2 # Process this file with autoconf to generate a configuration script.
4 # Copyright (C) 1997-2016 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 # --------------------------------
28 AC_CONFIG_SRCDIR(tree.c)
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 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
209 if test x${gcc_gxx_include_dir} = x; then
210 if test x${enable_version_specific_runtime_libs} = xyes; then
211 gcc_gxx_include_dir='${libsubdir}/include/c++'
213 libstdcxx_incdir='include/c++/$(version)'
214 if test x$host != x$target; then
215 libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
217 gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
221 gcc_gxx_include_dir_add_sysroot=0
222 if test "${with_sysroot+set}" = set; then
223 gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
224 if test "${gcc_gxx_without_sysroot}"; then
225 if test x${with_sysroot} != x/; then
226 gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
228 gcc_gxx_include_dir_add_sysroot=1
232 AC_ARG_WITH(cpp_install_dir,
233 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
234 [install the user visible C preprocessor in DIR
235 (relative to PREFIX) as well as PREFIX/bin])],
236 [if test x$withval = xyes; then
237 AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
238 elif test x$withval != xno; then
239 cpp_install_dir=$withval
242 # We would like to our source tree to be readonly. However when releases or
243 # pre-releases are generated, the flex/bison generated files as well as the
244 # various formats of manuals need to be included along with the rest of the
245 # sources. Therefore we have --enable-generated-files-in-srcdir to do
248 AC_MSG_CHECKING([whether to place generated files in the source directory])
249 dnl generated-files-in-srcdir is disabled by default
250 AC_ARG_ENABLE(generated-files-in-srcdir,
251 [AS_HELP_STRING([--enable-generated-files-in-srcdir],
252 [put copies of generated files in source dir
253 intended for creating source tarballs for users
254 without texinfo bison or flex])],
255 generated_files_in_srcdir=$enableval,
256 generated_files_in_srcdir=no)
258 AC_MSG_RESULT($generated_files_in_srcdir)
260 if test "$generated_files_in_srcdir" = "yes"; then
267 # -------------------
268 # Find default linker
269 # -------------------
273 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
274 gnu_ld_flag="$with_gnu_ld",
277 # With pre-defined ld
279 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
280 DEFAULT_LINKER="$with_ld")
281 if test x"${DEFAULT_LINKER+set}" = x"set"; then
282 if test ! -x "$DEFAULT_LINKER"; then
283 AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
284 elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
287 AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
288 [Define to enable the use of a default linker.])
291 AC_MSG_CHECKING([whether a default linker was specified])
292 if test x"${DEFAULT_LINKER+set}" = x"set"; then
293 if test x"$gnu_ld_flag" = x"no"; then
294 AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
296 AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
302 # With demangler in GNU ld
303 AC_ARG_WITH(demangler-in-ld,
304 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
305 demangler_in_ld="$with_demangler_in_ld",
308 # ----------------------
309 # Find default assembler
310 # ----------------------
314 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
315 gas_flag="$with_gnu_as",
319 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
320 DEFAULT_ASSEMBLER="$with_as")
321 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
322 if test ! -x "$DEFAULT_ASSEMBLER"; then
323 AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
324 elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
327 AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
328 [Define to enable the use of a default assembler.])
331 AC_MSG_CHECKING([whether a default assembler was specified])
332 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
333 if test x"$gas_flag" = x"no"; then
334 AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
336 AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
346 # If a non-executable a.out is present (e.g. created by GNU as above even if
347 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
348 # file, even when creating an executable, so an execution test fails.
349 # Remove possible default executable files to avoid this.
351 # FIXME: This really belongs into AC_PROG_CC and can be removed once
352 # Autoconf includes it.
353 rm -f a.out a.exe b.out
355 # Find the native compiler
358 ACX_PROG_GNAT([-I"$srcdir"/ada])
360 # Do configure tests with the C++ compiler, since that's what we build with.
363 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
364 # optimizations to be activated explicitly by the toplevel.
367 *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[ ]]//" -e "s/-O[[gs]][[ ]]//" -e "s/-O[[0-9]]*[[ ]]//" `
368 CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[ ]]//" -e "s/-O[[gs]][[ ]]//" -e "s/-O[[0-9]]*[[ ]]//" ` ;;
373 # Determine PICFLAG for target gnatlib.
374 GCC_PICFLAG_FOR_TARGET
375 AC_SUBST(PICFLAG_FOR_TARGET)
377 # -------------------------
378 # Check C compiler features
379 # -------------------------
381 AC_USE_SYSTEM_EXTENSIONS
387 # sizeof(char) is 1 by definition.
388 AC_CHECK_SIZEOF(void *)
389 AC_CHECK_SIZEOF(short)
391 AC_CHECK_SIZEOF(long)
392 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
394 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
395 AC_MSG_ERROR([uint64_t or int64_t not found])
398 # check what underlying integer type int64_t uses
399 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
400 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
404 template <typename T> struct X { };
406 struct X<long> { typedef long t; };
407 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
408 if test "$ac_cv_int64_t_type" = "long"; then
409 AC_DEFINE(INT64_T_IS_LONG, 1,
410 [Define if int64_t uses long as underlying type.])
412 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
416 template <typename T> struct X { };
418 struct X<long long> { typedef long long t; };
419 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
422 AC_CACHE_CHECK(for std::swap in <utility>, ac_cv_std_swap_in_utility, [
423 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
425 ]], [[int a, b; std::swap(a,b);]])],[ac_cv_std_swap_in_utility=yes],[ac_cv_std_swap_in_utility=no])])
426 if test $ac_cv_std_swap_in_utility = yes; then
427 AC_DEFINE(HAVE_SWAP_IN_UTILITY, 1,
428 [Define if <utility> defines std::swap.])
431 # Check whether compiler is affected by placement new aliasing bug (PR 29286).
432 # If the host compiler is affected by the bug, and we build with optimization
433 # enabled (which happens e.g. when cross-compiling), the pool allocator may
434 # get miscompiled. Use -fno-strict-aliasing to work around this problem.
435 # Since there is no reliable feature check for the presence of this bug,
436 # we simply use a GCC version number check. (This should never trigger for
437 # stages 2 or 3 of a native bootstrap.)
439 if test "$GCC" = yes; then
440 saved_CXXFLAGS="$CXXFLAGS"
442 # The following test compilation will succeed if and only if $CXX accepts
443 # -fno-strict-aliasing *and* is older than GCC 4.3.
444 CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
445 AC_MSG_CHECKING([whether $CXX is affected by placement new aliasing bug])
447 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
448 #error compiler not affected by placement new aliasing bug
451 [AC_MSG_RESULT([yes]); aliasing_flags='-fno-strict-aliasing'],
452 [AC_MSG_RESULT([no])])
454 CXXFLAGS="$saved_CXXFLAGS"
456 AC_SUBST(aliasing_flags)
460 # ---------------------
461 # Warnings and checking
462 # ---------------------
464 # Check $CC warning features (if it's GCC).
465 # We want to use -pedantic, but we don't want warnings about
469 # * C++11 narrowing conversions in { }
470 # So, we only use -pedantic if we can disable those warnings.
472 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
473 AC_ARG_ENABLE(build-format-warnings,
474 AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
475 [],[enable_build_format_warnings=yes])
476 AS_IF([test $enable_build_format_warnings = no],
477 [wf_opt=-Wno-format],[wf_opt=])
478 ACX_PROG_CXX_WARNING_OPTS(
479 m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings ],
480 [-Wcast-qual $wf_opt])), [loose_warn])
481 ACX_PROG_CC_WARNING_OPTS(
482 m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
484 ACX_PROG_CXX_WARNING_OPTS(
485 m4_quote(m4_do([-Wmissing-format-attribute ],
486 [-Woverloaded-virtual])), [strict_warn])
487 ACX_PROG_CC_WARNING_OPTS(
488 m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
489 ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(
490 m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
491 [-Wno-overlength-strings])), [strict_warn])
492 ACX_PROG_CXX_WARNINGS_ARE_ERRORS([manual], [strict_warn])
494 # The above macros do nothing if the compiler is not GCC. However, the
495 # Makefile has more goo to add other flags, so these variables are used
496 # to enable warnings only for GCC.
499 if test "x$GCC" = "xyes"; then
500 warn_cflags='$(GCC_WARN_CFLAGS)'
501 warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
503 AC_SUBST(warn_cflags)
504 AC_SUBST(warn_cxxflags)
506 # Disable exceptions and RTTI if building with g++
507 ACX_PROG_CC_WARNING_OPTS(
508 m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
511 # Enable expensive internal checks
513 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
517 AC_ARG_ENABLE(checking,
518 [AS_HELP_STRING([[--enable-checking[=LIST]]],
519 [enable expensive run-time checks. With LIST,
520 enable only specific categories of checks.
521 Categories are: yes,no,all,none,release.
522 Flags are: assert,df,extra,fold,gc,gcac,gimple,misc,
523 rtlflag,rtl,runtime,tree,valgrind,types])],
524 [ac_checking_flags="${enableval}"],[
525 # Determine the default checks.
526 if test x$is_release = x ; then
527 ac_checking_flags=yes,extra
529 ac_checking_flags=release
531 IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="$IFS,"
532 for check in release $ac_checking_flags
535 # these set all the flags to specific states
536 yes) ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
537 ac_fold_checking= ; ac_gc_checking=1 ; ac_extra_checking= ;
538 ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
539 ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
540 ac_tree_checking=1 ; ac_valgrind_checking= ;
541 ac_types_checking=1 ;;
542 no|none) ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
543 ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
544 ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
545 ac_rtlflag_checking= ; ac_runtime_checking= ;
546 ac_tree_checking= ; ac_valgrind_checking= ;
547 ac_types_checking= ;;
548 all) ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
549 ac_fold_checking=1 ; ac_gc_checking=1 ; ac_extra_checking=1 ;
550 ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
551 ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
552 ac_tree_checking=1 ; ac_valgrind_checking= ;
553 ac_types_checking=1 ;;
554 release) ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
555 ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
556 ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
557 ac_rtlflag_checking= ; ac_runtime_checking=1 ;
558 ac_tree_checking= ; ac_valgrind_checking= ;
559 ac_types_checking= ;;
560 # these enable particular checks
561 assert) ac_assert_checking=1 ;;
562 df) ac_df_checking=1 ;;
563 extra) ac_extra_checking=1 ;;
564 fold) ac_fold_checking=1 ;;
565 gc) ac_gc_checking=1 ;;
566 gcac) ac_gc_always_collect=1 ;;
567 gimple) ac_gimple_checking=1 ;;
568 misc) ac_checking=1 ;;
569 rtl) ac_rtl_checking=1 ;;
570 rtlflag) ac_rtlflag_checking=1 ;;
571 runtime) ac_runtime_checking=1 ;;
572 tree) ac_tree_checking=1 ;;
573 types) ac_types_checking=1 ;;
574 valgrind) ac_valgrind_checking=1 ;;
575 *) AC_MSG_ERROR(unknown check category $check) ;;
581 if test x$ac_checking != x ; then
582 AC_DEFINE(CHECKING_P, 1,
583 [Define to 0/1 if you want more run-time sanity checks. This one gets a grab
584 bag of miscellaneous but relatively cheap checks.])
585 nocommon_flag=-fno-common
587 AC_DEFINE(CHECKING_P, 0)
589 AC_SUBST(nocommon_flag)
590 if test x$ac_extra_checking != x ; then
591 AC_DEFINE(ENABLE_EXTRA_CHECKING, 1,
592 [Define to 0/1 if you want extra run-time checking that might affect code
595 AC_DEFINE(ENABLE_EXTRA_CHECKING, 0)
597 if test x$ac_df_checking != x ; then
598 AC_DEFINE(ENABLE_DF_CHECKING, 1,
599 [Define if you want more run-time sanity checks for dataflow.])
601 if test x$ac_assert_checking != x ; then
602 AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
603 [Define if you want assertions enabled. This is a cheap check.])
605 if test x$ac_gimple_checking != x ; then
606 AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
607 [Define if you want operations on GIMPLE (the basic data structure of
608 the high-level optimizers) to be checked for dynamic type safety at
609 runtime. This is moderately expensive.])
611 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
612 if test x$ac_runtime_checking != x ; then
613 AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
614 [Define if you want runtime assertions enabled. This is a cheap check.])
616 if test x$ac_tree_checking != x ; then
617 AC_DEFINE(ENABLE_TREE_CHECKING, 1,
618 [Define if you want all operations on trees (the basic data
619 structure of the front ends) to be checked for dynamic type safety
620 at runtime. This is moderately expensive.
624 if test x$ac_types_checking != x ; then
625 AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
626 [Define if you want all gimple types to be verified after gimplifiation.
630 AC_SUBST(TREECHECKING)
631 if test x$ac_rtl_checking != x ; then
632 AC_DEFINE(ENABLE_RTL_CHECKING, 1,
633 [Define if you want all operations on RTL (the basic data structure
634 of the optimizer and back end) to be checked for dynamic type safety
635 at runtime. This is quite expensive.])
637 if test x$ac_rtlflag_checking != x ; then
638 AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
639 [Define if you want RTL flag accesses to be checked against the RTL
640 codes that are supported for each access macro. This is relatively
643 if test x$ac_gc_checking != x ; then
644 AC_DEFINE(ENABLE_GC_CHECKING, 1,
645 [Define if you want the garbage collector to do object poisoning and
646 other memory allocation checks. This is quite expensive.])
648 if test x$ac_gc_always_collect != x ; then
649 AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
650 [Define if you want the garbage collector to operate in maximally
651 paranoid mode, validating the entire heap and collecting garbage at
652 every opportunity. This is extremely expensive.])
654 if test x$ac_fold_checking != x ; then
655 AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
656 [Define if you want fold checked that it never destructs its argument.
657 This is quite expensive.])
659 valgrind_path_defines=
662 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
663 dnl # an if statement. This was the source of very frustrating bugs
664 dnl # in converting to autoconf 2.5x!
665 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
667 # It is certainly possible that there's valgrind but no valgrind.h.
668 # GCC relies on making annotations so we must have both.
669 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
670 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
671 [[#include <valgrind/memcheck.h>
672 #ifndef VALGRIND_DISCARD
673 #error VALGRIND_DISCARD not defined
675 [gcc_cv_header_valgrind_memcheck_h=yes],
676 [gcc_cv_header_valgrind_memcheck_h=no])
677 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
678 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
679 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
680 [[#include <memcheck.h>
681 #ifndef VALGRIND_DISCARD
682 #error VALGRIND_DISCARD not defined
684 [gcc_cv_header_memcheck_h=yes],
685 [gcc_cv_header_memcheck_h=no])
686 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
687 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
688 AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
689 [Define if valgrind's valgrind/memcheck.h header is installed.])
691 if test $gcc_cv_header_memcheck_h = yes; then
692 AC_DEFINE(HAVE_MEMCHECK_H, 1,
693 [Define if valgrind's memcheck.h header is installed.])
696 if test x$ac_valgrind_checking != x ; then
697 AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
698 [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
699 if test "x$valgrind_path" = "x" \
700 || (test $have_valgrind_h = no \
701 && test $gcc_cv_header_memcheck_h = no \
702 && test $gcc_cv_header_valgrind_memcheck_h = no); then
703 AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
705 valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
706 valgrind_command="$valgrind_path -q"
707 AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
708 [Define if you want to run subprograms and generated programs
709 through valgrind (a memory checker). This is extremely expensive.])
711 AC_SUBST(valgrind_path_defines)
712 AC_SUBST(valgrind_command)
714 # Enable code coverage collection
715 AC_ARG_ENABLE(coverage,
716 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
717 [enable compiler's code coverage collection.
718 Use to measure compiler performance and locate
719 unused parts of the compiler. With LEVEL, specify
720 optimization. Values are opt, noopt,
722 [case "${enableval}" in
724 coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
727 coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
730 # a.k.a. --disable-coverage
734 AC_MSG_ERROR(unknown coverage setting $enableval)
738 AC_SUBST(coverage_flags)
740 AC_ARG_ENABLE(gather-detailed-mem-stats,
741 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
742 [enable detailed memory allocation stats gathering])], [],
743 [enable_gather_detailed_mem_stats=no])
744 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
745 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
746 [Define to enable detailed memory allocation stats gathering.])
748 AC_ARG_ENABLE(valgrind-annotations,
749 [AS_HELP_STRING([--enable-valgrind-annotations],
750 [enable valgrind runtime interaction])], [],
751 [enable_valgrind_annotations=no])
752 if test x$enable_valgrind_annotations != xno \
753 || test x$ac_valgrind_checking != x; then
754 if (test $have_valgrind_h = no \
755 && test $gcc_cv_header_memcheck_h = no \
756 && test $gcc_cv_header_valgrind_memcheck_h = no); then
757 AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
759 AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
760 [Define to get calls to the valgrind runtime enabled.])
763 # -------------------------------
764 # Miscenalleous configure options
765 # -------------------------------
769 [AS_HELP_STRING([--with-stabs],
770 [arrange to use stabs instead of host debug format])],
774 # Determine whether or not multilibs are enabled.
775 AC_ARG_ENABLE(multilib,
776 [AS_HELP_STRING([--enable-multilib],
777 [enable library support for multiple ABIs])],
778 [], [enable_multilib=yes])
779 AC_SUBST(enable_multilib)
781 # Determine whether or not multiarch is enabled.
782 AC_ARG_ENABLE(multiarch,
783 [AS_HELP_STRING([--enable-multiarch],
784 [enable support for multiarch paths])],
785 [case "${enableval}" in
786 yes|no|auto) enable_multiarch=$enableval;;
787 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
788 esac], [enable_multiarch=auto])
789 if test x${enable_multiarch} = xauto; then
790 if test x${with_native_system_header_dir} != x; then
791 ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
794 if test x$host != x$target && test "x$with_sysroot" = x; then
795 ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
799 AC_MSG_CHECKING(for multiarch configuration)
800 AC_SUBST(enable_multiarch)
801 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
803 # needed for setting the multiarch name for soft-float/hard-float ABIs
807 # Enable __cxa_atexit for C++.
808 AC_ARG_ENABLE(__cxa_atexit,
809 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
812 # Enable C extension for decimal float if target supports it.
813 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
815 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
816 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
817 [Define to 1 to enable decimal float extension to C.])
819 # Use default_decimal_float for dependency.
820 enable_decimal_float=$default_decimal_float
822 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
823 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
824 [Define to 1 to specify that we are using the BID decimal floating
825 point format instead of DPD])
827 # Enable C extension for fixed-point arithmetic.
828 AC_ARG_ENABLE(fixed-point,
829 [AS_HELP_STRING([--enable-fixed-point],
830 [enable fixed-point arithmetic extension to C])],
835 enable_fixed_point=yes
839 enable_fixed_point=yes
842 AC_MSG_WARN([fixed-point is not supported for this target, ignored])
843 enable_fixed_point=no
847 AC_SUBST(enable_fixed_point)
849 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
850 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
851 [Define to 1 to enable fixed-point arithmetic extension to C.])
854 # Pass with no value to take the default
855 # Pass with a value to specify a thread package
856 AC_ARG_ENABLE(threads,
857 [AS_HELP_STRING([[--enable-threads[=LIB]]],
858 [enable thread usage for target GCC,
859 using LIB thread package])],,
863 [AS_HELP_STRING([--enable-tls],
864 [enable or disable generation of tls code
865 overriding the assembler check for tls support])],
869 *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
870 Valid choices are 'yes' and 'no'.]) ;;
874 AC_ARG_ENABLE(vtable-verify,
875 [AS_HELP_STRING([--enable-vtable-verify],
876 [enable vtable verification feature])],,
877 [enable_vtable_verify=no])
878 vtable_verify=`if test x$enable_vtable_verify = xyes; then echo 1; else echo 0; fi`
879 AC_DEFINE_UNQUOTED(ENABLE_VTABLE_VERIFY, $vtable_verify,
880 [Define 0/1 if vtable verification feature is enabled.])
882 AC_ARG_ENABLE(objc-gc,
883 [AS_HELP_STRING([--enable-objc-gc],
884 [enable the use of Boehm's garbage collector with
885 the GNU Objective-C runtime])],
886 if test x$enable_objc_gc = xno; then
894 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
895 dwarf2="$with_dwarf2",
898 AC_ARG_ENABLE(shared,
899 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
901 case $enable_shared in
905 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
906 for pkg in $enableval; do
907 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
914 ], [enable_shared=yes])
915 AC_SUBST(enable_shared)
918 [AS_HELP_STRING([--with-specs=SPECS],
919 [add SPECS to driver command-line processing])],
920 [CONFIGURE_SPECS=$withval],
923 AC_SUBST(CONFIGURE_SPECS)
925 ACX_PKGVERSION([GCC])
926 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
928 # Sanity check enable_languages in case someone does not run the toplevel
929 # configure # script.
930 AC_ARG_ENABLE(languages,
931 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
932 [case ,${enable_languages}, in
934 # go safe -- we cannot be much sure without the toplevel
936 # analysis of which target libs are present and usable
940 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
945 enable_languages=c,${enable_languages}
948 [enable_languages=c])
950 if test x"$enable_as_accelerator_for" != x; then
951 AC_DEFINE(ACCEL_COMPILER, 1,
952 [Define if this compiler should be built as the offload target compiler.])
