls=no
3169 if test "x$enable_tls" = xno ; then
3170   : # TLS explicitly disabled.
3171 elif test "x$enable_tls" = xyes ; then
3172   set_have_as_tls=yes # TLS explicitly enabled.
3173 elif test -z "$tls_first_major"; then
3174   : # If we don't have a check, assume no support.
3175 else
3176   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3177   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3178   [set_have_as_tls=yes])
3179 fi
3180 case "$target" in
3181   *-*-irix6*)
3182     # IRIX 6.5 rld and libc.so lack TLS support, so even if gas and gld
3183     # with TLS support are in use, native TLS cannot work.
3184     set_have_as_tls=no
3185     ;;
3186   # TLS was introduced in the Solaris 9 FCS release and backported to
3187   # Solaris 8 patches.  Support for GNU-style TLS on x86 was only
3188   # introduced in Solaris 9 4/04, replacing the earlier Sun style that Sun
3189   # ld and GCC don't support any longer.
3190   *-*-solaris2.*)
3191     AC_MSG_CHECKING(linker and ld.so.1 TLS support)
3192     ld_tls_support=no
3193     # Check ld and ld.so.1 TLS support.
3194     if echo "$ld_ver" | grep GNU > /dev/null; then
3195       # Assume all interesting versions of GNU ld have TLS support.
3196       # FIXME: still need ld.so.1 support, i.e. ld version checks below.
3197       ld_tls_support=yes
3198     else
3199       case "$target" in
3200         # Solaris 8/x86 ld has GNU style TLS support since version 1.280.
3201         i?86-*-solaris2.8)
3202           min_tls_ld_vers_minor=280
3203           ;;
3204         # Solaris 8/SPARC ld has TLS support since version 1.272.
3205         sparc*-*-solaris2.8)
3206           min_tls_ld_vers_minor=272
3207           ;;
3208         # Solaris 9/x86 ld has GNU style TLS support since version 1.374.
3209         i?86-*-solaris2.9)
3210           min_tls_ld_vers_minor=374
3211           ;;
3212         # Solaris 9/SPARC and Solaris 10+ ld have TLS support since FCS.
3213         sparc*-*-solaris2.9 | *-*-solaris2.1[[0-9]]*)
3214           min_tls_ld_vers_minor=343
3215           ;;
3216       esac
3217       if test "$ld_vers_major" -gt 1 || \
3218         test "$ld_vers_minor" -ge "$min_tls_ld_vers_minor"; then
3219         ld_tls_support=yes
3220       else
3221         set_have_as_tls=no
3222       fi
3223     fi
3224     AC_MSG_RESULT($ld_tls_support)
3225
3226     save_LIBS="$LIBS"
3227     save_LDFLAGS="$LDFLAGS"
3228     LIBS=
3229     LDFLAGS=
3230
3231     AC_MSG_CHECKING(alternate thread library)
3232     case "$target" in
3233       # TLS support was backported to Solaris 8 patches, but only lives in
3234       # the alternate thread library which became the default in Solaris 9.
3235       # We want to always use that, irrespective of TLS support.
3236       *-*-solaris2.8)
3237         # Take multilib subdir into account.  There's no spec to handle
3238         # this.  The 64 symlink exists since Solaris 8.
3239         lwp_dir=/usr/lib/lwp
3240         lwp_spec="-L$lwp_dir%{m64:/64} -R$lwp_dir%{m64:/64}"
3241         LDFLAGS="-L$lwp_dir -R$lwp_dir"
3242         ;;
3243       *-*-solaris2*)
3244         lwp_dir="none"
3245         lwp_spec=""
3246         ;;
3247     esac
3248     # Always define LIB_THREAD_LDFLAGS_SPEC, even without TLS support.
3249     AC_DEFINE_UNQUOTED(LIB_THREAD_LDFLAGS_SPEC, "$lwp_spec",
3250         [Define to the linker flags to use for -pthread.])
3251     AC_MSG_RESULT($lwp_dir)
3252
3253     AC_MSG_CHECKING(library containing $tga_func)
3254     # Before Solaris 10, __tls_get_addr (SPARC/x64) resp. ___tls_get_addr
3255     # (32-bit x86) only lived in libthread, so check for that.  Keep
3256     # set_have_as_tls if found, disable if not.
3257     AC_SEARCH_LIBS([$tga_func], [thread],, [set_have_as_tls=no])
3258     # Clear LIBS if we cannot support TLS.
3259     if test $set_have_as_tls = no; then
3260       LIBS=
3261     fi
3262     # Even without TLS support on Solaris 8, explicitly link with libthread
3263     # to guarantee that the alternate thread library is used.
3264     case "$target" in
3265       *-*-solaris2.8)
3266         LIBS=-lthread
3267         ;;
3268     esac
3269     # Always define LIB_TLS_SPEC, even without TLS support.
3270     AC_DEFINE_UNQUOTED(LIB_TLS_SPEC, "$LIBS",
3271         [Define to the library containing __tls_get_addr/___tls_get_addr.])
3272     AC_MSG_RESULT($LIBS)
3273
3274     LIBS="$save_LIBS"
3275     LDFLAGS="$save_LDFLAGS"
3276     ;;
3277 esac
3278 if test $set_have_as_tls = yes ; then
3279   AC_DEFINE(HAVE_AS_TLS, 1,
3280             [Define if your assembler and linker support thread-local storage.])
3281 fi
3282
3283 # Target-specific assembler checks.
3284
3285 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3286 gcc_cv_ld_static_dynamic=no
3287 gcc_cv_ld_static_option='-Bstatic'
3288 gcc_cv_ld_dynamic_option='-Bdynamic'
3289 if test $in_tree_ld = yes ; then
3290   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3291     gcc_cv_ld_static_dynamic=yes
3292   fi
3293 elif test x$gcc_cv_ld != x; then
3294   # Check if linker supports -Bstatic/-Bdynamic option
3295   if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3296      && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3297       gcc_cv_ld_static_dynamic=yes
3298   else
3299     case "$target" in
3300       # HP-UX ld uses -a flags to select between shared and archive.
3301       *-*-hpux*)
3302         if test x"$gnu_ld" = xno; then
3303           gcc_cv_ld_static_dynamic=yes
3304           gcc_cv_ld_static_option="-aarchive_shared"
3305           gcc_cv_ld_dynamic_option="-adefault"
3306         fi
3307         ;;
3308       # IRIX 6 ld supports -Bstatic/-Bdynamic.
3309       mips-sgi-irix6*)
3310         gcc_cv_ld_static_dynamic=yes
3311         ;;
3312       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3313       *-*-solaris2*)
3314         gcc_cv_ld_static_dynamic=yes
3315         ;;
3316     esac
3317   fi
3318 fi
3319 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3320         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3321 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3322         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3323 [Define to the linker option to disable use of shared objects.])
3324         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3325 [Define to the linker option to enable use of shared objects.])
3326 fi
3327 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3328
3329 if test x"$demangler_in_ld" = xyes; then
3330   AC_MSG_CHECKING(linker --demangle support)
3331   gcc_cv_ld_demangle=no
3332   if test $in_tree_ld = yes; then
3333     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3334       gcc_cv_ld_demangle=yes
3335     fi
3336   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3337     # Check if the GNU linker supports --demangle option
3338     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3339       gcc_cv_ld_demangle=yes
3340     fi
3341   fi
3342   if test x"$gcc_cv_ld_demangle" = xyes; then
3343     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3344 [Define if your linker supports --demangle option.])
3345   fi
3346   AC_MSG_RESULT($gcc_cv_ld_demangle)
3347 fi
3348
3349 AC_MSG_CHECKING(linker plugin support)
3350 gcc_cv_lto_plugin=0
3351 if test -f liblto_plugin.la; then
3352   save_ld_ver="$ld_ver"
3353   save_ld_vers_major="$ld_vers_major"
3354   save_ld_vers_minor="$ld_vers_minor"
3355   save_ld_is_gold="$ld_is_gold"
3356
3357   ld_is_gold=no
3358
3359   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
3360     ld_ver="GNU ld"
3361     # FIXME: ld_is_gold?
3362     ld_vers_major="$gcc_cv_gld_major_version"
3363     ld_vers_minor="$gcc_cv_gld_minor_version"
3364   else
3365     # Determine plugin linker version.
3366     # FIXME: Partial duplicate from above, generalize.
3367 changequote(,)dnl
3368     ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
3369     if echo "$ld_ver" | grep GNU > /dev/null; then
3370       if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
3371         ld_is_gold=yes
3372         ld_vers=`echo $ld_ver | sed -n \
3373             -e 's,^[^)]*[        ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3374       else
3375         ld_vers=`echo $ld_ver | sed -n \
3376             -e 's,^.*[   ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3377       fi
3378       ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3379       ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3380     fi
3381 changequote([,])dnl
3382   fi
3383
3384   # Determine plugin support.
3385   if echo "$ld_ver" | grep GNU > /dev/null; then
3386     # Require GNU ld or gold 2.21+ for plugin support by default.
