2 # Process this file with autoconf to generate a configuration script.
4 # Copyright (C) 1997-2023 Free Software Foundation, Inc.
6 #This file is part of GCC.
8 #GCC is free software; you can redistribute it and/or modify it under
9 #the terms of the GNU General Public License as published by the Free
10 #Software Foundation; either version 3, or (at your option) any later
13 #GCC is distributed in the hope that it will be useful, but WITHOUT
14 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 #FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 #You should have received a copy of the GNU General Public License
19 #along with GCC; see the file COPYING3. If not see
20 #<http://www.gnu.org/licenses/>.
22 # --------------------------------
23 # Initialization and sanity checks
24 # --------------------------------
27 AC_CONFIG_SRCDIR(tree.cc)
28 AC_CONFIG_MACRO_DIRS([../config] [..])
29 AC_CONFIG_HEADER(auto-host.h:config.in)
31 gcc_version=`cat $srcdir/BASE-VER`
33 # Determine the host, build, and target systems
38 # Determine the noncanonical host name, for Ada.
41 # Determine the noncanonical target name, for directory use.
42 ACX_NONCANONICAL_TARGET
44 # Used for constructing correct paths for offload compilers.
45 real_target_noncanonical=${target_noncanonical}
48 # Determine the target- and build-specific subdirectories
51 # Set program_transform_name
54 # Check for bogus environment variables.
55 # Test if LIBRARY_PATH contains the notation for the current directory
56 # since this would lead to problems installing/building glibc.
57 # LIBRARY_PATH contains the current directory if one of the following
59 # - one of the terminals (":" and ";") is the first or last sign
60 # - two terminals occur directly after each other
61 # - the path contains an element with a dot in it
62 AC_MSG_CHECKING(LIBRARY_PATH variable)
64 case ${LIBRARY_PATH} in
65 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
66 library_path_setting="contains current directory"
69 library_path_setting="ok"
73 AC_MSG_RESULT($library_path_setting)
74 if test "$library_path_setting" != "ok"; then
76 *** LIBRARY_PATH shouldn't contain the current directory when
77 *** building gcc. Please change the environment variable
78 *** and run configure again.])
81 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
82 # since this would lead to problems installing/building glibc.
83 # GCC_EXEC_PREFIX contains the current directory if one of the following
85 # - one of the terminals (":" and ";") is the first or last sign
86 # - two terminals occur directly after each other
87 # - the path contains an element with a dot in it
88 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
90 case ${GCC_EXEC_PREFIX} in
91 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
92 gcc_exec_prefix_setting="contains current directory"
95 gcc_exec_prefix_setting="ok"
99 AC_MSG_RESULT($gcc_exec_prefix_setting)
100 if test "$gcc_exec_prefix_setting" != "ok"; then
102 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
103 *** building gcc. Please change the environment variable
104 *** and run configure again.])
111 # Specify the local prefix
113 AC_ARG_WITH(local-prefix,
114 [AS_HELP_STRING([--with-local-prefix=DIR],
115 [specifies directory to put local include])],
116 [case "${withval}" in
117 yes) AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
119 *) local_prefix=$with_local_prefix ;;
122 # Default local prefix if it is empty
123 if test x$local_prefix = x; then
124 local_prefix=/usr/local
127 AC_ARG_WITH([native-system-header-dir],
128 [ --with-native-system-header-dir=dir
129 use dir as the directory to look for standard
130 system header files in. Defaults to /usr/include.],
132 case ${with_native_system_header_dir} in
133 yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
134 /* | [[A-Za-z]]:[[\\/]]*) ;;
135 *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
137 configured_native_system_header_dir="${withval}"
138 ], [configured_native_system_header_dir=])
140 AC_ARG_WITH(build-sysroot,
141 [AS_HELP_STRING([--with-build-sysroot=sysroot],
142 [use sysroot as the system root during the build])],
143 [if test x"$withval" != x ; then
144 SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
146 [SYSROOT_CFLAGS_FOR_TARGET=])
147 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
149 if test "x$prefix" = xNONE; then
150 test_prefix=/usr/local
154 if test "x$exec_prefix" = xNONE; then
155 test_exec_prefix=$test_prefix
157 test_exec_prefix=$exec_prefix
161 [AS_HELP_STRING([[--with-sysroot[=DIR]]],
162 [search for usr/lib, usr/include, et al, within DIR])],
164 case ${with_sysroot} in
166 */) with_sysroot=`echo $with_sysroot | sed 's,/$,,'` ;;
168 case ${with_sysroot} in
169 yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
170 *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
173 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
174 CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
176 case ${TARGET_SYSTEM_ROOT} in
177 "${test_prefix}"|"${test_prefix}/"*|\
178 "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
179 '${prefix}'|'${prefix}/'*|\
180 '${exec_prefix}'|'${exec_prefix}/'*)
181 t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
182 TARGET_SYSTEM_ROOT_DEFINE="$t"
187 TARGET_SYSTEM_ROOT_DEFINE=
188 CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
190 AC_SUBST(TARGET_SYSTEM_ROOT)
191 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
192 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
194 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
195 # passed in by the toplevel make and thus we'd get different behavior
196 # depending on where we built the sources.
198 # Specify the g++ header file directory
199 AC_ARG_WITH(gxx-include-dir,
200 [AS_HELP_STRING([--with-gxx-include-dir=DIR],
201 [specifies directory to put g++ header files])],
202 [case "${withval}" in
203 yes) AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
205 *) gcc_gxx_include_dir=$with_gxx_include_dir ;;
208 # If both --with-sysroot and --with-gxx-include-dir are passed, we interpolate
209 # the former in the latter and, upon success, compute gcc_gxx_include_dir as
210 # relative to the sysroot.
211 gcc_gxx_include_dir_add_sysroot=0
213 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
214 if test x${gcc_gxx_include_dir} = x; then
215 if test x${enable_version_specific_runtime_libs} = xyes; then
216 gcc_gxx_include_dir='${libsubdir}/include/c++'
218 libstdcxx_incdir='include/c++/$(version)'
219 if test x$host != x$target; then
220 libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
222 gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
224 elif test "${with_sysroot+set}" = set; then
225 gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
226 if test "${gcc_gxx_without_sysroot}"; then
227 gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
228 gcc_gxx_include_dir_add_sysroot=1
232 # Configuration for an alternate set of C++ headers.
233 gcc_gxx_libcxx_include_dir=
234 # Specify the alternate g++ header file directory
235 AC_ARG_WITH(gxx-libcxx-include-dir,
236 [AS_HELP_STRING([--with-gxx-libcxx-include-dir=DIR],
237 [specifies directory to find libc++ header files])],
238 [case "${withval}" in
239 yes) AC_MSG_ERROR(bad value ${withval} given for libc++ include directory) ;;
241 *) gcc_gxx_libcxx_include_dir=$with_gxx_libcxx_include_dir ;;
244 # If both --with-sysroot and --with-gxx-libcxx-include-dir are passed, we
245 # check to see if the latter starts with the former and, upon success, compute
246 # gcc_gxx_libcxx_include_dir as relative to the sysroot.
247 gcc_gxx_libcxx_include_dir_add_sysroot=0
249 if test x${gcc_gxx_libcxx_include_dir} != x; then
250 AC_DEFINE(ENABLE_STDLIB_OPTION, 1,
251 [Define if the -stdlib= option should be enabled.])
253 AC_DEFINE(ENABLE_STDLIB_OPTION, 0)
255 # ??? This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
256 if test x${gcc_gxx_libcxx_include_dir} = x; then
257 if test x${enable_version_specific_runtime_libs} = xyes; then
258 gcc_gxx_libcxx_include_dir='${libsubdir}/libc++_include/c++/v1'
260 libcxx_incdir='libc++_include/c++/$(version)/v1'
261 if test x$host != x$target; then
262 libcxx_incdir="$target_alias/$libcxx_incdir"
264 gcc_gxx_libcxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libcxx_incdir"
266 elif test "${with_sysroot+set}" = set; then
267 gcc_gxx_libcxx_without_sysroot=`expr "${gcc_gxx_libcxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
268 if test "${gcc_gxx_libcxx_without_sysroot}"; then
269 gcc_gxx_libcxx_include_dir="${gcc_gxx_libcxx_without_sysroot}"
270 gcc_gxx_libcxx_include_dir_add_sysroot=1
274 AC_ARG_WITH(cpp_install_dir,
275 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
276 [install the user visible C preprocessor in DIR
277 (relative to PREFIX) as well as PREFIX/bin])],
278 [if test x$withval = xyes; then
279 AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
280 elif test x$withval != xno; then
281 cpp_install_dir=$withval
284 # We would like to our source tree to be readonly. However when releases or
285 # pre-releases are generated, the flex/bison generated files as well as the
286 # various formats of manuals need to be included along with the rest of the
287 # sources. Therefore we have --enable-generated-files-in-srcdir to do
290 AC_MSG_CHECKING([whether to place generated files in the source directory])
291 dnl generated-files-in-srcdir is disabled by default
292 AC_ARG_ENABLE(generated-files-in-srcdir,
293 [AS_HELP_STRING([--enable-generated-files-in-srcdir],
294 [put copies of generated files in source dir
295 intended for creating source tarballs for users
296 without texinfo bison or flex])],
297 generated_files_in_srcdir=$enableval,
298 generated_files_in_srcdir=no)
300 AC_MSG_RESULT($generated_files_in_srcdir)
302 if test "$generated_files_in_srcdir" = "yes"; then
309 # -------------------
310 # Find default linker
311 # -------------------
315 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
316 gnu_ld_flag="$with_gnu_ld",
321 ld64_flag=yes # Darwin can only use a ld64-compatible linker.
322 dsymutil_flag=yes # Darwin uses dsymutil to link debug.
330 # With pre-defined ld
332 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
333 DEFAULT_LINKER="$with_ld")
334 if test x"${DEFAULT_LINKER+set}" = x"set"; then
335 if test ! -x "$DEFAULT_LINKER"; then
336 AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
337 elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
339 elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep ld64- > /dev/null; then
342 AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
343 [Define to enable the use of a default linker.])
346 AC_MSG_CHECKING([whether a default linker was specified])
347 if test x"${DEFAULT_LINKER+set}" = x"set"; then
348 if test x"$gnu_ld_flag" = x"no"; then
349 AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
351 AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
357 # With demangler in GNU ld
358 AC_ARG_WITH(demangler-in-ld,
359 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
360 demangler_in_ld="$with_demangler_in_ld",
363 # Allow the user to specify a dsymutil executable (used on Darwin only, so far)
364 AC_ARG_WITH(dsymutil,
365 [AS_HELP_STRING([--with-dsymutil], [arrange to use the specified dsymutil (full pathname)])],
366 DEFAULT_DSYMUTIL="$with_dsymutil")
369 if test x"${DEFAULT_DSYMUTIL+set}" = x"set"; then
370 if test ! -x "$DEFAULT_DSYMUTIL"; then
371 AC_MSG_ERROR([cannot execute: $DEFAULT_DSYMUTIL: check --with-dsymutil or env. var. DEFAULT_DSYMUTIL])
373 if dsymutil_vers=`$DEFAULT_DSYMUTIL -v /dev/null 2>&1`; then
377 AC_DEFINE_UNQUOTED(DEFAULT_DSYMUTIL,"$DEFAULT_DSYMUTIL",
378 [Define to enable the use of a default debug linker.])
381 AC_MSG_CHECKING([whether a default dsymutil was specified])
382 if test x"${DEFAULT_DSYMUTIL+set}" = x"set"; then
383 AC_MSG_RESULT([yes ($DEFAULT_DSYMUTIL)])
388 # ----------------------
389 # Find default assembler
390 # ----------------------
394 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
395 gas_flag="$with_gnu_as",
399 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
400 DEFAULT_ASSEMBLER="$with_as")
401 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
402 if test ! -x "$DEFAULT_ASSEMBLER"; then
403 AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
404 elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
407 AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
408 [Define to enable the use of a default assembler.])
411 AC_MSG_CHECKING([whether a default assembler was specified])
412 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
413 if test x"$gas_flag" = x"no"; then
414 AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
416 AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
426 # If a non-executable a.out is present (e.g. created by GNU as above even if
427 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
428 # file, even when creating an executable, so an execution test fails.
429 # Remove possible default executable files to avoid this.
431 # FIXME: This really belongs into AC_PROG_CC and can be removed once
432 # Autoconf includes it.
433 rm -f a.out a.exe b.out
435 # Find the native compiler
438 ACX_PROG_GNAT([-I"$srcdir"/ada/libgnat])
439 ACX_PROG_GDC([-I"$srcdir"/d])
441 # Do configure tests with the C++ compiler, since that's what we build with.
444 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
445 # optimizations to be activated explicitly by the toplevel.
448 *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[ ]]//" -e "s/-O[[gs]][[ ]]//" -e "s/-O[[0-9]]*[[ ]]//" `
449 CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[ ]]//" -e "s/-O[[gs]][[ ]]//" -e "s/-O[[0-9]]*[[ ]]//" ` ;;
455 # Determine PICFLAG for target gnatlib.
456 GCC_PICFLAG_FOR_TARGET
457 AC_SUBST(PICFLAG_FOR_TARGET)
459 # -------------------------
460 # Check C compiler features
461 # -------------------------
463 AC_USE_SYSTEM_EXTENSIONS
469 AC_CHECK_SIZEOF(ino_t)
470 AC_CHECK_SIZEOF(dev_t)
472 # Select the right stat being able to handle 64bit inodes, if needed.
473 if test "$enable_largefile" != no; then
474 case "$host, $build" in
475 *-*-aix*,*|*,*-*-aix*)
476 if test "$ac_cv_sizeof_ino_t" == "4" -a "$ac_cv_sizeof_dev_t" == 4; then
477 AC_DEFINE(HOST_STAT_FOR_64BIT_INODES, stat64x,
478 [Define which stat syscall is able to handle 64bit indodes.])
484 # sizeof(char) is 1 by definition.
485 AC_CHECK_SIZEOF(void *)
486 AC_CHECK_SIZEOF(short)
488 AC_CHECK_SIZEOF(long)
489 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
491 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
492 AC_MSG_ERROR([uint64_t or int64_t not found])
495 # check what underlying integer type int64_t uses
496 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
497 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
501 template <typename T> struct X { };
503 struct X<long> { typedef long t; };
504 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
505 if test "$ac_cv_int64_t_type" = "long"; then
506 AC_DEFINE(INT64_T_IS_LONG, 1,
507 [Define if int64_t uses long as underlying type.])
509 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
513 template <typename T> struct X { };
515 struct X<long long> { typedef long long t; };
516 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
519 AC_CACHE_CHECK(for std::swap in <utility>, ac_cv_std_swap_in_utility, [
520 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
522 ]], [[int a, b; std::swap(a,b);]])],[ac_cv_std_swap_in_utility=yes],[ac_cv_std_swap_in_utility=no])])
523 if test $ac_cv_std_swap_in_utility = yes; then
524 AC_DEFINE(HAVE_SWAP_IN_UTILITY, 1,
525 [Define if <utility> defines std::swap.])
528 # Check whether compiler is affected by placement new aliasing bug (PR 29286).
529 # If the host compiler is affected by the bug, and we build with optimization
530 # enabled (which happens e.g. when cross-compiling), the pool allocator may
531 # get miscompiled. Use -fno-strict-aliasing to work around this problem.
532 # Since there is no reliable feature check for the presence of this bug,
533 # we simply use a GCC version number check. (This should never trigger for
534 # stages 2 or 3 of a native bootstrap.)
536 if test "$GCC" = yes; then
537 saved_CXXFLAGS="$CXXFLAGS"
539 # The following test compilation will succeed if and only if $CXX accepts
540 # -fno-strict-aliasing *and* is older than GCC 4.3.
541 CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
542 AC_MSG_CHECKING([whether $CXX is affected by placement new aliasing bug])
543 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
544 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
545 #error compiler not affected by placement new aliasing bug
548 [AC_MSG_RESULT([yes]); aliasing_flags='-fno-strict-aliasing'],
549 [AC_MSG_RESULT([no])])
551 CXXFLAGS="$saved_CXXFLAGS"
553 AC_SUBST(aliasing_flags)
557 # ---------------------
558 # Warnings and checking
559 # ---------------------
561 # Check $CC warning features (if it's GCC).
562 # We want to use -pedantic, but we don't want warnings about
566 # * C++11 narrowing conversions in { }
567 # So, we only use -pedantic if we can disable those warnings.
569 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
570 AC_ARG_ENABLE(build-format-warnings,
571 AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
572 [],[enable_build_format_warnings=yes])
573 AS_IF([test $enable_build_format_warnings = no],
574 [wf_opt=-Wno-format],[wf_opt=])
575 ACX_PROG_CXX_WARNING_OPTS(
576 m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings ],
577 [-Wcast-qual $wf_opt])),
579 ACX_PROG_CC_WARNING_OPTS(
580 m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes ],
581 [])), [c_loose_warn])
582 ACX_PROG_CXX_WARNING_OPTS(
583 m4_quote(m4_do([-Wmissing-format-attribute ], [-Wconditionally-supported ],
584 [-Woverloaded-virtual])), [strict_warn])
585 ACX_PROG_CC_WARNING_OPTS(
586 m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
587 ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(
588 m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
589 [-Wno-overlength-strings])), [strict_warn])
590 ACX_PROG_CXX_WARNINGS_ARE_ERRORS([manual], [strict_warn])
592 # The above macros do nothing if the compiler is not GCC. However, the
593 # Makefile has more goo to add other flags, so these variables are used
594 # to enable warnings only for GCC.
597 if test "x$GCC" = "xyes"; then
598 warn_cflags='$(GCC_WARN_CFLAGS)'
599 warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
601 AC_SUBST(warn_cflags)
602 AC_SUBST(warn_cxxflags)
604 # Disable exceptions and RTTI if building with g++
605 ACX_PROG_CC_WARNING_OPTS(
606 m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
609 # Enable expensive internal checks
611 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
615 AC_ARG_ENABLE(checking,
616 [AS_HELP_STRING([[--enable-checking[=LIST]]],
617 [enable expensive run-time checks. With LIST,
618 enable only specific categories of checks.
619 Categories are: yes,no,all,none,release.
620 Flags are: assert,df,extra,fold,gc,gcac,gimple,misc,
621 rtlflag,rtl,runtime,tree,valgrind,types])],
622 [ac_checking_flags="${enableval}"],[
623 # Determine the default checks.
624 if test x$is_release = x ; then
625 ac_checking_flags=yes,extra
627 ac_checking_flags=release
629 IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="$IFS,"
630 for check in release $ac_checking_flags
633 # these set all the flags to specific states
634 yes) ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
635 ac_fold_checking= ; ac_gc_checking=1 ; ac_extra_checking= ;
636 ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
637 ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
638 ac_tree_checking=1 ; ac_valgrind_checking= ;
639 ac_types_checking=1 ;;
640 no|none) ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
641 ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
642 ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
643 ac_rtlflag_checking= ; ac_runtime_checking= ;
644 ac_tree_checking= ; ac_valgrind_checking= ;
645 ac_types_checking= ;;
646 all) ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
647 ac_fold_checking=1 ; ac_gc_checking=1 ; ac_extra_checking=1 ;
648 ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
649 ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
650 ac_tree_checking=1 ; ac_valgrind_checking= ;
651 ac_types_checking=1 ;;
652 release) ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
653 ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
654 ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
655 ac_rtlflag_checking= ; ac_runtime_checking=1 ;
656 ac_tree_checking= ; ac_valgrind_checking= ;
657 ac_types_checking= ;;
658 # these enable particular checks
659 assert) ac_assert_checking=1 ;;
660 df) ac_df_checking=1 ;;
661 extra) ac_extra_checking=1 ;;
662 fold) ac_fold_checking=1 ;;
663 gc) ac_gc_checking=1 ;;
664 gcac) ac_gc_always_collect=1 ;;
665 gimple) ac_gimple_checking=1 ;;
666 misc) ac_checking=1 ;;
667 rtl) ac_rtl_checking=1 ;;
668 rtlflag) ac_rtlflag_checking=1 ;;
669 runtime) ac_runtime_checking=1 ;;
670 tree) ac_tree_checking=1 ;;
671 types) ac_types_checking=1 ;;
672 valgrind) ac_valgrind_checking=1 ;;
673 *) AC_MSG_ERROR(unknown check category $check) ;;
679 if test x$ac_checking != x ; then
680 AC_DEFINE(CHECKING_P, 1,
681 [Define to 0/1 if you want more run-time sanity checks. This one gets a grab
682 bag of miscellaneous but relatively cheap checks.])
683 nocommon_flag=-fno-common
685 AC_DEFINE(CHECKING_P, 0)
687 AC_SUBST(nocommon_flag)
688 if test x$ac_extra_checking != x ; then
689 AC_DEFINE(ENABLE_EXTRA_CHECKING, 1,
690 [Define to 0/1 if you want extra run-time checking that might affect code
693 AC_DEFINE(ENABLE_EXTRA_CHECKING, 0)
695 if test x$ac_df_checking != x ; then
696 AC_DEFINE(ENABLE_DF_CHECKING, 1,
697 [Define if you want more run-time sanity checks for dataflow.])
699 if test x$ac_assert_checking != x ; then
700 AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
701 [Define if you want assertions enabled. This is a cheap check.])
703 if test x$ac_gimple_checking != x ; then
704 AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
705 [Define if you want operations on GIMPLE (the basic data structure of
706 the high-level optimizers) to be checked for dynamic type safety at
707 runtime. This is moderately expensive.])
709 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
710 if test x$ac_runtime_checking != x ; then
711 AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
712 [Define if you want runtime assertions enabled. This is a cheap check.])
714 if test x$ac_tree_checking != x ; then
715 AC_DEFINE(ENABLE_TREE_CHECKING, 1,
716 [Define if you want all operations on trees (the basic data
717 structure of the front ends) to be checked for dynamic type safety
718 at runtime. This is moderately expensive.
722 if test x$ac_types_checking != x ; then
723 AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
724 [Define if you want all gimple types to be verified after gimplifiation.
728 AC_SUBST(TREECHECKING)
729 if test x$ac_rtl_checking != x ; then
730 AC_DEFINE(ENABLE_RTL_CHECKING, 1,
731 [Define if you want all operations on RTL (the basic data structure
732 of the optimizer and back end) to be checked for dynamic type safety
733 at runtime. This is quite expensive.])
735 if test x$ac_rtlflag_checking != x ; then
736 AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
737 [Define if you want RTL flag accesses to be checked against the RTL
738 codes that are supported for each access macro. This is relatively
741 if test x$ac_gc_checking != x ; then
742 AC_DEFINE(ENABLE_GC_CHECKING, 1,
743 [Define if you want the garbage collector to do object poisoning and
744 other memory allocation checks. This is quite expensive.])
746 if test x$ac_gc_always_collect != x ; then
747 AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
748 [Define if you want the garbage collector to operate in maximally
749 paranoid mode, validating the entire heap and collecting garbage at
750 every opportunity. This is extremely expensive.])
752 if test x$ac_fold_checking != x ; then
753 AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
754 [Define if you want fold checked that it never destructs its argument.
755 This is quite expensive.])
757 valgrind_path_defines=
760 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
761 dnl # an if statement. This was the source of very frustrating bugs
762 dnl # in converting to autoconf 2.5x!
763 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
765 # It is certainly possible that there's valgrind but no valgrind.h.
766 # GCC relies on making annotations so we must have both.
767 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
768 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
769 [[#include <valgrind/memcheck.h>
770 #ifndef VALGRIND_DISCARD
771 #error VALGRIND_DISCARD not defined
773 [gcc_cv_header_valgrind_memcheck_h=yes],
774 [gcc_cv_header_valgrind_memcheck_h=no])
775 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
776 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
777 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
778 [[#include <memcheck.h>
779 #ifndef VALGRIND_DISCARD
780 #error VALGRIND_DISCARD not defined
782 [gcc_cv_header_memcheck_h=yes],
783 [gcc_cv_header_memcheck_h=no])
784 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
785 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
786 AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
787 [Define if valgrind's valgrind/memcheck.h header is installed.])
789 if test $gcc_cv_header_memcheck_h = yes; then
790 AC_DEFINE(HAVE_MEMCHECK_H, 1,
791 [Define if valgrind's memcheck.h header is installed.])
794 if test x$ac_valgrind_checking != x ; then
795 AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
796 [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
797 if test "x$valgrind_path" = "x" \
798 || (test $have_valgrind_h = no \
799 && test $gcc_cv_header_memcheck_h = no \
800 && test $gcc_cv_header_valgrind_memcheck_h = no); then
801 AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
803 valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
804 valgrind_command="$valgrind_path -q"
805 AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
806 [Define if you want to run subprograms and generated programs
807 through valgrind (a memory checker). This is extremely expensive.])
809 AC_SUBST(valgrind_path_defines)
810 AC_SUBST(valgrind_command)
812 # Enable code coverage collection
813 AC_ARG_ENABLE(coverage,
814 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
815 [enable compiler's code coverage collection.
816 Use to measure compiler performance and locate
817 unused parts of the compiler. With LEVEL, specify
818 optimization. Values are opt, noopt,
820 [case "${enableval}" in
822 coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0 -fkeep-static-functions"
825 coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2 -fkeep-static-functions"
828 # a.k.a. --disable-coverage
832 AC_MSG_ERROR(unknown coverage setting $enableval)
836 AC_SUBST(coverage_flags)
838 AC_ARG_ENABLE(gather-detailed-mem-stats,
839 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
840 [enable detailed memory allocation stats gathering])], [],
841 [enable_gather_detailed_mem_stats=no])
842 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
843 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
844 [Define to enable detailed memory allocation stats gathering.])
846 AC_ARG_ENABLE(valgrind-annotations,
847 [AS_HELP_STRING([--enable-valgrind-annotations],
848 [enable valgrind runtime interaction])], [],
849 [enable_valgrind_annotations=no])
850 if test x$enable_valgrind_annotations != xno \
851 || test x$ac_valgrind_checking != x; then
852 if (test $have_valgrind_h = no \
853 && test $gcc_cv_header_memcheck_h = no \
854 && test $gcc_cv_header_valgrind_memcheck_h = no); then
855 AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
857 AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
858 [Define to get calls to the valgrind runtime enabled.])
861 # -------------------------------
862 # Miscenalleous configure options
863 # -------------------------------
865 # Determine whether or not multilibs are enabled.
866 AC_ARG_ENABLE(multilib,
867 [AS_HELP_STRING([--enable-multilib],
868 [enable library support for multiple ABIs])],
869 [], [enable_multilib=yes])
870 AC_SUBST(enable_multilib)
872 # Determine whether or not multiarch is enabled.
873 AC_ARG_ENABLE(multiarch,
874 [AS_HELP_STRING([--enable-multiarch],
875 [enable support for multiarch paths])],
876 [case "${enableval}" in
877 yes|no|auto) enable_multiarch=$enableval;;
878 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
879 esac], [enable_multiarch=auto])
880 if test x${enable_multiarch} = xauto; then
881 if test x${with_native_system_header_dir} != x; then
882 ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
885 if test x$host != x$target && test "x$with_sysroot" = x; then
886 ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
890 if test x${enable_multiarch} = xyes; then
891 AC_DEFINE(ENABLE_MULTIARCH, 1, [If --with-multiarch option is used])
893 AC_MSG_CHECKING(for multiarch configuration)
894 AC_SUBST(enable_multiarch)
895 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
897 # needed for setting the multiarch name for soft-float/hard-float ABIs
901 # default stack clash protection guard size as power of twos in bytes.
902 # Please keep these in sync with params.def.
906 # Keep the default value when the option is not used to 0, this allows us to
907 # distinguish between the cases where the user specifially set a value via
908 # configure and when the normal default value is used.
909 AC_ARG_WITH(stack-clash-protection-guard-size,
910 [AS_HELP_STRING([--with-stack-clash-protection-guard-size=size],
911 [Set the default stack clash protection guard size for specific targets as a power of two in bytes.])],
912 [DEFAULT_STK_CLASH_GUARD_SIZE="$with_stack_clash_protection_guard_size"], [DEFAULT_STK_CLASH_GUARD_SIZE=0])
913 if test $DEFAULT_STK_CLASH_GUARD_SIZE -ne 0 \
914 && (test $DEFAULT_STK_CLASH_GUARD_SIZE -lt $stk_clash_min \
915 || test $DEFAULT_STK_CLASH_GUARD_SIZE -gt $stk_clash_max); then
916 AC_MSG_ERROR(m4_normalize([
917 Invalid value $DEFAULT_STK_CLASH_GUARD_SIZE for --with-stack-clash-protection-guard-size. \
918 Must be between $stk_clash_min and $stk_clash_max.]))
921 AC_DEFINE_UNQUOTED(DEFAULT_STK_CLASH_GUARD_SIZE, $DEFAULT_STK_CLASH_GUARD_SIZE,
922 [Define to larger than zero set the default stack clash protector size.])
