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=$withval],
755 AC_SUBST(CONFIGURE_SPECS)
757 ACX_PKGVERSION([GCC])
758 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
760 # Sanity check enable_languages in case someone does not run the toplevel
761 # configure # script.
762 AC_ARG_ENABLE(languages,
763 [ --enable-languages=LIST specify which front-ends to build],
764 [case ,${enable_languages}, in
766 # go safe -- we cannot be much sure without the toplevel
768 # analysis of which target libs are present and usable
772 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
777 enable_languages=c,${enable_languages}
780 [enable_languages=c])
782 AC_ARG_WITH(multilib-list,
783 [ --with-multilib-list Select multilibs (SH only)],
785 with_multilib_list=default)
787 # -------------------------
788 # Checks for other programs
789 # -------------------------
793 # Find some useful tools
795 # We need awk to create options.c and options.h.
796 # Bail out if it's missing.
798 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
806 # By default, the Darwin ranlib will not treat common symbols as
807 # definitions when building the archive table of contents. Other
808 # ranlibs do that; pass an option to the Darwin ranlib that makes
809 # it behave similarly.
815 AC_SUBST(ranlib_flags)
819 # See if cmp has --ignore-initial.
820 gcc_AC_PROG_CMP_IGNORE_INITIAL
822 # See if we have the mktemp command.
823 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
825 # See if makeinfo has been installed and is modern enough
826 # that we can use it.
827 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
828 [GNU texinfo.* \([0-9][0-9.]*\)],
829 [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
830 if test $gcc_cv_prog_makeinfo_modern = no; then
832 *** Makeinfo is missing or too old.
833 *** Info documentation will not be built.])
840 # Is pod2man recent enough to regenerate manpages?
841 AC_MSG_CHECKING([for recent Pod::Man])
842 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
844 GENERATED_MANPAGES=generated-manpages
849 AC_SUBST(GENERATED_MANPAGES)
851 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
854 dnl Don't use AC_PROG_LEX; we insist on flex.
855 dnl LEXLIB is not useful in gcc.
856 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
859 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
861 # Binutils are not build modules, unlike bison/flex/makeinfo. So we
862 # check for build == host before using them.
865 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
866 && test -d ../binutils ; then
867 NM='${objdir}/../binutils/nm-new'
869 AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
873 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
874 && test -d ../binutils ; then
875 AR='${objdir}/../binutils/ar'
877 AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
881 # --------------------
882 # Checks for C headers
883 # --------------------
885 # Need to reject headers which give warnings, so that the -Werror bootstrap
886 # works later. *sigh* This needs to come before all header checks.
893 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
894 fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
895 sys/resource.h sys/param.h sys/times.h sys/stat.h \
896 direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
898 # Check for thread headers.
899 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
900 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
902 # These tests can't be done till we know if we have limits.h.
911 # These libraries may be used by collect2.
912 # We may need a special search path to get them linked.
913 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
915 for libs in '' -lld -lmld \
916 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
917 '-L/usr/lib/cmplrs/cc3.11 -lmld'
920 AC_TRY_LINK_FUNC(ldopen,
921 [gcc_cv_collect2_libs="$libs"; break])
924 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
925 case $gcc_cv_collect2_libs in
927 *) COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
929 AC_SUBST(COLLECT2_LIBS)
931 # When building Ada code on Alpha, we need exc_resume which is usually in
932 # -lexc. So test for it.
935 AC_SEARCH_LIBS(exc_resume, exc)
938 AC_SUBST(GNAT_LIBEXC)
940 # Some systems put ldexp and frexp in libm instead of libc; assume
941 # they're both in the same place. jcf-dump needs them.
944 AC_SEARCH_LIBS(ldexp, m)
949 # Use <inttypes.h> only if it exists,
950 # doesn't clash with <sys/types.h>, and declares intmax_t.
951 AC_MSG_CHECKING(for inttypes.h)
952 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
953 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
954 [[#include <sys/types.h>
955 #include <inttypes.h>]],
956 [[intmax_t i = -1;]])],
957 [gcc_cv_header_inttypes_h=yes],
958 [gcc_cv_header_inttypes_h=no])])
959 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
960 if test $gcc_cv_header_inttypes_h = yes; then
961 AC_DEFINE(HAVE_INTTYPES_H, 1,
962 [Define if you have a working <inttypes.h> header file.])
965 dnl Disabled until we have a complete test for buggy enum bitfields.
966 dnl gcc_AC_C_ENUM_BF_UNSIGNED
968 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
969 ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
970 fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
971 fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
972 putchar_unlocked putc_unlocked)
973 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
974 sysconf strsignal getrusage nl_langinfo \
975 gettimeofday mbstowcs wcswidth mmap mincore setlocale \
978 save_CPPFLAGS="$CPPFLAGS"
980 LIBS="$LIBS $LIBELFLIBS"
981 AC_CHECK_FUNCS(elf_getshdrstrndx,,
982 [AC_CHECK_FUNCS(elf_getshstrndx,
983 [AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
987 return elf_getshstrndx (NULL, 0) == 0;
988 }]])], AC_DEFINE(HAVE_ELF_GETSHSTRNDX_GABI, 1,
989 [Define if elf_getshstrndx has gABI conformant return values.]))])]
992 CPPFLAGS="$save_CPPFLAGS"
994 if test x$ac_cv_func_mbstowcs = xyes; then
995 AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
996 [ AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1002 [gcc_cv_func_mbstowcs_works=yes],
1003 [gcc_cv_func_mbstowcs_works=no],
1004 [gcc_cv_func_mbstowcs_works=yes])])
1005 if test x$gcc_cv_func_mbstowcs_works = xyes; then
1006 AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1007 [Define this macro if mbstowcs does not crash when its
1008 first argument is NULL.])
1012 AC_CHECK_TYPE(ssize_t, int)
1013 AC_CHECK_TYPE(caddr_t, char *)
1015 gcc_AC_FUNC_MMAP_BLACKLIST
1019 # Under VMS, vfork works very differently than on Unix. The standard test
1020 # won't work, and it isn't easily adaptable. It makes more sense to
1022 ac_cv_func_vfork_works=yes
1028 # Until we have in-tree GNU iconv:
1030 AC_SUBST(LIBICONV_DEP)
1036 # We will need to find libiberty.h and ansidecl.h
1037 saved_CFLAGS="$CFLAGS"
1038 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
1039 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1040 strsignal strstr strverscmp \
1041 errno snprintf vsnprintf vasprintf malloc realloc calloc \
1042 free basename getopt clock getpagesize gcc_UNLOCKED_FUNCS, , ,[
1043 #include "ansidecl.h"
1044 #include "system.h"])
1046 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1047 #include "ansidecl.h"
1049 #ifdef HAVE_SYS_RESOURCE_H
1050 #include <sys/resource.h>
1054 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1055 #include "ansidecl.h"
1057 #ifdef HAVE_SYS_RESOURCE_H
1058 #include <sys/resource.h>
1060 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1061 [Define to `long' if <sys/resource.h> doesn't define.])])
1063 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1064 # FREAD and FWRITE macros. Fortunately, for GCC's single usage of ldgetname
1065 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1066 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1067 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1068 #include "ansidecl.h"
1077 gcc_AC_CHECK_DECLS(times, , ,[
1078 #include "ansidecl.h"
1080 #ifdef HAVE_SYS_TIMES_H
1081 #include <sys/times.h>
1085 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1086 #include "ansidecl.h"
1091 # More time-related stuff.
1092 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1093 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1094 #include "ansidecl.h"
1096 #ifdef HAVE_SYS_TIMES_H
1097 #include <sys/times.h>
1099 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1100 if test $ac_cv_struct_tms = yes; then
1101 AC_DEFINE(HAVE_STRUCT_TMS, 1,
1102 [Define if <sys/times.h> defines struct tms.])
1105 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1106 # revisit after autoconf 2.50.
1107 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1108 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1109 #include "ansidecl.h"
1111 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1112 if test $gcc_cv_type_clock_t = yes; then
1113 AC_DEFINE(HAVE_CLOCK_T, 1,
1114 [Define if <time.h> defines clock_t.])
1117 # Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1118 CFLAGS="$saved_CFLAGS"
1120 gcc_AC_INITFINI_ARRAY
1122 # mkdir takes a single argument on some systems.
1123 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1131 # With Setjmp/Longjmp based exception handling.
1132 AC_ARG_ENABLE(sjlj-exceptions,
1133 [ --enable-sjlj-exceptions
1134 arrange to use setjmp/longjmp exception handling],
1137 if test $enableval != yes; then
1138 AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1143 force_sjlj_exceptions=yes],
1146 force_sjlj_exceptions=yes
1150 force_sjlj_exceptions=no
1153 if test $force_sjlj_exceptions = yes; then
1154 sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1155 AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1156 [Define 0/1 to force the choice for exception handling model.])
1159 # For platforms with the unwind ABI which includes an unwind library,
1160 # libunwind, we can choose to use the system libunwind.
1161 # config.gcc also contains tests of with_system_libunwind.
1162 GCC_CHECK_UNWIND_GETIPINFO
1164 # --------------------------------------------------------
1165 # Build, host, and target specific configuration fragments
1166 # --------------------------------------------------------
1168 # Collect build-machine-specific information.
1169 . ${srcdir}/config.build
1171 # Collect host-machine-specific information.
1172 . ${srcdir}/config.host
1176 # Collect target-machine-specific information.
1177 . ${srcdir}/config.gcc
1179 extra_objs="${host_extra_objs} ${extra_objs}"
1180 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1182 # Default the target-machine variables that were not explicitly set.
1183 if test x"$tm_file" = x
1184 then tm_file=$cpu_type/$cpu_type.h; fi
1186 if test x"$extra_headers" = x
1187 then extra_headers=; fi
1189 if test x$md_file = x
1190 then md_file=$cpu_type/$cpu_type.md; fi
1192 if test x$out_file = x
1193 then out_file=$cpu_type/$cpu_type.c; fi
1195 if test x"$tmake_file" = x
1196 then tmake_file=$cpu_type/t-$cpu_type
1199 if test x"$dwarf2" = xyes
1200 then tm_file="$tm_file tm-dwarf2.h"
1203 # Say what files are being used for the output code and MD file.
1204 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1205 echo "Using \`$srcdir/config/$md_file' as machine description file."
1207 # If any of the xm_file variables contain nonexistent files, warn
1208 # about them and drop them.
1211 for x in $build_xm_file; do
1212 if test -f $srcdir/config/$x
1214 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1220 for x in $host_xm_file; do
1221 if test -f $srcdir/config/$x
1223 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1229 for x in $xm_file; do
1230 if test -f $srcdir/config/$x
1232 else AC_MSG_WARN($srcdir/config/$x does not exist.)
1238 for f in $tm_file; do
1241 if test $count = ax; then
1242 echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1244 echo "Using the following target machine macro files:"
1245 for f in $tm_file; do
1246 echo " $srcdir/config/$f"
1250 if test x$need_64bit_hwint = xyes; then
1251 AC_DEFINE(NEED_64BIT_HOST_WIDE_INT, 1,
1252 [Define to 1 if HOST_WIDE_INT must be 64 bits wide (see hwint.h).])
1255 if test x$use_long_long_for_widest_fast_int = xyes; then
1256 AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1257 [Define to 1 if the 'long long' (or '__int64') is wider than 'long' but still
1258 efficiently supported by the host hardware.])
1262 for f in $host_xm_file; do
1265 if test $count = a; then
1267 elif test $count = ax; then
1268 echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1270 echo "Using the following host machine macro files:"
1271 for f in $host_xm_file; do
1272 echo " $srcdir/config/$f"
1275 echo "Using ${out_host_hook_obj} for host machine hooks."
1277 if test "$host_xm_file" != "$build_xm_file"; then
1279 for f in $build_xm_file; do
1282 if test $count = a; then
1284 elif test $count = ax; then
1285 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1287 echo "Using the following build machine macro files:"
1288 for f in $build_xm_file; do
1289 echo " $srcdir/config/$f"
1296 AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1297 gcc_cv_mcontext_underscores,
1299 #include <sys/cdefs.h>
1300 #include <sys/signal.h>
1301 #include <ucontext.h>
1302 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1304 gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1305 if test $gcc_cv_mcontext_underscores = yes; then
1306 AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1307 [mcontext_t fields start with __])
1316 # Check if a valid thread package
1317 case ${enable_threads} in
1320 target_thread_file='single'
1324 target_thread_file='single'
1326 aix | dce | gnat | irix | posix | posix95 | rtems | \
1327 single | solaris | vxworks | win32 | mipssde)
1328 target_thread_file=${enable_threads}
1331 echo "${enable_threads} is an unknown thread package" 1>&2
1336 if test x${thread_file} = x; then
1337 # No thread file set by target-specific clauses in config.gcc,
1338 # so use file chosen by default logic above
1339 thread_file=${target_thread_file}
1342 # Make gthr-default.h if we have a thread file.
