2 # Process this file with autoconf to generate a configuration script.
4 # Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
5 # 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
7 #This file is part of GCC.
9 #GCC is free software; you can redistribute it and/or modify it under
10 #the terms of the GNU General Public License as published by the Free
11 #Software Foundation; either version 3, or (at your option) any later
14 #GCC is distributed in the hope that it will be useful, but WITHOUT
15 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 #FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 #You should have received a copy of the GNU General Public License
20 #along with GCC; see the file COPYING3. If not see
21 #<http://www.gnu.org/licenses/>.
23 # --------------------------------
24 # Initialization and sanity checks
25 # --------------------------------
29 AC_CONFIG_SRCDIR(tree.c)
30 AC_CONFIG_HEADER(auto-host.h:config.in)
32 gcc_version=`cat $srcdir/BASE-VER`
34 # Determine the host, build, and target systems
39 # Determine the noncanonical target name, for directory use.
40 ACX_NONCANONICAL_TARGET
42 # Determine the target- and build-specific subdirectories
45 # Set program_transform_name
48 # Check for bogus environment variables.
49 # Test if LIBRARY_PATH contains the notation for the current directory
50 # since this would lead to problems installing/building glibc.
51 # LIBRARY_PATH contains the current directory if one of the following
53 # - one of the terminals (":" and ";") is the first or last sign
54 # - two terminals occur directly after each other
55 # - the path contains an element with a dot in it
56 AC_MSG_CHECKING(LIBRARY_PATH variable)
58 case ${LIBRARY_PATH} in
59 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
60 library_path_setting="contains current directory"
63 library_path_setting="ok"
67 AC_MSG_RESULT($library_path_setting)
68 if test "$library_path_setting" != "ok"; then
70 *** LIBRARY_PATH shouldn't contain the current directory when
71 *** building gcc. Please change the environment variable
72 *** and run configure again.])
75 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
76 # since this would lead to problems installing/building glibc.
77 # GCC_EXEC_PREFIX contains the current directory if one of the following
79 # - one of the terminals (":" and ";") is the first or last sign
80 # - two terminals occur directly after each other
81 # - the path contains an element with a dot in it
82 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
84 case ${GCC_EXEC_PREFIX} in
85 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
86 gcc_exec_prefix_setting="contains current directory"
89 gcc_exec_prefix_setting="ok"
93 AC_MSG_RESULT($gcc_exec_prefix_setting)
94 if test "$gcc_exec_prefix_setting" != "ok"; then
96 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
97 *** building gcc. Please change the environment variable
98 *** and run configure again.])
105 # Specify the local prefix
107 AC_ARG_WITH(local-prefix,
108 [ --with-local-prefix=DIR specifies directory to put local include],
109 [case "${withval}" in
110 yes) AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
112 *) local_prefix=$with_local_prefix ;;
115 # Default local prefix if it is empty
116 if test x$local_prefix = x; then
117 local_prefix=/usr/local
120 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
121 # passed in by the toplevel make and thus we'd get different behavior
122 # depending on where we built the sources.
124 # Specify the g++ header file directory
125 AC_ARG_WITH(gxx-include-dir,
126 [ --with-gxx-include-dir=DIR
127 specifies directory to put g++ header files],
128 [case "${withval}" in
129 yes) AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
131 *) gcc_gxx_include_dir=$with_gxx_include_dir ;;
134 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
135 if test x${gcc_gxx_include_dir} = x; then
136 if test x${enable_version_specific_runtime_libs} = xyes; then
137 gcc_gxx_include_dir='${libsubdir}/include/c++'
139 libstdcxx_incdir='include/c++/$(version)'
140 if test x$host != x$target; then
141 libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
143 gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
147 AC_ARG_WITH(cpp_install_dir,
148 [ --with-cpp-install-dir=DIR
149 install the user visible C preprocessor in DIR
150 (relative to PREFIX) as well as PREFIX/bin],
151 [if test x$withval = xyes; then
152 AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
153 elif test x$withval != xno; then
154 cpp_install_dir=$withval
157 # We would like to our source tree to be readonly. However when releases or
158 # pre-releases are generated, the flex/bison generated files as well as the
159 # various formats of manuals need to be included along with the rest of the
160 # sources. Therefore we have --enable-generated-files-in-srcdir to do
163 AC_MSG_CHECKING([whether to place generated files in the source directory])
164 dnl generated-files-in-srcdir is disabled by default
165 AC_ARG_ENABLE(generated-files-in-srcdir,
166 [ --enable-generated-files-in-srcdir
167 put copies of generated files in source dir
168 intended for creating source tarballs for users
169 without texinfo bison or flex.],
170 generated_files_in_srcdir=$enableval,
171 generated_files_in_srcdir=no)
173 AC_MSG_RESULT($generated_files_in_srcdir)
175 if test "$generated_files_in_srcdir" = "yes"; then
182 # -------------------
183 # Find default linker
184 # -------------------
188 [ --with-gnu-ld arrange to work with GNU ld.],
189 gnu_ld_flag="$with_gnu_ld",
192 # With pre-defined ld
194 [ --with-ld arrange to use the specified ld (full pathname)],
195 DEFAULT_LINKER="$with_ld")
196 if test x"${DEFAULT_LINKER+set}" = x"set"; then
197 if test ! -x "$DEFAULT_LINKER"; then
198 AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
199 elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
202 AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
203 [Define to enable the use of a default linker.])
206 gnu_ld=`if test x"$gnu_ld_flag" = x"yes"; then echo 1; else echo 0; fi`
207 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld, [Define if using GNU ld.])
209 AC_MSG_CHECKING([whether a default linker was specified])
210 if test x"${DEFAULT_LINKER+set}" = x"set"; then
211 if test x"$gnu_ld_flag" = x"no"; then
212 AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
214 AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
220 # With demangler in GNU ld
221 AC_ARG_WITH(demangler-in-ld,
222 [ --with-demangler-in-ld try to use demangler in GNU ld.],
223 demangler_in_ld="$with_demangler_in_ld",
226 # ----------------------
227 # Find default assembler
228 # ----------------------
232 [ --with-gnu-as arrange to work with GNU as],
233 gas_flag="$with_gnu_as",
237 [ --with-as arrange to use the specified as (full pathname)],
238 DEFAULT_ASSEMBLER="$with_as")
239 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
240 if test ! -x "$DEFAULT_ASSEMBLER"; then
241 AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
242 elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
245 AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
246 [Define to enable the use of a default assembler.])
249 gnu_as=`if test x"$gas_flag" = x"yes"; then echo 1; else echo 0; fi`
250 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as, [Define if using GNU as.])
252 AC_MSG_CHECKING([whether a default assembler was specified])
253 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
254 if test x"$gas_flag" = x"no"; then
255 AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
257 AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
267 # If a non-executable a.out is present (e.g. created by GNU as above even if
268 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
269 # file, even when creating an executable, so an execution test fails.
270 # Remove possible default executable files to avoid this.
272 # FIXME: This really belongs into AC_PROG_CC and can be removed once
273 # Autoconf includes it.
274 rm -f a.out a.exe b.out
276 # Find the native compiler
280 ACX_PROG_GNAT([-I"$srcdir"/ada])
282 # autoconf is lame and doesn't give us any substitution variable for this.
283 if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
284 NO_MINUS_C_MINUS_O=yes
286 OUTPUT_OPTION='-o $@'
288 AC_SUBST(NO_MINUS_C_MINUS_O)
289 AC_SUBST(OUTPUT_OPTION)
291 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
292 # optimizations to be activated explicitly by the toplevel.
295 *) CFLAGS=`echo $CFLAGS | sed "s/-O[[s0-9]]* *//" ` ;;
299 # -------------------------
300 # Check C compiler features
301 # -------------------------
303 AC_USE_SYSTEM_EXTENSIONS
307 # sizeof(char) is 1 by definition.
308 AC_CHECK_SIZEOF(void *)
309 AC_CHECK_SIZEOF(short)
311 AC_CHECK_SIZEOF(long)
312 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
313 AC_CHECK_TYPES([__int64], [AC_CHECK_SIZEOF(__int64)])
316 # ---------------------
317 # Warnings and checking
318 # ---------------------
320 # Check $CC warning features (if it's GCC).
321 # We want to use -pedantic, but we don't want warnings about
325 # So, we only use -pedantic if we can disable those warnings.
327 ACX_PROG_CC_WARNING_OPTS(
328 m4_quote(m4_do([-W -Wall -Wwrite-strings -Wcast-qual])), [loose_warn])
329 ACX_PROG_CC_WARNING_OPTS(
330 m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
332 ACX_PROG_CC_WARNING_OPTS(
333 m4_quote(m4_do([-Wmissing-format-attribute])), [strict_warn])
334 ACX_PROG_CC_WARNING_OPTS(
335 m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
336 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(
337 m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
338 [-Wno-overlength-strings])), [strict_warn])
339 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual], [strict_warn])
341 # The above macros do nothing if the compiler is not GCC. However, the
342 # Makefile has more goo to add other flags, so these variables are used
343 # to enable warnings only for GCC.
346 if test "x$GCC" = "xyes"; then
347 warn_cflags='$(GCC_WARN_CFLAGS)'
348 warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
350 AC_SUBST(warn_cflags)
351 AC_SUBST(warn_cxxflags)
353 # Enable expensive internal checks
355 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
359 AC_ARG_ENABLE(checking,
360 [ --enable-checking[=LIST]
361 enable expensive run-time checks. With LIST,
362 enable only specific categories of checks.
363 Categories are: yes,no,all,none,release.
364 Flags are: assert,df,fold,gc,gcac,gimple,misc,
365 rtlflag,rtl,runtime,tree,valgrind,types.],
366 [ac_checking_flags="${enableval}"],[
367 # Determine the default checks.
368 if test x$is_release = x ; then
369 ac_checking_flags=yes
371 ac_checking_flags=release
373 IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="$IFS,"
374 for check in release $ac_checking_flags
377 # these set all the flags to specific states
378 yes) ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
379 ac_fold_checking= ; ac_gc_checking=1 ;
380 ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
381 ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
382 ac_tree_checking=1 ; ac_valgrind_checking= ;
383 ac_types_checking=1 ;;
384 no|none) ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
385 ac_fold_checking= ; ac_gc_checking= ;
386 ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
387 ac_rtlflag_checking= ; ac_runtime_checking= ;
388 ac_tree_checking= ; ac_valgrind_checking= ;
389 ac_types_checking= ;;
390 all) ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
391 ac_fold_checking=1 ; ac_gc_checking=1 ;
392 ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
393 ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
394 ac_tree_checking=1 ; ac_valgrind_checking= ;
395 ac_types_checking=1 ;;
396 release) ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
397 ac_fold_checking= ; ac_gc_checking= ;
398 ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
399 ac_rtlflag_checking= ; ac_runtime_checking=1 ;
400 ac_tree_checking= ; ac_valgrind_checking= ;
401 ac_types_checking= ;;
402 # these enable particular checks
403 assert) ac_assert_checking=1 ;;
404 df) ac_df_checking=1 ;;
405 fold) ac_fold_checking=1 ;;
406 gc) ac_gc_checking=1 ;;
407 gcac) ac_gc_always_collect=1 ;;
408 gimple) ac_gimple_checking=1 ;;
409 misc) ac_checking=1 ;;
410 rtl) ac_rtl_checking=1 ;;
411 rtlflag) ac_rtlflag_checking=1 ;;
412 runtime) ac_runtime_checking=1 ;;
413 tree) ac_tree_checking=1 ;;
414 types) ac_types_checking=1 ;;
415 valgrind) ac_valgrind_checking=1 ;;
416 *) AC_MSG_ERROR(unknown check category $check) ;;
422 if test x$ac_checking != x ; then
423 AC_DEFINE(ENABLE_CHECKING, 1,
424 [Define if you want more run-time sanity checks. This one gets a grab
425 bag of miscellaneous but relatively cheap checks.])
426 nocommon_flag=-fno-common
428 AC_SUBST(nocommon_flag)
429 if test x$ac_df_checking != x ; then
430 AC_DEFINE(ENABLE_DF_CHECKING, 1,
431 [Define if you want more run-time sanity checks for dataflow.])
433 if test x$ac_assert_checking != x ; then
434 AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
435 [Define if you want assertions enabled. This is a cheap check.])
437 if test x$ac_gimple_checking != x ; then
438 AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
439 [Define if you want operations on GIMPLE (the basic data structure of
440 the high-level optimizers) to be checked for dynamic type safety at
441 runtime. This is moderately expensive.])
443 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
444 if test x$ac_runtime_checking != x ; then
445 AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
446 [Define if you want runtime assertions enabled. This is a cheap check.])
448 if test x$ac_tree_checking != x ; then
449 AC_DEFINE(ENABLE_TREE_CHECKING, 1,
450 [Define if you want all operations on trees (the basic data
451 structure of the front ends) to be checked for dynamic type safety
452 at runtime. This is moderately expensive. The tree browser debugging
453 routines will also be enabled by this option.
455 TREEBROWSER=tree-browser.o
457 if test x$ac_types_checking != x ; then
458 AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
459 [Define if you want all gimple types to be verified after gimplifiation.
463 AC_SUBST(TREEBROWSER)
464 if test x$ac_rtl_checking != x ; then
465 AC_DEFINE(ENABLE_RTL_CHECKING, 1,
466 [Define if you want all operations on RTL (the basic data structure
467 of the optimizer and back end) to be checked for dynamic type safety
468 at runtime. This is quite expensive.])
470 if test x$ac_rtlflag_checking != x ; then
471 AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
472 [Define if you want RTL flag accesses to be checked against the RTL
473 codes that are supported for each access macro. This is relatively
476 if test x$ac_gc_checking != x ; then
477 AC_DEFINE(ENABLE_GC_CHECKING, 1,
478 [Define if you want the garbage collector to do object poisoning and
479 other memory allocation checks. This is quite expensive.])
481 if test x$ac_gc_always_collect != x ; then
482 AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
483 [Define if you want the garbage collector to operate in maximally
484 paranoid mode, validating the entire heap and collecting garbage at
485 every opportunity. This is extremely expensive.])
487 if test x$ac_fold_checking != x ; then
488 AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
489 [Define if you want fold checked that it never destructs its argument.
490 This is quite expensive.])
492 valgrind_path_defines=
495 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
496 dnl # an if statement. This was the source of very frustrating bugs
497 dnl # in converting to autoconf 2.5x!
498 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
500 if test x$ac_valgrind_checking != x ; then
501 # It is certainly possible that there's valgrind but no valgrind.h.
502 # GCC relies on making annotations so we must have both.
503 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
504 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
505 [[#include <valgrind/memcheck.h>
506 #ifndef VALGRIND_DISCARD
507 #error VALGRIND_DISCARD not defined
509 [gcc_cv_header_valgrind_memcheck_h=yes],
510 [gcc_cv_header_valgrind_memcheck_h=no])
511 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
512 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
513 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
514 [[#include <memcheck.h>
515 #ifndef VALGRIND_DISCARD
516 #error VALGRIND_DISCARD not defined
518 [gcc_cv_header_memcheck_h=yes],
519 [gcc_cv_header_memcheck_h=no])
520 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
521 AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
522 [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
523 if test "x$valgrind_path" = "x" \
524 || (test $have_valgrind_h = no \
525 && test $gcc_cv_header_memcheck_h = no \
526 && test $gcc_cv_header_valgrind_memcheck_h = no); then
527 AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
529 valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
530 valgrind_command="$valgrind_path -q"
531 AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
532 [Define if you want to run subprograms and generated programs
533 through valgrind (a memory checker). This is extremely expensive.])
534 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
535 AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
536 [Define if valgrind's valgrind/memcheck.h header is installed.])