924 # Enable __cxa_atexit for C++.
925 AC_ARG_ENABLE(__cxa_atexit,
926 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
929 # Enable C extension for decimal float if target supports it.
930 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
932 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
933 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
934 [Define to 1 to enable decimal float extension to C.])
936 # Use default_decimal_float for dependency.
937 enable_decimal_float=$default_decimal_float
939 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
940 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
941 [Define to 1 to specify that we are using the BID decimal floating
942 point format instead of DPD])
944 # Enable C extension for fixed-point arithmetic.
945 AC_ARG_ENABLE(fixed-point,
946 [AS_HELP_STRING([--enable-fixed-point],
947 [enable fixed-point arithmetic extension to C])],
952 enable_fixed_point=yes
956 enable_fixed_point=yes
959 enable_fixed_point=yes
962 AC_MSG_WARN([fixed-point is not supported for this target, ignored])
963 enable_fixed_point=no
967 AC_SUBST(enable_fixed_point)
969 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
970 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
971 [Define to 1 to enable fixed-point arithmetic extension to C.])
974 # Pass with no value to take the default
975 # Pass with a value to specify a thread package
976 AC_ARG_ENABLE(threads,
977 [AS_HELP_STRING([[--enable-threads[=LIB]]],
978 [enable thread usage for target GCC,
979 using LIB thread package])],,
983 [AS_HELP_STRING([--enable-tls],
984 [enable or disable generation of tls code
985 overriding the assembler check for tls support])],
989 *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
990 Valid choices are 'yes' and 'no'.]) ;;
994 AC_ARG_ENABLE(vtable-verify,
995 [AS_HELP_STRING([--enable-vtable-verify],
996 [enable vtable verification feature])],,
997 [enable_vtable_verify=no])
998 vtable_verify=`if test x$enable_vtable_verify = xyes; then echo 1; else echo 0; fi`
999 AC_DEFINE_UNQUOTED(ENABLE_VTABLE_VERIFY, $vtable_verify,
1000 [Define 0/1 if vtable verification feature is enabled.])
1002 AC_ARG_ENABLE(analyzer,
1003 [AS_HELP_STRING([--disable-analyzer],
1004 [disable -fanalyzer static analyzer])],
1005 if test x$enable_analyzer = xno; then
1011 AC_DEFINE_UNQUOTED(ENABLE_ANALYZER, $analyzer,
1012 [Define 0/1 if static analyzer feature is enabled.])
1014 AC_ARG_ENABLE(objc-gc,
1015 [AS_HELP_STRING([--enable-objc-gc],
1016 [enable the use of Boehm's garbage collector with
1017 the GNU Objective-C runtime])],
1018 if test x$enable_objc_gc = xno; then
1026 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2 (or later)])],
1027 dwarf2="$with_dwarf2",
1030 AC_ARG_ENABLE(shared,
1031 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
1033 case $enable_shared in
1037 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
1038 for pkg in $enableval; do
1039 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
1046 ], [enable_shared=yes])
1047 AC_SUBST(enable_shared)
1050 [ --disable-gcov don't provide libgcov and related host tools],
1051 [], [case $target in
1060 AC_SUBST(enable_gcov)
1063 [AS_HELP_STRING([--with-specs=SPECS],
1064 [add SPECS to driver command-line processing])],
1065 [CONFIGURE_SPECS=$withval],
1068 AC_SUBST(CONFIGURE_SPECS)
1070 ACX_PKGVERSION([GCC])
1071 ACX_BUGURL([https://gcc.gnu.org/bugs/])
1073 # Allow overriding the default URL for documentation
1074 AC_ARG_WITH(documentation-root-url,
1075 AS_HELP_STRING([--with-documentation-root-url=URL],
1076 [Root for documentation URLs]),
1078 yes) AC_MSG_ERROR([documentation root URL not specified]) ;;
1079 no) AC_MSG_ERROR([documentation root URL not specified]) ;;
1080 */) DOCUMENTATION_ROOT_URL="$withval" ;;
1081 *) AC_MSG_ERROR([documentation root URL does not end with /]) ;;
1083 DOCUMENTATION_ROOT_URL="https://gcc.gnu.org/onlinedocs/"
1085 AC_DEFINE_UNQUOTED(DOCUMENTATION_ROOT_URL,"$DOCUMENTATION_ROOT_URL",
1086 [Define to the root for documentation URLs.])
1088 # Allow overriding the default URL for GCC changes
1089 AC_ARG_WITH(changes-root-url,
1090 AS_HELP_STRING([--with-changes-root-url=URL],
1091 [Root for GCC changes URLs]),
1093 yes) AC_MSG_ERROR([changes root URL not specified]) ;;
1094 no) AC_MSG_ERROR([changes root URL not specified]) ;;
1095 */) CHANGES_ROOT_URL="$withval" ;;
1096 *) AC_MSG_ERROR([changes root URL does not end with /]) ;;
1098 CHANGES_ROOT_URL="https://gcc.gnu.org/"
1100 AC_DEFINE_UNQUOTED(CHANGES_ROOT_URL,"$CHANGES_ROOT_URL",
1101 [Define to the root for URLs about GCC changes.])
1103 # Sanity check enable_languages in case someone does not run the toplevel
1104 # configure # script.
1105 AC_ARG_ENABLE(languages,
1106 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
1107 [case ,${enable_languages}, in
1109 # go safe -- we cannot be much sure without the toplevel
1111 # analysis of which target libs are present and usable
1115 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
1120 enable_languages=c,${enable_languages}
1123 [enable_languages=c])
1125 # If top-level libada has been disabled, then wire in install-gnatlib
1126 # invocation with `make install', so that one can build and install
1127 # the library manually with `make -C gcc all gnatlib gnattools install'.
1128 if test x"$enable_libada" = xno; then
1129 gnat_install_lib=gnat-install-lib
1133 AC_SUBST(gnat_install_lib)
1135 if test x"$enable_as_accelerator_for" != x; then
1136 AC_DEFINE(ACCEL_COMPILER, 1,
1137 [Define if this compiler should be built as the offload target compiler.])
1138 enable_as_accelerator=yes
1139 sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
1140 program_transform_name=`echo $program_transform_name | sed $sedscript`
1141 accel_dir_suffix=/accel/${target_noncanonical}
1142 real_target_noncanonical=${enable_as_accelerator_for}
1144 AC_SUBST(enable_as_accelerator)
1145 AC_SUBST(real_target_noncanonical)
1146 AC_SUBST(accel_dir_suffix)
1148 for tgt in `echo $enable_offload_targets | sed 's/,/ /g'`; do
1149 tgt=`echo $tgt | sed 's/=.*//'`
1154 omp_device_property=omp-device-properties-gcn
1155 omp_device_property_tmake_file="${omp_device_property_tmake_file} \$(srcdir)/config/gcn/t-omp-device"
1158 omp_device_property=omp-device-properties-nvptx
1159 omp_device_property_tmake_file="${omp_device_property_tmake_file} \$(srcdir)/config/nvptx/t-omp-device"
1162 AC_MSG_ERROR([unknown offload target specified])
1165 omp_device_properties="${omp_device_properties} ${tgt}=${omp_device_property}"
1166 omp_device_property_deps="${omp_device_property_deps} ${omp_device_property}"
1168 if test x"$offload_targets" = x; then
1169 offload_targets=$tgt
1171 offload_targets="$offload_targets,$tgt"
1174 AC_SUBST(omp_device_properties)
1175 AC_SUBST(omp_device_property_deps)
1177 AC_DEFINE_UNQUOTED(OFFLOAD_TARGETS, "$offload_targets",
1178 [Define to offload targets, separated by commas.])
1179 if test x"$enable_offloading" != x; then
1180 AC_DEFINE(ENABLE_OFFLOADING, 1,
1181 [Define this to enable support for offloading.])
1183 AC_DEFINE(ENABLE_OFFLOADING, 0,
1184 [Define this to enable support for offloading.])
1187 if test "x$enable_offload_defaulted" = xyes; then
1188 AC_DEFINE(OFFLOAD_DEFAULTED, 1,
1189 [Define to 1 to if -foffload is defaulted])
1192 AC_ARG_WITH(multilib-list,
1193 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, ARM, AVR, OR1K, RISC-V, SH and x86-64 only)])],
1195 with_multilib_list=default)
1197 AC_ARG_WITH(multilib-generator,
1198 [AS_HELP_STRING([--with-multilib-generator], [Multi-libs configuration string (RISC-V only)])],
1200 with_multilib_generator=default)
1202 # -------------------------
1203 # Checks for other programs
1204 # -------------------------
1208 # Find some useful tools
1210 # We need awk to create options.cc and options.h.
1211 # Bail out if it's missing.
1213 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
1220 AC_SUBST(ranlib_flags)
1224 # See if cmp has --ignore-initial.
1225 gcc_AC_PROG_CMP_IGNORE_INITIAL
1227 # See if we have the mktemp command.
1228 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
1230 # See if makeinfo has been installed and is modern enough
1231 # that we can use it.
1232 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
1233 [GNU texinfo.* \([0-9][0-9.]*\)],
1234 [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
1235 if test $gcc_cv_prog_makeinfo_modern = no; then
1237 *** Makeinfo is missing or too old.
1238 *** Info documentation will not be built.])
1243 AC_SUBST(BUILD_INFO)
1245 # Is pod2man recent enough to regenerate manpages?
1246 AC_MSG_CHECKING([for recent Pod::Man])
1247 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
1249 GENERATED_MANPAGES=generated-manpages
1254 AC_SUBST(GENERATED_MANPAGES)
1256 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
1259 dnl Don't use AC_PROG_LEX; we insist on flex.
1260 dnl LEXLIB is not useful in gcc.
1261 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
1264 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
1267 ACX_CHECK_PROG_VER(PYTHON, python3, --version,
1268 [Python.* \([0-9][0-9.]*\)],
1269 [3.[4-9]*|3.[1-9][0-9]*|[4-9].*|[1-9][0-9]*])
1270 if test $gcc_cv_prog_python3_modern = no; then
1272 *** Python3 is missing.
1273 *** Documentation for modula-2 will not include the target SYSTEM module.])
1278 AC_SUBST(HAVE_PYTHON)
1280 # Binutils are not build modules, unlike bison/flex/makeinfo. So we
1281 # check for build == host before using them.
1284 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
1285 && test -d ../binutils ; then
1286 NM='${objdir}/../binutils/nm-new'
1288 AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
1292 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
1293 && test -d ../binutils ; then
1294 AR='${objdir}/../binutils/ar'
1296 AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
1299 # The jit documentation looks better if built with sphinx, but can be
1300 # built with texinfo if sphinx is not available.
1301 # Set "doc_build_sys" to "sphinx" or "texinfo" accordingly.
1302 AC_CHECK_PROG(doc_build_sys, sphinx-build, sphinx, texinfo)
1304 # --------------------
1305 # Checks for C headers
1306 # --------------------
1308 # Need to reject headers which give warnings, so that the -Werror bootstrap
1309 # works later. *sigh* This needs to come before all header checks.
1316 AC_HEADER_TIOCGWINSZ
1317 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
1318 fcntl.h ftw.h unistd.h sys/auxv.h sys/file.h sys/time.h sys/mman.h \
1319 sys/resource.h sys/param.h sys/times.h sys/stat.h sys/locking.h \
1320 direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
1322 # Check for thread headers.
1323 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
1324 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
1326 # These tests can't be done till we know if we have limits.h.
1330 # ----------------------
1331 # Checks for C++ headers
1332 # ----------------------
1334 dnl Autoconf will give an error in the configure script if there is no
1335 dnl C++ preprocessor. Hack to prevent that.
1336 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1338 m4_popdef([AC_MSG_ERROR])[]dnl
1340 AC_CHECK_HEADERS(unordered_map)
1341 AC_CHECK_HEADERS(tr1/unordered_map)
1342 AC_CHECK_HEADERS(ext/hash_map)
1345 # Dependency checking.
1349 AC_CONFIG_COMMANDS([gccdepdir],[
1350 ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1351 for lang in $subdirs c-family common analyzer rtl-ssa
1353 ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1354 done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1356 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1363 # These libraries may be used by collect2.
1364 # We may need a special search path to get them linked.
1365 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1367 for libs in '' -lld -lmld \
1368 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1369 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1372 AC_TRY_LINK_FUNC(ldopen,
1373 [gcc_cv_collect2_libs="$libs"; break])
1376 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1377 case $gcc_cv_collect2_libs in
1379 *) COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1381 AC_SUBST(COLLECT2_LIBS)
1383 # When building Ada code on Alpha, we need exc_resume which is usually in
1384 # -lexc. So test for it.
1387 AC_SEARCH_LIBS(exc_resume, exc)
1390 AC_SUBST(GNAT_LIBEXC)
1392 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1395 AC_SEARCH_LIBS(kstat_open, kstat)
1396 EXTRA_GCC_LIBS="$LIBS"
1398 AC_SUBST(EXTRA_GCC_LIBS)
1400 # Solaris needs libsocket and libnsl for socket functions before 11.4.
1401 # C++ needs those for libcody.
1409 # Some systems put ldexp and frexp in libm instead of libc; assume
1410 # they're both in the same place. jcf-dump needs them.
1413 AC_SEARCH_LIBS(ldexp, m)
1418 # Some systems need dlopen
1421 AC_SEARCH_LIBS(dlopen, dl)
1426 # Use <inttypes.h> only if it exists,
1427 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1429 AC_MSG_CHECKING(for inttypes.h)
1430 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1431 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1432 [[#define __STDC_FORMAT_MACROS
1433 #include <sys/types.h>
1434 #include <inttypes.h>]],
1439 [gcc_cv_header_inttypes_h=yes],
1440 [gcc_cv_header_inttypes_h=no])])
1441 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1442 if test $gcc_cv_header_inttypes_h = yes; then
1443 AC_DEFINE(HAVE_INTTYPES_H, 1,
1444 [Define if you have a working <inttypes.h> header file.])
1447 # Look for the ZSTD package.
1450 AC_SUBST(ZSTD_INCLUDE)
1454 AC_SUBST(ZSTD_CPPFLAGS)
1455 AC_SUBST(ZSTD_LDFLAGS)
1457 [AS_HELP_STRING([--with-zstd=PATH],
1458 [specify prefix directory for installed zstd library.
1459 Equivalent to --with-zstd-include=PATH/include
1460 plus --with-zstd-lib=PATH/lib])])
1461 AC_ARG_WITH(zstd-include,
1462 [AS_HELP_STRING([--with-zstd-include=PATH],
1463 [specify directory for installed zstd include files])])
1464 AC_ARG_WITH(zstd-lib,
1465 [AS_HELP_STRING([--with-zstd-lib=PATH],
1466 [specify directory for the installed zstd library])])
1467 case "x$with_zstd" in
1473 *) ZSTD_INCLUDE=$with_zstd/include
1474 ZSTD_LIB=$with_zstd/lib
1478 if test "x$with_zstd" != xno; then
1479 if test "x$with_zstd_include" != x; then
1480 ZSTD_INCLUDE=$with_zstd_include
1482 if test "x$with_zstd_lib" != x; then
1483 ZSTD_LIB=$with_zstd_lib
1485 if test "x$ZSTD_INCLUDE" != x \
1486 && test "x$ZSTD_INCLUDE" != xno; then
1487 ZSTD_CPPFLAGS=-I$ZSTD_INCLUDE
1489 if test "x$ZSTD_LIB" != x \
1490 && test "x$ZSTD_LIB" != xno; then
1491 ZSTD_LDFLAGS=-L$ZSTD_LIB
1494 CXXFLAGS="$CXXFLAGS $ZSTD_CPPFLAGS"
1495 LDFLAGS="$LDFLAGS $ZSTD_LDFLAGS"
1497 AC_MSG_CHECKING(for zstd.h)
1498 AC_CACHE_VAL(gcc_cv_header_zstd_h,
1499 # We require version 1.3.0 or later. This is the first version that has
1500 # ZSTD_getFrameContentSize.
1501 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1503 #if ZSTD_VERSION_NUMBER < 10300
1504 #error "need zstd 1.3.0 or better"
1506 [gcc_cv_header_zstd_h=yes],
1507 [gcc_cv_header_zstd_h=no])])
1508 AC_MSG_RESULT($gcc_cv_header_zstd_h)
1509 if test $gcc_cv_header_zstd_h = yes; then
1510 AC_DEFINE(HAVE_ZSTD_H, 1,
1511 [Define if you have a working <zstd.h> header file.])
1512 elif test "x$with_zstd" != x; then
1513 as_fn_error $? "Unable to find zstd.h. See config.log for details." "$LINENO" 5
1516 # LTO can use zstd compression algorithm
1519 AC_SEARCH_LIBS(ZSTD_compress, zstd)
1525 dnl Disabled until we have a complete test for buggy enum bitfields.
1526 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1528 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1529 ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1530 fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1531 fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1532 putchar_unlocked putc_unlocked)
1533 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoq \
1534 popen sysconf strsignal getrusage nl_langinfo \
1535 gettimeofday mbstowcs wcswidth mmap posix_fallocate setlocale \
1536 gcc_UNLOCKED_FUNCS madvise mallinfo mallinfo2 fstatat getauxval)
1538 if test x$ac_cv_func_mbstowcs = xyes; then
1539 AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1540 [ AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1546 [gcc_cv_func_mbstowcs_works=yes],
1547 [gcc_cv_func_mbstowcs_works=no],
1548 [gcc_cv_func_mbstowcs_works=yes])])
1549 if test x$gcc_cv_func_mbstowcs_works = xyes; then
1550 AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1551 [Define this macro if mbstowcs does not crash when its
1552 first argument is NULL.])
1556 AC_CHECK_TYPE(ssize_t, int)
1557 AC_CHECK_TYPE(caddr_t, char *)
1558 AC_CHECK_TYPE(sighander_t,
1559 AC_DEFINE(HAVE_SIGHANDLER_T, 1,
1560 [Define if <sys/signal.h> defines sighandler_t]),
1563 GCC_AC_FUNC_MMAP_BLACKLIST
1567 # Under VMS, vfork works very differently than on Unix. The standard test
1568 # won't work, and it isn't easily adaptable. It makes more sense to
1570 ac_cv_func_vfork_works=yes
1577 # Until we have in-tree GNU iconv:
1579 if test -f "$LTLIBICONV"; then
1580 LIBICONV_DEP=$LTLIBICONV
1582 AC_SUBST(LIBICONV_DEP)
1588 # We will need to find libiberty.h and ansidecl.h
1589 saved_CFLAGS="$CFLAGS"
1590 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1591 saved_CXXFLAGS="$CXXFLAGS"
1592 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1594 # gcc_AC_CHECK_DECLS doesn't support overloaded functions, so use the
1595 # normal autoconf function for these. But force definition of
1596 # HAVE_DECL_BASENAME like gcc_AC_CHECK_DECLS does, to suppress the bizarre
1597 # basename handling in libiberty.h.
1598 AC_CHECK_DECLS([basename(const char*), strstr(const char*,const char*)], , ,[
1599 #undef HAVE_DECL_BASENAME
1600 #define HAVE_DECL_BASENAME 1
1601 #include "ansidecl.h"
1602 #include "system.h"])
1604 gcc_AC_CHECK_DECLS(getenv atol atoll asprintf sbrk abort atof getcwd getwd \
1605 madvise stpcpy strnlen strsignal strverscmp \
1606 strtol strtoul strtoll strtoull setenv unsetenv \
1607 errno snprintf vsnprintf vasprintf malloc realloc calloc \
1608 free getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1609 #include "ansidecl.h"
1610 #include "system.h"])
1612 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1613 #include "ansidecl.h"
1615 #ifdef HAVE_SYS_RESOURCE_H
1616 #include <sys/resource.h>
1620 gcc_AC_CHECK_DECLS(mallinfo mallinfo2, , ,[
1621 #include "ansidecl.h"
1623 #ifdef HAVE_MALLOC_H
1628 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1629 #include "ansidecl.h"
1631 #ifdef HAVE_SYS_RESOURCE_H
1632 #include <sys/resource.h>
1634 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1635 [Define to `long' if <sys/resource.h> doesn't define.])])
1637 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1638 # FREAD and FWRITE macros. Fortunately, for GCC's single usage of ldgetname
1639 # in collect2.cc, <fcntl.h> isn't visible, but the configure test below needs
1640 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1641 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1642 #include "ansidecl.h"
1651 gcc_AC_CHECK_DECLS(times, , ,[
1652 #include "ansidecl.h"
1654 #ifdef HAVE_SYS_TIMES_H
1655 #include <sys/times.h>
1659 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1660 #include "ansidecl.h"
1665 # More time-related stuff.
1666 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1667 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1668 #include "ansidecl.h"
1670 #ifdef HAVE_SYS_TIMES_H
1671 #include <sys/times.h>
1673 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1674 if test $ac_cv_struct_tms = yes; then
1675 AC_DEFINE(HAVE_STRUCT_TMS, 1,
1676 [Define if <sys/times.h> defines struct tms.])
1679 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1680 # revisit after autoconf 2.50.
1681 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1682 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1683 #include "ansidecl.h"
1685 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1686 if test $gcc_cv_type_clock_t = yes; then
1687 AC_DEFINE(HAVE_CLOCK_T, 1,
1688 [Define if <time.h> defines clock_t.])
1691 # Check if F_SETLKW is supported by fcntl.
1692 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1693 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1694 #include <fcntl.h>]], [[
1700 return fcntl (1, F_SETLKW, &fl);]])],
1701 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1702 if test $ac_cv_f_setlkw = yes; then
1703 AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1704 [Define if F_SETLKW supported by fcntl.])
1707 # Check if O_CLOEXEC is defined by fcntl
1708 AC_CACHE_CHECK(for O_CLOEXEC, ac_cv_o_cloexec, [
1709 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1710 #include <fcntl.h>]], [[
1711 return open ("/dev/null", O_RDONLY | O_CLOEXEC);]])],
1712 [ac_cv_o_cloexec=yes],[ac_cv_o_cloexec=no])])
1713 if test $ac_cv_o_cloexec = yes; then
1714 AC_DEFINE(HOST_HAS_O_CLOEXEC, 1,
1715 [Define if O_CLOEXEC supported by fcntl.])
1718 # Check if O_NONBLOCK is defined by fcntl
1719 AC_CHECK_HEADERS([fcntl.h])
1720 AC_CHECK_DECL(O_NONBLOCK,,,[#include <fcntl.h>])
1721 if test $ac_cv_have_decl_O_NONBLOCK = yes; then
1722 AC_DEFINE(HOST_HAS_O_NONBLOCK, 1,
1723 [Define if O_NONBLOCK supported by fcntl.])
1727 # C++ Modules would like some networking features to provide the mapping
1728 # server. You can still use modules without them though.
1729 # The following network-related checks could probably do with some
1730 # Windows and other non-linux defenses and checking.
1732 # Local socket connectivity wants AF_UNIX networking
1733 # Check for AF_UNIX networking
1734 AC_CACHE_CHECK(for AF_UNIX, ac_cv_af_unix, [
1735 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1736 #include <sys/types.h>
1737 #include <sys/socket.h>
1739 #include <netinet/in.h>]],[[
1741 un.sun_family = AF_UNSPEC;
1742 int fd = socket (AF_UNIX, SOCK_STREAM, 0);
1743 connect (fd, (sockaddr *)&un, sizeof (un));]])],
1744 [ac_cv_af_unix=yes],
1745 [ac_cv_af_unix=no])])
1746 if test $ac_cv_af_unix = yes; then
1747 AC_DEFINE(HAVE_AF_UNIX, 1,
1748 [Define if AF_UNIX supported.])
1751 # Remote socket connectivity wants AF_INET6 networking
1752 # Check for AF_INET6 networking
1753 AC_CACHE_CHECK(for AF_INET6, ac_cv_af_inet6, [
1754 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1755 #include <sys/types.h>
1756 #include <sys/socket.h>
1757 #include <netinet/in.h>
1758 #include <netdb.h>]],[[
1760 in6.sin6_family = AF_UNSPEC;
1761 struct addrinfo *addrs = 0;
1762 struct addrinfo hints;
1764 hints.ai_family = AF_INET6;
1765 hints.ai_socktype = SOCK_STREAM;
1766 hints.ai_protocol = 0;
1767 hints.ai_canonname = 0;
1770 int e = getaddrinfo ("localhost", 0, &hints, &addrs);
1771 const char *str = gai_strerror (e);
1772 freeaddrinfo (addrs);
1773 int fd = socket (AF_INET6, SOCK_STREAM, 0);
1774 connect (fd, (sockaddr *)&in6, sizeof (in6));]])],
1775 [ac_cv_af_inet6=yes],
1776 [ac_cv_af_inet6=no])])
1777 if test $ac_cv_af_inet6 = yes; then
1778 AC_DEFINE(HAVE_AF_INET6, 1,
1779 [Define if AF_INET6 supported.])
1782 # Check if _LK_LOCK is supported by _locking
1783 AC_CACHE_CHECK(for _LK_LOCK, ac_cv_lk_lock, [
1784 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1786 #include <sys/locking.h>]], [[
1788 return _locking (fd, _LK_LOCK, 0);]])],
1789 [ac_cv_lk_lock=yes],[ac_cv_lk_lock=no])])
1790 if test $ac_cv_lk_lock = yes; then
1791 AC_DEFINE(HOST_HAS_LK_LOCK, 1,
1792 [Define if _LK_LOC supported by _locking.])
1795 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1796 CFLAGS="$saved_CFLAGS"
1797 CXXFLAGS="$saved_CXXFLAGS"
1799 # mkdir takes a single argument on some systems.
1800 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1808 # With Setjmp/Longjmp based exception handling.
1809 AC_ARG_ENABLE(sjlj-exceptions,
1810 [AS_HELP_STRING([--enable-sjlj-exceptions],
1811 [arrange to use setjmp/longjmp exception handling])],
1812 [force_sjlj_exceptions=yes],
1815 force_sjlj_exceptions=yes
1819 force_sjlj_exceptions=no
1822 if test $force_sjlj_exceptions = yes; then
1823 sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1824 AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1825 [Define 0/1 to force the choice for exception handling model.])
1828 # --------------------------------------------------------
1829 # Build, host, and target specific configuration fragments
1830 # --------------------------------------------------------
1832 # Collect build-machine-specific information.
1833 . ${srcdir}/config.build || exit 1
1835 # Collect host-machine-specific information.
1836 . ${srcdir}/config.host || exit 1
1840 # Collect target-machine-specific information.
1841 . ${srcdir}/config.gcc || exit 1
1843 extra_objs="${host_extra_objs} ${extra_objs}"
1844 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1846 # Default the target-machine variables that were not explicitly set.
1847 if test x"$tm_file" = x
1848 then tm_file=$cpu_type/$cpu_type.h; fi
1850 if test x"$extra_headers" = x
1851 then extra_headers=; fi
1853 if test x$md_file = x
1854 then md_file=$cpu_type/$cpu_type.md; fi
1856 if test x$out_file = x
1857 then out_file=$cpu_type/$cpu_type.cc; fi
1859 if test x"$tmake_file" = x
1860 then tmake_file=$cpu_type/t-$cpu_type
1863 # Support --enable-initfini-array.
1864 if test x$enable_initfini_array != xno; then
1865 tm_file="${tm_file} initfini-array.h"
1868 if test x"$dwarf2" = xyes
1869 then tm_file="$tm_file tm-dwarf2.h"
1872 # Say what files are being used for the output code and MD file.
1873 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1874 echo "Using \`$srcdir/config/$md_file' as machine description file."
1876 # If any of the xm_file variables contain nonexistent files, warn
1877 # about them and drop them.
1880 for x in $build_xm_file; do
1881 if test -f $srcdir/config/$x
1883 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1889 for x in $host_xm_file; do
1890 if test -f $srcdir/config/$x
1892 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1898 for x in $xm_file; do
1899 if test -f $srcdir/config/$x
1901 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1907 for f in $tm_file; do
1910 if test $count = ax; then
1911 echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1913 echo "Using the following target machine macro files:"
1914 for f in $tm_file; do
1915 echo " $srcdir/config/$f"
1919 if test x$use_long_long_for_widest_fast_int = xyes; then
1920 AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1921 [Define to 1 if the 'long long' type is wider than 'long' but still
1922 efficiently supported by the host hardware.])
1925 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1926 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1928 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1929 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1932 for f in $host_xm_file; do
1935 if test $count = a; then
1937 elif test $count = ax; then
1938 echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1940 echo "Using the following host machine macro files:"
1941 for f in $host_xm_file; do
1942 echo " $srcdir/config/$f"
1945 echo "Using ${out_host_hook_obj} for host machine hooks."
