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 $host_can_use_collect2 in
1808 AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1814 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
1815 [Define to the name of the LTO plugin DSO that must be
1816 passed to the linker's -plugin=LIB option.])
1818 # ---------------------------
1819 # Assembler & linker features
1820 # ---------------------------
1822 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
1823 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
1824 # However when ld-new is first executed from the build tree, libtool will
1825 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
1826 # to the build tree. While doing this we need to use the previous-stage
1827 # linker, or we have an infinite loop. The presence of a shell script as
1828 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
1829 # the gcc/collect-ld script. So we need to know how libtool works, or
1830 # exec-tool will fail.
1832 m4_defun([_LT_CONFIG_COMMANDS], [])
1835 AC_SUBST(enable_fast_install)
1837 # Identify the assembler which will work hand-in-glove with the newly
1838 # built GCC, so that we can examine its features. This is the assembler
1839 # which will be driven by the driver program.
1841 # If build != host, and we aren't building gas in-tree, we identify a
1842 # build->target assembler and hope that it will have the same features
1843 # as the host->target assembler we'll be using.
1844 gcc_cv_gas_major_version=
1845 gcc_cv_gas_minor_version=
1846 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
1848 m4_pattern_allow([AS_FOR_TARGET])dnl
1849 AS_VAR_SET_IF(gcc_cv_as,, [
1850 if test -x "$DEFAULT_ASSEMBLER"; then
1851 gcc_cv_as="$DEFAULT_ASSEMBLER"
1852 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
1853 && test -f ../gas/Makefile \
1854 && test x$build = x$host; then
1855 gcc_cv_as=../gas/as-new$build_exeext
1856 elif test -x as$build_exeext; then
1857 # Build using assembler in the current directory.
1858 gcc_cv_as=./as$build_exeext
1859 elif test -x $AS_FOR_TARGET; then
1860 gcc_cv_as="$AS_FOR_TARGET"
1862 AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
1865 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
1866 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
1867 case "$ORIGINAL_AS_FOR_TARGET" in
1868 ./as | ./as$build_exeext) ;;
1869 *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
1872 AC_MSG_CHECKING(what assembler to use)
1873 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
1874 # Single tree build which includes gas. We want to prefer it
1875 # over whatever linker top-level may have detected, since
1876 # we'll use what we're building after installation anyway.
1877 AC_MSG_RESULT(newly built gas)
1879 _gcc_COMPUTE_GAS_VERSION
1880 in_tree_gas_is_elf=no
1881 if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
1882 || (grep 'obj_format = multi' ../gas/Makefile \
1883 && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
1885 in_tree_gas_is_elf=yes
1888 AC_MSG_RESULT($gcc_cv_as)
1892 # Identify the linker which will work hand-in-glove with the newly
1893 # built GCC, so that we can examine its features. This is the linker
1894 # which will be driven by the driver program.
1896 # If build != host, and we aren't building gas in-tree, we identify a
1897 # build->target linker and hope that it will have the same features
1898 # as the host->target linker we'll be using.
1899 gcc_cv_gld_major_version=
1900 gcc_cv_gld_minor_version=
1901 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
1902 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
1904 AS_VAR_SET_IF(gcc_cv_ld,, [
1905 if test -x "$DEFAULT_LINKER"; then
1906 gcc_cv_ld="$DEFAULT_LINKER"
1907 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
1908 && test -f ../ld/Makefile \
1909 && test x$build = x$host; then
1910 gcc_cv_ld=../ld/ld-new$build_exeext
1911 elif test -x collect-ld$build_exeext; then
1912 # Build using linker in the current directory.
1913 gcc_cv_ld=./collect-ld$build_exeext
1914 elif test -x $LD_FOR_TARGET; then
1915 gcc_cv_ld="$LD_FOR_TARGET"
1917 AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
1920 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
1921 PLUGIN_LD=`basename $gcc_cv_ld`
1922 AC_ARG_WITH(plugin-ld,
1923 [ --with-plugin-ld=[[ARG]] specify the plugin linker],
1924 [if test x"$withval" != x; then
1925 ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
1926 PLUGIN_LD="$withval"
1928 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
1929 AC_DEFINE_UNQUOTED(PLUGIN_LD, "$PLUGIN_LD", [Specify plugin linker])
1931 # Check to see if we are using gold instead of ld
1932 AC_MSG_CHECKING(whether we are using gold)
1934 if test x$gcc_cv_ld != x; then
1935 if $gcc_cv_ld --version 2>/dev/null | sed 1q \
1936 | grep "GNU gold" > /dev/null; then
1940 AC_MSG_RESULT($ld_is_gold)
1942 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
1943 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
1944 case "$ORIGINAL_LD_FOR_TARGET" in
1945 ./collect-ld | ./collect-ld$build_exeext) ;;
1946 *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
1949 AC_MSG_CHECKING(what linker to use)
1950 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext; then
1951 # Single tree build which includes ld. We want to prefer it
1952 # over whatever linker top-level may have detected, since
1953 # we'll use what we're building after installation anyway.
1954 AC_MSG_RESULT(newly built ld)
1956 in_tree_ld_is_elf=no
1957 if (grep 'EMUL = .*elf' ../ld/Makefile \
1958 || grep 'EMUL = .*linux' ../ld/Makefile \
1959 || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
1960 in_tree_ld_is_elf=yes
1962 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
1965 gcc_cv_gld_version=`sed -n -e 's/^[ ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
1966 if test x$gcc_cv_gld_version != x; then
1970 gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
1971 gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
1974 AC_MSG_RESULT($gcc_cv_ld)
1978 # Figure out what nm we will be using.
1979 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
1980 AS_VAR_SET_IF(gcc_cv_nm,, [
1981 if test -f $gcc_cv_binutils_srcdir/configure.in \
1982 && test -f ../binutils/Makefile \
1983 && test x$build = x$host; then
1984 gcc_cv_nm=../binutils/nm-new$build_exeext
1985 elif test -x nm$build_exeext; then
1986 gcc_cv_nm=./nm$build_exeext
1987 elif test -x $NM_FOR_TARGET; then
1988 gcc_cv_nm="$NM_FOR_TARGET"
1990 AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
1993 AC_MSG_CHECKING(what nm to use)
1994 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
1995 # Single tree build which includes binutils.
1996 AC_MSG_RESULT(newly built nm)
1999 AC_MSG_RESULT($gcc_cv_nm)
2003 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2004 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2005 case "$ORIGINAL_NM_FOR_TARGET" in
2006 ./nm | ./nm$build_exeext) ;;
2007 *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2011 # Figure out what objdump we will be using.
2012 AS_VAR_SET_IF(gcc_cv_objdump,, [
2013 if test -f $gcc_cv_binutils_srcdir/configure.in \
2014 && test -f ../binutils/Makefile \
2015 && test x$build = x$host; then
2016 # Single tree build which includes binutils.
2017 gcc_cv_objdump=../binutils/objdump$build_exeext
2018 elif test -x objdump$build_exeext; then
2019 gcc_cv_objdump=./objdump$build_exeext
2020 elif test -x $OBJDUMP_FOR_TARGET; then
2021 gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2023 AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2026 AC_MSG_CHECKING(what objdump to use)
2027 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2028 # Single tree build which includes binutils.
2029 AC_MSG_RESULT(newly built objdump)
2030 elif test x$gcc_cv_objdump = x; then
2031 AC_MSG_RESULT(not found)
2033 AC_MSG_RESULT($gcc_cv_objdump)
2036 # Figure out what readelf we will be using.
2037 AS_VAR_SET_IF(gcc_cv_readelf,, [
2038 if test -f $gcc_cv_binutils_srcdir/configure.in \
2039 && test -f ../binutils/Makefile \
2040 && test x$build = x$host; then
2041 # Single tree build which includes binutils.