538 if test $gcc_cv_header_memcheck_h = yes; then
539 AC_DEFINE(HAVE_MEMCHECK_H, 1,
540 [Define if valgrind's memcheck.h header is installed.])
543 AC_SUBST(valgrind_path_defines)
544 AC_SUBST(valgrind_command)
546 # Enable code coverage collection
547 AC_ARG_ENABLE(coverage,
548 [ --enable-coverage[=LEVEL]
549 enable compiler's code coverage collection.
550 Use to measure compiler performance and locate
551 unused parts of the compiler. With LEVEL, specify
552 optimization. Values are opt, noopt,
554 [case "${enableval}" in
556 coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
559 coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
562 # a.k.a. --disable-coverage
566 AC_MSG_ERROR(unknown coverage setting $enableval)
570 AC_SUBST(coverage_flags)
572 AC_ARG_ENABLE(gather-detailed-mem-stats,
573 [ --enable-gather-detailed-mem-stats enable detailed memory allocation stats gathering], [],
574 [enable_gather_detailed_mem_stats=no])
575 if test x$enable_gather_detailed_mem_stats = xyes ; then
576 AC_DEFINE(GATHER_STATISTICS, 1,
577 [Define to enable detailed memory allocation stats gathering.])
580 # -------------------------------
581 # Miscenalleous configure options
582 # -------------------------------
584 # See if we are building gcc with C++.
585 AC_ARG_ENABLE(build-with-cxx,
586 [ --enable-build-with-cxx build with C++ compiler instead of C compiler],
587 ENABLE_BUILD_WITH_CXX=$enableval,
588 ENABLE_BUILD_WITH_CXX=no)
589 AC_SUBST(ENABLE_BUILD_WITH_CXX)
593 [ --with-stabs arrange to use stabs instead of host debug format],
597 # Determine whether or not multilibs are enabled.
598 AC_ARG_ENABLE(multilib,
599 [ --enable-multilib enable library support for multiple ABIs],
600 [], [enable_multilib=yes])
601 AC_SUBST(enable_multilib)
603 # Enable __cxa_atexit for C++.
604 AC_ARG_ENABLE(__cxa_atexit,
605 [ --enable-__cxa_atexit enable __cxa_atexit for C++],
608 # Enable C extension for decimal float if target supports it.
609 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
611 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
612 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
613 [Define to 1 to enable decimal float extension to C.])
615 # Use default_decimal_float for dependency.
616 enable_decimal_float=$default_decimal_float
618 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
619 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
620 [Define to 1 to specify that we are using the BID decimal floating
621 point format instead of DPD])
623 # Enable C extension for fixed-point arithmetic.
624 AC_ARG_ENABLE(fixed-point,
625 [ --enable-fixed-point enable fixed-point arithmetic extension to C],
633 AC_MSG_WARN([fixed-point is not supported on IRIX, ignored])
634 enable_fixed_point=no
637 enable_fixed_point=yes
642 AC_MSG_WARN([fixed-point is not supported for this target, ignored])
643 enable_fixed_point=no
647 AC_SUBST(enable_fixed_point)
649 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
650 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
651 [Define to 1 to enable fixed-point arithmetic extension to C.])
654 # Pass with no value to take the default
655 # Pass with a value to specify a thread package
656 AC_ARG_ENABLE(threads,
657 [ --enable-threads enable thread usage for target GCC
658 --enable-threads=LIB use LIB thread package for target GCC],,
662 [ --enable-tls enable or disable generation of tls code
663 overriding the assembler check for tls support],
667 *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
668 Valid choices are 'yes' and 'no'.]) ;;
672 AC_ARG_ENABLE(objc-gc,
673 [ --enable-objc-gc enable the use of Boehm's garbage collector with
674 the GNU Objective-C runtime],
675 if test x$enable_objc_gc = xno; then
683 [ --with-dwarf2 force the default debug format to be DWARF 2],
684 dwarf2="$with_dwarf2",
687 AC_ARG_ENABLE(shared,
688 [ --disable-shared don't provide a shared libgcc],
690 case $enable_shared in
694 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
695 for pkg in $enableval; do
696 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
703 ], [enable_shared=yes])
704 AC_SUBST(enable_shared)
706 AC_ARG_WITH(build-sysroot,
707 [ --with-build-sysroot=sysroot
708 use sysroot as the system root during the build])
711 [ --with-sysroot[=DIR] Search for usr/lib, usr/include, et al, within DIR.],
713 case ${with_sysroot} in
714 yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
715 *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
718 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
719 CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
721 if test "x$prefix" = xNONE; then
722 test_prefix=/usr/local
726 if test "x$exec_prefix" = xNONE; then
727 test_exec_prefix=$test_prefix
729 test_exec_prefix=$exec_prefix
731 case ${TARGET_SYSTEM_ROOT} in
732 "${test_prefix}"|"${test_prefix}/"*|\
733 "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
734 '${prefix}'|'${prefix}/'*|\
735 '${exec_prefix}'|'${exec_prefix}/'*)
736 t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
737 TARGET_SYSTEM_ROOT_DEFINE="$t"
742 TARGET_SYSTEM_ROOT_DEFINE=
743 CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
745 AC_SUBST(TARGET_SYSTEM_ROOT)
746 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
747 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
750 [AS_HELP_STRING([--with-specs=SPECS],
751 [add SPECS to driver command-line processing])],
752 [CONFIGURE_SPECS=$withval],
755 AC_SUBST(CONFIGURE_SPECS)
757 # Build with intermodule optimisations
758 AC_ARG_ENABLE(intermodule,
759 [ --enable-intermodule build the compiler in one step],
760 [case ${enable_intermodule} in
761 yes) onestep="-onestep";;
767 ACX_PKGVERSION([GCC])
768 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
770 # Sanity check enable_languages in case someone does not run the toplevel
771 # configure # script.
772 AC_ARG_ENABLE(languages,
773 [ --enable-languages=LIST specify which front-ends to build],
774 [case ,${enable_languages}, in
776 # go safe -- we cannot be much sure without the toplevel
778 # analysis of which target libs are present and usable
782 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
787 enable_languages=c,${enable_languages}
790 [enable_languages=c])
792 AC_ARG_WITH(multilib-list,
793 [ --with-multilib-list Select multilibs (SH only)],
795 with_multilib_list=default)
797 # -------------------------
798 # Checks for other programs
799 # -------------------------
803 # Find some useful tools
805 # We need awk to create options.c and options.h.
806 # Bail out if it's missing.
808 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
816 # By default, the Darwin ranlib will not treat common symbols as
817 # definitions when building the archive table of contents. Other
818 # ranlibs do that; pass an option to the Darwin ranlib that makes
819 # it behave similarly.
825 AC_SUBST(ranlib_flags)
829 # See if cmp has --ignore-initial.
830 gcc_AC_PROG_CMP_IGNORE_INITIAL
832 # See if we have the mktemp command.
833 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
835 # See if makeinfo has been installed and is modern enough
836 # that we can use it.
837 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
838 [GNU texinfo.* \([0-9][0-9.]*\)],
839 [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
840 if test $gcc_cv_prog_makeinfo_modern = no; then
842 *** Makeinfo is missing or too old.
843 *** Info documentation will not be built.])
850 # Is pod2man recent enough to regenerate manpages?
851 AC_MSG_CHECKING([for recent Pod::Man])
852 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
854 GENERATED_MANPAGES=generated-manpages
859 AC_SUBST(GENERATED_MANPAGES)
861 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
864 dnl Don't use AC_PROG_LEX; we insist on flex.
865 dnl LEXLIB is not useful in gcc.
866 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
869 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
871 # Binutils are not build modules, unlike bison/flex/makeinfo. So we
872 # check for build == host before using them.
875 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
876 && test -d ../binutils ; then
877 NM='${objdir}/../binutils/nm-new'
879 AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
883 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
884 && test -d ../binutils ; then
885 AR='${objdir}/../binutils/ar'
887 AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
891 # --------------------
892 # Checks for C headers
893 # --------------------
895 # Need to reject headers which give warnings, so that the -Werror bootstrap
896 # works later. *sigh* This needs to come before all header checks.
903 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
904 fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
905 sys/resource.h sys/param.h sys/times.h sys/stat.h \
906 direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
908 # Check for thread headers.
909 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
910 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
912 # These tests can't be done till we know if we have limits.h.
921 # These libraries may be used by collect2.
922 # We may need a special search path to get them linked.
923 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
925 for libs in '' -lld -lmld \
926 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
927 '-L/usr/lib/cmplrs/cc3.11 -lmld'
930 AC_TRY_LINK_FUNC(ldopen,
931 [gcc_cv_collect2_libs="$libs"; break])
934 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
935 case $gcc_cv_collect2_libs in
937 *) COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
939 AC_SUBST(COLLECT2_LIBS)
941 # When building Ada code on Alpha, we need exc_resume which is usually in
942 # -lexc. So test for it.
945 AC_SEARCH_LIBS(exc_resume, exc)
948 AC_SUBST(GNAT_LIBEXC)
950 # Some systems put ldexp and frexp in libm instead of libc; assume
951 # they're both in the same place. jcf-dump needs them.
954 AC_SEARCH_LIBS(ldexp, m)
959 # Use <inttypes.h> only if it exists,
960 # doesn't clash with <sys/types.h>, and declares intmax_t.
961 AC_MSG_CHECKING(for inttypes.h)
962 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
963 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
964 [[#include <sys/types.h>
965 #include <inttypes.h>]],
966 [[intmax_t i = -1;]])],
967 [gcc_cv_header_inttypes_h=yes],
968 [gcc_cv_header_inttypes_h=no])])
969 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
970 if test $gcc_cv_header_inttypes_h = yes; then
971 AC_DEFINE(HAVE_INTTYPES_H, 1,
972 [Define if you have a working <inttypes.h> header file.])
975 dnl Disabled until we have a complete test for buggy enum bitfields.
976 dnl gcc_AC_C_ENUM_BF_UNSIGNED
978 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
979 ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
980 fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
981 fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
982 putchar_unlocked putc_unlocked)
983 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
984 sysconf strsignal getrusage nl_langinfo \
985 gettimeofday mbstowcs wcswidth mmap mincore setlocale \
988 save_CPPFLAGS="$CPPFLAGS"
990 LIBS="$LIBS $LIBELFLIBS"
991 AC_CHECK_FUNCS(elf_getshdrstrndx,,
992 [AC_CHECK_FUNCS(elf_getshstrndx,
993 [AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
997 return elf_getshstrndx (NULL, 0) == 0;
998 }]])], AC_DEFINE(HAVE_ELF_GETSHSTRNDX_GABI, 1,
999 [Define if elf_getshstrndx has gABI conformant return values.]))])]
1002 CPPFLAGS="$save_CPPFLAGS"
1004 if test x$ac_cv_func_mbstowcs = xyes; then
1005 AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1006 [ AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1012 [gcc_cv_func_mbstowcs_works=yes],
1013 [gcc_cv_func_mbstowcs_works=no],
1014 [gcc_cv_func_mbstowcs_works=yes])])
1015 if test x$gcc_cv_func_mbstowcs_works = xyes; then
1016 AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1017 [Define this macro if mbstowcs does not crash when its
1018 first argument is NULL.])
1022 AC_CHECK_TYPE(ssize_t, int)
1023 AC_CHECK_TYPE(caddr_t, char *)
1025 gcc_AC_FUNC_MMAP_BLACKLIST
1029 # Under VMS, vfork works very differently than on Unix. The standard test
1030 # won't work, and it isn't easily adaptable. It makes more sense to
1032 ac_cv_func_vfork_works=yes
1038 # Until we have in-tree GNU iconv:
1040 AC_SUBST(LIBICONV_DEP)
1046 # We will need to find libiberty.h and ansidecl.h
1047 saved_CFLAGS="$CFLAGS"
1048 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
1049 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1050 strsignal strstr strverscmp \
1051 errno snprintf vsnprintf vasprintf malloc realloc calloc \
1052 free basename getopt clock getpagesize gcc_UNLOCKED_FUNCS, , ,[
1053 #include "ansidecl.h"
1054 #include "system.h"])
1056 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1057 #include "ansidecl.h"
1059 #ifdef HAVE_SYS_RESOURCE_H
1060 #include <sys/resource.h>
1064 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1065 #include "ansidecl.h"
1067 #ifdef HAVE_SYS_RESOURCE_H
1068 #include <sys/resource.h>
1070 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1071 [Define to `long' if <sys/resource.h> doesn't define.])])
1073 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1074 # FREAD and FWRITE macros. Fortunately, for GCC's single usage of ldgetname
1075 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1076 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1077 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1078 #include "ansidecl.h"
1087 gcc_AC_CHECK_DECLS(times, , ,[
1088 #include "ansidecl.h"
1090 #ifdef HAVE_SYS_TIMES_H
1091 #include <sys/times.h>
1095 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1096 #include "ansidecl.h"
1101 # More time-related stuff.
1102 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1103 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1104 #include "ansidecl.h"
1106 #ifdef HAVE_SYS_TIMES_H
1107 #include <sys/times.h>
1109 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1110 if test $ac_cv_struct_tms = yes; then
1111 AC_DEFINE(HAVE_STRUCT_TMS, 1,
1112 [Define if <sys/times.h> defines struct tms.])
1115 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1116 # revisit after autoconf 2.50.
1117 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1118 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1119 #include "ansidecl.h"
1121 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1122 if test $gcc_cv_type_clock_t = yes; then
1123 AC_DEFINE(HAVE_CLOCK_T, 1,
1124 [Define if <time.h> defines clock_t.])
1127 # Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1128 CFLAGS="$saved_CFLAGS"
1130 gcc_AC_INITFINI_ARRAY
1132 # mkdir takes a single argument on some systems.
1133 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1141 # With Setjmp/Longjmp based exception handling.
1142 AC_ARG_ENABLE(sjlj-exceptions,
1143 [ --enable-sjlj-exceptions
1144 arrange to use setjmp/longjmp exception handling],
1147 if test $enableval != yes; then
1148 AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1153 force_sjlj_exceptions=yes],
1156 force_sjlj_exceptions=yes
1160 force_sjlj_exceptions=no
1163 if test $force_sjlj_exceptions = yes; then
1164 sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1165 AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1166 [Define 0/1 to force the choice for exception handling model.])
1169 # For platforms with the unwind ABI which includes an unwind library,
1170 # libunwind, we can choose to use the system libunwind.
1171 # config.gcc also contains tests of with_system_libunwind.
1172 GCC_CHECK_UNWIND_GETIPINFO
1174 # --------------------------------------------------------
1175 # Build, host, and target specific configuration fragments
1176 # --------------------------------------------------------
1178 # Collect build-machine-specific information.
1179 . ${srcdir}/config.build
1181 # Collect host-machine-specific information.
1182 . ${srcdir}/config.host
1186 # Collect target-machine-specific information.
1187 . ${srcdir}/config.gcc
1189 extra_objs="${host_extra_objs} ${extra_objs}"
1190 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1192 # Default the target-machine variables that were not explicitly set.
1193 if test x"$tm_file" = x
1194 then tm_file=$cpu_type/$cpu_type.h; fi
1196 if test x"$extra_headers" = x
1197 then extra_headers=; fi
1199 if test x$md_file = x
1200 then md_file=$cpu_type/$cpu_type.md; fi
1202 if test x$out_file = x
1203 then out_file=$cpu_type/$cpu_type.c; fi
1205 if test x"$tmake_file" = x
1206 then tmake_file=$cpu_type/t-$cpu_type
1209 if test x"$dwarf2" = xyes
1210 then tm_file="$tm_file tm-dwarf2.h"
1213 # Say what files are being used for the output code and MD file.
1214 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1215 echo "Using \`$srcdir/config/$md_file' as machine description file."
1217 # If any of the xm_file variables contain nonexistent files, warn
1218 # about them and drop them.