1947 if test "$host_xm_file" != "$build_xm_file"; then
1949 for f in $build_xm_file; do
1952 if test $count = a; then
1954 elif test $count = ax; then
1955 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1957 echo "Using the following build machine macro files:"
1958 for f in $build_xm_file; do
1959 echo " $srcdir/config/$f"
1964 if test -n "$configured_native_system_header_dir"; then
1965 native_system_header_dir=$configured_native_system_header_dir
1967 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1968 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1972 AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1973 gcc_cv_mcontext_underscores,
1974 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
1975 #include <sys/cdefs.h>
1976 #include <sys/signal.h>
1977 #include <ucontext.h>
1978 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1980 gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1981 if test $gcc_cv_mcontext_underscores = yes; then
1982 AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1983 [mcontext_t fields start with __])
1992 # Check if a valid thread package
1993 case ${enable_threads} in
1996 target_thread_file='single'
2000 target_thread_file='single'
2002 aix | dce | lynx | mipssde | posix | rtems | \
2003 single | tpf | vxworks | win32 | mcf)
2004 target_thread_file=${enable_threads}
2007 echo "${enable_threads} is an unknown thread package" 1>&2
2012 if test x${thread_file} = x; then
2013 # No thread file set by target-specific clauses in config.gcc,
2014 # so use file chosen by default logic above
2015 thread_file=${target_thread_file}
2023 if test x$enable___cxa_atexit = xyes || \
2024 test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
2025 if test x$host = x$target; then
2027 # mingw32 doesn't have __cxa_atexit but uses atexit registration
2028 # keyed to flag_use_cxa_atexit
2036 AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
2037 [echo "__cxa_atexit can't be enabled on this target"])
2041 # We can't check for __cxa_atexit when building a cross, so assume
2045 if test x$use_cxa_atexit = xyes; then
2046 AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
2047 [Define if you want to use __cxa_atexit, rather than atexit, to
2048 register C++ destructors for local statics and global objects.
2049 This is essential for fully standards-compliant handling of
2050 destructors, but requires __cxa_atexit in libc.])
2054 # Look for a file containing extra machine modes.
2055 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
2056 extra_modes_file='$(srcdir)'/config/${extra_modes}
2057 AC_SUBST(extra_modes_file)
2058 AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
2059 [Define to the name of a file containing a list of extra machine modes
2060 for this architecture.])
2063 # Convert extra_options into a form suitable for Makefile use.
2066 for f in $extra_options; do
2067 extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
2068 all_opt_files="$all_opt_files $srcdir/config/$f"
2070 AC_SUBST(extra_opt_files)
2072 # auto-host.h is the file containing items generated by autoconf and is
2073 # the first file included by config.h.
2074 # If host=build, it is correct to have bconfig include auto-host.h
2075 # as well. If host!=build, we are in error and need to do more
2076 # work to find out the build config parameters.
2077 if test x$host = x$build
2079 build_auto=auto-host.h
2080 HAVE_AUTO_BUILD='# '
2082 # We create a subdir, then run autoconf in the subdir.
2083 # To prevent recursion we set host and build for the new
2084 # invocation of configure to the build for this invocation
2091 /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
2092 *) realsrcdir=../${srcdir};;
2094 # Clearing GMPINC is necessary to prevent host headers being
2095 # used by the build compiler. Defining GENERATOR_FILE stops
2096 # system.h from including gmp.h.
2097 CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
2098 CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
2099 LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
2100 GMPINC="" CPPFLAGS="${CPPFLAGS_FOR_BUILD} -DGENERATOR_FILE" \
2101 ${realsrcdir}/configure \
2102 --enable-languages=${enable_languages-all} \
2103 ${enable_obsolete+--enable-obsolete="$enable_obsolete"} \
2104 ${enable_option_checking+--enable-option-checking="$enable_option_checking"} \
2105 --target=$target_alias --host=$build_alias \
2106 --build=$build_alias || exit # retaining $tempdir
2108 # We just finished tests for the build machine, so rename
2109 # the file auto-build.h in the gcc directory.
2110 mv auto-host.h ../auto-build.h
2113 build_auto=auto-build.h
2116 AC_SUBST(build_subdir)
2117 AC_SUBST(HAVE_AUTO_BUILD)
2119 tm_file="${tm_file} defaults.h"
2120 tm_p_file="${tm_p_file} tm-preds.h"
2121 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
2122 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
2123 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
2124 # put this back in temporarily.
2125 xm_file="auto-host.h ansidecl.h ${xm_file}"
2132 # Compile in configure arguments.
2133 if test -f configargs.h ; then
2134 # Being re-configured.
2135 gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
2136 gcc_reconf_arguments=`echo "$gcc_config_arguments" | sed -e 's/^.*\( : (reconfigured) .*$\)/\1/'`
2137 if [ "$gcc_reconf_arguments" != " : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS" ]; then
2138 gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
2141 gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
2144 # Double all backslashes and backslash all quotes to turn
2145 # gcc_config_arguments into a C string.
2146 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
2147 $gcc_config_arguments
2149 gcc_config_arguments_str=`cat conftest.out`
2152 cat > configargs.h <<EOF
2153 /* Generated automatically. */
2154 static const char configuration_arguments[] = "$gcc_config_arguments_str";
2155 static const char thread_model[] = "$thread_file";
2157 static const struct {
2158 const char *name, *value;
2159 } configure_default_options[] = $configure_default_options;
2164 gcc_BASEVER=`cat $srcdir/BASE-VER`
2165 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
2166 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
2167 if test -f $srcdir/REVISION ; then
2168 gcc_REVISION=`cat $srcdir/REVISION`
2172 cat > plugin-version.h <<EOF
2173 #include "configargs.h"
2175 #define GCCPLUGIN_VERSION_MAJOR `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
2176 #define GCCPLUGIN_VERSION_MINOR `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
2177 #define GCCPLUGIN_VERSION_PATCHLEVEL `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
2178 #define GCCPLUGIN_VERSION (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
2180 static char basever[] = "$gcc_BASEVER";
2181 static char datestamp[] = "$gcc_DATESTAMP";
2182 static char devphase[] = "$gcc_DEVPHASE";
2183 static char revision[] = "$gcc_REVISION";
2185 /* FIXME plugins: We should make the version information more precise.
2186 One way to do is to add a checksum. */
2188 static struct plugin_gcc_version gcc_version = {basever, datestamp,
2190 configuration_arguments};
2194 # Determine what GCC version number to use in filesystem paths.
2197 # Internationalization
2198 ZW_GNU_GETTEXT_SISTER_DIR
2200 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
2201 # -liconv on the link line twice.
2202 case "$LIBINTL" in *$LIBICONV*)
2206 AC_ARG_ENABLE(secureplt,
2207 [AS_HELP_STRING([--enable-secureplt],
2208 [enable -msecure-plt by default for PowerPC])],
2211 AC_ARG_ENABLE(mingw-wildcard,
2212 [AS_HELP_STRING([--enable-mingw-wildcard],
2213 [Set whether to expand wildcard on command-line.
2214 Default to platform configuration])],
2215 [],[enable_mingw_wildcard=platform])
2216 AS_IF([test x"$enable_mingw_wildcard" != xplatform ],
2217 [AC_DEFINE_UNQUOTED(MINGW_DOWILDCARD,
2218 $(test x"$enable_mingw_wildcard" = xno; echo $?),
2219 [Value to set mingw's _dowildcard to.])])
2221 AC_ARG_ENABLE(large-address-aware,
2222 [AS_HELP_STRING([--enable-large-address-aware],
2223 [Link mingw executables with --large-address-aware])])
2224 AS_IF([test x"$enable_large_address_aware" = xyes],
2225 [AC_DEFINE([MINGW_DEFAULT_LARGE_ADDR_AWARE], 1,
2226 [Define if we should link mingw executables with --large-address-aware])])
2228 AC_ARG_ENABLE(leading-mingw64-underscores,
2229 AS_HELP_STRING([--enable-leading-mingw64-underscores],
2230 [enable leading underscores on 64 bit mingw targets]),
2232 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
2233 [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
2234 [Define if we should use leading underscore on 64 bit mingw targets])])
2237 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
2240 AC_ARG_ENABLE(frame-pointer,
2241 [AS_HELP_STRING([--enable-frame-pointer],
2242 [enable -fno-omit-frame-pointer by default for x86])], [],
2245 linux* | gnu* | darwin[[8912]]* | cygwin* | mingw*)
2246 # Enable -fomit-frame-pointer by default for these systems with DWARF2.
2247 enable_frame_pointer=no
2250 enable_frame_pointer=yes
2256 i[[34567]]86-*-* | x86_64-*-*)
2257 if test "x$enable_cld" = xyes; then
2258 tm_defines="${tm_defines} USE_IX86_CLD=1"
2260 if test "x$enable_frame_pointer" = xyes; then
2261 tm_defines="${tm_defines} USE_IX86_FRAME_POINTER=1"
2266 # Windows32 Registry support for specifying GCC installation paths.
2267 AC_ARG_ENABLE(win32-registry,
2268 [AS_HELP_STRING([--disable-win32-registry],
2269 [disable lookup of installation paths in the
2270 Registry on Windows hosts])
2271 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
2272 AS_HELP_STRING([--enable-win32-registry=KEY],
2273 [use KEY instead of GCC version as the last portion
2274 of the registry key])],,)
2277 win32 | pe | cygwin* | mingw32*)
2278 if test "x$enable_win32_registry" != xno; then
2279 AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
2282 if test "x$enable_win32_registry" != xno; then
2283 AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
2284 [Define to 1 if installation paths should be looked up in the Windows
2285 Registry. Ignored on non-Windows hosts.])
2287 if test "x$enable_win32_registry" != xyes \
2288 && test "x$enable_win32_registry" != x; then
2289 AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
2290 [Define to be the last component of the Windows registry key under which
2291 to look for installation paths. The full key used will be
2292 HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
2293 The default is the GCC version number.])
2299 # Get an absolute path to the GCC top-level source directory
2300 holddir=`${PWDCMD-pwd}`
2302 topdir=`${PWDCMD-pwd}`
2305 # Conditionalize the makefile for this host machine.
2307 for f in ${host_xmake_file}
2309 if test -f ${srcdir}/config/$f
2311 xmake_file="${xmake_file} \$(srcdir)/config/$f"
2315 # Conditionalize the makefile for this target machine.
2317 for f in ${tmake_file}
2319 if test -f ${srcdir}/config/$f
2321 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
2324 tmake_file="${tmake_file_}${omp_device_property_tmake_file}"
2326 out_object_file=`basename $out_file .cc`.o
2327 common_out_object_file=`basename $common_out_file .cc`.o
2329 tm_file_list="options.h"
2330 tm_include_list="options.h insn-constants.h"
2331 for f in $tm_file; do
2334 f=`echo $f | sed 's/^..//'`
2335 tm_file_list="${tm_file_list} $f"
2336 tm_include_list="${tm_include_list} $f"
2339 tm_file_list="${tm_file_list} \$(srcdir)/$f"
2340 tm_include_list="${tm_include_list} $f"
2343 tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
2344 tm_include_list="${tm_include_list} config/$f"
2351 for f in $tm_p_file; do
2354 tm_p_file_list="${tm_p_file_list} $f"
2355 tm_p_include_list="${tm_p_include_list} $f"
2358 tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
2359 tm_p_include_list="${tm_p_include_list} config/$f"
2365 for f in $tm_d_file; do
2368 tm_d_file_list="${tm_d_file_list} \$(srcdir)/config/$f"
2369 tm_d_include_list="${tm_d_include_list} config/$f"
2376 for f in $xm_file; do
2379 xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
2380 xm_include_list="${xm_include_list} $f"
2383 xm_file_list="${xm_file_list} $f"
2384 xm_include_list="${xm_include_list} $f"
2387 xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
2388 xm_include_list="${xm_include_list} config/$f"
2394 host_xm_include_list=
2395 for f in $host_xm_file; do
2398 host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
2399 host_xm_include_list="${host_xm_include_list} $f"
2402 host_xm_file_list="${host_xm_file_list} $f"
2403 host_xm_include_list="${host_xm_include_list} $f"
2406 host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
2407 host_xm_include_list="${host_xm_include_list} config/$f"
2413 for f in $build_xm_file; do
2416 build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
2417 build_xm_include_list="${build_xm_include_list} $f"
2419 auto-build.h | auto-host.h )
2420 build_xm_file_list="${build_xm_file_list} $f"
2421 build_xm_include_list="${build_xm_include_list} $f"
2424 build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
2425 build_xm_include_list="${build_xm_include_list} config/$f"
2430 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
2431 # cross-compiler which does not use the native headers and libraries.
2432 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
2433 CROSS= AC_SUBST(CROSS)
2434 ALL=all.internal AC_SUBST(ALL)
2435 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
2436 BUILD_SYSTEM_HEADER_DIR=$SYSTEM_HEADER_DIR AC_SUBST(BUILD_SYSTEM_HEADER_DIR)
2438 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x ||
2439 test x$build != x$host || test "x$with_build_sysroot" != x; then
2440 if test "x$with_build_sysroot" != x; then
2441 BUILD_SYSTEM_HEADER_DIR=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
2443 BUILD_SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2446 if test x$host != x$target
2448 CROSS="-DCROSS_DIRECTORY_STRUCTURE"
2450 SYSTEM_HEADER_DIR=$BUILD_SYSTEM_HEADER_DIR
2451 elif test "x$TARGET_SYSTEM_ROOT" != x; then
2452 SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2455 if test "x$with_build_sysroot" != "x"; then
2456 target_header_dir="${with_build_sysroot}${native_system_header_dir}"
2457 elif test "x$with_sysroot" = x; then
2458 target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
2459 elif test "x$with_sysroot" = xyes; then
2460 target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
2462 target_header_dir="${with_sysroot}${native_system_header_dir}"
2465 target_header_dir=${native_system_header_dir}
2468 # If this is a cross-compiler that does not
2469 # have its own set of headers then define
2472 # If this is using newlib, without having the headers available now,
2473 # then define inhibit_libc in LIBGCC2_CFLAGS.
2474 # This prevents libgcc2 from containing any code which requires libc
2476 : ${inhibit_libc=false}
2477 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
2478 test x$with_newlib = xyes ; } &&
2479 { test "x$with_headers" = xno || test ! -f "$target_header_dir/stdio.h"; } ; then
2482 AC_SUBST(inhibit_libc)
2484 # When building gcc with a cross-compiler, we need to adjust things so
2485 # that the generator programs are still built with the native compiler.
2486 # Also, we cannot run fixincludes.
2488 # These are the normal (build=host) settings:
2489 CC_FOR_BUILD='$(CC)' AC_SUBST(CC_FOR_BUILD)
2490 CXX_FOR_BUILD='$(CXX)' AC_SUBST(CXX_FOR_BUILD)
2491 BUILD_CFLAGS='$(ALL_CFLAGS)' AC_SUBST(BUILD_CFLAGS)
2492 BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
2493 BUILD_LDFLAGS='$(LDFLAGS)' AC_SUBST(BUILD_LDFLAGS)
2494 STMP_FIXINC=stmp-fixinc AC_SUBST(STMP_FIXINC)
2496 # And these apply if build != host, or we are generating coverage data
2497 if test x$build != x$host || test "x$coverage_flags" != x
2499 BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS-$@) $(CFLAGS_FOR_BUILD)'
2500 BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS-$@) $(CXXFLAGS_FOR_BUILD)'
2501 BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
2505 if test x$enable_fixincludes = xno;
2510 # Expand extra_headers to include complete path.
2511 # This substitutes for lots of t-* files.
2513 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
2514 for file in ${extra_headers} ; do
2515 extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
2518 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
2519 if test x"$use_gcc_tgmath" = xyes
2520 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
2523 # Define collect2 in Makefile.
2524 case $host_can_use_collect2 in
2526 *) collect2='collect2$(exeext)' ;;
2528 AC_SUBST([collect2])
2530 # Add a definition of USE_COLLECT2 if system wants one.
2531 case $use_collect2 in
2532 no) use_collect2= ;;
2535 host_xm_defines="${host_xm_defines} USE_COLLECT2"
2536 xm_defines="${xm_defines} USE_COLLECT2"
2537 case $host_can_use_collect2 in
2539 AC_MSG_ERROR([collect2 is required but cannot be built on this system])
2545 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
2546 [Define to the name of the LTO plugin DSO that must be
2547 passed to the linker's -plugin=LIB option.])
2549 # ---------------------------
2550 # Assembler & linker features
2551 # ---------------------------
2553 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
2554 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
2555 # However when ld-new is first executed from the build tree, libtool will
2556 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
2557 # to the build tree. While doing this we need to use the previous-stage
2558 # linker, or we have an infinite loop. The presence of a shell script as
2559 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
2560 # the gcc/collect-ld script. So we need to know how libtool works, or
2561 # exec-tool will fail.
2563 m4_defun([_LT_CONFIG_COMMANDS], [])
2566 AC_SUBST(enable_fast_install)
2568 # Identify the assembler which will work hand-in-glove with the newly
2569 # built GCC, so that we can examine its features. This is the assembler
2570 # which will be driven by the driver program.
2572 # If build != host, and we aren't building gas in-tree, we identify a
2573 # build->target assembler and hope that it will have the same features
2574 # as the host->target assembler we'll be using.
2575 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
2577 m4_pattern_allow([AS_FOR_TARGET])dnl
2578 AS_VAR_SET_IF(gcc_cv_as,, [
2579 if test -x "$DEFAULT_ASSEMBLER"; then
2580 gcc_cv_as="$DEFAULT_ASSEMBLER"
2581 elif test -f $gcc_cv_as_gas_srcdir/configure.ac \
2582 && test -f ../gas/Makefile \
2583 && test x$build = x$host; then
2584 gcc_cv_as=../gas/as-new$build_exeext
2585 elif test -x as$build_exeext; then
2586 # Build using assembler in the current directory.
2587 gcc_cv_as=./as$build_exeext
2588 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
2589 gcc_cv_as="$AS_FOR_TARGET"
2591 AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
2594 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
2595 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
2596 case "$ORIGINAL_AS_FOR_TARGET" in
2597 ./as | ./as$build_exeext) ;;
2598 *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
2603 [[ --enable-ld[=ARG] build ld [ARG={default,yes,no}]]],
2604 [case "${enableval}" in
2610 install_gold_as_default=no
2612 [[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
2613 [case "${enableval}" in
2615 install_gold_as_default=yes
2618 if test x${default_ld} != x; then
2619 install_gold_as_default=yes
2625 AC_MSG_ERROR([invalid --enable-gold argument])
2629 # Identify the linker which will work hand-in-glove with the newly
2630 # built GCC, so that we can examine its features. This is the linker
2631 # which will be driven by the driver program.
2633 # If build != host, and we aren't building gas in-tree, we identify a
2634 # build->target linker and hope that it will have the same features
2635 # as the host->target linker we'll be using.
2636 gcc_cv_gld_major_version=
2637 gcc_cv_gld_minor_version=
2638 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
2639 gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
2640 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
2642 AS_VAR_SET_IF(gcc_cv_ld,, [
2643 if test -x "$DEFAULT_LINKER"; then
2644 gcc_cv_ld="$DEFAULT_LINKER"
2645 elif test $install_gold_as_default = yes \
2646 && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
2647 && test -f ../gold/Makefile \
2648 && test x$build = x$host; then
2649 gcc_cv_ld=../gold/ld-new$build_exeext
2650 elif test -f $gcc_cv_ld_gld_srcdir/configure.ac \
2651 && test -f ../ld/Makefile \
2652 && test x$build = x$host; then
2653 gcc_cv_ld=../ld/ld-new$build_exeext
2654 elif test -x collect-ld$build_exeext; then
2655 # Build using linker in the current directory.
2656 gcc_cv_ld=./collect-ld$build_exeext
2657 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2658 gcc_cv_ld="$LD_FOR_TARGET"
2660 AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2663 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2664 PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
2665 # if the PLUGIN_LD is set ld-new, just have it as ld
2666 # as that is the installed named.
2667 if test x$PLUGIN_LD_SUFFIX = xld-new \
2668 || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
2671 AC_ARG_WITH(plugin-ld,
2672 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2673 [if test x"$withval" != x; then
2674 ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2675 PLUGIN_LD_SUFFIX="$withval"
2677 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2678 AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
2680 # Check to see if we are using gold instead of ld
2681 AC_MSG_CHECKING(whether we are using gold)
2683 if test x$gcc_cv_ld != x; then
2684 if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2685 | grep "GNU gold" > /dev/null; then
2689 AC_MSG_RESULT($ld_is_gold)
2691 # Check to see if we are using mold instead of ld
2692 AC_MSG_CHECKING(whether we are using mold)
2694 if test x$gcc_cv_ld != x; then
2695 if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2696 | grep "mold" > /dev/null; then
2700 AC_MSG_RESULT($ld_is_mold)
2703 AC_MSG_CHECKING(gold linker with split stack support as non default)
2704 # Check to see if default ld is not gold, but gold is
2705 # available and has support for split stack. If gcc was configured
2706 # with gold then no checking is done.
2708 if test x$ld_is_gold = xno && which ${gcc_cv_ld}.gold >/dev/null 2>&1; then
2710 # For platforms other than powerpc64*, enable as appropriate.
2713 ld_gold=`which ${gcc_cv_ld}.gold`
2714 # Make sure this gold has minimal split stack support
2715 if $ld_gold --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
2716 ld_vers=`$ld_gold --version | sed 1q`
2717 gold_vers=`echo $ld_vers | sed -n \
2718 -e 's,^[[^)]]*[[ ]]\([[0-9]][[0-9]]*\.[[0-9]][[0-9]]*[[^)]]*\)) .*$,\1,p'`
2720 # check that the gold version contains the complete split stack support
2721 # on powerpc64 big and little endian
2723 case "$gold_vers" in
2724 2.25.[[1-9]]*|2.2[[6-9]][[.0-9]]*|2.[[3-9]][[.0-9]]*|[[3-9]].[[.0-9]]*) gold_non_default=yes
2726 *) gold_non_default=no
2732 if test $gold_non_default = yes; then
2733 AC_DEFINE(HAVE_GOLD_NON_DEFAULT_SPLIT_STACK, 1,
2734 [Define if the gold linker supports split stack and is available as a non-default])
2737 AC_MSG_RESULT($gold_non_default)
2739 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2740 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2741 case "$ORIGINAL_LD_FOR_TARGET" in
2742 ./collect-ld | ./collect-ld$build_exeext) ;;
2743 *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2746 AC_MSG_CHECKING(what linker to use)
2747 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2748 || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2749 # Single tree build which includes ld. We want to prefer it
2750 # over whatever linker top-level may have detected, since
2751 # we'll use what we're building after installation anyway.
2752 AC_MSG_RESULT(newly built ld)
2754 in_tree_ld_is_elf=no
2755 if (grep 'EMUL = .*elf' ../ld/Makefile \
2756 || grep 'EMUL = .*linux' ../ld/Makefile \
2757 || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2758 in_tree_ld_is_elf=yes
2759 elif test "$ld_is_gold" = yes; then
2760 in_tree_ld_is_elf=yes
2762 for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.ac $gcc_cv_ld_gld_srcdir/Makefile.in
2765 gcc_cv_gld_version=`sed -n -e 's/^[ ]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
2766 if test x$gcc_cv_gld_version != x; then
2770 case $gcc_cv_gld_version in
2773 *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
2776 gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2777 gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2779 ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
2780 ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
2782 AC_MSG_RESULT($gcc_cv_ld)
2784 gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
2785 ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
2786 ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
2789 AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
2790 AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)
2792 # Figure out what nm we will be using.
2793 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2794 AS_VAR_SET_IF(gcc_cv_nm,, [
2795 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2796 && test -f ../binutils/Makefile \
2797 && test x$build = x$host; then
2798 gcc_cv_nm=../binutils/nm-new$build_exeext
2799 elif test -x nm$build_exeext; then
2800 gcc_cv_nm=./nm$build_exeext
2801 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2802 gcc_cv_nm="$NM_FOR_TARGET"
2804 AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2807 AC_MSG_CHECKING(what nm to use)
2808 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2809 # Single tree build which includes binutils.
2810 AC_MSG_RESULT(newly built nm)
2813 AC_MSG_RESULT($gcc_cv_nm)
2817 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2818 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2819 case "$ORIGINAL_NM_FOR_TARGET" in
2820 ./nm | ./nm$build_exeext) ;;
2821 *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2825 # Figure out what objdump we will be using.
2826 AS_VAR_SET_IF(gcc_cv_objdump,, [
2827 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2828 && test -f ../binutils/Makefile \
2829 && test x$build = x$host; then
2830 # Single tree build which includes binutils.
2831 gcc_cv_objdump=../binutils/objdump$build_exeext
2832 elif test -x objdump$build_exeext; then
2833 gcc_cv_objdump=./objdump$build_exeext
2834 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2835 gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2837 AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2840 AC_MSG_CHECKING(what objdump to use)
2841 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2842 # Single tree build which includes binutils.
2843 AC_MSG_RESULT(newly built objdump)
2844 elif test x$gcc_cv_objdump = x; then
2845 AC_MSG_RESULT(not found)
2847 AC_MSG_RESULT($gcc_cv_objdump)
2850 # Figure out what readelf we will be using.
2851 AS_VAR_SET_IF(gcc_cv_readelf,, [
2852 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2853 && test -f ../binutils/Makefile \
2854 && test x$build = x$host; then
2855 # Single tree build which includes binutils.
2856 gcc_cv_readelf=../binutils/readelf$build_exeext
2857 elif test -x readelf$build_exeext; then
2858 gcc_cv_readelf=./readelf$build_exeext
2859 elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
2860 gcc_cv_readelf="$READELF_FOR_TARGET"
2862 AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
2865 AC_MSG_CHECKING(what readelf to use)
2866 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2867 # Single tree build which includes binutils.
2868 AC_MSG_RESULT(newly built readelf)
2869 elif test x$gcc_cv_readelf = x; then
2870 AC_MSG_RESULT(not found)
2872 AC_MSG_RESULT($gcc_cv_readelf)
2875 # Figure out what otool we will be using.
2876 AS_VAR_SET_IF(gcc_cv_otool,, [
2877 if test -x otool$build_exeext; then
2878 gcc_cv_otool=./otool$build_exeext
2879 elif ( set dummy $OTOOL_FOR_TARGET; test -x $[2] ); then
2880 gcc_cv_otool="$OTOOL_FOR_TARGET"
2882 AC_PATH_PROG(gcc_cv_otool, $OTOOL_FOR_TARGET)
2885 AC_MSG_CHECKING(what otool to use)
2886 if test x$gcc_cv_otool = x; then
2887 AC_MSG_RESULT(not found)
2889 AC_MSG_RESULT($gcc_cv_otool)
2892 # Figure out the dsymutil we will use.
2893 AS_VAR_SET_IF(gcc_cv_dsymutil,, [
2894 if test -x "$DEFAULT_DSYMUTIL"; then
2895 gcc_cv_dsymutil="$DEFAULT_DSYMUTIL"
2896 elif test -x dsymutil$build_exeext; then
2897 gcc_cv_dsymutil=./dsymutil$build_exeext
2898 elif ( set dummy $DSYMUTIL_FOR_TARGET; test -x $[2] ); then
2899 gcc_cv_dsymutil=$DSYMUTIL_FOR_TARGET
2900 elif ( set dummy $DSYMUTIL; test -x $[2] ); then
2901 gcc_cv_dsymutil=$DSYMUTIL
2903 AC_PATH_PROG(gcc_cv_dsymutil, $DSYMUTIL_FOR_TARGET)
2906 ORIGINAL_DSYMUTIL_FOR_TARGET=$gcc_cv_dsymutil
2907 AC_SUBST(ORIGINAL_DSYMUTIL_FOR_TARGET)
2908 case "$ORIGINAL_DSYMUTIL_FOR_TARGET" in
2909 ./dsymutil | ./dsymutil$build_exeext) ;;
2910 *) AC_CONFIG_FILES(dsymutil:exec-tool.in, [chmod +x dsymutil]) ;;
2913 # Figure out what assembler alignment features are present.
2914 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,,
2917 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2918 [Define if your assembler supports .balign and .p2align.])])
2920 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,,
2922 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2923 [Define if your assembler supports specifying the maximum number
2924 of bytes to skip when using the GAS .p2align command.])])
2926 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,,
2928 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2929 [Define if your assembler supports .literal16.])])
2931 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,,
2932 [conftest_label1: .word 0
2934 conftest_label2: .word 0
2936 [if test x$gcc_cv_nm != x; then
2937 $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2938 $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2939 if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2941 else gcc_cv_as_subsection_m1=yes
2943 rm -f conftest.nm1 conftest.nm2
2945 [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2946 [Define if your assembler supports .subsection and .subsection -1 starts
2947 emitting at the beginning of your section.])])