1344 if test $thread_file != single; then
1345 echo "#include \"gthr-${thread_file}.h\"" > gthr-default.h-t
1346 if diff gthr-default.h-t gthr-default.h 2>/dev/null; then
1347 rm -f gthr-default.h-t
1349 mv -f gthr-default.h-t gthr-default.h
1351 gthread_flags=-DHAVE_GTHR_DEFAULT
1353 AC_SUBST(gthread_flags)
1360 if test x$enable___cxa_atexit = xyes || \
1361 test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1362 if test x$host = x$target; then
1364 # mingw32 doesn't have __cxa_atexit but uses atexit registration
1365 # keyed to flag_use_cxa_atexit
1370 AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1371 [echo "__cxa_atexit can't be enabled on this target"])
1375 # We can't check for __cxa_atexit when building a cross, so assume
1379 if test x$use_cxa_atexit = xyes; then
1380 AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1381 [Define if you want to use __cxa_atexit, rather than atexit, to
1382 register C++ destructors for local statics and global objects.
1383 This is essential for fully standards-compliant handling of
1384 destructors, but requires __cxa_atexit in libc.])
1388 # Look for a file containing extra machine modes.
1389 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1390 extra_modes_file='$(srcdir)'/config/${extra_modes}
1391 AC_SUBST(extra_modes_file)
1392 AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1393 [Define to the name of a file containing a list of extra machine modes
1394 for this architecture.])
1397 # Convert extra_options into a form suitable for Makefile use.
1399 for f in $extra_options; do
1400 extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1402 AC_SUBST(extra_opt_files)
1404 # auto-host.h is the file containing items generated by autoconf and is
1405 # the first file included by config.h.
1406 # If host=build, it is correct to have bconfig include auto-host.h
1407 # as well. If host!=build, we are in error and need to do more
1408 # work to find out the build config parameters.
1409 if test x$host = x$build
1411 build_auto=auto-host.h
1413 # We create a subdir, then run autoconf in the subdir.
1414 # To prevent recursion we set host and build for the new
1415 # invocation of configure to the build for this invocation
1422 /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1423 *) realsrcdir=../${srcdir};;
1425 saved_CFLAGS="${CFLAGS}"
1426 CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1427 LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1428 ${realsrcdir}/configure \
1429 --enable-languages=${enable_languages-all} \
1430 --target=$target_alias --host=$build_alias --build=$build_alias
1431 CFLAGS="${saved_CFLAGS}"
1433 # We just finished tests for the build machine, so rename
1434 # the file auto-build.h in the gcc directory.
1435 mv auto-host.h ../auto-build.h
1438 build_auto=auto-build.h
1440 AC_SUBST(build_subdir)
1442 tm_file="${tm_file} defaults.h"
1443 tm_p_file="${tm_p_file} tm-preds.h"
1444 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1445 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1446 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1447 # put this back in temporarily.
1448 xm_file="auto-host.h ansidecl.h ${xm_file}"
1455 # Compile in configure arguments.
1456 if test -f configargs.h ; then
1457 # Being re-configured.
1458 gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1459 gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1461 gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1464 # Double all backslashes and backslash all quotes to turn
1465 # gcc_config_arguments into a C string.
1466 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1467 $gcc_config_arguments
1469 gcc_config_arguments_str=`cat conftest.out`
1472 cat > configargs.h <<EOF
1473 /* Generated automatically. */
1474 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1475 static const char thread_model[] = "$thread_file";
1477 static const struct {
1478 const char *name, *value;
1479 } configure_default_options[] = $configure_default_options;
1484 gcc_BASEVER=`cat $srcdir/BASE-VER`
1485 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1486 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1487 if test -f $srcdir/REVISION ; then
1488 gcc_REVISION=`cat $srcdir/REVISION`
1492 cat > plugin-version.h <<EOF
1493 #include "configargs.h"
1495 static char basever[] = "$gcc_BASEVER";
1496 static char datestamp[] = "$gcc_DATESTAMP";
1497 static char devphase[] = "$gcc_DEVPHASE";
1498 static char revision[] = "$gcc_REVISION";
1500 /* FIXME plugins: We should make the version information more precise.
1501 One way to do is to add a checksum. */
1503 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1505 configuration_arguments};
1509 # Internationalization
1510 ZW_GNU_GETTEXT_SISTER_DIR
1512 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1513 # -liconv on the link line twice.
1514 case "$LIBINTL" in *$LIBICONV*)
1518 AC_ARG_ENABLE(secureplt,
1519 [ --enable-secureplt enable -msecure-plt by default for PowerPC],
1522 AC_ARG_ENABLE(leading-mingw64-underscores,
1523 AS_HELP_STRING([--enable-leading-mingw64-underscores],
1524 [Enable leading underscores on 64 bit mingw targets]),
1526 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1527 [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1528 [Define if we should use leading underscore on 64 bit mingw targets])])
1531 [ --enable-cld enable -mcld by default for 32bit x86], [],
1534 AC_ARG_ENABLE(frame-pointer,
1535 [ --enable-frame-pointer enable -fno-omit-frame-pointer by default for 32bit x86], [],
1538 linux* | darwin[[8912]]*)
1539 # Enable -fomit-frame-pointer by default for Linux and Darwin with
1541 enable_frame_pointer=no
1544 enable_frame_pointer=yes
1549 # Windows32 Registry support for specifying GCC installation paths.
1550 AC_ARG_ENABLE(win32-registry,
1551 [ --disable-win32-registry
1552 disable lookup of installation paths in the
1553 Registry on Windows hosts
1554 --enable-win32-registry enable registry lookup (default)
1555 --enable-win32-registry=KEY
1556 use KEY instead of GCC version as the last portion
1557 of the registry key],,)
1560 win32 | pe | cygwin* | mingw32* | uwin*)
1561 if test "x$enable_win32_registry" != xno; then
1562 AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1565 if test "x$enable_win32_registry" != xno; then
1566 AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1567 [Define to 1 if installation paths should be looked up in the Windows
1568 Registry. Ignored on non-Windows hosts.])
1570 if test "x$enable_win32_registry" != xyes \
1571 && test "x$enable_win32_registry" != x; then
1572 AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1573 [Define to be the last component of the Windows registry key under which
1574 to look for installation paths. The full key used will be
1575 HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1576 The default is the GCC version number.])
1582 # Get an absolute path to the GCC top-level source directory
1583 holddir=`${PWDCMD-pwd}`
1585 topdir=`${PWDCMD-pwd}`
1588 # Conditionalize the makefile for this host machine.
1590 for f in ${host_xmake_file}
1592 if test -f ${srcdir}/config/$f
1594 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1598 # Conditionalize the makefile for this target machine.
1600 for f in ${tmake_file}
1602 if test -f ${srcdir}/config/$f
1604 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1607 tmake_file="${tmake_file_}"
1609 out_object_file=`basename $out_file .c`.o
1611 tm_file_list="options.h"
1612 tm_include_list="options.h insn-constants.h"
1613 for f in $tm_file; do
1616 f=`echo $f | sed 's/^..//'`
1617 tm_file_list="${tm_file_list} $f"
1618 tm_include_list="${tm_include_list} $f"
1621 tm_file_list="${tm_file_list} \$(srcdir)/$f"
1622 tm_include_list="${tm_include_list} $f"
1625 tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1626 tm_include_list="${tm_include_list} config/$f"
1633 for f in $tm_p_file; do
1636 tm_p_file_list="${tm_p_file_list} $f"
1637 tm_p_include_list="${tm_p_include_list} $f"
1640 tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1641 tm_p_include_list="${tm_p_include_list} config/$f"
1647 for f in $xm_file; do
1650 xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1651 xm_include_list="${xm_include_list} $f"
1654 xm_file_list="${xm_file_list} $f"
1655 xm_include_list="${xm_include_list} $f"
1658 xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1659 xm_include_list="${xm_include_list} config/$f"
1665 host_xm_include_list=
1666 for f in $host_xm_file; do
1669 host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1670 host_xm_include_list="${host_xm_include_list} $f"
1673 host_xm_file_list="${host_xm_file_list} $f"
1674 host_xm_include_list="${host_xm_include_list} $f"
1677 host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1678 host_xm_include_list="${host_xm_include_list} config/$f"
1684 for f in $build_xm_file; do
1687 build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1688 build_xm_include_list="${build_xm_include_list} $f"
1690 auto-build.h | auto-host.h )
1691 build_xm_file_list="${build_xm_file_list} $f"
1692 build_xm_include_list="${build_xm_include_list} $f"
1695 build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1696 build_xm_include_list="${build_xm_include_list} config/$f"
1701 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1702 # cross-compiler which does not use the native headers and libraries.
1703 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1704 CROSS= AC_SUBST(CROSS)
1705 ALL=all.internal AC_SUBST(ALL)
1706 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1708 if test "x$with_build_sysroot" != x; then
1709 build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1711 # This value is used, even on a native system, because
1712 # CROSS_SYSTEM_HEADER_DIR is just
1713 # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1714 build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1717 if test x$host != x$target
1719 CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1721 SYSTEM_HEADER_DIR=$build_system_header_dir
1722 case "$host","$target" in
1723 # Darwin crosses can use the host system's libraries and headers,
1724 # because of the fat library support. Of course, it must be the
1725 # same version of Darwin on both sides. Allow the user to
1726 # just say --target=foo-darwin without a version number to mean
1727 # "the version on this system".
1728 *-*-darwin*,*-*-darwin*)
1729 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1730 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1731 if test $hostos = $targetos -o $targetos = darwin ; then
1733 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1738 i?86-*-*,x86_64-*-* \
1739 | powerpc*-*-*,powerpc64*-*-*)
1740 CROSS="$CROSS -DNATIVE_CROSS" ;;
1742 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1743 SYSTEM_HEADER_DIR=$build_system_header_dir
1746 # If this is a cross-compiler that does not
1747 # have its own set of headers then define
1750 # If this is using newlib, without having the headers available now,
1751 # then define inhibit_libc in LIBGCC2_CFLAGS.
1752 # This prevents libgcc2 from containing any code which requires libc
1754 : ${inhibit_libc=false}
1755 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1756 test x$with_newlib = xyes ; } &&
1757 { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
1760 AC_SUBST(inhibit_libc)
1762 # When building gcc with a cross-compiler, we need to adjust things so
1763 # that the generator programs are still built with the native compiler.
1764 # Also, we cannot run fixincludes.
1766 # These are the normal (build=host) settings:
1767 CC_FOR_BUILD='$(CC)' AC_SUBST(CC_FOR_BUILD)
1768 BUILD_CFLAGS='$(ALL_CFLAGS)' AC_SUBST(BUILD_CFLAGS)
1769 BUILD_LDFLAGS='$(LDFLAGS)' AC_SUBST(BUILD_LDFLAGS)
1770 STMP_FIXINC=stmp-fixinc AC_SUBST(STMP_FIXINC)
1772 # And these apply if build != host, or we are generating coverage data
1773 if test x$build != x$host || test "x$coverage_flags" != x
1775 BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1776 BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
1779 # Expand extra_headers to include complete path.
1780 # This substitutes for lots of t-* files.
1782 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1783 for file in ${extra_headers} ; do
1784 extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1787 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
1788 if test x"$use_gcc_tgmath" = xyes
1789 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
1792 # Define collect2 in Makefile.
1793 case $host_can_use_collect2 in
1795 *) collect2='collect2$(exeext)' ;;
1797 AC_SUBST([collect2])
1799 # Add a definition of USE_COLLECT2 if system wants one.
1800 case $use_collect2 in
1801 no) use_collect2= ;;
1804 host_xm_defines="${host_xm_defines} USE_COLLECT2"
1805 xm_defines="${xm_defines} USE_COLLECT2"
1806 case $host_can_use_collect2 in
1808 AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1814 # ---------------------------
1815 # Assembler & linker features
1816 # ---------------------------
1818 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
1819 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
1820 # However when ld-new is first executed from the build tree, libtool will
1821 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
1822 # to the build tree. While doing this we need to use the previous-stage
1823 # linker, or we have an infinite loop. The presence of a shell script as
1824 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
1825 # the gcc/collect-ld script. So we need to know how libtool works, or
1826 # exec-tool will fail.
1828 m4_defun([_LT_CONFIG_COMMANDS], [])
1831 AC_SUBST(enable_fast_install)
1833 # Identify the assembler which will work hand-in-glove with the newly
1834 # built GCC, so that we can examine its features. This is the assembler
1835 # which will be driven by the driver program.
1837 # If build != host, and we aren't building gas in-tree, we identify a
1838 # build->target assembler and hope that it will have the same features
1839 # as the host->target assembler we'll be using.
1840 gcc_cv_gas_major_version=
1841 gcc_cv_gas_minor_version=
1842 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
1844 m4_pattern_allow([AS_FOR_TARGET])dnl
1845 AS_VAR_SET_IF(gcc_cv_as,, [
1846 if test -x "$DEFAULT_ASSEMBLER"; then
1847 gcc_cv_as="$DEFAULT_ASSEMBLER"
1848 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
1849 && test -f ../gas/Makefile \
1850 && test x$build = x$host; then
1851 gcc_cv_as=../gas/as-new$build_exeext
1852 elif test -x as$build_exeext; then
1853 # Build using assembler in the current directory.