953 enable_as_accelerator=yes
956 # In this case we expect offload compiler to be built as native, so we
957 # need to rename the driver to avoid clashes with host's drivers.
958 program_transform_name="s&^&${target}-&" ;;
960 sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
961 program_transform_name=`echo $program_transform_name | sed $sedscript`
962 accel_dir_suffix=/accel/${target_noncanonical}
963 real_target_noncanonical=${enable_as_accelerator_for}
965 AC_SUBST(enable_as_accelerator)
966 AC_SUBST(real_target_noncanonical)
967 AC_SUBST(accel_dir_suffix)
969 for tgt in `echo $enable_offload_targets | sed 's/,/ /g'`; do
970 tgt=`echo $tgt | sed 's/=.*//'`
972 if echo "$tgt" | grep "^hsa" > /dev/null ; then
978 if test x"$offload_targets" = x; then
981 offload_targets="$offload_targets,$tgt"
984 AC_DEFINE_UNQUOTED(OFFLOAD_TARGETS, "$offload_targets",
985 [Define to offload targets, separated by commas.])
986 if test x"$enable_offloading" != x; then
987 AC_DEFINE(ENABLE_OFFLOADING, 1,
988 [Define this to enable support for offloading.])
990 AC_DEFINE(ENABLE_OFFLOADING, 0,
991 [Define this to enable support for offloading.])
994 if test x"$enable_hsa" = x1 ; then
995 AC_DEFINE(ENABLE_HSA, 1,
996 [Define this to enable support for generating HSAIL.])
999 AC_ARG_WITH(multilib-list,
1000 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, SH and x86-64 only)])],
1002 with_multilib_list=default)
1004 # -------------------------
1005 # Checks for other programs
1006 # -------------------------
1010 # Find some useful tools
1012 # We need awk to create options.c and options.h.
1013 # Bail out if it's missing.
1015 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
1022 AC_SUBST(ranlib_flags)
1026 # See if cmp has --ignore-initial.
1027 gcc_AC_PROG_CMP_IGNORE_INITIAL
1029 # See if we have the mktemp command.
1030 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
1032 # See if makeinfo has been installed and is modern enough
1033 # that we can use it.
1034 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
1035 [GNU texinfo.* \([0-9][0-9.]*\)],
1036 [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
1037 if test $gcc_cv_prog_makeinfo_modern = no; then
1039 *** Makeinfo is missing or too old.
1040 *** Info documentation will not be built.])
1045 AC_SUBST(BUILD_INFO)
1047 # Is pod2man recent enough to regenerate manpages?
1048 AC_MSG_CHECKING([for recent Pod::Man])
1049 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
1051 GENERATED_MANPAGES=generated-manpages
1056 AC_SUBST(GENERATED_MANPAGES)
1058 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
1061 dnl Don't use AC_PROG_LEX; we insist on flex.
1062 dnl LEXLIB is not useful in gcc.
1063 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
1066 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
1068 # Binutils are not build modules, unlike bison/flex/makeinfo. So we
1069 # check for build == host before using them.
1072 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
1073 && test -d ../binutils ; then
1074 NM='${objdir}/../binutils/nm-new'
1076 AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
1080 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
1081 && test -d ../binutils ; then
1082 AR='${objdir}/../binutils/ar'
1084 AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
1087 # The jit documentation looks better if built with sphinx, but can be
1088 # built with texinfo if sphinx is not available.
1089 # Set "doc_build_sys" to "sphinx" or "texinfo" accordingly.
1090 AC_CHECK_PROG(doc_build_sys, sphinx-build, sphinx, texinfo)
1092 # --------------------
1093 # Checks for C headers
1094 # --------------------
1096 # Need to reject headers which give warnings, so that the -Werror bootstrap
1097 # works later. *sigh* This needs to come before all header checks.
1104 AC_HEADER_TIOCGWINSZ
1105 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
1106 fcntl.h ftw.h unistd.h sys/file.h sys/time.h sys/mman.h \
1107 sys/resource.h sys/param.h sys/times.h sys/stat.h \
1108 direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
1110 # Check for thread headers.
1111 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
1112 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
1114 # These tests can't be done till we know if we have limits.h.
1118 # ----------------------
1119 # Checks for C++ headers
1120 # ----------------------
1122 dnl Autoconf will give an error in the configure script if there is no
1123 dnl C++ preprocessor. Hack to prevent that.
1124 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1126 m4_popdef([AC_MSG_ERROR])[]dnl
1128 AC_CHECK_HEADERS(unordered_map)
1129 AC_CHECK_HEADERS(tr1/unordered_map)
1130 AC_CHECK_HEADERS(ext/hash_map)
1133 # Dependency checking.
1137 AC_CONFIG_COMMANDS([gccdepdir],[
1138 ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1139 for lang in $subdirs c-family common
1141 ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1142 done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1144 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1151 # These libraries may be used by collect2.
1152 # We may need a special search path to get them linked.
1153 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1155 for libs in '' -lld -lmld \
1156 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1157 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1160 AC_TRY_LINK_FUNC(ldopen,
1161 [gcc_cv_collect2_libs="$libs"; break])
1164 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1165 case $gcc_cv_collect2_libs in
1167 *) COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1169 AC_SUBST(COLLECT2_LIBS)
1171 # When building Ada code on Alpha, we need exc_resume which is usually in
1172 # -lexc. So test for it.
1175 AC_SEARCH_LIBS(exc_resume, exc)
1178 AC_SUBST(GNAT_LIBEXC)
1180 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1183 AC_SEARCH_LIBS(kstat_open, kstat)
1184 EXTRA_GCC_LIBS="$LIBS"
1186 AC_SUBST(EXTRA_GCC_LIBS)
1188 # Some systems put ldexp and frexp in libm instead of libc; assume
1189 # they're both in the same place. jcf-dump needs them.
1192 AC_SEARCH_LIBS(ldexp, m)
1197 # Use <inttypes.h> only if it exists,
1198 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1200 AC_MSG_CHECKING(for inttypes.h)
1201 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1202 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1203 [[#define __STDC_FORMAT_MACROS
1204 #include <sys/types.h>
1205 #include <inttypes.h>]],
1210 [gcc_cv_header_inttypes_h=yes],
1211 [gcc_cv_header_inttypes_h=no])])
1212 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1213 if test $gcc_cv_header_inttypes_h = yes; then
1214 AC_DEFINE(HAVE_INTTYPES_H, 1,
1215 [Define if you have a working <inttypes.h> header file.])
1218 dnl Disabled until we have a complete test for buggy enum bitfields.
1219 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1221 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1222 ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1223 fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1224 fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1225 putchar_unlocked putc_unlocked)
1226 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoq \
1227 popen sysconf strsignal getrusage nl_langinfo \
1228 gettimeofday mbstowcs wcswidth mmap setlocale \
1229 gcc_UNLOCKED_FUNCS madvise)
1231 if test x$ac_cv_func_mbstowcs = xyes; then
1232 AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1233 [ AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1239 [gcc_cv_func_mbstowcs_works=yes],
1240 [gcc_cv_func_mbstowcs_works=no],
1241 [gcc_cv_func_mbstowcs_works=yes])])
1242 if test x$gcc_cv_func_mbstowcs_works = xyes; then
1243 AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1244 [Define this macro if mbstowcs does not crash when its
1245 first argument is NULL.])
1249 AC_CHECK_TYPE(ssize_t, int)
1250 AC_CHECK_TYPE(caddr_t, char *)
1252 GCC_AC_FUNC_MMAP_BLACKLIST
1256 # Under VMS, vfork works very differently than on Unix. The standard test
1257 # won't work, and it isn't easily adaptable. It makes more sense to
1259 ac_cv_func_vfork_works=yes
1266 # Until we have in-tree GNU iconv:
1268 if test -f "$LTLIBICONV"; then
1269 LIBICONV_DEP=$LTLIBICONV
1271 AC_SUBST(LIBICONV_DEP)
1277 # We will need to find libiberty.h and ansidecl.h
1278 saved_CFLAGS="$CFLAGS"
1279 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1280 saved_CXXFLAGS="$CXXFLAGS"
1281 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1283 # gcc_AC_CHECK_DECLS doesn't support overloaded functions, so use the
1284 # normal autoconf function for these. But force definition of
1285 # HAVE_DECL_BASENAME like gcc_AC_CHECK_DECLS does, to suppress the bizarre
1286 # basename handling in libiberty.h.
1287 AC_CHECK_DECLS([basename(const char*), strstr(const char*,const char*)], , ,[
1288 #undef HAVE_DECL_BASENAME
1289 #define HAVE_DECL_BASENAME 1
1290 #include "ansidecl.h"
1291 #include "system.h"])
1293 gcc_AC_CHECK_DECLS(getenv atol atoll asprintf sbrk abort atof getcwd getwd \
1294 madvise stpcpy strnlen strsignal strverscmp \
1295 strtol strtoul strtoll strtoull setenv unsetenv \
1296 errno snprintf vsnprintf vasprintf malloc realloc calloc \
1297 free getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1298 #include "ansidecl.h"
1299 #include "system.h"])
1301 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1302 #include "ansidecl.h"
1304 #ifdef HAVE_SYS_RESOURCE_H
1305 #include <sys/resource.h>
1309 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1310 #include "ansidecl.h"
1312 #ifdef HAVE_SYS_RESOURCE_H
1313 #include <sys/resource.h>
1315 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1316 [Define to `long' if <sys/resource.h> doesn't define.])])
1318 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1319 # FREAD and FWRITE macros. Fortunately, for GCC's single usage of ldgetname
1320 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1321 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1322 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1323 #include "ansidecl.h"
1332 gcc_AC_CHECK_DECLS(times, , ,[
1333 #include "ansidecl.h"
1335 #ifdef HAVE_SYS_TIMES_H
1336 #include <sys/times.h>
1340 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1341 #include "ansidecl.h"
1346 # More time-related stuff.
1347 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1348 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1349 #include "ansidecl.h"
1351 #ifdef HAVE_SYS_TIMES_H
1352 #include <sys/times.h>
1354 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1355 if test $ac_cv_struct_tms = yes; then
1356 AC_DEFINE(HAVE_STRUCT_TMS, 1,
1357 [Define if <sys/times.h> defines struct tms.])
1360 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1361 # revisit after autoconf 2.50.
1362 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1363 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1364 #include "ansidecl.h"
1366 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1367 if test $gcc_cv_type_clock_t = yes; then
1368 AC_DEFINE(HAVE_CLOCK_T, 1,
1369 [Define if <time.h> defines clock_t.])
1372 # Check if F_SETLKW is supported by fcntl.
1373 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1374 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1375 #include <fcntl.h>]], [[
1381 return fcntl (1, F_SETLKW, &fl);]])],
1382 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1383 if test $ac_cv_f_setlkw = yes; then
1384 AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1385 [Define if F_SETLKW supported by fcntl.])
1388 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1389 CFLAGS="$saved_CFLAGS"
1390 CXXFLAGS="$saved_CXXFLAGS"
1392 # mkdir takes a single argument on some systems.
1393 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1401 # With Setjmp/Longjmp based exception handling.
1402 AC_ARG_ENABLE(sjlj-exceptions,
1403 [AS_HELP_STRING([--enable-sjlj-exceptions],
1404 [arrange to use setjmp/longjmp exception handling])],
1407 if test $enableval != yes; then
1408 AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1413 force_sjlj_exceptions=yes],
1416 force_sjlj_exceptions=yes
1420 force_sjlj_exceptions=yes
1424 force_sjlj_exceptions=no
1427 if test $force_sjlj_exceptions = yes; then
1428 sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1429 AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1430 [Define 0/1 to force the choice for exception handling model.])
1433 # --------------------------------------------------------
1434 # Build, host, and target specific configuration fragments
1435 # --------------------------------------------------------
1437 # Collect build-machine-specific information.
1438 . ${srcdir}/config.build
1440 # Collect host-machine-specific information.
1441 . ${srcdir}/config.host
1445 # Collect target-machine-specific information.
1446 . ${srcdir}/config.gcc
1448 extra_objs="${host_extra_objs} ${extra_objs}"
1449 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1451 # Default the target-machine variables that were not explicitly set.
1452 if test x"$tm_file" = x
1453 then tm_file=$cpu_type/$cpu_type.h; fi
1455 if test x"$extra_headers" = x
1456 then extra_headers=; fi
1458 if test x$md_file = x
1459 then md_file=$cpu_type/$cpu_type.md; fi
1461 if test x$out_file = x
1462 then out_file=$cpu_type/$cpu_type.c; fi
1464 if test x"$tmake_file" = x
1465 then tmake_file=$cpu_type/t-$cpu_type
1468 # Support --enable-initfini-array.
1469 if test x$enable_initfini_array != xno; then
1470 tm_file="${tm_file} initfini-array.h"
1473 if test x"$dwarf2" = xyes
1474 then tm_file="$tm_file tm-dwarf2.h"
1477 # Say what files are being used for the output code and MD file.
1478 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1479 echo "Using \`$srcdir/config/$md_file' as machine description file."
1481 # If any of the xm_file variables contain nonexistent files, warn
1482 # about them and drop them.
1485 for x in $build_xm_file; do
1486 if test -f $srcdir/config/$x
1488 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1494 for x in $host_xm_file; do
1495 if test -f $srcdir/config/$x
1497 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1503 for x in $xm_file; do
1504 if test -f $srcdir/config/$x
1506 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1512 for f in $tm_file; do
1515 if test $count = ax; then
1516 echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1518 echo "Using the following target machine macro files:"
1519 for f in $tm_file; do
1520 echo " $srcdir/config/$f"
1524 if test x$use_long_long_for_widest_fast_int = xyes; then
1525 AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1526 [Define to 1 if the 'long long' type is wider than 'long' but still
1527 efficiently supported by the host hardware.])
1530 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1531 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1533 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1534 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1537 for f in $host_xm_file; do
1540 if test $count = a; then
1542 elif test $count = ax; then
1543 echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1545 echo "Using the following host machine macro files:"
1546 for f in $host_xm_file; do
1547 echo " $srcdir/config/$f"
1550 echo "Using ${out_host_hook_obj} for host machine hooks."
1552 if test "$host_xm_file" != "$build_xm_file"; then
1554 for f in $build_xm_file; do
1557 if test $count = a; then
1559 elif test $count = ax; then
1560 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1562 echo "Using the following build machine macro files:"
1563 for f in $build_xm_file; do
1564 echo " $srcdir/config/$f"
1569 if test -n "$configured_native_system_header_dir"; then
1570 native_system_header_dir=$configured_native_system_header_dir
1572 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1573 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1577 AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1578 gcc_cv_mcontext_underscores,
1580 #include <sys/cdefs.h>
1581 #include <sys/signal.h>
1582 #include <ucontext.h>
1583 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1585 gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1586 if test $gcc_cv_mcontext_underscores = yes; then
1587 AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1588 [mcontext_t fields start with __])
1597 # Check if a valid thread package
1598 case ${enable_threads} in
1601 target_thread_file='single'
1605 target_thread_file='single'
1607 aix | dce | lynx | mipssde | posix | rtems | \
1608 single | tpf | vxworks | win32)
1609 target_thread_file=${enable_threads}
1612 echo "${enable_threads} is an unknown thread package" 1>&2
1617 if test x${thread_file} = x; then
1618 # No thread file set by target-specific clauses in config.gcc,
1619 # so use file chosen by default logic above
1620 thread_file=${target_thread_file}
1628 if test x$enable___cxa_atexit = xyes || \
1629 test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1630 if test x$host = x$target; then
1632 # mingw32 doesn't have __cxa_atexit but uses atexit registration
1633 # keyed to flag_use_cxa_atexit
1641 AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1642 [echo "__cxa_atexit can't be enabled on this target"])
1646 # We can't check for __cxa_atexit when building a cross, so assume
1650 if test x$use_cxa_atexit = xyes; then
1651 AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1652 [Define if you want to use __cxa_atexit, rather than atexit, to
1653 register C++ destructors for local statics and global objects.
1654 This is essential for fully standards-compliant handling of
1655 destructors, but requires __cxa_atexit in libc.])
1659 # Look for a file containing extra machine modes.
1660 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1661 extra_modes_file='$(srcdir)'/config/${extra_modes}
1662 AC_SUBST(extra_modes_file)
1663 AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1664 [Define to the name of a file containing a list of extra machine modes
1665 for this architecture.])
1668 # Convert extra_options into a form suitable for Makefile use.
1671 for f in $extra_options; do
1672 extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1673 all_opt_files="$all_opt_files $srcdir/config/$f"
1675 AC_SUBST(extra_opt_files)
1677 # auto-host.h is the file containing items generated by autoconf and is
1678 # the first file included by config.h.
1679 # If host=build, it is correct to have bconfig include auto-host.h
1680 # as well. If host!=build, we are in error and need to do more
1681 # work to find out the build config parameters.
1682 if test x$host = x$build
1684 build_auto=auto-host.h
1686 # We create a subdir, then run autoconf in the subdir.
1687 # To prevent recursion we set host and build for the new
1688 # invocation of configure to the build for this invocation
1695 /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1696 *) realsrcdir=../${srcdir};;
1698 # Clearing GMPINC is necessary to prevent host headers being
1699 # used by the build compiler. Defining GENERATOR_FILE stops
1700 # system.h from including gmp.h.
1701 CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1702 CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
1703 LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1704 GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
1705 ${realsrcdir}/configure \
1706 --enable-languages=${enable_languages-all} \
1707 --target=$target_alias --host=$build_alias --build=$build_alias
1709 # We just finished tests for the build machine, so rename
1710 # the file auto-build.h in the gcc directory.
1711 mv auto-host.h ../auto-build.h
1714 build_auto=auto-build.h
1716 AC_SUBST(build_subdir)
1718 tm_file="${tm_file} defaults.h"
1719 tm_p_file="${tm_p_file} tm-preds.h"
1720 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1721 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1722 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1723 # put this back in temporarily.
1724 xm_file="auto-host.h ansidecl.h ${xm_file}"
1731 # Compile in configure arguments.
1732 if test -f configargs.h ; then
1733 # Being re-configured.
1734 gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1735 gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1737 gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1740 # Double all backslashes and backslash all quotes to turn
1741 # gcc_config_arguments into a C string.
1742 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1743 $gcc_config_arguments
1745 gcc_config_arguments_str=`cat conftest.out`
1748 cat > configargs.h <<EOF
1749 /* Generated automatically. */
1750 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1751 static const char thread_model[] = "$thread_file";
1753 static const struct {
1754 const char *name, *value;
1755 } configure_default_options[] = $configure_default_options;
1760 gcc_BASEVER=`cat $srcdir/BASE-VER`
1761 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1762 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1763 if test -f $srcdir/REVISION ; then
1764 gcc_REVISION=`cat $srcdir/REVISION`
1768 cat > plugin-version.h <<EOF
1769 #include "configargs.h"
1771 #define GCCPLUGIN_VERSION_MAJOR `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
1772 #define GCCPLUGIN_VERSION_MINOR `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
1773 #define GCCPLUGIN_VERSION_PATCHLEVEL `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
1774 #define GCCPLUGIN_VERSION (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
1776 static char basever[] = "$gcc_BASEVER";
1777 static char datestamp[] = "$gcc_DATESTAMP";
1778 static char devphase[] = "$gcc_DEVPHASE";
1779 static char revision[] = "$gcc_REVISION";
1781 /* FIXME plugins: We should make the version information more precise.
1782 One way to do is to add a checksum. */
1784 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1786 configuration_arguments};
1790 # Internationalization
1791 ZW_GNU_GETTEXT_SISTER_DIR
1793 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1794 # -liconv on the link line twice.
1795 case "$LIBINTL" in *$LIBICONV*)
1799 AC_ARG_ENABLE(secureplt,
1800 [AS_HELP_STRING([--enable-secureplt],
1801 [enable -msecure-plt by default for PowerPC])],
1804 AC_ARG_ENABLE(leading-mingw64-underscores,
1805 AS_HELP_STRING([--enable-leading-mingw64-underscores],
1806 [enable leading underscores on 64 bit mingw targets]),
1808 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1809 [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1810 [Define if we should use leading underscore on 64 bit mingw targets])])
1813 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
1816 AC_ARG_ENABLE(frame-pointer,
1817 [AS_HELP_STRING([--enable-frame-pointer],
1818 [enable -fno-omit-frame-pointer by default for 32bit x86])], [],
1821 linux* | darwin[[8912]]*)
1822 # Enable -fomit-frame-pointer by default for Linux and Darwin with
1824 enable_frame_pointer=no
1827 enable_frame_pointer=yes
1832 # Windows32 Registry support for specifying GCC installation paths.