2949 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,,
2951 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2953 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,,
2954 [ .weakref foobar, barfnot],,
2955 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2957 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,,
2959 .NSUBSPA $CODE$,COMDAT],,
2960 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2962 # .hidden needs to be supported in both the assembler and the linker,
2963 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2964 # This is irritatingly difficult to feature test for; we have to check the
2965 # date string after the version number. If we've got an in-tree
2966 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2968 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2971 conftest_s=' .globl foobar,hidden'
2974 conftest_s=' .hidden foobar
2978 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,, [$conftest_s])
2981 # Darwin as has some visibility support, though with a different syntax.
2982 gcc_cv_as_hidden=yes
2986 # gnu_indirect_function type is an extension proposed at
2987 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2988 # selection of function implementation
2989 AC_ARG_ENABLE(gnu-indirect-function,
2990 [AS_HELP_STRING([--enable-gnu-indirect-function],
2991 [enable the use of the @gnu_indirect_function to glibc systems])],
2992 [case $enable_gnu_indirect_function in
2994 *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2995 Valid choices are 'yes' and 'no'.]) ;;
2997 [enable_gnu_indirect_function="$default_gnu_indirect_function"])
3001 AC_MSG_CHECKING(linker ifunc IRELATIVE support)
3002 cat > conftest.s <<EOF
3004 .type foo_resolver, @function
3007 .size foo_resolver, .-foo_resolver
3010 .type foo, %gnu_indirect_function
3011 .set foo, foo_resolver
3014 .type bar, @function
3020 if test x$gcc_cv_as != x \
3021 && test x$gcc_cv_ld != x \
3022 && test x$gcc_cv_readelf != x \
3023 && $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
3024 && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1 \
3025 && $gcc_cv_readelf --relocs --wide conftest \
3026 | grep R_RISCV_IRELATIVE > /dev/null 2>&1; then
3027 enable_gnu_indirect_function=yes
3029 rm -f conftest conftest.o conftest.s
3030 AC_MSG_RESULT($enable_gnu_indirect_function)
3034 gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
3035 AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
3036 [Define if your system supports gnu indirect functions.])
3040 if test $in_tree_ld != yes ; then
3041 ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
3042 if echo "$ld_ver" | grep GNU > /dev/null; then
3043 if test x"$ld_is_gold" = xyes; then
3044 # GNU gold --version looks like this:
3046 # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
3048 # We extract the binutils version which is more familiar and specific
3049 # than the gold version.
3050 ld_vers=`echo $ld_ver | sed -n \
3051 -e 's,^[^)]*[ ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3053 # GNU ld --version looks like this:
3055 # GNU ld (GNU Binutils) 2.21.51.20110225
3056 ld_vers=`echo $ld_ver | sed -n \
3057 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3059 ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)\(-*\)\([01][0-9]\)\2\([0-3][0-9]\).*$,\1\3\4,p'`
3060 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3061 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3062 ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
3066 # Solaris 2 ld -V output looks like this for a regular version:
3068 # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
3070 # but test versions add stuff at the end:
3072 # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
3074 # ld and ld.so.1 are guaranteed to be updated in lockstep, so ld version
3075 # numbers can be used in ld.so.1 feature checks even if a different
3076 # linker is configured.
3077 ld_ver=`$gcc_cv_ld -V 2>&1`
3078 if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
3079 ld_vers=`echo $ld_ver | sed -n \
3080 -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
3081 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3082 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3090 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
3091 [[if test $in_tree_ld = yes ; then
3093 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
3094 && test $in_tree_ld_is_elf = yes; then
3095 gcc_cv_ld_hidden=yes
3098 gcc_cv_ld_hidden=yes
3099 if test x"$ld_is_gold" = xyes; then
3101 elif test x"$ld_is_mold" = xyes; then
3103 elif echo "$ld_ver" | grep GNU > /dev/null; then
3104 if test 0"$ld_date" -lt 20020404; then
3105 if test -n "$ld_date"; then
3106 # If there was date string, but was earlier than 2002-04-04, fail
3108 elif test -z "$ld_vers"; then
3109 # If there was no date string nor ld version number, something is wrong
3112 test -z "$ld_vers_patch" && ld_vers_patch=0
3113 if test "$ld_vers_major" -lt 2; then
3115 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
3116 gcc_cv_ld_hidden="no"
3117 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
3125 gcc_cv_ld_hidden=yes
3128 # Darwin ld has some visibility support.
3129 gcc_cv_ld_hidden=yes
3131 hppa64*-*-hpux* | ia64*-*-hpux*)
3132 gcc_cv_ld_hidden=yes
3135 # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
3136 # .symbolic was only added in Solaris 9 12/02.
3137 gcc_cv_ld_hidden=yes
3145 libgcc_visibility=no
3146 AC_SUBST(libgcc_visibility)
3147 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
3148 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
3149 libgcc_visibility=yes
3150 AC_DEFINE(HAVE_GAS_HIDDEN, 1,
3151 [Define if your assembler and linker support .hidden.])
3154 AC_MSG_CHECKING(linker read-only and read-write section mixing)
3155 gcc_cv_ld_ro_rw_mix=unknown
3156 if test $in_tree_ld = yes ; then
3157 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
3158 && test $in_tree_ld_is_elf = yes; then
3159 gcc_cv_ld_ro_rw_mix=read-write
3161 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3162 echo '.section myfoosect, "a"' > conftest1.s
3163 echo '.section myfoosect, "aw"' > conftest2.s
3164 echo '.byte 1' >> conftest2.s
3165 echo '.section myfoosect, "a"' > conftest3.s
3166 echo '.byte 0' >> conftest3.s
3167 if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
3168 && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
3169 && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
3170 && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
3171 conftest2.o conftest3.o > /dev/null 2>&1; then
3172 gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
3173 | sed -e '/myfoosect/!d' -e N`
3174 if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
3175 if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
3176 gcc_cv_ld_ro_rw_mix=read-only
3178 gcc_cv_ld_ro_rw_mix=read-write
3183 rm -f conftest.* conftest[123].*
3186 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
3187 AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
3188 [Define if your linker links a mix of read-only
3189 and read-write sections into a read-write section.])
3191 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
3193 gcc_AC_INITFINI_ARRAY
3195 # Check if we have .[us]leb128, and support symbol arithmetic with it.
3196 # Older versions of GAS and some non-GNU assemblers, have a bugs handling
3197 # these directives, even when they appear to accept them.
3198 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,,
3205 .uleb128 0x8000000000000000
3208 if test "x$gcc_cv_objdump" != x; then
3209 if $gcc_cv_objdump -s conftest.o 2>/dev/null \
3210 | grep '04800a8e 78808080 80808080 808001' >/dev/null; then
3211 gcc_cv_as_leb128=yes
3213 elif test "x$gcc_cv_otool" != x; then
3214 if $gcc_cv_otool -d conftest.o 2>/dev/null \
3215 | grep '04 80 0a 8e 78 80 80 80 80 80 80 80 80 80 01' >/dev/null; then
3216 gcc_cv_as_leb128=yes
3219 # play safe, assume the assembler is broken.
3223 [AC_DEFINE(HAVE_AS_LEB128, 1,
3224 [Define if your assembler supports .sleb128 and .uleb128.])],
3225 [AC_DEFINE(HAVE_AS_LEB128, 0,
3226 [Define if your assembler supports .sleb128 and .uleb128.])])
3228 # Determine if an .eh_frame section is read-only.
3229 gcc_fn_eh_frame_ro () {
3230 $gcc_cv_as $1 -o conftest.o conftest.s > /dev/null 2>&1 && \
3231 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
3232 sed -e '/.eh_frame/!d' -e N | grep READONLY > /dev/null
3235 # Check if we have assembler support for unwind directives.
3236 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,,
3242 .cfi_escape 1, 2, 3, 4, 5
3246 # If the linker used on Solaris (like Sun ld) isn't capable of merging
3247 # read-only and read-write sections, we need to make sure that the
3248 # assembler used emits read-write .eh_frame sections.
3249 if test "x$gcc_cv_ld_ro_rw_mix" = xread-write; then
3250 gcc_cv_as_cfi_directive=yes
3251 elif test "x$gcc_cv_objdump" = x; then
3252 # No objdump, err on the side of caution.
3253 gcc_cv_as_cfi_directive=no
3255 if test x$gas = xyes; then
3263 sparc*-*-solaris2.*)
3264 # On Solaris/SPARC, .eh_frame sections should always be read-write.
3265 if gcc_fn_eh_frame_ro $as_32_opt \
3266 || gcc_fn_eh_frame_ro $as_64_opt; then
3267 gcc_cv_as_cfi_directive=no
3269 gcc_cv_as_cfi_directive=yes
3272 i?86-*-solaris2.* | x86_64-*-solaris2.*)
3273 # On Solaris/x86, make sure that GCC and assembler agree on using
3274 # read-only .eh_frame sections for 64-bit.
3275 if gcc_fn_eh_frame_ro $as_32_opt; then
3276 gcc_cv_as_cfi_directive=no
3277 elif gcc_fn_eh_frame_ro $as_64_opt; then
3278 gcc_cv_as_cfi_directive=yes
3280 gcc_cv_as_cfi_directive=no
3287 gcc_cv_as_cfi_directive=yes
3290 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
3291 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,,
3294 .cfi_adjust_cfa_offset 64
3296 .cfi_adjust_cfa_offset 128
3299 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
3300 | grep 'DW_CFA_advance_loc[24]:[ ][ ]*75040[ ]' >/dev/null; then
3301 gcc_cv_as_cfi_advance_working=yes
3305 # no objdump, err on the side of caution
3306 gcc_cv_as_cfi_advance_working=no
3308 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
3309 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
3310 [`if test $gcc_cv_as_cfi_directive = yes \
3311 && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
3312 [Define 0/1 if your assembler supports CFI directives.])
3314 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
3315 gcc_GAS_CHECK_FEATURE([cfi personality directive],
3316 gcc_cv_as_cfi_personality_directive,,
3319 .cfi_personality 0, symbol
3321 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
3322 [`if test $gcc_cv_as_cfi_personality_directive = yes; then echo 1; else echo 0; fi`],
3323 [Define 0/1 if your assembler supports .cfi_personality.])
3325 gcc_GAS_CHECK_FEATURE([cfi sections directive],
3326 gcc_cv_as_cfi_sections_directive,,
3328 .cfi_sections .debug_frame, .eh_frame
3332 win32 | pe | cygwin* | mingw32*)
3333 # Need to check that we generated the correct relocation for the
3334 # .debug_frame section. This was fixed for binutils 2.21.
3335 gcc_cv_as_cfi_sections_directive=no
3336 if test "x$gcc_cv_objdump" != x; then
3337 if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
3338 grep -i secrel > /dev/null; then
3339 gcc_cv_as_cfi_sections_directive=yes
3344 gcc_cv_as_cfi_sections_directive=yes
3347 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
3348 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
3349 [`if test $gcc_cv_as_cfi_sections_directive = yes; then echo 1; else echo 0; fi`],
3350 [Define 0/1 if your assembler supports .cfi_sections.])
3352 # GAS versions up to and including 2.11.0 may mis-optimize
3354 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,,
3361 .section .eh_frame,"aw",@progbits
3363 .4byte .LECIE1-.LSCIE1
3377 .4byte .LEFDE1-.LASFDE1
3379 .4byte .LASFDE1-__FRAME_BEGIN__
3387 [ dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
3388 cat > conftest.lit <<EOF
3389 0000 10000000 00000000 017a0001 781a0004 .........z..x...
3390 0010 01000000 12000000 18000000 00000000 ................
3391 0020 08000000 04080000 0044 .........D @&t@
3393 cat > conftest.big <<EOF
3394 0000 00000010 00000000 017a0001 781a0004 .........z..x...
3395 0010 00000001 00000012 00000018 00000000 ................
3396 0020 00000008 04000000 0844 .........D @&t@
3398 # If the assembler didn't choke, and we can objdump,
3399 # and we got the correct data, then succeed.
3400 # The text in the here-document typically retains its unix-style line
3401 # endings, while the output of objdump will use host line endings.
3402 # Therefore, use diff -b for the comparisons.
3403 if test x$gcc_cv_objdump != x \
3404 && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
3405 | tail -3 > conftest.got \
3406 && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
3407 || diff -b conftest.big conftest.got > /dev/null 2>&1; }
3409 gcc_cv_as_eh_frame=yes
3410 elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
3411 gcc_cv_as_eh_frame=buggy
3413 # Uh oh, what do we do now?
3414 gcc_cv_as_eh_frame=no
3417 if test $gcc_cv_as_eh_frame = buggy; then
3418 AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
3419 [Define if your assembler mis-optimizes .eh_frame data.])
3422 # Test if the assembler supports the section flag 'e' or #exclude for
3423 # specifying an excluded section.
3424 gcc_GAS_CHECK_FEATURE([section exclude flag], gcc_cv_as_section_exclude_e,
3428 if test $gcc_cv_as_section_exclude_e = no; then
3430 # Solaris as uses #exclude instead.
3434 conftest_s='.section "foo1", #exclude'
3436 i?86-*-solaris2* | x86_64-*-solaris2*)
3437 conftest_s='.section foo1, #exclude'
3442 gcc_GAS_CHECK_FEATURE([section exclude flag], gcc_cv_as_section_exclude_hash,,
3446 AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
3447 [`if test $gcc_cv_as_section_exclude_e = yes || test $gcc_cv_as_section_exclude_hash = yes; then echo 1; else echo 0; fi`],
3448 [Define if your assembler supports specifying the exclude section flag.])
3450 # Test if the assembler supports the section flag 'R' for specifying
3451 # section with SHF_GNU_RETAIN.
3453 # Solaris may use GNU assembler with Solairs ld. Even if GNU
3454 # assembler supports the section flag 'R', it doesn't mean that
3455 # Solairs ld supports it.
3457 gcc_cv_as_shf_gnu_retain=no
3460 gcc_GAS_CHECK_FEATURE([section 'R' flag], gcc_cv_as_shf_gnu_retain,
3462 [.section .foo,"awR",%progbits
3466 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_GNU_RETAIN,
3467 [`if test $gcc_cv_as_shf_gnu_retain = yes; then echo 1; else echo 0; fi`],
3468 [Define 0/1 if your assembler supports marking sections with SHF_GNU_RETAIN flag.])
3470 # Test if the assembler supports the section flag 'o' for specifying
3471 # section with link-order.
3473 # Solaris may use GNU assembler with Solairs ld. Even if GNU
3474 # assembler supports the section flag 'o', it doesn't mean that
3475 # Solairs ld supports it.
3477 gcc_cv_as_section_link_order=no
3480 gcc_GAS_CHECK_FEATURE([section 'o' flag], gcc_cv_as_section_link_order,
3484 .section __patchable_function_entries,"awo",%progbits,.foo
3488 AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_LINK_ORDER,
3489 [`if test $gcc_cv_as_section_link_order = yes; then echo 1; else echo 0; fi`],
3490 [Define 0/1 if your assembler supports 'o' flag in .section directive.])
3492 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
3494 [.section .rodata.str, "aMS", @progbits, 1])
3495 if test $gcc_cv_as_shf_merge = no; then
3496 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
3498 [.section .rodata.str, "aMS", %progbits, 1])
3500 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
3501 [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
3502 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
3504 gcc_cv_ld_aligned_shf_merge=yes
3506 # SHF_MERGE support is broken in Solaris ld up to Solaris 11.3/SPARC for
3508 sparc*-*-solaris2.11*)
3509 if test x"$gnu_ld" = xno \
3510 && test "$ld_vers_major" -lt 2 && test "$ld_vers_minor" -lt 3159; then
3511 gcc_cv_ld_aligned_shf_merge=no
3515 AC_DEFINE_UNQUOTED(HAVE_LD_ALIGNED_SHF_MERGE,
3516 [`if test $gcc_cv_ld_aligned_shf_merge = yes; then echo 1; else echo 0; fi`],
3517 [Define 0/1 if your linker supports the SHF_MERGE flag with section alignment > 1.])
3519 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
3520 gcc_cv_as_comdat_group,
3522 [.section .text,"axG",@progbits,.foo,comdat])
3523 if test $gcc_cv_as_comdat_group = yes; then
3524 gcc_cv_as_comdat_group_percent=no
3525 gcc_cv_as_comdat_group_group=no
3527 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
3528 gcc_cv_as_comdat_group_percent,
3530 [.section .text,"axG",%progbits,.foo,comdat])
3531 if test $gcc_cv_as_comdat_group_percent = yes; then
3532 gcc_cv_as_comdat_group_group=no
3535 # Sun as uses a completely different syntax.
3540 .group foo,".text%foo",#comdat
3541 .section ".text%foo", #alloc,#execinstr,#progbits
3546 i?86-*-solaris2* | x86_64-*-solaris2*)
3548 .group foo,.text%foo,#comdat
3549 .section .text%foo, "ax", @progbits
3555 gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
3556 gcc_cv_as_comdat_group_group,
3560 if test -z "${gcc_cv_as_comdat_group_group+set}"; then
3561 gcc_cv_as_comdat_group_group=no
3565 if test x"$ld_is_gold" = xyes; then
3567 elif test x"$ld_is_mold" = xyes; then
3569 elif test $in_tree_ld = yes ; then
3571 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3572 && test $in_tree_ld_is_elf = yes; then
3575 elif echo "$ld_ver" | grep GNU > /dev/null; then
3577 if test 0"$ld_date" -lt 20050308; then
3578 if test -n "$ld_date"; then
3579 # If there was date string, but was earlier than 2005-03-08, fail
3581 elif test "$ld_vers_major" -lt 2; then
3583 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
3590 *-*-solaris2.1[1-9]*)
3592 # Sun ld has COMDAT group support since Solaris 9, but it doesn't
3593 # interoperate with GNU as until Solaris 11 build 130, i.e. ld
3596 # If using Sun as for COMDAT group as emitted by GCC, one needs at
3597 # least ld version 1.2267.
3598 if test "$ld_vers_major" -gt 1; then
3600 elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
3602 elif test "$ld_vers_minor" -ge 2267; then
3607 # Assume linkers other than GNU ld don't support COMDAT group.
3613 # Allow overriding the automatic COMDAT group tests above.
3614 AC_ARG_ENABLE(comdat,
3615 [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
3616 [comdat_group="$enable_comdat"])
3617 if test $comdat_group = no; then
3618 gcc_cv_as_comdat_group=no
3619 gcc_cv_as_comdat_group_percent=no
3620 gcc_cv_as_comdat_group_group=no
3622 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
3623 [`if test $gcc_cv_as_comdat_group = yes \
3624 || test $gcc_cv_as_comdat_group_percent = yes \
3625 || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
3626 [Define 0/1 if your assembler and linker support COMDAT groups.])
3628 # Restrict this test to Solaris/x86: other targets define this statically.
3630 i?86-*-solaris2* | x86_64-*-solaris2*)
3631 AC_MSG_CHECKING(support for hidden thunks in linkonce sections)
3632 if test $in_tree_ld = yes || echo "$ld_ver" | grep GNU > /dev/null; then
3636 # Full support for hidden thunks in linkonce sections only appeared in
3637 # Solaris 11/OpenSolaris.
3638 *-*-solaris2.1[[1-9]]*)
3646 AC_MSG_RESULT($hidden_linkonce)
3647 AC_DEFINE_UNQUOTED(USE_HIDDEN_LINKONCE,
3648 [`if test $hidden_linkonce = yes; then echo 1; else echo 0; fi`],
3649 [Define 0/1 if your linker supports hidden thunks in linkonce sections.])
3653 gcc_GAS_CHECK_FEATURE([line table is_stmt support],
3657 .loc 1 1 0 is_stmt 1],,
3658 [AC_DEFINE(HAVE_GAS_LOC_STMT, 1,
3659 [Define if your assembler supports the .loc is_stmt sub-directive.])])
3661 gcc_GAS_CHECK_FEATURE([line table discriminator support],
3662 gcc_cv_as_discriminator,,
3665 .loc 1 1 0 discriminator 1],,
3666 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
3667 [Define if your assembler supports the .loc discriminator sub-directive.])])
3669 # Catch the newlib flag of the same name so we can gate GCC features on it.
3670 AC_ARG_ENABLE(newlib-nano-formatted-io,
3671 [AS_HELP_STRING([--enable-newlib-nano-formatted-io], [Use nano version
3673 [case "${enableval}" in
3677 AC_MSG_ERROR([unknown newlib-nano-formatted-io setting $enableval])
3681 # Thread-local storage - the check is heavily parameterized.
3688 .section ".tdata","awT",@progbits
3691 ldq $27,__tls_get_addr($29) !literal!1
3692 lda $16,foo($29) !tlsgd!1
3693 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3694 ldq $27,__tls_get_addr($29) !literal!2
3695 lda $16,foo($29) !tlsldm!2
3696 jsr $26,($27),__tls_get_addr !lituse_tlsldm!2
3697 ldq $1,foo($29) !gotdtprel
3698 ldah $2,foo($29) !dtprelhi
3699 lda $3,foo($2) !dtprello
3700 lda $4,foo($29) !dtprel
3701 ldq $1,foo($29) !gottprel
3702 ldah $2,foo($29) !tprelhi
3703 lda $3,foo($2) !tprello
3704 lda $4,foo($29) !tprel'
3705 tls_as_opt=--fatal-warnings
3709 add_s r0,r0, @foo@tpoff'
3711 cris-*-*|crisv32-*-*)
3713 .section ".tdata","awT",@progbits
3718 tls_as_opt=--fatal-warnings
3722 .section ".tdata","awT",@progbits
3732 .section ".tdata","awT",@progbits
3736 addil LT%foo-$tls_gdidx$,gp
3737 ldo RT%foo-$tls_gdidx$(%r1),%arg0
3740 addil LT%foo-$tls_ldidx$,gp
3742 ldo RT%foo-$tls_ldidx$(%r1),%arg0
3743 addil LR%foo-$tls_dtpoff$,%ret0
3744 ldo RR%foo-$tls_dtpoff$(%r1),%t1
3746 addil LT%foo-$tls_ieoff$,gp
3747 ldw RT%foo-$tls_ieoff$(%r1),%t2
3750 addil LR%foo-$tls_leoff$,%t1
3751 ldo RR%foo-$tls_leoff$(%r1),%t2'
3752 tls_as_opt=--fatal-warnings
3756 .section ".tdata","awT",%progbits
3765 i[34567]86-*-* | x86_64-*-*)
3767 i[34567]86-*-solaris2.* | x86_64-*-solaris2.*)
3774 if test x$on_solaris = xyes && test x$gas_flag = xno; then
3776 .section .tdata,"awt",@progbits'
3779 AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
3780 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
3784 .section ".tdata","awT",@progbits'
3786 tls_as_opt="--fatal-warnings"
3790 if test x$on_solaris = xyes; then
3792 yes) tls_as_opt="$tls_as_opt --32" ;;
3795 conftest_s="$conftest_s
3799 leal foo@tlsgd(,%ebx,1), %eax
3800 leal foo@tlsldm(%ebx), %eax
3801 leal foo@dtpoff(%eax), %edx
3802 movl foo@gottpoff(%ebx), %eax
3803 subl foo@gottpoff(%ebx), %eax
3804 addl foo@gotntpoff(%ebx), %eax
3805 movl foo@indntpoff, %eax
3806 movl \$foo@tpoff, %eax
3807 subl \$foo@tpoff, %eax
3808 leal foo@ntpoff(%ecx), %eax"
3811 if test x$on_solaris = xyes; then
3813 yes) tls_as_opt="$tls_as_opt --64" ;;
3814 no) tls_as_opt="$tls_as_opt -xarch=amd64" ;;
3817 conftest_s="$conftest_s
3821 leaq foo@tlsgd(%rip), %rdi
3822 leaq foo@tlsld(%rip), %rdi
3823 leaq foo@dtpoff(%rax), %rdx
3824 movq foo@gottpoff(%rip), %rax
3825 movq \$foo@tpoff, %rax"
3831 .section ".tdata","awT",@progbits
3834 addl r16 = @ltoff(@dtpmod(foo#)), gp
3835 addl r17 = @ltoff(@dtprel(foo#)), gp
3836 addl r18 = @ltoff(@tprel(foo#)), gp
3837 addl r19 = @dtprel(foo#), gp
3838 adds r21 = @dtprel(foo#), r13
3839 movl r23 = @dtprel(foo#)
3840 addl r20 = @tprel(foo#), gp
3841 adds r22 = @tprel(foo#), r13
3842 movl r24 = @tprel(foo#)'
3843 tls_as_opt=--fatal-warnings
3847 .section .tdata,"awT",@progbits
3854 tls_as_opt='--fatal-warnings'
3858 .section .tdata,"awT",@progbits
3862 addik r5,r20,x@TLSGD
3863 addik r5,r20,x@TLSLDM'
3864 tls_as_opt='--fatal-warnings'
3868 .section .tdata,"awT",@progbits
3872 addiu $4, $28, %tlsgd(x)
3873 addiu $4, $28, %tlsldm(x)
3874 lui $4, %dtprel_hi(x)
3875 addiu $4, $4, %dtprel_lo(x)
3876 lw $4, %gottprel(x)($28)
3877 lui $4, %tprel_hi(x)
3878 addiu $4, $4, %tprel_lo(x)'
3879 tls_as_opt='-32 --fatal-warnings'
3883 .section .tdata,"awT",@progbits
3888 move.l x@TLSGD(%a5),%a0
3889 move.l x@TLSLDM(%a5),%a0
3890 move.l x@TLSLDO(%a5),%a0
3891 move.l x@TLSIE(%a5),%a0
3892 move.l x@TLSLE(%a5),%a0'
3893 tls_as_opt='--fatal-warnings'
3897 .section ".tdata","awT",@progbits'
3898 tls_as_opt="--fatal-warnings"
3902 .section ".tdata","awT",%progbits
3906 add x0, x0, #:tlsgd_lo12:x
3909 tls_as_opt='--fatal-warnings'
3913 .section ".tdata","awT",@progbits
3916 l.movhi r3, tpoffha(foo)
3918 l.lwz r4, tpofflo(foo)(r3)'
3919 tls_as_opt=--fatal-warnings
3923 .extern __get_tpointer
3939 .section ".tdata","awT",@progbits
3947 addi 3,2,ld0@got@tlsgd
3953 addi 3,2,x1@got@tlsld
3959 addis 9,3,x2@dtprel@ha
3960 addi 9,9,x2@dtprel@l
3963 ld 9,x3@got@dtprel(2)
3967 tls_as_opt="-a64 --fatal-warnings"
3971 .section ".tdata","awT",@progbits
3979 addi 3,31,ld0@got@tlsgd
3981 addi 3,31,x1@got@tlsld
3984 addis 9,3,x2@dtprel@ha
3985 addi 9,9,x2@dtprel@l
3986 lwz 9,x3@got@tprel(31)
3989 addis 9,2,x2@tprel@ha
3990 addi 9,9,x2@tprel@l'
3991 tls_as_opt="-a32 --fatal-warnings"
3995 .section .tdata,"awT",@progbits
3999 call __tls_get_addr'
4000 tls_as_opt='--fatal-warnings'
4004 .section ".tdata","awT",@progbits
4013 l %r1,foo@GOTNTPOFF(%r12)
4014 l %r1,0(%r1):tls_load:foo
4015 bas %r14,0(%r1,%r13):tls_gdcall:foo
4016 bas %r14,0(%r1,%r13):tls_ldcall:foo'
4017 tls_as_opt="-m31 --fatal-warnings"
4021 .section ".tdata","awT",@progbits
4029 lg %r1,foo@GOTNTPOFF(%r12)
4030 larl %r1,foo@INDNTPOFF
4031 brasl %r14,__tls_get_offset@PLT:tls_gdcall:foo
4032 brasl %r14,__tls_get_offset@PLT:tls_ldcall:foo'
4033 tls_as_opt="-m64 -Aesame --fatal-warnings"
4035 sh-*-* | sh[123456789lbe]*-*-*)
4037 .section ".tdata","awT",@progbits
4045 tls_as_opt=--fatal-warnings
4049 sparc*-sun-solaris2.*)
4056 if test x$on_solaris = xyes && test x$gas_flag = xno; then
4058 .section ".tdata",#alloc,#write,#tls'
4061 .section ".tdata","awT",@progbits'
4062 tls_as_opt="-32 --fatal-warnings"
4064 conftest_s="$conftest_s
4067 sethi %tgd_hi22(foo), %o0
4068 add %o0, %tgd_lo10(foo), %o1
4069 add %l7, %o1, %o0, %tgd_add(foo)
4070 call __tls_get_addr, %tgd_call(foo)
4071 sethi %tldm_hi22(foo), %l1
4072 add %l1, %tldm_lo10(foo), %l2
4073 add %l7, %l2, %o0, %tldm_add(foo)
4074 call __tls_get_addr, %tldm_call(foo)
4075 sethi %tldo_hix22(foo), %l3
4076 xor %l3, %tldo_lox10(foo), %l4
4077 add %o0, %l4, %l5, %tldo_add(foo)
4078 sethi %tie_hi22(foo), %o3
4079 add %o3, %tie_lo10(foo), %o3
4080 ld [%l7 + %o3], %o2, %tie_ld(foo)
4081 add %g7, %o2, %o4, %tie_add(foo)
4082 sethi %tle_hix22(foo), %l1
4083 xor %l1, %tle_lox10(foo), %o5
4084 ld [%g7 + %o5], %o1"
4088 .section ".tdata","awT",@progbits
4091 movi a8, foo@TLSFUNC
4092 movi a10, foo@TLSARG
4093 callx8.tls a8, foo@TLSCALL'
4098 if test "x$enable_tls" = xno ; then
4099 : # TLS explicitly disabled.