1854 gcc_cv_as=./as$build_exeext
1855 elif test -x $AS_FOR_TARGET; then
1856 gcc_cv_as="$AS_FOR_TARGET"
1858 AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
1861 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
1862 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
1863 case "$ORIGINAL_AS_FOR_TARGET" in
1864 ./as | ./as$build_exeext) ;;
1865 *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
1868 AC_MSG_CHECKING(what assembler to use)
1869 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
1870 # Single tree build which includes gas. We want to prefer it
1871 # over whatever linker top-level may have detected, since
1872 # we'll use what we're building after installation anyway.
1873 AC_MSG_RESULT(newly built gas)
1875 _gcc_COMPUTE_GAS_VERSION
1876 in_tree_gas_is_elf=no
1877 if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
1878 || (grep 'obj_format = multi' ../gas/Makefile \
1879 && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
1881 in_tree_gas_is_elf=yes
1884 AC_MSG_RESULT($gcc_cv_as)
1888 # Identify the linker which will work hand-in-glove with the newly
1889 # built GCC, so that we can examine its features. This is the linker
1890 # which will be driven by the driver program.
1892 # If build != host, and we aren't building gas in-tree, we identify a
1893 # build->target linker and hope that it will have the same features
1894 # as the host->target linker we'll be using.
1895 gcc_cv_gld_major_version=
1896 gcc_cv_gld_minor_version=
1897 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
1898 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
1900 AS_VAR_SET_IF(gcc_cv_ld,, [
1901 if test -x "$DEFAULT_LINKER"; then
1902 gcc_cv_ld="$DEFAULT_LINKER"
1903 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
1904 && test -f ../ld/Makefile \
1905 && test x$build = x$host; then
1906 gcc_cv_ld=../ld/ld-new$build_exeext
1907 elif test -x collect-ld$build_exeext; then
1908 # Build using linker in the current directory.
1909 gcc_cv_ld=./collect-ld$build_exeext
1910 elif test -x $LD_FOR_TARGET; then
1911 gcc_cv_ld="$LD_FOR_TARGET"
1913 AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
1916 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
1917 PLUGIN_LD=`basename $gcc_cv_ld`
1918 AC_ARG_WITH(plugin-ld,
1919 [ --with-plugin-ld=[[ARG]] specify the plugin linker],
1920 [if test x"$withval" != x; then
1921 ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
1922 PLUGIN_LD="$withval"
1924 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
1925 AC_DEFINE_UNQUOTED(PLUGIN_LD, "$PLUGIN_LD", [Specify plugin linker])
1927 # Check to see if we are using gold instead of ld
1928 AC_MSG_CHECKING(whether we are using gold)
1930 if test x$gcc_cv_ld != x; then
1931 if $gcc_cv_ld --version 2>/dev/null | sed 1q \
1932 | grep "GNU gold" > /dev/null; then
1936 AC_MSG_RESULT($ld_is_gold)
1938 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
1939 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
1940 case "$ORIGINAL_LD_FOR_TARGET" in
1941 ./collect-ld | ./collect-ld$build_exeext) ;;
1942 *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
1945 AC_MSG_CHECKING(what linker to use)
1946 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext; then
1947 # Single tree build which includes ld. We want to prefer it
1948 # over whatever linker top-level may have detected, since
1949 # we'll use what we're building after installation anyway.
1950 AC_MSG_RESULT(newly built ld)
1952 in_tree_ld_is_elf=no
1953 if (grep 'EMUL = .*elf' ../ld/Makefile \
1954 || grep 'EMUL = .*linux' ../ld/Makefile \
1955 || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
1956 in_tree_ld_is_elf=yes
1958 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
1961 gcc_cv_gld_version=`sed -n -e 's/^[ ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
1962 if test x$gcc_cv_gld_version != x; then
1966 gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
1967 gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
1970 AC_MSG_RESULT($gcc_cv_ld)
1974 # Figure out what nm we will be using.
1975 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
1976 AS_VAR_SET_IF(gcc_cv_nm,, [
1977 if test -f $gcc_cv_binutils_srcdir/configure.in \
1978 && test -f ../binutils/Makefile \
1979 && test x$build = x$host; then
1980 gcc_cv_nm=../binutils/nm-new$build_exeext
1981 elif test -x nm$build_exeext; then
1982 gcc_cv_nm=./nm$build_exeext
1983 elif test -x $NM_FOR_TARGET; then
1984 gcc_cv_nm="$NM_FOR_TARGET"
1986 AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
1989 AC_MSG_CHECKING(what nm to use)
1990 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
1991 # Single tree build which includes binutils.
1992 AC_MSG_RESULT(newly built nm)
1995 AC_MSG_RESULT($gcc_cv_nm)
1999 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2000 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2001 case "$ORIGINAL_NM_FOR_TARGET" in
2002 ./nm | ./nm$build_exeext) ;;
2003 *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2007 # Figure out what objdump we will be using.
2008 AS_VAR_SET_IF(gcc_cv_objdump,, [
2009 if test -f $gcc_cv_binutils_srcdir/configure.in \
2010 && test -f ../binutils/Makefile \
2011 && test x$build = x$host; then
2012 # Single tree build which includes binutils.
2013 gcc_cv_objdump=../binutils/objdump$build_exeext
2014 elif test -x objdump$build_exeext; then
2015 gcc_cv_objdump=./objdump$build_exeext
2016 elif test -x $OBJDUMP_FOR_TARGET; then
2017 gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2019 AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2022 AC_MSG_CHECKING(what objdump to use)
2023 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2024 # Single tree build which includes binutils.
2025 AC_MSG_RESULT(newly built objdump)
2026 elif test x$gcc_cv_objdump = x; then
2027 AC_MSG_RESULT(not found)
2029 AC_MSG_RESULT($gcc_cv_objdump)
2032 # Figure out what readelf we will be using.
2033 AS_VAR_SET_IF(gcc_cv_readelf,, [
2034 if test -f $gcc_cv_binutils_srcdir/configure.in \
2035 && test -f ../binutils/Makefile \
2036 && test x$build = x$host; then
2037 # Single tree build which includes binutils.
2038 gcc_cv_readelf=../binutils/readelf$build_exeext
2039 elif test -x readelf$build_exeext; then
2040 gcc_cv_readelf=./readelf$build_exeext
2042 AC_PATH_PROG(gcc_cv_readelf, readelf)
2045 AC_MSG_CHECKING(what readelf to use)
2046 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2047 # Single tree build which includes binutils.
2048 AC_MSG_RESULT(newly built readelf)
2049 elif test x$gcc_cv_readelf = x; then
2050 AC_MSG_RESULT(not found)
2052 AC_MSG_RESULT($gcc_cv_readelf)
2055 # Figure out what assembler alignment features are present.
2056 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2060 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2061 [Define if your assembler supports .balign and .p2align.])])
2063 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2066 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2067 [Define if your assembler supports specifying the maximum number
2068 of bytes to skip when using the GAS .p2align command.])])
2070 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2073 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2074 [Define if your assembler supports .literal16.])])
2076 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2078 [conftest_label1: .word 0
2080 conftest_label2: .word 0
2082 [if test x$gcc_cv_nm != x; then
2083 $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2084 $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2085 if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2087 else gcc_cv_as_subsection_m1=yes
2089 rm -f conftest.nm1 conftest.nm2
2091 [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2092 [Define if your assembler supports .subsection and .subsection -1 starts
2093 emitting at the beginning of your section.])])
2095 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2098 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2100 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2102 [ .weakref foobar, barfnot],,
2103 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2105 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2108 .NSUBSPA $CODE$,COMDAT],,
2109 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2111 # .hidden needs to be supported in both the assembler and the linker,
2112 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2113 # This is irritatingly difficult to feature test for; we have to check the
2114 # date string after the version number. If we've got an in-tree
2115 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2117 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2118 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2122 # Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with
2123 # STV_HIDDEN, so disable .hidden support if so.
2126 if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then
2127 cat > conftest.s <<EOF
2134 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
2135 && $gcc_cv_objdump -t conftest.o 2>/dev/null | \
2136 grep '\.hidden default' > /dev/null; then
2139 gcc_cv_as_hidden=yes
2142 # Assume bug is present if objdump is missing.
2147 gcc_cv_as_hidden=yes
2151 # gnu_indirect_function type is an extension proposed at
2152 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2153 # selection of function implementation
2154 AC_ARG_ENABLE(gnu-indirect-function,
2155 [AS_HELP_STRING([--enable-gnu-indirect-function],
2156 [enable the use of the @gnu_indirect_function to glibc systems])],
2157 [case $enable_gnu_indirect_function in
2159 *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2160 Valid choices are 'yes' and 'no'.]) ;;
2162 [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2163 if test x$enable_gnu_indirect_function = xyes; then
2164 AC_DEFINE(HAVE_GNU_INDIRECT_FUNCTION, 1,
2165 [Define if your system supports gnu indirect functions.])
2169 if test $in_tree_ld != yes ; then
2170 ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2171 if test x"$ld_is_gold" = xyes; then
2172 gcc_cv_ld_hidden=yes
2173 elif echo "$ld_ver" | grep GNU > /dev/null; then
2174 ld_vers=`echo $ld_ver | sed -n \
2175 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2176 ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2177 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2178 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2179 ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2184 # Solaris 2 ld -V output looks like this for a regular version:
2186 # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
2188 # but test versions add stuff at the end:
2190 # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
2192 ld_ver=`$gcc_cv_ld -V 2>&1`
2193 if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2194 ld_vers=`echo $ld_ver | sed -n \
2195 -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2196 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2197 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2205 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2206 [[if test $in_tree_ld = yes ; then
2208 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2209 && test $in_tree_ld_is_elf = yes; then
2210 gcc_cv_ld_hidden=yes
2213 gcc_cv_ld_hidden=yes
2214 if echo "$ld_ver" | grep GNU > /dev/null; then
2215 if test 0"$ld_date" -lt 20020404; then
2216 if test -n "$ld_date"; then
2217 # If there was date string, but was earlier than 2002-04-04, fail
2219 elif test -z "$ld_vers"; then
2220 # If there was no date string nor ld version number, something is wrong
2223 test -z "$ld_vers_patch" && ld_vers_patch=0
2224 if test "$ld_vers_major" -lt 2; then
2226 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2227 gcc_cv_ld_hidden="no"
2228 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2235 hppa64*-*-hpux* | ia64*-*-hpux*)
2236 gcc_cv_ld_hidden=yes
2239 # .hidden support was backported to Solaris 8, starting with ld
2241 if test "$ld_vers_minor" -ge 276; then
2242 gcc_cv_ld_hidden=yes
2247 *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
2248 # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2249 # .symbolic was only added in Solaris 9 12/02.
2250 gcc_cv_ld_hidden=yes
2258 libgcc_visibility=no
2259 AC_SUBST(libgcc_visibility)
2260 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2261 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2262 libgcc_visibility=yes
2263 AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2264 [Define if your assembler and linker support .hidden.])
2267 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2268 gcc_cv_ld_ro_rw_mix=unknown
2269 if test $in_tree_ld = yes ; then
2270 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2271 && test $in_tree_ld_is_elf = yes; then
2272 gcc_cv_ld_ro_rw_mix=read-write
2274 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2275 echo '.section myfoosect, "a"' > conftest1.s
2276 echo '.section myfoosect, "aw"' > conftest2.s
2277 echo '.byte 1' >> conftest2.s
2278 echo '.section myfoosect, "a"' > conftest3.s
2279 echo '.byte 0' >> conftest3.s
2280 if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2281 && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2282 && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2283 && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2284 conftest2.o conftest3.o > /dev/null 2>&1; then
2285 gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2286 | sed -e '/myfoosect/!d' -e N`
2287 if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2288 if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2289 gcc_cv_ld_ro_rw_mix=read-only
2291 gcc_cv_ld_ro_rw_mix=read-write
2296 rm -f conftest.* conftest[123].*
2299 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2300 AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2301 [Define if your linker links a mix of read-only
2302 and read-write sections into a read-write section.])
2304 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2306 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2307 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2315 [[# GAS versions before 2.11 do not support uleb128,
2316 # despite appearing to.
2317 # ??? There exists an elf-specific test that will crash
2318 # the assembler. Perhaps it's better to figure out whether
2319 # arbitrary sections are supported and try the test.
2320 as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2321 if echo "$as_ver" | grep GNU > /dev/null; then
2322 as_vers=`echo $as_ver | sed -n \
2323 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2324 as_major=`expr "$as_vers" : '\([0-9]*\)'`
2325 as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2326 if test $as_major -eq 2 && test $as_minor -lt 11
2328 else gcc_cv_as_leb128=yes
2331 [AC_DEFINE(HAVE_AS_LEB128, 1,
2332 [Define if your assembler supports .sleb128 and .uleb128.])])
2334 # Check if we have assembler support for unwind directives.
2335 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2342 .cfi_escape 1, 2, 3, 4, 5
2346 # If the linker used on Solaris (like Sun ld) isn't capable of merging
2347 # read-only and read-write sections, we need to make sure that the
2348 # assembler used emits read-write .eh_frame sections.
2349 if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2350 if test "x$gcc_cv_objdump" != x; then
2351 if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2352 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2353 gcc_cv_as_cfi_directive=no
2356 i?86-*-solaris2.1[[0-9]]*)
2357 # On Solaris/x86, make sure that GCC and gas agree on using
2358 # read-only .eh_frame sections for 64-bit.