1221 for x in $build_xm_file; do
1222 if test -f $srcdir/config/$x
1224 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1230 for x in $host_xm_file; do
1231 if test -f $srcdir/config/$x
1233 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1239 for x in $xm_file; do
1240 if test -f $srcdir/config/$x
1242 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1248 for f in $tm_file; do
1251 if test $count = ax; then
1252 echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1254 echo "Using the following target machine macro files:"
1255 for f in $tm_file; do
1256 echo " $srcdir/config/$f"
1260 if test x$need_64bit_hwint = xyes; then
1261 AC_DEFINE(NEED_64BIT_HOST_WIDE_INT, 1,
1262 [Define to 1 if HOST_WIDE_INT must be 64 bits wide (see hwint.h).])
1265 if test x$use_long_long_for_widest_fast_int = xyes; then
1266 AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1267 [Define to 1 if the 'long long' (or '__int64') is wider than 'long' but still
1268 efficiently supported by the host hardware.])
1272 for f in $host_xm_file; do
1275 if test $count = a; then
1277 elif test $count = ax; then
1278 echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1280 echo "Using the following host machine macro files:"
1281 for f in $host_xm_file; do
1282 echo " $srcdir/config/$f"
1285 echo "Using ${out_host_hook_obj} for host machine hooks."
1287 if test "$host_xm_file" != "$build_xm_file"; then
1289 for f in $build_xm_file; do
1292 if test $count = a; then
1294 elif test $count = ax; then
1295 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1297 echo "Using the following build machine macro files:"
1298 for f in $build_xm_file; do
1299 echo " $srcdir/config/$f"
1306 AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1307 gcc_cv_mcontext_underscores,
1309 #include <sys/cdefs.h>
1310 #include <sys/signal.h>
1311 #include <ucontext.h>
1312 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1314 gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1315 if test $gcc_cv_mcontext_underscores = yes; then
1316 AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1317 [mcontext_t fields start with __])
1326 # Check if a valid thread package
1327 case ${enable_threads} in
1330 target_thread_file='single'
1334 target_thread_file='single'
1336 aix | dce | gnat | irix | posix | posix95 | rtems | \
1337 single | solaris | vxworks | win32 | mipssde)
1338 target_thread_file=${enable_threads}
1341 echo "${enable_threads} is an unknown thread package" 1>&2
1346 if test x${thread_file} = x; then
1347 # No thread file set by target-specific clauses in config.gcc,
1348 # so use file chosen by default logic above
1349 thread_file=${target_thread_file}
1352 # Make gthr-default.h if we have a thread file.
1354 if test $thread_file != single; then
1355 echo "#include \"gthr-${thread_file}.h\"" > gthr-default.h-t
1356 if diff gthr-default.h-t gthr-default.h 2>/dev/null; then
1357 rm -f gthr-default.h-t
1359 mv -f gthr-default.h-t gthr-default.h
1361 gthread_flags=-DHAVE_GTHR_DEFAULT
1363 AC_SUBST(gthread_flags)
1370 if test x$enable___cxa_atexit = xyes || \
1371 test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1372 if test x$host = x$target; then
1374 # mingw32 doesn't have __cxa_atexit but uses atexit registration
1375 # keyed to flag_use_cxa_atexit
1380 AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1381 [echo "__cxa_atexit can't be enabled on this target"])
1385 # We can't check for __cxa_atexit when building a cross, so assume
1389 if test x$use_cxa_atexit = xyes; then
1390 AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1391 [Define if you want to use __cxa_atexit, rather than atexit, to
1392 register C++ destructors for local statics and global objects.
1393 This is essential for fully standards-compliant handling of
1394 destructors, but requires __cxa_atexit in libc.])
1398 # Look for a file containing extra machine modes.
1399 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1400 extra_modes_file='$(srcdir)'/config/${extra_modes}
1401 AC_SUBST(extra_modes_file)
1402 AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1403 [Define to the name of a file containing a list of extra machine modes
1404 for this architecture.])
1407 # Convert extra_options into a form suitable for Makefile use.
1409 for f in $extra_options; do
1410 extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1412 AC_SUBST(extra_opt_files)
1414 # auto-host.h is the file containing items generated by autoconf and is
1415 # the first file included by config.h.
1416 # If host=build, it is correct to have bconfig include auto-host.h
1417 # as well. If host!=build, we are in error and need to do more
1418 # work to find out the build config parameters.
1419 if test x$host = x$build
1421 build_auto=auto-host.h
1423 # We create a subdir, then run autoconf in the subdir.
1424 # To prevent recursion we set host and build for the new
1425 # invocation of configure to the build for this invocation
1432 /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1433 *) realsrcdir=../${srcdir};;
1435 saved_CFLAGS="${CFLAGS}"
1436 CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1437 LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1438 ${realsrcdir}/configure \
1439 --enable-languages=${enable_languages-all} \
1440 --target=$target_alias --host=$build_alias --build=$build_alias
1441 CFLAGS="${saved_CFLAGS}"
1443 # We just finished tests for the build machine, so rename
1444 # the file auto-build.h in the gcc directory.
1445 mv auto-host.h ../auto-build.h
1448 build_auto=auto-build.h
1450 AC_SUBST(build_subdir)
1452 tm_file="${tm_file} defaults.h"
1453 tm_p_file="${tm_p_file} tm-preds.h"
1454 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1455 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1456 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1457 # put this back in temporarily.
1458 xm_file="auto-host.h ansidecl.h ${xm_file}"
1465 # Compile in configure arguments.
1466 if test -f configargs.h ; then
1467 # Being re-configured.
1468 gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1469 gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1471 gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1474 # Double all backslashes and backslash all quotes to turn
1475 # gcc_config_arguments into a C string.
1476 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1477 $gcc_config_arguments
1479 gcc_config_arguments_str=`cat conftest.out`
1482 cat > configargs.h <<EOF
1483 /* Generated automatically. */
1484 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1485 static const char thread_model[] = "$thread_file";
1487 static const struct {
1488 const char *name, *value;
1489 } configure_default_options[] = $configure_default_options;
1494 gcc_BASEVER=`cat $srcdir/BASE-VER`
1495 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1496 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1497 if test -f $srcdir/REVISION ; then
1498 gcc_REVISION=`cat $srcdir/REVISION`
1502 cat > plugin-version.h <<EOF
1503 #include "configargs.h"
1505 static char basever[] = "$gcc_BASEVER";
1506 static char datestamp[] = "$gcc_DATESTAMP";
1507 static char devphase[] = "$gcc_DEVPHASE";
1508 static char revision[] = "$gcc_REVISION";
1510 /* FIXME plugins: We should make the version information more precise.
1511 One way to do is to add a checksum. */
1513 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1515 configuration_arguments};
1519 # Internationalization
1520 ZW_GNU_GETTEXT_SISTER_DIR
1522 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1523 # -liconv on the link line twice.
1524 case "$LIBINTL" in *$LIBICONV*)
1528 AC_ARG_ENABLE(secureplt,
1529 [ --enable-secureplt enable -msecure-plt by default for PowerPC],
1532 AC_ARG_ENABLE(leading-mingw64-underscores,
1533 AS_HELP_STRING([--enable-leading-mingw64-underscores],
1534 [Enable leading underscores on 64 bit mingw targets]),
1536 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1537 [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1538 [Define if we should use leading underscore on 64 bit mingw targets])])
1541 [ --enable-cld enable -mcld by default for 32bit x86], [],
1544 AC_ARG_ENABLE(frame-pointer,
1545 [ --enable-frame-pointer enable -fno-omit-frame-pointer by default for 32bit x86], [],
1548 linux* | darwin[[8912]]*)
1549 # Enable -fomit-frame-pointer by default for Linux and Darwin with
1551 enable_frame_pointer=no
1554 enable_frame_pointer=yes
1559 # Windows32 Registry support for specifying GCC installation paths.
1560 AC_ARG_ENABLE(win32-registry,
1561 [ --disable-win32-registry
1562 disable lookup of installation paths in the
1563 Registry on Windows hosts
1564 --enable-win32-registry enable registry lookup (default)
1565 --enable-win32-registry=KEY
1566 use KEY instead of GCC version as the last portion
1567 of the registry key],,)
1570 win32 | pe | cygwin* | mingw32* | uwin*)
1571 if test "x$enable_win32_registry" != xno; then
1572 AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1575 if test "x$enable_win32_registry" != xno; then
1576 AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1577 [Define to 1 if installation paths should be looked up in the Windows
1578 Registry. Ignored on non-Windows hosts.])
1580 if test "x$enable_win32_registry" != xyes \
1581 && test "x$enable_win32_registry" != x; then
1582 AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1583 [Define to be the last component of the Windows registry key under which
1584 to look for installation paths. The full key used will be
1585 HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1586 The default is the GCC version number.])
1592 # Get an absolute path to the GCC top-level source directory
1593 holddir=`${PWDCMD-pwd}`
1595 topdir=`${PWDCMD-pwd}`
1598 # Conditionalize the makefile for this host machine.
1600 for f in ${host_xmake_file}
1602 if test -f ${srcdir}/config/$f
1604 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1608 # Conditionalize the makefile for this target machine.
1610 for f in ${tmake_file}
1612 if test -f ${srcdir}/config/$f
1614 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1617 tmake_file="${tmake_file_}"
1619 out_object_file=`basename $out_file .c`.o
1621 tm_file_list="options.h"
1622 tm_include_list="options.h insn-constants.h"
1623 for f in $tm_file; do
1626 f=`echo $f | sed 's/^..//'`
1627 tm_file_list="${tm_file_list} $f"
1628 tm_include_list="${tm_include_list} $f"
1631 tm_file_list="${tm_file_list} \$(srcdir)/$f"
1632 tm_include_list="${tm_include_list} $f"
1635 tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1636 tm_include_list="${tm_include_list} config/$f"
1643 for f in $tm_p_file; do
1646 tm_p_file_list="${tm_p_file_list} $f"
1647 tm_p_include_list="${tm_p_include_list} $f"
1650 tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1651 tm_p_include_list="${tm_p_include_list} config/$f"
1657 for f in $xm_file; do
1660 xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1661 xm_include_list="${xm_include_list} $f"
1664 xm_file_list="${xm_file_list} $f"
1665 xm_include_list="${xm_include_list} $f"
1668 xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1669 xm_include_list="${xm_include_list} config/$f"
1675 host_xm_include_list=
1676 for f in $host_xm_file; do
1679 host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1680 host_xm_include_list="${host_xm_include_list} $f"
1683 host_xm_file_list="${host_xm_file_list} $f"
1684 host_xm_include_list="${host_xm_include_list} $f"
1687 host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1688 host_xm_include_list="${host_xm_include_list} config/$f"
1694 for f in $build_xm_file; do
1697 build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1698 build_xm_include_list="${build_xm_include_list} $f"
1700 auto-build.h | auto-host.h )
1701 build_xm_file_list="${build_xm_file_list} $f"
1702 build_xm_include_list="${build_xm_include_list} $f"
1705 build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1706 build_xm_include_list="${build_xm_include_list} config/$f"
1711 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1712 # cross-compiler which does not use the native headers and libraries.
1713 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1714 CROSS= AC_SUBST(CROSS)
1715 ALL=all.internal AC_SUBST(ALL)
1716 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1718 if test "x$with_build_sysroot" != x; then
1719 build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1721 # This value is used, even on a native system, because
1722 # CROSS_SYSTEM_HEADER_DIR is just
1723 # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1724 build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1727 if test x$host != x$target
1729 CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1731 SYSTEM_HEADER_DIR=$build_system_header_dir
1732 case "$host","$target" in
1733 # Darwin crosses can use the host system's libraries and headers,
1734 # because of the fat library support. Of course, it must be the
1735 # same version of Darwin on both sides. Allow the user to
1736 # just say --target=foo-darwin without a version number to mean
1737 # "the version on this system".
1738 *-*-darwin*,*-*-darwin*)
1739 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1740 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1741 if test $hostos = $targetos -o $targetos = darwin ; then
1743 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1748 i?86-*-*,x86_64-*-* \
1749 | powerpc*-*-*,powerpc64*-*-*)
1750 CROSS="$CROSS -DNATIVE_CROSS" ;;
1752 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1753 SYSTEM_HEADER_DIR=$build_system_header_dir
1756 # If this is a cross-compiler that does not
1757 # have its own set of headers then define
1760 # If this is using newlib, without having the headers available now,
1761 # then define inhibit_libc in LIBGCC2_CFLAGS.
1762 # This prevents libgcc2 from containing any code which requires libc
1764 : ${inhibit_libc=false}
1765 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1766 test x$with_newlib = xyes ; } &&
1767 { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
1770 AC_SUBST(inhibit_libc)
1772 # When building gcc with a cross-compiler, we need to adjust things so
1773 # that the generator programs are still built with the native compiler.
1774 # Also, we cannot run fixincludes.
1776 # These are the normal (build=host) settings:
1777 CC_FOR_BUILD='$(CC)' AC_SUBST(CC_FOR_BUILD)
1778 BUILD_CFLAGS='$(ALL_CFLAGS)' AC_SUBST(BUILD_CFLAGS)
1779 BUILD_LDFLAGS='$(LDFLAGS)' AC_SUBST(BUILD_LDFLAGS)
1780 STMP_FIXINC=stmp-fixinc AC_SUBST(STMP_FIXINC)
1782 # And these apply if build != host, or we are generating coverage data
1783 if test x$build != x$host || test "x$coverage_flags" != x
1785 BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1786 BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
1789 # Expand extra_headers to include complete path.
1790 # This substitutes for lots of t-* files.
1792 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1793 for file in ${extra_headers} ; do
1794 extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1797 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
1798 if test x"$use_gcc_tgmath" = xyes
1799 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
1802 # Define collect2 in Makefile.
1803 case $host_can_use_collect2 in
1805 *) collect2='collect2$(exeext)' ;;
1807 AC_SUBST([collect2])
1809 # Add a definition of USE_COLLECT2 if system wants one.
1810 case $use_collect2 in
1811 no) use_collect2= ;;
1814 host_xm_defines="${host_xm_defines} USE_COLLECT2"
1815 xm_defines="${xm_defines} USE_COLLECT2"
1816 case $host_can_use_collect2 in
1818 AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1824 # ---------------------------
1825 # Assembler & linker features
1826 # ---------------------------
1828 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
1829 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
1830 # However when ld-new is first executed from the build tree, libtool will
1831 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
1832 # to the build tree. While doing this we need to use the previous-stage
1833 # linker, or we have an infinite loop. The presence of a shell script as
1834 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
1835 # the gcc/collect-ld script. So we need to know how libtool works, or
1836 # exec-tool will fail.
1838 m4_defun([_LT_CONFIG_COMMANDS], [])
1841 AC_SUBST(enable_fast_install)
1843 # Identify the assembler which will work hand-in-glove with the newly
1844 # built GCC, so that we can examine its features. This is the assembler
1845 # which will be driven by the driver program.
1847 # If build != host, and we aren't building gas in-tree, we identify a
1848 # build->target assembler and hope that it will have the same features
1849 # as the host->target assembler we'll be using.
1850 gcc_cv_gas_major_version=
1851 gcc_cv_gas_minor_version=
1852 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
1854 m4_pattern_allow([AS_FOR_TARGET])dnl
1855 AS_VAR_SET_IF(gcc_cv_as,, [
1856 if test -x "$DEFAULT_ASSEMBLER"; then
1857 gcc_cv_as="$DEFAULT_ASSEMBLER"
1858 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
1859 && test -f ../gas/Makefile \
1860 && test x$build = x$host; then
1861 gcc_cv_as=../gas/as-new$build_exeext
1862 elif test -x as$build_exeext; then
1863 # Build using assembler in the current directory.