3387     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
3388       gcc_cv_lto_plugin=2
3389     # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
3390     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
3391       gcc_cv_lto_plugin=1
3392     fi
3393   fi
3394
3395   ld_ver="$save_ld_ver"
3396   ld_vers_major="$save_ld_vers_major"
3397   ld_vers_minor="$save_ld_vers_minor"
3398   ld_is_gold="$save_ld_is_gold"
3399 fi
3400 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
3401   [Define to the level of your linker's plugin support.])
3402 AC_MSG_RESULT($gcc_cv_lto_plugin)
3403
3404 case "$target" in
3405   # All TARGET_ABI_OSF targets.
3406   alpha*-*-linux* | alpha*-*-*bsd*)
3407     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3408         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3409 [       .set nomacro
3410         .text
3411         extbl   $3, $2, $3      !lituse_bytoff!1
3412         ldq     $2, a($29)      !literal!1
3413         ldq     $4, b($29)      !literal!2
3414         ldq_u   $3, 0($2)       !lituse_base!1
3415         ldq     $27, f($29)     !literal!5
3416         jsr     $26, ($27), f   !lituse_jsr!5
3417         ldah    $29, 0($26)     !gpdisp!3
3418         lda     $0, c($29)      !gprel
3419         ldah    $1, d($29)      !gprelhigh
3420         lda     $1, d($1)       !gprellow
3421         lda     $29, 0($29)     !gpdisp!3],,
3422     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3423   [Define if your assembler supports explicit relocations.])])
3424     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3425         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3426 [       .set nomacro
3427         .text
3428         ldq     $27, a($29)     !literal!1
3429         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3430     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3431   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3432     ;;
3433
3434   cris-*-*)
3435     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3436       gcc_cv_as_cris_no_mul_bug,[2,15,91],
3437       [-no-mul-bug-abort], [.text],,
3438       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3439                 [Define if your assembler supports the -no-mul-bug-abort option.])])
3440     ;;
3441
3442   sparc*-*-*)
3443     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3444       [.register %g2, #scratch],,
3445       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3446                 [Define if your assembler supports .register.])])
3447
3448     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3449       [-relax], [.text],,
3450       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3451                 [Define if your assembler supports -relax option.])])
3452
3453     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3454       gcc_cv_as_sparc_gotdata_op,,
3455       [-K PIC],
3456 [.text
3457 .align 4
3458 foo:
3459         nop
3460 bar:
3461         sethi %gdop_hix22(foo), %g1
3462         xor    %g1, %gdop_lox10(foo), %g1
3463         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3464       [if test x$gcc_cv_ld != x \
3465        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3466          if test x$gcc_cv_objdump != x; then
3467            if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3468               | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3469                gcc_cv_as_sparc_gotdata_op=no
3470            else
3471                gcc_cv_as_sparc_gotdata_op=yes
3472            fi
3473          fi
3474        fi
3475        rm -f conftest],
3476       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3477                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3478
3479     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3480       gcc_cv_as_sparc_ua_pcrel,,
3481       [-K PIC],
3482 [.text
3483 foo:
3484         nop
3485 .data
3486 .align 4
3487 .byte 0
3488 .uaword %r_disp32(foo)],
3489       [if test x$gcc_cv_ld != x \
3490        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3491          gcc_cv_as_sparc_ua_pcrel=yes
3492        fi
3493        rm -f conftest],
3494       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3495                 [Define if your assembler and linker support unaligned PC relative relocs.])
3496
3497       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3498         gcc_cv_as_sparc_ua_pcrel_hidden,,
3499         [-K PIC],
3500 [.data
3501 .align 4
3502 .byte 0x31
3503 .uaword %r_disp32(foo)
3504 .byte 0x32, 0x33, 0x34
3505 .global foo
3506 .hidden foo
3507 foo:
3508 .skip 4],
3509         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3510          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3511          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3512             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3513             if $gcc_cv_objdump -R conftest 2> /dev/null \
3514                | grep 'DISP32' > /dev/null 2>&1; then
3515                 :
3516             else
3517                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3518             fi
3519          fi
3520          rm -f conftest],
3521          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3522                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3523     ]) # unaligned pcrel relocs
3524
3525     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3526       gcc_cv_as_sparc_offsetable_lo10,,
3527       [-xarch=v9],
3528 [.text
3529         or %g1, %lo(ab) + 12, %g1
3530         or %g1, %lo(ab + 12), %g1],
3531       [if test x$gcc_cv_objdump != x \
3532        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3533           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3534          gcc_cv_as_sparc_offsetable_lo10=yes
3535        fi],
3536        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3537                  [Define if your assembler supports offsetable %lo().])])
3538
3539     gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
3540       gcc_cv_as_sparc_fmaf,,
3541       [-xarch=v9d],
3542       [.text
3543        .register %g2, #scratch
3544        .register %g3, #scratch
3545        .align 4
3546        fmaddd %f0, %f2, %f4, %f6
3547        addxccc %g1, %g2, %g3
3548        fsrl32 %f2, %f4, %f8
3549        fnaddd %f10, %f12, %f14],,
3550       [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
3551                 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
3552     ;;
3553
3554 changequote(,)dnl
3555   i[34567]86-*-* | x86_64-*-*)
3556 changequote([,])dnl
3557     case $target_os in
3558       cygwin*)
3559         # Full C++ conformance when using a shared libstdc++-v3 requires some
3560         # support from the Cygwin DLL, which in more recent versions exports
3561         # wrappers to aid in interposing and redirecting operators new, delete,
3562         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
3563         # are configuring for a version of Cygwin that exports the wrappers.
3564         if test x$host = x$target; then
3565           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3566         else
3567           # Can't check presence of libc functions during cross-compile, so
3568           # we just have to assume we're building for an up-to-date target.
3569           gcc_ac_cygwin_dll_wrappers=yes
3570         fi
3571         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3572           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3573           [Define if you want to generate code by default that assumes that the
3574            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3575     esac
3576     case $target_os in
3577       cygwin* | pe | mingw32* | interix*)
3578         # Recent binutils allows the three-operand form of ".comm" on PE.  This
3579         # definition is used unconditionally to initialise the default state of
3580         # the target option variable that governs usage of the feature.
3581         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3582          [2,19,52],,[.comm foo,1,32])
3583         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3584           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3585           [Define if your assembler supports specifying the alignment
3586            of objects allocated using the GAS .comm command.])
3587         # Used for DWARF 2 in PE
3588         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3589           gcc_cv_as_ix86_pe_secrel32,
3590           [2,15,91],,
3591 [.text
3592 foo:    nop
3593 .data
3594         .secrel32 foo],
3595           [if test x$gcc_cv_ld != x \
3596            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3597              gcc_cv_as_ix86_pe_secrel32=yes
3598            fi
3599            rm -f conftest],
3600           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3601             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3602         # Test if the assembler supports the extended form of the .section
3603         # directive that specifies section alignment.  LTO support uses this,
3604         # but normally only after installation, so we warn but don't fail the
3605         # configure if LTO is enabled but the assembler does not support it.
3606         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
3607           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
3608         if test x$gcc_cv_as_section_has_align != xyes; then
3609           case ",$enable_languages," in
3610             *,lto,*)
3611               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
3612               ;;
3613           esac
3614         fi
3615         # Test if the assembler supports the section flag 'e' for specifying
3616         # an excluded section.
3617         gcc_GAS_CHECK_FEATURE([.section with e], gcc_cv_as_section_has_e,
3618           [2,22,51],,
3619 [.section foo1,"e"
3620 .byte 0,0,0,0])
3621         AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
3622           [`if test $gcc_cv_as_section_has_e = yes; then echo 1; else echo 0; fi`],
3623           [Define if your assembler supports specifying the section flag e.])
3624         ;;
3625     esac
3626
3627     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3628        gcc_cv_as_ix86_filds,,,
3629        [filds mem; fists mem],,
3630        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3631          [Define if your assembler uses filds and fists mnemonics.])])
3632
3633     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3634        gcc_cv_as_ix86_fildq,,,
3635        [fildq mem; fistpq mem],,
3636        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3637          [Define if your assembler uses fildq and fistq mnemonics.])])
3638
3639     gcc_GAS_CHECK_FEATURE([cmov syntax],
3640       gcc_cv_as_ix86_cmov_sun_syntax,,,
3641       [cmovl.l %edx, %eax],,
3642       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3643         [Define if your assembler supports the Sun syntax for cmov.])])
3644
3645     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3646       gcc_cv_as_ix86_ffreep,,,
3647       [ffreep %st(1)],,
3648       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3649         [Define if your assembler supports the ffreep mnemonic.])])
3650
3651     gcc_GAS_CHECK_FEATURE([.quad directive],
3652       gcc_cv_as_ix86_quad,,,
3653       [.quad 0],,
3654       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
3655         [Define if your assembler supports the .quad directive.])])
3656
3657     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3658       gcc_cv_as_ix86_sahf,,,
3659       [.code64
3660        sahf],,
3661       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3662         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
3663
3664     gcc_GAS_CHECK_FEATURE([swap suffix],
3665       gcc_cv_as_ix86_swap,,,
3666       [movl.s %esp, %ebp],,
3667       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3668         [Define if your assembler supports the swap suffix.])])