4100 elif test "x$enable_tls" = xyes ; then
4101 set_have_as_tls=yes # TLS explicitly enabled.
4102 elif test -z "$conftest_s"; then
4103 : # If we don't have a check, assume no support.
4105 gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
4106 [$tls_as_opt], [$conftest_s],,
4107 [set_have_as_tls=yes])
4109 if test $set_have_as_tls = yes ; then
4110 AC_DEFINE(HAVE_AS_TLS, 1,
4111 [Define if your assembler and linker support thread-local storage.])
4114 # Target-specific assembler checks.
4116 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
4117 gcc_cv_ld_static_dynamic=no
4118 gcc_cv_ld_static_option='-Bstatic'
4119 gcc_cv_ld_dynamic_option='-Bdynamic'
4120 if test $in_tree_ld = yes ; then
4121 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
4122 gcc_cv_ld_static_dynamic=yes
4124 elif test x$gcc_cv_ld != x; then
4125 # Check if linker supports -Bstatic/-Bdynamic option
4126 if $gcc_cv_ld --help 2>&1 | grep -- -Bstatic > /dev/null \
4127 && $gcc_cv_ld --help 2>&1 | grep -- -Bdynamic > /dev/null; then
4128 gcc_cv_ld_static_dynamic=yes
4131 # AIX ld uses -b flags
4132 *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
4133 gcc_cv_ld_static_dynamic=yes
4134 gcc_cv_ld_static_option="-bstatic"
4135 gcc_cv_ld_dynamic_option="-bdynamic"
4137 # HP-UX ld uses -a flags to select between shared and archive.
4139 if test x"$gnu_ld" = xno; then
4140 gcc_cv_ld_static_dynamic=yes
4141 gcc_cv_ld_static_option="-aarchive_shared"
4142 gcc_cv_ld_dynamic_option="-adefault"
4145 # Solaris 2 ld always supports -Bstatic/-Bdynamic.
4147 gcc_cv_ld_static_dynamic=yes
4152 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
4153 AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
4154 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
4155 AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
4156 [Define to the linker option to disable use of shared objects.])
4157 AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
4158 [Define to the linker option to enable use of shared objects.])
4160 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
4162 AC_MSG_CHECKING(linker --version-script option)
4163 gcc_cv_ld_version_script=no
4164 ld_version_script_option=''
4165 if test $in_tree_ld = yes || test x"$gnu_ld" = xyes; then
4166 gcc_cv_ld_version_script=yes
4167 ld_version_script_option='--version-script'
4168 elif test x$gcc_cv_ld != x; then
4170 # Solaris 2 ld always supports -M. It also supports a subset of
4171 # --version-script since Solaris 11.4, but requires
4172 # -z gnu-version-script-compat to activate.
4174 gcc_cv_ld_version_script=yes
4175 ld_version_script_option='-M'
4179 # Don't AC_DEFINE result, only used in jit/Make-lang.in so far.
4180 AC_MSG_RESULT($gcc_cv_ld_version_script)
4181 AC_SUBST(ld_version_script_option)
4183 AC_MSG_CHECKING(linker soname option)
4185 if test $in_tree_ld = yes || test x"$gnu_ld" = xyes; then
4186 gcc_cv_ld_soname=yes
4187 ld_soname_option='-soname'
4188 elif test x$gcc_cv_ld != x; then
4191 gcc_cv_ld_soname=yes
4192 ld_soname_option='-install_name'
4194 # Solaris 2 ld always supports -h. It also supports --soname for GNU
4195 # ld compatiblity since some Solaris 10 update.
4197 gcc_cv_ld_soname=yes
4198 ld_soname_option='-h'
4202 # Don't AC_DEFINE result, only used in jit/Make-lang.in so far.
4203 AC_MSG_RESULT($gcc_cv_ld_soname)
4204 AC_SUBST(ld_soname_option)
4206 if test x"$demangler_in_ld" = xyes; then
4207 AC_MSG_CHECKING(linker --demangle support)
4208 gcc_cv_ld_demangle=no
4209 if test $in_tree_ld = yes; then
4210 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
4211 gcc_cv_ld_demangle=yes
4213 elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
4214 # Check if the GNU linker supports --demangle option
4215 if $gcc_cv_ld --help 2>&1 | grep no-demangle > /dev/null; then
4216 gcc_cv_ld_demangle=yes
4219 if test x"$gcc_cv_ld_demangle" = xyes; then
4220 AC_DEFINE(HAVE_LD_DEMANGLE, 1,
4221 [Define if your linker supports --demangle option.])
4223 AC_MSG_RESULT($gcc_cv_ld_demangle)
4226 AC_MSG_CHECKING(linker plugin support)
4228 if test -f liblto_plugin.la; then
4229 save_ld_ver="$ld_ver"
4230 save_ld_vers_major="$ld_vers_major"
4231 save_ld_vers_minor="$ld_vers_minor"
4232 save_ld_is_gold="$ld_is_gold"
4236 if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
4238 # FIXME: ld_is_gold?
4239 ld_vers_major="$gcc_cv_gld_major_version"
4240 ld_vers_minor="$gcc_cv_gld_minor_version"
4242 # Determine plugin linker version.
4243 # FIXME: Partial duplicate from above, generalize.
4245 ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
4246 if echo "$ld_ver" | grep GNU > /dev/null; then
4247 if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
4249 ld_vers=`echo $ld_ver | sed -n \
4250 -e 's,^[^)]*[ ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
4252 ld_vers=`echo $ld_ver | sed -n \
4253 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
4255 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
4256 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
4261 # Determine plugin support.
4262 if echo "$ld_ver" | grep GNU > /dev/null; then
4263 # Require GNU ld or gold 2.21+ for plugin support by default.
4264 if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
4266 elif test "$ld_is_mold" = yes; then
4268 # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
4269 elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
4274 ld_ver="$save_ld_ver"
4275 ld_vers_major="$save_ld_vers_major"
4276 ld_vers_minor="$save_ld_vers_minor"
4277 ld_is_gold="$save_ld_is_gold"
4279 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
4280 [Define to the level of your linker's plugin support.])
4281 AC_MSG_RESULT($gcc_cv_lto_plugin)
4283 # Target OS-specific assembler checks.
4285 case "$target_os" in
4287 gcc_GAS_CHECK_FEATURE([-mmacosx-version-min option],
4288 gcc_cv_as_mmacosx_version_min,
4289 [-mmacosx-version-min=10.1], [.text],,
4290 [AC_DEFINE(HAVE_AS_MMACOSX_VERSION_MIN_OPTION, 1,
4291 [Define if your Mac OS X assembler supports the -mmacos-version-min option.])])
4295 # Target CPU-specific assembler checks.
4299 gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,
4300 [-mabi=lp64], [.text],,,)
4301 if test x$gcc_cv_as_aarch64_mabi = xyes; then
4302 AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
4303 [Define if your assembler supports the -mabi option.])
4305 if test x$with_abi = xilp32; then
4306 AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
4307 Upgrade the Assembler.])
4309 if test x"$with_multilib_list" = xdefault; then
4310 TM_MULTILIB_CONFIG=lp64
4312 aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
4313 for aarch64_multilib in ${aarch64_multilibs}; do
4314 case ${aarch64_multilib} in
4316 AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
4317 Upgrade the Assembler.])
4325 # Check if we have binutils support for relocations types needed by -fpic
4326 gcc_GAS_CHECK_FEATURE([-fpic relocs], gcc_cv_as_aarch64_picreloc,,
4329 ldr x0, [[x2, #:gotpage_lo15:globalsym]]
4330 ],,[AC_DEFINE(HAVE_AS_SMALL_PIC_RELOCS, 1,
4331 [Define if your assembler supports relocs needed by -fpic.])])
4332 # Enable Branch Target Identification Mechanism and Return Address
4333 # Signing by default.
4334 AC_ARG_ENABLE(standard-branch-protection,
4336 AS_HELP_STRING([--enable-standard-branch-protection],
4337 [enable Branch Target Identification Mechanism and Return Address Signing by default for AArch64])
4338 AS_HELP_STRING([--disable-standard-branch-protection],
4339 [disable Branch Target Identification Mechanism and Return Address Signing by default for AArch64])
4344 tm_defines="${tm_defines} TARGET_ENABLE_BTI=1 TARGET_ENABLE_PAC_RET=1"
4349 AC_MSG_ERROR(['$enableval' is an invalid value for --enable-standard-branch-protection.\
4350 Valid choices are 'yes' and 'no'.])
4355 # Enable default workaround for AArch64 Cortex-A53 erratum 835769.
4356 AC_ARG_ENABLE(fix-cortex-a53-835769,
4358 AS_HELP_STRING([--enable-fix-cortex-a53-835769],
4359 [enable workaround for AArch64 Cortex-A53 erratum 835769 by default])
4360 AS_HELP_STRING([--disable-fix-cortex-a53-835769],
4361 [disable workaround for AArch64 Cortex-A53 erratum 835769 by default])
4366 tm_defines="${tm_defines} TARGET_FIX_ERR_A53_835769_DEFAULT=1"
4371 AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-835769.\
4372 Valid choices are 'yes' and 'no'.])
4378 # Enable default workaround for AArch64 Cortex-A53 erratum 843419.
4379 AC_ARG_ENABLE(fix-cortex-a53-843419,
4381 AS_HELP_STRING([--enable-fix-cortex-a53-843419],
4382 [enable workaround for AArch64 Cortex-A53 erratum 843419 by default])
4383 AS_HELP_STRING([--disable-fix-cortex-a53-843419],
4384 [disable workaround for AArch64 Cortex-A53 erratum 843419 by default])
4389 tm_defines="${tm_defines} TARGET_FIX_ERR_A53_843419_DEFAULT=1"
4394 AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-843419.\
4395 Valid choices are 'yes' and 'no'.])
4403 # All TARGET_ABI_OSF targets.
4404 alpha*-*-linux* | alpha*-*-*bsd*)
4405 gcc_GAS_CHECK_FEATURE([explicit relocation support],
4406 gcc_cv_as_alpha_explicit_relocs,,
4409 extbl $3, $2, $3 !lituse_bytoff!1
4410 ldq $2, a($29) !literal!1
4411 ldq $4, b($29) !literal!2
4412 ldq_u $3, 0($2) !lituse_base!1
4413 ldq $27, f($29) !literal!5
4414 jsr $26, ($27), f !lituse_jsr!5
4415 ldah $29, 0($26) !gpdisp!3
4416 lda $0, c($29) !gprel
4417 ldah $1, d($29) !gprelhigh
4418 lda $1, d($1) !gprellow
4419 lda $29, 0($29) !gpdisp!3],,
4420 [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
4421 [Define if your assembler supports explicit relocations.])])
4422 gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
4423 gcc_cv_as_alpha_jsrdirect_relocs,,
4426 ldq $27, a($29) !literal!1
4427 jsr $26, ($27), a !lituse_jsrdirect!1],,
4428 [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
4429 [Define if your assembler supports the lituse_jsrdirect relocation.])])
4433 gcc_GAS_CHECK_FEATURE([--mlink-relax option], gcc_cv_as_avr_mlink_relax,
4434 [--mlink-relax], [.text],,
4435 [AC_DEFINE(HAVE_AS_AVR_MLINK_RELAX_OPTION, 1,
4436 [Define if your avr assembler supports --mlink-relax option.])])
4438 gcc_GAS_CHECK_FEATURE([-mrmw option], gcc_cv_as_avr_mrmw,
4440 [AC_DEFINE(HAVE_AS_AVR_MRMW_OPTION, 1,
4441 [Define if your avr assembler supports -mrmw option.])])
4443 gcc_GAS_CHECK_FEATURE([__gcc_isr pseudo instruction],
4444 gcc_cv_as_avr_mgccisr,
4450 [AC_DEFINE(HAVE_AS_AVR_MGCCISR_OPTION, 1,
4451 [Define if your avr assembler supports -mgcc-isr option.])])
4453 # Check how default linker description file implements .rodata for
4454 # avrxmega3 (PR21472). avr-gcc assumes .rodata is *not* loaded to
4455 # RAM so avr-gcc skips __do_copy_data for .rodata objects.
4456 AC_MSG_CHECKING(binutils for avrxmega3 .rodata support)
4457 cat > conftest.s <<EOF
4458 .section .rodata,"a",@progbits
4460 ;; avr-nm should print "... R xxvaryy", not "... D xxvaryy".
4465 AC_TRY_COMMAND([$gcc_cv_as -mmcu=avrxmega3 conftest.s -o conftest.o])
4466 AC_TRY_COMMAND([$gcc_cv_ld -mavrxmega3 conftest.o -o conftest.elf])
4467 AC_TRY_COMMAND([$gcc_cv_nm conftest.elf > conftest.nm])
4468 if test -s conftest.nm
4470 if grep ' R xxvaryy' conftest.nm > /dev/null; then
4472 AC_DEFINE(HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH, 1,
4473 [Define if your default avr linker script for avrxmega3 leaves .rodata in flash.])
4475 AC_MSG_RESULT(no: avrxmega3 .rodata located in RAM)
4476 echo "$as_me: nm output was" >&AS_MESSAGE_LOG_FD
4477 cat conftest.nm >&AS_MESSAGE_LOG_FD
4478 avr_ld_ver="`$gcc_cv_ld -v | sed -e 's:^.* ::'`"
4479 AC_MSG_WARN([[support for avrxmega3 .rodata in flash needs Binutils 2.29 or higher (have $avr_ld_ver)]])
4482 AC_MSG_RESULT(test failed)
4483 echo "$as_me: failed program was" >&AS_MESSAGE_LOG_FD
4484 cat conftest.s >&AS_MESSAGE_LOG_FD
4485 AC_MSG_WARN([[see `config.log' for details]])
4487 rm -f conftest.s conftest.o conftest.elf conftest.nm
4491 gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
4492 gcc_cv_as_cris_no_mul_bug,
4493 [-no-mul-bug-abort], [.text],,
4494 [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
4495 [Define if your assembler supports the -no-mul-bug-abort option.])])
4499 gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,
4501 [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
4502 [Define if your assembler supports -relax option.])])
4504 gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
4505 gcc_cv_as_sparc_gotdata_op,
4512 sethi %gdop_hix22(foo), %g1
4513 xor %g1, %gdop_lox10(foo), %g1
4514 ld [[%l7 + %g1]], %g2, %gdop(foo)],
4515 [if test x$gcc_cv_ld != x \
4516 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
4517 if test x$gcc_cv_objdump != x; then
4518 if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
4519 | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
4520 gcc_cv_as_sparc_gotdata_op=no
4522 gcc_cv_as_sparc_gotdata_op=yes
4527 [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
4528 [Define if your assembler and linker support GOTDATA_OP relocs.])])
4530 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
4531 gcc_cv_as_sparc_ua_pcrel,
4539 .uaword %r_disp32(foo)],
4540 [if test x$gcc_cv_ld != x \
4541 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
4542 gcc_cv_as_sparc_ua_pcrel=yes
4545 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
4546 [Define if your assembler and linker support unaligned PC relative relocs.])
4548 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
4549 gcc_cv_as_sparc_ua_pcrel_hidden,
4554 .uaword %r_disp32(foo)
4555 .byte 0x32, 0x33, 0x34
4560 [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4561 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
4562 && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
4563 | grep ' 31000000 07323334' > /dev/null 2>&1; then
4564 if $gcc_cv_objdump -R conftest 2> /dev/null \
4565 | grep 'DISP32' > /dev/null 2>&1; then
4568 gcc_cv_as_sparc_ua_pcrel_hidden=yes
4572 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
4573 [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
4574 ]) # unaligned pcrel relocs
4576 gcc_GAS_CHECK_FEATURE([offsetable %lo()],
4577 gcc_cv_as_sparc_offsetable_lo10,
4580 or %g1, %lo(ab) + 12, %g1
4581 or %g1, %lo(ab + 12), %g1],
4582 [if test x$gcc_cv_objdump != x \
4583 && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
4584 | grep ' 82106000 82106000' > /dev/null 2>&1; then
4585 gcc_cv_as_sparc_offsetable_lo10=yes
4587 [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
4588 [Define if your assembler supports offsetable %lo().])])
4590 gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
4591 gcc_cv_as_sparc_fmaf,
4594 .register %g2, #scratch
4595 .register %g3, #scratch
4597 fmaddd %f0, %f2, %f4, %f6
4598 addxccc %g1, %g2, %g3
4599 fsrl32 %f2, %f4, %f8
4600 fnaddd %f10, %f12, %f14],,
4601 [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
4602 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
4604 gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
4605 gcc_cv_as_sparc_sparc4,
4608 .register %g2, #scratch
4609 .register %g3, #scratch
4612 1: cwbneg %g2, %g3, 1f
4615 aes_kexpand0 %f4, %f6, %f8
4616 des_round %f38, %f40, %f42, %f44
4617 camellia_f %f54, %f56, %f58, %f60
4618 kasumi_fi_xor %f46, %f48, %f50, %f52],,
4619 [AC_DEFINE(HAVE_AS_SPARC4, 1,
4620 [Define if your assembler supports SPARC4 instructions.])])
4622 gcc_GAS_CHECK_FEATURE([SPARC5 and VIS 4.0 instructions],
4623 gcc_cv_as_sparc_sparc5,
4626 .register %g2, #scratch
4627 .register %g3, #scratch
4630 fpadd8 %f0, %f2, %f4],,
4631 [AC_DEFINE(HAVE_AS_SPARC5_VIS4, 1,
4632 [Define if your assembler supports SPARC5 and VIS 4.0 instructions.])])
4634 gcc_GAS_CHECK_FEATURE([SPARC6 instructions],
4635 gcc_cv_as_sparc_sparc6,
4638 .register %g2, #scratch
4639 .register %g3, #scratch
4642 fpsll64x %f0, %f2, %f4],,
4643 [AC_DEFINE(HAVE_AS_SPARC6, 1,
4644 [Define if your assembler supports SPARC6 instructions.])])
4646 gcc_GAS_CHECK_FEATURE([LEON instructions],
4647 gcc_cv_as_sparc_leon,
4650 .register %g2, #scratch
4651 .register %g3, #scratch
4655 casa [[%g2]] 0xb, %g3, %g1],,
4656 [AC_DEFINE(HAVE_AS_LEON, 1,
4657 [Define if your assembler supports LEON instructions.])])
4661 i[34567]86-*-* | x86_64-*-*)
4665 # Full C++ conformance when using a shared libstdc++-v3 requires some
4666 # support from the Cygwin DLL, which in more recent versions exports
4667 # wrappers to aid in interposing and redirecting operators new, delete,
4668 # etc., as per n2800 #17.6.4.6 [replacement.functions]. Check if we
4669 # are configuring for a version of Cygwin that exports the wrappers.
4670 if test x$host = x$target && test x$host_cpu = xi686; then
4671 AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
4673 # Can't check presence of libc functions during cross-compile, so
4674 # we just have to assume we're building for an up-to-date target.
4675 gcc_ac_cygwin_dll_wrappers=yes
4677 AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
4678 [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
4679 [Define if you want to generate code by default that assumes that the
4680 Cygwin DLL exports wrappers to support libstdc++ function replacement.])
4683 cygwin* | pe | mingw32*)
4684 # Recent binutils allows the three-operand form of ".comm" on PE. This
4685 # definition is used unconditionally to initialise the default state of
4686 # the target option variable that governs usage of the feature.
4687 gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,,
4689 AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
4690 [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
4691 [Define if your assembler supports specifying the alignment
4692 of objects allocated using the GAS .comm command.])
4693 # Used for DWARF 2 in PE
4694 gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
4695 gcc_cv_as_ix86_pe_secrel32,,
4700 [if test x$gcc_cv_ld != x \
4701 && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
4702 gcc_cv_as_ix86_pe_secrel32=yes
4705 [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
4706 [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
4707 # Test if the assembler supports the extended form of the .section
4708 # directive that specifies section alignment. LTO support uses this,
4709 # but normally only after installation, so we warn but don't fail the
4710 # configure if LTO is enabled but the assembler does not support it.
4711 gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
4712 -fatal-warnings,[.section lto_test,"dr0"])
4713 if test x$gcc_cv_as_section_has_align != xyes; then
4714 case ",$enable_languages," in
4716 AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
4723 darwin2* | darwin19*)
4724 gcc_GAS_CHECK_FEATURE([llvm assembler x86-pad-for-align option],
4725 gcc_cv_as_mllvm_x86_pad_for_align,
4726 [-mllvm -x86-pad-for-align=false], [.text],,
4727 [AC_DEFINE(HAVE_AS_MLLVM_X86_PAD_FOR_ALIGN, 1,
4728 [Define if your Mac OS X assembler supports -mllvm -x86-pad-for-align=false.])])
4732 gcc_GAS_CHECK_FEATURE([-xbrace_comment], gcc_cv_as_ix86_xbrace_comment,
4733 [-xbrace_comment=no], [.text],,
4734 [AC_DEFINE(HAVE_AS_XBRACE_COMMENT_OPTION, 1,
4735 [Define if your assembler supports -xbrace_comment option.])])
4737 gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
4738 gcc_cv_as_ix86_filds,,
4739 [filds (%ebp); fists (%ebp)],,
4740 [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
4741 [Define if your assembler uses filds and fists mnemonics.])])
4743 gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
4744 gcc_cv_as_ix86_fildq,,
4745 [fildq (%ebp); fistpq (%ebp)],,
4746 [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
4747 [Define if your assembler uses fildq and fistq mnemonics.])])
4749 gcc_GAS_CHECK_FEATURE([cmov syntax],
4750 gcc_cv_as_ix86_cmov_sun_syntax,,
4751 [cmovl.l %edx, %eax],,
4752 [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
4753 [Define if your assembler supports the Sun syntax for cmov.])])
4755 gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
4756 gcc_cv_as_ix86_ffreep,,
4758 [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
4759 [Define if your assembler supports the ffreep mnemonic.])])
4761 gcc_GAS_CHECK_FEATURE([.quad directive],
4762 gcc_cv_as_ix86_quad,,
4764 [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
4765 [Define if your assembler supports the .quad directive.])])
4767 gcc_GAS_CHECK_FEATURE([sahf mnemonic],
4768 gcc_cv_as_ix86_sahf,,
4771 [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
4772 [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
4774 gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
4775 gcc_cv_as_ix86_interunit_movq,,
4779 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
4780 [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
4781 [Define if your assembler supports interunit movq mnemonic.])
4783 gcc_GAS_CHECK_FEATURE([hle prefixes],
4784 gcc_cv_as_ix86_hle,,
4785 [lock xacquire cmpxchg %esi, (%ecx)],,
4786 [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
4787 [Define if your assembler supports HLE prefixes.])])
4789 gcc_GAS_CHECK_FEATURE([swap suffix],
4790 gcc_cv_as_ix86_swap,,
4791 [movl.s %esp, %ebp],,
4792 [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
4793 [Define if your assembler supports the swap suffix.])])
4795 gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
4796 gcc_cv_as_ix86_diff_sect_delta,,
4804 [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
4805 [Define if your assembler supports the subtraction of symbols in different sections.])])
4807 gcc_GAS_CHECK_FEATURE([rep and lock prefix],
4808 gcc_cv_as_ix86_rep_lock_prefix,,
4814 lock addl %edi, (%eax,%esi)
4815 lock orl $0, (%esp)],,
4816 [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
4817 [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
4819 gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
4820 gcc_cv_as_ix86_ud2,,
4822 [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
4823 [Define if your assembler supports the 'ud2' mnemonic.])])
4825 # Enforce 32-bit output with gas and gld.
4826 if test x$gas = xyes; then
4827 as_ix86_gas_32_opt="--32"
4829 if echo "$ld_ver" | grep GNU > /dev/null; then
4830 if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
4831 ld_ix86_gld_32_opt="-melf_i386_sol2"
4833 ld_ix86_gld_32_opt="-melf_i386"
4837 gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
4838 gcc_cv_as_ix86_tlsgdplt,
4839 [$as_ix86_gas_32_opt],
4840 [call tls_gd@tlsgdplt],
4841 [if test x$gcc_cv_ld != x \
4842 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4843 gcc_cv_as_ix86_tlsgdplt=yes
4846 [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
4847 [Define if your assembler and linker support @tlsgdplt.])])
4850 .section .tdata,"aw'$tls_section_flag'",@progbits
4852 .section .text,"ax",@progbits
4853 call tls_ld@tlsldmplt'
4855 gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
4856 gcc_cv_as_ix86_tlsldmplt,
4857 [$as_ix86_gas_32_opt],
4859 [if test x$gcc_cv_ld != x \
4860 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4861 gcc_cv_as_ix86_tlsldmplt=yes
4864 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
4865 [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
4866 [Define to 1 if your assembler and linker support @tlsldmplt.])
4869 .section .text,"ax",@progbits
4871 .type _start, @function
4873 leal value@tlsldm(%ebx), %eax
4874 call ___tls_get_addr@plt
4876 .section .tdata,"aw'$tls_section_flag'",@progbits
4877 .type value, @object
4879 gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
4880 gcc_cv_as_ix86_tlsldm,
4881 [$as_ix86_gas_32_opt],
4883 [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4884 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
4885 if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
4886 || dis conftest 2>/dev/null | grep nop > /dev/null; then
4887 gcc_cv_as_ix86_tlsldm=yes
4891 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
4892 [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
4893 [Define to 1 if your assembler and linker support @tlsldm.])
4904 gcc_GAS_CHECK_FEATURE([R_386_GOT32X reloc],
4905 gcc_cv_as_ix86_got32x,
4906 [$as_ix86_gas_32_opt],
4908 [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4909 && test x$gcc_cv_readelf != x \
4910 && $gcc_cv_readelf --relocs --wide conftest.o 2>&1 \
4911 | grep R_386_GOT32X > /dev/null 2>&1 \
4912 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4913 if $gcc_cv_objdump -dw conftest 2>&1 \
4914 | grep 0xffffff > /dev/null 2>&1; then
4915 gcc_cv_as_ix86_got32x=no
4917 gcc_cv_as_ix86_got32x=yes
4921 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_GOT32X,
4922 [`if test x"$gcc_cv_as_ix86_got32x" = xyes; then echo 1; else echo 0; fi`],
4923 [Define 0/1 if your assembler and linker support @GOT.])
4925 gcc_GAS_CHECK_FEATURE([GOTOFF in data],
4926 gcc_cv_as_ix86_gotoff_in_data,
4927 [$as_ix86_gas_32_opt],
4933 AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
4934 [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
4935 [Define true if the assembler supports '.long foo@GOTOFF'.])
4938 .section .text,"ax",@progbits
4940 .type _start, @function
4942 leal ld@tlsldm(%ecx), %eax
4943 call *___tls_get_addr@GOT(%ecx)
4944 leal gd@tlsgd(%ecx), %eax
4945 call *___tls_get_addr@GOT(%ecx)
4947 .section .tdata,"aw'$tls_section_flag'",@progbits
4955 gcc_GAS_CHECK_FEATURE([calling ___tls_get_addr via GOT],
4956 gcc_cv_as_ix86_tls_get_addr_via_got,
4957 [$as_ix86_gas_32_opt],
4959 [if test x$gcc_cv_ld != x \
4960 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4961 gcc_cv_as_ix86_tls_get_addr_via_got=yes
4964 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLS_GET_ADDR_GOT,
4965 [`if test x"$gcc_cv_as_ix86_tls_get_addr_via_got" = xyes; then echo 1; else echo 0; fi`],
4966 [Define 0/1 if your assembler and linker support calling ___tls_get_addr via GOT.])
4970 gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
4971 gcc_cv_as_ia64_ltoffx_ldxmov_relocs,,
4973 addl r15 = @ltoffx(x#), gp
4975 ld8.mov r16 = [[r15]], x#
4977 [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
4978 [Define if your assembler supports ltoffx and ldxmov relocations.])])
4986 gcc_GAS_CHECK_FEATURE([.machine directive support],
4987 gcc_cv_as_machine_directive,,
4988 [ .machine ppc7400])
4989 if test x$gcc_cv_as_machine_directive != xyes; then
4990 echo "*** This target requires an assembler supporting \".machine\"" >&2
4991 echo you can get it from: https://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
4992 test x$build = x$target && exit 1
4998 *-*-aix*) conftest_s=' .machine "pwr5"
5001 *-*-darwin*) conftest_s=' .text
5003 *) conftest_s=' .machine power4
5008 gcc_GAS_CHECK_FEATURE([mfcr field support],
5009 gcc_cv_as_powerpc_mfcrf,,
5011 [AC_DEFINE(HAVE_AS_MFCRF, 1,
5012 [Define if your assembler supports mfcr field.])])