2359 if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
2360 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2361 sed -e /.eh_frame/!d -e N | \
2362 grep READONLY > /dev/null; then
2363 gcc_cv_as_cfi_directive=yes
2365 gcc_cv_as_cfi_directive=no
2369 gcc_cv_as_cfi_directive=yes
2374 # no objdump, err on the side of caution
2375 gcc_cv_as_cfi_directive=no
2378 gcc_cv_as_cfi_directive=yes
2382 gcc_cv_as_cfi_directive=yes
2385 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2386 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2390 .cfi_adjust_cfa_offset 64
2392 .cfi_adjust_cfa_offset 128
2395 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2396 | grep 'DW_CFA_advance_loc[24]:[ ][ ]*75040[ ]' >/dev/null; then
2397 gcc_cv_as_cfi_advance_working=yes
2401 # no objdump, err on the side of caution
2402 gcc_cv_as_cfi_advance_working=no
2404 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2405 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2406 [`if test $gcc_cv_as_cfi_directive = yes \
2407 && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2408 [Define 0/1 if your assembler supports CFI directives.])
2410 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2411 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2412 gcc_cv_as_cfi_personality_directive, ,,
2415 .cfi_personality 0, symbol
2417 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2418 [`if test $gcc_cv_as_cfi_personality_directive = yes;
2419 then echo 1; else echo 0; fi`],
2420 [Define 0/1 if your assembler supports .cfi_personality.])
2422 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2423 gcc_cv_as_cfi_sections_directive, ,,
2425 .cfi_sections .debug_frame, .eh_frame
2429 win32 | pe | cygwin* | mingw32* | uwin*)
2430 # Need to check that we generated the correct relocation for the
2431 # .debug_frame section. This was fixed for binutils 2.21.
2432 gcc_cv_as_cfi_sections_directive=no
2433 if test "x$gcc_cv_objdump" != x; then
2434 if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2435 grep secrel > /dev/null; then
2436 gcc_cv_as_cfi_sections_directive=yes
2441 gcc_cv_as_cfi_sections_directive=yes
2444 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2445 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2446 [`if test $gcc_cv_as_cfi_sections_directive = yes;
2447 then echo 1; else echo 0; fi`],
2448 [Define 0/1 if your assembler supports .cfi_sections.])
2450 # GAS versions up to and including 2.11.0 may mis-optimize
2452 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2460 .section .eh_frame,"aw",@progbits
2462 .4byte .LECIE1-.LSCIE1
2476 .4byte .LEFDE1-.LASFDE1
2478 .4byte .LASFDE1-__FRAME_BEGIN__
2486 [ dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2487 cat > conftest.lit <<EOF
2488 0000 10000000 00000000 017a0001 781a0004 .........z..x...
2489 0010 01000000 12000000 18000000 00000000 ................
2490 0020 08000000 04080000 0044 .........D @&t@
2492 cat > conftest.big <<EOF
2493 0000 00000010 00000000 017a0001 781a0004 .........z..x...
2494 0010 00000001 00000012 00000018 00000000 ................
2495 0020 00000008 04000000 0844 .........D @&t@
2497 # If the assembler didn't choke, and we can objdump,
2498 # and we got the correct data, then succeed.
2499 # The text in the here-document typically retains its unix-style line
2500 # endings, while the output of objdump will use host line endings.
2501 # Therefore, use diff -b for the comparisons.
2502 if test x$gcc_cv_objdump != x \
2503 && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2504 | tail -3 > conftest.got \
2505 && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2506 || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2508 gcc_cv_as_eh_frame=yes
2509 elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2510 gcc_cv_as_eh_frame=buggy
2512 # Uh oh, what do we do now?
2513 gcc_cv_as_eh_frame=no
2516 if test $gcc_cv_as_eh_frame = buggy; then
2517 AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2518 [Define if your assembler mis-optimizes .eh_frame data.])
2521 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2522 [elf,2,12,0], [--fatal-warnings],
2523 [.section .rodata.str, "aMS", @progbits, 1])
2524 if test $gcc_cv_as_shf_merge = no; then
2525 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2526 [elf,2,12,0], [--fatal-warnings],
2527 [.section .rodata.str, "aMS", %progbits, 1])
2529 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2530 [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2531 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2533 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group,
2534 [elf,2,16,0], [--fatal-warnings],
2535 [.section .text,"axG",@progbits,.foo,comdat])
2536 if test $gcc_cv_as_comdat_group = yes; then
2537 gcc_cv_as_comdat_group_percent=no
2539 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group_percent,
2540 [elf,2,16,0], [--fatal-warnings],
2541 [.section .text,"axG",%progbits,.foo,comdat])
2543 if test x"$ld_is_gold" = xyes; then
2545 elif test $in_tree_ld = yes ; then
2547 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2548 && test $in_tree_ld_is_elf = yes; then
2551 elif echo "$ld_ver" | grep GNU > /dev/null; then
2553 if test 0"$ld_date" -lt 20050308; then
2554 if test -n "$ld_date"; then
2555 # If there was date string, but was earlier than 2005-03-08, fail
2557 elif test "$ld_vers_major" -lt 2; then
2559 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2566 *-*-solaris2.1[1-9]*)
2567 # Sun ld has COMDAT group support since Solaris 9, but it doesn't
2568 # interoperate with GNU as until Solaris 11 build 130, i.e. ld
2571 # FIXME: Maybe need to refine later when COMDAT group support with
2572 # Sun as is implemented.
2573 if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 1688; then
2580 # Assume linkers other than GNU ld don't support COMDAT group.
2586 # Allow overriding the automatic COMDAT group tests above.
2587 AC_ARG_ENABLE(comdat,
2588 [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
2589 [comdat_group="$enable_comdat"])
2590 if test $comdat_group = no; then
2591 gcc_cv_as_comdat_group=no
2592 gcc_cv_as_comdat_group_percent=no
2594 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2595 [`if test $gcc_cv_as_comdat_group = yes || test $gcc_cv_as_comdat_group_percent = yes; then echo 1; else echo 0; fi`],
2596 [Define 0/1 if your assembler and linker support COMDAT groups.])
2598 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2599 gcc_cv_as_discriminator,
2603 .loc 1 1 0 discriminator 1],,
2604 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2605 [Define if your assembler supports the .loc discriminator sub-directive.])])
2607 # Thread-local storage - the check is heavily parameterized.
2616 .section ".tdata","awT",@progbits
2619 ldq $27,__tls_get_addr($29) !literal!1
2620 lda $16,foo($29) !tlsgd!1
2621 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
2622 ldq $27,__tls_get_addr($29) !literal!2
2623 lda $16,foo($29) !tlsldm!2
2624 jsr $26,($27),__tls_get_addr !lituse_tlsldm!2
2625 ldq $1,foo($29) !gotdtprel
2626 ldah $2,foo($29) !dtprelhi
2627 lda $3,foo($2) !dtprello
2628 lda $4,foo($29) !dtprel
2629 ldq $1,foo($29) !gottprel
2630 ldah $2,foo($29) !tprelhi
2631 lda $3,foo($2) !tprello
2632 lda $4,foo($29) !tprel'
2635 tls_as_opt=--fatal-warnings
2637 cris-*-*|crisv32-*-*)
2639 .section ".tdata","awT",@progbits
2646 tls_as_opt=--fatal-warnings
2650 .section ".tdata","awT",@progbits
2662 .section ".tdata","awT",@progbits
2666 addil LT%foo-$tls_gdidx$,gp
2667 ldo RT%foo-$tls_gdidx$(%r1),%arg0
2670 addil LT%foo-$tls_ldidx$,gp
2672 ldo RT%foo-$tls_ldidx$(%r1),%arg0
2673 addil LR%foo-$tls_dtpoff$,%ret0
2674 ldo RR%foo-$tls_dtpoff$(%r1),%t1
2676 addil LT%foo-$tls_ieoff$,gp
2677 ldw RT%foo-$tls_ieoff$(%r1),%t2
2680 addil LR%foo-$tls_leoff$,%t1
2681 ldo RR%foo-$tls_leoff$(%r1),%t2'
2684 tls_as_opt=--fatal-warnings
2688 .section ".tdata","awT",%progbits
2701 i[34567]86-*-solaris2.*)
2703 tga_func=___tls_get_addr
2709 if test x$on_solaris = xyes && test x$gas_flag = xno; then
2711 .section .tdata,"awt",@progbits'
2715 AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
2716 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
2720 .section ".tdata","awT",@progbits'
2723 tls_as_opt="--fatal-warnings"
2725 conftest_s="$conftest_s
2729 leal foo@tlsgd(,%ebx,1), %eax
2730 leal foo@tlsldm(%ebx), %eax
2731 leal foo@dtpoff(%eax), %edx
2732 movl foo@gottpoff(%ebx), %eax
2733 subl foo@gottpoff(%ebx), %eax
2734 addl foo@gotntpoff(%ebx), %eax
2735 movl foo@indntpoff, %eax
2736 movl \$foo@tpoff, %eax
2737 subl \$foo@tpoff, %eax
2738 leal foo@ntpoff(%ecx), %eax"
2742 .section ".tdata","awT",@progbits
2746 leaq foo@TLSGD(%rip), %rdi
2747 leaq foo@TLSLD(%rip), %rdi
2748 leaq foo@DTPOFF(%rax), %rdx
2749 movq foo@GOTTPOFF(%rip), %rax
2750 movq $foo@TPOFF, %rax'
2753 tls_as_opt=--fatal-warnings
2757 .section ".tdata","awT",@progbits
2760 addl r16 = @ltoff(@dtpmod(foo#)), gp
2761 addl r17 = @ltoff(@dtprel(foo#)), gp
2762 addl r18 = @ltoff(@tprel(foo#)), gp
2763 addl r19 = @dtprel(foo#), gp
2764 adds r21 = @dtprel(foo#), r13
2765 movl r23 = @dtprel(foo#)
2766 addl r20 = @tprel(foo#), gp
2767 adds r22 = @tprel(foo#), r13
2768 movl r24 = @tprel(foo#)'
2771 tls_as_opt=--fatal-warnings
2775 .section .tdata,"awT",@progbits
2779 addiu $4, $28, %tlsgd(x)
2780 addiu $4, $28, %tlsldm(x)
2781 lui $4, %dtprel_hi(x)
2782 addiu $4, $4, %dtprel_lo(x)
2783 lw $4, %gottprel(x)($28)
2784 lui $4, %tprel_hi(x)
2785 addiu $4, $4, %tprel_lo(x)'
2788 tls_as_opt='-32 --fatal-warnings'
2792 .section .tdata,"awT",@progbits
2797 move.l x@TLSGD(%a5),%a0
2798 move.l x@TLSLDM(%a5),%a0
2799 move.l x@TLSLDO(%a5),%a0
2800 move.l x@TLSIE(%a5),%a0
2801 move.l x@TLSLE(%a5),%a0'
2804 tls_as_opt='--fatal-warnings'
2808 .section ".tdata","awT",@progbits
2816 addi 3,31,ld0@got@tlsgd
2818 addi 3,31,x1@got@tlsld
2821 addis 9,3,x2@dtprel@ha
2822 addi 9,9,x2@dtprel@l
2823 lwz 9,x3@got@tprel(31)
2826 addis 9,2,x2@tprel@ha
2827 addi 9,9,x2@tprel@l'
2830 tls_as_opt="-a32 --fatal-warnings"
2834 .section ".tdata","awT",@progbits
2842 addi 3,2,ld0@got@tlsgd
2848 addi 3,2,x1@got@tlsld
2854 addis 9,3,x2@dtprel@ha
2855 addi 9,9,x2@dtprel@l
2858 ld 9,x3@got@dtprel(2)
2864 tls_as_opt="-a64 --fatal-warnings"
2868 .section ".tdata","awT",@progbits
2877 l %r1,foo@GOTNTPOFF(%r12)
2878 l %r1,0(%r1):tls_load:foo
2879 bas %r14,0(%r1,%r13):tls_gdcall:foo
2880 bas %r14,0(%r1,%r13):tls_ldcall:foo'
2883 tls_as_opt="-m31 --fatal-warnings"
2887 .section ".tdata","awT",@progbits
2895 lg %r1,foo@GOTNTPOFF(%r12)
2896 larl %r1,foo@INDNTPOFF
2897 brasl %r14,__tls_get_offset@PLT:tls_gdcall:foo
2898 brasl %r14,__tls_get_offset@PLT:tls_ldcall:foo'
2901 tls_as_opt="-m64 -Aesame --fatal-warnings"
2903 sh-*-* | sh[34]-*-*)
2905 .section ".tdata","awT",@progbits
2915 tls_as_opt=--fatal-warnings
2919 sparc*-sun-solaris2.*)
2921 tga_func=__tls_get_addr
2927 if test x$on_solaris = xyes && test x$gas_flag = xno; then
2929 .section ".tdata",#alloc,#write,#tls'
2934 .section ".tdata","awT",@progbits'
2937 tls_as_opt="-32 --fatal-warnings"
2939 conftest_s="$conftest_s
2942 sethi %tgd_hi22(foo), %o0
2943 add %o0, %tgd_lo10(foo), %o1
2944 add %l7, %o1, %o0, %tgd_add(foo)
2945 call __tls_get_addr, %tgd_call(foo)
2946 sethi %tldm_hi22(foo), %l1
2947 add %l1, %tldm_lo10(foo), %l2
2948 add %l7, %l2, %o0, %tldm_add(foo)
2949 call __tls_get_addr, %tldm_call(foo)
2950 sethi %tldo_hix22(foo), %l3
2951 xor %l3, %tldo_lox10(foo), %l4
2952 add %o0, %l4, %l5, %tldo_add(foo)
2953 sethi %tie_hi22(foo), %o3
2954 add %o3, %tie_lo10(foo), %o3
2955 ld [%l7 + %o3], %o2, %tie_ld(foo)
2956 add %g7, %o2, %o4, %tie_add(foo)
2957 sethi %tle_hix22(foo), %l1
2958 xor %l1, %tle_lox10(foo), %o5
2959 ld [%g7 + %o5], %o1"
2963 .section ".tdata","awT",@progbits
2966 movi a8, foo@TLSFUNC
2967 movi a10, foo@TLSARG
2968 callx8.tls a8, foo@TLSCALL'
2975 if test "x$enable_tls" = xno ; then
2976 : # TLS explicitly disabled.