1864 gcc_cv_as=./as$build_exeext
1865 elif test -x $AS_FOR_TARGET; then
1866 gcc_cv_as="$AS_FOR_TARGET"
1868 AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
1871 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
1872 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
1873 case "$ORIGINAL_AS_FOR_TARGET" in
1874 ./as | ./as$build_exeext) ;;
1875 *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
1878 AC_MSG_CHECKING(what assembler to use)
1879 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
1880 # Single tree build which includes gas. We want to prefer it
1881 # over whatever linker top-level may have detected, since
1882 # we'll use what we're building after installation anyway.
1883 AC_MSG_RESULT(newly built gas)
1885 _gcc_COMPUTE_GAS_VERSION
1886 in_tree_gas_is_elf=no
1887 if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
1888 || (grep 'obj_format = multi' ../gas/Makefile \
1889 && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
1891 in_tree_gas_is_elf=yes
1894 AC_MSG_RESULT($gcc_cv_as)
1898 # Identify the linker which will work hand-in-glove with the newly
1899 # built GCC, so that we can examine its features. This is the linker
1900 # which will be driven by the driver program.
1902 # If build != host, and we aren't building gas in-tree, we identify a
1903 # build->target linker and hope that it will have the same features
1904 # as the host->target linker we'll be using.
1905 gcc_cv_gld_major_version=
1906 gcc_cv_gld_minor_version=
1907 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
1908 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
1910 AS_VAR_SET_IF(gcc_cv_ld,, [
1911 if test -x "$DEFAULT_LINKER"; then
1912 gcc_cv_ld="$DEFAULT_LINKER"
1913 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
1914 && test -f ../ld/Makefile \
1915 && test x$build = x$host; then
1916 gcc_cv_ld=../ld/ld-new$build_exeext
1917 elif test -x collect-ld$build_exeext; then
1918 # Build using linker in the current directory.
1919 gcc_cv_ld=./collect-ld$build_exeext
1920 elif test -x $LD_FOR_TARGET; then
1921 gcc_cv_ld="$LD_FOR_TARGET"
1923 AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
1926 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
1927 PLUGIN_LD=`basename $gcc_cv_ld`
1928 AC_ARG_WITH(plugin-ld,
1929 [ --with-plugin-ld=[[ARG]] specify the plugin linker],
1930 [if test x"$withval" != x; then
1931 ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
1932 PLUGIN_LD="$withval"
1934 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
1935 AC_DEFINE_UNQUOTED(PLUGIN_LD, "$PLUGIN_LD", [Specify plugin linker])
1937 # Check to see if we are using gold instead of ld
1938 AC_MSG_CHECKING(whether we are using gold)
1940 if test x$gcc_cv_ld != x; then
1941 if $gcc_cv_ld --version 2>/dev/null | sed 1q \
1942 | grep "GNU gold" > /dev/null; then
1946 AC_MSG_RESULT($ld_is_gold)
1948 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
1949 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
1950 case "$ORIGINAL_LD_FOR_TARGET" in
1951 ./collect-ld | ./collect-ld$build_exeext) ;;
1952 *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
1955 AC_MSG_CHECKING(what linker to use)
1956 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext; then
1957 # Single tree build which includes ld. We want to prefer it
1958 # over whatever linker top-level may have detected, since
1959 # we'll use what we're building after installation anyway.
1960 AC_MSG_RESULT(newly built ld)
1962 in_tree_ld_is_elf=no
1963 if (grep 'EMUL = .*elf' ../ld/Makefile \
1964 || grep 'EMUL = .*linux' ../ld/Makefile \
1965 || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
1966 in_tree_ld_is_elf=yes
1968 for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in
1971 gcc_cv_gld_version=`sed -n -e 's/^[ ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
1972 if test x$gcc_cv_gld_version != x; then
1976 gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
1977 gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
1980 AC_MSG_RESULT($gcc_cv_ld)
1984 # Figure out what nm we will be using.
1985 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
1986 AS_VAR_SET_IF(gcc_cv_nm,, [
1987 if test -f $gcc_cv_binutils_srcdir/configure.in \
1988 && test -f ../binutils/Makefile \
1989 && test x$build = x$host; then
1990 gcc_cv_nm=../binutils/nm-new$build_exeext
1991 elif test -x nm$build_exeext; then
1992 gcc_cv_nm=./nm$build_exeext
1993 elif test -x $NM_FOR_TARGET; then
1994 gcc_cv_nm="$NM_FOR_TARGET"
1996 AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
1999 AC_MSG_CHECKING(what nm to use)
2000 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2001 # Single tree build which includes binutils.
2002 AC_MSG_RESULT(newly built nm)
2005 AC_MSG_RESULT($gcc_cv_nm)
2009 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2010 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2011 case "$ORIGINAL_NM_FOR_TARGET" in
2012 ./nm | ./nm$build_exeext) ;;
2013 *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2017 # Figure out what objdump we will be using.
2018 AS_VAR_SET_IF(gcc_cv_objdump,, [
2019 if test -f $gcc_cv_binutils_srcdir/configure.in \
2020 && test -f ../binutils/Makefile \
2021 && test x$build = x$host; then
2022 # Single tree build which includes binutils.
2023 gcc_cv_objdump=../binutils/objdump$build_exeext
2024 elif test -x objdump$build_exeext; then
2025 gcc_cv_objdump=./objdump$build_exeext
2026 elif test -x $OBJDUMP_FOR_TARGET; then
2027 gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2029 AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2032 AC_MSG_CHECKING(what objdump to use)
2033 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2034 # Single tree build which includes binutils.
2035 AC_MSG_RESULT(newly built objdump)
2036 elif test x$gcc_cv_objdump = x; then
2037 AC_MSG_RESULT(not found)
2039 AC_MSG_RESULT($gcc_cv_objdump)
2042 # Figure out what readelf we will be using.
2043 AS_VAR_SET_IF(gcc_cv_readelf,, [
2044 if test -f $gcc_cv_binutils_srcdir/configure.in \
2045 && test -f ../binutils/Makefile \
2046 && test x$build = x$host; then
2047 # Single tree build which includes binutils.
2048 gcc_cv_readelf=../binutils/readelf$build_exeext
2049 elif test -x readelf$build_exeext; then
2050 gcc_cv_readelf=./readelf$build_exeext
2052 AC_PATH_PROG(gcc_cv_readelf, readelf)
2055 AC_MSG_CHECKING(what readelf to use)
2056 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2057 # Single tree build which includes binutils.
2058 AC_MSG_RESULT(newly built readelf)
2059 elif test x$gcc_cv_readelf = x; then
2060 AC_MSG_RESULT(not found)
2062 AC_MSG_RESULT($gcc_cv_readelf)
2065 # Figure out what assembler alignment features are present.
2066 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2070 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2071 [Define if your assembler supports .balign and .p2align.])])
2073 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2076 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2077 [Define if your assembler supports specifying the maximum number
2078 of bytes to skip when using the GAS .p2align command.])])
2080 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2083 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2084 [Define if your assembler supports .literal16.])])
2086 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2088 [conftest_label1: .word 0
2090 conftest_label2: .word 0
2092 [if test x$gcc_cv_nm != x; then
2093 $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2094 $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2095 if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2097 else gcc_cv_as_subsection_m1=yes
2099 rm -f conftest.nm1 conftest.nm2
2101 [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2102 [Define if your assembler supports .subsection and .subsection -1 starts
2103 emitting at the beginning of your section.])])
2105 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2108 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2110 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2112 [ .weakref foobar, barfnot],,
2113 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2115 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2118 .NSUBSPA $CODE$,COMDAT],,
2119 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2121 # .hidden needs to be supported in both the assembler and the linker,
2122 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2123 # This is irritatingly difficult to feature test for; we have to check the
2124 # date string after the version number. If we've got an in-tree
2125 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2127 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2128 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2132 # Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with
2133 # STV_HIDDEN, so disable .hidden support if so.
2136 if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then
2137 cat > conftest.s <<EOF
2144 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
2145 && $gcc_cv_objdump -t conftest.o 2>/dev/null | \
2146 grep '\.hidden default' > /dev/null; then
2149 gcc_cv_as_hidden=yes
2152 # Assume bug is present if objdump is missing.
2157 gcc_cv_as_hidden=yes
2161 # gnu_indirect_function type is an extension proposed at
2162 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2163 # selection of function implementation
2164 gcc_GAS_CHECK_FEATURE(gnu_indirect_function, gcc_cv_as_indirect_function,
2166 [ .type Foo, @gnu_indirect_function
2168 GCC_TARGET_TEMPLATE([HAVE_GAS_INDIRECT_FUNCTION])
2169 if test $gcc_cv_as_indirect_function = yes ; then
2170 AC_DEFINE(HAVE_GAS_INDIRECT_FUNCTION, 1,
2171 [Define if your assembler supports indirect function type.])
2175 if test $in_tree_ld != yes ; then
2176 ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2177 if test x"$ld_is_gold" = xyes; then
2178 gcc_cv_ld_hidden=yes
2179 elif echo "$ld_ver" | grep GNU > /dev/null; then
2180 ld_vers=`echo $ld_ver | sed -n \
2181 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2182 ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2183 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2184 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2185 ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2190 # Solaris 2 ld -V output looks like this for a regular version:
2192 # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
2194 # but test versions add stuff at the end:
2196 # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
2198 ld_ver=`$gcc_cv_ld -V 2>&1`
2199 if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2200 ld_vers=`echo $ld_ver | sed -n \
2201 -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2202 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2203 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2211 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2212 [[if test $in_tree_ld = yes ; then
2214 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2215 && test $in_tree_ld_is_elf = yes; then
2216 gcc_cv_ld_hidden=yes
2219 gcc_cv_ld_hidden=yes
2220 if echo "$ld_ver" | grep GNU > /dev/null; then
2221 if test 0"$ld_date" -lt 20020404; then
2222 if test -n "$ld_date"; then
2223 # If there was date string, but was earlier than 2002-04-04, fail
2225 elif test -z "$ld_vers"; then
2226 # If there was no date string nor ld version number, something is wrong
2229 test -z "$ld_vers_patch" && ld_vers_patch=0
2230 if test "$ld_vers_major" -lt 2; then
2232 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2233 gcc_cv_ld_hidden="no"
2234 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2241 hppa64*-*-hpux* | ia64*-*-hpux*)
2242 gcc_cv_ld_hidden=yes
2244 *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
2245 # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2246 # .symbolic was only added in Solaris 9 12/02.
2247 gcc_cv_ld_hidden=yes
2255 libgcc_visibility=no
2256 AC_SUBST(libgcc_visibility)
2257 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2258 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2259 libgcc_visibility=yes
2260 AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2261 [Define if your assembler and linker support .hidden.])
2264 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2265 gcc_cv_ld_ro_rw_mix=unknown
2266 if test $in_tree_ld = yes ; then
2267 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2268 && test $in_tree_ld_is_elf = yes; then
2269 gcc_cv_ld_ro_rw_mix=read-write
2271 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2272 echo '.section myfoosect, "a"' > conftest1.s
2273 echo '.section myfoosect, "aw"' > conftest2.s
2274 echo '.byte 1' >> conftest2.s
2275 echo '.section myfoosect, "a"' > conftest3.s
2276 echo '.byte 0' >> conftest3.s
2277 if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2278 && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2279 && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2280 && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2281 conftest2.o conftest3.o > /dev/null 2>&1; then
2282 gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2283 | sed -e '/myfoosect/!d' -e N`
2284 if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2285 if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2286 gcc_cv_ld_ro_rw_mix=read-only
2288 gcc_cv_ld_ro_rw_mix=read-write
2293 rm -f conftest.* conftest[123].*
2296 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2297 AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2298 [Define if your linker links a mix of read-only
2299 and read-write sections into a read-write section.])
2301 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2303 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2304 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2312 [[# GAS versions before 2.11 do not support uleb128,
2313 # despite appearing to.
2314 # ??? There exists an elf-specific test that will crash
2315 # the assembler. Perhaps it's better to figure out whether
2316 # arbitrary sections are supported and try the test.
2317 as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2318 if echo "$as_ver" | grep GNU > /dev/null; then
2319 as_vers=`echo $as_ver | sed -n \
2320 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2321 as_major=`expr "$as_vers" : '\([0-9]*\)'`
2322 as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2323 if test $as_major -eq 2 && test $as_minor -lt 11
2325 else gcc_cv_as_leb128=yes
2328 [AC_DEFINE(HAVE_AS_LEB128, 1,
2329 [Define if your assembler supports .sleb128 and .uleb128.])])
2331 # Check if we have assembler support for unwind directives.
2332 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2339 .cfi_escape 1, 2, 3, 4, 5
2343 # If the linker used on Solaris (like Sun ld) isn't capable of merging
2344 # read-only and read-write sections, we need to make sure that the
2345 # assembler used emits read-write .eh_frame sections.
2346 if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2347 if test "x$gcc_cv_objdump" != x; then
2348 if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2349 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2350 gcc_cv_as_cfi_directive=no
2353 i?86-*-solaris2.1[[0-9]]*)
2354 # On Solaris/x86, make sure that GCC and gas agree on using
2355 # read-only .eh_frame sections for 64-bit.
2356 if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
2357 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2358 sed -e /.eh_frame/!d -e N | \
2359 grep READONLY > /dev/null; then
2360 gcc_cv_as_cfi_directive=yes
2362 gcc_cv_as_cfi_directive=no
2366 gcc_cv_as_cfi_directive=yes
2371 # no objdump, err on the side of caution
2372 gcc_cv_as_cfi_directive=no
2375 gcc_cv_as_cfi_directive=yes
2379 gcc_cv_as_cfi_directive=yes
2382 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2383 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2387 .cfi_adjust_cfa_offset 64
2389 .cfi_adjust_cfa_offset 128
2392 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2393 | grep 'DW_CFA_advance_loc[24]:[ ][ ]*75040[ ]' >/dev/null; then
2394 gcc_cv_as_cfi_advance_working=yes
2398 # no objdump, err on the side of caution
2399 gcc_cv_as_cfi_advance_working=no
2401 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2402 [`if test $gcc_cv_as_cfi_directive = yes \
2403 && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2404 [Define 0/1 if your assembler supports CFI directives.])
2406 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2407 gcc_cv_as_cfi_personality_directive, ,,
2410 .cfi_personality 0, symbol
2412 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2413 [`if test $gcc_cv_as_cfi_personality_directive = yes;
2414 then echo 1; else echo 0; fi`],
2415 [Define 0/1 if your assembler supports .cfi_personality.])
2417 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2418 gcc_cv_as_cfi_sections_directive, ,,
2420 .cfi_sections .debug_frame, .eh_frame
2424 win32 | pe | cygwin* | mingw32* | uwin*)
2425 # Need to check that we generated the correct relocation for the
2426 # .debug_frame section. This was fixed for binutils 2.21.
2427 gcc_cv_as_cfi_sections_directive=no
2428 if test "x$gcc_cv_objdump" != x; then
2429 if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2430 grep secrel > /dev/null; then
2431 gcc_cv_as_cfi_sections_directive=yes
2436 gcc_cv_as_cfi_sections_directive=yes
2439 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2440 [`if test $gcc_cv_as_cfi_sections_directive = yes;
2441 then echo 1; else echo 0; fi`],
2442 [Define 0/1 if your assembler supports .cfi_sections.])
2444 # GAS versions up to and including 2.11.0 may mis-optimize
2446 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2454 .section .eh_frame,"aw",@progbits
2456 .4byte .LECIE1-.LSCIE1
2470 .4byte .LEFDE1-.LASFDE1
2472 .4byte .LASFDE1-__FRAME_BEGIN__
2480 [ dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2481 cat > conftest.lit <<EOF
2482 0000 10000000 00000000 017a0001 781a0004 .........z..x...