2042 gcc_cv_readelf=../binutils/readelf$build_exeext
2043 elif test -x readelf$build_exeext; then
2044 gcc_cv_readelf=./readelf$build_exeext
2046 AC_PATH_PROG(gcc_cv_readelf, readelf)
2049 AC_MSG_CHECKING(what readelf to use)
2050 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2051 # Single tree build which includes binutils.
2052 AC_MSG_RESULT(newly built readelf)
2053 elif test x$gcc_cv_readelf = x; then
2054 AC_MSG_RESULT(not found)
2056 AC_MSG_RESULT($gcc_cv_readelf)
2059 # Figure out what assembler alignment features are present.
2060 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2064 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2065 [Define if your assembler supports .balign and .p2align.])])
2067 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2070 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2071 [Define if your assembler supports specifying the maximum number
2072 of bytes to skip when using the GAS .p2align command.])])
2074 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2077 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2078 [Define if your assembler supports .literal16.])])
2080 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2082 [conftest_label1: .word 0
2084 conftest_label2: .word 0
2086 [if test x$gcc_cv_nm != x; then
2087 $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2088 $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2089 if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2091 else gcc_cv_as_subsection_m1=yes
2093 rm -f conftest.nm1 conftest.nm2
2095 [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2096 [Define if your assembler supports .subsection and .subsection -1 starts
2097 emitting at the beginning of your section.])])
2099 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2102 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2104 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2106 [ .weakref foobar, barfnot],,
2107 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2109 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2112 .NSUBSPA $CODE$,COMDAT],,
2113 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2115 # .hidden needs to be supported in both the assembler and the linker,
2116 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2117 # This is irritatingly difficult to feature test for; we have to check the
2118 # date string after the version number. If we've got an in-tree
2119 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2121 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2122 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2126 # Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with
2127 # STV_HIDDEN, so disable .hidden support if so.
2130 if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then
2131 cat > conftest.s <<EOF
2138 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
2139 && $gcc_cv_objdump -t conftest.o 2>/dev/null | \
2140 grep '\.hidden default' > /dev/null; then
2143 gcc_cv_as_hidden=yes
2146 # Assume bug is present if objdump is missing.
2151 gcc_cv_as_hidden=yes
2155 # gnu_indirect_function type is an extension proposed at
2156 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2157 # selection of function implementation
2158 AC_ARG_ENABLE(gnu-indirect-function,
2159 [AS_HELP_STRING([--enable-gnu-indirect-function],
2160 [enable the use of the @gnu_indirect_function to glibc systems])],
2161 [case $enable_gnu_indirect_function in
2163 *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2164 Valid choices are 'yes' and 'no'.]) ;;
2166 [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2167 if test x$enable_gnu_indirect_function = xyes; then
2168 AC_DEFINE(HAVE_GNU_INDIRECT_FUNCTION, 1,
2169 [Define if your system supports gnu indirect functions.])
2173 if test $in_tree_ld != yes ; then
2174 ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2175 if test x"$ld_is_gold" = xyes; then
2176 gcc_cv_ld_hidden=yes
2177 elif echo "$ld_ver" | grep GNU > /dev/null; then
2178 ld_vers=`echo $ld_ver | sed -n \
2179 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2180 ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2181 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2182 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2183 ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2188 # Solaris 2 ld -V output looks like this for a regular version:
2190 # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
2192 # but test versions add stuff at the end:
2194 # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
2196 ld_ver=`$gcc_cv_ld -V 2>&1`
2197 if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2198 ld_vers=`echo $ld_ver | sed -n \
2199 -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2200 ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2201 ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2209 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2210 [[if test $in_tree_ld = yes ; then
2212 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2213 && test $in_tree_ld_is_elf = yes; then
2214 gcc_cv_ld_hidden=yes
2217 gcc_cv_ld_hidden=yes
2218 if echo "$ld_ver" | grep GNU > /dev/null; then
2219 if test 0"$ld_date" -lt 20020404; then
2220 if test -n "$ld_date"; then
2221 # If there was date string, but was earlier than 2002-04-04, fail
2223 elif test -z "$ld_vers"; then
2224 # If there was no date string nor ld version number, something is wrong
2227 test -z "$ld_vers_patch" && ld_vers_patch=0
2228 if test "$ld_vers_major" -lt 2; then
2230 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2231 gcc_cv_ld_hidden="no"
2232 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2239 hppa64*-*-hpux* | ia64*-*-hpux*)
2240 gcc_cv_ld_hidden=yes
2243 # .hidden support was backported to Solaris 8, starting with ld
2245 if test "$ld_vers_minor" -ge 276; then
2246 gcc_cv_ld_hidden=yes
2251 *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
2252 # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2253 # .symbolic was only added in Solaris 9 12/02.
2254 gcc_cv_ld_hidden=yes
2262 libgcc_visibility=no
2263 AC_SUBST(libgcc_visibility)
2264 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2265 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2266 libgcc_visibility=yes
2267 AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2268 [Define if your assembler and linker support .hidden.])
2271 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2272 gcc_cv_ld_ro_rw_mix=unknown
2273 if test $in_tree_ld = yes ; then
2274 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2275 && test $in_tree_ld_is_elf = yes; then
2276 gcc_cv_ld_ro_rw_mix=read-write
2278 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2279 echo '.section myfoosect, "a"' > conftest1.s
2280 echo '.section myfoosect, "aw"' > conftest2.s
2281 echo '.byte 1' >> conftest2.s
2282 echo '.section myfoosect, "a"' > conftest3.s
2283 echo '.byte 0' >> conftest3.s
2284 if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2285 && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2286 && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2287 && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2288 conftest2.o conftest3.o > /dev/null 2>&1; then
2289 gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2290 | sed -e '/myfoosect/!d' -e N`
2291 if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2292 if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2293 gcc_cv_ld_ro_rw_mix=read-only
2295 gcc_cv_ld_ro_rw_mix=read-write
2300 rm -f conftest.* conftest[123].*
2303 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2304 AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2305 [Define if your linker links a mix of read-only
2306 and read-write sections into a read-write section.])
2308 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2310 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2311 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2319 [[# GAS versions before 2.11 do not support uleb128,
2320 # despite appearing to.
2321 # ??? There exists an elf-specific test that will crash
2322 # the assembler. Perhaps it's better to figure out whether
2323 # arbitrary sections are supported and try the test.
2324 as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2325 if echo "$as_ver" | grep GNU > /dev/null; then
2326 as_vers=`echo $as_ver | sed -n \
2327 -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2328 as_major=`expr "$as_vers" : '\([0-9]*\)'`
2329 as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2330 if test $as_major -eq 2 && test $as_minor -lt 11
2332 else gcc_cv_as_leb128=yes
2335 [AC_DEFINE(HAVE_AS_LEB128, 1,
2336 [Define if your assembler supports .sleb128 and .uleb128.])])
2338 # Check if we have assembler support for unwind directives.
2339 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2346 .cfi_escape 1, 2, 3, 4, 5
2350 # If the linker used on Solaris (like Sun ld) isn't capable of merging
2351 # read-only and read-write sections, we need to make sure that the
2352 # assembler used emits read-write .eh_frame sections.
2353 if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2354 if test "x$gcc_cv_objdump" != x; then
2355 if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2356 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2357 gcc_cv_as_cfi_directive=no
2360 i?86-*-solaris2.1[[0-9]]*)
2361 # On Solaris/x86, make sure that GCC and gas agree on using
2362 # read-only .eh_frame sections for 64-bit.