3669
3670     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3671       gcc_cv_as_ix86_diff_sect_delta,,,
3672       [.section .rodata
3673 .L1:
3674         .long .L2-.L1
3675         .long .L3-.L1
3676         .text
3677 .L3:    nop
3678 .L2:    nop],,
3679       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3680         [Define if your assembler supports the subtraction of symbols in different sections.])])
3681
3682     # These two are used unconditionally by i386.[ch]; it is to be defined
3683     # to 1 if the feature is present, 0 otherwise.
3684     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3685         gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
3686 [       .text
3687 .L0:
3688         nop
3689         .data
3690         .long .L0@GOTOFF])
3691     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3692       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3693       [Define true if the assembler supports '.long foo@GOTOFF'.])
3694
3695     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
3696         gcc_cv_as_ix86_rep_lock_prefix,,,
3697         [rep movsl
3698          lock addl %edi, (%eax,%esi)
3699          lock orl $0, (%esp)],,
3700         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
3701           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
3702
3703     gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
3704         gcc_cv_as_ix86_tlsgdplt,,,
3705         [call    tls_gd@tlsgdplt],
3706         [if test x$gcc_cv_ld != x \
3707          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3708            gcc_cv_as_ix86_tlsgdplt=yes
3709          fi
3710          rm -f conftest],
3711       [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
3712         [Define if your assembler and linker support @tlsgdplt.])])
3713
3714     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
3715         gcc_cv_as_ix86_tlsldmplt,,,
3716         [tls_ld:
3717          call    tls_ld@tlsldmplt],
3718         [if test x$gcc_cv_ld != x \
3719          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3720            gcc_cv_as_ix86_tlsldmplt=yes
3721          fi
3722          rm -f conftest],
3723       [AC_DEFINE(HAVE_AS_IX86_TLSLDMPLT, 1,
3724         [Define if your assembler and linker support @tlsldmplt.])])
3725
3726     ;;
3727
3728   ia64*-*-*)
3729     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3730         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3731 [       .text
3732         addl r15 = @ltoffx(x#), gp
3733         ;;
3734         ld8.mov r16 = [[r15]], x#],,
3735     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3736           [Define if your assembler supports ltoffx and ldxmov relocations.])])
3737
3738     ;;
3739
3740   powerpc*-*-*)
3741     case $target in
3742       *-*-aix*) conftest_s='    .machine "pwr5"
3743         .csect .text[[PR]]
3744         mfcr 3,128';;
3745       *-*-darwin*)
3746         gcc_GAS_CHECK_FEATURE([.machine directive support],
3747           gcc_cv_as_machine_directive,,,
3748           [     .machine ppc7400])
3749         if test x$gcc_cv_as_machine_directive != xyes; then
3750           echo "*** This target requires an assembler supporting \".machine\"" >&2
3751           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
3752           test x$build = x$target && exit 1
3753         fi
3754         conftest_s='    .text
3755         mfcr r3,128';;
3756       *) conftest_s='   .machine power4
3757         .text
3758         mfcr 3,128';;
3759     esac
3760
3761     gcc_GAS_CHECK_FEATURE([mfcr field support],
3762       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
3763       [$conftest_s],,
3764       [AC_DEFINE(HAVE_AS_MFCRF, 1,
3765           [Define if your assembler supports mfcr field.])])
3766
3767     case $target in
3768       *-*-aix*) conftest_s='    .machine "pwr5"
3769         .csect .text[[PR]]
3770         popcntb 3,3';;
3771       *) conftest_s='   .machine power5
3772         .text
3773         popcntb 3,3';;
3774     esac
3775
3776     gcc_GAS_CHECK_FEATURE([popcntb support],
3777       gcc_cv_as_powerpc_popcntb, [2,17,0],,
3778       [$conftest_s],,
3779       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
3780           [Define if your assembler supports popcntb field.])])
3781
3782     case $target in
3783       *-*-aix*) conftest_s='    .machine "pwr5x"
3784         .csect .text[[PR]]
3785         frin 1,1';;
3786       *) conftest_s='   .machine power5
3787         .text
3788         frin 1,1';;
3789     esac
3790
3791     gcc_GAS_CHECK_FEATURE([fp round support],
3792       gcc_cv_as_powerpc_fprnd, [2,17,0],,
3793       [$conftest_s],,
3794       [AC_DEFINE(HAVE_AS_FPRND, 1,
3795           [Define if your assembler supports fprnd.])])
3796
3797     case $target in
3798       *-*-aix*) conftest_s='    .machine "pwr6"
3799         .csect .text[[PR]]
3800         mffgpr 1,3';;
3801       *) conftest_s='   .machine power6
3802         .text
3803         mffgpr 1,3';;
3804     esac
3805
3806     gcc_GAS_CHECK_FEATURE([move fp gpr support],
3807       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
3808       [$conftest_s],,
3809       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
3810           [Define if your assembler supports mffgpr and mftgpr.])])
3811
3812     case $target in
3813       *-*-aix*) conftest_s='    .csect .text[[PR]]
3814 LCF..0:
3815         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
3816       *-*-darwin*)
3817         conftest_s='    .text
3818 LCF0:
3819         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
3820       *) conftest_s='   .text
3821 .LCF0:
3822         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
3823     esac
3824
3825     gcc_GAS_CHECK_FEATURE([rel16 relocs],
3826       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
3827       [$conftest_s],,
3828       [AC_DEFINE(HAVE_AS_REL16, 1,
3829           [Define if your assembler supports R_PPC_REL16 relocs.])])
3830
3831     case $target in
3832       *-*-aix*) conftest_s='    .machine "pwr6"
3833         .csect .text[[PR]]
3834         cmpb 3,4,5';;
3835       *) conftest_s='   .machine power6
3836         .text
3837         cmpb 3,4,5';;
3838     esac
3839
3840     gcc_GAS_CHECK_FEATURE([compare bytes support],
3841       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
3842       [$conftest_s],,
3843       [AC_DEFINE(HAVE_AS_CMPB, 1,
3844           [Define if your assembler supports cmpb.])])
3845
3846     case $target in
3847       *-*-aix*) conftest_s='    .machine "pwr6"
3848         .csect .text[[PR]]
3849         dadd 1,2,3';;
3850       *) conftest_s='   .machine power6
3851         .text
3852         dadd 1,2,3';;
3853     esac
3854
3855     gcc_GAS_CHECK_FEATURE([decimal float support],
3856       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
3857       [$conftest_s],,
3858       [AC_DEFINE(HAVE_AS_DFP, 1,
3859           [Define if your assembler supports DFP instructions.])])
3860
3861     case $target in
3862       *-*-aix*) conftest_s='    .machine "pwr7"
3863         .csect .text[[PR]]
3864         lxvd2x 1,2,3';;
3865       *) conftest_s='   .machine power7
3866         .text
3867         lxvd2x 1,2,3';;
3868     esac
3869
3870     gcc_GAS_CHECK_FEATURE([vector-scalar support],
3871       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
3872       [$conftest_s],,
3873       [AC_DEFINE(HAVE_AS_VSX, 1,
3874           [Define if your assembler supports VSX instructions.])])
3875
3876     case $target in
3877       *-*-aix*) conftest_s='    .machine "pwr7"
3878         .csect .text[[PR]]
3879         popcntd 3,3';;
3880       *) conftest_s='   .machine power7
3881         .text
3882         popcntd 3,3';;
3883     esac
3884
3885     gcc_GAS_CHECK_FEATURE([popcntd support],
3886       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
3887       [$conftest_s],,
3888       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
3889           [Define if your assembler supports POPCNTD instructions.])])
3890
3891     case $target in
3892       *-*-aix*) conftest_s='    .csect .text[[PR]]
3893         lwsync';;
3894       *) conftest_s='   .text
3895         lwsync';;
3896     esac
3897
3898     gcc_GAS_CHECK_FEATURE([lwsync support],
3899       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
3900       [$conftest_s],,
3901       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
3902           [Define if your assembler supports LWSYNC instructions.])])
3903
3904     case $target in
3905       *-*-aix*) conftest_s='    .machine "476"
3906         .csect .text[[PR]]
3907         dci 0';;
3908       *) conftest_s='   .machine "476"
3909         .text
3910         dci 0';;
3911     esac
3912
3913     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
3914       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
3915       [$conftest_s],,
3916       [AC_DEFINE(HAVE_AS_DCI, 1,
3917           [Define if your assembler supports the DCI/ICI instructions.])])
3918
3919     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3920       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
3921       [.gnu_attribute 4,1],,
3922       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3923           [Define if your assembler supports .gnu_attribute.])])
3924
3925     gcc_GAS_CHECK_FEATURE([tls marker support],
3926       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
3927       [ bl __tls_get_addr(x@tlsgd)],,
3928       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
3929           [Define if your assembler supports arg info for __tls_get_addr.])])