2483 0010 01000000 12000000 18000000 00000000 ................
2484 0020 08000000 04080000 0044 .........D @&t@
2486 cat > conftest.big <<EOF
2487 0000 00000010 00000000 017a0001 781a0004 .........z..x...
2488 0010 00000001 00000012 00000018 00000000 ................
2489 0020 00000008 04000000 0844 .........D @&t@
2491 # If the assembler didn't choke, and we can objdump,
2492 # and we got the correct data, then succeed.
2493 # The text in the here-document typically retains its unix-style line
2494 # endings, while the output of objdump will use host line endings.
2495 # Therefore, use diff -b for the comparisons.
2496 if test x$gcc_cv_objdump != x \
2497 && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2498 | tail -3 > conftest.got \
2499 && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2500 || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2502 gcc_cv_as_eh_frame=yes
2503 elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2504 gcc_cv_as_eh_frame=buggy
2506 # Uh oh, what do we do now?
2507 gcc_cv_as_eh_frame=no
2510 if test $gcc_cv_as_eh_frame = buggy; then
2511 AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2512 [Define if your assembler mis-optimizes .eh_frame data.])
2515 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2516 [elf,2,12,0], [--fatal-warnings],
2517 [.section .rodata.str, "aMS", @progbits, 1])
2518 if test $gcc_cv_as_shf_merge = no; then
2519 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2520 [elf,2,12,0], [--fatal-warnings],
2521 [.section .rodata.str, "aMS", %progbits, 1])
2523 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2524 [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2525 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2527 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group,
2528 [elf,2,16,0], [--fatal-warnings],
2529 [.section .text,"axG",@progbits,.foo,comdat])
2530 if test $gcc_cv_as_comdat_group = yes; then
2531 gcc_cv_as_comdat_group_percent=no
2533 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group_percent,
2534 [elf,2,16,0], [--fatal-warnings],
2535 [.section .text,"axG",%progbits,.foo,comdat])
2537 if test x"$ld_is_gold" = xyes; then
2539 elif test $in_tree_ld = yes ; then
2541 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2542 && test $in_tree_ld_is_elf = yes; then
2545 elif echo "$ld_ver" | grep GNU > /dev/null; then
2547 if test 0"$ld_date" -lt 20050308; then
2548 if test -n "$ld_date"; then
2549 # If there was date string, but was earlier than 2005-03-08, fail
2551 elif test "$ld_vers_major" -lt 2; then
2553 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2560 *-*-solaris2.1[1-9]*)
2561 # Sun ld has COMDAT group support since Solaris 9, but it doesn't
2562 # interoperate with GNU as until Solaris 11 build 130, i.e. ld
2565 # FIXME: Maybe need to refine later when COMDAT group support with
2566 # Sun as is implemented.
2567 if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 1688; then
2574 # Assume linkers other than GNU ld don't support COMDAT group.
2580 # Allow overriding the automatic COMDAT group tests above.
2581 AC_ARG_ENABLE(comdat,
2582 [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
2583 [comdat_group="$enable_comdat"])
2584 if test $comdat_group = no; then
2585 gcc_cv_as_comdat_group=no
2586 gcc_cv_as_comdat_group_percent=no
2588 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2589 [`if test $gcc_cv_as_comdat_group = yes || test $gcc_cv_as_comdat_group_percent = yes; then echo 1; else echo 0; fi`],
2590 [Define 0/1 if your assembler and linker support COMDAT groups.])
2592 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2593 gcc_cv_as_discriminator,
2597 .loc 1 1 0 discriminator 1],,
2598 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2599 [Define if your assembler supports the .loc discriminator sub-directive.])])
2601 # Thread-local storage - the check is heavily parameterized.
2610 .section ".tdata","awT",@progbits
2613 ldq $27,__tls_get_addr($29) !literal!1
2614 lda $16,foo($29) !tlsgd!1
2615 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
2616 ldq $27,__tls_get_addr($29) !literal!2
2617 lda $16,foo($29) !tlsldm!2
2618 jsr $26,($27),__tls_get_addr !lituse_tlsldm!2
2619 ldq $1,foo($29) !gotdtprel
2620 ldah $2,foo($29) !dtprelhi
2621 lda $3,foo($2) !dtprello
2622 lda $4,foo($29) !dtprel
2623 ldq $1,foo($29) !gottprel
2624 ldah $2,foo($29) !tprelhi
2625 lda $3,foo($2) !tprello
2626 lda $4,foo($29) !tprel'
2629 tls_as_opt=--fatal-warnings
2631 cris-*-*|crisv32-*-*)
2633 .section ".tdata","awT",@progbits
2640 tls_as_opt=--fatal-warnings
2644 .section ".tdata","awT",@progbits
2656 .section ".tdata","awT",@progbits
2660 addil LT%foo-$tls_gdidx$,gp
2661 ldo RT%foo-$tls_gdidx$(%r1),%arg0
2664 addil LT%foo-$tls_ldidx$,gp
2666 ldo RT%foo-$tls_ldidx$(%r1),%arg0
2667 addil LR%foo-$tls_dtpoff$,%ret0
2668 ldo RR%foo-$tls_dtpoff$(%r1),%t1
2670 addil LT%foo-$tls_ieoff$,gp
2671 ldw RT%foo-$tls_ieoff$(%r1),%t2
2674 addil LR%foo-$tls_leoff$,%t1
2675 ldo RR%foo-$tls_leoff$(%r1),%t2'
2678 tls_as_opt=--fatal-warnings
2682 .section ".tdata","awT",%progbits
2695 i[34567]86-*-solaris2.*)
2697 tga_func=___tls_get_addr
2703 if test x$on_solaris = xyes && test x$gas_flag = xno; then
2705 .section .tdata,"awt",@progbits'
2709 AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
2710 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
2714 .section ".tdata","awT",@progbits'
2717 tls_as_opt="--fatal-warnings"
2719 conftest_s="$conftest_s
2723 leal foo@tlsgd(,%ebx,1), %eax
2724 leal foo@tlsldm(%ebx), %eax
2725 leal foo@dtpoff(%eax), %edx
2726 movl foo@gottpoff(%ebx), %eax
2727 subl foo@gottpoff(%ebx), %eax
2728 addl foo@gotntpoff(%ebx), %eax
2729 movl foo@indntpoff, %eax
2730 movl \$foo@tpoff, %eax
2731 subl \$foo@tpoff, %eax
2732 leal foo@ntpoff(%ecx), %eax"
2736 .section ".tdata","awT",@progbits
2740 leaq foo@TLSGD(%rip), %rdi
2741 leaq foo@TLSLD(%rip), %rdi
2742 leaq foo@DTPOFF(%rax), %rdx
2743 movq foo@GOTTPOFF(%rip), %rax
2744 movq $foo@TPOFF, %rax'
2747 tls_as_opt=--fatal-warnings
2751 .section ".tdata","awT",@progbits
2754 addl r16 = @ltoff(@dtpmod(foo#)), gp
2755 addl r17 = @ltoff(@dtprel(foo#)), gp
2756 addl r18 = @ltoff(@tprel(foo#)), gp
2757 addl r19 = @dtprel(foo#), gp
2758 adds r21 = @dtprel(foo#), r13
2759 movl r23 = @dtprel(foo#)
2760 addl r20 = @tprel(foo#), gp
2761 adds r22 = @tprel(foo#), r13
2762 movl r24 = @tprel(foo#)'
2765 tls_as_opt=--fatal-warnings
2769 .section .tdata,"awT",@progbits
2773 addiu $4, $28, %tlsgd(x)
2774 addiu $4, $28, %tlsldm(x)
2775 lui $4, %dtprel_hi(x)
2776 addiu $4, $4, %dtprel_lo(x)
2777 lw $4, %gottprel(x)($28)
2778 lui $4, %tprel_hi(x)
2779 addiu $4, $4, %tprel_lo(x)'
2782 tls_as_opt='-32 --fatal-warnings'
2786 .section .tdata,"awT",@progbits
2791 move.l x@TLSGD(%a5),%a0
2792 move.l x@TLSLDM(%a5),%a0
2793 move.l x@TLSLDO(%a5),%a0
2794 move.l x@TLSIE(%a5),%a0
2795 move.l x@TLSLE(%a5),%a0'
2798 tls_as_opt='--fatal-warnings'
2802 .section ".tdata","awT",@progbits
2810 addi 3,31,ld0@got@tlsgd
2812 addi 3,31,x1@got@tlsld
2815 addis 9,3,x2@dtprel@ha
2816 addi 9,9,x2@dtprel@l
2817 lwz 9,x3@got@tprel(31)
2820 addis 9,2,x2@tprel@ha
2821 addi 9,9,x2@tprel@l'
2824 tls_as_opt="-a32 --fatal-warnings"
2828 .section ".tdata","awT",@progbits
2836 addi 3,2,ld0@got@tlsgd
2842 addi 3,2,x1@got@tlsld
2848 addis 9,3,x2@dtprel@ha
2849 addi 9,9,x2@dtprel@l
2852 ld 9,x3@got@dtprel(2)
2858 tls_as_opt="-a64 --fatal-warnings"
2862 .section ".tdata","awT",@progbits
2871 l %r1,foo@GOTNTPOFF(%r12)
2872 l %r1,0(%r1):tls_load:foo
2873 bas %r14,0(%r1,%r13):tls_gdcall:foo
2874 bas %r14,0(%r1,%r13):tls_ldcall:foo'
2877 tls_as_opt="-m31 --fatal-warnings"
2881 .section ".tdata","awT",@progbits
2889 lg %r1,foo@GOTNTPOFF(%r12)
2890 larl %r1,foo@INDNTPOFF
2891 brasl %r14,__tls_get_offset@PLT:tls_gdcall:foo
2892 brasl %r14,__tls_get_offset@PLT:tls_ldcall:foo'
2895 tls_as_opt="-m64 -Aesame --fatal-warnings"
2897 sh-*-* | sh[34]-*-*)
2899 .section ".tdata","awT",@progbits
2909 tls_as_opt=--fatal-warnings
2913 sparc*-sun-solaris2.*)
2915 tga_func=__tls_get_addr
2921 if test x$on_solaris = xyes && test x$gas_flag = xno; then
2923 .section ".tdata",#alloc,#write,#tls'
2928 .section ".tdata","awT",@progbits'
2931 tls_as_opt="-32 --fatal-warnings"
2933 conftest_s="$conftest_s
2936 sethi %tgd_hi22(foo), %o0
2937 add %o0, %tgd_lo10(foo), %o1
2938 add %l7, %o1, %o0, %tgd_add(foo)
2939 call __tls_get_addr, %tgd_call(foo)
2940 sethi %tldm_hi22(foo), %l1
2941 add %l1, %tldm_lo10(foo), %l2
2942 add %l7, %l2, %o0, %tldm_add(foo)
2943 call __tls_get_addr, %tldm_call(foo)
2944 sethi %tldo_hix22(foo), %l3
2945 xor %l3, %tldo_lox10(foo), %l4
2946 add %o0, %l4, %l5, %tldo_add(foo)
2947 sethi %tie_hi22(foo), %o3
2948 add %o3, %tie_lo10(foo), %o3
2949 ld [%l7 + %o3], %o2, %tie_ld(foo)
2950 add %g7, %o2, %o4, %tie_add(foo)
2951 sethi %tle_hix22(foo), %l1
2952 xor %l1, %tle_lox10(foo), %o5
2953 ld [%g7 + %o5], %o1"
2957 .section ".tdata","awT",@progbits
2960 movi a8, foo@TLSFUNC
2961 movi a10, foo@TLSARG
2962 callx8.tls a8, foo@TLSCALL'
2969 if test "x$enable_tls" = xno ; then
2970 : # TLS explicitly disabled.
2971 elif test "x$enable_tls" = xyes ; then
2972 set_have_as_tls=yes # TLS explicitly enabled.
2973 elif test -z "$tls_first_major"; then
2974 : # If we don't have a check, assume no support.
2976 gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
2977 [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
2978 [set_have_as_tls=yes])
2981 # TLS was introduced in the Solaris 9 FCS release and backported to
2982 # Solaris 8 patches. Support for GNU-style TLS on x86 was only
2983 # introduced in Solaris 9 4/04, replacing the earlier Sun style that Sun
2984 # ld and GCC don't support any longer.
2986 AC_MSG_CHECKING(linker and ld.so.1 TLS support)
2988 # Check ld and ld.so.1 TLS support.
2989 if echo "$ld_ver" | grep GNU > /dev/null; then
2990 # Assume all interesting versions of GNU ld have TLS support.
2991 # FIXME: still need ld.so.1 support, i.e. ld version checks below.
2995 # Solaris 8/x86 ld has GNU style TLS support since version 1.280.
2997 min_tls_ld_vers_minor=280
2999 # Solaris 8/SPARC ld has TLS support since version 1.272.
3000 sparc*-*-solaris2.8)
3001 min_tls_ld_vers_minor=272
3003 # Solaris 9/x86 ld has GNU style TLS support since version 1.374.
3005 min_tls_ld_vers_minor=374
3007 # Solaris 9/SPARC and Solaris 10+ ld have TLS support since FCS.
3008 sparc*-*-solaris2.9 | *-*-solaris2.1[[0-9]]*)
3009 min_tls_ld_vers_minor=343
3012 if test "$ls_vers_major" -gt 1 || \
3013 test "$ld_vers_minor" -ge "$min_tls_ld_vers_minor"; then
3019 AC_MSG_RESULT($ld_tls_support)
3022 save_LDFLAGS="$LDFLAGS"
3026 AC_MSG_CHECKING(alternate thread library)
3028 # TLS support was backported to Solaris 8 patches, but only lives in
3029 # the alternate thread library which became the default in Solaris 9.
3030 # We want to always use that, irrespective of TLS support.
3032 # Take multilib subdir into account. There's no spec to handle
3033 # this. The 64 symlink exists since Solaris 8.
3034 lwp_dir=/usr/lib/lwp
3035 lwp_spec="-L$lwp_dir%{m64:/64} -R$lwp_dir%{m64:/64}"
3036 LDFLAGS="-L$lwp_dir -R$lwp_dir"
3043 # Always define LIB_THREAD_LDFLAGS_SPEC, even without TLS support.
3044 AC_DEFINE_UNQUOTED(LIB_THREAD_LDFLAGS_SPEC, "$lwp_spec",
3045 [Define to the linker flags to use for -pthread.])
3046 AC_MSG_RESULT($lwp_dir)
3048 AC_MSG_CHECKING(library containing $tga_func)
3049 # Before Solaris 10, __tls_get_addr (SPARC/x64) resp. ___tls_get_addr
3050 # (32-bit x86) only lived in libthread, so check for that. Keep
3051 # set_have_as_tls if found, disable if not.
3052 AC_SEARCH_LIBS([$tga_func], [thread],, [set_have_as_tls=no])
3053 # Clear LIBS if we cannot support TLS.
3054 if test $set_have_as_tls = no; then
3057 # Always define LIB_TLS_SPEC, even without TLS support.
3058 AC_DEFINE_UNQUOTED(LIB_TLS_SPEC, "$LIBS",
3059 [Define to the library containing __tls_get_addr/___tls_get_addr.])
3060 AC_MSG_RESULT($LIBS)
3063 LDFLAGS="$save_LDFLAGS"
3066 if test $set_have_as_tls = yes ; then
3067 AC_DEFINE(HAVE_AS_TLS, 1,
3068 [Define if your assembler and linker support thread-local storage.])
3071 # Target-specific assembler checks.
3073 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3074 gcc_cv_ld_static_dynamic=no
3075 if test $in_tree_ld = yes ; then
3076 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3077 gcc_cv_ld_static_dynamic=yes
3079 elif test x$gcc_cv_ld != x; then
3080 # Check if linker supports -Bstatic/-Bdynamic option
3081 if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3082 && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3083 gcc_cv_ld_static_dynamic=yes
3086 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3087 AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3088 [Define if your linker supports -Bstatic/-Bdynamic option.])