2363 if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
2364 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2365 sed -e /.eh_frame/!d -e N | \
2366 grep READONLY > /dev/null; then
2367 gcc_cv_as_cfi_directive=yes
2369 gcc_cv_as_cfi_directive=no
2373 gcc_cv_as_cfi_directive=yes
2378 # no objdump, err on the side of caution
2379 gcc_cv_as_cfi_directive=no
2382 gcc_cv_as_cfi_directive=yes
2386 gcc_cv_as_cfi_directive=yes
2389 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2390 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2394 .cfi_adjust_cfa_offset 64
2396 .cfi_adjust_cfa_offset 128
2399 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2400 | grep 'DW_CFA_advance_loc[24]:[ ][ ]*75040[ ]' >/dev/null; then
2401 gcc_cv_as_cfi_advance_working=yes
2405 # no objdump, err on the side of caution
2406 gcc_cv_as_cfi_advance_working=no
2408 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2409 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2410 [`if test $gcc_cv_as_cfi_directive = yes \
2411 && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2412 [Define 0/1 if your assembler supports CFI directives.])
2414 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2415 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2416 gcc_cv_as_cfi_personality_directive, ,,
2419 .cfi_personality 0, symbol
2421 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2422 [`if test $gcc_cv_as_cfi_personality_directive = yes;
2423 then echo 1; else echo 0; fi`],
2424 [Define 0/1 if your assembler supports .cfi_personality.])
2426 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2427 gcc_cv_as_cfi_sections_directive, ,,
2429 .cfi_sections .debug_frame, .eh_frame
2433 win32 | pe | cygwin* | mingw32* | uwin*)
2434 # Need to check that we generated the correct relocation for the
2435 # .debug_frame section. This was fixed for binutils 2.21.
2436 gcc_cv_as_cfi_sections_directive=no
2437 if test "x$gcc_cv_objdump" != x; then
2438 if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2439 grep secrel > /dev/null; then
2440 gcc_cv_as_cfi_sections_directive=yes
2445 gcc_cv_as_cfi_sections_directive=yes
2448 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2449 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2450 [`if test $gcc_cv_as_cfi_sections_directive = yes;
2451 then echo 1; else echo 0; fi`],
2452 [Define 0/1 if your assembler supports .cfi_sections.])
2454 # GAS versions up to and including 2.11.0 may mis-optimize
2456 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2464 .section .eh_frame,"aw",@progbits
2466 .4byte .LECIE1-.LSCIE1
2480 .4byte .LEFDE1-.LASFDE1
2482 .4byte .LASFDE1-__FRAME_BEGIN__
2490 [ dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2491 cat > conftest.lit <<EOF
2492 0000 10000000 00000000 017a0001 781a0004 .........z..x...
2493 0010 01000000 12000000 18000000 00000000 ................
2494 0020 08000000 04080000 0044 .........D @&t@
2496 cat > conftest.big <<EOF
2497 0000 00000010 00000000 017a0001 781a0004 .........z..x...
2498 0010 00000001 00000012 00000018 00000000 ................
2499 0020 00000008 04000000 0844 .........D @&t@
2501 # If the assembler didn't choke, and we can objdump,
2502 # and we got the correct data, then succeed.
2503 # The text in the here-document typically retains its unix-style line
2504 # endings, while the output of objdump will use host line endings.
2505 # Therefore, use diff -b for the comparisons.
2506 if test x$gcc_cv_objdump != x \
2507 && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2508 | tail -3 > conftest.got \
2509 && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2510 || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2512 gcc_cv_as_eh_frame=yes
2513 elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2514 gcc_cv_as_eh_frame=buggy
2516 # Uh oh, what do we do now?
2517 gcc_cv_as_eh_frame=no
2520 if test $gcc_cv_as_eh_frame = buggy; then
2521 AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2522 [Define if your assembler mis-optimizes .eh_frame data.])
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])
2528 if test $gcc_cv_as_shf_merge = no; then
2529 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2530 [elf,2,12,0], [--fatal-warnings],
2531 [.section .rodata.str, "aMS", %progbits, 1])
2533 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2534 [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2535 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2537 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group,
2538 [elf,2,16,0], [--fatal-warnings],
2539 [.section .text,"axG",@progbits,.foo,comdat])
2540 if test $gcc_cv_as_comdat_group = yes; then
2541 gcc_cv_as_comdat_group_percent=no
2543 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group_percent,
2544 [elf,2,16,0], [--fatal-warnings],
2545 [.section .text,"axG",%progbits,.foo,comdat])
2547 if test x"$ld_is_gold" = xyes; then
2549 elif test $in_tree_ld = yes ; then
2551 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2552 && test $in_tree_ld_is_elf = yes; then
2555 elif echo "$ld_ver" | grep GNU > /dev/null; then
2557 if test 0"$ld_date" -lt 20050308; then
2558 if test -n "$ld_date"; then
2559 # If there was date string, but was earlier than 2005-03-08, fail
2561 elif test "$ld_vers_major" -lt 2; then
2563 elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2570 *-*-solaris2.1[1-9]*)
2571 # Sun ld has COMDAT group support since Solaris 9, but it doesn't
2572 # interoperate with GNU as until Solaris 11 build 130, i.e. ld
2575 # FIXME: Maybe need to refine later when COMDAT group support with
2576 # Sun as is implemented.
2577 if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 1688; then
2584 # Assume linkers other than GNU ld don't support COMDAT group.
2590 # Allow overriding the automatic COMDAT group tests above.
2591 AC_ARG_ENABLE(comdat,
2592 [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
2593 [comdat_group="$enable_comdat"])
2594 if test $comdat_group = no; then
2595 gcc_cv_as_comdat_group=no
2596 gcc_cv_as_comdat_group_percent=no
2598 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2599 [`if test $gcc_cv_as_comdat_group = yes || test $gcc_cv_as_comdat_group_percent = yes; then echo 1; else echo 0; fi`],
2600 [Define 0/1 if your assembler and linker support COMDAT groups.])
2602 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2603 gcc_cv_as_discriminator,
2607 .loc 1 1 0 discriminator 1],,
2608 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2609 [Define if your assembler supports the .loc discriminator sub-directive.])])
2611 # Thread-local storage - the check is heavily parameterized.