5015 *-*-aix*) conftest_s=' .csect .text[[PR]]
5017 addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
5021 addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
5022 *) conftest_s=' .text
5024 addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
5027 gcc_GAS_CHECK_FEATURE([rel16 relocs],
5028 gcc_cv_as_powerpc_rel16, -a32,
5030 [AC_DEFINE(HAVE_AS_REL16, 1,
5031 [Define if your assembler supports R_PPC_REL16 relocs.])])
5034 *-*-aix*) conftest_s=' .machine "pwr7"
5037 *) conftest_s=' .machine power7
5042 gcc_GAS_CHECK_FEATURE([vector-scalar support],
5043 gcc_cv_as_powerpc_vsx, -a32,
5045 [AC_DEFINE(HAVE_AS_VSX, 1,
5046 [Define if your assembler supports VSX instructions.])])
5048 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5049 gcc_cv_as_powerpc_gnu_attribute,,
5050 [.gnu_attribute 4,1],,
5051 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5052 [Define if your assembler supports .gnu_attribute.])])
5054 gcc_GAS_CHECK_FEATURE([prologue entry point marker support],
5055 gcc_cv_as_powerpc_entry_markers,-a64 --fatal-warnings,
5056 [ .reloc .,R_PPC64_ENTRY; nop],,
5057 [AC_DEFINE(HAVE_AS_ENTRY_MARKERS, 1,
5058 [Define if your assembler supports the R_PPC64_ENTRY relocation.])])
5060 gcc_GAS_CHECK_FEATURE([plt sequence marker support],
5061 gcc_cv_as_powerpc_pltseq_markers,-a32 --fatal-warnings,
5062 [ .reloc .,R_PPC_PLTSEQ; nop],,
5063 [AC_DEFINE(HAVE_AS_PLTSEQ, 1,
5064 [Define if your assembler supports R_PPC*_PLTSEQ relocations.])])
5068 gcc_GAS_CHECK_FEATURE([AIX .ref support],
5070 [ .csect stuff[[rw]]
5076 [AC_DEFINE(HAVE_AS_REF, 1,
5077 [Define if your assembler supports .ref])])
5079 gcc_GAS_CHECK_FEATURE([AIX DWARF location lists section support],
5080 gcc_cv_as_aix_dwloc,,
5085 [AC_DEFINE(HAVE_XCOFF_DWARF_EXTRAS, 1,
5086 [Define if your assembler supports AIX debug frame section label reference.])])
5092 gcc_GAS_CHECK_FEATURE([explicit relocation support],
5093 gcc_cv_as_mips_explicit_relocs,,
5094 [ lw $4,%gp_rel(foo)($4)],,
5095 [if test x$target_cpu_default = x
5096 then target_cpu_default=MASK_EXPLICIT_RELOCS
5097 else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
5100 gcc_GAS_CHECK_FEATURE([-mno-shared support],
5101 gcc_cv_as_mips_no_shared,[-mno-shared], [nop],,
5102 [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
5103 [Define if the assembler understands -mno-shared.])])
5105 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5106 gcc_cv_as_mips_gnu_attribute,,
5107 [.gnu_attribute 4,1],,
5108 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5109 [Define if your assembler supports .gnu_attribute.])])
5111 gcc_GAS_CHECK_FEATURE([.module support],
5112 gcc_cv_as_mips_dot_module,[-32],
5115 [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
5116 [Define if your assembler supports .module.])])
5117 if test x$gcc_cv_as_mips_dot_module = xno \
5118 && test x$with_fp_32 != x; then
5120 [Requesting --with-fp-32= requires assembler support for .module.])
5123 gcc_GAS_CHECK_FEATURE([.micromips support],
5124 gcc_cv_as_micromips_support,[--fatal-warnings],
5126 [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
5127 [Define if your assembler supports the .set micromips directive])])
5129 gcc_GAS_CHECK_FEATURE([.dtprelword support],
5130 gcc_cv_as_mips_dtprelword,,
5131 [.section .tdata,"awT",@progbits
5135 .dtprelword x+0x8000],,
5136 [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
5137 [Define if your assembler supports .dtprelword.])])
5139 gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
5140 gcc_cv_as_mips_dspr1_mult,,
5150 [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
5151 [Define if your assembler supports DSPR1 mult.])])
5153 AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
5154 gcc_cv_as_ld_jalr_reloc=no
5155 if test $gcc_cv_as_mips_explicit_relocs = yes; then
5156 if test $in_tree_ld = yes ; then
5157 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
5158 && test $in_tree_ld_is_elf = yes; then
5159 gcc_cv_as_ld_jalr_reloc=yes
5161 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
5162 echo ' .ent x' > conftest.s
5163 echo 'x: lw $2,%got_disp(y)($3)' >> conftest.s
5164 echo ' lw $25,%call16(y)($28)' >> conftest.s
5165 echo ' .reloc 1f,R_MIPS_JALR,y' >> conftest.s
5166 echo '1: jalr $25' >> conftest.s
5167 echo ' .reloc 1f,R_MIPS_JALR,x' >> conftest.s
5168 echo '1: jalr $25' >> conftest.s
5169 echo ' .end x' >> conftest.s
5170 if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
5171 && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
5172 if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
5173 && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
5174 gcc_cv_as_ld_jalr_reloc=yes
5180 if test $gcc_cv_as_ld_jalr_reloc = yes; then
5181 if test x$target_cpu_default = x; then
5182 target_cpu_default=MASK_RELAX_PIC_CALLS
5184 target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
5187 AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
5189 AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
5190 [gcc_cv_ld_mips_personality_relaxation],
5191 [gcc_cv_ld_mips_personality_relaxation=no
5192 if test $in_tree_ld = yes ; then
5193 if test "$gcc_cv_gld_major_version" -eq 2 \
5194 -a "$gcc_cv_gld_minor_version" -ge 21 \
5195 -o "$gcc_cv_gld_major_version" -gt 2; then
5196 gcc_cv_ld_mips_personality_relaxation=yes
5198 elif test x$gcc_cv_as != x \
5199 -a x$gcc_cv_ld != x \
5200 -a x$gcc_cv_readelf != x ; then
5201 cat > conftest.s <<EOF
5203 .cfi_personality 0x80,indirect_ptr
5210 .section .data,"aw",@progbits
5214 if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
5215 && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
5216 if $gcc_cv_readelf -d conftest 2>&1 \
5217 | grep TEXTREL > /dev/null 2>&1; then
5219 elif $gcc_cv_readelf --relocs conftest 2>&1 \
5220 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
5223 gcc_cv_ld_mips_personality_relaxation=yes
5227 rm -f conftest.s conftest.o conftest])
5228 if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
5229 AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
5230 [Define if your linker can relax absolute .eh_frame personality
5231 pointers into PC-relative form.])
5234 gcc_GAS_CHECK_FEATURE([-mnan= support],
5237 [AC_DEFINE(HAVE_AS_NAN, 1,
5238 [Define if the assembler understands -mnan=.])])
5239 if test x$gcc_cv_as_mips_nan = xno \
5240 && test x$with_nan != x; then
5242 [Requesting --with-nan= requires assembler support for -mnan=])
5246 # Earlier GAS versions generically support .gnu_attribute, but the
5247 # msp430 assembler will not do anything with it.
5248 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5249 gcc_cv_as_msp430_gnu_attribute,,
5250 [.gnu_attribute 4,1],,
5251 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5252 [Define if your assembler supports .gnu_attribute.])])
5253 gcc_GAS_CHECK_FEATURE([.mspabi_attribute support],
5254 gcc_cv_as_msp430_mspabi_attribute,,
5255 [.mspabi_attribute 4,2],,
5256 [AC_DEFINE(HAVE_AS_MSPABI_ATTRIBUTE, 1,
5257 [Define if your assembler supports .mspabi_attribute.])])
5258 if test x$enable_newlib_nano_formatted_io = xyes; then
5259 AC_DEFINE(HAVE_NEWLIB_NANO_FORMATTED_IO, 1, [Define if GCC has been
5260 configured with --enable-newlib-nano-formatted-io.])
5264 # Versions 2.33 and earlier lacked support for the %gotoff relocation
5265 # syntax that is documented in the ABI specification.
5266 gcc_GAS_CHECK_FEATURE([support for %gotoff relocations in constant data],
5267 gcc_cv_as_nios2_gotoff_relocation,,
5270 .long %gotoff(foo)],,
5271 [AC_DEFINE(HAVE_AS_NIOS2_GOTOFF_RELOCATION, 1,
5272 [Define if your assembler supports %gotoff relocation syntax.])])
5275 gcc_GAS_CHECK_FEATURE([.attribute support],
5276 gcc_cv_as_riscv_attribute,,
5277 [.attribute stack_align,4],,
5278 [AC_DEFINE(HAVE_AS_RISCV_ATTRIBUTE, 1,
5279 [Define if your assembler supports .attribute.])])
5280 gcc_GAS_CHECK_FEATURE([-misa-spec= support],
5281 gcc_cv_as_riscv_isa_spec,
5283 [AC_DEFINE(HAVE_AS_MISA_SPEC, 1,
5284 [Define if the assembler understands -misa-spec=.])])
5285 gcc_GAS_CHECK_FEATURE([-march=rv32i_zifencei support],
5286 gcc_cv_as_riscv_march_zifencei,
5287 [-march=rv32i_zifencei2p0],,,
5288 [AC_DEFINE(HAVE_AS_MARCH_ZIFENCEI, 1,
5289 [Define if the assembler understands -march=rv*_zifencei.])])
5292 gcc_GAS_CHECK_FEATURE([.dtprelword support],
5293 gcc_cv_as_loongarch_dtprelword, [2,18,0],,
5294 [.section .tdata,"awT",@progbits
5298 .dtprelword x+0x8000],,
5299 [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
5300 [Define if your assembler supports .dtprelword.])])
5301 gcc_GAS_CHECK_FEATURE([explicit relocation support],
5302 gcc_cv_as_loongarch_explicit_relocs,,
5303 [a:pcalau12i $t0,%pc_hi20(a)],,
5304 [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
5305 [Define if your assembler supports explicit relocation.])])
5306 gcc_GAS_CHECK_FEATURE([eh_frame pcrel encoding support],
5307 gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support,,
5309 .cfi_personality 0x9b,a
5312 [AC_DEFINE(HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT, 1,
5313 [Define if your assembler supports eh_frame pcrel encoding.])])
5316 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5317 gcc_cv_as_s390_gnu_attribute,,
5318 [.gnu_attribute 8,1],,
5319 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5320 [Define if your assembler supports .gnu_attribute.])])
5321 gcc_GAS_CHECK_FEATURE([.machine and .machinemode support],
5322 gcc_cv_as_s390_machine_machinemode,,
5327 [AC_DEFINE(HAVE_AS_MACHINE_MACHINEMODE, 1,
5328 [Define if your assembler supports .machine and .machinemode.])])
5329 gcc_GAS_CHECK_FEATURE([architecture modifiers support],
5330 gcc_cv_as_s390_architecture_modifiers,,
5331 [ .machine z13+vx ],,
5332 [AC_DEFINE(HAVE_AS_ARCHITECTURE_MODIFIERS, 1,
5333 [Define if your assembler supports architecture modifiers.])])
5334 gcc_GAS_CHECK_FEATURE([vector load/store alignment hints],
5335 gcc_cv_as_s390_vector_loadstore_alignment_hints,,
5336 [ vl %v24,0(%r15),3 ],,
5337 [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS, 1,
5338 [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument.])])
5339 gcc_GAS_CHECK_FEATURE([vector load/store alignment hints on z13],
5340 gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13, [-mzarch -march=z13],
5341 [ vl %v24,0(%r15),3 ],,
5342 [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS_ON_Z13, 1,
5343 [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument on z13.])])
5348 # Mips, LoongArch and HP-UX need the GNU assembler.
5349 # Linux on IA64 might be able to use the Intel assembler.
5352 mips*-*-* | loongarch*-*-* | *-*-hpux* )
5353 if test x$gas_flag = xyes \
5354 || test x"$host" != x"$build" \
5355 || test ! -x "$gcc_cv_as" \
5356 || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
5359 echo "*** This configuration requires the GNU assembler" >&2
5365 # AMD GCN needs the LLVM assembler and linker.
5366 # Test that LLVM is at least 13.0.1.
5369 AC_MSG_CHECKING(llvm assembler version)
5370 gcc_cv_as_version="unknown"
5371 if test x$gcc_cv_as != x; then
5372 gcc_cv_as_version=`$gcc_cv_as --version 2>&1 | sed -ne '/version/s/.* \([[0-9]]\)/\1/p' || echo error`
5373 case "$gcc_cv_as_version" in
5374 13.0.[[1-9]]*) ;; # 13.0.1+
5375 13.[[1-9]]*) ;; # 13.1+
5376 1[[4-9]]*) ;; # 14..19
5377 [[2-9]][[0-9]]*) ;; # 20..99
5378 [[1-9]][[0-9]][[0-9]]*) ;; # 100+
5379 error) AC_MSG_ERROR([cannot determine LLVM version]) ;;
5380 *) AC_MSG_ERROR([LLVM 13.0.1 or later is required (found LLVM $gcc_cv_as_version)]) ;;
5383 AC_MSG_RESULT([$gcc_cv_as_version, ok])
5389 gcc_GAS_CHECK_FEATURE([assembler for arm accepts context-specific architecture extensions],
5390 gcc_cv_as_arm_option_extensions,
5391 [-march=armv8.1-m.main+mve],
5396 [AC_DEFINE(HAVE_GAS_ARM_EXTENDED_ARCH, 1,
5397 [Define if your Arm assembler permits context-specific feature extensions.])])
5400 # ??? Not all targets support dwarf2 debug_line, even within a version
5401 # of gas. Moreover, we need to emit a valid instruction to trigger any
5402 # info to the output file. So, as supported targets are added to gas 2.11,
5403 # add some instruction here to (also) show we expect this might work.
5404 # ??? Once 2.11 is released, probably need to add first known working
5405 # version to the per-target configury.
5407 aarch64 | alpha | arc | arm | avr | bfin | cris | csky | i386 | loongarch | m32c \
5408 | m68k | microblaze | mips | nds32 | nios2 | pa | riscv | rs6000 | score | sparc \
5409 | visium | xstormy16 | xtensa)
5419 if test x"$insn" != x; then
5421 .file 1 \"conftest.s\"
5424 gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
5425 gcc_cv_as_dwarf2_debug_line,,
5427 [if test x$gcc_cv_objdump != x \
5428 && $gcc_cv_objdump -h conftest.o 2> /dev/null \
5429 | grep debug_line > /dev/null 2>&1; then
5430 gcc_cv_as_dwarf2_debug_line=yes
5431 elif test x$gcc_cv_otool != x \
5432 && $gcc_cv_otool -l conftest.o 2> /dev/null \
5433 | grep debug_line > /dev/null 2>&1; then
5434 gcc_cv_as_dwarf2_debug_line=yes
5437 # The .debug_line file table must be in the exact order that
5438 # we specified the files, since these indices are also used
5439 # by DW_AT_decl_file. Approximate this test by testing if
5440 # the assembler bitches if the same index is assigned twice.
5441 gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
5442 gcc_cv_as_dwarf2_file_buggy,,
5446 if test $gcc_cv_as_dwarf2_debug_line = yes \
5447 && test $gcc_cv_as_dwarf2_file_buggy = no; then
5448 AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
5449 [Define if your assembler supports dwarf2 .file/.loc directives,
5450 and preserves file table indices exactly as given.])
5452 if test $gcc_cv_as_leb128 = yes; then
5454 .file 1 \"conftest.s\"
5455 .loc 1 3 0 view .LVU1
5461 gcc_GAS_CHECK_FEATURE([dwarf2 debug_view support],
5462 gcc_cv_as_dwarf2_debug_view,,
5464 [AC_DEFINE(HAVE_AS_DWARF2_DEBUG_VIEW, 1,
5465 [Define if your assembler supports views in dwarf2 .loc directives.])])
5469 gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
5470 gcc_cv_as_gdwarf2_flag,
5471 [--gdwarf2], [$insn],,
5472 [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
5473 [Define if your assembler supports the --gdwarf2 option.])])
5475 gcc_GAS_CHECK_FEATURE([--gdwarf-5 option],
5476 gcc_cv_as_gdwarf_5_flag,
5477 [--gdwarf-5], [$insn],
5478 [if test x$gcc_cv_objdump != x \
5479 && $gcc_cv_objdump -Wi conftest.o 2>&1 \
5480 | grep DW_TAG_compile_unit > /dev/null 2>&1; then
5481 gcc_cv_as_gdwarf_5_flag=yes;
5482 fi],[AC_DEFINE(HAVE_AS_GDWARF_5_DEBUG_FLAG, 1,
5483 [Define if your assembler supports the --gdwarf-5 option.])])
5486 win32 | pe | cygwin* | mingw32*)
5487 section_flags=\"dr\"
5488 function_type=".def foo; .scl 2; .type 32; .endef"
5491 section_flags=\"\",%progbits
5492 function_type=".type foo, %function"
5493 function_size=".size foo, .-foo";;
5495 dwarf4_debug_info_size=0x46
5496 dwarf4_high_pc_form=7
5497 dwarf4_debug_aranges_size=0x2c
5499 for dwarf4_addr_size in 8 4; do
5515 .section .debug_info,$section_flags
5517 .4byte $dwarf4_debug_info_size
5519 .4byte .Ldebug_abbrev0
5520 .byte 0x$dwarf4_addr_size
5522 .ascii \"GNU C17\\0\"
5526 .${dwarf4_addr_size}byte .Ltext0
5527 .${dwarf4_addr_size}byte .Letext0-.Ltext0
5528 .4byte .Ldebug_line0
5534 .${dwarf4_addr_size}byte .LFB0
5535 .${dwarf4_addr_size}byte .LFE0-.LFB0
5539 .section .debug_abbrev,$section_flags
5555 .byte 0x$dwarf4_high_pc_form
5576 .byte 0x$dwarf4_high_pc_form
5582 .section .debug_aranges,$section_flags
5583 .4byte $dwarf4_debug_aranges_size
5585 .4byte .Ldebug_info0
5590 .${dwarf4_addr_size}byte .Ltext0
5591 .${dwarf4_addr_size}byte .Letext0-.Ltext0
5592 .${dwarf4_addr_size}byte 0
5593 .${dwarf4_addr_size}byte 0
5594 .section .debug_line,$section_flags
5596 .4byte .LELT0-.LSLT0
5599 .4byte .LELTP0-.LASLTP0
5627 .byte 0x$dwarf4_line_sz
5629 .${dwarf4_addr_size}byte .LM1
5634 .byte 0x$dwarf4_line_sz
5636 .${dwarf4_addr_size}byte .LM2
5641 .byte 0x$dwarf4_line_sz
5643 .${dwarf4_addr_size}byte .Letext0
5648 .section .debug_str,$section_flags
5652 if test $dwarf4_addr_size = 4; then
5653 gcc_GAS_CHECK_FEATURE([assembly of compiler generated 32-bit .debug_line],
5654 gcc_cv_as_debug_line_32_flag,,
5656 [dwarf4_success=yes])
5658 gcc_GAS_CHECK_FEATURE([assembly of compiler generated 64-bit .debug_line],
5659 gcc_cv_as_debug_line_64_flag,,
5661 [dwarf4_success=yes])
5663 if test $dwarf4_success = yes; then
5665 gcc_GAS_CHECK_FEATURE([--gdwarf-4 not refusing compiler generated .debug_line],
5666 gcc_cv_as_dwarf_4_debug_line_flag,
5667 [--gdwarf-4], [$conftest_s],,
5668 [dwarf4_success=yes])
5671 dwarf4_debug_info_size=0x36
5672 dwarf4_high_pc_form=6
5673 dwarf4_debug_aranges_size=0x1c
5677 if test $dwarf4_success = yes; then
5695 gcc_GAS_CHECK_FEATURE([--gdwarf-4 with the APP marker],
5696 gcc_cv_as_dwarf_4_app_flag,
5697 [--gdwarf-4], [$conftest_s],, [dwarf4_success=yes])
5700 if test $dwarf4_success = yes; then
5710 gcc_GAS_CHECK_FEATURE([working --gdwarf-4/--gdwarf-5 for all sources],
5711 gcc_cv_as_working_gdwarf_n_flag,
5715 if test x$gcc_cv_objdump != x \
5716 && $gcc_cv_objdump -W conftest.o 2>&1 \
5717 | grep conftest.s > /dev/null 2>&1; then
5718 gcc_cv_as_working_gdwarf_n_flag=no
5720 gcc_cv_as_working_gdwarf_n_flag=yes
5722 changequote([,])dnl])
5723 if test $gcc_cv_as_working_gdwarf_n_flag = yes; then
5724 AC_DEFINE(HAVE_AS_WORKING_DWARF_N_FLAG, 1,
5725 [Define if your assembler supports --gdwarf-4/--gdwarf-5 even with
5726 compiler generated .debug_line.])
5730 gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
5731 gcc_cv_as_debug_prefix_map_flag,
5732 [--debug-prefix-map /a=/b], [$insn],,
5733 [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
5734 [Define if your assembler supports the --debug-prefix-map option.])])
5737 gcc_GAS_CHECK_FEATURE([compressed debug sections],
5738 gcc_cv_as_compress_debug,,,
5739 [# gas compiled without zlib cannot compress debug sections and warns
5740 # about it, but still exits successfully. So check for this, too.
5741 if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
5743 gcc_cv_as_compress_debug=0
5744 elif $gcc_cv_as --compress-debug-sections=zlib -o conftest.o conftest.s > /dev/null 2>&1
5746 gcc_cv_as_compress_debug=1
5747 gcc_cv_as_compress_debug_option="--compress-debug-sections"
5748 gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
5749 # Since binutils 2.40, gas supports --compress-debug-sections=zstd.
5750 if $gcc_cv_as --compress-debug-sections=zstd -o conftest.o conftest.s > /dev/null 2>&1
5752 gcc_cv_as_compress_debug=2
5755 gcc_cv_as_compress_debug=0
5757 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
5758 [Define to the level of your assembler's compressed debug section support.])
5759 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
5760 [Define to the assembler option to enable compressed debug sections.])
5761 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
5762 [Define to the assembler option to disable compressed debug sections.])
5764 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,,
5766 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
5767 [Define if your assembler supports .lcomm with an alignment field.])])
5769 if test x$with_sysroot = x && test x$host = x$target \
5770 && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
5771 && test "$prefix" != "NONE"; then
5772 AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
5773 [Define to PREFIX/include if cpp should also search that directory.])
5776 # Determine the version of glibc, if any, used on the target.
5777 AC_MSG_CHECKING([for target glibc version])
5778 AC_ARG_WITH([glibc-version],
5779 [AS_HELP_STRING([--with-glibc-version=M.N],
5780 [assume GCC used with glibc version M.N or later])], [
5781 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
5782 glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
5783 glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
5785 AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
5787 glibc_version_major=0
5788 glibc_version_minor=0
5789 [if test -f $target_header_dir/features.h \
5790 && glibc_version_major_define=`$EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+[0-9]' $target_header_dir/features.h` \
5791 && glibc_version_minor_define=`$EGREP '^[ ]*#[ ]*define[ ]+__GLIBC_MINOR__[ ]+[0-9]' $target_header_dir/features.h`; then
5792 glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[ ]*//'`
5793 glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[ ]*//'`
5795 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
5796 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MAJOR], [$glibc_version_major],
5797 [GNU C Library major version number used on the target, or 0.])
5798 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MINOR], [$glibc_version_minor],
5799 [GNU C Library minor version number used on the target, or 0.])
5801 AC_ARG_ENABLE(gnu-unique-object,
5802 [AS_HELP_STRING([--enable-gnu-unique-object],
5803 [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
5804 [case $enable_gnu_unique_object in
5806 *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
5807 Valid choices are 'yes' and 'no'.]) ;;
5809 [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,,
5810 [.type foo, '$target_type_format_char'gnu_unique_object],,
5811 # We need to unquote above to to use the definition from config.gcc.
5812 # Also check for ld.so support, i.e. glibc 2.11 or higher.
5813 [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
5815 if test x$enable_gnu_unique_object = xyes; then
5816 AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
5817 [Define if your assembler supports @gnu_unique_object.])
5820 AC_CACHE_CHECK([assembler for tolerance to line number 0],
5821 [gcc_cv_as_line_zero],
5822 [gcc_cv_as_line_zero=no
5823 if test "x$gcc_cv_as" != x; then
5824 { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
5825 if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
5826 test "x`cat conftest.out`" = x
5828 gcc_cv_as_line_zero=yes
5830 echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
5831 cat conftest.s >&AS_MESSAGE_LOG_FD
5832 echo "configure: error output was" >&AS_MESSAGE_LOG_FD
5833 cat conftest.out >&AS_MESSAGE_LOG_FD
5835 rm -f conftest.o conftest.s conftest.out
5837 if test "x$gcc_cv_as_line_zero" = xyes; then
5838 AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
5839 [Define if the assembler won't complain about a line such as # 0 "" 2.])
5842 AC_MSG_CHECKING(support for thin archives)
5843 thin_archive_support=no
5844 echo 'int main (void) { return 0; }' > conftest.c
5845 if ($AR --version | sed 1q | grep "GNU ar" \
5846 && $CC $CFLAGS -c conftest.c \
5847 && $AR rcT conftest.a conftest.o \
5848 && $CC $CFLAGS $LDFLAGS -o conftest conftest.a) >/dev/null 2>&1; then
5849 thin_archive_support=yes
5851 rm -f conftest.c conftest.o conftest.a conftest
5852 AC_MSG_RESULT($thin_archive_support)
5853 AC_SUBST(thin_archive_support)
5855 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
5856 gcc_cv_ld_eh_frame_hdr=no
5857 if test $in_tree_ld = yes ; then
5858 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
5859 && test $in_tree_ld_is_elf = yes; then
5860 gcc_cv_ld_eh_frame_hdr=yes
5862 elif test x$gcc_cv_ld != x; then
5863 if echo "$ld_ver" | grep GNU > /dev/null; then
5864 # Check if linker supports --eh-frame-hdr option
5865 if $gcc_cv_ld --help 2>&1 | grep eh-frame-hdr > /dev/null; then
5866 gcc_cv_ld_eh_frame_hdr=yes
5871 # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
5872 if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
5873 gcc_cv_ld_eh_frame_hdr=yes
5879 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
5880 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
5881 AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
5882 [Define if your linker supports .eh_frame_hdr.])
5884 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
5886 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
5887 gcc_cv_ld_eh_frame_ciev3=no
5888 if test $in_tree_ld = yes ; then
5889 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5890 && test $in_tree_ld_is_elf = yes; then
5891 gcc_cv_ld_eh_frame_ciev3=yes
5893 elif test x$gcc_cv_ld != x; then
5894 if echo "$ld_ver" | grep GNU > /dev/null; then
5895 gcc_cv_ld_eh_frame_ciev3=yes
5896 if test 0"$ld_date" -lt 20040513; then
5897 if test -n "$ld_date"; then
5898 # If there was date string, but was earlier than 2004-05-13, fail
5899 gcc_cv_ld_eh_frame_ciev3=no
5900 elif test "$ld_vers_major" -lt 2; then
5901 gcc_cv_ld_eh_frame_ciev3=no
5902 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
5903 gcc_cv_ld_eh_frame_ciev3=no
5909 # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
5910 if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
5911 gcc_cv_ld_eh_frame_ciev3=yes
5917 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
5918 [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
5919 [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
5920 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
5922 AC_MSG_CHECKING(linker position independent executable support)
5924 if test $in_tree_ld = yes ; then
5926 # Full PIE support on Solaris was only introduced in gld 2.26.
5927 *-*-solaris2*) gcc_gld_pie_min_version=26 ;;
5928 *) gcc_gld_pie_min_version=15 ;;
5930 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge "$gcc_gld_pie_min_version" -o "$gcc_cv_gld_major_version" -gt 2 \
5931 && test $in_tree_ld_is_elf = yes; then
5934 elif test x$gcc_cv_ld != x; then
5935 # Check if linker supports -pie option
5936 if $gcc_cv_ld --help 2>&1 | grep -- -pie > /dev/null; then
5940 if echo "$ld_ver" | grep GNU > /dev/null \
5941 && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5948 *-*-solaris2.1[[1-9]]*)
5949 # Solaris 11.3 added PIE support.