3090 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3092 if test x"$demangler_in_ld" = xyes; then
3093 AC_MSG_CHECKING(linker --demangle support)
3094 gcc_cv_ld_demangle=no
3095 if test $in_tree_ld = yes; then
3096 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3097 gcc_cv_ld_demangle=yes
3099 elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3100 # Check if the GNU linker supports --demangle option
3101 if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3102 gcc_cv_ld_demangle=yes
3105 if test x"$gcc_cv_ld_demangle" = xyes; then
3106 AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3107 [Define if your linker supports --demangle option.])
3109 AC_MSG_RESULT($gcc_cv_ld_demangle)
3113 # All TARGET_ABI_OSF targets.
3114 alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
3115 gcc_GAS_CHECK_FEATURE([explicit relocation support],
3116 gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3119 extbl $3, $2, $3 !lituse_bytoff!1
3120 ldq $2, a($29) !literal!1
3121 ldq $4, b($29) !literal!2
3122 ldq_u $3, 0($2) !lituse_base!1
3123 ldq $27, f($29) !literal!5
3124 jsr $26, ($27), f !lituse_jsr!5
3125 ldah $29, 0($26) !gpdisp!3
3126 lda $0, c($29) !gprel
3127 ldah $1, d($29) !gprelhigh
3128 lda $1, d($1) !gprellow
3129 lda $29, 0($29) !gpdisp!3],,
3130 [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3131 [Define if your assembler supports explicit relocations.])])
3132 gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3133 gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3136 ldq $27, a($29) !literal!1
3137 jsr $26, ($27), a !lituse_jsrdirect!1],,
3138 [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3139 [Define if your assembler supports the lituse_jsrdirect relocation.])])
3143 gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3144 gcc_cv_as_cris_no_mul_bug,[2,15,91],
3145 [-no-mul-bug-abort], [.text],,
3146 [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3147 [Define if your assembler supports the -no-mul-bug-abort option.])])
3151 gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3152 [.register %g2, #scratch],,
3153 [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3154 [Define if your assembler supports .register.])])
3156 gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3158 [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3159 [Define if your assembler supports -relax option.])])
3161 gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3162 gcc_cv_as_sparc_gotdata_op,,
3168 sethi %gdop_hix22(foo), %g1
3169 xor %g1, %gdop_lox10(foo), %g1
3170 ld [[%l7 + %g1]], %g2, %gdop(foo)],
3171 [if test x$gcc_cv_ld != x \
3172 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3173 if $gcc_cv_ld -v | grep GNU >/dev/null 2>&1; then
3174 if test x$gcc_cv_objdump != x; then
3175 if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3176 | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3177 gcc_cv_as_sparc_gotdata_op=no
3179 gcc_cv_as_sparc_gotdata_op=yes
3183 gcc_cv_as_sparc_gotdata_op=yes
3187 [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3188 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3190 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3191 gcc_cv_as_sparc_ua_pcrel,,
3199 .uaword %r_disp32(foo)],
3200 [if test x$gcc_cv_ld != x \
3201 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3202 gcc_cv_as_sparc_ua_pcrel=yes
3205 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3206 [Define if your assembler and linker support unaligned PC relative relocs.])
3208 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3209 gcc_cv_as_sparc_ua_pcrel_hidden,,
3214 .uaword %r_disp32(foo)
3215 .byte 0x32, 0x33, 0x34
3220 [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3221 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3222 && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3223 | grep ' 31000000 07323334' > /dev/null 2>&1; then
3224 if $gcc_cv_objdump -R conftest 2> /dev/null \
3225 | grep 'DISP32' > /dev/null 2>&1; then
3228 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3232 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3233 [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3234 ]) # unaligned pcrel relocs
3236 gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3237 gcc_cv_as_sparc_offsetable_lo10,,
3240 or %g1, %lo(ab) + 12, %g1
3241 or %g1, %lo(ab + 12), %g1],
3242 [if test x$gcc_cv_objdump != x \
3243 && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3244 | grep ' 82106000 82106000' > /dev/null 2>&1; then
3245 gcc_cv_as_sparc_offsetable_lo10=yes
3247 [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3248 [Define if your assembler supports offsetable %lo().])])
3252 i[34567]86-*-* | x86_64-*-*)
3256 # Full C++ conformance when using a shared libstdc++-v3 requires some
3257 # support from the Cygwin DLL, which in more recent versions exports
3258 # wrappers to aid in interposing and redirecting operators new, delete,
3259 # etc., as per n2800 #17.6.4.6 [replacement.functions]. Check if we
3260 # are configuring for a version of Cygwin that exports the wrappers.
3261 if test x$host = x$target; then
3262 AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3264 # Can't check presence of libc functions during cross-compile, so
3265 # we just have to assume we're building for an up-to-date target.
3266 gcc_ac_cygwin_dll_wrappers=yes
3268 AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3269 [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3270 [Define if you want to generate code by default that assumes that the
3271 Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3274 cygwin* | pe | mingw32*)
3275 # Recent binutils allows the three-operand form of ".comm" on PE. This
3276 # definition is used unconditionally to initialise the default state of
3277 # the target option variable that governs usage of the feature.
3278 gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3279 [2,19,52],,[.comm foo,1,32])
3280 AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3281 [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3282 [Define if your assembler supports specifying the alignment
3283 of objects allocated using the GAS .comm command.])
3284 # Used for DWARF 2 in PE
3285 gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3286 gcc_cv_as_ix86_pe_secrel32,
3292 [if test x$gcc_cv_ld != x \
3293 && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3294 gcc_cv_as_ix86_pe_secrel32=yes
3297 [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3298 [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3299 # Test if the assembler supports the extended form of the .section
3300 # directive that specifies section alignment. LTO support uses this,
3301 # but normally only after installation, so we warn but don't fail the
3302 # configure if LTO is enabled but the assembler does not support it.
3303 gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
3304 [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
3305 if test x$gcc_cv_as_section_has_align != xyes; then
3306 case ",$enable_languages," in
3308 AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
3315 gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3316 gcc_cv_as_ix86_filds,,,
3317 [filds mem; fists mem],,
3318 [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3319 [Define if your assembler uses filds and fists mnemonics.])])
3321 gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3322 gcc_cv_as_ix86_fildq,,,
3323 [fildq mem; fistpq mem],,
3324 [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3325 [Define if your assembler uses fildq and fistq mnemonics.])])
3327 gcc_GAS_CHECK_FEATURE([cmov syntax],
3328 gcc_cv_as_ix86_cmov_sun_syntax,,,
3329 [cmovl.l %edx, %eax],,
3330 [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3331 [Define if your assembler supports the Sun syntax for cmov.])])
3333 gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3334 gcc_cv_as_ix86_ffreep,,,
3336 [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3337 [Define if your assembler supports the ffreep mnemonic.])])
3339 gcc_GAS_CHECK_FEATURE([.quad directive],
3340 gcc_cv_as_ix86_quad,,,
3342 [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
3343 [Define if your assembler supports the .quad directive.])])
3345 gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3346 gcc_cv_as_ix86_sahf,,,
3349 [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3350 [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
3352 gcc_GAS_CHECK_FEATURE([swap suffix],
3353 gcc_cv_as_ix86_swap,,,
3354 [movl.s %esp, %ebp],,
3355 [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3356 [Define if your assembler supports the swap suffix.])])
3358 gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3359 gcc_cv_as_ix86_diff_sect_delta,,,
3367 [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3368 [Define if your assembler supports the subtraction of symbols in different sections.])])
3370 # These two are used unconditionally by i386.[ch]; it is to be defined
3371 # to 1 if the feature is present, 0 otherwise.
3372 gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3373 gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
3379 AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3380 [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3381 [Define true if the assembler supports '.long foo@GOTOFF'.])
3383 gcc_GAS_CHECK_FEATURE([rep and lock prefix],
3384 gcc_cv_as_ix86_rep_lock_prefix,,,
3386 lock addl %edi, (%eax,%esi)
3387 lock orl $0, (%esp)],,
3388 [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
3389 [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
3394 gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3395 gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3397 addl r15 = @ltoffx(x#), gp
3399 ld8.mov r16 = [[r15]], x#],,
3400 [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3401 [Define if your assembler supports ltoffx and ldxmov relocations.])])
3407 *-*-aix*) conftest_s=' .machine "pwr5"
3411 gcc_GAS_CHECK_FEATURE([.machine directive support],
3412 gcc_cv_as_machine_directive,,,
3413 [ .machine ppc7400])
3414 if test x$gcc_cv_as_machine_directive != xyes; then
3415 echo "*** This target requires an assembler supporting \".machine\"" >&2
3416 echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
3417 test x$build = x$target && exit 1
3421 *) conftest_s=' .machine power4
3426 gcc_GAS_CHECK_FEATURE([mfcr field support],
3427 gcc_cv_as_powerpc_mfcrf, [2,14,0],,
3429 [AC_DEFINE(HAVE_AS_MFCRF, 1,
3430 [Define if your assembler supports mfcr field.])])
3433 *-*-aix*) conftest_s=' .machine "pwr5"
3436 *) conftest_s=' .machine power5
3441 gcc_GAS_CHECK_FEATURE([popcntb support],
3442 gcc_cv_as_powerpc_popcntb, [2,17,0],,
3444 [AC_DEFINE(HAVE_AS_POPCNTB, 1,
3445 [Define if your assembler supports popcntb field.])])
3448 *-*-aix*) conftest_s=' .machine "pwr5x"
3451 *) conftest_s=' .machine power5
3456 gcc_GAS_CHECK_FEATURE([fp round support],
3457 gcc_cv_as_powerpc_fprnd, [2,17,0],,
3459 [AC_DEFINE(HAVE_AS_FPRND, 1,
3460 [Define if your assembler supports fprnd.])])
3463 *-*-aix*) conftest_s=' .machine "pwr6"
3466 *) conftest_s=' .machine power6
3471 gcc_GAS_CHECK_FEATURE([move fp gpr support],
3472 gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
3474 [AC_DEFINE(HAVE_AS_MFPGPR, 1,
3475 [Define if your assembler supports mffgpr and mftgpr.])])
3478 *-*-aix*) conftest_s=' .csect .text[[PR]]
3480 addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
3484 addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
3485 *) conftest_s=' .text
3487 addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
3490 gcc_GAS_CHECK_FEATURE([rel16 relocs],
3491 gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
3493 [AC_DEFINE(HAVE_AS_REL16, 1,
3494 [Define if your assembler supports R_PPC_REL16 relocs.])])
3497 *-*-aix*) conftest_s=' .machine "pwr6"
3500 *) conftest_s=' .machine power6
3505 gcc_GAS_CHECK_FEATURE([compare bytes support],
3506 gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
3508 [AC_DEFINE(HAVE_AS_CMPB, 1,
3509 [Define if your assembler supports cmpb.])])
3512 *-*-aix*) conftest_s=' .machine "pwr6"
3515 *) conftest_s=' .machine power6
3520 gcc_GAS_CHECK_FEATURE([decimal float support],
3521 gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
3523 [AC_DEFINE(HAVE_AS_DFP, 1,
3524 [Define if your assembler supports DFP instructions.])])
3527 *-*-aix*) conftest_s=' .machine "pwr7"
3530 *) conftest_s=' .machine power7
3535 gcc_GAS_CHECK_FEATURE([vector-scalar support],
3536 gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
3538 [AC_DEFINE(HAVE_AS_VSX, 1,
3539 [Define if your assembler supports VSX instructions.])])
3542 *-*-aix*) conftest_s=' .machine "pwr7"
3545 *) conftest_s=' .machine power7
3550 gcc_GAS_CHECK_FEATURE([popcntd support],
3551 gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
3553 [AC_DEFINE(HAVE_AS_POPCNTD, 1,
3554 [Define if your assembler supports POPCNTD instructions.])])
3557 *-*-aix*) conftest_s=' .csect .text[[PR]]
3559 *) conftest_s=' .text
3563 gcc_GAS_CHECK_FEATURE([lwsync support],
3564 gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
3566 [AC_DEFINE(HAVE_AS_LWSYNC, 1,
3567 [Define if your assembler supports LWSYNC instructions.])])
3570 *-*-aix*) conftest_s=' .machine "476"
3573 *) conftest_s=' .machine "476"
3578 gcc_GAS_CHECK_FEATURE([data cache invalidate support],
3579 gcc_cv_as_powerpc_dci, [9,99,0], -a32,
3581 [AC_DEFINE(HAVE_AS_DCI, 1,
3582 [Define if your assembler supports the DCI/ICI instructions.])])
3584 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3585 gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
3586 [.gnu_attribute 4,1],,
3587 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3588 [Define if your assembler supports .gnu_attribute.])])
3590 gcc_GAS_CHECK_FEATURE([tls marker support],
3591 gcc_cv_as_powerpc_tls_markers, [2,20,0],,
3592 [ bl __tls_get_addr(x@tlsgd)],,
3593 [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
3594 [Define if your assembler supports arg info for __tls_get_addr.])])
3598 gcc_GAS_CHECK_FEATURE([.ref support],
3599 gcc_cv_as_aix_ref, [2.21.0],,
3600 [ .csect stuff[[rw]]
3606 [AC_DEFINE(HAVE_AS_REF, 1,
3607 [Define if your assembler supports .ref])])
3613 gcc_GAS_CHECK_FEATURE([explicit relocation support],
3614 gcc_cv_as_mips_explicit_relocs, [2,14,0],,
3615 [ lw $4,%gp_rel(foo)($4)],,
3616 [if test x$target_cpu_default = x
3617 then target_cpu_default=MASK_EXPLICIT_RELOCS
3618 else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
3620 gcc_GAS_CHECK_FEATURE([-mno-shared support],
3621 gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
3622 [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
3623 [Define if the assembler understands -mno-shared.])])
3625 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3626 gcc_cv_as_mips_gnu_attribute, [2,18,0],,
3627 [.gnu_attribute 4,1],,
3628 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3629 [Define if your assembler supports .gnu_attribute.])])
3631 gcc_GAS_CHECK_FEATURE([.dtprelword support],
3632 gcc_cv_as_mips_dtprelword, [2,18,0],,
3633 [.section .tdata,"awT",@progbits
3637 .dtprelword x+0x8000],,
3638 [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
3639 [Define if your assembler supports .dtprelword.])])
3641 AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
3642 gcc_cv_as_ld_jalr_reloc=no
3643 if test $gcc_cv_as_mips_explicit_relocs = yes; then
3644 if test $in_tree_ld = yes ; then
3645 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
3646 && test $in_tree_ld_is_elf = yes; then
3647 gcc_cv_as_ld_jalr_reloc=yes
3649 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
3650 echo ' .ent x' > conftest.s
3651 echo 'x: ld $2,%got_disp(y)($3)' >> conftest.s
3652 echo ' ld $25,%call16(y)($28)' >> conftest.s
3653 echo ' .reloc 1f,R_MIPS_JALR,y' >> conftest.s
3654 echo '1: jalr $25' >> conftest.s
3655 echo ' .reloc 1f,R_MIPS_JALR,x' >> conftest.s
3656 echo '1: jalr $25' >> conftest.s
3657 echo ' .end x' >> conftest.s
3658 if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
3659 && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
3660 if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
3661 && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
3662 gcc_cv_as_ld_jalr_reloc=yes
3668 if test $gcc_cv_as_ld_jalr_reloc = yes; then
3669 if test x$target_cpu_default = x; then
3670 target_cpu_default=MASK_RELAX_PIC_CALLS
3672 target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
3675 AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
3677 AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
3678 [gcc_cv_ld_mips_personality_relaxation],
3679 [gcc_cv_ld_mips_personality_relaxation=no
3680 if test $in_tree_ld = yes ; then
3681 if test "$gcc_cv_gld_major_version" -eq 2 \
3682 -a "$gcc_cv_gld_minor_version" -ge 21 \
3683 -o "$gcc_cv_gld_major_version" -gt 2; then
3684 gcc_cv_ld_mips_personality_relaxation=yes
3686 elif test x$gcc_cv_as != x \
3687 -a x$gcc_cv_ld != x \
3688 -a x$gcc_cv_readelf != x ; then
3689 cat > conftest.s <<EOF
3691 .cfi_personality 0x80,indirect_ptr
3698 .section .data,"aw",@progbits
3702 if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
3703 && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
3704 if $gcc_cv_readelf -d conftest 2>&1 \
3705 | grep TEXTREL > /dev/null 2>&1; then
3707 elif $gcc_cv_readelf --relocs conftest 2>&1 \
3708 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
3711 gcc_cv_ld_mips_personality_relaxation=yes
3715 rm -f conftest.s conftest.o conftest])
3716 if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
3717 AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
3718 [Define if your linker can relax absolute .eh_frame personality
3719 pointers into PC-relative form.])