2620 .section ".tdata","awT",@progbits
2623 ldq $27,__tls_get_addr($29) !literal!1
2624 lda $16,foo($29) !tlsgd!1
2625 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
2626 ldq $27,__tls_get_addr($29) !literal!2
2627 lda $16,foo($29) !tlsldm!2
2628 jsr $26,($27),__tls_get_addr !lituse_tlsldm!2
2629 ldq $1,foo($29) !gotdtprel
2630 ldah $2,foo($29) !dtprelhi
2631 lda $3,foo($2) !dtprello
2632 lda $4,foo($29) !dtprel
2633 ldq $1,foo($29) !gottprel
2634 ldah $2,foo($29) !tprelhi
2635 lda $3,foo($2) !tprello
2636 lda $4,foo($29) !tprel'
2639 tls_as_opt=--fatal-warnings
2641 cris-*-*|crisv32-*-*)
2643 .section ".tdata","awT",@progbits
2650 tls_as_opt=--fatal-warnings
2654 .section ".tdata","awT",@progbits
2666 .section ".tdata","awT",@progbits
2670 addil LT%foo-$tls_gdidx$,gp
2671 ldo RT%foo-$tls_gdidx$(%r1),%arg0
2674 addil LT%foo-$tls_ldidx$,gp
2676 ldo RT%foo-$tls_ldidx$(%r1),%arg0
2677 addil LR%foo-$tls_dtpoff$,%ret0
2678 ldo RR%foo-$tls_dtpoff$(%r1),%t1
2680 addil LT%foo-$tls_ieoff$,gp
2681 ldw RT%foo-$tls_ieoff$(%r1),%t2
2684 addil LR%foo-$tls_leoff$,%t1
2685 ldo RR%foo-$tls_leoff$(%r1),%t2'
2688 tls_as_opt=--fatal-warnings
2692 .section ".tdata","awT",%progbits
2705 i[34567]86-*-solaris2.*)
2707 tga_func=___tls_get_addr
2713 if test x$on_solaris = xyes && test x$gas_flag = xno; then
2715 .section .tdata,"awt",@progbits'
2719 AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
2720 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
2724 .section ".tdata","awT",@progbits'
2727 tls_as_opt="--fatal-warnings"
2729 conftest_s="$conftest_s
2733 leal foo@tlsgd(,%ebx,1), %eax
2734 leal foo@tlsldm(%ebx), %eax
2735 leal foo@dtpoff(%eax), %edx
2736 movl foo@gottpoff(%ebx), %eax
2737 subl foo@gottpoff(%ebx), %eax
2738 addl foo@gotntpoff(%ebx), %eax
2739 movl foo@indntpoff, %eax
2740 movl \$foo@tpoff, %eax
2741 subl \$foo@tpoff, %eax
2742 leal foo@ntpoff(%ecx), %eax"
2746 .section ".tdata","awT",@progbits
2750 leaq foo@TLSGD(%rip), %rdi
2751 leaq foo@TLSLD(%rip), %rdi
2752 leaq foo@DTPOFF(%rax), %rdx
2753 movq foo@GOTTPOFF(%rip), %rax
2754 movq $foo@TPOFF, %rax'
2757 tls_as_opt=--fatal-warnings
2761 .section ".tdata","awT",@progbits
2764 addl r16 = @ltoff(@dtpmod(foo#)), gp
2765 addl r17 = @ltoff(@dtprel(foo#)), gp
2766 addl r18 = @ltoff(@tprel(foo#)), gp
2767 addl r19 = @dtprel(foo#), gp
2768 adds r21 = @dtprel(foo#), r13
2769 movl r23 = @dtprel(foo#)
2770 addl r20 = @tprel(foo#), gp
2771 adds r22 = @tprel(foo#), r13
2772 movl r24 = @tprel(foo#)'
2775 tls_as_opt=--fatal-warnings
2779 .section .tdata,"awT",@progbits
2783 addiu $4, $28, %tlsgd(x)
2784 addiu $4, $28, %tlsldm(x)
2785 lui $4, %dtprel_hi(x)
2786 addiu $4, $4, %dtprel_lo(x)
2787 lw $4, %gottprel(x)($28)
2788 lui $4, %tprel_hi(x)
2789 addiu $4, $4, %tprel_lo(x)'
2792 tls_as_opt='-32 --fatal-warnings'
2796 .section .tdata,"awT",@progbits
2801 move.l x@TLSGD(%a5),%a0
2802 move.l x@TLSLDM(%a5),%a0
2803 move.l x@TLSLDO(%a5),%a0
2804 move.l x@TLSIE(%a5),%a0
2805 move.l x@TLSLE(%a5),%a0'
2808 tls_as_opt='--fatal-warnings'
2812 .section ".tdata","awT",@progbits
2820 addi 3,31,ld0@got@tlsgd
2822 addi 3,31,x1@got@tlsld
2825 addis 9,3,x2@dtprel@ha
2826 addi 9,9,x2@dtprel@l
2827 lwz 9,x3@got@tprel(31)
2830 addis 9,2,x2@tprel@ha
2831 addi 9,9,x2@tprel@l'
2834 tls_as_opt="-a32 --fatal-warnings"
2838 .section ".tdata","awT",@progbits
2846 addi 3,2,ld0@got@tlsgd
2852 addi 3,2,x1@got@tlsld
2858 addis 9,3,x2@dtprel@ha
2859 addi 9,9,x2@dtprel@l
2862 ld 9,x3@got@dtprel(2)
2868 tls_as_opt="-a64 --fatal-warnings"
2872 .section ".tdata","awT",@progbits
2881 l %r1,foo@GOTNTPOFF(%r12)
2882 l %r1,0(%r1):tls_load:foo
2883 bas %r14,0(%r1,%r13):tls_gdcall:foo
2884 bas %r14,0(%r1,%r13):tls_ldcall:foo'
2887 tls_as_opt="-m31 --fatal-warnings"
2891 .section ".tdata","awT",@progbits
2899 lg %r1,foo@GOTNTPOFF(%r12)
2900 larl %r1,foo@INDNTPOFF
2901 brasl %r14,__tls_get_offset@PLT:tls_gdcall:foo
2902 brasl %r14,__tls_get_offset@PLT:tls_ldcall:foo'
2905 tls_as_opt="-m64 -Aesame --fatal-warnings"
2907 sh-*-* | sh[34]-*-*)
2909 .section ".tdata","awT",@progbits
2919 tls_as_opt=--fatal-warnings
2923 sparc*-sun-solaris2.*)
2925 tga_func=__tls_get_addr
2931 if test x$on_solaris = xyes && test x$gas_flag = xno; then
2933 .section ".tdata",#alloc,#write,#tls'
2938 .section ".tdata","awT",@progbits'
2941 tls_as_opt="-32 --fatal-warnings"
2943 conftest_s="$conftest_s
2946 sethi %tgd_hi22(foo), %o0
2947 add %o0, %tgd_lo10(foo), %o1
2948 add %l7, %o1, %o0, %tgd_add(foo)
2949 call __tls_get_addr, %tgd_call(foo)
2950 sethi %tldm_hi22(foo), %l1
2951 add %l1, %tldm_lo10(foo), %l2
2952 add %l7, %l2, %o0, %tldm_add(foo)
2953 call __tls_get_addr, %tldm_call(foo)
2954 sethi %tldo_hix22(foo), %l3
2955 xor %l3, %tldo_lox10(foo), %l4
2956 add %o0, %l4, %l5, %tldo_add(foo)
2957 sethi %tie_hi22(foo), %o3
2958 add %o3, %tie_lo10(foo), %o3
2959 ld [%l7 + %o3], %o2, %tie_ld(foo)
2960 add %g7, %o2, %o4, %tie_add(foo)
2961 sethi %tle_hix22(foo), %l1
2962 xor %l1, %tle_lox10(foo), %o5
2963 ld [%g7 + %o5], %o1"
2967 .section ".tdata","awT",@progbits
2970 movi a8, foo@TLSFUNC
2971 movi a10, foo@TLSARG
2972 callx8.tls a8, foo@TLSCALL'
2979 if test "x$enable_tls" = xno ; then
2980 : # TLS explicitly disabled.
2981 elif test "x$enable_tls" = xyes ; then
2982 set_have_as_tls=yes # TLS explicitly enabled.
2983 elif test -z "$tls_first_major"; then
2984 : # If we don't have a check, assume no support.
2986 gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
2987 [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
2988 [set_have_as_tls=yes])
2991 # TLS was introduced in the Solaris 9 FCS release and backported to
2992 # Solaris 8 patches. Support for GNU-style TLS on x86 was only
2993 # introduced in Solaris 9 4/04, replacing the earlier Sun style that Sun
2994 # ld and GCC don't support any longer.
2996 AC_MSG_CHECKING(linker and ld.so.1 TLS support)
2998 # Check ld and ld.so.1 TLS support.
2999 if echo "$ld_ver" | grep GNU > /dev/null; then
3000 # Assume all interesting versions of GNU ld have TLS support.
3001 # FIXME: still need ld.so.1 support, i.e. ld version checks below.
3005 # Solaris 8/x86 ld has GNU style TLS support since version 1.280.
3007 min_tls_ld_vers_minor=280
3009 # Solaris 8/SPARC ld has TLS support since version 1.272.