3930
3931     case $target in
3932       *-*-aix*)
3933         gcc_GAS_CHECK_FEATURE([.ref support],
3934           gcc_cv_as_aix_ref, [2.21.0],,
3935           [     .csect stuff[[rw]]
3936              stuff:
3937                 .long 1
3938                 .extern sym
3939                 .ref sym
3940           ],,
3941           [AC_DEFINE(HAVE_AS_REF, 1,
3942             [Define if your assembler supports .ref])])
3943         ;;
3944     esac
3945     ;;
3946
3947   mips*-*-*)
3948     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3949       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
3950 [       lw $4,%gp_rel(foo)($4)],,
3951       [if test x$target_cpu_default = x
3952        then target_cpu_default=MASK_EXPLICIT_RELOCS
3953        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
3954        fi])
3955     gcc_GAS_CHECK_FEATURE([-mno-shared support],
3956       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
3957       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
3958                  [Define if the assembler understands -mno-shared.])])
3959
3960     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3961       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
3962       [.gnu_attribute 4,1],,
3963       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3964           [Define if your assembler supports .gnu_attribute.])])
3965
3966     gcc_GAS_CHECK_FEATURE([.dtprelword support],
3967       gcc_cv_as_mips_dtprelword, [2,18,0],,
3968       [.section .tdata,"awT",@progbits
3969 x:
3970         .word 2
3971         .text
3972         .dtprelword x+0x8000],,
3973       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
3974           [Define if your assembler supports .dtprelword.])])
3975
3976     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
3977       gcc_cv_as_mips_dspr1_mult,,,
3978 [       .set    mips32r2
3979         .set    nodspr2
3980         .set    dsp
3981         madd    $ac3,$4,$5
3982         maddu   $ac3,$4,$5
3983         msub    $ac3,$4,$5
3984         msubu   $ac3,$4,$5
3985         mult    $ac3,$4,$5
3986         multu   $ac3,$4,$5],,
3987       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
3988           [Define if your assembler supports DSPR1 mult.])])
3989
3990     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
3991     gcc_cv_as_ld_jalr_reloc=no
3992     if test $gcc_cv_as_mips_explicit_relocs = yes; then
3993       if test $in_tree_ld = yes ; then
3994         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
3995            && test $in_tree_ld_is_elf = yes; then
3996           gcc_cv_as_ld_jalr_reloc=yes
3997         fi
3998       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
3999         echo '  .ent x' > conftest.s
4000         echo 'x:        ld $2,%got_disp(y)($3)' >> conftest.s
4001         echo '  ld $25,%call16(y)($28)' >> conftest.s
4002         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
4003         echo '1:        jalr $25' >> conftest.s
4004         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
4005         echo '1:        jalr $25' >> conftest.s
4006         echo '  .end x' >> conftest.s
4007         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
4008            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
4009           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
4010              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
4011             gcc_cv_as_ld_jalr_reloc=yes
4012           fi
4013         fi
4014         rm -f conftest.*
4015       fi
4016     fi
4017     if test $gcc_cv_as_ld_jalr_reloc = yes; then
4018       if test x$target_cpu_default = x; then
4019         target_cpu_default=MASK_RELAX_PIC_CALLS
4020       else
4021         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
4022       fi
4023     fi
4024     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
4025
4026     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
4027       [gcc_cv_ld_mips_personality_relaxation],
4028       [gcc_cv_ld_mips_personality_relaxation=no
4029        if test $in_tree_ld = yes ; then
4030          if test "$gcc_cv_gld_major_version" -eq 2 \
4031                  -a "$gcc_cv_gld_minor_version" -ge 21 \
4032                  -o "$gcc_cv_gld_major_version" -gt 2; then
4033            gcc_cv_ld_mips_personality_relaxation=yes
4034          fi
4035        elif test x$gcc_cv_as != x \
4036                  -a x$gcc_cv_ld != x \
4037                  -a x$gcc_cv_readelf != x ; then
4038          cat > conftest.s <<EOF
4039         .cfi_startproc
4040         .cfi_personality 0x80,indirect_ptr
4041         .ent test
4042 test:
4043         nop
4044         .end test
4045         .cfi_endproc
4046
4047         .section .data,"aw",@progbits
4048 indirect_ptr:
4049         .dc.a personality
4050 EOF
4051          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
4052             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
4053            if $gcc_cv_readelf -d conftest 2>&1 \
4054               | grep TEXTREL > /dev/null 2>&1; then
4055              :
4056            elif $gcc_cv_readelf --relocs conftest 2>&1 \
4057                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
4058              :
4059            else
4060              gcc_cv_ld_mips_personality_relaxation=yes
4061            fi
4062          fi
4063        fi
4064        rm -f conftest.s conftest.o conftest])
4065     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
4066             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
4067       [Define if your linker can relax absolute .eh_frame personality
4068 pointers into PC-relative form.])
4069     fi
4070     ;;
4071 esac
4072
4073 # Mips and HP-UX need the GNU assembler.
4074 # Linux on IA64 might be able to use the Intel assembler.
4075
4076 case "$target" in
4077   mips*-*-* | *-*-hpux* )
4078     if test x$gas_flag = xyes \
4079        || test x"$host" != x"$build" \
4080        || test ! -x "$gcc_cv_as" \
4081        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
4082       :
4083     else
4084       echo "*** This configuration requires the GNU assembler" >&2
4085       exit 1
4086     fi
4087     ;;
4088 esac
4089
4090 # ??? Not all targets support dwarf2 debug_line, even within a version
4091 # of gas.  Moreover, we need to emit a valid instruction to trigger any
4092 # info to the output file.  So, as supported targets are added to gas 2.11,
4093 # add some instruction here to (also) show we expect this might work.
4094 # ??? Once 2.11 is released, probably need to add first known working
4095 # version to the per-target configury.
4096 case "$cpu_type" in
4097   alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze | mips \
4098   | pa | rs6000 | score | sparc | spu | tilegx | tilepro | xstormy16 | xtensa)
4099     insn="nop"
4100     ;;
4101   ia64 | s390)
4102     insn="nop 0"
4103     ;;
4104   mmix)
4105     insn="swym 0"
4106     ;;
4107 esac
4108 if test x"$insn" != x; then
4109  conftest_s="\
4110         .file 1 \"conftest.s\"
4111         .loc 1 3 0
4112         $insn"
4113  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
4114   gcc_cv_as_dwarf2_debug_line,
4115   [elf,2,11,0],, [$conftest_s],
4116   [if test x$gcc_cv_objdump != x \
4117    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
4118       | grep debug_line > /dev/null 2>&1; then
4119      gcc_cv_as_dwarf2_debug_line=yes
4120    fi])
4121
4122 # The .debug_line file table must be in the exact order that
4123 # we specified the files, since these indices are also used
4124 # by DW_AT_decl_file.  Approximate this test by testing if
4125 # the assembler bitches if the same index is assigned twice.
4126  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
4127   gcc_cv_as_dwarf2_file_buggy,,,
4128 [       .file 1 "foo.s"
4129         .file 1 "bar.s"])
4130
4131  if test $gcc_cv_as_dwarf2_debug_line = yes \
4132  && test $gcc_cv_as_dwarf2_file_buggy = no; then
4133         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
4134   [Define if your assembler supports dwarf2 .file/.loc directives,
4135    and preserves file table indices exactly as given.])
4136  fi
4137
4138  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
4139   gcc_cv_as_gdwarf2_flag,
4140   [elf,2,11,0], [--gdwarf2], [$insn],,
4141   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
4142 [Define if your assembler supports the --gdwarf2 option.])])
4143
4144  gcc_GAS_CHECK_FEATURE([--gstabs option],
4145   gcc_cv_as_gstabs_flag,
4146   [elf,2,11,0], [--gstabs], [$insn],
4147   [# The native Solaris 9/Intel assembler doesn't understand --gstabs
4148    # and warns about it, but still exits successfully.  So check for
4149    # this.
4150    if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
4151    then :
4152    else gcc_cv_as_gstabs_flag=yes
4153    fi],
4154   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
4155 [Define if your assembler supports the --gstabs option.])])
4156
4157  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
4158   gcc_cv_as_debug_prefix_map_flag,
4159   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
4160   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
4161 [Define if your assembler supports the --debug-prefix-map option.])])
4162 fi
4163
4164 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
4165  ,,
4166 [.lcomm bar,4,16],,
4167 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
4168   [Define if your assembler supports .lcomm with an alignment field.])])
4169
4170 AC_ARG_ENABLE(gnu-unique-object,
4171  [AS_HELP_STRING([--enable-gnu-unique-object],
4172    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
4173  [case $enable_gnu_unique_object in
4174     yes | no) ;;
4175     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
4176 Valid choices are 'yes' and 'no'.]) ;;
4177   esac],
4178  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
4179    [elf,2,19,52],,
4180    [.type foo, @gnu_unique_object],,
4181 # Also check for ld.so support, i.e. glibc 2.11 or higher.