3724 # Mips and HP-UX need the GNU assembler.
3725 # Linux on IA64 might be able to use the Intel assembler.
3728 mips*-*-* | *-*-hpux* )
3729 if test x$gas_flag = xyes \
3730 || test x"$host" != x"$build" \
3731 || test ! -x "$gcc_cv_as" \
3732 || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
3735 echo "*** This configuration requires the GNU assembler" >&2
3741 # ??? Not all targets support dwarf2 debug_line, even within a version
3742 # of gas. Moreover, we need to emit a valid instruction to trigger any
3743 # info to the output file. So, as supported targets are added to gas 2.11,
3744 # add some instruction here to (also) show we expect this might work.
3745 # ??? Once 2.11 is released, probably need to add first known working
3746 # version to the per-target configury.
3748 i?86*-*-* | mips*-*-* | alpha*-*-* | powerpc*-*-* | sparc*-*-* | m68*-*-* \
3749 | x86_64*-*-* | hppa*-*-* | arm*-*-* \
3750 | xstormy16*-*-* | cris-*-* | crisv32-*-* | xtensa*-*-* | bfin-*-* | score*-*-* \
3751 | spu-*-* | fido*-*-* | m32c-*-*)
3754 ia64*-*-* | s390*-*-*)
3761 if test x"$insn" != x; then
3763 .file 1 \"conftest.s\"
3766 gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
3767 gcc_cv_as_dwarf2_debug_line,
3768 [elf,2,11,0],, [$conftest_s],
3769 [if test x$gcc_cv_objdump != x \
3770 && $gcc_cv_objdump -h conftest.o 2> /dev/null \
3771 | grep debug_line > /dev/null 2>&1; then
3772 gcc_cv_as_dwarf2_debug_line=yes
3775 # The .debug_line file table must be in the exact order that
3776 # we specified the files, since these indices are also used
3777 # by DW_AT_decl_file. Approximate this test by testing if
3778 # the assembler bitches if the same index is assigned twice.
3779 gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
3780 gcc_cv_as_dwarf2_file_buggy,,,
3784 if test $gcc_cv_as_dwarf2_debug_line = yes \
3785 && test $gcc_cv_as_dwarf2_file_buggy = no; then
3786 AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
3787 [Define if your assembler supports dwarf2 .file/.loc directives,
3788 and preserves file table indices exactly as given.])
3791 gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
3792 gcc_cv_as_gdwarf2_flag,
3793 [elf,2,11,0], [--gdwarf2], [$insn],,
3794 [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
3795 [Define if your assembler supports the --gdwarf2 option.])])
3797 gcc_GAS_CHECK_FEATURE([--gstabs option],
3798 gcc_cv_as_gstabs_flag,
3799 [elf,2,11,0], [--gstabs], [$insn],
3800 [# The native Solaris 9/Intel assembler doesn't understand --gstabs
3801 # and warns about it, but still exits successfully. So check for
3803 if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
3805 else gcc_cv_as_gstabs_flag=yes
3807 [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
3808 [Define if your assembler supports the --gstabs option.])])
3810 gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
3811 gcc_cv_as_debug_prefix_map_flag,
3812 [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
3813 [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
3814 [Define if your assembler supports the --debug-prefix-map option.])])
3817 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
3820 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
3821 [Define if your assembler supports .lcomm with an alignment field.])])
3823 AC_ARG_ENABLE(gnu-unique-object,
3824 [ --enable-gnu-unique-object enable the use of the @gnu_unique_object ELF extension on
3826 [case $enable_gnu_unique_object in
3828 *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
3829 Valid choices are 'yes' and 'no'.]) ;;
3831 [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
3833 [.type foo, @gnu_unique_object],,
3834 # Also check for ld.so support, i.e. glibc 2.11 or higher.
3835 [[if test x$host = x$build -a x$host = x$target &&
3836 glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
3837 glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
3838 glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
3839 glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
3840 if test "$glibcnum" -ge 2011 ; then
3841 enable_gnu_unique_object=yes
3844 if test x$enable_gnu_unique_object = xyes; then
3845 AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
3846 [Define if your assembler supports @gnu_unique_object.])
3849 AC_CACHE_CHECK([assembler for tolerance to line number 0],
3850 [gcc_cv_as_line_zero],
3851 [gcc_cv_as_line_zero=no
3852 if test $in_tree_gas = yes; then
3853 gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
3854 elif test "x$gcc_cv_as" != x; then
3855 { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
3856 if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
3857 test "x`cat conftest.out`" = x
3859 gcc_cv_as_line_zero=yes
3861 echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
3862 cat conftest.s >&AS_MESSAGE_LOG_FD
3863 echo "configure: error output was" >&AS_MESSAGE_LOG_FD
3864 cat conftest.out >&AS_MESSAGE_LOG_FD
3866 rm -f conftest.o conftest.s conftest.out
3868 if test "x$gcc_cv_as_line_zero" = xyes; then
3869 AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
3870 [Define if the assembler won't complain about a line such as # 0 "" 2.])
3873 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
3874 gcc_cv_ld_eh_frame_hdr=no
3875 if test $in_tree_ld = yes ; then
3876 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
3877 && test $in_tree_ld_is_elf = yes; then
3878 gcc_cv_ld_eh_frame_hdr=yes
3880 elif test x$gcc_cv_ld != x; then
3881 # Check if linker supports --eh-frame-hdr option
3882 if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
3883 gcc_cv_ld_eh_frame_hdr=yes
3886 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
3887 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
3888 AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
3889 [Define if your linker supports --eh-frame-hdr option.])
3891 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
3893 AC_MSG_CHECKING(linker position independent executable support)
3895 if test $in_tree_ld = yes ; then
3896 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
3897 && test $in_tree_ld_is_elf = yes; then
3900 elif test x$gcc_cv_ld != x; then
3901 # Check if linker supports -pie option
3902 if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
3906 if test x"$gcc_cv_ld_pie" = xyes; then
3907 AC_DEFINE(HAVE_LD_PIE, 1,
3908 [Define if your linker supports -pie option.])
3910 AC_MSG_RESULT($gcc_cv_ld_pie)
3912 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
3913 gcc_cv_ld_eh_gc_sections=no
3914 if test $in_tree_ld = yes ; then
3915 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
3916 && test $in_tree_ld_is_elf = yes; then
3917 gcc_cv_ld_eh_gc_sections=yes
3919 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3920 cat > conftest.s <<EOF
3923 .type _start, @function
3926 .size _start, .-_start
3927 .section .text.foo,"ax",@progbits
3928 .type foo, @function
3932 .section .gcc_except_table.foo,"a",@progbits
3935 .section .eh_frame,"a",@progbits
3938 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3939 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3940 | grep "gc-sections option ignored" > /dev/null; then
3941 gcc_cv_ld_eh_gc_sections=no
3942 elif $gcc_cv_objdump -h conftest 2> /dev/null \
3943 | grep gcc_except_table > /dev/null; then
3944 gcc_cv_ld_eh_gc_sections=yes
3945 # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
3946 if test x$gcc_cv_as_comdat_group != xyes; then
3947 gcc_cv_ld_eh_gc_sections=no
3948 cat > conftest.s <<EOF
3951 .type _start, @function
3954 .size _start, .-_start
3955 .section .gnu.linkonce.t.foo,"ax",@progbits
3956 .type foo, @function
3960 .section .gcc_except_table.foo,"a",@progbits
3963 .section .eh_frame,"a",@progbits
3966 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3967 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3968 | grep "gc-sections option ignored" > /dev/null; then
3969 gcc_cv_ld_eh_gc_sections=no
3970 elif $gcc_cv_objdump -h conftest 2> /dev/null \
3971 | grep gcc_except_table > /dev/null; then
3972 gcc_cv_ld_eh_gc_sections=yes
3978 rm -f conftest.s conftest.o conftest
3982 # ??? This apparently exposes a binutils bug with PC-relative relocations.
3983 gcc_cv_ld_eh_gc_sections=no
3986 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
3987 AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
3988 [Define if your linker supports garbage collection of
3989 sections in presence of EH frames.])
3991 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
3997 AC_CACHE_CHECK(linker --as-needed support,
3998 gcc_cv_ld_as_needed,
3999 [gcc_cv_ld_as_needed=no
4000 if test $in_tree_ld = yes ; then
4001 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4002 && test $in_tree_ld_is_elf = yes; then
4003 gcc_cv_ld_as_needed=yes
4005 elif test x$gcc_cv_ld != x; then
4006 # Check if linker supports --as-needed and --no-as-needed options
4007 if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
4008 gcc_cv_ld_as_needed=yes
4012 if test x"$gcc_cv_ld_as_needed" = xyes; then
4013 AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
4014 [Define if your linker supports --as-needed and --no-as-needed options.])
4017 case "$target:$tm_file" in
4018 powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
4019 AC_CACHE_CHECK(linker support for omitting dot symbols,
4020 gcc_cv_ld_no_dot_syms,
4021 [gcc_cv_ld_no_dot_syms=no
4022 if test $in_tree_ld = yes ; then
4023 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
4024 gcc_cv_ld_no_dot_syms=yes
4026 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4027 cat > conftest1.s <<EOF
4031 cat > conftest2.s <<EOF
4032 .section ".opd","aw"
4037 .quad .LEfoo,.TOC.@tocbase,0
4043 if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
4044 && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
4045 && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
4046 gcc_cv_ld_no_dot_syms=yes
4048 rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
4051 if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
4052 AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
4053 [Define if your PowerPC64 linker only needs function descriptor syms.])
4056 AC_CACHE_CHECK(linker large toc support,
4057 gcc_cv_ld_large_toc,
4058 [gcc_cv_ld_large_toc=no
4059 if test $in_tree_ld = yes ; then
4060 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
4061 gcc_cv_ld_large_toc=yes
4063 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4064 cat > conftest.s <<EOF
4065 .section ".tbss","awT",@nobits
4071 addis 9,13,ie0@got@tprel@ha
4072 ld 9,ie0@got@tprel@l(9)
4074 if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
4075 && $gcc_cv_ld -melf64ppc --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
4076 gcc_cv_ld_large_toc=yes
4078 rm -f conftest conftest.o conftest.s
4081 if test x"$gcc_cv_ld_large_toc" = xyes; then
4082 AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4083 [Define if your PowerPC64 linker supports a large TOC.])
4088 AC_CACHE_CHECK(linker --build-id support,
4090 [gcc_cv_ld_buildid=no
4091 if test $in_tree_ld = yes ; then
4092 if test "$gcc_cv_gld_major_version" -eq 2 -a \
4093 "$gcc_cv_gld_minor_version" -ge 18 -o \
4094 "$gcc_cv_gld_major_version" -gt 2 \
4095 && test $in_tree_ld_is_elf = yes; then
4096 gcc_cv_ld_buildid=yes
4098 elif test x$gcc_cv_ld != x; then
4099 if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
4100 gcc_cv_ld_buildid=yes
4103 if test x"$gcc_cv_ld_buildid" = xyes; then
4104 AC_DEFINE(HAVE_LD_BUILDID, 1,
4105 [Define if your linker supports --build-id.])
4108 AC_ARG_ENABLE(linker-build-id,
4109 [ --enable-linker-build-id
4110 compiler will always pass --build-id to linker],
4112 enable_linker_build_id=no)
4114 if test x"$enable_linker_build_id" = xyes; then
4115 if test x"$gcc_cv_ld_buildid" = xyes; then
4116 AC_DEFINE(ENABLE_LD_BUILDID, 1,
4117 [Define if gcc should always pass --build-id to linker.])
4119 AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
4123 # In binutils 2.21, GNU ld gained support for new emulations fully
4124 # supporting the Solaris 2 ABI. Detect their presence in the linker used.
4125 AC_CACHE_CHECK(linker *_sol2 emulation support,
4126 gcc_cv_ld_sol2_emulation,
4127 [gcc_cv_ld_sol2_emulation=no
4128 if test $in_tree_ld = yes ; then
4129 if test "$gcc_cv_gld_major_version" -eq 2 -a \
4130 "$gcc_cv_gld_minor_version" -ge 21 -o \
4131 "$gcc_cv_gld_major_version" -gt 2 \
4132 && test $in_tree_ld_is_elf = yes; then
4133 gcc_cv_ld_sol2_emulation=yes
4135 elif test x$gcc_cv_ld != x; then
4136 if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
4137 grep _sol2 > /dev/null; then
4138 gcc_cv_ld_sol2_emulation=yes
4141 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
4142 AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
4143 [Define if your linker supports the *_sol2 emulations.])
4146 AC_CACHE_CHECK(linker --sysroot support,
4148 [gcc_cv_ld_sysroot=no
4149 if test $in_tree_ld = yes ; then
4150 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
4151 gcc_cv_ld_sysroot=yes
4153 elif test x$gcc_cv_ld != x; then
4154 if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
4155 gcc_cv_ld_sysroot=yes
4158 if test x"$gcc_cv_ld_sysroot" = xyes; then
4159 AC_DEFINE(HAVE_LD_SYSROOT, 1,
4160 [Define if your linker supports --sysroot.])
4163 if test x$with_sysroot = x && test x$host = x$target \
4164 && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4165 && test "$prefix" != "NONE"; then
4166 AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4167 [Define to PREFIX/include if cpp should also search that directory.])
4170 # Test for stack protector support in target C library.
4171 AC_CACHE_CHECK(__stack_chk_fail in target C library,
4172 gcc_cv_libc_provides_ssp,
4173 [gcc_cv_libc_provides_ssp=no
4175 *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
4176 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4177 if test "x$with_headers" != x; then
4178 glibc_header_dir=$with_headers
4179 elif test "x$with_sysroot" = x; then
4180 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4181 elif test "x$with_build_sysroot" != "x"; then
4182 glibc_header_dir="${with_build_sysroot}/usr/include"
4183 elif test "x$with_sysroot" = xyes; then
4184 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4186 glibc_header_dir="${with_sysroot}/usr/include"
4189 glibc_header_dir=/usr/include
4191 [# glibc 2.4 and later provides __stack_chk_fail and
4192 # either __stack_chk_guard, or TLS access to stack guard canary.