1833 AC_ARG_ENABLE(win32-registry,
1834 [AS_HELP_STRING([--disable-win32-registry],
1835 [disable lookup of installation paths in the
1836 Registry on Windows hosts])
1837 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
1838 AS_HELP_STRING([--enable-win32-registry=KEY],
1839 [use KEY instead of GCC version as the last portion
1840 of the registry key])],,)
1843 win32 | pe | cygwin* | mingw32*)
1844 if test "x$enable_win32_registry" != xno; then
1845 AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1848 if test "x$enable_win32_registry" != xno; then
1849 AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1850 [Define to 1 if installation paths should be looked up in the Windows
1851 Registry. Ignored on non-Windows hosts.])
1853 if test "x$enable_win32_registry" != xyes \
1854 && test "x$enable_win32_registry" != x; then
1855 AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1856 [Define to be the last component of the Windows registry key under which
1857 to look for installation paths. The full key used will be
1858 HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1859 The default is the GCC version number.])
1865 # Get an absolute path to the GCC top-level source directory
1866 holddir=`${PWDCMD-pwd}`
1868 topdir=`${PWDCMD-pwd}`
1871 # Conditionalize the makefile for this host machine.
1873 for f in ${host_xmake_file}
1875 if test -f ${srcdir}/config/$f
1877 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1881 # Conditionalize the makefile for this target machine.
1883 for f in ${tmake_file}
1885 if test -f ${srcdir}/config/$f
1887 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1890 tmake_file="${tmake_file_}"
1892 out_object_file=`basename $out_file .c`.o
1893 common_out_object_file=`basename $common_out_file .c`.o
1895 tm_file_list="options.h"
1896 tm_include_list="options.h insn-constants.h"
1897 for f in $tm_file; do
1900 f=`echo $f | sed 's/^..//'`
1901 tm_file_list="${tm_file_list} $f"
1902 tm_include_list="${tm_include_list} $f"
1905 tm_file_list="${tm_file_list} \$(srcdir)/$f"
1906 tm_include_list="${tm_include_list} $f"
1909 tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1910 tm_include_list="${tm_include_list} config/$f"
1917 for f in $tm_p_file; do
1920 tm_p_file_list="${tm_p_file_list} $f"
1921 tm_p_include_list="${tm_p_include_list} $f"
1924 tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1925 tm_p_include_list="${tm_p_include_list} config/$f"
1931 for f in $xm_file; do
1934 xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1935 xm_include_list="${xm_include_list} $f"
1938 xm_file_list="${xm_file_list} $f"
1939 xm_include_list="${xm_include_list} $f"
1942 xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1943 xm_include_list="${xm_include_list} config/$f"
1949 host_xm_include_list=
1950 for f in $host_xm_file; do
1953 host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1954 host_xm_include_list="${host_xm_include_list} $f"
1957 host_xm_file_list="${host_xm_file_list} $f"
1958 host_xm_include_list="${host_xm_include_list} $f"
1961 host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1962 host_xm_include_list="${host_xm_include_list} config/$f"
1968 for f in $build_xm_file; do
1971 build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1972 build_xm_include_list="${build_xm_include_list} $f"
1974 auto-build.h | auto-host.h )
1975 build_xm_file_list="${build_xm_file_list} $f"
1976 build_xm_include_list="${build_xm_include_list} $f"
1979 build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1980 build_xm_include_list="${build_xm_include_list} config/$f"
1985 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1986 # cross-compiler which does not use the native headers and libraries.
1987 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1988 CROSS= AC_SUBST(CROSS)
1989 ALL=all.internal AC_SUBST(ALL)
1990 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1992 if test "x$with_build_sysroot" != x; then
1993 build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1995 # This value is used, even on a native system, because
1996 # CROSS_SYSTEM_HEADER_DIR is just
1997 # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1998 build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
2001 if test x$host != x$target
2003 CROSS="-DCROSS_DIRECTORY_STRUCTURE"
2005 SYSTEM_HEADER_DIR=$build_system_header_dir
2006 case "$host","$target" in
2007 # Darwin crosses can use the host system's libraries and headers,
2008 # because of the fat library support. Of course, it must be the
2009 # same version of Darwin on both sides. Allow the user to
2010 # just say --target=foo-darwin without a version number to mean
2011 # "the version on this system".
2012 *-*-darwin*,*-*-darwin*)
2013 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
2014 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
2015 if test $hostos = $targetos -o $targetos = darwin ; then
2017 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
2022 i?86-*-*,x86_64-*-* \
2023 | powerpc*-*-*,powerpc64*-*-*)
2024 CROSS="$CROSS -DNATIVE_CROSS" ;;
2029 if test "x$with_headers" = x; then
2036 elif test "x$TARGET_SYSTEM_ROOT" != x; then
2037 SYSTEM_HEADER_DIR=$build_system_header_dir
2040 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
2041 if test "x$with_headers" != x && test "x$with_headers" != xyes; then
2042 target_header_dir=$with_headers
2043 elif test "x$with_sysroot" = x; then
2044 target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
2045 elif test "x$with_build_sysroot" != "x"; then
2046 target_header_dir="${with_build_sysroot}${native_system_header_dir}"
2047 elif test "x$with_sysroot" = xyes; then
2048 target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
2050 target_header_dir="${with_sysroot}${native_system_header_dir}"
2053 target_header_dir=${native_system_header_dir}
2056 # If this is a cross-compiler that does not
2057 # have its own set of headers then define
2060 # If this is using newlib, without having the headers available now,
2061 # then define inhibit_libc in LIBGCC2_CFLAGS.
2062 # This prevents libgcc2 from containing any code which requires libc
2064 : ${inhibit_libc=false}
2065 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
2066 test x$with_newlib = xyes ; } &&
2067 { test "x$with_headers" = xno || test ! -f "$target_header_dir/stdio.h"; } ; then
2070 AC_SUBST(inhibit_libc)
2072 # When building gcc with a cross-compiler, we need to adjust things so
2073 # that the generator programs are still built with the native compiler.
2074 # Also, we cannot run fixincludes.
2076 # These are the normal (build=host) settings:
2077 CC_FOR_BUILD='$(CC)' AC_SUBST(CC_FOR_BUILD)
2078 CXX_FOR_BUILD='$(CXX)' AC_SUBST(CXX_FOR_BUILD)
2079 BUILD_CFLAGS='$(ALL_CFLAGS)' AC_SUBST(BUILD_CFLAGS)
2080 BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
2081 BUILD_LDFLAGS='$(LDFLAGS)' AC_SUBST(BUILD_LDFLAGS)
2082 STMP_FIXINC=stmp-fixinc AC_SUBST(STMP_FIXINC)
2084 BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS)' AC_SUBST(BUILD_NO_PIE_CFLAGS)
2085 BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG)' AC_SUBST(BUILD_NO_PIE_FLAG)
2087 # And these apply if build != host, or we are generating coverage data
2088 if test x$build != x$host || test "x$coverage_flags" != x
2090 BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
2091 BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CXXFLAGS_FOR_BUILD)'
2092 BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
2094 NO_PIE_CFLAGS_FOR_BUILD=${NO_PIE_CFLAGS_FOR_BUILD-${NO_PIE_CFLAGS}}
2095 NO_PIE_FLAG_FOR_BUILD=${NO_PIE_FLAG_FOR_BUILD-${NO_PIE_FLAG}}
2096 BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS_FOR_BUILD)'
2097 BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG_FOR_BUILD)'
2099 AC_SUBST(NO_PIE_CFLAGS_FOR_BUILD)
2100 AC_SUBST(NO_PIE_FLAG_FOR_BUILD)
2102 # Expand extra_headers to include complete path.
2103 # This substitutes for lots of t-* files.
2105 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
2106 for file in ${extra_headers} ; do
2107 extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
2110 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
2111 if test x"$use_gcc_tgmath" = xyes
2112 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
2115 # Define collect2 in Makefile.
2116 case $host_can_use_collect2 in
2118 *) collect2='collect2$(exeext)' ;;
2120 AC_SUBST([collect2])
2122 # Add a definition of USE_COLLECT2 if system wants one.
2123 case $use_collect2 in
2124 no) use_collect2= ;;
2127 host_xm_defines="${host_xm_defines} USE_COLLECT2"
2128 xm_defines="${xm_defines} USE_COLLECT2"
2129 case $host_can_use_collect2 in
2131 AC_MSG_ERROR([collect2 is required but cannot be built on this system])
2137 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
2138 [Define to the name of the LTO plugin DSO that must be
2139 passed to the linker's -plugin=LIB option.])
2141 # ---------------------------
2142 # Assembler & linker features
2143 # ---------------------------
2145 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
2146 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
2147 # However when ld-new is first executed from the build tree, libtool will
2148 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
2149 # to the build tree. While doing this we need to use the previous-stage
2150 # linker, or we have an infinite loop. The presence of a shell script as
2151 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
2152 # the gcc/collect-ld script. So we need to know how libtool works, or
2153 # exec-tool will fail.
2155 m4_defun([_LT_CONFIG_COMMANDS], [])
2158 AC_SUBST(enable_fast_install)
2160 # Identify the assembler which will work hand-in-glove with the newly
2161 # built GCC, so that we can examine its features. This is the assembler
2162 # which will be driven by the driver program.
2164 # If build != host, and we aren't building gas in-tree, we identify a
2165 # build->target assembler and hope that it will have the same features
2166 # as the host->target assembler we'll be using.
2167 gcc_cv_gas_major_version=
2168 gcc_cv_gas_minor_version=
2169 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
2171 m4_pattern_allow([AS_FOR_TARGET])dnl
2172 AS_VAR_SET_IF(gcc_cv_as,, [
2173 if test -x "$DEFAULT_ASSEMBLER"; then
2174 gcc_cv_as="$DEFAULT_ASSEMBLER"
2175 elif test -f $gcc_cv_as_gas_srcdir/configure.ac \
2176 && test -f ../gas/Makefile \
2177 && test x$build = x$host; then
2178 gcc_cv_as=../gas/as-new$build_exeext
2179 elif test -x as$build_exeext; then
2180 # Build using assembler in the current directory.
2181 gcc_cv_as=./as$build_exeext
2182 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
2183 gcc_cv_as="$AS_FOR_TARGET"
2185 AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
2188 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
2189 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
2190 case "$ORIGINAL_AS_FOR_TARGET" in
2191 ./as | ./as$build_exeext) ;;
2192 *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
2195 AC_MSG_CHECKING(what assembler to use)
2196 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
2197 # Single tree build which includes gas. We want to prefer it
2198 # over whatever linker top-level may have detected, since
2199 # we'll use what we're building after installation anyway.
2200 AC_MSG_RESULT(newly built gas)
2202 _gcc_COMPUTE_GAS_VERSION
2203 in_tree_gas_is_elf=no
2204 if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
2205 || (grep 'obj_format = multi' ../gas/Makefile \
2206 && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
2208 in_tree_gas_is_elf=yes
2211 AC_MSG_RESULT($gcc_cv_as)
2217 [[ --enable-ld[=ARG] build ld [ARG={default,yes,no}]]],
2218 [case "${enableval}" in
2224 install_gold_as_default=no
2226 [[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
2227 [case "${enableval}" in
2229 install_gold_as_default=yes
2232 if test x${default_ld} != x; then
2233 install_gold_as_default=yes
2239 AC_MSG_ERROR([invalid --enable-gold argument])
2243 # Identify the linker which will work hand-in-glove with the newly
2244 # built GCC, so that we can examine its features. This is the linker
2245 # which will be driven by the driver program.
2247 # If build != host, and we aren't building gas in-tree, we identify a
2248 # build->target linker and hope that it will have the same features
2249 # as the host->target linker we'll be using.
2250 gcc_cv_gld_major_version=
2251 gcc_cv_gld_minor_version=
2252 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
2253 gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
2254 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
2256 AS_VAR_SET_IF(gcc_cv_ld,, [
2257 if test -x "$DEFAULT_LINKER"; then
2258 gcc_cv_ld="$DEFAULT_LINKER"
2259 elif test $install_gold_as_default = yes \
2260 && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
2261 && test -f ../gold/Makefile \
2262 && test x$build = x$host; then
2263 gcc_cv_ld=../gold/ld-new$build_exeext
2264 elif test -f $gcc_cv_ld_gld_srcdir/configure.ac \
2265 && test -f ../ld/Makefile \
2266 && test x$build = x$host; then
2267 gcc_cv_ld=../ld/ld-new$build_exeext
2268 elif test -x collect-ld$build_exeext; then
2269 # Build using linker in the current directory.
2270 gcc_cv_ld=./collect-ld$build_exeext
2271 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2272 gcc_cv_ld="$LD_FOR_TARGET"
2274 AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2277 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2278 PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
2279 # if the PLUGIN_LD is set ld-new, just have it as ld
2280 # as that is the installed named.
2281 if test x$PLUGIN_LD_SUFFIX = xld-new \
2282 || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
2285 AC_ARG_WITH(plugin-ld,
2286 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2287 [if test x"$withval" != x; then
2288 ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2289 PLUGIN_LD_SUFFIX="$withval"
2291 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2292 AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
2294 # Check to see if we are using gold instead of ld
2295 AC_MSG_CHECKING(whether we are using gold)
2297 if test x$gcc_cv_ld != x; then
2298 if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2299 | grep "GNU gold" > /dev/null; then
2303 AC_MSG_RESULT($ld_is_gold)
2305 AC_MSG_CHECKING(gold linker with split stack support as non default)
2306 # Check to see if default ld is not gold, but gold is
2307 # available and has support for split stack. If gcc was configured
2308 # with gold then no checking is done.
2310 if test x$ld_is_gold = xno && which ${gcc_cv_ld}.gold >/dev/null 2>&1; then
2312 # For platforms other than powerpc64*, enable as appropriate.
2315 ld_gold=`which ${gcc_cv_ld}.gold`
2316 # Make sure this gold has minimal split stack support
2317 if $ld_gold --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
2318 ld_vers=`$ld_gold --version | sed 1q`
2319 gold_vers=`echo $ld_vers | sed -n \
2320 -e 's,^[[^)]]*[[ ]]\([[0-9]][[0-9]]*\.[[0-9]][[0-9]]*[[^)]]*\)) .*$,\1,p'`
2322 # check that the gold version contains the complete split stack support
2323 # on powerpc64 big and little endian
2325 case "$gold_vers" in
2326 2.25.[[1-9]]*|2.2[[6-9]][[.0-9]]*|2.[[3-9]][[.0-9]]*|[[3-9]].[[.0-9]]*) gold_non_default=yes
2328 *) gold_non_default=no
2334 if test $gold_non_default = yes; then
2335 AC_DEFINE(HAVE_GOLD_NON_DEFAULT_SPLIT_STACK, 1,
2336 [Define if the gold linker supports split stack and is available as a non-default])
2339 AC_MSG_RESULT($gold_non_default)
2341 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2342 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2343 case "$ORIGINAL_LD_FOR_TARGET" in
2344 ./collect-ld | ./collect-ld$build_exeext) ;;
2345 *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2348 AC_MSG_CHECKING(what linker to use)
2349 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2350 || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2351 # Single tree build which includes ld. We want to prefer it
2352 # over whatever linker top-level may have detected, since
2353 # we'll use what we're building after installation anyway.
2354 AC_MSG_RESULT(newly built ld)
2356 in_tree_ld_is_elf=no
2357 if (grep 'EMUL = .*elf' ../ld/Makefile \
2358 || grep 'EMUL = .*linux' ../ld/Makefile \
2359 || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2360 in_tree_ld_is_elf=yes
2361 elif test "$ld_is_gold" = yes; then
2362 in_tree_ld_is_elf=yes
2364 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
2367 gcc_cv_gld_version=`sed -n -e 's/^[ ]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
2368 if test x$gcc_cv_gld_version != x; then
2372 case $gcc_cv_gld_version in
2375 *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
2378 gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2379 gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2381 ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
2382 ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
2384 AC_MSG_RESULT($gcc_cv_ld)
2386 gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
2387 ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
2388 ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
2391 AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
2392 AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)
2394 # Figure out what nm we will be using.
2395 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2396 AS_VAR_SET_IF(gcc_cv_nm,, [
2397 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2398 && test -f ../binutils/Makefile \
2399 && test x$build = x$host; then
2400 gcc_cv_nm=../binutils/nm-new$build_exeext
2401 elif test -x nm$build_exeext; then
2402 gcc_cv_nm=./nm$build_exeext
2403 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2404 gcc_cv_nm="$NM_FOR_TARGET"
2406 AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2409 AC_MSG_CHECKING(what nm to use)
2410 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2411 # Single tree build which includes binutils.
2412 AC_MSG_RESULT(newly built nm)
2415 AC_MSG_RESULT($gcc_cv_nm)
2419 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2420 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2421 case "$ORIGINAL_NM_FOR_TARGET" in
2422 ./nm | ./nm$build_exeext) ;;
2423 *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2427 # Figure out what objdump we will be using.
2428 AS_VAR_SET_IF(gcc_cv_objdump,, [
2429 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2430 && test -f ../binutils/Makefile \
2431 && test x$build = x$host; then
2432 # Single tree build which includes binutils.
2433 gcc_cv_objdump=../binutils/objdump$build_exeext
2434 elif test -x objdump$build_exeext; then
2435 gcc_cv_objdump=./objdump$build_exeext
2436 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2437 gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2439 AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2442 AC_MSG_CHECKING(what objdump to use)
2443 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2444 # Single tree build which includes binutils.
2445 AC_MSG_RESULT(newly built objdump)
2446 elif test x$gcc_cv_objdump = x; then
2447 AC_MSG_RESULT(not found)
2449 AC_MSG_RESULT($gcc_cv_objdump)
2452 # Figure out what readelf we will be using.
2453 AS_VAR_SET_IF(gcc_cv_readelf,, [
2454 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2455 && test -f ../binutils/Makefile \
2456 && test x$build = x$host; then
2457 # Single tree build which includes binutils.
2458 gcc_cv_readelf=../binutils/readelf$build_exeext
2459 elif test -x readelf$build_exeext; then
2460 gcc_cv_readelf=./readelf$build_exeext
2461 elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
2462 gcc_cv_readelf="$READELF_FOR_TARGET"
2464 AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
2467 AC_MSG_CHECKING(what readelf to use)
2468 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2469 # Single tree build which includes binutils.
2470 AC_MSG_RESULT(newly built readelf)
2471 elif test x$gcc_cv_readelf = x; then
2472 AC_MSG_RESULT(not found)
2474 AC_MSG_RESULT($gcc_cv_readelf)
2477 # Figure out what assembler alignment features are present.
2478 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2482 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2483 [Define if your assembler supports .balign and .p2align.])])
2485 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2488 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2489 [Define if your assembler supports specifying the maximum number
2490 of bytes to skip when using the GAS .p2align command.])])
2492 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2495 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2496 [Define if your assembler supports .literal16.])])
2498 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2500 [conftest_label1: .word 0
2502 conftest_label2: .word 0
2504 [if test x$gcc_cv_nm != x; then
2505 $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2506 $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2507 if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2509 else gcc_cv_as_subsection_m1=yes
2511 rm -f conftest.nm1 conftest.nm2
2513 [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2514 [Define if your assembler supports .subsection and .subsection -1 starts
2515 emitting at the beginning of your section.])])
2517 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2520 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2522 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2524 [ .weakref foobar, barfnot],,
2525 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2527 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2530 .NSUBSPA $CODE$,COMDAT],,
2531 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2533 # .hidden needs to be supported in both the assembler and the linker,
2534 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2535 # This is irritatingly difficult to feature test for; we have to check the
2536 # date string after the version number. If we've got an in-tree
2537 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2539 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2542 conftest_s=' .globl foobar,hidden'
2545 conftest_s=' .hidden foobar
2549 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2550 [elf,2,13,0],, [$conftest_s])
2553 # Darwin as has some visibility support, though with a different syntax.
2554 gcc_cv_as_hidden=yes
2558 # gnu_indirect_function type is an extension proposed at
2559 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2560 # selection of function implementation
2561 AC_ARG_ENABLE(gnu-indirect-function,
2562 [AS_HELP_STRING([--enable-gnu-indirect-function],
2563 [enable the use of the @gnu_indirect_function to glibc systems])],
2564 [case $enable_gnu_indirect_function in
2566 *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2567 Valid choices are 'yes' and 'no'.]) ;;
2569 [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2571 gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
2572 AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
2573 [Define if your system supports gnu indirect functions.])
2577 if test $in_tree_ld != yes ; then
2578 ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2579 if echo "$ld_ver" | grep GNU > /dev/null; then
2580 if test x"$ld_is_gold" = xyes; then
2581 # GNU gold --version looks like this:
2583 # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
2585 # We extract the binutils version which is more familiar and specific
2586 # than the gold version.
2587 ld_vers=`echo $ld_ver | sed -n \
2588 -e 's,^[^)]*[ ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
2590 # GNU ld --version looks like this:
2592 # GNU ld (GNU Binutils) 2.21.51.20110225
2593 ld_vers=`echo $ld_ver | sed -n \
2594 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2596 ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2597 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2598 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2599 ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2603 # See acinclude.m4 (gcc_SUN_LD_VERSION) for the version number
2606 # Don't reuse gcc_gv_sun_ld_vers_* in case a linker other than
2607 # /usr/ccs/bin/ld has been configured.