4182    [[if test x$host = x$build -a x$host = x$target &&
4183        ldd --version 2>/dev/null &&
4184        glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
4185       glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
4186       glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
4187       glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
4188       if test "$glibcnum" -ge 2011 ; then
4189         enable_gnu_unique_object=yes
4190       fi
4191     fi]])])
4192 if test x$enable_gnu_unique_object = xyes; then
4193   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
4194    [Define if your assembler supports @gnu_unique_object.])
4195 fi
4196
4197 AC_CACHE_CHECK([assembler for tolerance to line number 0],
4198  [gcc_cv_as_line_zero],
4199  [gcc_cv_as_line_zero=no
4200   if test $in_tree_gas = yes; then
4201     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
4202   elif test "x$gcc_cv_as" != x; then
4203     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
4204     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
4205        test "x`cat conftest.out`" = x
4206     then
4207       gcc_cv_as_line_zero=yes
4208     else
4209       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
4210       cat conftest.s >&AS_MESSAGE_LOG_FD
4211       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
4212       cat conftest.out >&AS_MESSAGE_LOG_FD
4213     fi
4214     rm -f conftest.o conftest.s conftest.out
4215   fi])
4216 if test "x$gcc_cv_as_line_zero" = xyes; then
4217   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
4218 [Define if the assembler won't complain about a line such as # 0 "" 2.])
4219 fi
4220
4221 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
4222 gcc_cv_ld_eh_frame_hdr=no
4223 if test $in_tree_ld = yes ; then
4224   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
4225      && test $in_tree_ld_is_elf = yes; then
4226     gcc_cv_ld_eh_frame_hdr=yes
4227   fi
4228 elif test x$gcc_cv_ld != x; then
4229   if echo "$ld_ver" | grep GNU > /dev/null; then
4230     # Check if linker supports --eh-frame-hdr option
4231     if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
4232       gcc_cv_ld_eh_frame_hdr=yes
4233     fi
4234   else
4235     case "$target" in
4236       *-*-solaris2*)
4237         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
4238         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
4239           gcc_cv_ld_eh_frame_hdr=yes
4240         fi
4241         ;;
4242     esac
4243   fi
4244 fi
4245 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
4246 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
4247         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
4248 [Define if your linker supports .eh_frame_hdr.])
4249 fi
4250 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
4251
4252 AC_MSG_CHECKING(linker position independent executable support)
4253 gcc_cv_ld_pie=no
4254 if test $in_tree_ld = yes ; then
4255   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
4256      && test $in_tree_ld_is_elf = yes; then
4257     gcc_cv_ld_pie=yes
4258   fi
4259 elif test x$gcc_cv_ld != x; then
4260         # Check if linker supports -pie option
4261         if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
4262                 gcc_cv_ld_pie=yes
4263         fi
4264 fi
4265 if test x"$gcc_cv_ld_pie" = xyes; then
4266         AC_DEFINE(HAVE_LD_PIE, 1,
4267 [Define if your linker supports -pie option.])
4268 fi
4269 AC_MSG_RESULT($gcc_cv_ld_pie)
4270
4271 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
4272 gcc_cv_ld_eh_gc_sections=no
4273 if test $in_tree_ld = yes ; then
4274   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
4275      && test $in_tree_ld_is_elf = yes; then
4276     gcc_cv_ld_eh_gc_sections=yes
4277   fi
4278 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
4279   cat > conftest.s <<EOF
4280         .section        .text
4281 .globl _start
4282         .type _start, @function
4283 _start:
4284         .long foo
4285         .size _start, .-_start
4286         .section        .text.foo,"ax",@progbits
4287         .type foo, @function
4288 foo:
4289         .long 0
4290         .size foo, .-foo
4291         .section        .gcc_except_table.foo,"a",@progbits
4292 .L0:
4293         .long 0
4294         .section        .eh_frame,"a",@progbits
4295         .long .L0
4296 EOF
4297   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4298     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4299          | grep "gc-sections option ignored" > /dev/null; then
4300       gcc_cv_ld_eh_gc_sections=no
4301     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4302          | grep gcc_except_table > /dev/null; then
4303       gcc_cv_ld_eh_gc_sections=yes
4304       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
4305       if test x$gcc_cv_as_comdat_group != xyes; then
4306         gcc_cv_ld_eh_gc_sections=no
4307         cat > conftest.s <<EOF
4308         .section        .text
4309 .globl _start
4310         .type _start, @function
4311 _start:
4312         .long foo
4313         .size _start, .-_start
4314         .section        .gnu.linkonce.t.foo,"ax",@progbits
4315         .type foo, @function
4316 foo:
4317         .long 0
4318         .size foo, .-foo
4319         .section        .gcc_except_table.foo,"a",@progbits
4320 .L0:
4321         .long 0
4322         .section        .eh_frame,"a",@progbits
4323         .long .L0
4324 EOF
4325         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4326           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4327                | grep "gc-sections option ignored" > /dev/null; then
4328             gcc_cv_ld_eh_gc_sections=no
4329           elif $gcc_cv_objdump -h conftest 2> /dev/null \
4330                | grep gcc_except_table > /dev/null; then
4331             gcc_cv_ld_eh_gc_sections=yes
4332           fi
4333         fi
4334       fi
4335     fi
4336   fi
4337   rm -f conftest.s conftest.o conftest
4338 fi
4339 case "$target" in
4340   hppa*-*-linux*)
4341     # ??? This apparently exposes a binutils bug with PC-relative relocations.
4342     gcc_cv_ld_eh_gc_sections=no
4343     ;;
4344 esac
4345 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
4346         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
4347   [Define if your linker supports garbage collection of
4348    sections in presence of EH frames.])
4349 fi
4350 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
4351
4352 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
4353 gcc_cv_ld_eh_gc_sections_bug=no
4354 if test $in_tree_ld = yes ; then
4355   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
4356      && test $in_tree_ld_is_elf = yes; then
4357     gcc_cv_ld_eh_gc_sections_bug=yes
4358   fi
4359 elif test x$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
4360   gcc_cv_ld_eh_gc_sections_bug=yes
4361   cat > conftest.s <<EOF
4362         .section        .text
4363 .globl _start
4364         .type _start, @function
4365 _start:
4366         .long foo
4367         .size _start, .-_start
4368         .section        .text.startup.foo,"ax",@progbits
4369         .type foo, @function
4370 foo:
4371         .long 0
4372         .size foo, .-foo
4373         .section        .gcc_except_table.foo,"a",@progbits
4374 .L0:
4375         .long 0
4376         .section        .eh_frame,"a",@progbits
4377         .long .L0
4378 EOF
4379   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4380     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4381          | grep "gc-sections option ignored" > /dev/null; then
4382       :
4383     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4384          | grep gcc_except_table > /dev/null; then
4385       gcc_cv_ld_eh_gc_sections_bug=no
4386     fi
4387   fi
4388   rm -f conftest.s conftest.o conftest
4389 fi
4390 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
4391         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
4392   [Define if your linker has buggy garbage collection of
4393    sections support when .text.startup.foo like sections are used.])
4394 fi
4395 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
4396
4397 # --------
4398 # UNSORTED
4399 # --------
4400
4401 AC_CACHE_CHECK(linker --as-needed support,
4402 gcc_cv_ld_as_needed,
4403 [gcc_cv_ld_as_needed=no
4404 if test $in_tree_ld = yes ; then
4405   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4406      && test $in_tree_ld_is_elf = yes; then
4407     gcc_cv_ld_as_needed=yes
4408   fi
4409 elif test x$gcc_cv_ld != x; then
4410         # Check if linker supports --as-needed and --no-as-needed options
4411         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
4412                 gcc_cv_ld_as_needed=yes
4413         fi
4414 fi
4415 ])
4416 if test x"$gcc_cv_ld_as_needed" = xyes; then
4417         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
4418 [Define if your linker supports --as-needed and --no-as-needed options.])
4419 fi
4420
4421 case "$target:$tm_file" in
4422   powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
4423     AC_CACHE_CHECK(linker support for omitting dot symbols,
4424     gcc_cv_ld_no_dot_syms,
4425     [gcc_cv_ld_no_dot_syms=no
4426     if test $in_tree_ld = yes ; then
4427       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
4428         gcc_cv_ld_no_dot_syms=yes
4429       fi
4430     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4431       cat > conftest1.s <<EOF
4432         .text
4433         bl .foo
4434 EOF
4435       cat > conftest2.s <<EOF
4436         .section ".opd","aw"
4437         .align 3
4438         .globl foo
4439         .type foo,@function
4440 foo:
4441         .quad .LEfoo,.TOC.@tocbase,0
4442         .text
4443 .LEfoo:
4444         blr
4445         .size foo,.-.LEfoo
4446 EOF
4447       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
4448          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
4449          && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
4450         gcc_cv_ld_no_dot_syms=yes
4451       fi
4452       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
4453     fi
4454     ])
4455     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
4456       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
4457     [Define if your PowerPC64 linker only needs function descriptor syms.])