5950 if $gcc_cv_ld -z help 2>&1 | grep -- type.*pie > /dev/null; then
5957 if test x"$gcc_cv_ld_pie" = xyes; then
5958 AC_DEFINE(HAVE_LD_PIE, 1,
5959 [Define if your linker supports PIE option.])
5961 AC_MSG_RESULT($gcc_cv_ld_pie)
5963 AC_MSG_CHECKING(linker PIE support with copy reloc)
5964 gcc_cv_ld_pie_copyreloc=no
5965 if test $gcc_cv_ld_pie = yes ; then
5966 if test $in_tree_ld = yes ; then
5967 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
5968 gcc_cv_ld_pie_copyreloc=yes
5970 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5971 # Check if linker supports -pie option with copy reloc
5973 i?86-*-linux* | x86_64-*-linux*)
5974 cat > conftest1.s <<EOF
5977 .type a_glob, @object
5982 cat > conftest2.s <<EOF
5985 .type main, @function
5987 movl %eax, a_glob(%rip)
5990 .section .data.rel,"aw",@progbits
5995 if $gcc_cv_as --64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5996 && $gcc_cv_ld -shared -melf_x86_64 -o conftest1.so conftest1.o > /dev/null 2>&1 \
5997 && $gcc_cv_as --64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5998 && $gcc_cv_ld -pie -melf_x86_64 -o conftest conftest2.o conftest1.so > /dev/null 2>&1; then
5999 gcc_cv_ld_pie_copyreloc=yes
6001 rm -f conftest conftest1.so conftest1.o conftest2.o conftest1.s conftest2.s
6006 AC_DEFINE_UNQUOTED(HAVE_LD_PIE_COPYRELOC,
6007 [`if test x"$gcc_cv_ld_pie_copyreloc" = xyes; then echo 1; else echo 0; fi`],
6008 [Define 0/1 if your linker supports -pie option with copy reloc.])
6009 AC_MSG_RESULT($gcc_cv_ld_pie_copyreloc)
6011 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
6012 gcc_cv_ld_eh_gc_sections=no
6013 if test $in_tree_ld = yes ; then
6014 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
6015 && test $in_tree_ld_is_elf = yes; then
6016 gcc_cv_ld_eh_gc_sections=yes
6018 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
6019 cat > conftest.s <<EOF
6022 .type _start, @function
6025 .size _start, .-_start
6026 .section .text.foo,"ax",@progbits
6027 .type foo, @function
6031 .section .gcc_except_table.foo,"a",@progbits
6034 .section .eh_frame,"a",@progbits
6037 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
6038 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
6039 | grep "gc-sections option ignored" > /dev/null; then
6040 gcc_cv_ld_eh_gc_sections=no
6041 elif $gcc_cv_objdump -h conftest 2> /dev/null \
6042 | grep gcc_except_table > /dev/null; then
6043 gcc_cv_ld_eh_gc_sections=yes
6044 # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
6045 if test x$gcc_cv_as_comdat_group != xyes; then
6046 gcc_cv_ld_eh_gc_sections=no
6047 cat > conftest.s <<EOF
6050 .type _start, @function
6053 .size _start, .-_start
6054 .section .gnu.linkonce.t.foo,"ax",@progbits
6055 .type foo, @function
6059 .section .gcc_except_table.foo,"a",@progbits
6062 .section .eh_frame,"a",@progbits
6065 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
6066 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
6067 | grep "gc-sections option ignored" > /dev/null; then
6068 gcc_cv_ld_eh_gc_sections=no
6069 elif $gcc_cv_objdump -h conftest 2> /dev/null \
6070 | grep gcc_except_table > /dev/null; then
6071 gcc_cv_ld_eh_gc_sections=yes
6077 rm -f conftest.s conftest.o conftest
6081 # ??? This apparently exposes a binutils bug with PC-relative relocations.
6082 gcc_cv_ld_eh_gc_sections=no
6085 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
6086 AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
6087 [Define if your linker supports garbage collection of
6088 sections in presence of EH frames.])
6090 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
6092 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
6093 gcc_cv_ld_eh_gc_sections_bug=no
6094 if test $in_tree_ld = yes ; then
6095 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
6096 && test $in_tree_ld_is_elf = yes; then
6097 gcc_cv_ld_eh_gc_sections_bug=yes
6099 elif test x$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
6100 gcc_cv_ld_eh_gc_sections_bug=yes
6101 cat > conftest.s <<EOF
6104 .type _start, @function
6107 .size _start, .-_start
6108 .section .text.startup.foo,"ax",@progbits
6109 .type foo, @function
6113 .section .gcc_except_table.foo,"a",@progbits
6116 .section .eh_frame,"a",@progbits
6119 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
6120 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
6121 | grep "gc-sections option ignored" > /dev/null; then
6123 elif $gcc_cv_objdump -h conftest 2> /dev/null \
6124 | grep gcc_except_table > /dev/null; then
6125 gcc_cv_ld_eh_gc_sections_bug=no
6128 rm -f conftest.s conftest.o conftest
6130 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
6131 AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
6132 [Define if your linker has buggy garbage collection of
6133 sections support when .text.startup.foo like sections are used.])
6135 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
6137 AC_MSG_CHECKING(linker for compressed debug sections)
6138 # GNU ld/gold support --compressed-debug-sections=zlib since binutils 2.26.
6139 if $gcc_cv_ld --help 2>&1 | grep -- '--compress-debug-sections.*\<zlib-gabi\>' > /dev/null; then
6140 gcc_cv_ld_compress_debug=1
6141 gcc_cv_ld_compress_debug_option="--compress-debug-sections"
6142 # Detect zstd debug section compression support
6143 if $gcc_cv_ld --help 2>&1 | grep -- '--compress-debug-sections.*\<zstd\>' > /dev/null; then
6144 gcc_cv_ld_compress_debug=2
6150 # Introduced in Solaris 11.2.
6151 if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
6152 gcc_cv_ld_compress_debug=1
6153 gcc_cv_ld_compress_debug_option="-z compress-sections"
6155 gcc_cv_ld_compress_debug=0
6159 # Assume linkers other than GNU ld don't support compessed debug
6161 gcc_cv_ld_compress_debug=0
6166 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
6167 [Define to the level of your linker's compressed debug section support.])
6168 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
6169 [Define to the linker option to enable compressed debug sections.])
6170 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
6172 if test x"$ld64_flag" = x"yes"; then
6174 # Set defaults for possibly untestable items.
6175 gcc_cv_ld64_export_dynamic=0
6176 gcc_cv_ld64_platform_version=0
6178 if test "$build" = "$host"; then
6184 # On Darwin, because of FAT library support, it is often possible to execute
6185 # exes from compatible archs even when the host differs from the build system.
6186 case "$build","$host" in
6187 x86_64-*-darwin*,i?86-*-darwin* | powerpc64*-*-darwin*,powerpc*-*-darwin*)
6192 # If the configurer specified a minimum ld64 version to be supported, then use
6193 # that to determine feature support.
6194 if test x"${gcc_cv_ld64_version}" != x; then
6195 AC_MSG_CHECKING(ld64 specified version)
6196 gcc_cv_ld64_major=`echo "$gcc_cv_ld64_version" | sed -e 's/\..*//'`
6197 AC_MSG_RESULT($gcc_cv_ld64_major)
6198 if test "$gcc_cv_ld64_major" -ge 236; then
6199 gcc_cv_ld64_export_dynamic=1
6201 if test "$gcc_cv_ld64_major" -ge 512; then
6202 gcc_cv_ld64_platform_version=1
6204 elif test -x "$gcc_cv_ld" -a "$darwin_try_test" -eq 1; then
6205 # If the version was not specified, try to find it.
6206 AC_MSG_CHECKING(linker version)
6207 if test x"${gcc_cv_ld64_version}" = x; then
6208 gcc_cv_ld64_version=`$gcc_cv_ld -v 2>&1 | grep ld64 | sed s/.*ld64-// | awk '{print $1}'`
6210 AC_MSG_RESULT($gcc_cv_ld64_version)
6212 AC_MSG_CHECKING(linker for -export_dynamic support)
6213 gcc_cv_ld64_export_dynamic=1
6214 if $gcc_cv_ld -export_dynamic < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
6215 gcc_cv_ld64_export_dynamic=0
6217 AC_MSG_RESULT($gcc_cv_ld64_export_dynamic)
6219 AC_MSG_CHECKING(linker for -platform_version support)
6220 gcc_cv_ld64_platform_version=1
6221 if $gcc_cv_ld -platform_version macos 10.5 0.0 < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
6222 gcc_cv_ld64_platform_version=0
6224 AC_MSG_RESULT($gcc_cv_ld64_platform_version)
6227 if test x"${gcc_cv_ld64_version}" != x; then
6228 AC_DEFINE_UNQUOTED(LD64_VERSION, "${gcc_cv_ld64_version}",
6229 [Define to ld64 version.])
6232 AC_DEFINE_UNQUOTED(LD64_HAS_EXPORT_DYNAMIC, $gcc_cv_ld64_export_dynamic,
6233 [Define to 1 if ld64 supports '-export_dynamic'.])
6235 AC_DEFINE_UNQUOTED(LD64_HAS_PLATFORM_VERSION, $gcc_cv_ld64_platform_version,
6236 [Define to 1 if ld64 supports '-platform_version'.])
6239 if test x"$dsymutil_flag" = x"yes"; then
6241 # If the user specified a dsymutil path, then we will already have the
6242 # version string, otherwise, pick it up.
6243 if test x"$gcc_cv_dsymutil" = x; then
6244 AC_MSG_WARN([dsymutil is a required tool for this system, but not found])
6245 dsymutil_vers="tool unspecified"
6246 elif test x"$dsymutil_vers" = x; then
6247 dsymutil_vers=`$gcc_cv_dsymutil -v /dev/null 2>&1`
6250 dsymutil_temp=`echo $dsymutil_vers | sed 1q`
6251 AC_MSG_CHECKING(dsymutil version "$dsymutil_temp")
6252 if echo $dsymutil_temp | grep dwarfutils- > /dev/null; then
6253 dsymutil_kind=DWARFUTILS
6254 dsymutil_vers=`echo $dsymutil_temp | sed 's/.*dwarfutils-\([[0-9\.]]*\).*/\1/'`
6255 elif echo $dsymutil_temp | grep clang- > /dev/null; then
6257 dsymutil_vers=`echo $dsymutil_temp | sed 's/.*clang-\([[0-9\.]]*\).*/\1/'`
6258 elif echo $dsymutil_temp | grep 'LLVM version ' > /dev/null; then
6260 dsymutil_vers=`echo $dsymutil_temp | sed 's/.*LLVM\ version\ \([[0-9\.]]*\).*/\1/'`
6262 dsymutil_kind=UNKNOWN
6265 dsymutil_major=`expr "$dsymutil_vers" : '\([[0-9]]*\)'`
6266 dsymutil_minor=`expr "$dsymutil_vers" : '[[0-9]]*\.\([[0-9]]*\)'`
6267 dsymutil_tiny=`expr "$dsymutil_vers" : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
6268 if test x"${dsymutil_minor}" = x; then
6271 if test x"${dsymutil_tiny}" = x; then
6274 AC_DEFINE_UNQUOTED(DSYMUTIL_VERSION, [$dsymutil_kind,${dsymutil_major},${dsymutil_minor},${dsymutil_tiny}],
6275 [Define to the dsymutil version.])
6276 AC_MSG_RESULT($dsymutil_vers : $dsymutil_kind ${dsymutil_major} ${dsymutil_minor} ${dsymutil_tiny} )
6280 win32 | pe | cygwin* | mingw32*)
6281 AC_MSG_CHECKING(broken PE linker dwarf5 support)
6282 gcc_cv_ld_broken_pe_dwarf5=yes
6283 if test $in_tree_ld = yes ; then
6284 if grep -q '\.debug_loclists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
6285 $gcc_cv_ld_gld_srcdir/scripttempl/pe*.sc \
6286 && grep -q '\.debug_rnglists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
6287 $gcc_cv_ld_gld_srcdir/scripttempl/pe*.sc; then
6288 gcc_cv_ld_broken_pe_dwarf5=no
6291 if $gcc_cv_ld --verbose 2>&1 | grep -q '\.debug_loclists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
6292 && $gcc_cv_ld --verbose 2>&1 | grep -q '\.debug_rnglists.*BLOCK.*__section_alignment__.*NOLOAD.*:'; then
6293 gcc_cv_ld_broken_pe_dwarf5=no
6296 if test x$gcc_cv_ld_broken_pe_dwarf5 = xyes; then
6297 AC_DEFINE(HAVE_LD_BROKEN_PE_DWARF5, 1,
6298 [Define if the PE linker has broken DWARF 5 support.])
6300 AC_MSG_RESULT($gcc_cv_ld_broken_pe_dwarf5)
6302 AC_MSG_CHECKING(PE linker --disable-dynamicbase support)
6303 gcc_cv_ld_disable_dynamicbase=no
6304 if test $in_tree_ld = yes; then
6305 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 36 -o "$gcc_cv_gld_major_version" -gt 2; then \
6306 gcc_cv_ld_disable_dynamicbase=yes
6309 if $gcc_cv_ld --help 2>&1 | grep -q 'disable\-]dynamicbase' > /dev/null; then
6310 gcc_cv_ld_disable_dynamicbase=yes
6313 if test x"$gcc_cv_ld_disable_dynamicbase" = xyes; then
6314 AC_DEFINE(HAVE_LD_PE_DISABLE_DYNAMICBASE, 1,
6315 [Define if the PE linker supports --disable-dynamicbase option.])
6317 AC_MSG_RESULT($gcc_cv_ld_disable_dynamicbase)
6325 AC_CACHE_CHECK(linker --as-needed support,
6326 gcc_cv_ld_as_needed,
6327 [gcc_cv_ld_as_needed=no
6328 gcc_cv_ld_as_needed_option='--as-needed'
6329 gcc_cv_ld_no_as_needed_option='--no-as-needed'
6330 if test $in_tree_ld = yes ; then
6331 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
6332 && test $in_tree_ld_is_elf = yes; then
6333 gcc_cv_ld_as_needed=yes
6334 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 28; then
6335 gcc_cv_ld_as_needed_option='--push-state --as-needed'
6336 gcc_cv_ld_no_as_needed_option='--pop-state'
6339 elif test x$gcc_cv_ld != x; then
6340 # Check if linker supports --as-needed and --no-as-needed options
6341 if $gcc_cv_ld --help 2>&1 | grep as-needed > /dev/null; then
6342 gcc_cv_ld_as_needed=yes
6343 if $gcc_cv_ld --help 2>&1 | grep push-state > /dev/null \
6344 && $gcc_cv_ld --help 2>&1 | grep pop-state > /dev/null \
6345 && echo "$ld_ver" | grep GNU > /dev/null \
6346 && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 28; then
6347 # Use these options only when both ld.bfd and ld.gold support
6348 # --push-state/--pop-state, which unfortunately wasn't added
6350 gcc_cv_ld_as_needed_option='--push-state --as-needed'
6351 gcc_cv_ld_no_as_needed_option='--pop-state'
6354 case "$target:$gnu_ld" in
6356 # Solaris 2 ld always supports -z ignore/-z record. Prefer the native
6358 gcc_cv_ld_as_needed=yes
6359 gcc_cv_ld_as_needed_option="-z ignore"
6360 gcc_cv_ld_no_as_needed_option="-z record"
6364 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
6365 # dl_iterate_phdr, i.e. since Solaris 11.
6367 *-*-solaris2.1[[1-9]]*)
6369 i?86-*-* | x86_64-*-*)
6370 if echo "$ld_ver" | grep GNU > /dev/null; then
6371 # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
6372 gcc_cv_ld_as_needed=no
6378 gcc_cv_ld_as_needed=no
6382 if test x"$gcc_cv_ld_as_needed" = xyes; then
6383 AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
6384 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
6385 AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
6386 [Define to the linker option to ignore unused dependencies.])
6387 AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
6388 [Define to the linker option to keep unused dependencies.])
6391 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
6392 saved_LDFLAGS="$LDFLAGS"
6393 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
6394 LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
6395 AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void) {return 0;}])],
6396 [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
6398 LDFLAGS="$saved_LDFLAGS"
6399 if test "x$gcc_cv_ld_clearcap" = xyes; then
6400 AC_DEFINE([HAVE_LD_CLEARCAP], 1,
6401 [Define if the linker supports clearing hardware capabilities via mapfile.])
6402 AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
6404 AC_MSG_RESULT($gcc_cv_ld_clearcap)
6410 emul_name="-melf32lppc"
6413 emul_name="-melf32ppc"
6416 AC_CACHE_CHECK(linker .gnu.attributes long double support,
6418 [gcc_cv_ld_ppc_attr=no
6419 if test x"$ld_is_gold" = xyes; then
6420 gcc_cv_ld_ppc_attr=yes
6421 elif test $in_tree_ld = yes ; then
6422 if test "$gcc_cv_gld_major_version" -eq 2 \
6423 -a "$gcc_cv_gld_minor_version" -ge 28 \
6424 -o "$gcc_cv_gld_major_version" -gt 2; then
6425 gcc_cv_ld_ppc_attr=yes
6427 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
6428 # check that merging the long double .gnu_attribute doesn't warn
6429 cat > conftest1.s <<EOF
6432 cat > conftest2.s <<EOF
6435 if $gcc_cv_as -a32 -o conftest1.o conftest1.s > /dev/null 2>&1 \
6436 && $gcc_cv_as -a32 -o conftest2.o conftest2.s > /dev/null 2>&1 \
6437 && $gcc_cv_ld $emul_name -r -o conftest.o conftest1.o conftest2.o > /dev/null 2> conftest.err \
6438 && test ! -s conftest.err; then
6439 gcc_cv_ld_ppc_attr=yes
6441 rm -f conftest.err conftest.o conftest1.o conftest2.o conftest1.s conftest2.s
6444 if test x$gcc_cv_ld_ppc_attr = xyes; then
6445 AC_DEFINE(HAVE_LD_PPC_GNU_ATTR_LONG_DOUBLE, 1,
6446 [Define if your PowerPC linker has .gnu.attributes long double support.])
6451 case "$target:$tm_file" in
6452 powerpc64*-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
6455 emul_name="-melf64lppc"
6458 emul_name="-melf64ppc"
6461 emul_name="-melf64lppc_fbsd"
6464 emul_name="-melf64ppc_fbsd"
6467 AC_CACHE_CHECK(linker support for omitting dot symbols,
6468 gcc_cv_ld_no_dot_syms,
6469 [gcc_cv_ld_no_dot_syms=no
6470 if test x"$ld_is_gold" = xyes; then
6471 gcc_cv_ld_no_dot_syms=yes
6472 elif test $in_tree_ld = yes ; then
6473 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
6474 gcc_cv_ld_no_dot_syms=yes
6476 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
6477 cat > conftest1.s <<EOF
6481 cat > conftest2.s <<EOF
6482 .section ".opd","aw"
6487 .quad .LEfoo,.TOC.@tocbase,0
6493 if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
6494 && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
6495 && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
6496 gcc_cv_ld_no_dot_syms=yes
6498 rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
6501 if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
6502 AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
6503 [Define if your PowerPC64 linker only needs function descriptor syms.])
6506 AC_CACHE_CHECK(linker large toc support,
6507 gcc_cv_ld_large_toc,
6508 [gcc_cv_ld_large_toc=no
6509 if test x"$ld_is_gold" = xyes; then
6510 gcc_cv_ld_large_toc=yes
6511 elif test $in_tree_ld = yes ; then
6512 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
6513 gcc_cv_ld_large_toc=yes
6515 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
6516 cat > conftest.s <<EOF
6517 .section ".tbss","awT",@nobits
6523 addis 9,13,ie0@got@tprel@ha
6524 ld 9,ie0@got@tprel@l(9)
6526 if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
6527 && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
6528 gcc_cv_ld_large_toc=yes
6530 rm -f conftest conftest.o conftest.s
6533 if test x"$gcc_cv_ld_large_toc" = xyes; then
6534 AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
6535 [Define if your PowerPC64 linker supports a large TOC.])
6538 AC_CACHE_CHECK(linker toc pointer alignment,
6539 gcc_cv_ld_toc_align,
6540 [if test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_nm != x; then
6541 cat > conftest.s <<EOF
6546 .section .data.rel.ro,"aw",@progbits
6551 if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
6552 && $gcc_cv_ld $emul_name -z norelro -o conftest conftest.o > /dev/null 2>&1; then
6553 gcc_cv_ld_toc_align=`$gcc_cv_nm conftest | ${AWK} '/\.TOC\./ { match ($0, "0[[[:xdigit:]]]*", a); print strtonum ("0x" substr(a[[0]], length(a[[0]])-3)) }'`
6555 rm -f conftest conftest.o conftest.s
6558 if test -n "$gcc_cv_ld_toc_align" && test $gcc_cv_ld_toc_align -gt 8; then
6559 AC_DEFINE_UNQUOTED(POWERPC64_TOC_POINTER_ALIGNMENT, $gcc_cv_ld_toc_align,
6560 [Define to .TOC. alignment forced by your linker.])
6567 AC_CACHE_CHECK(linker large toc support,
6568 gcc_cv_ld_large_toc,
6569 [gcc_cv_ld_large_toc=no
6570 if test x$gcc_cv_as != x ; then
6571 cat > conftest.s <<EOF
6581 if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
6582 gcc_cv_ld_large_toc=yes
6584 rm -f conftest conftest.o conftest.s
6587 if test x"$gcc_cv_ld_large_toc" = xyes; then
6588 AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
6589 [Define if your PowerPC64 linker supports a large TOC.])
6594 AC_CACHE_CHECK(linker --build-id support,
6596 [gcc_cv_ld_buildid=no
6597 if test $in_tree_ld = yes ; then
6598 if test "$gcc_cv_gld_major_version" -eq 2 -a \
6599 "$gcc_cv_gld_minor_version" -ge 18 -o \
6600 "$gcc_cv_gld_major_version" -gt 2 \
6601 && test $in_tree_ld_is_elf = yes; then
6602 gcc_cv_ld_buildid=yes
6604 elif test x$gcc_cv_ld != x; then
6605 if $gcc_cv_ld --help 2>&1 | grep build-id > /dev/null; then
6606 gcc_cv_ld_buildid=yes
6609 if test x"$gcc_cv_ld_buildid" = xyes; then
6610 AC_DEFINE(HAVE_LD_BUILDID, 1,
6611 [Define if your linker supports --build-id.])
6614 AC_ARG_ENABLE(linker-build-id,
6615 [AS_HELP_STRING([--enable-linker-build-id],
6616 [compiler will always pass --build-id to linker])],
6618 enable_linker_build_id=no)
6620 if test x"$enable_linker_build_id" = xyes; then
6621 if test x"$gcc_cv_ld_buildid" = xyes; then
6622 AC_DEFINE(ENABLE_LD_BUILDID, 1,
6623 [Define if gcc should always pass --build-id to linker.])
6625 AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
6629 # In binutils 2.21, GNU ld gained support for new emulations fully
6630 # supporting the Solaris 2 ABI. Detect their presence in the linker used.
6631 AC_CACHE_CHECK(linker *_sol2 emulation support,
6632 gcc_cv_ld_sol2_emulation,
6633 [gcc_cv_ld_sol2_emulation=no
6634 if test $in_tree_ld = yes ; then
6635 if test "$gcc_cv_gld_major_version" -eq 2 -a \
6636 "$gcc_cv_gld_minor_version" -ge 21 -o \
6637 "$gcc_cv_gld_major_version" -gt 2 \
6638 && test $in_tree_ld_is_elf = yes; then
6639 gcc_cv_ld_sol2_emulation=yes
6641 elif test x$gcc_cv_ld != x; then
6642 if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
6643 grep _sol2 > /dev/null; then
6644 gcc_cv_ld_sol2_emulation=yes
6647 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
6648 AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
6649 [Define if your linker supports the *_sol2 emulations.])
6652 AC_CACHE_CHECK(linker --sysroot support,
6654 [gcc_cv_ld_sysroot=no
6655 if test $in_tree_ld = yes ; then
6656 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
6657 gcc_cv_ld_sysroot=yes
6659 elif test x$gcc_cv_ld != x; then
6660 if $gcc_cv_ld --help 2>&1 | grep sysroot > /dev/null; then
6661 gcc_cv_ld_sysroot=yes
6664 if test x"$gcc_cv_ld_sysroot" = xyes; then
6665 AC_DEFINE(HAVE_LD_SYSROOT, 1,
6666 [Define if your linker supports --sysroot.])
6671 # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
6672 AC_CACHE_CHECK([system-provided CRTs on Solaris],
6673 gcc_cv_solaris_crts,
6674 [gcc_cv_solaris_crts=no
6675 if test x$host != x$target; then
6676 if test "x$with_sysroot" = xyes; then
6677 target_sysroot="${test_exec_prefix}/${target_noncanonical}/sys-root"
6679 target_sysroot="${with_sysroot}"
6682 target_libdir="$target_sysroot/usr/lib"
6683 # At the time they were added, gcrt1.o became a symlink for backwards
6684 # compatibility on x86, while crt1.o was added on sparc, so check for that.
6686 i?86-*-solaris2* | x86_64-*-solaris2*)
6687 if test -h "$target_libdir/gcrt1.o"; then gcc_cv_solaris_crts=yes; fi
6690 if test -f "$target_libdir/crt1.o"; then gcc_cv_solaris_crts=yes; fi
6695 if test x$gcc_cv_solaris_crts = xyes; then
6696 AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
6697 [Define if the system-provided CRTs are present on Solaris.])
6700 AC_ARG_ENABLE(libssp,
6701 [AS_HELP_STRING([--enable-libssp], [enable linking against libssp])],
6702 [case "${enableval}" in
6706 AC_MSG_ERROR([unknown libssp setting $enableval])
6710 # Test for stack protector support in target C library.
6711 AC_CACHE_CHECK(__stack_chk_fail in target C library,
6712 gcc_cv_libc_provides_ssp,
6713 [gcc_cv_libc_provides_ssp=no
6714 if test "x$enable_libssp" = "xno"; then
6715 gcc_cv_libc_provides_ssp=yes
6716 elif test "x$enable_libssp" = "xyes"; then
6717 gcc_cv_libc_provides_ssp=no
6721 # All versions of musl provide stack protector
6722 gcc_cv_libc_provides_ssp=yes;;
6723 *-*-linux* | *-*-kfreebsd*-gnu)
6724 # glibc 2.4 and later provides __stack_chk_fail and
6725 # either __stack_chk_guard, or TLS access to stack guard canary.
6726 GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
6727 [if test -f $target_header_dir/features.h \
6728 && $EGREP '^[ ]*#[ ]*define[ ]+__GNU_LIBRARY__[ ]+([1-9][0-9]|[6-9])' \
6729 $target_header_dir/features.h > /dev/null; then
6730 if $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC__[ ]+1' \
6731 $target_header_dir/features.h > /dev/null && \
6732 test -f $target_header_dir/bits/uClibc_config.h && \
6733 $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC_HAS_SSP__[ ]+1' \
6734 $target_header_dir/bits/uClibc_config.h > /dev/null; then
6735 gcc_cv_libc_provides_ssp=yes
6737 # all versions of Bionic support stack protector
6738 elif test -f $target_header_dir/sys/cdefs.h \
6739 && $EGREP '^[ ]*#[ ]*define[ ]+__BIONIC__[ ]+1' \
6740 $target_header_dir/sys/cdefs.h > /dev/null; then
6741 gcc_cv_libc_provides_ssp=yes
6745 # Avoid complicated tests (see
6746 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
6747 # simply assert that glibc does provide this, which is true for all
6748 # realistically usable GNU/Hurd configurations.
6749 # All supported versions of musl provide it as well
6750 gcc_cv_libc_provides_ssp=yes;;
6751 *-*-darwin* | *-*-freebsd* | *-*-netbsd*)
6752 AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
6753 [echo "no __stack_chk_fail on this target"])
6755 *) gcc_cv_libc_provides_ssp=no ;;
6759 if test x$gcc_cv_libc_provides_ssp = xyes; then
6760 AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
6761 [Define if your target C library provides stack protector support])
6764 # Check whether --enable-default-ssp was given.
6765 AC_ARG_ENABLE(default-ssp,
6766 [AS_HELP_STRING([--enable-default-ssp],
6767 [enable Stack Smashing Protection as default])],[
6768 if test x$gcc_cv_libc_provides_ssp = xyes; then
6770 ia64*-*-*) enable_default_ssp=no ;;
6771 *) enable_default_ssp=$enableval ;;
6774 enable_default_ssp=no
6776 enable_default_ssp=no)
6777 if test x$enable_default_ssp = xyes ; then
6778 AC_DEFINE(ENABLE_DEFAULT_SSP, 1,
6779 [Define if your target supports default stack protector and it is enabled.])
6781 AC_SUBST([enable_default_ssp])
6783 # Test for <sys/sdt.h> on the target.