2977 elif test "x$enable_tls" = xyes ; then
2978 set_have_as_tls=yes # TLS explicitly enabled.
2979 elif test -z "$tls_first_major"; then
2980 : # If we don't have a check, assume no support.
2982 gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
2983 [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
2984 [set_have_as_tls=yes])
2987 # TLS was introduced in the Solaris 9 FCS release and backported to
2988 # Solaris 8 patches. Support for GNU-style TLS on x86 was only
2989 # introduced in Solaris 9 4/04, replacing the earlier Sun style that Sun
2990 # ld and GCC don't support any longer.
2992 AC_MSG_CHECKING(linker and ld.so.1 TLS support)
2994 # Check ld and ld.so.1 TLS support.
2995 if echo "$ld_ver" | grep GNU > /dev/null; then
2996 # Assume all interesting versions of GNU ld have TLS support.
2997 # FIXME: still need ld.so.1 support, i.e. ld version checks below.
3001 # Solaris 8/x86 ld has GNU style TLS support since version 1.280.
3003 min_tls_ld_vers_minor=280
3005 # Solaris 8/SPARC ld has TLS support since version 1.272.
3006 sparc*-*-solaris2.8)
3007 min_tls_ld_vers_minor=272
3009 # Solaris 9/x86 ld has GNU style TLS support since version 1.374.
3011 min_tls_ld_vers_minor=374
3013 # Solaris 9/SPARC and Solaris 10+ ld have TLS support since FCS.
3014 sparc*-*-solaris2.9 | *-*-solaris2.1[[0-9]]*)
3015 min_tls_ld_vers_minor=343
3018 if test "$ls_vers_major" -gt 1 || \
3019 test "$ld_vers_minor" -ge "$min_tls_ld_vers_minor"; then
3025 AC_MSG_RESULT($ld_tls_support)
3028 save_LDFLAGS="$LDFLAGS"
3032 AC_MSG_CHECKING(alternate thread library)
3034 # TLS support was backported to Solaris 8 patches, but only lives in
3035 # the alternate thread library which became the default in Solaris 9.
3036 # We want to always use that, irrespective of TLS support.
3038 # Take multilib subdir into account. There's no spec to handle
3039 # this. The 64 symlink exists since Solaris 8.
3040 lwp_dir=/usr/lib/lwp
3041 lwp_spec="-L$lwp_dir%{m64:/64} -R$lwp_dir%{m64:/64}"
3042 LDFLAGS="-L$lwp_dir -R$lwp_dir"
3049 # Always define LIB_THREAD_LDFLAGS_SPEC, even without TLS support.
3050 AC_DEFINE_UNQUOTED(LIB_THREAD_LDFLAGS_SPEC, "$lwp_spec",
3051 [Define to the linker flags to use for -pthread.])
3052 AC_MSG_RESULT($lwp_dir)
3054 AC_MSG_CHECKING(library containing $tga_func)
3055 # Before Solaris 10, __tls_get_addr (SPARC/x64) resp. ___tls_get_addr
3056 # (32-bit x86) only lived in libthread, so check for that. Keep
3057 # set_have_as_tls if found, disable if not.
3058 AC_SEARCH_LIBS([$tga_func], [thread],, [set_have_as_tls=no])
3059 # Clear LIBS if we cannot support TLS.
3060 if test $set_have_as_tls = no; then
3063 # Always define LIB_TLS_SPEC, even without TLS support.
3064 AC_DEFINE_UNQUOTED(LIB_TLS_SPEC, "$LIBS",
3065 [Define to the library containing __tls_get_addr/___tls_get_addr.])
3066 AC_MSG_RESULT($LIBS)
3069 LDFLAGS="$save_LDFLAGS"
3072 if test $set_have_as_tls = yes ; then
3073 AC_DEFINE(HAVE_AS_TLS, 1,
3074 [Define if your assembler and linker support thread-local storage.])
3077 # Target-specific assembler checks.
3079 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3080 gcc_cv_ld_static_dynamic=no
3081 if test $in_tree_ld = yes ; then
3082 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3083 gcc_cv_ld_static_dynamic=yes
3085 elif test x$gcc_cv_ld != x; then
3086 # Check if linker supports -Bstatic/-Bdynamic option
3087 if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3088 && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3089 gcc_cv_ld_static_dynamic=yes
3092 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3093 AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3094 [Define if your linker supports -Bstatic/-Bdynamic option.])
3096 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3098 if test x"$demangler_in_ld" = xyes; then
3099 AC_MSG_CHECKING(linker --demangle support)
3100 gcc_cv_ld_demangle=no
3101 if test $in_tree_ld = yes; then
3102 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3103 gcc_cv_ld_demangle=yes
3105 elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3106 # Check if the GNU linker supports --demangle option
3107 if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3108 gcc_cv_ld_demangle=yes
3111 if test x"$gcc_cv_ld_demangle" = xyes; then
3112 AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3113 [Define if your linker supports --demangle option.])
3115 AC_MSG_RESULT($gcc_cv_ld_demangle)
3119 # All TARGET_ABI_OSF targets.
3120 alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
3121 gcc_GAS_CHECK_FEATURE([explicit relocation support],
3122 gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3125 extbl $3, $2, $3 !lituse_bytoff!1
3126 ldq $2, a($29) !literal!1
3127 ldq $4, b($29) !literal!2
3128 ldq_u $3, 0($2) !lituse_base!1
3129 ldq $27, f($29) !literal!5
3130 jsr $26, ($27), f !lituse_jsr!5
3131 ldah $29, 0($26) !gpdisp!3
3132 lda $0, c($29) !gprel
3133 ldah $1, d($29) !gprelhigh
3134 lda $1, d($1) !gprellow
3135 lda $29, 0($29) !gpdisp!3],,
3136 [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3137 [Define if your assembler supports explicit relocations.])])
3138 gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3139 gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3142 ldq $27, a($29) !literal!1
3143 jsr $26, ($27), a !lituse_jsrdirect!1],,
3144 [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3145 [Define if your assembler supports the lituse_jsrdirect relocation.])])
3149 gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3150 gcc_cv_as_cris_no_mul_bug,[2,15,91],
3151 [-no-mul-bug-abort], [.text],,
3152 [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3153 [Define if your assembler supports the -no-mul-bug-abort option.])])
3157 gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3158 [.register %g2, #scratch],,
3159 [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3160 [Define if your assembler supports .register.])])
3162 gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3164 [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3165 [Define if your assembler supports -relax option.])])
3167 gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3168 gcc_cv_as_sparc_gotdata_op,,
3174 sethi %gdop_hix22(foo), %g1
3175 xor %g1, %gdop_lox10(foo), %g1
3176 ld [[%l7 + %g1]], %g2, %gdop(foo)],
3177 [if test x$gcc_cv_ld != x \
3178 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3179 if $gcc_cv_ld -v | grep GNU >/dev/null 2>&1; then
3180 if test x$gcc_cv_objdump != x; then
3181 if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3182 | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3183 gcc_cv_as_sparc_gotdata_op=no
3185 gcc_cv_as_sparc_gotdata_op=yes
3189 gcc_cv_as_sparc_gotdata_op=yes
3193 [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3194 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3196 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3197 gcc_cv_as_sparc_ua_pcrel,,
3205 .uaword %r_disp32(foo)],
3206 [if test x$gcc_cv_ld != x \
3207 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3208 gcc_cv_as_sparc_ua_pcrel=yes
3211 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3212 [Define if your assembler and linker support unaligned PC relative relocs.])
3214 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3215 gcc_cv_as_sparc_ua_pcrel_hidden,,
3220 .uaword %r_disp32(foo)
3221 .byte 0x32, 0x33, 0x34
3226 [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3227 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3228 && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3229 | grep ' 31000000 07323334' > /dev/null 2>&1; then
3230 if $gcc_cv_objdump -R conftest 2> /dev/null \
3231 | grep 'DISP32' > /dev/null 2>&1; then
3234 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3238 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3239 [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3240 ]) # unaligned pcrel relocs
3242 gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3243 gcc_cv_as_sparc_offsetable_lo10,,
3246 or %g1, %lo(ab) + 12, %g1
3247 or %g1, %lo(ab + 12), %g1],
3248 [if test x$gcc_cv_objdump != x \
3249 && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3250 | grep ' 82106000 82106000' > /dev/null 2>&1; then
3251 gcc_cv_as_sparc_offsetable_lo10=yes
3253 [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3254 [Define if your assembler supports offsetable %lo().])])
3258 i[34567]86-*-* | x86_64-*-*)
3262 # Full C++ conformance when using a shared libstdc++-v3 requires some
3263 # support from the Cygwin DLL, which in more recent versions exports
3264 # wrappers to aid in interposing and redirecting operators new, delete,
3265 # etc., as per n2800 #17.6.4.6 [replacement.functions]. Check if we
3266 # are configuring for a version of Cygwin that exports the wrappers.
3267 if test x$host = x$target; then
3268 AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3270 # Can't check presence of libc functions during cross-compile, so
3271 # we just have to assume we're building for an up-to-date target.
3272 gcc_ac_cygwin_dll_wrappers=yes
3274 AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3275 [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3276 [Define if you want to generate code by default that assumes that the
3277 Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3280 cygwin* | pe | mingw32*)
3281 # Recent binutils allows the three-operand form of ".comm" on PE. This
3282 # definition is used unconditionally to initialise the default state of
3283 # the target option variable that governs usage of the feature.
3284 gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3285 [2,19,52],,[.comm foo,1,32])
3286 AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3287 [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3288 [Define if your assembler supports specifying the alignment
3289 of objects allocated using the GAS .comm command.])
3290 # Used for DWARF 2 in PE
3291 gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3292 gcc_cv_as_ix86_pe_secrel32,
3298 [if test x$gcc_cv_ld != x \
3299 && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3300 gcc_cv_as_ix86_pe_secrel32=yes
3303 [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3304 [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3305 # Test if the assembler supports the extended form of the .section
3306 # directive that specifies section alignment. LTO support uses this,
3307 # but normally only after installation, so we warn but don't fail the
3308 # configure if LTO is enabled but the assembler does not support it.
3309 gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
3310 [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
3311 if test x$gcc_cv_as_section_has_align != xyes; then
3312 case ",$enable_languages," in
3314 AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
3321 gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3322 gcc_cv_as_ix86_filds,,,
3323 [filds mem; fists mem],,
3324 [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3325 [Define if your assembler uses filds and fists mnemonics.])])
3327 gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3328 gcc_cv_as_ix86_fildq,,,
3329 [fildq mem; fistpq mem],,
3330 [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3331 [Define if your assembler uses fildq and fistq mnemonics.])])
3333 gcc_GAS_CHECK_FEATURE([cmov syntax],
3334 gcc_cv_as_ix86_cmov_sun_syntax,,,
3335 [cmovl.l %edx, %eax],,
3336 [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3337 [Define if your assembler supports the Sun syntax for cmov.])])
3339 gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3340 gcc_cv_as_ix86_ffreep,,,
3342 [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3343 [Define if your assembler supports the ffreep mnemonic.])])
3345 gcc_GAS_CHECK_FEATURE([.quad directive],
3346 gcc_cv_as_ix86_quad,,,
3348 [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
3349 [Define if your assembler supports the .quad directive.])])
3351 gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3352 gcc_cv_as_ix86_sahf,,,
3355 [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3356 [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
3358 gcc_GAS_CHECK_FEATURE([swap suffix],
3359 gcc_cv_as_ix86_swap,,,
3360 [movl.s %esp, %ebp],,
3361 [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3362 [Define if your assembler supports the swap suffix.])])
3364 gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3365 gcc_cv_as_ix86_diff_sect_delta,,,
3373 [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3374 [Define if your assembler supports the subtraction of symbols in different sections.])])
3376 # These two are used unconditionally by i386.[ch]; it is to be defined
3377 # to 1 if the feature is present, 0 otherwise.
3378 gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3379 gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
3385 AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3386 [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3387 [Define true if the assembler supports '.long foo@GOTOFF'.])