2608 ld_ver=`$gcc_cv_ld -V 2>&1`
2609 if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2610 ld_vers=`echo $ld_ver | sed -n \
2611 -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2612 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2613 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2621 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2622 [[if test $in_tree_ld = yes ; then
2624 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2625 && test $in_tree_ld_is_elf = yes; then
2626 gcc_cv_ld_hidden=yes
2629 gcc_cv_ld_hidden=yes
2630 if test x"$ld_is_gold" = xyes; then
2632 elif echo "$ld_ver" | grep GNU > /dev/null; then
2634 mmix-knuth-mmixware)
2635 # The linker emits by default mmo, not ELF, so "no" is appropriate.
2639 if test 0"$ld_date" -lt 20020404; then
2640 if test -n "$ld_date"; then
2641 # If there was date string, but was earlier than 2002-04-04, fail
2643 elif test -z "$ld_vers"; then
2644 # If there was no date string nor ld version number, something is wrong
2647 test -z "$ld_vers_patch" && ld_vers_patch=0
2648 if test "$ld_vers_major" -lt 2; then
2650 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2651 gcc_cv_ld_hidden="no"
2652 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2660 gcc_cv_ld_hidden=yes
2663 # Darwin ld has some visibility support.
2664 gcc_cv_ld_hidden=yes
2666 hppa64*-*-hpux* | ia64*-*-hpux*)
2667 gcc_cv_ld_hidden=yes
2669 *-*-solaris2.1[0-9]*)
2670 # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2671 # .symbolic was only added in Solaris 9 12/02.
2672 gcc_cv_ld_hidden=yes
2680 libgcc_visibility=no
2681 AC_SUBST(libgcc_visibility)
2682 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2683 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2684 libgcc_visibility=yes
2685 AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2686 [Define if your assembler and linker support .hidden.])
2689 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2690 gcc_cv_ld_ro_rw_mix=unknown
2691 if test $in_tree_ld = yes ; then
2692 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2693 && test $in_tree_ld_is_elf = yes; then
2694 gcc_cv_ld_ro_rw_mix=read-write
2696 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2697 echo '.section myfoosect, "a"' > conftest1.s
2698 echo '.section myfoosect, "aw"' > conftest2.s
2699 echo '.byte 1' >> conftest2.s
2700 echo '.section myfoosect, "a"' > conftest3.s
2701 echo '.byte 0' >> conftest3.s
2702 if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2703 && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2704 && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2705 && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2706 conftest2.o conftest3.o > /dev/null 2>&1; then
2707 gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2708 | sed -e '/myfoosect/!d' -e N`
2709 if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2710 if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2711 gcc_cv_ld_ro_rw_mix=read-only
2713 gcc_cv_ld_ro_rw_mix=read-write
2718 rm -f conftest.* conftest[123].*
2721 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2722 AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2723 [Define if your linker links a mix of read-only
2724 and read-write sections into a read-write section.])
2726 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2728 gcc_AC_INITFINI_ARRAY
2730 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2731 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2739 [[# GAS versions before 2.11 do not support uleb128,
2740 # despite appearing to.
2741 # ??? There exists an elf-specific test that will crash
2742 # the assembler. Perhaps it's better to figure out whether
2743 # arbitrary sections are supported and try the test.
2744 as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2745 if echo "$as_ver" | grep GNU > /dev/null; then
2746 as_vers=`echo $as_ver | sed -n \
2747 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2748 as_major=`expr "$as_vers" : '\([0-9]*\)'`
2749 as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2750 if test $as_major -eq 2 && test $as_minor -lt 11
2752 else gcc_cv_as_leb128=yes
2755 [AC_DEFINE(HAVE_AS_LEB128, 1,
2756 [Define if your assembler supports .sleb128 and .uleb128.])])
2758 # Check if we have assembler support for unwind directives.
2759 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2766 .cfi_escape 1, 2, 3, 4, 5
2770 # If the linker used on Solaris (like Sun ld) isn't capable of merging
2771 # read-only and read-write sections, we need to make sure that the
2772 # assembler used emits read-write .eh_frame sections.
2773 if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2774 if test "x$gcc_cv_objdump" != x; then
2775 if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2776 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2777 gcc_cv_as_cfi_directive=no
2780 i?86-*-solaris2.1[[0-9]]* | x86_64-*-solaris2.1[[0-9]]*)
2781 # On Solaris/x86, make sure that GCC and assembler agree on using
2782 # read-only .eh_frame sections for 64-bit.
2783 if test x$gas = xyes; then
2784 as_ix86_64_opt="--64"
2786 as_ix86_64_opt="-xarch=amd64"
2788 if $gcc_cv_as $as_ix86_64_opt -o conftest.o conftest.s > /dev/null 2>&1 && \
2789 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2790 sed -e /.eh_frame/!d -e N | \
2791 grep READONLY > /dev/null; then
2792 gcc_cv_as_cfi_directive=yes
2794 gcc_cv_as_cfi_directive=no
2798 gcc_cv_as_cfi_directive=yes
2803 # no objdump, err on the side of caution
2804 gcc_cv_as_cfi_directive=no
2807 gcc_cv_as_cfi_directive=yes
2811 gcc_cv_as_cfi_directive=yes
2814 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2815 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2819 .cfi_adjust_cfa_offset 64
2821 .cfi_adjust_cfa_offset 128
2824 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2825 | grep 'DW_CFA_advance_loc[24]:[ ][ ]*75040[ ]' >/dev/null; then
2826 gcc_cv_as_cfi_advance_working=yes
2830 # no objdump, err on the side of caution
2831 gcc_cv_as_cfi_advance_working=no
2833 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2834 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2835 [`if test $gcc_cv_as_cfi_directive = yes \
2836 && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2837 [Define 0/1 if your assembler supports CFI directives.])
2839 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2840 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2841 gcc_cv_as_cfi_personality_directive, ,,
2844 .cfi_personality 0, symbol
2846 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2847 [`if test $gcc_cv_as_cfi_personality_directive = yes;
2848 then echo 1; else echo 0; fi`],
2849 [Define 0/1 if your assembler supports .cfi_personality.])
2851 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2852 gcc_cv_as_cfi_sections_directive, ,,
2854 .cfi_sections .debug_frame, .eh_frame
2858 win32 | pe | cygwin* | mingw32*)
2859 # Need to check that we generated the correct relocation for the
2860 # .debug_frame section. This was fixed for binutils 2.21.
2861 gcc_cv_as_cfi_sections_directive=no
2862 if test "x$gcc_cv_objdump" != x; then
2863 if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2864 grep secrel > /dev/null; then
2865 gcc_cv_as_cfi_sections_directive=yes
2870 gcc_cv_as_cfi_sections_directive=yes
2873 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2874 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2875 [`if test $gcc_cv_as_cfi_sections_directive = yes;
2876 then echo 1; else echo 0; fi`],
2877 [Define 0/1 if your assembler supports .cfi_sections.])
2879 # GAS versions up to and including 2.11.0 may mis-optimize
2881 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2889 .section .eh_frame,"aw",@progbits
2891 .4byte .LECIE1-.LSCIE1
2905 .4byte .LEFDE1-.LASFDE1
2907 .4byte .LASFDE1-__FRAME_BEGIN__
2915 [ dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2916 cat > conftest.lit <<EOF
2917 0000 10000000 00000000 017a0001 781a0004 .........z..x...
2918 0010 01000000 12000000 18000000 00000000 ................
2919 0020 08000000 04080000 0044 .........D @&t@
2921 cat > conftest.big <<EOF
2922 0000 00000010 00000000 017a0001 781a0004 .........z..x...
2923 0010 00000001 00000012 00000018 00000000 ................
2924 0020 00000008 04000000 0844 .........D @&t@
2926 # If the assembler didn't choke, and we can objdump,
2927 # and we got the correct data, then succeed.
2928 # The text in the here-document typically retains its unix-style line
2929 # endings, while the output of objdump will use host line endings.
2930 # Therefore, use diff -b for the comparisons.
2931 if test x$gcc_cv_objdump != x \
2932 && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2933 | tail -3 > conftest.got \
2934 && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2935 || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2937 gcc_cv_as_eh_frame=yes
2938 elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2939 gcc_cv_as_eh_frame=buggy
2941 # Uh oh, what do we do now?
2942 gcc_cv_as_eh_frame=no
2945 if test $gcc_cv_as_eh_frame = buggy; then
2946 AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2947 [Define if your assembler mis-optimizes .eh_frame data.])
2950 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2951 [elf,2,12,0], [--fatal-warnings],
2952 [.section .rodata.str, "aMS", @progbits, 1])
2953 if test $gcc_cv_as_shf_merge = no; then
2954 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2955 [elf,2,12,0], [--fatal-warnings],
2956 [.section .rodata.str, "aMS", %progbits, 1])
2958 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2959 [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2960 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2962 gcc_GAS_CHECK_FEATURE([stabs directive], gcc_cv_as_stabs_directive, ,,
2963 [.stabs "gcc2_compiled.",60,0,0,0],,
2964 [AC_DEFINE(HAVE_AS_STABS_DIRECTIVE, 1,
2965 [Define if your assembler supports .stabs.])])
2967 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
2968 gcc_cv_as_comdat_group,
2969 [elf,2,16,0], [--fatal-warnings],
2970 [.section .text,"axG",@progbits,.foo,comdat])
2971 if test $gcc_cv_as_comdat_group = yes; then
2972 gcc_cv_as_comdat_group_percent=no
2973 gcc_cv_as_comdat_group_group=no
2975 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
2976 gcc_cv_as_comdat_group_percent,
2977 [elf,2,16,0], [--fatal-warnings],
2978 [.section .text,"axG",%progbits,.foo,comdat])
2979 if test $gcc_cv_as_comdat_group_percent = yes; then
2980 gcc_cv_as_comdat_group_group=no
2983 # Sun as uses a completely different syntax.
2988 .group foo,".text%foo",#comdat
2989 .section ".text%foo", #alloc,#execinstr,#progbits
2994 i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
2996 .group foo,.text%foo,#comdat
2997 .section .text%foo, "ax", @progbits
3003 gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
3004 gcc_cv_as_comdat_group_group,
3008 if test -z "${gcc_cv_as_comdat_group_group+set}"; then
3009 gcc_cv_as_comdat_group_group=no
3013 if test x"$ld_is_gold" = xyes; then
3015 elif test $in_tree_ld = yes ; then
3017 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3018 && test $in_tree_ld_is_elf = yes; then
3021 elif echo "$ld_ver" | grep GNU > /dev/null; then
3023 if test 0"$ld_date" -lt 20050308; then
3024 if test -n "$ld_date"; then
3025 # If there was date string, but was earlier than 2005-03-08, fail
3027 elif test "$ld_vers_major" -lt 2; then
3029 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
3036 *-*-solaris2.1[1-9]*)
3038 # Sun ld has COMDAT group support since Solaris 9, but it doesn't
3039 # interoperate with GNU as until Solaris 11 build 130, i.e. ld
3042 # If using Sun as for COMDAT group as emitted by GCC, one needs at
3043 # least ld version 1.2267.
3044 if test "$ld_vers_major" -gt 1; then
3046 elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
3048 elif test "$ld_vers_minor" -ge 2267; then
3053 # Assume linkers other than GNU ld don't support COMDAT group.
3059 # Allow overriding the automatic COMDAT group tests above.
3060 AC_ARG_ENABLE(comdat,
3061 [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
3062 [comdat_group="$enable_comdat"])
3063 if test $comdat_group = no; then
3064 gcc_cv_as_comdat_group=no
3065 gcc_cv_as_comdat_group_percent=no
3066 gcc_cv_as_comdat_group_group=no
3068 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
3069 [`if test $gcc_cv_as_comdat_group = yes \
3070 || test $gcc_cv_as_comdat_group_percent = yes \
3071 || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
3072 [Define 0/1 if your assembler and linker support COMDAT groups.])
3074 gcc_GAS_CHECK_FEATURE([line table discriminator support],
3075 gcc_cv_as_discriminator,
3079 .loc 1 1 0 discriminator 1],,
3080 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
3081 [Define if your assembler supports the .loc discriminator sub-directive.])])
3083 # Thread-local storage - the check is heavily parameterized.
3092 .section ".tdata","awT",@progbits
3095 ldq $27,__tls_get_addr($29) !literal!1
3096 lda $16,foo($29) !tlsgd!1
3097 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3098 ldq $27,__tls_get_addr($29) !literal!2
3099 lda $16,foo($29) !tlsldm!2
3100 jsr $26,($27),__tls_get_addr !lituse_tlsldm!2
3101 ldq $1,foo($29) !gotdtprel
3102 ldah $2,foo($29) !dtprelhi
3103 lda $3,foo($2) !dtprello
3104 lda $4,foo($29) !dtprel
3105 ldq $1,foo($29) !gottprel
3106 ldah $2,foo($29) !tprelhi
3107 lda $3,foo($2) !tprello
3108 lda $4,foo($29) !tprel'
3111 tls_as_opt=--fatal-warnings
3115 add_s r0,r0, @foo@tpoff'
3119 cris-*-*|crisv32-*-*)
3121 .section ".tdata","awT",@progbits
3128 tls_as_opt=--fatal-warnings
3132 .section ".tdata","awT",@progbits
3144 .section ".tdata","awT",@progbits
3148 addil LT%foo-$tls_gdidx$,gp
3149 ldo RT%foo-$tls_gdidx$(%r1),%arg0
3152 addil LT%foo-$tls_ldidx$,gp
3154 ldo RT%foo-$tls_ldidx$(%r1),%arg0
3155 addil LR%foo-$tls_dtpoff$,%ret0
3156 ldo RR%foo-$tls_dtpoff$(%r1),%t1
3158 addil LT%foo-$tls_ieoff$,gp
3159 ldw RT%foo-$tls_ieoff$(%r1),%t2
3162 addil LR%foo-$tls_leoff$,%t1
3163 ldo RR%foo-$tls_leoff$(%r1),%t2'
3166 tls_as_opt=--fatal-warnings
3170 .section ".tdata","awT",%progbits
3181 i[34567]86-*-* | x86_64-*-*)
3183 i[34567]86-*-solaris2.* | x86_64-*-solaris2.1[0-9]*)
3190 if test x$on_solaris = xyes && test x$gas_flag = xno; then
3192 .section .tdata,"awt",@progbits'
3197 AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
3198 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
3202 .section ".tdata","awT",@progbits'
3206 tls_as_opt="--fatal-warnings"
3210 conftest_s="$conftest_s
3214 leal foo@tlsgd(,%ebx,1), %eax
3215 leal foo@tlsldm(%ebx), %eax
3216 leal foo@dtpoff(%eax), %edx
3217 movl foo@gottpoff(%ebx), %eax
3218 subl foo@gottpoff(%ebx), %eax
3219 addl foo@gotntpoff(%ebx), %eax
3220 movl foo@indntpoff, %eax
3221 movl \$foo@tpoff, %eax
3222 subl \$foo@tpoff, %eax
3223 leal foo@ntpoff(%ecx), %eax"
3226 if test x$on_solaris = xyes; then
3228 yes) tls_as_opt="$tls_as_opt --64" ;;
3229 no) tls_as_opt="$tls_as_opt -xarch=amd64" ;;
3232 conftest_s="$conftest_s
3236 leaq foo@tlsgd(%rip), %rdi
3237 leaq foo@tlsld(%rip), %rdi
3238 leaq foo@dtpoff(%rax), %rdx
3239 movq foo@gottpoff(%rip), %rax
3240 movq \$foo@tpoff, %rax"
3246 .section ".tdata","awT",@progbits
3249 addl r16 = @ltoff(@dtpmod(foo#)), gp
3250 addl r17 = @ltoff(@dtprel(foo#)), gp
3251 addl r18 = @ltoff(@tprel(foo#)), gp
3252 addl r19 = @dtprel(foo#), gp
3253 adds r21 = @dtprel(foo#), r13
3254 movl r23 = @dtprel(foo#)
3255 addl r20 = @tprel(foo#), gp
3256 adds r22 = @tprel(foo#), r13
3257 movl r24 = @tprel(foo#)'
3260 tls_as_opt=--fatal-warnings
3264 .section .tdata,"awT",@progbits
3268 addik r5,r20,x@TLSGD
3269 addik r5,r20,x@TLSLDM'
3272 tls_as_opt='--fatal-warnings'
3276 .section .tdata,"awT",@progbits
3280 addiu $4, $28, %tlsgd(x)
3281 addiu $4, $28, %tlsldm(x)
3282 lui $4, %dtprel_hi(x)
3283 addiu $4, $4, %dtprel_lo(x)
3284 lw $4, %gottprel(x)($28)
3285 lui $4, %tprel_hi(x)
3286 addiu $4, $4, %tprel_lo(x)'
3289 tls_as_opt='-32 --fatal-warnings'
3293 .section .tdata,"awT",@progbits
3298 move.l x@TLSGD(%a5),%a0
3299 move.l x@TLSLDM(%a5),%a0
3300 move.l x@TLSLDO(%a5),%a0
3301 move.l x@TLSIE(%a5),%a0
3302 move.l x@TLSLE(%a5),%a0'
3305 tls_as_opt='--fatal-warnings'
3309 .section ".tdata","awT",@progbits'
3312 tls_as_opt="--fatal-warnings"
3316 .section ".tdata","awT",%progbits
3320 add x0, x0, #:tlsgd_lo12:x
3325 tls_as_opt='--fatal-warnings'
3329 .extern __get_tpointer
3347 .section ".tdata","awT",@progbits
3355 addi 3,2,ld0@got@tlsgd
3361 addi 3,2,x1@got@tlsld
3367 addis 9,3,x2@dtprel@ha
3368 addi 9,9,x2@dtprel@l
3371 ld 9,x3@got@dtprel(2)
3377 tls_as_opt="-a64 --fatal-warnings"
3381 .section ".tdata","awT",@progbits
3389 addi 3,31,ld0@got@tlsgd
3391 addi 3,31,x1@got@tlsld
3394 addis 9,3,x2@dtprel@ha
3395 addi 9,9,x2@dtprel@l
3396 lwz 9,x3@got@tprel(31)
3399 addis 9,2,x2@tprel@ha
3400 addi 9,9,x2@tprel@l'
3403 tls_as_opt="-a32 --fatal-warnings"
3407 .section ".tdata","awT",@progbits
3416 l %r1,foo@GOTNTPOFF(%r12)
3417 l %r1,0(%r1):tls_load:foo
3418 bas %r14,0(%r1,%r13):tls_gdcall:foo
3419 bas %r14,0(%r1,%r13):tls_ldcall:foo'
3422 tls_as_opt="-m31 --fatal-warnings"
3426 .section ".tdata","awT",@progbits
3434 lg %r1,foo@GOTNTPOFF(%r12)
3435 larl %r1,foo@INDNTPOFF
3436 brasl %r14,__tls_get_offset@PLT:tls_gdcall:foo
3437 brasl %r14,__tls_get_offset@PLT:tls_ldcall:foo'
3440 tls_as_opt="-m64 -Aesame --fatal-warnings"
3442 sh-*-* | sh[123456789lbe]*-*-*)
3444 .section ".tdata","awT",@progbits
3454 tls_as_opt=--fatal-warnings
3458 sparc*-sun-solaris2.*)
3465 if test x$on_solaris = xyes && test x$gas_flag = xno; then
3467 .section ".tdata",#alloc,#write,#tls'
3472 .section ".tdata","awT",@progbits'
3475 tls_as_opt="-32 --fatal-warnings"
3477 conftest_s="$conftest_s
3480 sethi %tgd_hi22(foo), %o0
3481 add %o0, %tgd_lo10(foo), %o1
3482 add %l7, %o1, %o0, %tgd_add(foo)
3483 call __tls_get_addr, %tgd_call(foo)
3484 sethi %tldm_hi22(foo), %l1
3485 add %l1, %tldm_lo10(foo), %l2
3486 add %l7, %l2, %o0, %tldm_add(foo)
3487 call __tls_get_addr, %tldm_call(foo)
3488 sethi %tldo_hix22(foo), %l3
3489 xor %l3, %tldo_lox10(foo), %l4
3490 add %o0, %l4, %l5, %tldo_add(foo)
3491 sethi %tie_hi22(foo), %o3
3492 add %o3, %tie_lo10(foo), %o3
3493 ld [%l7 + %o3], %o2, %tie_ld(foo)
3494 add %g7, %o2, %o4, %tie_add(foo)
3495 sethi %tle_hix22(foo), %l1
3496 xor %l1, %tle_lox10(foo), %o5
3497 ld [%g7 + %o5], %o1"
3501 .section ".tdata","awT",@progbits
3504 addli r0, zero, tls_gd(foo)
3505 auli r0, zero, tls_gd_ha16(foo)
3506 addli r0, r0, tls_gd_lo16(foo)
3508 addli r0, zero, tls_ie(foo)
3509 auli r0, r0, tls_ie_ha16(foo)
3510 addli r0, r0, tls_ie_lo16(foo)'
3513 tls_as_opt="--fatal-warnings"
3517 .section ".tdata","awT",@progbits
3520 shl16insli r0, zero, hw0_last_tls_gd(foo)
3521 shl16insli r0, zero, hw1_last_tls_gd(foo)
3522 shl16insli r0, r0, hw0_tls_gd(foo)
3524 shl16insli r0, zero, hw1_last_tls_ie(foo)
3525 shl16insli r0, r0, hw0_tls_ie(foo)'
3528 tls_as_opt="--fatal-warnings"
3532 .section ".tdata","awT",@progbits
3535 movi a8, foo@TLSFUNC
3536 movi a10, foo@TLSARG
3537 callx8.tls a8, foo@TLSCALL'
3544 if test "x$enable_tls" = xno ; then
3545 : # TLS explicitly disabled.