6784 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
6785 AC_CACHE_CHECK([sys/sdt.h in the target C library], [gcc_cv_sys_sdt_h], [
6787 if test -f $target_header_dir/sys/sdt.h; then
6788 gcc_cv_sys_sdt_h=yes
6791 AS_IF([test x$gcc_cv_sys_sdt_h = xyes], [
6792 AC_DEFINE([HAVE_SYS_SDT_H], [1],
6793 [Define if your target C library provides sys/sdt.h])
6796 # Check if TFmode long double should be used by default or not.
6797 # Some glibc targets used DFmode long double, but with glibc 2.4
6798 # and later they can use TFmode.
6800 powerpc*-*-linux* | \
6804 AC_ARG_WITH(long-double-128,
6805 [AS_HELP_STRING([--with-long-double-128],
6806 [use 128-bit long double by default])],
6807 gcc_cv_target_ldbl128="$with_long_double_128", [
6809 s390*-*-linux-musl*)
6810 gcc_cv_target_ldbl128=yes
6812 powerpc*-*-linux-musl*)
6813 gcc_cv_target_ldbl128=no
6816 [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
6817 [gcc_cv_target_ldbl128=no
6818 grep '^[ ]*#[ ]*define[ ][ ]*__LONG_DOUBLE_MATH_OPTIONAL' \
6819 $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
6820 && gcc_cv_target_ldbl128=yes
6828 if test x$gcc_cv_target_ldbl128 = xyes; then
6829 AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
6830 [Define if TFmode long double should be the default])
6833 # Check if TFmode long double target should use the IBM extended double or IEEE
6834 # 128-bit floating point formats if long doubles are 128-bits long. The long
6835 # double type can only be switched on powerpc64 bit Linux systems where VSX is
6836 # supported. Other PowerPC systems do not build the IEEE 128-bit emulator in
6838 AC_ARG_WITH([long-double-format],
6839 [AS_HELP_STRING([--with-long-double-format={ieee,ibm}]
6840 [Specify whether PowerPC long double uses IEEE or IBM format])],[
6841 case "$target:$with_long_double_format" in
6842 powerpc64le-*-linux*:ieee | powerpc64le-*-linux*:ibm)
6845 powerpc64-*-linux*:ieee | powerpc64-*-linux*:ibm)
6846 # IEEE 128-bit emulation is only built on 64-bit VSX Linux systems
6848 power7 | power8 | power9 | power1*)
6852 AC_MSG_ERROR([Configuration option --with-long-double-format is only \
6853 supported if the default cpu is power7 or newer])
6854 with_long_double_format=""
6858 powerpc64*-*-linux*:*)
6859 AC_MSG_ERROR([--with-long-double-format argument should be ibm or ieee])
6860 with_long_double_format=""
6863 AC_MSG_ERROR([Configure option --with-long-double-format is only supported \
6864 on 64-bit PowerPC VSX Linux systems])
6865 with_long_double_format=""
6870 # Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
6871 # values in the TCB. Currently, only GLIBC 2.23 and later support this.
6872 gcc_cv_libc_provides_hwcap_in_tcb=no
6875 GCC_GLIBC_VERSION_GTE_IFELSE([2], [23], [gcc_cv_libc_provides_hwcap_in_tcb=yes], )
6878 if test x$gcc_cv_libc_provides_hwcap_in_tcb = xyes; then
6879 AC_DEFINE(TARGET_LIBC_PROVIDES_HWCAP_IN_TCB, 1,
6880 [Define if your target C Library provides the AT_HWCAP value in the TCB])
6883 # Check if the target LIBC handles PT_GNU_STACK.
6884 gcc_cv_libc_gnustack=unknown
6886 mips*-*-linux-musl*)
6887 gcc_cv_libc_gnustack=yes
6890 GCC_GLIBC_VERSION_GTE_IFELSE([2], [31], [gcc_cv_libc_gnustack=yes], )
6893 if test x$gcc_cv_libc_gnustack = xyes; then
6894 AC_DEFINE(TARGET_LIBC_GNUSTACK, 1,
6895 [Define if your target C Library properly handles PT_GNU_STACK])
6898 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
6899 gcc_cv_target_dl_iterate_phdr=unknown
6902 # <link.h> needs both a dl_iterate_phdr declaration and support for
6903 # compilation with largefile support.
6904 if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
6905 && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
6906 gcc_cv_target_dl_iterate_phdr=yes
6908 gcc_cv_target_dl_iterate_phdr=no
6911 *-*-dragonfly* | *-*-freebsd*)
6912 if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
6913 gcc_cv_target_dl_iterate_phdr=yes
6915 gcc_cv_target_dl_iterate_phdr=no
6919 gcc_cv_target_dl_iterate_phdr=yes
6922 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
6923 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
6924 AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
6925 [Define if your target C library provides the `dl_iterate_phdr' function.])
6927 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
6929 # We no longer support different GC mechanisms. Emit an error if
6930 # the user configures with --with-gc.
6932 [AS_HELP_STRING([--with-gc={page,zone}],
6933 [this option is not supported anymore. It used to choose
6934 the garbage collection mechanism to use with the compiler])],
6935 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
6938 # Libraries to use on the host. This will normally be set by the top
6939 # level Makefile. Here we simply capture the value for our Makefile.
6940 if test -z "${HOST_LIBS+set}"; then
6945 # Use the system's zlib library.
6948 dnl Very limited version of automake's enable-maintainer-mode
6950 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
6951 dnl maintainer-mode is disabled by default
6952 AC_ARG_ENABLE(maintainer-mode,
6953 [AS_HELP_STRING([--enable-maintainer-mode],
6954 [enable make rules and dependencies not useful
6955 (and sometimes confusing) to the casual installer])],
6956 maintainer_mode=$enableval,
6959 AC_MSG_RESULT($maintainer_mode)
6961 if test "$maintainer_mode" = "yes"; then
6968 dnl Variables for tags utilities; copied from automake 1.16.4+'s init.m4
6969 if test -z "$CTAGS"; then
6973 if test -z "$ETAGS"; then
6977 if test -z "$CSCOPE"; then
6982 dnl Whether to prevent multiple front-ends from linking at the same time
6984 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
6985 AC_ARG_ENABLE(link-mutex,
6986 [AS_HELP_STRING([--enable-link-mutex],
6987 [avoid linking multiple front-ends at once to avoid thrashing
6988 on the build machine])],
6989 do_link_mutex=$enableval,
6991 AC_MSG_RESULT($do_link_mutex)
6993 if test "$do_link_mutex" = "yes"; then
6998 AC_SUBST(DO_LINK_MUTEX)
7000 dnl Whether to prevent multiple GCC front-ends from linking at the same time
7002 AC_MSG_CHECKING([whether to serialize linking of multiple front-ends])
7003 AC_ARG_ENABLE(link-serialization,
7004 [AS_HELP_STRING([--enable-link-serialization],
7005 [avoid linking multiple GCC front-ends at once using make
7006 dependencies to avoid thrashing on the build machine])],
7007 do_link_serialization=$enableval,
7008 do_link_serialization=no)
7009 AC_MSG_RESULT($do_link_serialization)
7011 case "$do_link_serialization" in
7013 DO_LINK_SERIALIZATION=1;;
7014 [[1-9]] | [[1-9]][[0-9]] | [[1-9]][[0-9]][[0-9]])
7015 DO_LINK_SERIALIZATION=$do_link_serialization;;
7017 DO_LINK_SERIALIZATION=;;
7019 AC_MSG_ERROR(bad value ${do_link_serialization} given for --enable-link-serialization) ;;
7021 AC_SUBST(DO_LINK_SERIALIZATION)
7027 # Make empty files to contain the specs and options for each language.
7028 # Then add #include lines to for a compiler that has specs and/or options.
7034 # These (without "all_") are set in each config-lang.in.
7035 # `language' must be a single word so is spelled singularly.
7038 all_outputs='Makefile'
7039 # List of language configure and makefile fragments.
7040 all_lang_configurefrags=
7042 # Additional files for gengtype
7043 all_gtfiles="$target_gtfiles"
7045 # These are the languages that are set in --enable-languages,
7046 # and are available in the GCC tree.
7047 all_selected_languages=
7049 # Add the language fragments.
7050 # Languages are added via two mechanisms. Some information must be
7051 # recorded in makefile variables, these are defined in config-lang.in.
7052 # We accumulate them and plug them into the main Makefile.
7053 # The other mechanism is a set of hooks for each of the main targets
7054 # like `clean', `install', etc.
7056 language_hooks="Make-hooks"
7058 for lang in ${srcdir}/*/config-lang.in
7061 test "$lang" = "${srcdir}/*/config-lang.in" && continue
7063 lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^ ]*\).*$,\1,p' $lang`
7064 if test "x$lang_alias" = x
7066 echo "$lang doesn't set \$language." 1>&2
7069 subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
7070 subdirs="$subdirs $subdir"
7072 # $gcc_subdir is where the gcc integration files are to be found
7073 # for a language, both for internal compiler purposes (compiler
7074 # sources implementing front-end to GCC tree converters), and for
7075 # build infrastructure purposes (Make-lang.in, etc.)
7077 # This will be <subdir> (relative to $srcdir) if a line like
7078 # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
7079 # is found in <langdir>/config-lang.in, and will remain <langdir>
7082 # Except for the language alias (fetched above), the regular
7083 # "config-lang.in" contents are always retrieved from $gcc_subdir,
7084 # so a <langdir>/config-lang.in setting gcc_subdir typically sets
7085 # only this and the language alias.
7087 gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^ ]*\).*$,\1,p' $lang`
7088 if [ "$gcc_subdir" = "" ]; then
7089 gcc_subdir="$subdir"
7092 case ",$enable_languages," in
7094 all_selected_languages="$all_selected_languages $lang_alias"
7095 if test -f $srcdir/$gcc_subdir/lang-specs.h; then
7096 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
7108 . ${srcdir}/$gcc_subdir/config-lang.in
7109 if test "x$language" = x
7111 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
7116 case ",$enable_languages," in
7119 for i in $subdir_requires; do
7120 test -f "${srcdir}/$i/config-lang.in" && continue
7128 all_lang_configurefrags="$all_lang_configurefrags \$(srcdir)/$gcc_subdir/config-lang.in"
7129 if test "x$language" = xc && test -n "$all_lang_makefrags"; then
7130 # Put c/Make-lang.in fragment first to match serialization languages order.
7131 all_lang_makefrags="\$(srcdir)/$gcc_subdir/Make-lang.in $all_lang_makefrags"
7133 all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
7135 if test -f $srcdir/$gcc_subdir/lang.opt; then
7136 lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
7137 all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
7139 if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
7140 lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
7142 all_languages="$all_languages $language"
7143 all_compilers="$all_compilers $compilers"
7144 all_outputs="$all_outputs $outputs"
7145 all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
7146 case ",$enable_languages," in
7148 AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
7150 AC_SUBST(enable_lto)
7157 for language in $all_selected_languages
7159 check_languages="$check_languages check-$language"
7163 for language in $all_selected_languages
7165 selftest_languages="$selftest_languages selftest-$language"
7168 # We link each language in with a set of hooks, reached indirectly via
7169 # lang.${target}. Only do so for selected languages.
7173 target_list="all.cross start.encap rest.encap tags \
7174 install-common install-man install-info install-dvi install-pdf \
7175 install-html dvi pdf html uninstall info man srcextra srcman srcinfo \
7176 mostlyclean clean distclean maintainer-clean install-plugin"
7178 for t in $target_list
7181 for lang in $all_selected_languages
7185 echo "lang.$t: $x" >> Make-hooks
7188 echo "ifeq (\$(DO_LINK_SERIALIZATION),)" >> Make-hooks
7189 echo "SERIAL_LIST =" >> Make-hooks
7190 echo else >> Make-hooks
7194 serialization_languages=c
7195 for lang in $all_selected_languages
7197 test $lang = c && continue
7198 if test $lang = lto; then
7199 serialization_languages="$serialization_languages lto1 lto2"
7201 serialization_languages="$serialization_languages $lang"
7204 for lang in $serialization_languages
7206 test $lang = c && continue
7207 lang_cnt=`expr $lang_cnt + 1`
7208 lang_list=" $prev$lang_list"
7211 echo "SERIAL_LIST = \$(wordlist \$(DO_LINK_SERIALIZATION),$lang_cnt,$lang_list)" >> Make-hooks
7212 echo endif >> Make-hooks
7213 echo "SERIAL_COUNT = `expr $lang_cnt + 1`" >> Make-hooks
7214 echo "INDEX.c = 0" >> Make-hooks
7216 for lang in $serialization_languages
7218 test $lang = c && continue
7219 echo "$lang.prev = \$(if \$(word $lang_cnt,\$(SERIAL_LIST)),\$(\$(word $lang_cnt,\$(SERIAL_LIST)).serial))" >> Make-hooks
7220 echo "INDEX.$lang = $lang_idx" >> Make-hooks
7221 lang_cnt=`expr $lang_cnt - 1`
7222 lang_idx=`expr $lang_idx + 1`
7226 # Option include files
7229 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
7230 option_includes="option-includes.mk"
7231 AC_SUBST_FILE(option_includes)
7239 echo "dir ." > .gdbinit
7240 echo "dir ${srcdir}" >> .gdbinit
7241 if test x$gdb_needs_out_file_path = xyes
7243 echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
7245 if test "x$subdirs" != x; then
7248 echo "dir ${srcdir}/$s" >> .gdbinit
7251 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
7252 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
7254 # Put a breakpoint on __asan_report_error to help with debugging buffer
7257 *-fsanitize=address*)
7258 echo "source ${srcdir}/gdbasan.in" >> .gdbinit
7262 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
7263 AC_SUBST(gcc_tooldir)
7266 # Find a directory in which to install a shared libgcc.
7268 AC_ARG_ENABLE(version-specific-runtime-libs,
7269 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
7270 [specify that runtime libraries should be
7271 installed in a compiler-specific directory])])
7273 # Substitute configuration variables
7276 AC_SUBST(all_compilers)
7277 AC_SUBST(all_gtfiles)
7278 AC_SUBST(all_lang_configurefrags)
7279 AC_SUBST(all_lang_makefrags)
7280 AC_SUBST(all_languages)
7281 AC_SUBST(all_selected_languages)
7282 AC_SUBST(build_exeext)
7283 AC_SUBST(build_install_headers_dir)
7284 AC_SUBST(build_xm_file_list)
7285 AC_SUBST(build_xm_include_list)
7286 AC_SUBST(build_xm_defines)
7287 AC_SUBST(build_file_translate)
7288 AC_SUBST(check_languages)
7289 AC_SUBST(selftest_languages)
7290 AC_SUBST(cpp_install_dir)
7291 AC_SUBST(xmake_file)
7292 AC_SUBST(tmake_file)
7293 AC_SUBST(TM_ENDIAN_CONFIG)
7294 AC_SUBST(TM_MULTILIB_CONFIG)
7295 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
7296 AC_SUBST(extra_gcc_objs)
7297 AC_SUBST(user_headers_inc_next_pre)
7298 AC_SUBST(user_headers_inc_next_post)
7299 AC_SUBST(extra_headers_list)
7300 AC_SUBST(extra_objs)
7301 AC_SUBST(extra_programs)
7302 AC_SUBST(float_h_file)
7303 AC_SUBST(gcc_config_arguments)
7304 AC_SUBST(gcc_gxx_include_dir)
7305 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
7306 AC_SUBST(gcc_gxx_libcxx_include_dir)
7307 AC_SUBST(gcc_gxx_libcxx_include_dir_add_sysroot)
7308 AC_SUBST(host_exeext)
7309 AC_SUBST(host_xm_file_list)
7310 AC_SUBST(host_xm_include_list)
7311 AC_SUBST(host_xm_defines)
7312 AC_SUBST(out_host_hook_obj)
7314 AC_SUBST(lang_opt_files)
7315 AC_SUBST(lang_specs_files)
7316 AC_SUBST(lang_tree_files)
7317 AC_SUBST(local_prefix)
7319 AC_SUBST(objc_boehm_gc)
7321 AC_SUBST(out_object_file)
7322 AC_SUBST(common_out_file)
7323 AC_SUBST(common_out_object_file)
7324 AC_SUBST(tm_file_list)
7325 AC_SUBST(tm_include_list)
7326 AC_SUBST(tm_defines)
7327 AC_SUBST(tm_p_file_list)
7328 AC_SUBST(tm_p_include_list)
7329 AC_SUBST(tm_d_file_list)
7330 AC_SUBST(tm_d_include_list)
7331 AC_SUBST(xm_file_list)
7332 AC_SUBST(xm_include_list)
7333 AC_SUBST(xm_defines)
7334 AC_SUBST(use_gcc_stdint)
7335 AC_SUBST(c_target_objs)
7336 AC_SUBST(cxx_target_objs)
7337 AC_SUBST(fortran_target_objs)
7338 AC_SUBST(d_target_objs)
7339 AC_SUBST(target_cpu_default)
7341 AC_SUBST_FILE(language_hooks)
7344 if test x${build} = x${host} ; then
7345 if test x${host} = x${target} ; then
7346 echo "Links are now set up to build a native compiler for ${target}." 1>&2
7348 echo "Links are now set up to build a cross-compiler" 1>&2
7349 echo " from ${host} to ${target}." 1>&2
7352 if test x${host} = x${target} ; then
7353 echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
7354 echo " for ${target}." 1>&2
7356 echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
7357 echo " from ${host} to ${target}." 1>&2
7361 AC_ARG_VAR(GMPLIBS,[How to link GMP])
7362 AC_ARG_VAR(GMPINC,[How to find GMP include files])
7364 AC_ARG_VAR(ISLLIBS,[How to link isl])
7365 AC_ARG_VAR(ISLINC,[How to find isl include files])
7366 if test "x${ISLLIBS}" != "x" ; then
7367 AC_DEFINE(HAVE_isl, 1, [Define if isl is in use.])
7371 AC_SUBST(pluginlibs)
7372 AC_SUBST(enable_plugin)
7373 if test x"$enable_plugin" = x"yes"; then
7374 AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
7378 # Enable --enable-host-shared
7379 AC_ARG_ENABLE(host-shared,
7380 [AS_HELP_STRING([--enable-host-shared],
7381 [build host code as shared libraries])],
7382 [PICFLAG=-fPIC], [PICFLAG=])
7383 AC_SUBST(enable_host_shared)
7387 AC_ARG_ENABLE(libquadmath-support,
7388 [AS_HELP_STRING([--disable-libquadmath-support],
7389 [disable libquadmath support for Fortran])],
7390 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
7391 ENABLE_LIBQUADMATH_SUPPORT=yes)
7392 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
7393 AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
7394 [Define to 1 to enable libquadmath support])
7398 # Specify what hash style to use by default.
7399 AC_ARG_WITH([linker-hash-style],
7400 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
7401 [specify the linker hash style])],
7402 [case x"$withval" in
7404 LINKER_HASH_STYLE=sysv
7407 LINKER_HASH_STYLE=gnu
7410 LINKER_HASH_STYLE=both
7413 AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
7416 [LINKER_HASH_STYLE=''])
7417 if test x"${LINKER_HASH_STYLE}" != x; then
7418 AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
7419 [The linker hash style])
7422 # Specify what should be the default of -fdiagnostics-color option.
7423 AC_ARG_WITH([diagnostics-color],
7424 [AC_HELP_STRING([--with-diagnostics-color={never,auto,auto-if-env,always}],
7425 [specify the default of -fdiagnostics-color option
7426 auto-if-env stands for -fdiagnostics-color=auto if
7427 GCC_COLOR environment variable is present and
7428 -fdiagnostics-color=never otherwise])],
7429 [case x"$withval" in
7431 DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_NO
7434 DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO
7437 DIAGNOSTICS_COLOR_DEFAULT=-1
7440 DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_YES
7443 AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-color])
7446 [DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO])
7447 AC_DEFINE_UNQUOTED(DIAGNOSTICS_COLOR_DEFAULT, $DIAGNOSTICS_COLOR_DEFAULT,
7448 [The default for -fdiagnostics-color option])
7450 # Specify what should be the default of -fdiagnostics-urls option.
7451 AC_ARG_WITH([diagnostics-urls],
7452 [AC_HELP_STRING([--with-diagnostics-urls={never,auto,auto-if-env,always}],
7453 [specify the default of -fdiagnostics-urls option
7454 auto-if-env stands for -fdiagnostics-urls=auto if
7455 GCC_URLS or TERM_URLS environment variable is present and
7456 -fdiagnostics-urls=never otherwise])],
7457 [case x"$withval" in
7459 DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_NO
7462 DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_AUTO
7465 DIAGNOSTICS_URLS_DEFAULT=-1
7468 DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_YES
7471 AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-urls])
7474 [DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_AUTO])
7475 AC_DEFINE_UNQUOTED(DIAGNOSTICS_URLS_DEFAULT, $DIAGNOSTICS_URLS_DEFAULT,
7476 [The default for -fdiagnostics-urls option])
7478 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
7479 # of jit/jit-playback.cc.
7480 gcc_driver_version=`eval "${get_gcc_base_ver} $srcdir/BASE-VER"`
7481 echo "gcc_driver_version: ${gcc_driver_version}"
7482 cat > gcc-driver-name.h <<EOF
7483 #define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_driver_version}${exeext}"
7486 # Check whether --enable-default-pie was given.
7487 AC_ARG_ENABLE(default-pie,
7488 [AS_HELP_STRING([--enable-default-pie],
7489 [enable Position Independent Executable as default])],
7490 enable_default_pie=$enableval,
7491 enable_default_pie=no)
7492 if test x$enable_default_pie = xyes ; then
7493 AC_DEFINE(ENABLE_DEFAULT_PIE, 1,
7494 [Define if your target supports default PIE and it is enabled.])
7496 AC_SUBST([enable_default_pie])
7498 # Check if -fno-PIE works.
7499 AC_CACHE_CHECK([for -fno-PIE option],
7501 [saved_CXXFLAGS="$CXXFLAGS"
7502 CXXFLAGS="$CXXFLAGS -fno-PIE"
7503 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return 0;}])],
7504 [gcc_cv_c_no_fpie=yes],
7505 [gcc_cv_c_no_fpie=no])
7506 CXXFLAGS="$saved_CXXFLAGS"])
7507 if test "$gcc_cv_c_no_fpie" = "yes"; then
7508 NO_PIE_CFLAGS="-fno-PIE"
7510 AC_SUBST([NO_PIE_CFLAGS])
7512 # Check if -no-pie works.
7513 AC_CACHE_CHECK([for -no-pie option],
7515 [saved_LDFLAGS="$LDFLAGS"
7516 LDFLAGS="$LDFLAGS -no-pie"
7517 AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void) {return 0;}])],
7518 [gcc_cv_no_pie=yes],
7520 LDFLAGS="$saved_LDFLAGS"])
7521 if test "$gcc_cv_no_pie" = "yes"; then
7522 NO_PIE_FLAG="-no-pie"
7524 AC_SUBST([NO_PIE_FLAG])
7526 # Enable Intel CET on Intel CET enabled host if jit is enabled.
7527 GCC_CET_HOST_FLAGS(CET_HOST_FLAGS)
7528 case x$enable_languages in
7535 AC_SUBST(CET_HOST_FLAGS)
7537 # Check linker supports '-z bndplt'
7538 ld_bndplt_support=no
7539 AC_MSG_CHECKING(linker -z bndplt option)
7540 if test x"$ld_is_gold" = xno; then
7541 if test $in_tree_ld = yes ; then
7542 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
7543 ld_bndplt_support=yes
7545 elif test x$gcc_cv_ld != x; then
7546 # Check if linker supports -a bndplt option
7547 if $gcc_cv_ld --help 2>&1 | grep -- '-z bndplt' > /dev/null; then
7548 ld_bndplt_support=yes
7552 if test x"$ld_bndplt_support" = xyes; then
7553 AC_DEFINE(HAVE_LD_BNDPLT_SUPPORT, 1,
7554 [Define if your linker supports -z bndplt])
7556 AC_MSG_RESULT($ld_bndplt_support)
7558 # Check linker supports '--push-state'/'--pop-state'
7559 ld_pushpopstate_support=no
7560 AC_MSG_CHECKING(linker --push-state/--pop-state options)
7561 if test x"$ld_is_gold" = xno; then
7562 if test $in_tree_ld = yes ; then
7563 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
7564 ld_pushpopstate_support=yes
7566 elif test x$gcc_cv_ld != x; then
7567 # Check if linker supports --push-state/--pop-state options
7568 if $gcc_cv_ld --help 2>&1 | grep -- '--push-state' > /dev/null; then
7569 ld_pushpopstate_support=yes
7573 if test x"$ld_pushpopstate_support" = xyes; then
7574 AC_DEFINE(HAVE_LD_PUSHPOPSTATE_SUPPORT, 1,
7575 [Define if your linker supports --push-state/--pop-state])
7577 AC_MSG_RESULT($ld_pushpopstate_support)
7579 # On s390, float_t has historically been statically defined as double for no
7580 # good reason. To comply with the C standard in the light of this definition,
7581 # gcc has evaluated float expressions in double precision when in
7582 # standards-compatible mode or when given -fexcess-precision=standard. To enable
7583 # a smooth transition towards the new model used by most architectures, where
7584 # gcc describes its behavior via the macro __FLT_EVAL_METHOD__ and glibc derives
7585 # float_t from that, this behavior can be configured with
7586 # --enable-s390-excess-float-precision. When given as enabled, that flag selects
7587 # the old model. When omitted, native builds and cross compiles that have target
7588 # libc headers will detect whether libc clamps float_t to double and in that
7589 # case maintain the old model. Otherwise, they will default to the new model.
7590 AC_ARG_ENABLE(s390-excess-float-precision,
7591 [AS_HELP_STRING([--enable-s390-excess-float-precision],
7592 [on s390 targets, evaluate float with double precision
7593 when in standards-conforming mode])],
7594 [],[enable_s390_excess_float_precision=auto])
7598 if test x"$enable_s390_excess_float_precision" = xauto; then
7599 # Can we autodetect the behavior of the target libc?
7600 if test "$target" = "$host" -a "$host" = "$build"; then
7601 enable_s390_excess_float_precision=autodetect
7602 elif test "x$with_headers" != xno; then
7603 # cross build. are target headers available?
7604 # carefully coerce the build-system compiler to use target headers
7605 saved_CXXFLAGS="$CXXFLAGS"
7606 fixed_XGCC_FLAGS_FOR_TARGET=`echo "$XGCC_FLAGS_FOR_TARGET" | sed 's/-B/-idirafter/g'`
7607 CROSS_TEST_CXXFLAGS="-nostdinc $fixed_XGCC_FLAGS_FOR_TARGET"
7608 CXXFLAGS="$CROSS_TEST_CXXFLAGS"
7609 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
7611 ]])], [enable_s390_excess_float_precision=autodetect], [])
7612 CXXFLAGS="$saved_CXXFLAGS"
7615 if test x"$enable_s390_excess_float_precision" = xautodetect; then
7616 saved_CXXFLAGS="$CXXFLAGS"
7617 if ! test "$target" = "$host" -a "$host" = "$build"; then
7618 CXXFLAGS="$CROSS_TEST_CXXFLAGS"
7619 unset CROSS_TEST_CXXFLAGS
7621 AC_CACHE_CHECK([for glibc clamping float_t to double],
7622 gcc_cv_float_t_clamped_to_double, [
7623 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
7624 #define __FLT_EVAL_METHOD__ 0
7626 int dummy[sizeof(float_t) == sizeof(double) ? 1 : -1];
7628 [gcc_cv_float_t_clamped_to_double=yes],
7629 [gcc_cv_float_t_clamped_to_double=no])])
7630 CXXFLAGS="$saved_CXXFLAGS"
7631 enable_s390_excess_float_precision="$gcc_cv_float_t_clamped_to_double"
7633 # no way to detect behavior of target libc, default to new model
7634 enable_s390_excess_float_precision=no
7638 GCC_TARGET_TEMPLATE(ENABLE_S390_EXCESS_FLOAT_PRECISION)
7639 if test x"$enable_s390_excess_float_precision" = xyes; then
7640 AC_DEFINE(ENABLE_S390_EXCESS_FLOAT_PRECISION, 1,
7641 [Define to enable evaluating float expressions with double precision in
7642 standards-compatible mode on s390 targets.])
7647 # Configure the subdirectories
7648 # AC_CONFIG_SUBDIRS($subdirs)
7650 # Create the Makefile
7651 # and configure language subdirectories
7652 AC_CONFIG_FILES($all_outputs)
7654 AC_CONFIG_COMMANDS([default],
7656 case ${CONFIG_HEADERS} in
7657 *auto-host.h:config.in*)
7660 # Make sure all the subdirs exist.
7661 for d in $subdirs doc build common c-family
7663 test -d $d || mkdir $d
7666 [subdirs='$subdirs'])