3389 gcc_GAS_CHECK_FEATURE([rep and lock prefix],
3390 gcc_cv_as_ix86_rep_lock_prefix,,,
3392 lock addl %edi, (%eax,%esi)
3393 lock orl $0, (%esp)],,
3394 [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
3395 [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
3400 gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3401 gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3403 addl r15 = @ltoffx(x#), gp
3405 ld8.mov r16 = [[r15]], x#],,
3406 [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3407 [Define if your assembler supports ltoffx and ldxmov relocations.])])
3413 *-*-aix*) conftest_s=' .machine "pwr5"
3417 gcc_GAS_CHECK_FEATURE([.machine directive support],
3418 gcc_cv_as_machine_directive,,,
3419 [ .machine ppc7400])
3420 if test x$gcc_cv_as_machine_directive != xyes; then
3421 echo "*** This target requires an assembler supporting \".machine\"" >&2
3422 echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
3423 test x$build = x$target && exit 1
3427 *) conftest_s=' .machine power4
3432 gcc_GAS_CHECK_FEATURE([mfcr field support],
3433 gcc_cv_as_powerpc_mfcrf, [2,14,0],,
3435 [AC_DEFINE(HAVE_AS_MFCRF, 1,
3436 [Define if your assembler supports mfcr field.])])
3439 *-*-aix*) conftest_s=' .machine "pwr5"
3442 *) conftest_s=' .machine power5
3447 gcc_GAS_CHECK_FEATURE([popcntb support],
3448 gcc_cv_as_powerpc_popcntb, [2,17,0],,
3450 [AC_DEFINE(HAVE_AS_POPCNTB, 1,
3451 [Define if your assembler supports popcntb field.])])
3454 *-*-aix*) conftest_s=' .machine "pwr5x"
3457 *) conftest_s=' .machine power5
3462 gcc_GAS_CHECK_FEATURE([fp round support],
3463 gcc_cv_as_powerpc_fprnd, [2,17,0],,
3465 [AC_DEFINE(HAVE_AS_FPRND, 1,
3466 [Define if your assembler supports fprnd.])])
3469 *-*-aix*) conftest_s=' .machine "pwr6"
3472 *) conftest_s=' .machine power6
3477 gcc_GAS_CHECK_FEATURE([move fp gpr support],
3478 gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
3480 [AC_DEFINE(HAVE_AS_MFPGPR, 1,
3481 [Define if your assembler supports mffgpr and mftgpr.])])
3484 *-*-aix*) conftest_s=' .csect .text[[PR]]
3486 addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
3490 addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
3491 *) conftest_s=' .text
3493 addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
3496 gcc_GAS_CHECK_FEATURE([rel16 relocs],
3497 gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
3499 [AC_DEFINE(HAVE_AS_REL16, 1,
3500 [Define if your assembler supports R_PPC_REL16 relocs.])])
3503 *-*-aix*) conftest_s=' .machine "pwr6"
3506 *) conftest_s=' .machine power6
3511 gcc_GAS_CHECK_FEATURE([compare bytes support],
3512 gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
3514 [AC_DEFINE(HAVE_AS_CMPB, 1,
3515 [Define if your assembler supports cmpb.])])
3518 *-*-aix*) conftest_s=' .machine "pwr6"
3521 *) conftest_s=' .machine power6
3526 gcc_GAS_CHECK_FEATURE([decimal float support],
3527 gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
3529 [AC_DEFINE(HAVE_AS_DFP, 1,
3530 [Define if your assembler supports DFP instructions.])])
3533 *-*-aix*) conftest_s=' .machine "pwr7"
3536 *) conftest_s=' .machine power7
3541 gcc_GAS_CHECK_FEATURE([vector-scalar support],
3542 gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
3544 [AC_DEFINE(HAVE_AS_VSX, 1,
3545 [Define if your assembler supports VSX instructions.])])
3548 *-*-aix*) conftest_s=' .machine "pwr7"
3551 *) conftest_s=' .machine power7
3556 gcc_GAS_CHECK_FEATURE([popcntd support],
3557 gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
3559 [AC_DEFINE(HAVE_AS_POPCNTD, 1,
3560 [Define if your assembler supports POPCNTD instructions.])])
3563 *-*-aix*) conftest_s=' .csect .text[[PR]]
3565 *) conftest_s=' .text
3569 gcc_GAS_CHECK_FEATURE([lwsync support],
3570 gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
3572 [AC_DEFINE(HAVE_AS_LWSYNC, 1,
3573 [Define if your assembler supports LWSYNC instructions.])])
3576 *-*-aix*) conftest_s=' .machine "476"
3579 *) conftest_s=' .machine "476"
3584 gcc_GAS_CHECK_FEATURE([data cache invalidate support],
3585 gcc_cv_as_powerpc_dci, [9,99,0], -a32,
3587 [AC_DEFINE(HAVE_AS_DCI, 1,
3588 [Define if your assembler supports the DCI/ICI instructions.])])
3590 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3591 gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
3592 [.gnu_attribute 4,1],,
3593 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3594 [Define if your assembler supports .gnu_attribute.])])
3596 gcc_GAS_CHECK_FEATURE([tls marker support],
3597 gcc_cv_as_powerpc_tls_markers, [2,20,0],,
3598 [ bl __tls_get_addr(x@tlsgd)],,
3599 [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
3600 [Define if your assembler supports arg info for __tls_get_addr.])])
3604 gcc_GAS_CHECK_FEATURE([.ref support],
3605 gcc_cv_as_aix_ref, [2.21.0],,
3606 [ .csect stuff[[rw]]
3612 [AC_DEFINE(HAVE_AS_REF, 1,
3613 [Define if your assembler supports .ref])])
3619 gcc_GAS_CHECK_FEATURE([explicit relocation support],
3620 gcc_cv_as_mips_explicit_relocs, [2,14,0],,
3621 [ lw $4,%gp_rel(foo)($4)],,
3622 [if test x$target_cpu_default = x
3623 then target_cpu_default=MASK_EXPLICIT_RELOCS
3624 else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
3626 gcc_GAS_CHECK_FEATURE([-mno-shared support],
3627 gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
3628 [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
3629 [Define if the assembler understands -mno-shared.])])
3631 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3632 gcc_cv_as_mips_gnu_attribute, [2,18,0],,
3633 [.gnu_attribute 4,1],,
3634 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3635 [Define if your assembler supports .gnu_attribute.])])
3637 gcc_GAS_CHECK_FEATURE([.dtprelword support],
3638 gcc_cv_as_mips_dtprelword, [2,18,0],,
3639 [.section .tdata,"awT",@progbits
3643 .dtprelword x+0x8000],,
3644 [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
3645 [Define if your assembler supports .dtprelword.])])
3647 AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
3648 gcc_cv_as_ld_jalr_reloc=no
3649 if test $gcc_cv_as_mips_explicit_relocs = yes; then
3650 if test $in_tree_ld = yes ; then
3651 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
3652 && test $in_tree_ld_is_elf = yes; then
3653 gcc_cv_as_ld_jalr_reloc=yes
3655 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
3656 echo ' .ent x' > conftest.s
3657 echo 'x: ld $2,%got_disp(y)($3)' >> conftest.s
3658 echo ' ld $25,%call16(y)($28)' >> conftest.s
3659 echo ' .reloc 1f,R_MIPS_JALR,y' >> conftest.s
3660 echo '1: jalr $25' >> conftest.s
3661 echo ' .reloc 1f,R_MIPS_JALR,x' >> conftest.s
3662 echo '1: jalr $25' >> conftest.s
3663 echo ' .end x' >> conftest.s
3664 if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
3665 && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
3666 if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
3667 && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
3668 gcc_cv_as_ld_jalr_reloc=yes
3674 if test $gcc_cv_as_ld_jalr_reloc = yes; then
3675 if test x$target_cpu_default = x; then
3676 target_cpu_default=MASK_RELAX_PIC_CALLS
3678 target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
3681 AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
3683 AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
3684 [gcc_cv_ld_mips_personality_relaxation],
3685 [gcc_cv_ld_mips_personality_relaxation=no
3686 if test $in_tree_ld = yes ; then
3687 if test "$gcc_cv_gld_major_version" -eq 2 \
3688 -a "$gcc_cv_gld_minor_version" -ge 21 \
3689 -o "$gcc_cv_gld_major_version" -gt 2; then
3690 gcc_cv_ld_mips_personality_relaxation=yes
3692 elif test x$gcc_cv_as != x \
3693 -a x$gcc_cv_ld != x \
3694 -a x$gcc_cv_readelf != x ; then
3695 cat > conftest.s <<EOF
3697 .cfi_personality 0x80,indirect_ptr
3704 .section .data,"aw",@progbits
3708 if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
3709 && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
3710 if $gcc_cv_readelf -d conftest 2>&1 \
3711 | grep TEXTREL > /dev/null 2>&1; then
3713 elif $gcc_cv_readelf --relocs conftest 2>&1 \
3714 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
3717 gcc_cv_ld_mips_personality_relaxation=yes
3721 rm -f conftest.s conftest.o conftest])
3722 if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
3723 AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
3724 [Define if your linker can relax absolute .eh_frame personality
3725 pointers into PC-relative form.])
3730 # Mips and HP-UX need the GNU assembler.
3731 # Linux on IA64 might be able to use the Intel assembler.
3734 mips*-*-* | *-*-hpux* )
3735 if test x$gas_flag = xyes \
3736 || test x"$host" != x"$build" \
3737 || test ! -x "$gcc_cv_as" \
3738 || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
3741 echo "*** This configuration requires the GNU assembler" >&2
3747 # ??? Not all targets support dwarf2 debug_line, even within a version
3748 # of gas. Moreover, we need to emit a valid instruction to trigger any
3749 # info to the output file. So, as supported targets are added to gas 2.11,
3750 # add some instruction here to (also) show we expect this might work.
3751 # ??? Once 2.11 is released, probably need to add first known working
3752 # version to the per-target configury.
3754 i?86*-*-* | mips*-*-* | alpha*-*-* | powerpc*-*-* | sparc*-*-* | m68*-*-* \
3755 | x86_64*-*-* | hppa*-*-* | arm*-*-* | avr*-*-* \
3756 | xstormy16*-*-* | cris-*-* | crisv32-*-* | xtensa*-*-* | bfin-*-* | score*-*-* \
3757 | spu-*-* | fido*-*-* | m32c-*-* | microblaze-*-*)
3760 ia64*-*-* | s390*-*-*)
3767 if test x"$insn" != x; then
3769 .file 1 \"conftest.s\"
3772 gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
3773 gcc_cv_as_dwarf2_debug_line,
3774 [elf,2,11,0],, [$conftest_s],
3775 [if test x$gcc_cv_objdump != x \
3776 && $gcc_cv_objdump -h conftest.o 2> /dev/null \
3777 | grep debug_line > /dev/null 2>&1; then
3778 gcc_cv_as_dwarf2_debug_line=yes
3781 # The .debug_line file table must be in the exact order that
3782 # we specified the files, since these indices are also used
3783 # by DW_AT_decl_file. Approximate this test by testing if
3784 # the assembler bitches if the same index is assigned twice.
3785 gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
3786 gcc_cv_as_dwarf2_file_buggy,,,
3790 if test $gcc_cv_as_dwarf2_debug_line = yes \
3791 && test $gcc_cv_as_dwarf2_file_buggy = no; then
3792 AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
3793 [Define if your assembler supports dwarf2 .file/.loc directives,
3794 and preserves file table indices exactly as given.])
3797 gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
3798 gcc_cv_as_gdwarf2_flag,
3799 [elf,2,11,0], [--gdwarf2], [$insn],,
3800 [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
3801 [Define if your assembler supports the --gdwarf2 option.])])
3803 gcc_GAS_CHECK_FEATURE([--gstabs option],
3804 gcc_cv_as_gstabs_flag,
3805 [elf,2,11,0], [--gstabs], [$insn],
3806 [# The native Solaris 9/Intel assembler doesn't understand --gstabs
3807 # and warns about it, but still exits successfully. So check for
3809 if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
3811 else gcc_cv_as_gstabs_flag=yes
3813 [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
3814 [Define if your assembler supports the --gstabs option.])])
3816 gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
3817 gcc_cv_as_debug_prefix_map_flag,
3818 [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
3819 [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
3820 [Define if your assembler supports the --debug-prefix-map option.])])
3823 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
3826 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
3827 [Define if your assembler supports .lcomm with an alignment field.])])
3829 AC_ARG_ENABLE(gnu-unique-object,
3830 [ --enable-gnu-unique-object enable the use of the @gnu_unique_object ELF extension on
3832 [case $enable_gnu_unique_object in
3834 *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
3835 Valid choices are 'yes' and 'no'.]) ;;
3837 [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
3839 [.type foo, @gnu_unique_object],,
3840 # Also check for ld.so support, i.e. glibc 2.11 or higher.
3841 [[if test x$host = x$build -a x$host = x$target &&
3842 glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
3843 glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
3844 glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
3845 glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
3846 if test "$glibcnum" -ge 2011 ; then
3847 enable_gnu_unique_object=yes
3850 if test x$enable_gnu_unique_object = xyes; then
3851 AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
3852 [Define if your assembler supports @gnu_unique_object.])