4458     fi
4459
4460     AC_CACHE_CHECK(linker large toc support,
4461     gcc_cv_ld_large_toc,
4462     [gcc_cv_ld_large_toc=no
4463     if test $in_tree_ld = yes ; then
4464       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
4465         gcc_cv_ld_large_toc=yes
4466       fi
4467     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4468       cat > conftest.s <<EOF
4469         .section ".tbss","awT",@nobits
4470         .align 3
4471 ie0:    .space 8
4472         .global _start
4473         .text
4474 _start:
4475         addis 9,13,ie0@got@tprel@ha
4476         ld 9,ie0@got@tprel@l(9)
4477 EOF
4478       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
4479          && $gcc_cv_ld -melf64ppc --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
4480         gcc_cv_ld_large_toc=yes
4481       fi
4482       rm -f conftest conftest.o conftest.s
4483     fi
4484     ])
4485     if test x"$gcc_cv_ld_large_toc" = xyes; then
4486       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4487     [Define if your PowerPC64 linker supports a large TOC.])
4488     fi
4489     ;;
4490 esac
4491
4492 AC_CACHE_CHECK(linker --build-id support,
4493   gcc_cv_ld_buildid,
4494   [gcc_cv_ld_buildid=no
4495   if test $in_tree_ld = yes ; then
4496     if test "$gcc_cv_gld_major_version" -eq 2 -a \
4497        "$gcc_cv_gld_minor_version" -ge 18 -o \
4498        "$gcc_cv_gld_major_version" -gt 2 \
4499        && test $in_tree_ld_is_elf = yes; then
4500       gcc_cv_ld_buildid=yes
4501     fi
4502   elif test x$gcc_cv_ld != x; then
4503     if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
4504       gcc_cv_ld_buildid=yes
4505     fi
4506   fi])
4507 if test x"$gcc_cv_ld_buildid" = xyes; then
4508   AC_DEFINE(HAVE_LD_BUILDID, 1,
4509   [Define if your linker supports --build-id.])
4510 fi
4511
4512 AC_ARG_ENABLE(linker-build-id,
4513 [AS_HELP_STRING([--enable-linker-build-id],
4514                 [compiler will always pass --build-id to linker])],
4515 [],
4516 enable_linker_build_id=no)
4517
4518 if test x"$enable_linker_build_id" = xyes; then
4519   if test x"$gcc_cv_ld_buildid" = xyes; then
4520     AC_DEFINE(ENABLE_LD_BUILDID, 1,
4521     [Define if gcc should always pass --build-id to linker.])
4522   else
4523     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
4524   fi
4525 fi
4526
4527 # In binutils 2.21, GNU ld gained support for new emulations fully
4528 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
4529 AC_CACHE_CHECK(linker *_sol2 emulation support,
4530   gcc_cv_ld_sol2_emulation,
4531   [gcc_cv_ld_sol2_emulation=no
4532   if test $in_tree_ld = yes ; then
4533     if test "$gcc_cv_gld_major_version" -eq 2 -a \
4534        "$gcc_cv_gld_minor_version" -ge 21 -o \
4535        "$gcc_cv_gld_major_version" -gt 2 \
4536        && test $in_tree_ld_is_elf = yes; then
4537       gcc_cv_ld_sol2_emulation=yes
4538     fi
4539   elif test x$gcc_cv_ld != x; then
4540     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
4541        grep _sol2 > /dev/null; then
4542       gcc_cv_ld_sol2_emulation=yes
4543     fi
4544   fi])
4545 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
4546   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
4547   [Define if your linker supports the *_sol2 emulations.])
4548 fi
4549
4550 AC_CACHE_CHECK(linker --sysroot support,
4551   gcc_cv_ld_sysroot,
4552   [gcc_cv_ld_sysroot=no
4553   if test $in_tree_ld = yes ; then
4554       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
4555         gcc_cv_ld_sysroot=yes
4556       fi
4557   elif test x$gcc_cv_ld != x; then
4558     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
4559       gcc_cv_ld_sysroot=yes
4560     fi
4561   fi])
4562 if test x"$gcc_cv_ld_sysroot" = xyes; then
4563   AC_DEFINE(HAVE_LD_SYSROOT, 1,
4564   [Define if your linker supports --sysroot.])
4565 fi
4566
4567 if test x$with_sysroot = x && test x$host = x$target \
4568    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4569    && test "$prefix" != "NONE"; then
4570   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4571 [Define to PREFIX/include if cpp should also search that directory.])
4572 fi
4573
4574 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4575   if test "x$with_headers" != x; then
4576     target_header_dir=$with_headers
4577   elif test "x$with_sysroot" = x; then
4578     target_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4579   elif test "x$with_build_sysroot" != "x"; then
4580     target_header_dir="${with_build_sysroot}${native_system_header_dir}"
4581   elif test "x$with_sysroot" = xyes; then
4582     target_header_dir="${exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
4583   else
4584     target_header_dir="${with_sysroot}${native_system_header_dir}"
4585   fi
4586 else
4587   target_header_dir=${native_system_header_dir}
4588 fi
4589
4590 # Test for stack protector support in target C library.
4591 AC_CACHE_CHECK(__stack_chk_fail in target C library,
4592       gcc_cv_libc_provides_ssp,
4593       [gcc_cv_libc_provides_ssp=no
4594     case "$target" in
4595        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
4596       [# glibc 2.4 and later provides __stack_chk_fail and
4597       # either __stack_chk_guard, or TLS access to stack guard canary.
4598       if test -f $target_header_dir/features.h \
4599          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
4600             $target_header_dir/features.h > /dev/null; then
4601         if $EGREP '^[   ]*#[    ]*define[       ]+__GLIBC__[    ]+([1-9][0-9]|[3-9])' \
4602            $target_header_dir/features.h > /dev/null; then
4603           gcc_cv_libc_provides_ssp=yes
4604         elif $EGREP '^[         ]*#[    ]*define[       ]+__GLIBC__[    ]+2' \
4605              $target_header_dir/features.h > /dev/null \
4606              && $EGREP '^[      ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+([1-9][0-9]|[4-9])' \
4607              $target_header_dir/features.h > /dev/null; then
4608           gcc_cv_libc_provides_ssp=yes
4609         elif $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
4610              $target_header_dir/features.h > /dev/null && \
4611              test -f $target_header_dir/bits/uClibc_config.h && \
4612              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
4613              $target_header_dir/bits/uClibc_config.h > /dev/null; then
4614           gcc_cv_libc_provides_ssp=yes
4615         fi
4616       fi]
4617         ;;
4618        *-*-gnu*)
4619          # Avoid complicated tests (see
4620          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
4621          # simply assert that glibc does provide this, which is true for all
4622          # realistically usable GNU/Hurd configurations.
4623          gcc_cv_libc_provides_ssp=yes;;
4624        *-*-darwin* | *-*-freebsd*)
4625          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
4626            [echo "no __stack_chk_fail on this target"])
4627         ;;
4628   *) gcc_cv_libc_provides_ssp=no ;;
4629     esac])
4630
4631 if test x$gcc_cv_libc_provides_ssp = xyes; then
4632   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
4633             [Define if your target C library provides stack protector support])
4634 fi
4635
4636 # Test for <sys/sdt.h> on the target.
4637 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
4638 AC_MSG_CHECKING(sys/sdt.h in the target C library)
4639 have_sys_sdt_h=no
4640 if test -f $target_header_dir/sys/sdt.h; then
4641   have_sys_sdt_h=yes
4642   AC_DEFINE(HAVE_SYS_SDT_H, 1,
4643             [Define if your target C library provides sys/sdt.h])
4644 fi
4645 AC_MSG_RESULT($have_sys_sdt_h)
4646
4647 # Check if TFmode long double should be used by default or not.
4648 # Some glibc targets used DFmode long double, but with glibc 2.4
4649 # and later they can use TFmode.
4650 case "$target" in
4651   powerpc*-*-linux* | \
4652   sparc*-*-linux* | \
4653   s390*-*-linux* | \
4654   alpha*-*-linux*)
4655     AC_ARG_WITH(long-double-128,
4656       [AS_HELP_STRING([--with-long-double-128],
4657                       [use 128-bit long double by default])],
4658       gcc_cv_target_ldbl128="$with_long_double_128",
4659       [[gcc_cv_target_ldbl128=no
4660       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
4661         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
4662       && gcc_cv_target_ldbl128=yes
4663       ]])
4664     ;;
4665 esac
4666 if test x$gcc_cv_target_ldbl128 = xyes; then
4667   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
4668             [Define if TFmode long double should be the default])
4669 fi
4670
4671 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
4672 gcc_cv_target_dl_iterate_phdr=unknown
4673 case "$target" in
4674   # Restrict to Solaris 11+.  While most of the Solaris 11 linker changes
4675   # were backported to Solaris 10 Update 10, dl_iterate_phdr only lives in
4676   # libdl there, both complicating its use and breaking compatibility
4677   # between Solaris 10 updates.
4678   *-*-solaris2.1[[1-9]]*)
4679     # <link.h> needs both a dl_iterate_phdr declaration and support for
4680     # compilation with largefile support.