3546 elif test "x$enable_tls" = xyes ; then
3547 set_have_as_tls=yes # TLS explicitly enabled.
3548 elif test -z "$tls_first_major"; then
3549 : # If we don't have a check, assume no support.
3551 gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3552 [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3553 [set_have_as_tls=yes])
3555 if test $set_have_as_tls = yes ; then
3556 AC_DEFINE(HAVE_AS_TLS, 1,
3557 [Define if your assembler and linker support thread-local storage.])
3560 # Target-specific assembler checks.
3562 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3563 gcc_cv_ld_static_dynamic=no
3564 gcc_cv_ld_static_option='-Bstatic'
3565 gcc_cv_ld_dynamic_option='-Bdynamic'
3566 if test $in_tree_ld = yes ; then
3567 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3568 gcc_cv_ld_static_dynamic=yes
3570 elif test x$gcc_cv_ld != x; then
3571 # Check if linker supports -Bstatic/-Bdynamic option
3572 if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3573 && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3574 gcc_cv_ld_static_dynamic=yes
3577 # AIX ld uses -b flags
3578 *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
3579 gcc_cv_ld_static_dynamic=yes
3580 gcc_cv_ld_static_option="-bstatic"
3581 gcc_cv_ld_dynamic_option="-bdynamic"
3583 # HP-UX ld uses -a flags to select between shared and archive.
3585 if test x"$gnu_ld" = xno; then
3586 gcc_cv_ld_static_dynamic=yes
3587 gcc_cv_ld_static_option="-aarchive_shared"
3588 gcc_cv_ld_dynamic_option="-adefault"
3591 # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3593 gcc_cv_ld_static_dynamic=yes
3598 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3599 AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3600 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3601 AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3602 [Define to the linker option to disable use of shared objects.])
3603 AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3604 [Define to the linker option to enable use of shared objects.])
3606 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3608 if test x"$demangler_in_ld" = xyes; then
3609 AC_MSG_CHECKING(linker --demangle support)
3610 gcc_cv_ld_demangle=no
3611 if test $in_tree_ld = yes; then
3612 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3613 gcc_cv_ld_demangle=yes
3615 elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3616 # Check if the GNU linker supports --demangle option
3617 if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3618 gcc_cv_ld_demangle=yes
3621 if test x"$gcc_cv_ld_demangle" = xyes; then
3622 AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3623 [Define if your linker supports --demangle option.])
3625 AC_MSG_RESULT($gcc_cv_ld_demangle)
3628 AC_MSG_CHECKING(linker plugin support)
3630 if test -f liblto_plugin.la; then
3631 save_ld_ver="$ld_ver"
3632 save_ld_vers_major="$ld_vers_major"
3633 save_ld_vers_minor="$ld_vers_minor"
3634 save_ld_is_gold="$ld_is_gold"
3638 if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
3640 # FIXME: ld_is_gold?
3641 ld_vers_major="$gcc_cv_gld_major_version"
3642 ld_vers_minor="$gcc_cv_gld_minor_version"
3644 # Determine plugin linker version.
3645 # FIXME: Partial duplicate from above, generalize.
3647 ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
3648 if echo "$ld_ver" | grep GNU > /dev/null; then
3649 if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
3651 ld_vers=`echo $ld_ver | sed -n \
3652 -e 's,^[^)]*[ ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3654 ld_vers=`echo $ld_ver | sed -n \
3655 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3657 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3658 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3663 # Determine plugin support.
3664 if echo "$ld_ver" | grep GNU > /dev/null; then
3665 # Require GNU ld or gold 2.21+ for plugin support by default.
3666 if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
3668 # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
3669 elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
3674 ld_ver="$save_ld_ver"
3675 ld_vers_major="$save_ld_vers_major"
3676 ld_vers_minor="$save_ld_vers_minor"
3677 ld_is_gold="$save_ld_is_gold"
3679 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
3680 [Define to the level of your linker's plugin support.])
3681 AC_MSG_RESULT($gcc_cv_lto_plugin)
3685 gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,,
3686 [-mabi=lp64], [.text],,,)
3687 if test x$gcc_cv_as_aarch64_mabi = xyes; then
3688 AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
3689 [Define if your assembler supports the -mabi option.])
3691 if test x$with_abi = xilp32; then
3692 AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3693 Upgrade the Assembler.])
3695 if test x"$with_multilib_list" = xdefault; then
3696 TM_MULTILIB_CONFIG=lp64
3698 aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
3699 for aarch64_multilib in ${aarch64_multilibs}; do
3700 case ${aarch64_multilib} in
3702 AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3703 Upgrade the Assembler.])
3711 # Check if we have binutils support for relocations types needed by -fpic
3712 gcc_GAS_CHECK_FEATURE([-fpic relocs], gcc_cv_as_aarch64_picreloc,,,
3715 ldr x0, [[x2, #:gotpage_lo15:globalsym]]
3716 ],,[AC_DEFINE(HAVE_AS_SMALL_PIC_RELOCS, 1,
3717 [Define if your assembler supports relocs needed by -fpic.])])
3718 # Enable default workaround for AArch64 Cortex-A53 erratum 835769.
3719 AC_ARG_ENABLE(fix-cortex-a53-835769,
3721 AS_HELP_STRING([--enable-fix-cortex-a53-835769],
3722 [enable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3723 AS_HELP_STRING([--disable-fix-cortex-a53-835769],
3724 [disable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3729 tm_defines="${tm_defines} TARGET_FIX_ERR_A53_835769_DEFAULT=1"
3734 AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-835769.\
3735 Valid choices are 'yes' and 'no'.])
3741 # Enable default workaround for AArch64 Cortex-A53 erratum 843419.
3742 AC_ARG_ENABLE(fix-cortex-a53-843419,
3744 AS_HELP_STRING([--enable-fix-cortex-a53-843419],
3745 [enable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3746 AS_HELP_STRING([--disable-fix-cortex-a53-843419],
3747 [disable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3752 tm_defines="${tm_defines} TARGET_FIX_ERR_A53_843419_DEFAULT=1"
3757 AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-843419.\
3758 Valid choices are 'yes' and 'no'.])
3766 # All TARGET_ABI_OSF targets.
3767 alpha*-*-linux* | alpha*-*-*bsd*)
3768 gcc_GAS_CHECK_FEATURE([explicit relocation support],
3769 gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3772 extbl $3, $2, $3 !lituse_bytoff!1
3773 ldq $2, a($29) !literal!1
3774 ldq $4, b($29) !literal!2
3775 ldq_u $3, 0($2) !lituse_base!1
3776 ldq $27, f($29) !literal!5
3777 jsr $26, ($27), f !lituse_jsr!5
3778 ldah $29, 0($26) !gpdisp!3
3779 lda $0, c($29) !gprel
3780 ldah $1, d($29) !gprelhigh
3781 lda $1, d($1) !gprellow
3782 lda $29, 0($29) !gpdisp!3],,
3783 [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3784 [Define if your assembler supports explicit relocations.])])
3785 gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3786 gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3789 ldq $27, a($29) !literal!1
3790 jsr $26, ($27), a !lituse_jsrdirect!1],,
3791 [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3792 [Define if your assembler supports the lituse_jsrdirect relocation.])])
3796 gcc_GAS_CHECK_FEATURE([--mlink-relax option], gcc_cv_as_avr_mlink_relax,,
3797 [--mlink-relax], [.text],,
3798 [AC_DEFINE(HAVE_AS_AVR_MLINK_RELAX_OPTION, 1,
3799 [Define if your avr assembler supports --mlink-relax option.])])
3801 gcc_GAS_CHECK_FEATURE([-mrmw option], gcc_cv_as_avr_mrmw,,
3803 [AC_DEFINE(HAVE_AS_AVR_MRMW_OPTION, 1,
3804 [Define if your avr assembler supports -mrmw option.])])
3808 gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3809 gcc_cv_as_cris_no_mul_bug,[2,15,91],
3810 [-no-mul-bug-abort], [.text],,
3811 [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3812 [Define if your assembler supports the -no-mul-bug-abort option.])])
3816 gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3817 [.register %g2, #scratch],,
3818 [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3819 [Define if your assembler supports .register.])])
3821 gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3823 [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3824 [Define if your assembler supports -relax option.])])
3826 gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3827 gcc_cv_as_sparc_gotdata_op,,
3834 sethi %gdop_hix22(foo), %g1
3835 xor %g1, %gdop_lox10(foo), %g1
3836 ld [[%l7 + %g1]], %g2, %gdop(foo)],
3837 [if test x$gcc_cv_ld != x \
3838 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3839 if test x$gcc_cv_objdump != x; then
3840 if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3841 | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3842 gcc_cv_as_sparc_gotdata_op=no
3844 gcc_cv_as_sparc_gotdata_op=yes
3849 [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3850 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3852 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3853 gcc_cv_as_sparc_ua_pcrel,,
3861 .uaword %r_disp32(foo)],
3862 [if test x$gcc_cv_ld != x \
3863 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3864 gcc_cv_as_sparc_ua_pcrel=yes
3867 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3868 [Define if your assembler and linker support unaligned PC relative relocs.])
3870 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3871 gcc_cv_as_sparc_ua_pcrel_hidden,,
3876 .uaword %r_disp32(foo)
3877 .byte 0x32, 0x33, 0x34
3882 [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3883 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3884 && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3885 | grep ' 31000000 07323334' > /dev/null 2>&1; then
3886 if $gcc_cv_objdump -R conftest 2> /dev/null \
3887 | grep 'DISP32' > /dev/null 2>&1; then
3890 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3894 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3895 [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3896 ]) # unaligned pcrel relocs
3898 gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3899 gcc_cv_as_sparc_offsetable_lo10,,
3902 or %g1, %lo(ab) + 12, %g1
3903 or %g1, %lo(ab + 12), %g1],
3904 [if test x$gcc_cv_objdump != x \
3905 && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3906 | grep ' 82106000 82106000' > /dev/null 2>&1; then
3907 gcc_cv_as_sparc_offsetable_lo10=yes
3909 [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3910 [Define if your assembler supports offsetable %lo().])])
3912 gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
3913 gcc_cv_as_sparc_fmaf,,
3916 .register %g2, #scratch
3917 .register %g3, #scratch
3919 fmaddd %f0, %f2, %f4, %f6
3920 addxccc %g1, %g2, %g3
3921 fsrl32 %f2, %f4, %f8
3922 fnaddd %f10, %f12, %f14],,
3923 [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
3924 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
3926 gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
3927 gcc_cv_as_sparc_sparc4,,
3930 .register %g2, #scratch
3931 .register %g3, #scratch
3934 1: cwbneg %g2, %g3, 1f
3937 aes_kexpand0 %f4, %f6, %f8
3938 des_round %f38, %f40, %f42, %f44
3939 camellia_f %f54, %f56, %f58, %f60
3940 kasumi_fi_xor %f46, %f48, %f50, %f52],,
3941 [AC_DEFINE(HAVE_AS_SPARC4, 1,
3942 [Define if your assembler supports SPARC4 instructions.])])
3944 gcc_GAS_CHECK_FEATURE([SPARC5 and VIS 4.0 instructions],
3945 gcc_cv_as_sparc_sparc5,,
3948 .register %g2, #scratch
3949 .register %g3, #scratch
3952 fpadd8 %f0, %f2, %f4],,
3953 [AC_DEFINE(HAVE_AS_SPARC5_VIS4, 1,
3954 [Define if your assembler supports SPARC5 and VIS 4.0 instructions.])])
3956 gcc_GAS_CHECK_FEATURE([LEON instructions],
3957 gcc_cv_as_sparc_leon,,
3960 .register %g2, #scratch
3961 .register %g3, #scratch
3965 casa [[%g2]] 0xb, %g3, %g1],,
3966 [AC_DEFINE(HAVE_AS_LEON, 1,
3967 [Define if your assembler supports LEON instructions.])])
3971 i[34567]86-*-* | x86_64-*-*)
3975 # Full C++ conformance when using a shared libstdc++-v3 requires some
3976 # support from the Cygwin DLL, which in more recent versions exports
3977 # wrappers to aid in interposing and redirecting operators new, delete,
3978 # etc., as per n2800 #17.6.4.6 [replacement.functions]. Check if we
3979 # are configuring for a version of Cygwin that exports the wrappers.
3980 if test x$host = x$target && test x$host_cpu = xi686; then
3981 AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3983 # Can't check presence of libc functions during cross-compile, so
3984 # we just have to assume we're building for an up-to-date target.
3985 gcc_ac_cygwin_dll_wrappers=yes
3987 AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3988 [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3989 [Define if you want to generate code by default that assumes that the
3990 Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3993 cygwin* | pe | mingw32*)
3994 # Recent binutils allows the three-operand form of ".comm" on PE. This
3995 # definition is used unconditionally to initialise the default state of
3996 # the target option variable that governs usage of the feature.
3997 gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3998 [2,19,52],,[.comm foo,1,32])
3999 AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
4000 [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
4001 [Define if your assembler supports specifying the alignment
4002 of objects allocated using the GAS .comm command.])
4003 # Used for DWARF 2 in PE
4004 gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
4005 gcc_cv_as_ix86_pe_secrel32,
4011 [if test x$gcc_cv_ld != x \
4012 && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
4013 gcc_cv_as_ix86_pe_secrel32=yes
4016 [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
4017 [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
4018 # Test if the assembler supports the extended form of the .section
4019 # directive that specifies section alignment. LTO support uses this,
4020 # but normally only after installation, so we warn but don't fail the
4021 # configure if LTO is enabled but the assembler does not support it.
4022 gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
4023 [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
4024 if test x$gcc_cv_as_section_has_align != xyes; then
4025 case ",$enable_languages," in
4027 AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
4034 # Test if the assembler supports the section flag 'e' for specifying
4035 # an excluded section.
4036 gcc_GAS_CHECK_FEATURE([.section with e], gcc_cv_as_section_has_e,
4037 [2,22,51], [--fatal-warnings],
4040 AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
4041 [`if test $gcc_cv_as_section_has_e = yes; then echo 1; else echo 0; fi`],
4042 [Define if your assembler supports specifying the section flag e.])
4044 gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
4045 gcc_cv_as_ix86_filds,,,
4046 [filds (%ebp); fists (%ebp)],,
4047 [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
4048 [Define if your assembler uses filds and fists mnemonics.])])
4050 gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
4051 gcc_cv_as_ix86_fildq,,,
4052 [fildq (%ebp); fistpq (%ebp)],,
4053 [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
4054 [Define if your assembler uses fildq and fistq mnemonics.])])
4056 gcc_GAS_CHECK_FEATURE([cmov syntax],
4057 gcc_cv_as_ix86_cmov_sun_syntax,,,
4058 [cmovl.l %edx, %eax],,
4059 [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
4060 [Define if your assembler supports the Sun syntax for cmov.])])
4062 gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
4063 gcc_cv_as_ix86_ffreep,,,
4065 [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
4066 [Define if your assembler supports the ffreep mnemonic.])])
4068 gcc_GAS_CHECK_FEATURE([.quad directive],
4069 gcc_cv_as_ix86_quad,,,
4071 [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
4072 [Define if your assembler supports the .quad directive.])])
4074 gcc_GAS_CHECK_FEATURE([sahf mnemonic],
4075 gcc_cv_as_ix86_sahf,,,
4078 [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
4079 [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
4081 gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
4082 gcc_cv_as_ix86_interunit_movq,,,
4086 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
4087 [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
4088 [Define if your assembler supports interunit movq mnemonic.])
4090 gcc_GAS_CHECK_FEATURE([hle prefixes],
4091 gcc_cv_as_ix86_hle,,,
4092 [lock xacquire cmpxchg %esi, (%ecx)],,
4093 [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
4094 [Define if your assembler supports HLE prefixes.])])
4096 gcc_GAS_CHECK_FEATURE([swap suffix],
4097 gcc_cv_as_ix86_swap,,,
4098 [movl.s %esp, %ebp],,
4099 [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
4100 [Define if your assembler supports the swap suffix.])])
4102 gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
4103 gcc_cv_as_ix86_diff_sect_delta,,,
4111 [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
4112 [Define if your assembler supports the subtraction of symbols in different sections.])])
4114 gcc_GAS_CHECK_FEATURE([rep and lock prefix],
4115 gcc_cv_as_ix86_rep_lock_prefix,,,
4121 lock addl %edi, (%eax,%esi)
4122 lock orl $0, (%esp)],,
4123 [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
4124 [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
4126 gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
4127 gcc_cv_as_ix86_ud2,,,
4129 [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
4130 [Define if your assembler supports the 'ud2' mnemonic.])])
4132 # Enforce 32-bit output with gas and gld.
4133 if test x$gas = xyes; then
4134 as_ix86_gas_32_opt="--32"
4136 if echo "$ld_ver" | grep GNU > /dev/null; then
4137 if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
4138 ld_ix86_gld_32_opt="-melf_i386_sol2"
4140 ld_ix86_gld_32_opt="-melf_i386"
4144 gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
4145 gcc_cv_as_ix86_tlsgdplt,,
4146 [$as_ix86_gas_32_opt],
4147 [call tls_gd@tlsgdplt],
4148 [if test x$gcc_cv_ld != x \
4149 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4150 gcc_cv_as_ix86_tlsgdplt=yes
4153 [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
4154 [Define if your assembler and linker support @tlsgdplt.])])
4157 .section .tdata,"aw'$tls_section_flag'",@progbits
4159 .section .text,"ax",@progbits
4160 call tls_ld@tlsldmplt'
4162 gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
4163 gcc_cv_as_ix86_tlsldmplt,,
4164 [$as_ix86_gas_32_opt],
4166 [if test x$gcc_cv_ld != x \
4167 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4168 gcc_cv_as_ix86_tlsldmplt=yes
4171 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
4172 [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
4173 [Define to 1 if your assembler and linker support @tlsldmplt.])
4176 .section .text,"ax",@progbits
4178 .type _start, @function
4180 leal value@tlsldm(%ebx), %eax
4181 call ___tls_get_addr@plt
4183 .section .tdata,"aw'$tls_section_flag'",@progbits
4184 .type value, @object
4186 gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
4187 gcc_cv_as_ix86_tlsldm,,
4188 [$as_ix86_gas_32_opt],
4190 [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4191 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
4192 if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
4193 || dis conftest 2>/dev/null | grep nop > /dev/null; then
4194 gcc_cv_as_ix86_tlsldm=yes
4198 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
4199 [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
4200 [Define to 1 if your assembler and linker support @tlsldm.])
4211 gcc_GAS_CHECK_FEATURE([R_386_GOT32X reloc],
4212 gcc_cv_as_ix86_got32x,,
4213 [$as_ix86_gas_32_opt],
4215 [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4216 && test x$gcc_cv_readelf != x \
4217 && $gcc_cv_readelf --relocs --wide conftest.o 2>&1 \
4218 | grep R_386_GOT32X > /dev/null 2>&1 \
4219 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4220 if $gcc_cv_objdump -dw conftest 2>&1 \
4221 | grep 0xffffff > /dev/null 2>&1; then
4222 gcc_cv_as_ix86_got32x=no
4224 gcc_cv_as_ix86_got32x=yes
4228 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_GOT32X,
4229 [`if test x"$gcc_cv_as_ix86_got32x" = xyes; then echo 1; else echo 0; fi`],
4230 [Define 0/1 if your assembler and linker support @GOT.])
4232 gcc_GAS_CHECK_FEATURE([GOTOFF in data],
4233 gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
4234 [$as_ix86_gas_32_opt],
4240 AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
4241 [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
4242 [Define true if the assembler supports '.long foo@GOTOFF'.])
4245 .section .text,"ax",@progbits
4247 .type _start, @function
4249 leal ld@tlsldm(%ecx), %eax
4250 call *___tls_get_addr@GOT(%ecx)
4251 leal gd@tlsgd(%ecx), %eax
4252 call *___tls_get_addr@GOT(%ecx)
4254 .section .tdata,"aw'$tls_section_flag'",@progbits
4262 gcc_GAS_CHECK_FEATURE([calling ___tls_get_addr via GOT],
4263 gcc_cv_as_ix86_tls_get_addr_via_got,,
4264 [$as_ix86_gas_32_opt],
4266 [if test x$gcc_cv_ld != x \
4267 && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4268 gcc_cv_as_ix86_tls_get_addr_via_got=yes
4271 AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLS_GET_ADDR_GOT,
4272 [`if test x"$gcc_cv_as_ix86_tls_get_addr_via_got" = xyes; then echo 1; else echo 0; fi`],
4273 [Define 0/1 if your assembler and linker support calling ___tls_get_addr via GOT.])