3855 AC_CACHE_CHECK([assembler for tolerance to line number 0],
3856 [gcc_cv_as_line_zero],
3857 [gcc_cv_as_line_zero=no
3858 if test $in_tree_gas = yes; then
3859 gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
3860 elif test "x$gcc_cv_as" != x; then
3861 { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
3862 if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
3863 test "x`cat conftest.out`" = x
3865 gcc_cv_as_line_zero=yes
3867 echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
3868 cat conftest.s >&AS_MESSAGE_LOG_FD
3869 echo "configure: error output was" >&AS_MESSAGE_LOG_FD
3870 cat conftest.out >&AS_MESSAGE_LOG_FD
3872 rm -f conftest.o conftest.s conftest.out
3874 if test "x$gcc_cv_as_line_zero" = xyes; then
3875 AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
3876 [Define if the assembler won't complain about a line such as # 0 "" 2.])
3879 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
3880 gcc_cv_ld_eh_frame_hdr=no
3881 if test $in_tree_ld = yes ; then
3882 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
3883 && test $in_tree_ld_is_elf = yes; then
3884 gcc_cv_ld_eh_frame_hdr=yes
3886 elif test x$gcc_cv_ld != x; then
3887 # Check if linker supports --eh-frame-hdr option
3888 if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
3889 gcc_cv_ld_eh_frame_hdr=yes
3892 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
3893 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
3894 AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
3895 [Define if your linker supports --eh-frame-hdr option.])
3897 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
3899 AC_MSG_CHECKING(linker position independent executable support)
3901 if test $in_tree_ld = yes ; then
3902 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
3903 && test $in_tree_ld_is_elf = yes; then
3906 elif test x$gcc_cv_ld != x; then
3907 # Check if linker supports -pie option
3908 if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
3912 if test x"$gcc_cv_ld_pie" = xyes; then
3913 AC_DEFINE(HAVE_LD_PIE, 1,
3914 [Define if your linker supports -pie option.])
3916 AC_MSG_RESULT($gcc_cv_ld_pie)
3918 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
3919 gcc_cv_ld_eh_gc_sections=no
3920 if test $in_tree_ld = yes ; then
3921 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
3922 && test $in_tree_ld_is_elf = yes; then
3923 gcc_cv_ld_eh_gc_sections=yes
3925 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3926 cat > conftest.s <<EOF
3929 .type _start, @function
3932 .size _start, .-_start
3933 .section .text.foo,"ax",@progbits
3934 .type foo, @function
3938 .section .gcc_except_table.foo,"a",@progbits
3941 .section .eh_frame,"a",@progbits
3944 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3945 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3946 | grep "gc-sections option ignored" > /dev/null; then
3947 gcc_cv_ld_eh_gc_sections=no
3948 elif $gcc_cv_objdump -h conftest 2> /dev/null \
3949 | grep gcc_except_table > /dev/null; then
3950 gcc_cv_ld_eh_gc_sections=yes
3951 # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
3952 if test x$gcc_cv_as_comdat_group != xyes; then
3953 gcc_cv_ld_eh_gc_sections=no
3954 cat > conftest.s <<EOF
3957 .type _start, @function
3960 .size _start, .-_start
3961 .section .gnu.linkonce.t.foo,"ax",@progbits
3962 .type foo, @function
3966 .section .gcc_except_table.foo,"a",@progbits
3969 .section .eh_frame,"a",@progbits
3972 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3973 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3974 | grep "gc-sections option ignored" > /dev/null; then
3975 gcc_cv_ld_eh_gc_sections=no
3976 elif $gcc_cv_objdump -h conftest 2> /dev/null \
3977 | grep gcc_except_table > /dev/null; then
3978 gcc_cv_ld_eh_gc_sections=yes
3984 rm -f conftest.s conftest.o conftest
3988 # ??? This apparently exposes a binutils bug with PC-relative relocations.
3989 gcc_cv_ld_eh_gc_sections=no
3992 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
3993 AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
3994 [Define if your linker supports garbage collection of
3995 sections in presence of EH frames.])
3997 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
4003 AC_CACHE_CHECK(linker --as-needed support,
4004 gcc_cv_ld_as_needed,
4005 [gcc_cv_ld_as_needed=no
4006 if test $in_tree_ld = yes ; then
4007 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4008 && test $in_tree_ld_is_elf = yes; then
4009 gcc_cv_ld_as_needed=yes
4011 elif test x$gcc_cv_ld != x; then
4012 # Check if linker supports --as-needed and --no-as-needed options
4013 if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
4014 gcc_cv_ld_as_needed=yes
4018 if test x"$gcc_cv_ld_as_needed" = xyes; then
4019 AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
4020 [Define if your linker supports --as-needed and --no-as-needed options.])
4023 case "$target:$tm_file" in
4024 powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
4025 AC_CACHE_CHECK(linker support for omitting dot symbols,
4026 gcc_cv_ld_no_dot_syms,
4027 [gcc_cv_ld_no_dot_syms=no
4028 if test $in_tree_ld = yes ; then
4029 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
4030 gcc_cv_ld_no_dot_syms=yes
4032 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4033 cat > conftest1.s <<EOF
4037 cat > conftest2.s <<EOF
4038 .section ".opd","aw"
4043 .quad .LEfoo,.TOC.@tocbase,0
4049 if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
4050 && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
4051 && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
4052 gcc_cv_ld_no_dot_syms=yes
4054 rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
4057 if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
4058 AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
4059 [Define if your PowerPC64 linker only needs function descriptor syms.])
4062 AC_CACHE_CHECK(linker large toc support,
4063 gcc_cv_ld_large_toc,
4064 [gcc_cv_ld_large_toc=no
4065 if test $in_tree_ld = yes ; then
4066 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
4067 gcc_cv_ld_large_toc=yes
4069 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4070 cat > conftest.s <<EOF
4071 .section ".tbss","awT",@nobits
4077 addis 9,13,ie0@got@tprel@ha
4078 ld 9,ie0@got@tprel@l(9)
4080 if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
4081 && $gcc_cv_ld -melf64ppc --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
4082 gcc_cv_ld_large_toc=yes
4084 rm -f conftest conftest.o conftest.s
4087 if test x"$gcc_cv_ld_large_toc" = xyes; then
4088 AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4089 [Define if your PowerPC64 linker supports a large TOC.])
4094 AC_CACHE_CHECK(linker --build-id support,
4096 [gcc_cv_ld_buildid=no
4097 if test $in_tree_ld = yes ; then
4098 if test "$gcc_cv_gld_major_version" -eq 2 -a \
4099 "$gcc_cv_gld_minor_version" -ge 18 -o \
4100 "$gcc_cv_gld_major_version" -gt 2 \
4101 && test $in_tree_ld_is_elf = yes; then
4102 gcc_cv_ld_buildid=yes
4104 elif test x$gcc_cv_ld != x; then
4105 if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
4106 gcc_cv_ld_buildid=yes
4109 if test x"$gcc_cv_ld_buildid" = xyes; then
4110 AC_DEFINE(HAVE_LD_BUILDID, 1,
4111 [Define if your linker supports --build-id.])
4114 AC_ARG_ENABLE(linker-build-id,
4115 [ --enable-linker-build-id
4116 compiler will always pass --build-id to linker],
4118 enable_linker_build_id=no)
4120 if test x"$enable_linker_build_id" = xyes; then
4121 if test x"$gcc_cv_ld_buildid" = xyes; then
4122 AC_DEFINE(ENABLE_LD_BUILDID, 1,
4123 [Define if gcc should always pass --build-id to linker.])
4125 AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
4129 # In binutils 2.21, GNU ld gained support for new emulations fully
4130 # supporting the Solaris 2 ABI. Detect their presence in the linker used.
4131 AC_CACHE_CHECK(linker *_sol2 emulation support,
4132 gcc_cv_ld_sol2_emulation,
4133 [gcc_cv_ld_sol2_emulation=no
4134 if test $in_tree_ld = yes ; then
4135 if test "$gcc_cv_gld_major_version" -eq 2 -a \
4136 "$gcc_cv_gld_minor_version" -ge 21 -o \
4137 "$gcc_cv_gld_major_version" -gt 2 \
4138 && test $in_tree_ld_is_elf = yes; then
4139 gcc_cv_ld_sol2_emulation=yes
4141 elif test x$gcc_cv_ld != x; then
4142 if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
4143 grep _sol2 > /dev/null; then
4144 gcc_cv_ld_sol2_emulation=yes
4147 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
4148 AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
4149 [Define if your linker supports the *_sol2 emulations.])
4152 AC_CACHE_CHECK(linker --sysroot support,
4154 [gcc_cv_ld_sysroot=no
4155 if test $in_tree_ld = yes ; then
4156 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
4157 gcc_cv_ld_sysroot=yes
4159 elif test x$gcc_cv_ld != x; then
4160 if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
4161 gcc_cv_ld_sysroot=yes
4164 if test x"$gcc_cv_ld_sysroot" = xyes; then
4165 AC_DEFINE(HAVE_LD_SYSROOT, 1,
4166 [Define if your linker supports --sysroot.])
4169 if test x$with_sysroot = x && test x$host = x$target \
4170 && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4171 && test "$prefix" != "NONE"; then
4172 AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4173 [Define to PREFIX/include if cpp should also search that directory.])
4176 # Test for stack protector support in target C library.
4177 AC_CACHE_CHECK(__stack_chk_fail in target C library,
4178 gcc_cv_libc_provides_ssp,
4179 [gcc_cv_libc_provides_ssp=no
4181 *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
4182 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4183 if test "x$with_headers" != x; then
4184 glibc_header_dir=$with_headers
4185 elif test "x$with_sysroot" = x; then
4186 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4187 elif test "x$with_build_sysroot" != "x"; then
4188 glibc_header_dir="${with_build_sysroot}/usr/include"
4189 elif test "x$with_sysroot" = xyes; then
4190 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4192 glibc_header_dir="${with_sysroot}/usr/include"
4195 glibc_header_dir=/usr/include
4197 [# glibc 2.4 and later provides __stack_chk_fail and
4198 # either __stack_chk_guard, or TLS access to stack guard canary.
4199 if test -f $glibc_header_dir/features.h \
4200 && $EGREP '^[ ]*#[ ]*define[ ]+__GNU_LIBRARY__[ ]+([1-9][0-9]|[6-9])' \
4201 $glibc_header_dir/features.h > /dev/null; then
4202 if $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+([1-9][0-9]|[3-9])' \
4203 $glibc_header_dir/features.h > /dev/null; then
4204 gcc_cv_libc_provides_ssp=yes
4205 elif $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+2' \
4206 $glibc_header_dir/features.h > /dev/null \
4207 && $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC_MINOR__[ ]+([1-9][0-9]|[4-9])' \
4208 $glibc_header_dir/features.h > /dev/null; then
4209 gcc_cv_libc_provides_ssp=yes
4210 elif $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC__[ ]+1' \
4211 $glibc_header_dir/features.h > /dev/null && \
4212 test -f $glibc_header_dir/bits/uClibc_config.h && \
4213 $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC_HAS_SSP__[ ]+1' \
4214 $glibc_header_dir/bits/uClibc_config.h > /dev/null; then
4215 gcc_cv_libc_provides_ssp=yes
4220 # Avoid complicated tests (see
4221 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
4222 # simply assert that glibc does provide this, which is true for all
4223 # realistically usable GNU/Hurd configurations.
4224 gcc_cv_libc_provides_ssp=yes;;
4225 *-*-darwin* | *-*-freebsd*)
4226 AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
4227 [echo "no __stack_chk_fail on this target"])
4229 *) gcc_cv_libc_provides_ssp=no ;;
4232 if test x$gcc_cv_libc_provides_ssp = xyes; then
4233 AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
4234 [Define if your target C library provides stack protector support])
4237 # Check if TFmode long double should be used by default or not.
4238 # Some glibc targets used DFmode long double, but with glibc 2.4
4239 # and later they can use TFmode.
4241 powerpc*-*-linux* | \
4246 AC_ARG_WITH(long-double-128,
4247 [ --with-long-double-128 Use 128-bit long double by default.],
4248 gcc_cv_target_ldbl128="$with_long_double_128",
4249 [[gcc_cv_target_ldbl128=no
4250 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4251 if test "x$with_sysroot" = x; then
4252 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4253 elif test "x$with_build_sysroot" != "x"; then
4254 glibc_header_dir="${with_build_sysroot}/usr/include"
4255 elif test "x$with_sysroot" = xyes; then
4256 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4258 glibc_header_dir="${with_sysroot}/usr/include"
4261 glibc_header_dir=/usr/include
4263 grep '^[ ]*#[ ]*define[ ][ ]*__LONG_DOUBLE_MATH_OPTIONAL' \
4264 $glibc_header_dir/bits/wordsize.h > /dev/null 2>&1 \
4265 && gcc_cv_target_ldbl128=yes
4269 if test x$gcc_cv_target_ldbl128 = xyes; then
4270 AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
4271 [Define if TFmode long double should be the default])
4274 # Find out what GC implementation we want, or may, use.
4276 [ --with-gc={page,zone} choose the garbage collection mechanism to use
4284 AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
4287 AC_MSG_ERROR([$withval is an invalid option to --with-gc])
4292 echo "Using $GGC for garbage collection."