4681     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
4682       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
4683       gcc_cv_target_dl_iterate_phdr=yes
4684     else
4685       gcc_cv_target_dl_iterate_phdr=no
4686     fi
4687     ;;
4688 esac
4689 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
4690 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
4691    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
4692 [Define if your target C library provides the `dl_iterate_phdr' function.])
4693 fi
4694 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
4695
4696 # Find out what GC implementation we want, or may, use.
4697 AC_ARG_WITH(gc,
4698 [AS_HELP_STRING([--with-gc={page,zone}],
4699                 [choose the garbage collection mechanism to use
4700                  with the compiler])],
4701 [case "$withval" in
4702   page)
4703     GGC=ggc-$withval
4704     ;;
4705   zone)
4706     GGC=ggc-$withval
4707     AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
4708     ;;
4709   *)
4710     AC_MSG_ERROR([$withval is an invalid option to --with-gc])
4711     ;;
4712 esac],
4713 [GGC=ggc-page])
4714 AC_SUBST(GGC)
4715 echo "Using $GGC for garbage collection."
4716
4717 # Libraries to use on the host.  This will normally be set by the top
4718 # level Makefile.  Here we simply capture the value for our Makefile.
4719 if test -z "${HOST_LIBS+set}"; then
4720   HOST_LIBS=
4721 fi
4722 AC_SUBST(HOST_LIBS)
4723
4724 # Use the system's zlib library.
4725 zlibdir=-L../zlib
4726 zlibinc="-I\$(srcdir)/../zlib"
4727 AC_ARG_WITH(system-zlib,
4728 [AS_HELP_STRING([--with-system-zlib], [use installed libz])],
4729 zlibdir=
4730 zlibinc=
4731 )
4732 AC_SUBST(zlibdir)
4733 AC_SUBST(zlibinc)
4734
4735 dnl Very limited version of automake's enable-maintainer-mode
4736
4737 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
4738   dnl maintainer-mode is disabled by default
4739   AC_ARG_ENABLE(maintainer-mode,
4740 [AS_HELP_STRING([--enable-maintainer-mode],
4741                 [enable make rules and dependencies not useful
4742                  (and sometimes confusing) to the casual installer])],
4743       maintainer_mode=$enableval,
4744       maintainer_mode=no)
4745
4746 AC_MSG_RESULT($maintainer_mode)
4747
4748 if test "$maintainer_mode" = "yes"; then
4749   MAINT=''
4750 else
4751   MAINT='#'
4752 fi
4753 AC_SUBST(MAINT)dnl
4754
4755 # --------------
4756 # Language hooks
4757 # --------------
4758
4759 # Make empty files to contain the specs and options for each language.
4760 # Then add #include lines to for a compiler that has specs and/or options.
4761
4762 subdirs=
4763 lang_opt_files=
4764 lang_specs_files=
4765 lang_tree_files=
4766 # These (without "all_") are set in each config-lang.in.
4767 # `language' must be a single word so is spelled singularly.
4768 all_languages=
4769 all_compilers=
4770 all_outputs='Makefile'
4771 # List of language makefile fragments.
4772 all_lang_makefrags=
4773 # Additional files for gengtype
4774 all_gtfiles="$target_gtfiles"
4775
4776 # These are the languages that are set in --enable-languages,
4777 # and are available in the GCC tree.
4778 all_selected_languages=
4779
4780 # Add the language fragments.
4781 # Languages are added via two mechanisms.  Some information must be
4782 # recorded in makefile variables, these are defined in config-lang.in.
4783 # We accumulate them and plug them into the main Makefile.
4784 # The other mechanism is a set of hooks for each of the main targets
4785 # like `clean', `install', etc.
4786
4787 language_hooks="Make-hooks"
4788
4789 for lang in ${srcdir}/*/config-lang.in
4790 do
4791 changequote(,)dnl
4792         test "$lang" = "${srcdir}/*/config-lang.in" && continue
4793
4794         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
4795         if test "x$lang_alias" = x
4796         then
4797               echo "$lang doesn't set \$language." 1>&2
4798               exit 1
4799         fi
4800         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
4801         subdirs="$subdirs $subdir"
4802
4803         # $gcc_subdir is where the gcc integration files are to be found
4804         # for a language, both for internal compiler purposes (compiler
4805         # sources implementing front-end to GCC tree converters), and for
4806         # build infrastructure purposes (Make-lang.in, etc.)
4807         #
4808         # This will be <subdir> (relative to $srcdir) if a line like
4809         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
4810         # is found in <langdir>/config-lang.in, and will remain <langdir>
4811         # otherwise.
4812         #
4813         # Except for the language alias (fetched above), the regular
4814         # "config-lang.in" contents are always retrieved from $gcc_subdir,
4815         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
4816         # only this and the language alias.
4817
4818         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
4819         if [ "$gcc_subdir" = "" ]; then
4820            gcc_subdir="$subdir"
4821         fi
4822
4823         case ",$enable_languages," in
4824         *,$lang_alias,*)
4825             all_selected_languages="$all_selected_languages $lang_alias"
4826             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
4827                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
4828             fi
4829             ;;
4830         esac
4831 changequote([,])dnl
4832
4833         language=
4834         boot_language=
4835         compilers=
4836         outputs=
4837         gtfiles=
4838         subdir_requires=
4839         . ${srcdir}/$gcc_subdir/config-lang.in
4840         if test "x$language" = x
4841         then
4842                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
4843                 exit 1
4844         fi
4845
4846         ok=:
4847         case ",$enable_languages," in
4848                 *,$lang_alias,*) ;;
4849                 *)
4850                         for i in $subdir_requires; do
4851                                 test -f "${srcdir}/$i/config-lang.in" && continue
4852                                 ok=false
4853                                 break
4854                         done
4855                 ;;
4856         esac
4857         $ok || continue
4858
4859         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
4860         if test -f $srcdir/$gcc_subdir/lang.opt; then
4861             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
4862             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
4863         fi
4864         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
4865             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
4866         fi
4867         all_languages="$all_languages $language"
4868         all_compilers="$all_compilers $compilers"
4869         all_outputs="$all_outputs $outputs"
4870         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
4871         case ",$enable_languages," in
4872                 *,lto,*)
4873                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
4874                     enable_lto=yes
4875                     AC_SUBST(enable_lto)
4876                     ;;
4877                 *) ;;
4878         esac
4879 done
4880
4881 # Pick up gtfiles for c
4882 gtfiles=
4883 . ${srcdir}/c-config-lang.in
4884 all_gtfiles="$all_gtfiles [[c]] $gtfiles"
4885
4886 check_languages=
4887 for language in $all_selected_languages
4888 do
4889         check_languages="$check_languages check-$language"
4890 done
4891
4892 # We link each language in with a set of hooks, reached indirectly via
4893 # lang.${target}.  Only do so for selected languages.
4894
4895 rm -f Make-hooks
4896 touch Make-hooks
4897 target_list="all.cross start.encap rest.encap tags \
4898         install-common install-man install-info install-pdf install-html dvi \
4899         pdf html uninstall info man srcextra srcman srcinfo \
4900         mostlyclean clean distclean maintainer-clean install-plugin"
4901
4902 for t in $target_list
4903 do
4904         x=
4905         for lang in $all_selected_languages
4906         do
4907                 x="$x $lang.$t"
4908         done
4909         echo "lang.$t: $x" >> Make-hooks
4910 done
4911
4912 # --------
4913 # Option include files
4914 # --------
4915
4916 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
4917 option_includes="option-includes.mk"
4918 AC_SUBST_FILE(option_includes)
4919
4920 # --------
4921 # UNSORTED
4922 # --------
4923
4924 # Create .gdbinit.
4925
4926 echo "dir ." > .gdbinit
4927 echo "dir ${srcdir}" >> .gdbinit
4928 if test x$gdb_needs_out_file_path = xyes
4929 then
4930         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
4931 fi
4932 if test "x$subdirs" != x; then
4933         for s in $subdirs
4934         do
4935                 echo "dir ${srcdir}/$s" >> .gdbinit
4936         done
4937 fi
4938 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
4939
4940 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
4941 AC_SUBST(gcc_tooldir)
4942 AC_SUBST(dollar)
4943
4944 # Find a directory in which to install a shared libgcc.