3010 sparc*-*-solaris2.8)
3011 min_tls_ld_vers_minor=272
3013 # Solaris 9/x86 ld has GNU style TLS support since version 1.374.
3015 min_tls_ld_vers_minor=374
3017 # Solaris 9/SPARC and Solaris 10+ ld have TLS support since FCS.
3018 sparc*-*-solaris2.9 | *-*-solaris2.1[[0-9]]*)
3019 min_tls_ld_vers_minor=343
3022 if test "$ld_vers_major" -gt 1 || \
3023 test "$ld_vers_minor" -ge "$min_tls_ld_vers_minor"; then
3029 AC_MSG_RESULT($ld_tls_support)
3032 save_LDFLAGS="$LDFLAGS"
3036 AC_MSG_CHECKING(alternate thread library)
3038 # TLS support was backported to Solaris 8 patches, but only lives in
3039 # the alternate thread library which became the default in Solaris 9.
3040 # We want to always use that, irrespective of TLS support.
3042 # Take multilib subdir into account. There's no spec to handle
3043 # this. The 64 symlink exists since Solaris 8.
3044 lwp_dir=/usr/lib/lwp
3045 lwp_spec="-L$lwp_dir%{m64:/64} -R$lwp_dir%{m64:/64}"
3046 LDFLAGS="-L$lwp_dir -R$lwp_dir"
3053 # Always define LIB_THREAD_LDFLAGS_SPEC, even without TLS support.
3054 AC_DEFINE_UNQUOTED(LIB_THREAD_LDFLAGS_SPEC, "$lwp_spec",
3055 [Define to the linker flags to use for -pthread.])
3056 AC_MSG_RESULT($lwp_dir)
3058 AC_MSG_CHECKING(library containing $tga_func)
3059 # Before Solaris 10, __tls_get_addr (SPARC/x64) resp. ___tls_get_addr
3060 # (32-bit x86) only lived in libthread, so check for that. Keep
3061 # set_have_as_tls if found, disable if not.
3062 AC_SEARCH_LIBS([$tga_func], [thread],, [set_have_as_tls=no])
3063 # Clear LIBS if we cannot support TLS.
3064 if test $set_have_as_tls = no; then
3067 # Always define LIB_TLS_SPEC, even without TLS support.
3068 AC_DEFINE_UNQUOTED(LIB_TLS_SPEC, "$LIBS",
3069 [Define to the library containing __tls_get_addr/___tls_get_addr.])
3070 AC_MSG_RESULT($LIBS)
3073 LDFLAGS="$save_LDFLAGS"
3076 if test $set_have_as_tls = yes ; then
3077 AC_DEFINE(HAVE_AS_TLS, 1,
3078 [Define if your assembler and linker support thread-local storage.])
3081 # Target-specific assembler checks.
3083 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3084 gcc_cv_ld_static_dynamic=no
3085 if test $in_tree_ld = yes ; then
3086 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3087 gcc_cv_ld_static_dynamic=yes
3089 elif test x$gcc_cv_ld != x; then
3090 # Check if linker supports -Bstatic/-Bdynamic option
3091 if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3092 && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3093 gcc_cv_ld_static_dynamic=yes
3096 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3097 AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3098 [Define if your linker supports -Bstatic/-Bdynamic option.])
3100 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3102 if test x"$demangler_in_ld" = xyes; then
3103 AC_MSG_CHECKING(linker --demangle support)
3104 gcc_cv_ld_demangle=no
3105 if test $in_tree_ld = yes; then
3106 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3107 gcc_cv_ld_demangle=yes
3109 elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3110 # Check if the GNU linker supports --demangle option
3111 if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3112 gcc_cv_ld_demangle=yes
3115 if test x"$gcc_cv_ld_demangle" = xyes; then
3116 AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3117 [Define if your linker supports --demangle option.])
3119 AC_MSG_RESULT($gcc_cv_ld_demangle)
3123 # All TARGET_ABI_OSF targets.
3124 alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
3125 gcc_GAS_CHECK_FEATURE([explicit relocation support],
3126 gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3129 extbl $3, $2, $3 !lituse_bytoff!1
3130 ldq $2, a($29) !literal!1
3131 ldq $4, b($29) !literal!2
3132 ldq_u $3, 0($2) !lituse_base!1
3133 ldq $27, f($29) !literal!5
3134 jsr $26, ($27), f !lituse_jsr!5
3135 ldah $29, 0($26) !gpdisp!3
3136 lda $0, c($29) !gprel
3137 ldah $1, d($29) !gprelhigh
3138 lda $1, d($1) !gprellow
3139 lda $29, 0($29) !gpdisp!3],,
3140 [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3141 [Define if your assembler supports explicit relocations.])])
3142 gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3143 gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3146 ldq $27, a($29) !literal!1
3147 jsr $26, ($27), a !lituse_jsrdirect!1],,
3148 [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3149 [Define if your assembler supports the lituse_jsrdirect relocation.])])
3153 gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3154 gcc_cv_as_cris_no_mul_bug,[2,15,91],
3155 [-no-mul-bug-abort], [.text],,
3156 [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3157 [Define if your assembler supports the -no-mul-bug-abort option.])])
3161 gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3162 [.register %g2, #scratch],,
3163 [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3164 [Define if your assembler supports .register.])])
3166 gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3168 [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3169 [Define if your assembler supports -relax option.])])
3171 gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3172 gcc_cv_as_sparc_gotdata_op,,
3178 sethi %gdop_hix22(foo), %g1
3179 xor %g1, %gdop_lox10(foo), %g1
3180 ld [[%l7 + %g1]], %g2, %gdop(foo)],
3181 [if test x$gcc_cv_ld != x \
3182 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3183 if $gcc_cv_ld -v | grep GNU >/dev/null 2>&1; then
3184 if test x$gcc_cv_objdump != x; then
3185 if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3186 | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3187 gcc_cv_as_sparc_gotdata_op=no
3189 gcc_cv_as_sparc_gotdata_op=yes
3193 gcc_cv_as_sparc_gotdata_op=yes
3197 [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3198 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3200 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3201 gcc_cv_as_sparc_ua_pcrel,,
3209 .uaword %r_disp32(foo)],
3210 [if test x$gcc_cv_ld != x \
3211 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3212 gcc_cv_as_sparc_ua_pcrel=yes
3215 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3216 [Define if your assembler and linker support unaligned PC relative relocs.])
3218 gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3219 gcc_cv_as_sparc_ua_pcrel_hidden,,
3224 .uaword %r_disp32(foo)
3225 .byte 0x32, 0x33, 0x34
3230 [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3231 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3232 && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3233 | grep ' 31000000 07323334' > /dev/null 2>&1; then
3234 if $gcc_cv_objdump -R conftest 2> /dev/null \
3235 | grep 'DISP32' > /dev/null 2>&1; then
3238 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3242 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3243 [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3244 ]) # unaligned pcrel relocs
3246 gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3247 gcc_cv_as_sparc_offsetable_lo10,,
3250 or %g1, %lo(ab) + 12, %g1
3251 or %g1, %lo(ab + 12), %g1],
3252 [if test x$gcc_cv_objdump != x \
3253 && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3254 | grep ' 82106000 82106000' > /dev/null 2>&1; then
3255 gcc_cv_as_sparc_offsetable_lo10=yes
3257 [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3258 [Define if your assembler supports offsetable %lo().])])
3262 i[34567]86-*-* | x86_64-*-*)
3266 # Full C++ conformance when using a shared libstdc++-v3 requires some
3267 # support from the Cygwin DLL, which in more recent versions exports
3268 # wrappers to aid in interposing and redirecting operators new, delete,
3269 # etc., as per n2800 #17.6.4.6 [replacement.functions]. Check if we
3270 # are configuring for a version of Cygwin that exports the wrappers.