4193 if test -f $glibc_header_dir/features.h \
4194 && $EGREP '^[ ]*#[ ]*define[ ]+__GNU_LIBRARY__[ ]+([1-9][0-9]|[6-9])' \
4195 $glibc_header_dir/features.h > /dev/null; then
4196 if $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+([1-9][0-9]|[3-9])' \
4197 $glibc_header_dir/features.h > /dev/null; then
4198 gcc_cv_libc_provides_ssp=yes
4199 elif $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+2' \
4200 $glibc_header_dir/features.h > /dev/null \
4201 && $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC_MINOR__[ ]+([1-9][0-9]|[4-9])' \
4202 $glibc_header_dir/features.h > /dev/null; then
4203 gcc_cv_libc_provides_ssp=yes
4204 elif $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC__[ ]+1' \
4205 $glibc_header_dir/features.h > /dev/null && \
4206 test -f $glibc_header_dir/bits/uClibc_config.h && \
4207 $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC_HAS_SSP__[ ]+1' \
4208 $glibc_header_dir/bits/uClibc_config.h > /dev/null; then
4209 gcc_cv_libc_provides_ssp=yes
4214 # Avoid complicated tests (see
4215 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
4216 # simply assert that glibc does provide this, which is true for all
4217 # realistically usable GNU/Hurd configurations.
4218 gcc_cv_libc_provides_ssp=yes;;
4219 *-*-darwin* | *-*-freebsd*)
4220 AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
4221 [echo "no __stack_chk_fail on this target"])
4223 *) gcc_cv_libc_provides_ssp=no ;;
4226 if test x$gcc_cv_libc_provides_ssp = xyes; then
4227 AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
4228 [Define if your target C library provides stack protector support])
4231 # Check if TFmode long double should be used by default or not.
4232 # Some glibc targets used DFmode long double, but with glibc 2.4
4233 # and later they can use TFmode.
4235 powerpc*-*-linux* | \
4240 AC_ARG_WITH(long-double-128,
4241 [ --with-long-double-128 Use 128-bit long double by default.],
4242 gcc_cv_target_ldbl128="$with_long_double_128",
4243 [[gcc_cv_target_ldbl128=no
4244 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4245 if test "x$with_sysroot" = x; then
4246 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4247 elif test "x$with_build_sysroot" != "x"; then
4248 glibc_header_dir="${with_build_sysroot}/usr/include"
4249 elif test "x$with_sysroot" = xyes; then
4250 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4252 glibc_header_dir="${with_sysroot}/usr/include"
4255 glibc_header_dir=/usr/include
4257 grep '^[ ]*#[ ]*define[ ][ ]*__LONG_DOUBLE_MATH_OPTIONAL' \
4258 $glibc_header_dir/bits/wordsize.h > /dev/null 2>&1 \
4259 && gcc_cv_target_ldbl128=yes
4263 if test x$gcc_cv_target_ldbl128 = xyes; then
4264 AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
4265 [Define if TFmode long double should be the default])
4268 # Find out what GC implementation we want, or may, use.
4270 [ --with-gc={page,zone} choose the garbage collection mechanism to use
4278 AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
4281 AC_MSG_ERROR([$withval is an invalid option to --with-gc])
4286 echo "Using $GGC for garbage collection."
4288 # Libraries to use on the host. This will normally be set by the top
4289 # level Makefile. Here we simply capture the value for our Makefile.
4290 if test -z "${HOST_LIBS+set}"; then
4295 # Use the system's zlib library.
4297 zlibinc="-I\$(srcdir)/../zlib"
4298 AC_ARG_WITH(system-zlib,
4299 [ --with-system-zlib use installed libz],
4306 dnl Very limited version of automake's enable-maintainer-mode
4308 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
4309 dnl maintainer-mode is disabled by default
4310 AC_ARG_ENABLE(maintainer-mode,
4311 [ --enable-maintainer-mode
4312 enable make rules and dependencies not useful
4313 (and sometimes confusing) to the casual installer],
4314 maintainer_mode=$enableval,
4317 AC_MSG_RESULT($maintainer_mode)
4319 if test "$maintainer_mode" = "yes"; then
4330 # Make empty files to contain the specs and options for each language.
4331 # Then add #include lines to for a compiler that has specs and/or options.
4337 # These (without "all_") are set in each config-lang.in.
4338 # `language' must be a single word so is spelled singularly.
4341 all_outputs='Makefile gccbug'
4342 # List of language makefile fragments.
4344 # Additional files for gengtype
4345 all_gtfiles="$target_gtfiles"
4347 # These are the languages that are set in --enable-languages,
4348 # and are available in the GCC tree.
4349 all_selected_languages=
4351 # Add the language fragments.
4352 # Languages are added via two mechanisms. Some information must be
4353 # recorded in makefile variables, these are defined in config-lang.in.
4354 # We accumulate them and plug them into the main Makefile.
4355 # The other mechanism is a set of hooks for each of the main targets
4356 # like `clean', `install', etc.
4358 language_hooks="Make-hooks"
4360 for lang in ${srcdir}/*/config-lang.in
4363 test "$lang" = "${srcdir}/*/config-lang.in" && continue
4365 lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^ ]*\).*$,\1,p' $lang`
4366 if test "x$lang_alias" = x
4368 echo "$lang doesn't set \$language." 1>&2
4371 subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
4372 subdirs="$subdirs $subdir"
4374 # $gcc_subdir is where the gcc integration files are to be found
4375 # for a language, both for internal compiler purposes (compiler
4376 # sources implementing front-end to GCC tree converters), and for
4377 # build infrastructure purposes (Make-lang.in, etc.)
4379 # This will be <subdir> (relative to $srcdir) if a line like
4380 # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
4381 # is found in <langdir>/config-lang.in, and will remain <langdir>
4384 # Except for the language alias (fetched above), the regular
4385 # "config-lang.in" contents are always retrieved from $gcc_subdir,
4386 # so a <langdir>/config-lang.in setting gcc_subdir typically sets
4387 # only this and the language alias.
4389 gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^ ]*\).*$,\1,p' $lang`
4390 if [ "$gcc_subdir" = "" ]; then
4391 gcc_subdir="$subdir"
4394 case ",$enable_languages," in
4396 all_selected_languages="$all_selected_languages $lang_alias"
4397 if test -f $srcdir/$gcc_subdir/lang-specs.h; then
4398 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
4410 . ${srcdir}/$gcc_subdir/config-lang.in
4411 if test "x$language" = x
4413 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
4418 case ",$enable_languages," in
4421 for i in $subdir_requires; do
4422 test -f "${srcdir}/$i/config-lang.in" && continue
4430 all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
4431 if test -f $srcdir/$gcc_subdir/lang.opt; then
4432 lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
4434 if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
4435 lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
4437 all_languages="$all_languages $language"
4438 all_compilers="$all_compilers $compilers"
4439 all_outputs="$all_outputs $outputs"
4440 all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
4441 case ",$enable_languages," in
4443 AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
4445 AC_SUBST(enable_lto)
4446 # LTO needs to speak the platform's object file format, and has a
4447 # number of implementations of the required binary file access APIs.
4448 # ELF is the most common, and default. We only link libelf if ELF
4449 # is indeed the selected format.
4450 LTO_BINARY_READER=${lto_binary_reader}
4451 LTO_USE_LIBELF=-lelf
4452 if test "x$lto_binary_reader" != "xlto-elf" ; then
4455 AC_SUBST(LTO_BINARY_READER)
4456 AC_SUBST(LTO_USE_LIBELF)
4462 # Pick up gtfiles for c
4464 . ${srcdir}/c-config-lang.in
4465 all_gtfiles="$all_gtfiles [[c]] $gtfiles"
4468 for language in $all_selected_languages
4470 check_languages="$check_languages check-$language"
4473 # We link each language in with a set of hooks, reached indirectly via
4474 # lang.${target}. Only do so for selected languages.
4478 target_list="all.cross start.encap rest.encap tags \
4479 install-common install-man install-info install-pdf install-html dvi \
4480 pdf html uninstall info man srcextra srcman srcinfo \
4481 mostlyclean clean distclean maintainer-clean install-plugin"
4483 for t in $target_list
4486 for lang in $all_selected_languages
4490 echo "lang.$t: $x" >> Make-hooks
4499 echo "dir ." > .gdbinit
4500 echo "dir ${srcdir}" >> .gdbinit
4501 if test x$gdb_needs_out_file_path = xyes
4503 echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
4505 if test "x$subdirs" != x; then
4508 echo "dir ${srcdir}/$s" >> .gdbinit
4511 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
4513 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
4514 AC_SUBST(gcc_tooldir)
4517 # Find a directory in which to install a shared libgcc.
4519 AC_ARG_ENABLE(version-specific-runtime-libs,
4520 [ --enable-version-specific-runtime-libs
4521 specify that runtime libraries should be
4522 installed in a compiler-specific directory])
4524 AC_ARG_WITH(slibdir,
4525 [ --with-slibdir=DIR shared libraries in DIR [[LIBDIR]]],
4526 slibdir="$with_slibdir",
4527 if test "${enable_version_specific_runtime_libs+set}" = set; then
4528 slibdir='$(libsubdir)'
4529 elif test "$host" != "$target"; then
4530 slibdir='$(build_tooldir)/lib'
4536 # Substitute configuration variables
4539 AC_SUBST(all_compilers)
4540 AC_SUBST(all_gtfiles)
4541 AC_SUBST(all_lang_makefrags)
4542 AC_SUBST(all_languages)
4543 AC_SUBST(all_selected_languages)
4544 AC_SUBST(build_exeext)
4545 AC_SUBST(build_install_headers_dir)
4546 AC_SUBST(build_xm_file_list)
4547 AC_SUBST(build_xm_include_list)
4548 AC_SUBST(build_xm_defines)
4549 AC_SUBST(build_file_translate)
4550 AC_SUBST(check_languages)
4551 AC_SUBST(cpp_install_dir)
4552 AC_SUBST(xmake_file)
4553 AC_SUBST(tmake_file)
4554 AC_SUBST(TM_ENDIAN_CONFIG)
4555 AC_SUBST(TM_MULTILIB_CONFIG)
4556 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
4557 AC_SUBST(extra_gcc_objs)
4558 AC_SUBST(user_headers_inc_next_pre)
4559 AC_SUBST(user_headers_inc_next_post)
4560 AC_SUBST(extra_headers_list)
4561 AC_SUBST(extra_objs)
4562 AC_SUBST(extra_parts)
4563 AC_SUBST(extra_passes)
4564 AC_SUBST(extra_programs)
4565 AC_SUBST(float_h_file)
4566 AC_SUBST(gcc_config_arguments)
4567 AC_SUBST(gcc_gxx_include_dir)
4568 AC_SUBST(host_exeext)
4569 AC_SUBST(host_xm_file_list)
4570 AC_SUBST(host_xm_include_list)
4571 AC_SUBST(host_xm_defines)
4572 AC_SUBST(out_host_hook_obj)
4574 AC_SUBST(lang_opt_files)
4575 AC_SUBST(lang_specs_files)
4576 AC_SUBST(lang_tree_files)
4577 AC_SUBST(local_prefix)
4579 AC_SUBST(objc_boehm_gc)
4581 AC_SUBST(out_object_file)
4582 AC_SUBST(thread_file)
4583 AC_SUBST(tm_file_list)
4584 AC_SUBST(tm_include_list)
4585 AC_SUBST(tm_defines)
4586 AC_SUBST(tm_p_file_list)
4587 AC_SUBST(tm_p_include_list)
4588 AC_SUBST(xm_file_list)
4589 AC_SUBST(xm_include_list)
4590 AC_SUBST(xm_defines)
4591 AC_SUBST(use_gcc_stdint)
4592 AC_SUBST(c_target_objs)
4593 AC_SUBST(cxx_target_objs)
4594 AC_SUBST(fortran_target_objs)
4595 AC_SUBST(target_cpu_default)
4597 AC_SUBST_FILE(language_hooks)
4600 if test x${build} = x${host} ; then
4601 if test x${host} = x${target} ; then
4602 echo "Links are now set up to build a native compiler for ${target}." 1>&2
4604 echo "Links are now set up to build a cross-compiler" 1>&2
4605 echo " from ${host} to ${target}." 1>&2
4608 if test x${host} = x${target} ; then
4609 echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
4610 echo " for ${target}." 1>&2
4612 echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
4613 echo " from ${host} to ${target}." 1>&2
4617 AC_ARG_VAR(GMPLIBS,[How to link GMP])
4618 AC_ARG_VAR(GMPINC,[How to find GMP include files])
4620 AC_ARG_VAR(PPLLIBS,[How to link PPL])
4621 AC_ARG_VAR(PPLINC,[How to find PPL include files])
4623 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
4624 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
4625 if test "x${CLOOGLIBS}" != "x" ; then
4626 AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
4629 AC_ARG_VAR(LIBELFLIBS,[How to link libelf])
4630 AC_ARG_VAR(LIBELFINC,[How to find libelf include files])
4631 if test "x${LIBELFLIBS}" != "x" ; then
4632 AC_DEFINE(HAVE_libelf, 1, [Define if libelf is in use.])
4635 # Check for plugin support
4636 AC_ARG_ENABLE(plugin,
4637 [ --enable-plugin enable plugin support],
4638 enable_plugin=$enableval,
4639 enable_plugin=yes; default_plugin=yes)
4645 if test x$build = x$host; then
4646 export_sym_check="nm${exeext} -g"
4647 elif x$host = x$target; then
4648 export_sym_check="$gcc_cv_nm -g"
4654 if test x$build = x$host; then
4655 export_sym_check="objdump${exeext} -T"
4656 elif x$host = x$target; then
4657 export_sym_check="$gcc_cv_objdump -T"
4664 if test x"$enable_plugin" = x"yes"; then
4666 AC_MSG_CHECKING([for exported symbols])
4667 if test "x$export_sym_check" != x; then
4668 echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
4669 ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
4670 if $export_sym_check conftest | grep foobar > /dev/null; then
4671 : # No need to use a flag
4672 AC_MSG_RESULT([yes])
4674 AC_MSG_RESULT([yes])
4675 AC_MSG_CHECKING([for -rdynamic])
4676 ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
4677 if $export_sym_check conftest | grep foobar > /dev/null; then
4679 pluginlibs="-rdynamic"
4684 AC_MSG_RESULT([$plugin_rdynamic])
4687 AC_MSG_RESULT([unable to check])
4692 AC_SEARCH_LIBS([dlopen], [dl])
4693 if test x"$ac_cv_search_dlopen" = x"-ldl"; then
4694 pluginlibs="$pluginlibs -ldl"
4698 # Check that we can build shared objects with -fPIC -shared
4699 saved_LDFLAGS="$LDFLAGS"
4702 LDFLAGS="$LDFLAGS -fPIC -shared -undefined dynamic_lookup"
4705 LDFLAGS="$LDFLAGS -fPIC -shared"
4708 AC_MSG_CHECKING([for -fPIC -shared])
4710 [extern int X;],[return X == 0;],
4711 [AC_MSG_RESULT([yes]); have_pic_shared=yes],
4712 [AC_MSG_RESULT([no]); have_pic_shared=no])
4713 if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
4717 LDFLAGS="$saved_LDFLAGS"
4719 # If plugin support had been requested but not available, fail.
4720 if test x"$enable_plugin" = x"no" ; then
4721 if test x"$default_plugin" != x"yes"; then
4723 Building GCC with plugin support requires a host that supports
4724 -fPIC, -shared, -ldl and -rdynamic.])
4729 AC_SUBST(pluginlibs)
4730 AC_SUBST(enable_plugin)
4731 if test x"$enable_plugin" = x"yes"; then
4732 AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
4735 # Configure the subdirectories
4736 # AC_CONFIG_SUBDIRS($subdirs)
4738 # Create the Makefile
4739 # and configure language subdirectories
4740 AC_CONFIG_FILES($all_outputs)
4742 AC_CONFIG_COMMANDS([default],
4744 case ${CONFIG_HEADERS} in
4745 *auto-host.h:config.in*)
4748 # Make sure all the subdirs exist.
4749 for d in $subdirs doc build c-family
4751 test -d $d || mkdir $d
4754 [subdirs='$subdirs'])