4945
4946 AC_ARG_ENABLE(version-specific-runtime-libs,
4947 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
4948                 [specify that runtime libraries should be
4949                  installed in a compiler-specific directory])])
4950
4951 # Substitute configuration variables
4952 AC_SUBST(subdirs)
4953 AC_SUBST(srcdir)
4954 AC_SUBST(all_compilers)
4955 AC_SUBST(all_gtfiles)
4956 AC_SUBST(all_lang_makefrags)
4957 AC_SUBST(all_languages)
4958 AC_SUBST(all_selected_languages)
4959 AC_SUBST(build_exeext)
4960 AC_SUBST(build_install_headers_dir)
4961 AC_SUBST(build_xm_file_list)
4962 AC_SUBST(build_xm_include_list)
4963 AC_SUBST(build_xm_defines)
4964 AC_SUBST(build_file_translate)
4965 AC_SUBST(check_languages)
4966 AC_SUBST(cpp_install_dir)
4967 AC_SUBST(xmake_file)
4968 AC_SUBST(tmake_file)
4969 AC_SUBST(TM_ENDIAN_CONFIG)
4970 AC_SUBST(TM_MULTILIB_CONFIG)
4971 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
4972 AC_SUBST(extra_gcc_objs)
4973 AC_SUBST(user_headers_inc_next_pre)
4974 AC_SUBST(user_headers_inc_next_post)
4975 AC_SUBST(extra_headers_list)
4976 AC_SUBST(extra_objs)
4977 AC_SUBST(extra_programs)
4978 AC_SUBST(float_h_file)
4979 AC_SUBST(gcc_config_arguments)
4980 AC_SUBST(gcc_gxx_include_dir)
4981 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
4982 AC_SUBST(host_exeext)
4983 AC_SUBST(host_xm_file_list)
4984 AC_SUBST(host_xm_include_list)
4985 AC_SUBST(host_xm_defines)
4986 AC_SUBST(out_host_hook_obj)
4987 AC_SUBST(install)
4988 AC_SUBST(lang_opt_files)
4989 AC_SUBST(lang_specs_files)
4990 AC_SUBST(lang_tree_files)
4991 AC_SUBST(local_prefix)
4992 AC_SUBST(md_file)
4993 AC_SUBST(objc_boehm_gc)
4994 AC_SUBST(out_file)
4995 AC_SUBST(out_object_file)
4996 AC_SUBST(common_out_file)
4997 AC_SUBST(common_out_object_file)
4998 AC_SUBST(tm_file_list)
4999 AC_SUBST(tm_include_list)
5000 AC_SUBST(tm_defines)
5001 AC_SUBST(tm_p_file_list)
5002 AC_SUBST(tm_p_include_list)
5003 AC_SUBST(xm_file_list)
5004 AC_SUBST(xm_include_list)
5005 AC_SUBST(xm_defines)
5006 AC_SUBST(use_gcc_stdint)
5007 AC_SUBST(c_target_objs)
5008 AC_SUBST(cxx_target_objs)
5009 AC_SUBST(fortran_target_objs)
5010 AC_SUBST(target_cpu_default)
5011
5012 AC_SUBST_FILE(language_hooks)
5013
5014 # Echo link setup.
5015 if test x${build} = x${host} ; then
5016   if test x${host} = x${target} ; then
5017     echo "Links are now set up to build a native compiler for ${target}." 1>&2
5018   else
5019     echo "Links are now set up to build a cross-compiler" 1>&2
5020     echo " from ${host} to ${target}." 1>&2
5021   fi
5022 else
5023   if test x${host} = x${target} ; then
5024     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
5025     echo " for ${target}." 1>&2
5026   else
5027     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
5028     echo " from ${host} to ${target}." 1>&2
5029   fi
5030 fi
5031
5032 AC_ARG_VAR(GMPLIBS,[How to link GMP])
5033 AC_ARG_VAR(GMPINC,[How to find GMP include files])
5034
5035 AC_ARG_VAR(PPLLIBS,[How to link PPL])
5036 AC_ARG_VAR(PPLINC,[How to find PPL include files])
5037
5038 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
5039 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
5040 if test "x${CLOOGLIBS}" != "x" ; then
5041    AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
5042 fi
5043
5044 # Check for plugin support
5045 AC_ARG_ENABLE(plugin,
5046 [AS_HELP_STRING([--enable-plugin], [enable plugin support])],
5047 enable_plugin=$enableval,
5048 enable_plugin=yes; default_plugin=yes)
5049
5050 pluginlibs=
5051
5052 case "${host}" in
5053   *-*-darwin*)
5054     if test x$build = x$host; then
5055       export_sym_check="nm${exeext} -g"
5056     elif test x$host = x$target; then
5057       export_sym_check="$gcc_cv_nm -g"
5058     else
5059       export_sym_check=
5060     fi
5061   ;;
5062   *)
5063     if test x$build = x$host; then
5064       export_sym_check="objdump${exeext} -T"
5065     elif test x$host = x$target; then
5066       export_sym_check="$gcc_cv_objdump -T"
5067     else
5068       export_sym_check=
5069     fi
5070   ;;
5071 esac
5072
5073 if test x"$enable_plugin" = x"yes"; then
5074
5075   AC_MSG_CHECKING([for exported symbols])
5076   if test "x$export_sym_check" != x; then
5077     echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
5078     ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
5079     if $export_sym_check conftest | grep foobar > /dev/null; then
5080       : # No need to use a flag
5081       AC_MSG_RESULT([yes])
5082     else
5083       AC_MSG_RESULT([yes])
5084       AC_MSG_CHECKING([for -rdynamic])
5085       ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
5086       if $export_sym_check conftest | grep foobar > /dev/null; then
5087         plugin_rdynamic=yes
5088         pluginlibs="-rdynamic"
5089       else
5090         plugin_rdynamic=no
5091         enable_plugin=no
5092       fi
5093       AC_MSG_RESULT([$plugin_rdynamic])
5094     fi
5095   else
5096     AC_MSG_RESULT([unable to check])
5097   fi
5098
5099   # Check -ldl
5100   saved_LIBS="$LIBS"
5101   AC_SEARCH_LIBS([dlopen], [dl])
5102   if test x"$ac_cv_search_dlopen" = x"-ldl"; then
5103     pluginlibs="$pluginlibs -ldl"
5104   fi
5105   LIBS="$saved_LIBS"
5106
5107   # Check that we can build shared objects with -fPIC -shared
5108   saved_LDFLAGS="$LDFLAGS"
5109   saved_CFLAGS="$CFLAGS"
5110   case "${host}" in
5111     *-*-darwin*)
5112       CFLAGS=`echo $CFLAGS | sed s/-mdynamic-no-pic//g`
5113       CFLAGS="$CFLAGS -fPIC"
5114       LDFLAGS="$LDFLAGS -shared -undefined dynamic_lookup"
5115     ;;
5116     *)
5117       CFLAGS="$CFLAGS -fPIC"
5118       LDFLAGS="$LDFLAGS -fPIC -shared"
5119     ;;
5120   esac
5121   AC_MSG_CHECKING([for -fPIC -shared])
5122   AC_TRY_LINK(
5123     [extern int X;],[return X == 0;],
5124     [AC_MSG_RESULT([yes]); have_pic_shared=yes],
5125     [AC_MSG_RESULT([no]); have_pic_shared=no])
5126   if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
5127     pluginlibs=
5128     enable_plugin=no
5129   fi
5130   LDFLAGS="$saved_LDFLAGS"
5131   CFLAGS="$saved_CFLAGS"
5132
5133   # If plugin support had been requested but not available, fail.
5134   if test x"$enable_plugin" = x"no" ; then
5135     if test x"$default_plugin" != x"yes"; then
5136       AC_MSG_ERROR([
5137 Building GCC with plugin support requires a host that supports
5138 -fPIC, -shared, -ldl and -rdynamic.])
5139     fi
5140   fi
5141 fi
5142
5143 AC_SUBST(pluginlibs)
5144 AC_SUBST(enable_plugin)
5145 if test x"$enable_plugin" = x"yes"; then
5146   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
5147 fi
5148
5149
5150 AC_ARG_ENABLE(libquadmath-support,
5151 [AS_HELP_STRING([--disable-libquadmath-support],
5152   [disable libquadmath support for Fortran])],
5153 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
5154 ENABLE_LIBQUADMATH_SUPPORT=yes)
5155 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
5156   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
5157             [Define to 1 to enable libquadmath support])
5158 fi
5159
5160
5161 # Specify what hash style to use by default.
5162 AC_ARG_WITH([linker-hash-style],
5163 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
5164                 [specify the linker hash style])],
5165 [case x"$withval" in
5166    xsysv)
5167      LINKER_HASH_STYLE=sysv
5168      ;;
5169    xgnu)
5170      LINKER_HASH_STYLE=gnu
5171      ;;
5172    xboth)
5173      LINKER_HASH_STYLE=both
5174      ;;
5175    *)
5176      AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
5177      ;;
5178  esac],
5179 [LINKER_HASH_STYLE=''])
5180 if test x"${LINKER_HASH_STYLE}" != x; then
5181   AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
5182                                          [The linker hash style])
5183 fi
5184
5185 # Configure the subdirectories
5186 # AC_CONFIG_SUBDIRS($subdirs)
5187
5188 # Create the Makefile
5189 # and configure language subdirectories
5190 AC_CONFIG_FILES($all_outputs)
5191
5192 AC_CONFIG_COMMANDS([default],
5193 [
5194 case ${CONFIG_HEADERS} in
5195   *auto-host.h:config.in*)
5196   echo > cstamp-h ;;
5197 esac
5198 # Make sure all the subdirs exist.
5199 for d in $subdirs doc build common c-family
5200 do
5201     test -d $d || mkdir $d
5202 done
5203 ],
5204 [subdirs='$subdirs'])
5205 AC_OUTPUT
5206