3271 if test x$host = x$target; then
3272 AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3274 # Can't check presence of libc functions during cross-compile, so
3275 # we just have to assume we're building for an up-to-date target.
3276 gcc_ac_cygwin_dll_wrappers=yes
3278 AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3279 [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3280 [Define if you want to generate code by default that assumes that the
3281 Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3284 cygwin* | pe | mingw32*)
3285 # Recent binutils allows the three-operand form of ".comm" on PE. This
3286 # definition is used unconditionally to initialise the default state of
3287 # the target option variable that governs usage of the feature.
3288 gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3289 [2,19,52],,[.comm foo,1,32])
3290 AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3291 [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3292 [Define if your assembler supports specifying the alignment
3293 of objects allocated using the GAS .comm command.])
3294 # Used for DWARF 2 in PE
3295 gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3296 gcc_cv_as_ix86_pe_secrel32,
3302 [if test x$gcc_cv_ld != x \
3303 && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3304 gcc_cv_as_ix86_pe_secrel32=yes
3307 [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3308 [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3309 # Test if the assembler supports the extended form of the .section
3310 # directive that specifies section alignment. LTO support uses this,
3311 # but normally only after installation, so we warn but don't fail the
3312 # configure if LTO is enabled but the assembler does not support it.
3313 gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
3314 [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
3315 if test x$gcc_cv_as_section_has_align != xyes; then
3316 case ",$enable_languages," in
3318 AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
3325 gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3326 gcc_cv_as_ix86_filds,,,
3327 [filds mem; fists mem],,
3328 [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3329 [Define if your assembler uses filds and fists mnemonics.])])
3331 gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3332 gcc_cv_as_ix86_fildq,,,
3333 [fildq mem; fistpq mem],,
3334 [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3335 [Define if your assembler uses fildq and fistq mnemonics.])])
3337 gcc_GAS_CHECK_FEATURE([cmov syntax],
3338 gcc_cv_as_ix86_cmov_sun_syntax,,,
3339 [cmovl.l %edx, %eax],,
3340 [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3341 [Define if your assembler supports the Sun syntax for cmov.])])
3343 gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3344 gcc_cv_as_ix86_ffreep,,,
3346 [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3347 [Define if your assembler supports the ffreep mnemonic.])])
3349 gcc_GAS_CHECK_FEATURE([.quad directive],
3350 gcc_cv_as_ix86_quad,,,
3352 [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
3353 [Define if your assembler supports the .quad directive.])])
3355 gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3356 gcc_cv_as_ix86_sahf,,,
3359 [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3360 [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
3362 gcc_GAS_CHECK_FEATURE([swap suffix],
3363 gcc_cv_as_ix86_swap,,,
3364 [movl.s %esp, %ebp],,
3365 [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3366 [Define if your assembler supports the swap suffix.])])
3368 gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3369 gcc_cv_as_ix86_diff_sect_delta,,,
3377 [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3378 [Define if your assembler supports the subtraction of symbols in different sections.])])
3380 # These two are used unconditionally by i386.[ch]; it is to be defined
3381 # to 1 if the feature is present, 0 otherwise.
3382 gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3383 gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
3389 AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3390 [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3391 [Define true if the assembler supports '.long foo@GOTOFF'.])
3393 gcc_GAS_CHECK_FEATURE([rep and lock prefix],
3394 gcc_cv_as_ix86_rep_lock_prefix,,,
3396 lock addl %edi, (%eax,%esi)
3397 lock orl $0, (%esp)],,
3398 [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
3399 [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
3404 gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3405 gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3407 addl r15 = @ltoffx(x#), gp
3409 ld8.mov r16 = [[r15]], x#],,
3410 [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3411 [Define if your assembler supports ltoffx and ldxmov relocations.])])
3417 *-*-aix*) conftest_s=' .machine "pwr5"
3421 gcc_GAS_CHECK_FEATURE([.machine directive support],
3422 gcc_cv_as_machine_directive,,,
3423 [ .machine ppc7400])
3424 if test x$gcc_cv_as_machine_directive != xyes; then
3425 echo "*** This target requires an assembler supporting \".machine\"" >&2
3426 echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
3427 test x$build = x$target && exit 1
3431 *) conftest_s=' .machine power4
3436 gcc_GAS_CHECK_FEATURE([mfcr field support],
3437 gcc_cv_as_powerpc_mfcrf, [2,14,0],,
3439 [AC_DEFINE(HAVE_AS_MFCRF, 1,
3440 [Define if your assembler supports mfcr field.])])
3443 *-*-aix*) conftest_s=' .machine "pwr5"
3446 *) conftest_s=' .machine power5
3451 gcc_GAS_CHECK_FEATURE([popcntb support],
3452 gcc_cv_as_powerpc_popcntb, [2,17,0],,
3454 [AC_DEFINE(HAVE_AS_POPCNTB, 1,
3455 [Define if your assembler supports popcntb field.])])
3458 *-*-aix*) conftest_s=' .machine "pwr5x"
3461 *) conftest_s=' .machine power5
3466 gcc_GAS_CHECK_FEATURE([fp round support],
3467 gcc_cv_as_powerpc_fprnd, [2,17,0],,
3469 [AC_DEFINE(HAVE_AS_FPRND, 1,
3470 [Define if your assembler supports fprnd.])])
3473 *-*-aix*) conftest_s=' .machine "pwr6"
3476 *) conftest_s=' .machine power6
3481 gcc_GAS_CHECK_FEATURE([move fp gpr support],
3482 gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
3484 [AC_DEFINE(HAVE_AS_MFPGPR, 1,
3485 [Define if your assembler supports mffgpr and mftgpr.])])
3488 *-*-aix*) conftest_s=' .csect .text[[PR]]
3490 addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
3494 addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
3495 *) conftest_s=' .text
3497 addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
3500 gcc_GAS_CHECK_FEATURE([rel16 relocs],
3501 gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
3503 [AC_DEFINE(HAVE_AS_REL16, 1,
3504 [Define if your assembler supports R_PPC_REL16 relocs.])])
3507 *-*-aix*) conftest_s=' .machine "pwr6"
3510 *) conftest_s=' .machine power6
3515 gcc_GAS_CHECK_FEATURE([compare bytes support],
3516 gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
3518 [AC_DEFINE(HAVE_AS_CMPB, 1,
3519 [Define if your assembler supports cmpb.])])
3522 *-*-aix*) conftest_s=' .machine "pwr6"
3525 *) conftest_s=' .machine power6
3530 gcc_GAS_CHECK_FEATURE([decimal float support],
3531 gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
3533 [AC_DEFINE(HAVE_AS_DFP, 1,
3534 [Define if your assembler supports DFP instructions.])])
3537 *-*-aix*) conftest_s=' .machine "pwr7"
3540 *) conftest_s=' .machine power7
3545 gcc_GAS_CHECK_FEATURE([vector-scalar support],
3546 gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
3548 [AC_DEFINE(HAVE_AS_VSX, 1,
3549 [Define if your assembler supports VSX instructions.])])
3552 *-*-aix*) conftest_s=' .machine "pwr7"
3555 *) conftest_s=' .machine power7
3560 gcc_GAS_CHECK_FEATURE([popcntd support],
3561 gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
3563 [AC_DEFINE(HAVE_AS_POPCNTD, 1,
3564 [Define if your assembler supports POPCNTD instructions.])])
3567 *-*-aix*) conftest_s=' .csect .text[[PR]]
3569 *) conftest_s=' .text
3573 gcc_GAS_CHECK_FEATURE([lwsync support],
3574 gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
3576 [AC_DEFINE(HAVE_AS_LWSYNC, 1,
3577 [Define if your assembler supports LWSYNC instructions.])])