4277 gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
4278 gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
4280 addl r15 = @ltoffx(x#), gp
4282 ld8.mov r16 = [[r15]], x#],,
4283 [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
4284 [Define if your assembler supports ltoffx and ldxmov relocations.])])
4292 gcc_GAS_CHECK_FEATURE([.machine directive support],
4293 gcc_cv_as_machine_directive,,,
4294 [ .machine ppc7400])
4295 if test x$gcc_cv_as_machine_directive != xyes; then
4296 echo "*** This target requires an assembler supporting \".machine\"" >&2
4297 echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
4298 test x$build = x$target && exit 1
4304 *-*-aix*) conftest_s=' .machine "pwr5"
4307 *-*-darwin*) conftest_s=' .text
4309 *) conftest_s=' .machine power4
4314 gcc_GAS_CHECK_FEATURE([mfcr field support],
4315 gcc_cv_as_powerpc_mfcrf, [2,14,0],,
4317 [AC_DEFINE(HAVE_AS_MFCRF, 1,
4318 [Define if your assembler supports mfcr field.])])
4321 *-*-aix*) conftest_s=' .machine "pwr5"
4324 *) conftest_s=' .machine power5
4329 gcc_GAS_CHECK_FEATURE([popcntb support],
4330 gcc_cv_as_powerpc_popcntb, [2,17,0],,
4332 [AC_DEFINE(HAVE_AS_POPCNTB, 1,
4333 [Define if your assembler supports popcntb field.])])
4336 *-*-aix*) conftest_s=' .machine "pwr5x"
4339 *) conftest_s=' .machine power5
4344 gcc_GAS_CHECK_FEATURE([fp round support],
4345 gcc_cv_as_powerpc_fprnd, [2,17,0],,
4347 [AC_DEFINE(HAVE_AS_FPRND, 1,
4348 [Define if your assembler supports fprnd.])])
4351 *-*-aix*) conftest_s=' .machine "pwr6"
4354 *) conftest_s=' .machine power6
4359 gcc_GAS_CHECK_FEATURE([move fp gpr support],
4360 gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
4362 [AC_DEFINE(HAVE_AS_MFPGPR, 1,
4363 [Define if your assembler supports mffgpr and mftgpr.])])
4366 *-*-aix*) conftest_s=' .csect .text[[PR]]
4368 addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
4372 addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
4373 *) conftest_s=' .text
4375 addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
4378 gcc_GAS_CHECK_FEATURE([rel16 relocs],
4379 gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
4381 [AC_DEFINE(HAVE_AS_REL16, 1,
4382 [Define if your assembler supports R_PPC_REL16 relocs.])])
4385 *-*-aix*) conftest_s=' .machine "pwr6"
4388 *) conftest_s=' .machine power6
4393 gcc_GAS_CHECK_FEATURE([compare bytes support],
4394 gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
4396 [AC_DEFINE(HAVE_AS_CMPB, 1,
4397 [Define if your assembler supports cmpb.])])
4400 *-*-aix*) conftest_s=' .machine "pwr6"
4403 *) conftest_s=' .machine power6
4408 gcc_GAS_CHECK_FEATURE([decimal float support],
4409 gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
4411 [AC_DEFINE(HAVE_AS_DFP, 1,
4412 [Define if your assembler supports DFP instructions.])])
4415 *-*-aix*) conftest_s=' .machine "pwr7"
4418 *) conftest_s=' .machine power7
4423 gcc_GAS_CHECK_FEATURE([vector-scalar support],
4424 gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
4426 [AC_DEFINE(HAVE_AS_VSX, 1,
4427 [Define if your assembler supports VSX instructions.])])
4430 *-*-aix*) conftest_s=' .machine "pwr7"
4433 *) conftest_s=' .machine power7
4438 gcc_GAS_CHECK_FEATURE([popcntd support],
4439 gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
4441 [AC_DEFINE(HAVE_AS_POPCNTD, 1,
4442 [Define if your assembler supports POPCNTD instructions.])])
4445 *-*-aix*) conftest_s=' .machine "pwr8"
4446 .csect .text[[PR]]';;
4447 *) conftest_s=' .machine power8
4451 gcc_GAS_CHECK_FEATURE([power8 support],
4452 gcc_cv_as_powerpc_power8, [2,19,2], -a32,
4454 [AC_DEFINE(HAVE_AS_POWER8, 1,
4455 [Define if your assembler supports POWER8 instructions.])])
4458 *-*-aix*) conftest_s=' .machine "pwr9"
4459 .csect .text[[PR]]';;
4460 *) conftest_s=' .machine power9
4464 gcc_GAS_CHECK_FEATURE([power9 support],
4465 gcc_cv_as_powerpc_power9, [2,19,2], -a32,
4467 [AC_DEFINE(HAVE_AS_POWER9, 1,
4468 [Define if your assembler supports POWER9 instructions.])])
4471 *-*-aix*) conftest_s=' .csect .text[[PR]]
4473 *) conftest_s=' .text
4477 gcc_GAS_CHECK_FEATURE([lwsync support],
4478 gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
4480 [AC_DEFINE(HAVE_AS_LWSYNC, 1,
4481 [Define if your assembler supports LWSYNC instructions.])])
4484 *-*-aix*) conftest_s=' .machine "476"
4487 *) conftest_s=' .machine "476"
4492 gcc_GAS_CHECK_FEATURE([data cache invalidate support],
4493 gcc_cv_as_powerpc_dci, [9,99,0], -a32,
4495 [AC_DEFINE(HAVE_AS_DCI, 1,
4496 [Define if your assembler supports the DCI/ICI instructions.])])
4498 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4499 gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
4500 [.gnu_attribute 4,1],,
4501 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4502 [Define if your assembler supports .gnu_attribute.])])
4504 gcc_GAS_CHECK_FEATURE([tls marker support],
4505 gcc_cv_as_powerpc_tls_markers, [2,20,0],,
4506 [ bl __tls_get_addr(x@tlsgd)],,
4507 [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
4508 [Define if your assembler supports arg info for __tls_get_addr.])])
4510 gcc_GAS_CHECK_FEATURE([prologue entry point marker support],
4511 gcc_cv_as_powerpc_entry_markers, [2,26,0],-a64 --fatal-warnings,
4512 [ .reloc .,R_PPC64_ENTRY; nop],,
4513 [AC_DEFINE(HAVE_AS_ENTRY_MARKERS, 1,
4514 [Define if your assembler supports the R_PPC64_ENTRY relocation.])])
4518 gcc_GAS_CHECK_FEATURE([AIX .ref support],
4519 gcc_cv_as_aix_ref, [2,21,0],,
4520 [ .csect stuff[[rw]]
4526 [AC_DEFINE(HAVE_AS_REF, 1,
4527 [Define if your assembler supports .ref])])
4529 gcc_GAS_CHECK_FEATURE([AIX DWARF location lists section support],
4530 gcc_cv_as_aix_dwloc, [2,21,0],,
4535 [AC_DEFINE(HAVE_XCOFF_DWARF_EXTRAS, 1,
4536 [Define if your assembler supports AIX debug frame section label reference.])])
4542 gcc_GAS_CHECK_FEATURE([explicit relocation support],
4543 gcc_cv_as_mips_explicit_relocs, [2,14,0],,
4544 [ lw $4,%gp_rel(foo)($4)],,
4545 [if test x$target_cpu_default = x
4546 then target_cpu_default=MASK_EXPLICIT_RELOCS
4547 else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
4550 gcc_GAS_CHECK_FEATURE([-mno-shared support],
4551 gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
4552 [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
4553 [Define if the assembler understands -mno-shared.])])
4555 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4556 gcc_cv_as_mips_gnu_attribute, [2,18,0],,
4557 [.gnu_attribute 4,1],,
4558 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4559 [Define if your assembler supports .gnu_attribute.])])
4561 gcc_GAS_CHECK_FEATURE([.module support],
4562 gcc_cv_as_mips_dot_module,,[-32],
4565 [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
4566 [Define if your assembler supports .module.])])
4567 if test x$gcc_cv_as_mips_dot_module = xno \
4568 && test x$with_fp_32 != x; then
4570 [Requesting --with-fp-32= requires assembler support for .module.])
4573 gcc_GAS_CHECK_FEATURE([.micromips support],
4574 gcc_cv_as_micromips_support,,[--fatal-warnings],
4576 [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
4577 [Define if your assembler supports the .set micromips directive])])
4579 gcc_GAS_CHECK_FEATURE([.dtprelword support],
4580 gcc_cv_as_mips_dtprelword, [2,18,0],,
4581 [.section .tdata,"awT",@progbits
4585 .dtprelword x+0x8000],,
4586 [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
4587 [Define if your assembler supports .dtprelword.])])
4589 gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
4590 gcc_cv_as_mips_dspr1_mult,,,
4600 [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
4601 [Define if your assembler supports DSPR1 mult.])])
4603 AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
4604 gcc_cv_as_ld_jalr_reloc=no
4605 if test $gcc_cv_as_mips_explicit_relocs = yes; then
4606 if test $in_tree_ld = yes ; then
4607 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
4608 && test $in_tree_ld_is_elf = yes; then
4609 gcc_cv_as_ld_jalr_reloc=yes
4611 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
4612 echo ' .ent x' > conftest.s
4613 echo 'x: lw $2,%got_disp(y)($3)' >> conftest.s
4614 echo ' lw $25,%call16(y)($28)' >> conftest.s
4615 echo ' .reloc 1f,R_MIPS_JALR,y' >> conftest.s
4616 echo '1: jalr $25' >> conftest.s
4617 echo ' .reloc 1f,R_MIPS_JALR,x' >> conftest.s
4618 echo '1: jalr $25' >> conftest.s
4619 echo ' .end x' >> conftest.s
4620 if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
4621 && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
4622 if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
4623 && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
4624 gcc_cv_as_ld_jalr_reloc=yes
4630 if test $gcc_cv_as_ld_jalr_reloc = yes; then
4631 if test x$target_cpu_default = x; then
4632 target_cpu_default=MASK_RELAX_PIC_CALLS
4634 target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
4637 AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
4639 AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
4640 [gcc_cv_ld_mips_personality_relaxation],
4641 [gcc_cv_ld_mips_personality_relaxation=no
4642 if test $in_tree_ld = yes ; then
4643 if test "$gcc_cv_gld_major_version" -eq 2 \
4644 -a "$gcc_cv_gld_minor_version" -ge 21 \
4645 -o "$gcc_cv_gld_major_version" -gt 2; then
4646 gcc_cv_ld_mips_personality_relaxation=yes
4648 elif test x$gcc_cv_as != x \
4649 -a x$gcc_cv_ld != x \
4650 -a x$gcc_cv_readelf != x ; then
4651 cat > conftest.s <<EOF
4653 .cfi_personality 0x80,indirect_ptr
4660 .section .data,"aw",@progbits
4664 if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
4665 && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
4666 if $gcc_cv_readelf -d conftest 2>&1 \
4667 | grep TEXTREL > /dev/null 2>&1; then
4669 elif $gcc_cv_readelf --relocs conftest 2>&1 \
4670 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
4673 gcc_cv_ld_mips_personality_relaxation=yes
4677 rm -f conftest.s conftest.o conftest])
4678 if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
4679 AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
4680 [Define if your linker can relax absolute .eh_frame personality
4681 pointers into PC-relative form.])
4684 gcc_GAS_CHECK_FEATURE([-mnan= support],
4685 gcc_cv_as_mips_nan,,
4687 [AC_DEFINE(HAVE_AS_NAN, 1,
4688 [Define if the assembler understands -mnan=.])])
4689 if test x$gcc_cv_as_mips_nan = xno \
4690 && test x$with_nan != x; then
4692 [Requesting --with-nan= requires assembler support for -mnan=])
4696 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4697 gcc_cv_as_s390_gnu_attribute, [2,18,0],,
4698 [.gnu_attribute 8,1],,
4699 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4700 [Define if your assembler supports .gnu_attribute.])])
4701 gcc_GAS_CHECK_FEATURE([.machine and .machinemode support],
4702 gcc_cv_as_s390_machine_machinemode, [2,24,0],,
4707 [AC_DEFINE(HAVE_AS_MACHINE_MACHINEMODE, 1,
4708 [Define if your assembler supports .machine and .machinemode.])])
4709 gcc_GAS_CHECK_FEATURE([architecture modifiers support],
4710 gcc_cv_as_s390_architecture_modifiers, [2,26,0],,
4711 [ .machine z13+vx ],,
4712 [AC_DEFINE(HAVE_AS_ARCHITECTURE_MODIFIERS, 1,
4713 [Define if your assembler supports architecture modifiers.])])
4717 # Mips and HP-UX need the GNU assembler.
4718 # Linux on IA64 might be able to use the Intel assembler.
4721 mips*-*-* | *-*-hpux* )
4722 if test x$gas_flag = xyes \
4723 || test x"$host" != x"$build" \
4724 || test ! -x "$gcc_cv_as" \
4725 || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
4728 echo "*** This configuration requires the GNU assembler" >&2
4734 # ??? Not all targets support dwarf2 debug_line, even within a version
4735 # of gas. Moreover, we need to emit a valid instruction to trigger any
4736 # info to the output file. So, as supported targets are added to gas 2.11,
4737 # add some instruction here to (also) show we expect this might work.
4738 # ??? Once 2.11 is released, probably need to add first known working
4739 # version to the per-target configury.
4741 aarch64 | alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze \
4742 | mips | nios2 | pa | rs6000 | score | sparc | spu | tilegx | tilepro \
4743 | visium | xstormy16 | xtensa)
4753 if test x"$insn" != x; then
4755 .file 1 \"conftest.s\"
4758 gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
4759 gcc_cv_as_dwarf2_debug_line,
4760 [elf,2,11,0],, [$conftest_s],
4761 [if test x$gcc_cv_objdump != x \
4762 && $gcc_cv_objdump -h conftest.o 2> /dev/null \
4763 | grep debug_line > /dev/null 2>&1; then
4764 gcc_cv_as_dwarf2_debug_line=yes
4767 # The .debug_line file table must be in the exact order that
4768 # we specified the files, since these indices are also used
4769 # by DW_AT_decl_file. Approximate this test by testing if
4770 # the assembler bitches if the same index is assigned twice.
4771 gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
4772 gcc_cv_as_dwarf2_file_buggy,,,
4776 if test $gcc_cv_as_dwarf2_debug_line = yes \
4777 && test $gcc_cv_as_dwarf2_file_buggy = no; then
4778 AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
4779 [Define if your assembler supports dwarf2 .file/.loc directives,
4780 and preserves file table indices exactly as given.])
4783 gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
4784 gcc_cv_as_gdwarf2_flag,
4785 [elf,2,11,0], [--gdwarf2], [$insn],,
4786 [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
4787 [Define if your assembler supports the --gdwarf2 option.])])
4789 gcc_GAS_CHECK_FEATURE([--gstabs option],
4790 gcc_cv_as_gstabs_flag,
4791 [elf,2,11,0], [--gstabs], [$insn],,
4792 [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
4793 [Define if your assembler supports the --gstabs option.])])
4795 gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
4796 gcc_cv_as_debug_prefix_map_flag,
4797 [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
4798 [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
4799 [Define if your assembler supports the --debug-prefix-map option.])])
4802 gcc_GAS_CHECK_FEATURE([compressed debug sections],
4803 gcc_cv_as_compress_debug,,,,
4804 [# gas compiled without zlib cannot compress debug sections and warns
4805 # about it, but still exits successfully. So check for this, too.
4806 if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
4808 gcc_cv_as_compress_debug=0
4809 # Since binutils 2.26, gas supports --compress-debug-sections=type,
4810 # defaulting to the ELF gABI format.
4811 elif $gcc_cv_as --compress-debug-sections=zlib-gnu -o conftest.o conftest.s > /dev/null 2>&1
4813 gcc_cv_as_compress_debug=2
4814 gcc_cv_as_compress_debug_option="--compress-debug-sections"
4815 gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4816 # Before binutils 2.26, gas only supported --compress-debug-options and
4817 # emitted the traditional GNU format.
4818 elif $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s > /dev/null 2>&1
4820 gcc_cv_as_compress_debug=1
4821 gcc_cv_as_compress_debug_option="--compress-debug-sections"
4822 gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4824 gcc_cv_as_compress_debug=0
4826 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
4827 [Define to the level of your assembler's compressed debug section support.])
4828 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
4829 [Define to the assembler option to enable compressed debug sections.])
4830 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
4831 [Define to the assembler option to disable compressed debug sections.])
4833 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
4836 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
4837 [Define if your assembler supports .lcomm with an alignment field.])])
4839 if test x$with_sysroot = x && test x$host = x$target \
4840 && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4841 && test "$prefix" != "NONE"; then
4842 AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4843 [Define to PREFIX/include if cpp should also search that directory.])
4846 # Determine the version of glibc, if any, used on the target.
4847 AC_MSG_CHECKING([for target glibc version])
4848 AC_ARG_WITH([glibc-version],
4849 [AS_HELP_STRING([--with-glibc-version=M.N],
4850 [assume GCC used with glibc version M.N or later])], [
4851 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
4852 glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
4853 glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
4855 AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
4857 glibc_version_major=0
4858 glibc_version_minor=0
4859 [if test -f $target_header_dir/features.h \
4860 && glibc_version_major_define=`$EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+[0-9]' $target_header_dir/features.h` \
4861 && glibc_version_minor_define=`$EGREP '^[ ]*#[ ]*define[ ]+__GLIBC_MINOR__[ ]+[0-9]' $target_header_dir/features.h`; then
4862 glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[ ]*//'`
4863 glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[ ]*//'`
4865 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
4866 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MAJOR], [$glibc_version_major],
4867 [GNU C Library major version number used on the target, or 0.])
4868 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MINOR], [$glibc_version_minor],
4869 [GNU C Library minor version number used on the target, or 0.])
4871 AC_ARG_ENABLE(gnu-unique-object,
4872 [AS_HELP_STRING([--enable-gnu-unique-object],
4873 [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
4874 [case $enable_gnu_unique_object in
4876 *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
4877 Valid choices are 'yes' and 'no'.]) ;;
4879 [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
4881 [.type foo, '$target_type_format_char'gnu_unique_object],,
4882 # We need to unquote above to to use the definition from config.gcc.
4883 # Also check for ld.so support, i.e. glibc 2.11 or higher.
4884 [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
4886 if test x$enable_gnu_unique_object = xyes; then
4887 AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
4888 [Define if your assembler supports @gnu_unique_object.])
4891 AC_CACHE_CHECK([assembler for tolerance to line number 0],
4892 [gcc_cv_as_line_zero],
4893 [gcc_cv_as_line_zero=no
4894 if test $in_tree_gas = yes; then
4895 gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
4896 elif test "x$gcc_cv_as" != x; then
4897 { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
4898 if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
4899 test "x`cat conftest.out`" = x
4901 gcc_cv_as_line_zero=yes
4903 echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
4904 cat conftest.s >&AS_MESSAGE_LOG_FD
4905 echo "configure: error output was" >&AS_MESSAGE_LOG_FD
4906 cat conftest.out >&AS_MESSAGE_LOG_FD
4908 rm -f conftest.o conftest.s conftest.out
4910 if test "x$gcc_cv_as_line_zero" = xyes; then
4911 AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
4912 [Define if the assembler won't complain about a line such as # 0 "" 2.])
4915 AC_MSG_CHECKING(support for thin archives)
4916 thin_archive_support=no
4917 echo 'int main (void) { return 0; }' > conftest.c
4918 if ($AR --version | sed 1q | grep "GNU ar" \
4919 && $CC $CFLAGS -c conftest.c \
4920 && $AR rcT conftest.a conftest.o \
4921 && $CC $CFLAGS $LDFLAGS -o conftest conftest.a) >/dev/null 2>&1; then
4922 thin_archive_support=yes
4924 rm -f conftest.c conftest.o conftest.a conftest
4925 AC_MSG_RESULT($thin_archive_support)
4926 AC_SUBST(thin_archive_support)
4928 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
4929 gcc_cv_ld_eh_frame_hdr=no
4930 if test $in_tree_ld = yes ; then
4931 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
4932 && test $in_tree_ld_is_elf = yes; then
4933 gcc_cv_ld_eh_frame_hdr=yes
4935 elif test x$gcc_cv_ld != x; then
4936 if echo "$ld_ver" | grep GNU > /dev/null; then
4937 # Check if linker supports --eh-frame-hdr option
4938 if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
4939 gcc_cv_ld_eh_frame_hdr=yes
4944 # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
4945 if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
4946 gcc_cv_ld_eh_frame_hdr=yes
4952 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
4953 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
4954 AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
4955 [Define if your linker supports .eh_frame_hdr.])