4294 # Libraries to use on the host. This will normally be set by the top
4295 # level Makefile. Here we simply capture the value for our Makefile.
4296 if test -z "${HOST_LIBS+set}"; then
4301 # Use the system's zlib library.
4303 zlibinc="-I\$(srcdir)/../zlib"
4304 AC_ARG_WITH(system-zlib,
4305 [ --with-system-zlib use installed libz],
4312 dnl Very limited version of automake's enable-maintainer-mode
4314 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
4315 dnl maintainer-mode is disabled by default
4316 AC_ARG_ENABLE(maintainer-mode,
4317 [ --enable-maintainer-mode
4318 enable make rules and dependencies not useful
4319 (and sometimes confusing) to the casual installer],
4320 maintainer_mode=$enableval,
4323 AC_MSG_RESULT($maintainer_mode)
4325 if test "$maintainer_mode" = "yes"; then
4336 # Make empty files to contain the specs and options for each language.
4337 # Then add #include lines to for a compiler that has specs and/or options.
4343 # These (without "all_") are set in each config-lang.in.
4344 # `language' must be a single word so is spelled singularly.
4347 all_outputs='Makefile gccbug'
4348 # List of language makefile fragments.
4350 # Additional files for gengtype
4351 all_gtfiles="$target_gtfiles"
4353 # These are the languages that are set in --enable-languages,
4354 # and are available in the GCC tree.
4355 all_selected_languages=
4357 # Add the language fragments.
4358 # Languages are added via two mechanisms. Some information must be
4359 # recorded in makefile variables, these are defined in config-lang.in.
4360 # We accumulate them and plug them into the main Makefile.
4361 # The other mechanism is a set of hooks for each of the main targets
4362 # like `clean', `install', etc.
4364 language_hooks="Make-hooks"
4366 for lang in ${srcdir}/*/config-lang.in
4369 test "$lang" = "${srcdir}/*/config-lang.in" && continue
4371 lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^ ]*\).*$,\1,p' $lang`
4372 if test "x$lang_alias" = x
4374 echo "$lang doesn't set \$language." 1>&2
4377 subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
4378 subdirs="$subdirs $subdir"
4380 # $gcc_subdir is where the gcc integration files are to be found
4381 # for a language, both for internal compiler purposes (compiler
4382 # sources implementing front-end to GCC tree converters), and for
4383 # build infrastructure purposes (Make-lang.in, etc.)
4385 # This will be <subdir> (relative to $srcdir) if a line like
4386 # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
4387 # is found in <langdir>/config-lang.in, and will remain <langdir>
4390 # Except for the language alias (fetched above), the regular
4391 # "config-lang.in" contents are always retrieved from $gcc_subdir,
4392 # so a <langdir>/config-lang.in setting gcc_subdir typically sets
4393 # only this and the language alias.
4395 gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^ ]*\).*$,\1,p' $lang`
4396 if [ "$gcc_subdir" = "" ]; then
4397 gcc_subdir="$subdir"
4400 case ",$enable_languages," in
4402 all_selected_languages="$all_selected_languages $lang_alias"
4403 if test -f $srcdir/$gcc_subdir/lang-specs.h; then
4404 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
4416 . ${srcdir}/$gcc_subdir/config-lang.in
4417 if test "x$language" = x
4419 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
4424 case ",$enable_languages," in
4427 for i in $subdir_requires; do
4428 test -f "${srcdir}/$i/config-lang.in" && continue
4436 all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
4437 if test -f $srcdir/$gcc_subdir/lang.opt; then
4438 lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
4440 if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
4441 lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
4443 all_languages="$all_languages $language"
4444 all_compilers="$all_compilers $compilers"
4445 all_outputs="$all_outputs $outputs"
4446 all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
4447 case ",$enable_languages," in
4449 AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
4451 AC_SUBST(enable_lto)
4452 # LTO needs to speak the platform's object file format, and has a
4453 # number of implementations of the required binary file access APIs.
4454 # ELF is the most common, and default. We only link libelf if ELF
4455 # is indeed the selected format.
4456 LTO_BINARY_READER=${lto_binary_reader}
4457 LTO_USE_LIBELF=-lelf
4458 if test "x$lto_binary_reader" != "xlto-elf" ; then
4461 AC_SUBST(LTO_BINARY_READER)
4462 AC_SUBST(LTO_USE_LIBELF)
4468 # Pick up gtfiles for c
4470 . ${srcdir}/c-config-lang.in
4471 all_gtfiles="$all_gtfiles [[c]] $gtfiles"
4474 for language in $all_selected_languages
4476 check_languages="$check_languages check-$language"
4479 # We link each language in with a set of hooks, reached indirectly via
4480 # lang.${target}. Only do so for selected languages.
4484 target_list="all.cross start.encap rest.encap tags \
4485 install-common install-man install-info install-pdf install-html dvi \
4486 pdf html uninstall info man srcextra srcman srcinfo \
4487 mostlyclean clean distclean maintainer-clean install-plugin"
4489 for t in $target_list
4492 for lang in $all_selected_languages
4496 echo "lang.$t: $x" >> Make-hooks
4505 echo "dir ." > .gdbinit
4506 echo "dir ${srcdir}" >> .gdbinit
4507 if test x$gdb_needs_out_file_path = xyes
4509 echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
4511 if test "x$subdirs" != x; then
4514 echo "dir ${srcdir}/$s" >> .gdbinit
4517 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
4519 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
4520 AC_SUBST(gcc_tooldir)
4523 # Find a directory in which to install a shared libgcc.
4525 AC_ARG_ENABLE(version-specific-runtime-libs,
4526 [ --enable-version-specific-runtime-libs
4527 specify that runtime libraries should be
4528 installed in a compiler-specific directory])
4530 AC_ARG_WITH(slibdir,
4531 [ --with-slibdir=DIR shared libraries in DIR [[LIBDIR]]],
4532 slibdir="$with_slibdir",
4533 if test "${enable_version_specific_runtime_libs+set}" = set; then
4534 slibdir='$(libsubdir)'
4535 elif test "$host" != "$target"; then
4536 slibdir='$(build_tooldir)/lib'
4542 # Substitute configuration variables
4545 AC_SUBST(all_compilers)
4546 AC_SUBST(all_gtfiles)
4547 AC_SUBST(all_lang_makefrags)
4548 AC_SUBST(all_languages)
4549 AC_SUBST(all_selected_languages)
4550 AC_SUBST(build_exeext)
4551 AC_SUBST(build_install_headers_dir)
4552 AC_SUBST(build_xm_file_list)
4553 AC_SUBST(build_xm_include_list)
4554 AC_SUBST(build_xm_defines)
4555 AC_SUBST(build_file_translate)
4556 AC_SUBST(check_languages)
4557 AC_SUBST(cpp_install_dir)
4558 AC_SUBST(xmake_file)
4559 AC_SUBST(tmake_file)
4560 AC_SUBST(TM_ENDIAN_CONFIG)
4561 AC_SUBST(TM_MULTILIB_CONFIG)
4562 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
4563 AC_SUBST(extra_gcc_objs)
4564 AC_SUBST(user_headers_inc_next_pre)
4565 AC_SUBST(user_headers_inc_next_post)
4566 AC_SUBST(extra_headers_list)
4567 AC_SUBST(extra_objs)
4568 AC_SUBST(extra_parts)
4569 AC_SUBST(extra_passes)
4570 AC_SUBST(extra_programs)
4571 AC_SUBST(float_h_file)
4572 AC_SUBST(gcc_config_arguments)
4573 AC_SUBST(gcc_gxx_include_dir)
4574 AC_SUBST(host_exeext)
4575 AC_SUBST(host_xm_file_list)
4576 AC_SUBST(host_xm_include_list)
4577 AC_SUBST(host_xm_defines)
4578 AC_SUBST(out_host_hook_obj)
4580 AC_SUBST(lang_opt_files)
4581 AC_SUBST(lang_specs_files)
4582 AC_SUBST(lang_tree_files)
4583 AC_SUBST(local_prefix)
4585 AC_SUBST(objc_boehm_gc)
4587 AC_SUBST(out_object_file)
4588 AC_SUBST(thread_file)
4589 AC_SUBST(tm_file_list)
4590 AC_SUBST(tm_include_list)
4591 AC_SUBST(tm_defines)
4592 AC_SUBST(tm_p_file_list)
4593 AC_SUBST(tm_p_include_list)
4594 AC_SUBST(xm_file_list)
4595 AC_SUBST(xm_include_list)
4596 AC_SUBST(xm_defines)
4597 AC_SUBST(use_gcc_stdint)
4598 AC_SUBST(c_target_objs)
4599 AC_SUBST(cxx_target_objs)
4600 AC_SUBST(fortran_target_objs)
4601 AC_SUBST(target_cpu_default)
4603 AC_SUBST_FILE(language_hooks)
4606 if test x${build} = x${host} ; then
4607 if test x${host} = x${target} ; then
4608 echo "Links are now set up to build a native compiler for ${target}." 1>&2
4610 echo "Links are now set up to build a cross-compiler" 1>&2
4611 echo " from ${host} to ${target}." 1>&2
4614 if test x${host} = x${target} ; then
4615 echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
4616 echo " for ${target}." 1>&2
4618 echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
4619 echo " from ${host} to ${target}." 1>&2
4623 AC_ARG_VAR(GMPLIBS,[How to link GMP])
4624 AC_ARG_VAR(GMPINC,[How to find GMP include files])
4626 AC_ARG_VAR(PPLLIBS,[How to link PPL])
4627 AC_ARG_VAR(PPLINC,[How to find PPL include files])
4629 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
4630 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
4631 if test "x${CLOOGLIBS}" != "x" ; then
4632 AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
4635 AC_ARG_VAR(LIBELFLIBS,[How to link libelf])
4636 AC_ARG_VAR(LIBELFINC,[How to find libelf include files])
4637 if test "x${LIBELFLIBS}" != "x" ; then
4638 AC_DEFINE(HAVE_libelf, 1, [Define if libelf is in use.])
4641 # Check for plugin support
4642 AC_ARG_ENABLE(plugin,
4643 [ --enable-plugin enable plugin support],
4644 enable_plugin=$enableval,
4645 enable_plugin=yes; default_plugin=yes)
4651 if test x$build = x$host; then
4652 export_sym_check="nm${exeext} -g"
4653 elif test x$host = x$target; then
4654 export_sym_check="$gcc_cv_nm -g"
4660 if test x$build = x$host; then
4661 export_sym_check="objdump${exeext} -T"
4662 elif test x$host = x$target; then
4663 export_sym_check="$gcc_cv_objdump -T"
4670 if test x"$enable_plugin" = x"yes"; then
4672 AC_MSG_CHECKING([for exported symbols])
4673 if test "x$export_sym_check" != x; then
4674 echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
4675 ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
4676 if $export_sym_check conftest | grep foobar > /dev/null; then
4677 : # No need to use a flag
4678 AC_MSG_RESULT([yes])
4680 AC_MSG_RESULT([yes])
4681 AC_MSG_CHECKING([for -rdynamic])
4682 ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
4683 if $export_sym_check conftest | grep foobar > /dev/null; then
4685 pluginlibs="-rdynamic"
4690 AC_MSG_RESULT([$plugin_rdynamic])
4693 AC_MSG_RESULT([unable to check])
4698 AC_SEARCH_LIBS([dlopen], [dl])
4699 if test x"$ac_cv_search_dlopen" = x"-ldl"; then
4700 pluginlibs="$pluginlibs -ldl"
4704 # Check that we can build shared objects with -fPIC -shared
4705 saved_LDFLAGS="$LDFLAGS"
4708 LDFLAGS="$LDFLAGS -fPIC -shared -undefined dynamic_lookup"
4711 LDFLAGS="$LDFLAGS -fPIC -shared"
4714 AC_MSG_CHECKING([for -fPIC -shared])
4716 [extern int X;],[return X == 0;],
4717 [AC_MSG_RESULT([yes]); have_pic_shared=yes],
4718 [AC_MSG_RESULT([no]); have_pic_shared=no])
4719 if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
4723 LDFLAGS="$saved_LDFLAGS"
4725 # If plugin support had been requested but not available, fail.
4726 if test x"$enable_plugin" = x"no" ; then
4727 if test x"$default_plugin" != x"yes"; then
4729 Building GCC with plugin support requires a host that supports
4730 -fPIC, -shared, -ldl and -rdynamic.])
4735 AC_SUBST(pluginlibs)
4736 AC_SUBST(enable_plugin)
4737 if test x"$enable_plugin" = x"yes"; then
4738 AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
4741 # Configure the subdirectories
4742 # AC_CONFIG_SUBDIRS($subdirs)
4744 # Create the Makefile
4745 # and configure language subdirectories
4746 AC_CONFIG_FILES($all_outputs)
4748 AC_CONFIG_COMMANDS([default],
4750 case ${CONFIG_HEADERS} in
4751 *auto-host.h:config.in*)
4754 # Make sure all the subdirs exist.
4755 for d in $subdirs doc build c-family
4757 test -d $d || mkdir $d
4760 [subdirs='$subdirs'])