3580 *-*-aix*) conftest_s=' .machine "476"
3583 *) conftest_s=' .machine "476"
3588 gcc_GAS_CHECK_FEATURE([data cache invalidate support],
3589 gcc_cv_as_powerpc_dci, [9,99,0], -a32,
3591 [AC_DEFINE(HAVE_AS_DCI, 1,
3592 [Define if your assembler supports the DCI/ICI instructions.])])
3594 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3595 gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
3596 [.gnu_attribute 4,1],,
3597 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3598 [Define if your assembler supports .gnu_attribute.])])
3600 gcc_GAS_CHECK_FEATURE([tls marker support],
3601 gcc_cv_as_powerpc_tls_markers, [2,20,0],,
3602 [ bl __tls_get_addr(x@tlsgd)],,
3603 [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
3604 [Define if your assembler supports arg info for __tls_get_addr.])])
3608 gcc_GAS_CHECK_FEATURE([.ref support],
3609 gcc_cv_as_aix_ref, [2.21.0],,
3610 [ .csect stuff[[rw]]
3616 [AC_DEFINE(HAVE_AS_REF, 1,
3617 [Define if your assembler supports .ref])])
3623 gcc_GAS_CHECK_FEATURE([explicit relocation support],
3624 gcc_cv_as_mips_explicit_relocs, [2,14,0],,
3625 [ lw $4,%gp_rel(foo)($4)],,
3626 [if test x$target_cpu_default = x
3627 then target_cpu_default=MASK_EXPLICIT_RELOCS
3628 else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
3630 gcc_GAS_CHECK_FEATURE([-mno-shared support],
3631 gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
3632 [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
3633 [Define if the assembler understands -mno-shared.])])
3635 gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3636 gcc_cv_as_mips_gnu_attribute, [2,18,0],,
3637 [.gnu_attribute 4,1],,
3638 [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3639 [Define if your assembler supports .gnu_attribute.])])
3641 gcc_GAS_CHECK_FEATURE([.dtprelword support],
3642 gcc_cv_as_mips_dtprelword, [2,18,0],,
3643 [.section .tdata,"awT",@progbits
3647 .dtprelword x+0x8000],,
3648 [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
3649 [Define if your assembler supports .dtprelword.])])
3651 AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
3652 gcc_cv_as_ld_jalr_reloc=no
3653 if test $gcc_cv_as_mips_explicit_relocs = yes; then
3654 if test $in_tree_ld = yes ; then
3655 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
3656 && test $in_tree_ld_is_elf = yes; then
3657 gcc_cv_as_ld_jalr_reloc=yes
3659 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
3660 echo ' .ent x' > conftest.s
3661 echo 'x: ld $2,%got_disp(y)($3)' >> conftest.s
3662 echo ' ld $25,%call16(y)($28)' >> conftest.s
3663 echo ' .reloc 1f,R_MIPS_JALR,y' >> conftest.s
3664 echo '1: jalr $25' >> conftest.s
3665 echo ' .reloc 1f,R_MIPS_JALR,x' >> conftest.s
3666 echo '1: jalr $25' >> conftest.s
3667 echo ' .end x' >> conftest.s
3668 if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
3669 && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
3670 if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
3671 && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
3672 gcc_cv_as_ld_jalr_reloc=yes
3678 if test $gcc_cv_as_ld_jalr_reloc = yes; then
3679 if test x$target_cpu_default = x; then
3680 target_cpu_default=MASK_RELAX_PIC_CALLS
3682 target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
3685 AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
3687 AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
3688 [gcc_cv_ld_mips_personality_relaxation],
3689 [gcc_cv_ld_mips_personality_relaxation=no
3690 if test $in_tree_ld = yes ; then
3691 if test "$gcc_cv_gld_major_version" -eq 2 \
3692 -a "$gcc_cv_gld_minor_version" -ge 21 \
3693 -o "$gcc_cv_gld_major_version" -gt 2; then
3694 gcc_cv_ld_mips_personality_relaxation=yes
3696 elif test x$gcc_cv_as != x \
3697 -a x$gcc_cv_ld != x \
3698 -a x$gcc_cv_readelf != x ; then
3699 cat > conftest.s <<EOF
3701 .cfi_personality 0x80,indirect_ptr
3708 .section .data,"aw",@progbits
3712 if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
3713 && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
3714 if $gcc_cv_readelf -d conftest 2>&1 \
3715 | grep TEXTREL > /dev/null 2>&1; then
3717 elif $gcc_cv_readelf --relocs conftest 2>&1 \
3718 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
3721 gcc_cv_ld_mips_personality_relaxation=yes
3725 rm -f conftest.s conftest.o conftest])
3726 if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
3727 AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
3728 [Define if your linker can relax absolute .eh_frame personality
3729 pointers into PC-relative form.])
3734 # Mips and HP-UX need the GNU assembler.
3735 # Linux on IA64 might be able to use the Intel assembler.
3738 mips*-*-* | *-*-hpux* )
3739 if test x$gas_flag = xyes \
3740 || test x"$host" != x"$build" \
3741 || test ! -x "$gcc_cv_as" \
3742 || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
3745 echo "*** This configuration requires the GNU assembler" >&2
3751 # ??? Not all targets support dwarf2 debug_line, even within a version
3752 # of gas. Moreover, we need to emit a valid instruction to trigger any
3753 # info to the output file. So, as supported targets are added to gas 2.11,
3754 # add some instruction here to (also) show we expect this might work.
3755 # ??? Once 2.11 is released, probably need to add first known working
3756 # version to the per-target configury.
3758 i?86*-*-* | mips*-*-* | alpha*-*-* | powerpc*-*-* | sparc*-*-* | m68*-*-* \
3759 | x86_64*-*-* | hppa*-*-* | arm*-*-* | avr*-*-* \
3760 | xstormy16*-*-* | cris-*-* | crisv32-*-* | xtensa*-*-* | bfin-*-* | score*-*-* \
3761 | spu-*-* | fido*-*-* | m32c-*-* | microblaze-*-*)
3764 ia64*-*-* | s390*-*-*)
3771 if test x"$insn" != x; then
3773 .file 1 \"conftest.s\"
3776 gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
3777 gcc_cv_as_dwarf2_debug_line,
3778 [elf,2,11,0],, [$conftest_s],
3779 [if test x$gcc_cv_objdump != x \
3780 && $gcc_cv_objdump -h conftest.o 2> /dev/null \
3781 | grep debug_line > /dev/null 2>&1; then
3782 gcc_cv_as_dwarf2_debug_line=yes
3785 # The .debug_line file table must be in the exact order that
3786 # we specified the files, since these indices are also used
3787 # by DW_AT_decl_file. Approximate this test by testing if
3788 # the assembler bitches if the same index is assigned twice.
3789 gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
3790 gcc_cv_as_dwarf2_file_buggy,,,
3794 if test $gcc_cv_as_dwarf2_debug_line = yes \
3795 && test $gcc_cv_as_dwarf2_file_buggy = no; then
3796 AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
3797 [Define if your assembler supports dwarf2 .file/.loc directives,
3798 and preserves file table indices exactly as given.])
3801 gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
3802 gcc_cv_as_gdwarf2_flag,
3803 [elf,2,11,0], [--gdwarf2], [$insn],,
3804 [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
3805 [Define if your assembler supports the --gdwarf2 option.])])
3807 gcc_GAS_CHECK_FEATURE([--gstabs option],
3808 gcc_cv_as_gstabs_flag,
3809 [elf,2,11,0], [--gstabs], [$insn],
3810 [# The native Solaris 9/Intel assembler doesn't understand --gstabs
3811 # and warns about it, but still exits successfully. So check for
3813 if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
3815 else gcc_cv_as_gstabs_flag=yes
3817 [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
3818 [Define if your assembler supports the --gstabs option.])])