4957 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
4959 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
4960 gcc_cv_ld_eh_frame_ciev3=no
4961 if test $in_tree_ld = yes ; then
4962 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4963 && test $in_tree_ld_is_elf = yes; then
4964 gcc_cv_ld_eh_frame_ciev3=yes
4966 elif test x$gcc_cv_ld != x; then
4967 if echo "$ld_ver" | grep GNU > /dev/null; then
4968 gcc_cv_ld_eh_frame_ciev3=yes
4969 if test 0"$ld_date" -lt 20040513; then
4970 if test -n "$ld_date"; then
4971 # If there was date string, but was earlier than 2004-05-13, fail
4972 gcc_cv_ld_eh_frame_ciev3=no
4973 elif test "$ld_vers_major" -lt 2; then
4974 gcc_cv_ld_eh_frame_ciev3=no
4975 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
4976 gcc_cv_ld_eh_frame_ciev3=no
4982 # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
4983 if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
4984 gcc_cv_ld_eh_frame_ciev3=yes
4990 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
4991 [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
4992 [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
4993 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
4995 AC_MSG_CHECKING(linker position independent executable support)
4997 if test $in_tree_ld = yes ; then
4999 # Full PIE support on Solaris was only introduced in gld 2.26.
5000 *-*-solaris2*) gcc_gld_pie_min_version=26 ;;
5001 *) gcc_gld_pie_min_version=15 ;;
5003 if test "$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 \
5004 && test $in_tree_ld_is_elf = yes; then
5007 elif test x$gcc_cv_ld != x; then
5008 # Check if linker supports -pie option
5009 if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
5013 if echo "$ld_ver" | grep GNU > /dev/null \
5014 && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5021 *-*-solaris2.1[[1-9]]*)
5022 # Solaris 11.x and Solaris 12 added PIE support.
5023 if $gcc_cv_ld -z help 2>&1 | grep -- type.*pie > /dev/null; then
5030 if test x"$gcc_cv_ld_pie" = xyes; then
5031 AC_DEFINE(HAVE_LD_PIE, 1,
5032 [Define if your linker supports PIE option.])
5034 AC_MSG_RESULT($gcc_cv_ld_pie)
5036 AC_MSG_CHECKING(linker PIE support with copy reloc)
5037 gcc_cv_ld_pie_copyreloc=no
5038 if test $gcc_cv_ld_pie = yes ; then
5039 if test $in_tree_ld = yes ; then
5040 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
5041 gcc_cv_ld_pie_copyreloc=yes
5043 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5044 # Check if linker supports -pie option with copy reloc
5046 i?86-*-linux* | x86_64-*-linux*)
5047 cat > conftest1.s <<EOF
5050 .type a_glob, @object
5055 cat > conftest2.s <<EOF
5058 .type main, @function
5060 movl %eax, a_glob(%rip)
5063 .section .data.rel,"aw",@progbits
5068 if $gcc_cv_as --64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5069 && $gcc_cv_ld -shared -melf_x86_64 -o conftest1.so conftest1.o > /dev/null 2>&1 \
5070 && $gcc_cv_as --64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5071 && $gcc_cv_ld -pie -melf_x86_64 -o conftest conftest2.o conftest1.so > /dev/null 2>&1; then
5072 gcc_cv_ld_pie_copyreloc=yes
5074 rm -f conftest conftest1.so conftest1.o conftest2.o conftest1.s conftest2.s
5079 AC_DEFINE_UNQUOTED(HAVE_LD_PIE_COPYRELOC,
5080 [`if test x"$gcc_cv_ld_pie_copyreloc" = xyes; then echo 1; else echo 0; fi`],
5081 [Define 0/1 if your linker supports -pie option with copy reloc.])
5082 AC_MSG_RESULT($gcc_cv_ld_pie_copyreloc)
5084 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
5085 gcc_cv_ld_eh_gc_sections=no
5086 if test $in_tree_ld = yes ; then
5087 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
5088 && test $in_tree_ld_is_elf = yes; then
5089 gcc_cv_ld_eh_gc_sections=yes
5091 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
5092 cat > conftest.s <<EOF
5095 .type _start, @function
5098 .size _start, .-_start
5099 .section .text.foo,"ax",@progbits
5100 .type foo, @function
5104 .section .gcc_except_table.foo,"a",@progbits
5107 .section .eh_frame,"a",@progbits
5110 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5111 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5112 | grep "gc-sections option ignored" > /dev/null; then
5113 gcc_cv_ld_eh_gc_sections=no
5114 elif $gcc_cv_objdump -h conftest 2> /dev/null \
5115 | grep gcc_except_table > /dev/null; then
5116 gcc_cv_ld_eh_gc_sections=yes
5117 # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
5118 if test x$gcc_cv_as_comdat_group != xyes; then
5119 gcc_cv_ld_eh_gc_sections=no
5120 cat > conftest.s <<EOF
5123 .type _start, @function
5126 .size _start, .-_start
5127 .section .gnu.linkonce.t.foo,"ax",@progbits
5128 .type foo, @function
5132 .section .gcc_except_table.foo,"a",@progbits
5135 .section .eh_frame,"a",@progbits
5138 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5139 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5140 | grep "gc-sections option ignored" > /dev/null; then
5141 gcc_cv_ld_eh_gc_sections=no
5142 elif $gcc_cv_objdump -h conftest 2> /dev/null \
5143 | grep gcc_except_table > /dev/null; then
5144 gcc_cv_ld_eh_gc_sections=yes
5150 rm -f conftest.s conftest.o conftest
5154 # ??? This apparently exposes a binutils bug with PC-relative relocations.
5155 gcc_cv_ld_eh_gc_sections=no
5158 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
5159 AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
5160 [Define if your linker supports garbage collection of
5161 sections in presence of EH frames.])
5163 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
5165 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
5166 gcc_cv_ld_eh_gc_sections_bug=no
5167 if test $in_tree_ld = yes ; then
5168 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
5169 && test $in_tree_ld_is_elf = yes; then
5170 gcc_cv_ld_eh_gc_sections_bug=yes
5172 elif test x$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
5173 gcc_cv_ld_eh_gc_sections_bug=yes
5174 cat > conftest.s <<EOF
5177 .type _start, @function
5180 .size _start, .-_start
5181 .section .text.startup.foo,"ax",@progbits
5182 .type foo, @function
5186 .section .gcc_except_table.foo,"a",@progbits
5189 .section .eh_frame,"a",@progbits
5192 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5193 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5194 | grep "gc-sections option ignored" > /dev/null; then
5196 elif $gcc_cv_objdump -h conftest 2> /dev/null \
5197 | grep gcc_except_table > /dev/null; then
5198 gcc_cv_ld_eh_gc_sections_bug=no
5201 rm -f conftest.s conftest.o conftest
5203 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
5204 AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
5205 [Define if your linker has buggy garbage collection of
5206 sections support when .text.startup.foo like sections are used.])
5208 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
5210 AC_MSG_CHECKING(linker for compressed debug sections)
5211 # gold/gld support compressed debug sections since binutils 2.19/2.21
5212 # In binutils 2.26, gld gained support for the ELF gABI format.
5213 if test $in_tree_ld = yes ; then
5214 gcc_cv_ld_compress_debug=0
5215 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 19 -o "$gcc_cv_gld_major_version" -gt 2 \
5216 && test $in_tree_ld_is_elf = yes && test $ld_is_gold = yes; then
5217 gcc_cv_ld_compress_debug=2
5218 gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5219 elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 26 -o "$gcc_cv_gld_major_version" -gt 2 \
5220 && test $in_tree_ld_is_elf = yes && test $ld_is_gold = no; then
5221 gcc_cv_ld_compress_debug=3
5222 gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5223 elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2 \
5224 && test $in_tree_ld_is_elf = yes; then
5225 gcc_cv_ld_compress_debug=1
5227 elif echo "$ld_ver" | grep GNU > /dev/null; then
5228 if test "$ld_vers_major" -lt 2 \
5229 || test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 21; then
5230 gcc_cv_ld_compress_debug=0
5231 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5232 gcc_cv_ld_compress_debug=1
5234 gcc_cv_ld_compress_debug=3
5235 gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5237 if test $ld_is_gold = yes; then
5238 gcc_cv_ld_compress_debug=2
5239 gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5245 # Introduced in Solaris 11.2.
5246 if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
5247 gcc_cv_ld_compress_debug=3
5248 gcc_cv_ld_compress_debug_option="-z compress-sections"
5250 gcc_cv_ld_compress_debug=0
5254 # Assume linkers other than GNU ld don't support compessed debug
5256 gcc_cv_ld_compress_debug=0
5261 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
5262 [Define to the level of your linker's compressed debug section support.])
5263 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
5264 [Define to the linker option to enable compressed debug sections.])
5265 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
5271 AC_CACHE_CHECK(linker --as-needed support,
5272 gcc_cv_ld_as_needed,
5273 [gcc_cv_ld_as_needed=no
5274 gcc_cv_ld_as_needed_option='--as-needed'
5275 gcc_cv_ld_no_as_needed_option='--no-as-needed'
5276 if test $in_tree_ld = yes ; then
5277 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5278 && test $in_tree_ld_is_elf = yes; then
5279 gcc_cv_ld_as_needed=yes
5281 elif test x$gcc_cv_ld != x; then
5282 # Check if linker supports --as-needed and --no-as-needed options
5283 if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
5284 gcc_cv_ld_as_needed=yes
5287 # Solaris 2 ld always supports -z ignore/-z record.
5289 gcc_cv_ld_as_needed=yes
5290 gcc_cv_ld_as_needed_option="-z ignore"
5291 gcc_cv_ld_no_as_needed_option="-z record"
5296 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
5297 # dl_iterate_phdr, i.e. since Solaris 11.
5299 *-*-solaris2.1[[1-9]]*)
5301 i?86-*-* | x86_64-*-*)
5302 if echo "$ld_ver" | grep GNU > /dev/null; then
5303 # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
5304 gcc_cv_ld_as_needed=no
5310 gcc_cv_ld_as_needed=no
5314 if test x"$gcc_cv_ld_as_needed" = xyes; then
5315 AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
5316 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
5317 AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
5318 [Define to the linker option to ignore unused dependencies.])
5319 AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
5320 [Define to the linker option to keep unused dependencies.])
5323 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
5324 saved_LDFLAGS="$LDFLAGS"
5325 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
5326 LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
5327 AC_LINK_IFELSE([int main(void) {return 0;}],
5328 [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
5330 LDFLAGS="$saved_LDFLAGS"
5331 if test "x$gcc_cv_ld_clearcap" = xyes; then
5332 AC_DEFINE([HAVE_LD_CLEARCAP], 1,
5333 [Define if the linker supports clearing hardware capabilities via mapfile.])
5334 AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
5336 AC_MSG_RESULT($gcc_cv_ld_clearcap)
5342 emul_name="-melf32lppc"
5345 emul_name="-melf32ppc"
5348 AC_CACHE_CHECK(linker .gnu.attributes long double support,
5350 [gcc_cv_ld_ppc_attr=no
5351 if test x"$ld_is_gold" = xyes; then
5352 gcc_cv_ld_ppc_attr=yes
5353 elif test $in_tree_ld = yes ; then
5354 if test "$gcc_cv_gld_major_version" -eq 2 \
5355 -a "$gcc_cv_gld_minor_version" -ge 28 \
5356 -o "$gcc_cv_gld_major_version" -gt 2; then
5357 gcc_cv_ld_ppc_attr=yes
5359 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5360 # check that merging the long double .gnu_attribute doesn't warn
5361 cat > conftest1.s <<EOF
5364 cat > conftest2.s <<EOF
5367 if $gcc_cv_as -a32 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5368 && $gcc_cv_as -a32 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5369 && $gcc_cv_ld $emul_name -r -o conftest.o conftest1.o conftest2.o > /dev/null 2> conftest.err \
5370 && test ! -s conftest.err; then
5371 gcc_cv_ld_ppc_attr=yes
5373 rm -f conftest.err conftest.o conftest1.o conftest2.o conftest1.s conftest2.s
5376 if test x$gcc_cv_ld_ppc_attr = xyes; then
5377 AC_DEFINE(HAVE_LD_PPC_GNU_ATTR_LONG_DOUBLE, 1,
5378 [Define if your PowerPC linker has .gnu.attributes long double support.])
5383 case "$target:$tm_file" in
5384 powerpc64-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
5387 emul_name="-melf64lppc"
5390 emul_name="-melf64ppc"
5393 emul_name="-melf64ppc_fbsd"
5396 AC_CACHE_CHECK(linker support for omitting dot symbols,
5397 gcc_cv_ld_no_dot_syms,
5398 [gcc_cv_ld_no_dot_syms=no
5399 if test x"$ld_is_gold" = xyes; then
5400 gcc_cv_ld_no_dot_syms=yes
5401 elif test $in_tree_ld = yes ; then
5402 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
5403 gcc_cv_ld_no_dot_syms=yes
5405 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5406 cat > conftest1.s <<EOF
5410 cat > conftest2.s <<EOF
5411 .section ".opd","aw"
5416 .quad .LEfoo,.TOC.@tocbase,0
5422 if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5423 && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5424 && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
5425 gcc_cv_ld_no_dot_syms=yes
5427 rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
5430 if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
5431 AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
5432 [Define if your PowerPC64 linker only needs function descriptor syms.])
5435 AC_CACHE_CHECK(linker large toc support,
5436 gcc_cv_ld_large_toc,
5437 [gcc_cv_ld_large_toc=no
5438 if test x"$ld_is_gold" = xyes; then
5439 gcc_cv_ld_large_toc=yes
5440 elif test $in_tree_ld = yes ; then
5441 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
5442 gcc_cv_ld_large_toc=yes
5444 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5445 cat > conftest.s <<EOF
5446 .section ".tbss","awT",@nobits
5452 addis 9,13,ie0@got@tprel@ha
5453 ld 9,ie0@got@tprel@l(9)
5455 if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5456 && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
5457 gcc_cv_ld_large_toc=yes
5459 rm -f conftest conftest.o conftest.s
5462 if test x"$gcc_cv_ld_large_toc" = xyes; then
5463 AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5464 [Define if your PowerPC64 linker supports a large TOC.])
5467 AC_CACHE_CHECK(linker toc pointer alignment,
5468 gcc_cv_ld_toc_align,
5469 [if test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_nm != x; then
5470 cat > conftest.s <<EOF
5475 .section .data.rel.ro,"aw",@progbits
5480 if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5481 && $gcc_cv_ld $emul_name -z norelro -o conftest conftest.o > /dev/null 2>&1; then
5482 gcc_cv_ld_toc_align=`$gcc_cv_nm conftest | ${AWK} '/\.TOC\./ { match ($0, "0[[[:xdigit:]]]*", a); print strtonum ("0x" substr(a[[0]], length(a[[0]])-3)) }'`
5484 rm -f conftest conftest.o conftest.s
5487 if test -n "$gcc_cv_ld_toc_align" && test $gcc_cv_ld_toc_align -gt 8; then
5488 AC_DEFINE_UNQUOTED(POWERPC64_TOC_POINTER_ALIGNMENT, $gcc_cv_ld_toc_align,
5489 [Define to .TOC. alignment forced by your linker.])
5496 AC_CACHE_CHECK(linker large toc support,
5497 gcc_cv_ld_large_toc,
5498 [gcc_cv_ld_large_toc=no
5499 if test x$gcc_cv_as != x ; then
5500 cat > conftest.s <<EOF
5510 if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
5511 gcc_cv_ld_large_toc=yes
5513 rm -f conftest conftest.o conftest.s
5516 if test x"$gcc_cv_ld_large_toc" = xyes; then
5517 AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5518 [Define if your PowerPC64 linker supports a large TOC.])
5523 AC_CACHE_CHECK(linker --build-id support,
5525 [gcc_cv_ld_buildid=no
5526 if test $in_tree_ld = yes ; then
5527 if test "$gcc_cv_gld_major_version" -eq 2 -a \
5528 "$gcc_cv_gld_minor_version" -ge 18 -o \
5529 "$gcc_cv_gld_major_version" -gt 2 \
5530 && test $in_tree_ld_is_elf = yes; then
5531 gcc_cv_ld_buildid=yes
5533 elif test x$gcc_cv_ld != x; then
5534 if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
5535 gcc_cv_ld_buildid=yes
5538 if test x"$gcc_cv_ld_buildid" = xyes; then
5539 AC_DEFINE(HAVE_LD_BUILDID, 1,
5540 [Define if your linker supports --build-id.])
5543 AC_ARG_ENABLE(linker-build-id,
5544 [AS_HELP_STRING([--enable-linker-build-id],
5545 [compiler will always pass --build-id to linker])],
5547 enable_linker_build_id=no)
5549 if test x"$enable_linker_build_id" = xyes; then
5550 if test x"$gcc_cv_ld_buildid" = xyes; then
5551 AC_DEFINE(ENABLE_LD_BUILDID, 1,
5552 [Define if gcc should always pass --build-id to linker.])
5554 AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
5558 # In binutils 2.21, GNU ld gained support for new emulations fully
5559 # supporting the Solaris 2 ABI. Detect their presence in the linker used.
5560 AC_CACHE_CHECK(linker *_sol2 emulation support,
5561 gcc_cv_ld_sol2_emulation,
5562 [gcc_cv_ld_sol2_emulation=no
5563 if test $in_tree_ld = yes ; then
5564 if test "$gcc_cv_gld_major_version" -eq 2 -a \
5565 "$gcc_cv_gld_minor_version" -ge 21 -o \
5566 "$gcc_cv_gld_major_version" -gt 2 \
5567 && test $in_tree_ld_is_elf = yes; then
5568 gcc_cv_ld_sol2_emulation=yes
5570 elif test x$gcc_cv_ld != x; then
5571 if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
5572 grep _sol2 > /dev/null; then
5573 gcc_cv_ld_sol2_emulation=yes
5576 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
5577 AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
5578 [Define if your linker supports the *_sol2 emulations.])
5581 AC_CACHE_CHECK(linker --sysroot support,
5583 [gcc_cv_ld_sysroot=no
5584 if test $in_tree_ld = yes ; then
5585 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
5586 gcc_cv_ld_sysroot=yes
5588 elif test x$gcc_cv_ld != x; then
5589 if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
5590 gcc_cv_ld_sysroot=yes
5593 if test x"$gcc_cv_ld_sysroot" = xyes; then
5594 AC_DEFINE(HAVE_LD_SYSROOT, 1,
5595 [Define if your linker supports --sysroot.])
5600 # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
5601 AC_CACHE_CHECK([system-provided CRTs on Solaris],
5602 gcc_cv_solaris_crts,
5603 [gcc_cv_solaris_crts=no
5604 if test x$host != x$target; then
5605 if test "x$with_sysroot" = xyes; then
5606 target_sysroot="${test_exec_prefix}/${target_noncanonical}/sys-root"
5608 target_sysroot="${with_sysroot}"
5611 target_libdir="$target_sysroot/usr/lib"
5612 # At the time they were added, gcrt1.o became a symlink for backwards
5613 # compatibility on x86, while crt1.o was added on sparc, so check for that.
5615 i?86-*-solaris2* | x86_64-*-solaris2*)
5616 if test -h "$target_libdir/gcrt1.o"; then gcc_cv_solaris_crts=yes; fi
5619 if test -f "$target_libdir/crt1.o"; then gcc_cv_solaris_crts=yes; fi
5624 if test x$gcc_cv_solaris_crts = xyes; then
5625 AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
5626 [Define if the system-provided CRTs are present on Solaris.])
5629 # Test for stack protector support in target C library.
5630 AC_CACHE_CHECK(__stack_chk_fail in target C library,
5631 gcc_cv_libc_provides_ssp,
5632 [gcc_cv_libc_provides_ssp=no
5635 # All versions of musl provide stack protector
5636 gcc_cv_libc_provides_ssp=yes;;
5637 *-*-linux* | *-*-kfreebsd*-gnu)
5638 # glibc 2.4 and later provides __stack_chk_fail and
5639 # either __stack_chk_guard, or TLS access to stack guard canary.
5640 GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
5641 [if test -f $target_header_dir/features.h \
5642 && $EGREP '^[ ]*#[ ]*define[ ]+__GNU_LIBRARY__[ ]+([1-9][0-9]|[6-9])' \
5643 $target_header_dir/features.h > /dev/null; then
5644 if $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC__[ ]+1' \
5645 $target_header_dir/features.h > /dev/null && \
5646 test -f $target_header_dir/bits/uClibc_config.h && \
5647 $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC_HAS_SSP__[ ]+1' \
5648 $target_header_dir/bits/uClibc_config.h > /dev/null; then
5649 gcc_cv_libc_provides_ssp=yes
5651 # all versions of Bionic support stack protector
5652 elif test -f $target_header_dir/sys/cdefs.h \
5653 && $EGREP '^[ ]*#[ ]*define[ ]+__BIONIC__[ ]+1' \
5654 $target_header_dir/sys/cdefs.h > /dev/null; then
5655 gcc_cv_libc_provides_ssp=yes
5659 # Avoid complicated tests (see
5660 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
5661 # simply assert that glibc does provide this, which is true for all
5662 # realistically usable GNU/Hurd configurations.
5663 # All supported versions of musl provide it as well
5664 gcc_cv_libc_provides_ssp=yes;;
5665 *-*-darwin* | *-*-freebsd* | *-*-netbsd*)
5666 AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
5667 [echo "no __stack_chk_fail on this target"])
5669 *) gcc_cv_libc_provides_ssp=no ;;
5672 if test x$gcc_cv_libc_provides_ssp = xyes; then
5673 AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
5674 [Define if your target C library provides stack protector support])
5677 # Check whether --enable-default-ssp was given.
5678 AC_ARG_ENABLE(default-ssp,
5679 [AS_HELP_STRING([--enable-default-ssp],
5680 [enable Stack Smashing Protection as default])],[
5681 if test x$gcc_cv_libc_provides_ssp = xyes; then
5683 ia64*-*-*) enable_default_ssp=no ;;
5684 *) enable_default_ssp=$enableval ;;
5687 enable_default_ssp=no
5689 enable_default_ssp=no)
5690 if test x$enable_default_ssp = xyes ; then
5691 AC_DEFINE(ENABLE_DEFAULT_SSP, 1,
5692 [Define if your target supports default stack protector and it is enabled.])
5694 AC_SUBST([enable_default_ssp])
5696 # Test for <sys/sdt.h> on the target.
5697 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
5698 AC_MSG_CHECKING(sys/sdt.h in the target C library)
5700 if test -f $target_header_dir/sys/sdt.h; then
5702 AC_DEFINE(HAVE_SYS_SDT_H, 1,
5703 [Define if your target C library provides sys/sdt.h])
5705 AC_MSG_RESULT($have_sys_sdt_h)
5707 # Check if TFmode long double should be used by default or not.
5708 # Some glibc targets used DFmode long double, but with glibc 2.4
5709 # and later they can use TFmode.
5711 powerpc*-*-linux* | \
5715 AC_ARG_WITH(long-double-128,
5716 [AS_HELP_STRING([--with-long-double-128],
5717 [use 128-bit long double by default])],
5718 gcc_cv_target_ldbl128="$with_long_double_128",
5719 [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
5720 [gcc_cv_target_ldbl128=no
5721 grep '^[ ]*#[ ]*define[ ][ ]*__LONG_DOUBLE_MATH_OPTIONAL' \
5722 $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
5723 && gcc_cv_target_ldbl128=yes
5727 if test x$gcc_cv_target_ldbl128 = xyes; then
5728 AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
5729 [Define if TFmode long double should be the default])
5732 # Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
5733 # values in the TCB. Currently, only GLIBC 2.23 and later support this.
5734 gcc_cv_libc_provides_hwcap_in_tcb=no
5737 GCC_GLIBC_VERSION_GTE_IFELSE([2], [23], [gcc_cv_libc_provides_hwcap_in_tcb=yes], )
5740 if test x$gcc_cv_libc_provides_hwcap_in_tcb = xyes; then
5741 AC_DEFINE(TARGET_LIBC_PROVIDES_HWCAP_IN_TCB, 1,
5742 [Define if your target C Library provides the AT_HWCAP value in the TCB])
5745 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
5746 gcc_cv_target_dl_iterate_phdr=unknown
5748 # Restrict to Solaris 11+. While most of the Solaris 11 linker changes
5749 # were backported to Solaris 10 Update 10, dl_iterate_phdr only lives in
5750 # libdl there, both complicating its use and breaking compatibility
5751 # between Solaris 10 updates.
5752 *-*-solaris2.1[[1-9]]*)
5753 # <link.h> needs both a dl_iterate_phdr declaration and support for
5754 # compilation with largefile support.
5755 if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
5756 && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
5757 gcc_cv_target_dl_iterate_phdr=yes
5759 gcc_cv_target_dl_iterate_phdr=no
5762 *-*-dragonfly* | *-*-freebsd*)
5763 if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
5764 gcc_cv_target_dl_iterate_phdr=yes
5766 gcc_cv_target_dl_iterate_phdr=no
5770 gcc_cv_target_dl_iterate_phdr=yes
5773 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
5774 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
5775 AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
5776 [Define if your target C library provides the `dl_iterate_phdr' function.])
5778 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
5780 # We no longer support different GC mechanisms. Emit an error if
5781 # the user configures with --with-gc.
5783 [AS_HELP_STRING([--with-gc={page,zone}],
5784 [this option is not supported anymore. It used to choose
5785 the garbage collection mechanism to use with the compiler])],
5786 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
5789 # Libraries to use on the host. This will normally be set by the top
5790 # level Makefile. Here we simply capture the value for our Makefile.
5791 if test -z "${HOST_LIBS+set}"; then
5796 # Use the system's zlib library.
5799 dnl Very limited version of automake's enable-maintainer-mode
5801 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
5802 dnl maintainer-mode is disabled by default
5803 AC_ARG_ENABLE(maintainer-mode,
5804 [AS_HELP_STRING([--enable-maintainer-mode],
5805 [enable make rules and dependencies not useful
5806 (and sometimes confusing) to the casual installer])],
5807 maintainer_mode=$enableval,
5810 AC_MSG_RESULT($maintainer_mode)
5812 if test "$maintainer_mode" = "yes"; then
5819 dnl Whether to prevent multiple front-ends from linking at the same time
5821 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
5822 AC_ARG_ENABLE(link-mutex,
5823 [AS_HELP_STRING([--enable-link-mutex],
5824 [avoid linking multiple front-ends at once to avoid thrashing
5825 on the build machine])],
5826 do_link_mutex=$enableval,
5828 AC_MSG_RESULT($do_link_mutex)
5830 if test "$do_link_mutex" = "yes"; then
5835 AC_SUBST(DO_LINK_MUTEX)
5841 # Make empty files to contain the specs and options for each language.
5842 # Then add #include lines to for a compiler that has specs and/or options.
5848 # These (without "all_") are set in each config-lang.in.
5849 # `language' must be a single word so is spelled singularly.
5852 all_outputs='Makefile'
5853 # List of language makefile fragments.
5855 # Additional files for gengtype
5856 all_gtfiles="$target_gtfiles"
5858 # These are the languages that are set in --enable-languages,
5859 # and are available in the GCC tree.
5860 all_selected_languages=
5862 # Add the language fragments.
5863 # Languages are added via two mechanisms. Some information must be
5864 # recorded in makefile variables, these are defined in config-lang.in.
5865 # We accumulate them and plug them into the main Makefile.
5866 # The other mechanism is a set of hooks for each of the main targets
5867 # like `clean', `install', etc.
5869 language_hooks="Make-hooks"
5871 for lang in ${srcdir}/*/config-lang.in
5874 test "$lang" = "${srcdir}/*/config-lang.in" && continue
5876 lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^ ]*\).*$,\1,p' $lang`
5877 if test "x$lang_alias" = x
5879 echo "$lang doesn't set \$language." 1>&2
5882 subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
5883 subdirs="$subdirs $subdir"
5885 # $gcc_subdir is where the gcc integration files are to be found
5886 # for a language, both for internal compiler purposes (compiler
5887 # sources implementing front-end to GCC tree converters), and for
5888 # build infrastructure purposes (Make-lang.in, etc.)
5890 # This will be <subdir> (relative to $srcdir) if a line like
5891 # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
5892 # is found in <langdir>/config-lang.in, and will remain <langdir>
5895 # Except for the language alias (fetched above), the regular
5896 # "config-lang.in" contents are always retrieved from $gcc_subdir,
5897 # so a <langdir>/config-lang.in setting gcc_subdir typically sets
5898 # only this and the language alias.
5900 gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^ ]*\).*$,\1,p' $lang`
5901 if [ "$gcc_subdir" = "" ]; then
5902 gcc_subdir="$subdir"
5905 case ",$enable_languages," in
5907 all_selected_languages="$all_selected_languages $lang_alias"
5908 if test -f $srcdir/$gcc_subdir/lang-specs.h; then
5909 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
5921 . ${srcdir}/$gcc_subdir/config-lang.in
5922 if test "x$language" = x
5924 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
5929 case ",$enable_languages," in
5932 for i in $subdir_requires; do
5933 test -f "${srcdir}/$i/config-lang.in" && continue
5941 all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
5942 if test -f $srcdir/$gcc_subdir/lang.opt; then
5943 lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
5944 all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
5946 if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
5947 lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
5949 all_languages="$all_languages $language"
5950 all_compilers="$all_compilers $compilers"
5951 all_outputs="$all_outputs $outputs"
5952 all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
5953 case ",$enable_languages," in
5955 AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
5957 AC_SUBST(enable_lto)
5964 for language in $all_selected_languages
5966 check_languages="$check_languages check-$language"
5969 # We link each language in with a set of hooks, reached indirectly via
5970 # lang.${target}. Only do so for selected languages.
5974 target_list="all.cross start.encap rest.encap tags \
5975 install-common install-man install-info install-pdf install-html dvi \
5976 pdf html uninstall info man srcextra srcman srcinfo \
5977 mostlyclean clean distclean maintainer-clean install-plugin"
5979 for t in $target_list
5982 for lang in $all_selected_languages
5986 echo "lang.$t: $x" >> Make-hooks
5990 # Option include files
5993 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
5994 option_includes="option-includes.mk"
5995 AC_SUBST_FILE(option_includes)
6003 echo "dir ." > .gdbinit
6004 echo "dir ${srcdir}" >> .gdbinit
6005 if test x$gdb_needs_out_file_path = xyes
6007 echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
6009 if test "x$subdirs" != x; then
6012 echo "dir ${srcdir}/$s" >> .gdbinit
6015 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
6016 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
6018 # Put a breakpoint on __asan_report_error to help with debugging buffer
6021 *-fsanitize=address*)
6022 echo "source ${srcdir}/gdbasan.in" >> .gdbinit
6026 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
6027 AC_SUBST(gcc_tooldir)
6030 # Find a directory in which to install a shared libgcc.
6032 AC_ARG_ENABLE(version-specific-runtime-libs,
6033 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
6034 [specify that runtime libraries should be
6035 installed in a compiler-specific directory])])
6037 # Substitute configuration variables
6040 AC_SUBST(all_compilers)
6041 AC_SUBST(all_gtfiles)
6042 AC_SUBST(all_lang_makefrags)
6043 AC_SUBST(all_languages)
6044 AC_SUBST(all_selected_languages)
6045 AC_SUBST(build_exeext)
6046 AC_SUBST(build_install_headers_dir)
6047 AC_SUBST(build_xm_file_list)
6048 AC_SUBST(build_xm_include_list)
6049 AC_SUBST(build_xm_defines)
6050 AC_SUBST(build_file_translate)
6051 AC_SUBST(check_languages)
6052 AC_SUBST(cpp_install_dir)
6053 AC_SUBST(xmake_file)
6054 AC_SUBST(tmake_file)
6055 AC_SUBST(TM_ENDIAN_CONFIG)
6056 AC_SUBST(TM_MULTILIB_CONFIG)
6057 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
6058 AC_SUBST(extra_gcc_objs)
6059 AC_SUBST(user_headers_inc_next_pre)
6060 AC_SUBST(user_headers_inc_next_post)
6061 AC_SUBST(extra_headers_list)
6062 AC_SUBST(extra_objs)
6063 AC_SUBST(extra_programs)
6064 AC_SUBST(float_h_file)
6065 AC_SUBST(gcc_config_arguments)
6066 AC_SUBST(gcc_gxx_include_dir)
6067 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
6068 AC_SUBST(host_exeext)
6069 AC_SUBST(host_xm_file_list)
6070 AC_SUBST(host_xm_include_list)
6071 AC_SUBST(host_xm_defines)
6072 AC_SUBST(out_host_hook_obj)
6074 AC_SUBST(lang_opt_files)
6075 AC_SUBST(lang_specs_files)
6076 AC_SUBST(lang_tree_files)
6077 AC_SUBST(local_prefix)
6079 AC_SUBST(objc_boehm_gc)
6081 AC_SUBST(out_object_file)
6082 AC_SUBST(common_out_file)
6083 AC_SUBST(common_out_object_file)
6084 AC_SUBST(tm_file_list)
6085 AC_SUBST(tm_include_list)
6086 AC_SUBST(tm_defines)
6087 AC_SUBST(tm_p_file_list)
6088 AC_SUBST(tm_p_include_list)
6089 AC_SUBST(xm_file_list)
6090 AC_SUBST(xm_include_list)
6091 AC_SUBST(xm_defines)
6092 AC_SUBST(use_gcc_stdint)
6093 AC_SUBST(c_target_objs)
6094 AC_SUBST(cxx_target_objs)
6095 AC_SUBST(fortran_target_objs)
6096 AC_SUBST(target_cpu_default)
6098 AC_SUBST_FILE(language_hooks)
6101 if test x${build} = x${host} ; then
6102 if test x${host} = x${target} ; then
6103 echo "Links are now set up to build a native compiler for ${target}." 1>&2
6105 echo "Links are now set up to build a cross-compiler" 1>&2
6106 echo " from ${host} to ${target}." 1>&2
6109 if test x${host} = x${target} ; then
6110 echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
6111 echo " for ${target}." 1>&2
6113 echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
6114 echo " from ${host} to ${target}." 1>&2
6118 AC_ARG_VAR(GMPLIBS,[How to link GMP])
6119 AC_ARG_VAR(GMPINC,[How to find GMP include files])
6121 AC_ARG_VAR(ISLLIBS,[How to link isl])
6122 AC_ARG_VAR(ISLINC,[How to find isl include files])
6123 if test "x${ISLLIBS}" != "x" ; then
6124 AC_DEFINE(HAVE_isl, 1, [Define if isl is in use.])
6127 # Check whether isl_options_set_schedule_serialize_sccs is available;
6128 # it's new in isl 0.15.
6129 if test "x${ISLLIBS}" != "x" ; then
6130 saved_CXXFLAGS="$CXXFLAGS"
6131 CXXFLAGS="$CXXFLAGS $ISLINC $GMPINC"
6133 LIBS="$LIBS $ISLLIBS $GMPLIBS"
6135 AC_MSG_CHECKING([Checking for isl_options_set_schedule_serialize_sccs])
6136 AC_TRY_LINK([#include <isl/schedule.h>],
6137 [isl_options_set_schedule_serialize_sccs (NULL, 0);],
6138 [ac_has_isl_options_set_schedule_serialize_sccs=yes],
6139 [ac_has_isl_options_set_schedule_serialize_sccs=no])
6140 AC_MSG_RESULT($ac_has_isl_options_set_schedule_serialize_sccs)
6143 CXXFLAGS="$saved_CXXFLAGS"
6145 if test x"$ac_has_isl_options_set_schedule_serialize_sccs" = x"yes"; then
6146 AC_DEFINE(HAVE_ISL_OPTIONS_SET_SCHEDULE_SERIALIZE_SCCS, 1,
6147 [Define if isl_options_set_schedule_serialize_sccs exists.])
6152 AC_SUBST(pluginlibs)
6153 AC_SUBST(enable_plugin)
6154 if test x"$enable_plugin" = x"yes"; then
6155 AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
6159 # Enable --enable-host-shared
6160 AC_ARG_ENABLE(host-shared,
6161 [AS_HELP_STRING([--enable-host-shared],
6162 [build host code as shared libraries])],
6163 [PICFLAG=-fPIC], [PICFLAG=])
6164 AC_SUBST(enable_host_shared)
6168 AC_ARG_ENABLE(libquadmath-support,
6169 [AS_HELP_STRING([--disable-libquadmath-support],
6170 [disable libquadmath support for Fortran])],
6171 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
6172 ENABLE_LIBQUADMATH_SUPPORT=yes)
6173 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
6174 AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
6175 [Define to 1 to enable libquadmath support])
6179 # Specify what hash style to use by default.
6180 AC_ARG_WITH([linker-hash-style],
6181 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
6182 [specify the linker hash style])],
6183 [case x"$withval" in
6185 LINKER_HASH_STYLE=sysv
6188 LINKER_HASH_STYLE=gnu
6191 LINKER_HASH_STYLE=both
6194 AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
6197 [LINKER_HASH_STYLE=''])
6198 if test x"${LINKER_HASH_STYLE}" != x; then
6199 AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
6200 [The linker hash style])
6203 # Specify what should be the default of -fdiagnostics-color option.
6204 AC_ARG_WITH([diagnostics-color],
6205 [AC_HELP_STRING([--with-diagnostics-color={never,auto,auto-if-env,always}],
6206 [specify the default of -fdiagnostics-color option
6207 auto-if-env stands for -fdiagnostics-color=auto if
6208 GCC_COLOR environment variable is present and
6209 -fdiagnostics-color=never otherwise])],
6210 [case x"$withval" in
6212 DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_NO
6215 DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO
6218 DIAGNOSTICS_COLOR_DEFAULT=-1
6221 DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_YES
6224 AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-color])
6227 [DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO])
6228 AC_DEFINE_UNQUOTED(DIAGNOSTICS_COLOR_DEFAULT, $DIAGNOSTICS_COLOR_DEFAULT,
6229 [The default for -fdiagnostics-color option])
6231 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
6232 # of jit/jit-playback.c.
6233 cat > gcc-driver-name.h <<EOF
6234 #define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_BASEVER}${exeext}"
6237 # Check whether --enable-default-pie was given.
6238 AC_ARG_ENABLE(default-pie,
6239 [AS_HELP_STRING([--enable-default-pie],
6240 [enable Position Independent Executable as default])],
6241 enable_default_pie=$enableval,
6242 enable_default_pie=no)
6243 if test x$enable_default_pie = xyes ; then
6244 AC_DEFINE(ENABLE_DEFAULT_PIE, 1,
6245 [Define if your target supports default PIE and it is enabled.])
6247 AC_SUBST([enable_default_pie])
6249 # Check if -fno-PIE works.
6250 AC_CACHE_CHECK([for -fno-PIE option],
6252 [saved_CXXFLAGS="$CXXFLAGS"
6253 CXXFLAGS="$CXXFLAGS -fno-PIE"
6254 AC_COMPILE_IFELSE([int main(void) {return 0;}],
6255 [gcc_cv_c_no_fpie=yes],
6256 [gcc_cv_c_no_fpie=no])
6257 CXXFLAGS="$saved_CXXFLAGS"])
6258 if test "$gcc_cv_c_no_fpie" = "yes"; then
6259 NO_PIE_CFLAGS="-fno-PIE"
6261 AC_SUBST([NO_PIE_CFLAGS])
6263 # Check if -no-pie works.
6264 AC_CACHE_CHECK([for -no-pie option],
6266 [saved_LDFLAGS="$LDFLAGS"
6267 LDFLAGS="$LDFLAGS -no-pie"
6268 AC_LINK_IFELSE([int main(void) {return 0;}],
6269 [gcc_cv_no_pie=yes],
6271 LDFLAGS="$saved_LDFLAGS"])
6272 if test "$gcc_cv_no_pie" = "yes"; then
6273 NO_PIE_FLAG="-no-pie"
6275 AC_SUBST([NO_PIE_FLAG])
6277 # Check linker supports '-z bndplt'
6278 ld_bndplt_support=no
6279 AC_MSG_CHECKING(linker -z bndplt option)
6280 if test x"$ld_is_gold" = xno; then
6281 if test $in_tree_ld = yes ; then
6282 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6283 ld_bndplt_support=yes
6285 elif test x$gcc_cv_ld != x; then
6286 # Check if linker supports -a bndplt option
6287 if $gcc_cv_ld --help 2>/dev/null | grep -- '-z bndplt' > /dev/null; then
6288 ld_bndplt_support=yes
6292 if test x"$ld_bndplt_support" = xyes; then
6293 AC_DEFINE(HAVE_LD_BNDPLT_SUPPORT, 1,
6294 [Define if your linker supports -z bndplt])
6296 AC_MSG_RESULT($ld_bndplt_support)
6298 # Check linker supports '--push-state'/'--pop-state'
6299 ld_pushpopstate_support=no
6300 AC_MSG_CHECKING(linker --push-state/--pop-state options)
6301 if test x"$ld_is_gold" = xno; then
6302 if test $in_tree_ld = yes ; then
6303 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6304 ld_pushpopstate_support=yes
6306 elif test x$gcc_cv_ld != x; then
6307 # Check if linker supports --push-state/--pop-state options
6308 if $gcc_cv_ld --help 2>/dev/null | grep -- '--push-state' > /dev/null; then
6309 ld_pushpopstate_support=yes
6313 if test x"$ld_pushpopstate_support" = xyes; then
6314 AC_DEFINE(HAVE_LD_PUSHPOPSTATE_SUPPORT, 1,
6315 [Define if your linker supports --push-state/--pop-state])
6317 AC_MSG_RESULT($ld_pushpopstate_support)
6319 # Configure the subdirectories
6320 # AC_CONFIG_SUBDIRS($subdirs)
6322 # Create the Makefile
6323 # and configure language subdirectories
6324 AC_CONFIG_FILES($all_outputs)
6326 AC_CONFIG_COMMANDS([default],
6328 case ${CONFIG_HEADERS} in
6329 *auto-host.h:config.in*)
6332 # Make sure all the subdirs exist.
6333 for d in $subdirs doc build common c-family
6335 test -d $d || mkdir $d
6338 [subdirs='$subdirs'])