3820 gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
3821 gcc_cv_as_debug_prefix_map_flag,
3822 [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
3823 [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
3824 [Define if your assembler supports the --debug-prefix-map option.])])
3827 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
3830 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
3831 [Define if your assembler supports .lcomm with an alignment field.])])
3833 AC_ARG_ENABLE(gnu-unique-object,
3834 [ --enable-gnu-unique-object enable the use of the @gnu_unique_object ELF extension on
3836 [case $enable_gnu_unique_object in
3838 *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
3839 Valid choices are 'yes' and 'no'.]) ;;
3841 [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
3843 [.type foo, @gnu_unique_object],,
3844 # Also check for ld.so support, i.e. glibc 2.11 or higher.
3845 [[if test x$host = x$build -a x$host = x$target &&
3846 glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
3847 glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
3848 glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
3849 glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
3850 if test "$glibcnum" -ge 2011 ; then
3851 enable_gnu_unique_object=yes
3854 if test x$enable_gnu_unique_object = xyes; then
3855 AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
3856 [Define if your assembler supports @gnu_unique_object.])
3859 AC_CACHE_CHECK([assembler for tolerance to line number 0],
3860 [gcc_cv_as_line_zero],
3861 [gcc_cv_as_line_zero=no
3862 if test $in_tree_gas = yes; then
3863 gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
3864 elif test "x$gcc_cv_as" != x; then
3865 { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
3866 if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
3867 test "x`cat conftest.out`" = x
3869 gcc_cv_as_line_zero=yes
3871 echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
3872 cat conftest.s >&AS_MESSAGE_LOG_FD
3873 echo "configure: error output was" >&AS_MESSAGE_LOG_FD
3874 cat conftest.out >&AS_MESSAGE_LOG_FD
3876 rm -f conftest.o conftest.s conftest.out
3878 if test "x$gcc_cv_as_line_zero" = xyes; then
3879 AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
3880 [Define if the assembler won't complain about a line such as # 0 "" 2.])
3883 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
3884 gcc_cv_ld_eh_frame_hdr=no
3885 if test $in_tree_ld = yes ; then
3886 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
3887 && test $in_tree_ld_is_elf = yes; then
3888 gcc_cv_ld_eh_frame_hdr=yes
3890 elif test x$gcc_cv_ld != x; then
3891 # Check if linker supports --eh-frame-hdr option
3892 if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
3893 gcc_cv_ld_eh_frame_hdr=yes
3896 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
3897 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
3898 AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
3899 [Define if your linker supports --eh-frame-hdr option.])
3901 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
3903 AC_MSG_CHECKING(linker position independent executable support)
3905 if test $in_tree_ld = yes ; then
3906 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
3907 && test $in_tree_ld_is_elf = yes; then
3910 elif test x$gcc_cv_ld != x; then
3911 # Check if linker supports -pie option
3912 if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
3916 if test x"$gcc_cv_ld_pie" = xyes; then
3917 AC_DEFINE(HAVE_LD_PIE, 1,
3918 [Define if your linker supports -pie option.])
3920 AC_MSG_RESULT($gcc_cv_ld_pie)
3922 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
3923 gcc_cv_ld_eh_gc_sections=no
3924 if test $in_tree_ld = yes ; then
3925 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
3926 && test $in_tree_ld_is_elf = yes; then
3927 gcc_cv_ld_eh_gc_sections=yes
3929 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3930 cat > conftest.s <<EOF
3933 .type _start, @function
3936 .size _start, .-_start
3937 .section .text.foo,"ax",@progbits
3938 .type foo, @function
3942 .section .gcc_except_table.foo,"a",@progbits
3945 .section .eh_frame,"a",@progbits
3948 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3949 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3950 | grep "gc-sections option ignored" > /dev/null; then
3951 gcc_cv_ld_eh_gc_sections=no
3952 elif $gcc_cv_objdump -h conftest 2> /dev/null \
3953 | grep gcc_except_table > /dev/null; then
3954 gcc_cv_ld_eh_gc_sections=yes
3955 # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
3956 if test x$gcc_cv_as_comdat_group != xyes; then
3957 gcc_cv_ld_eh_gc_sections=no
3958 cat > conftest.s <<EOF
3961 .type _start, @function
3964 .size _start, .-_start
3965 .section .gnu.linkonce.t.foo,"ax",@progbits
3966 .type foo, @function
3970 .section .gcc_except_table.foo,"a",@progbits
3973 .section .eh_frame,"a",@progbits
3976 if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3977 if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3978 | grep "gc-sections option ignored" > /dev/null; then
3979 gcc_cv_ld_eh_gc_sections=no
3980 elif $gcc_cv_objdump -h conftest 2> /dev/null \
3981 | grep gcc_except_table > /dev/null; then
3982 gcc_cv_ld_eh_gc_sections=yes
3988 rm -f conftest.s conftest.o conftest
3992 # ??? This apparently exposes a binutils bug with PC-relative relocations.
3993 gcc_cv_ld_eh_gc_sections=no
3996 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
3997 AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
3998 [Define if your linker supports garbage collection of
3999 sections in presence of EH frames.])
4001 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
4007 AC_CACHE_CHECK(linker --as-needed support,
4008 gcc_cv_ld_as_needed,
4009 [gcc_cv_ld_as_needed=no
4010 if test $in_tree_ld = yes ; then
4011 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4012 && test $in_tree_ld_is_elf = yes; then
4013 gcc_cv_ld_as_needed=yes
4015 elif test x$gcc_cv_ld != x; then
4016 # Check if linker supports --as-needed and --no-as-needed options
4017 if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
4018 gcc_cv_ld_as_needed=yes
4022 if test x"$gcc_cv_ld_as_needed" = xyes; then
4023 AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
4024 [Define if your linker supports --as-needed and --no-as-needed options.])
4027 case "$target:$tm_file" in
4028 powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
4029 AC_CACHE_CHECK(linker support for omitting dot symbols,
4030 gcc_cv_ld_no_dot_syms,
4031 [gcc_cv_ld_no_dot_syms=no
4032 if test $in_tree_ld = yes ; then
4033 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
4034 gcc_cv_ld_no_dot_syms=yes
4036 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4037 cat > conftest1.s <<EOF
4041 cat > conftest2.s <<EOF
4042 .section ".opd","aw"
4047 .quad .LEfoo,.TOC.@tocbase,0
4053 if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
4054 && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
4055 && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
4056 gcc_cv_ld_no_dot_syms=yes
4058 rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
4061 if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
4062 AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
4063 [Define if your PowerPC64 linker only needs function descriptor syms.])
4066 AC_CACHE_CHECK(linker large toc support,
4067 gcc_cv_ld_large_toc,
4068 [gcc_cv_ld_large_toc=no
4069 if test $in_tree_ld = yes ; then
4070 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
4071 gcc_cv_ld_large_toc=yes
4073 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4074 cat > conftest.s <<EOF
4075 .section ".tbss","awT",@nobits
4081 addis 9,13,ie0@got@tprel@ha
4082 ld 9,ie0@got@tprel@l(9)
4084 if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
4085 && $gcc_cv_ld -melf64ppc --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
4086 gcc_cv_ld_large_toc=yes
4088 rm -f conftest conftest.o conftest.s
4091 if test x"$gcc_cv_ld_large_toc" = xyes; then
4092 AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4093 [Define if your PowerPC64 linker supports a large TOC.])
4098 AC_CACHE_CHECK(linker --build-id support,
4100 [gcc_cv_ld_buildid=no
4101 if test $in_tree_ld = yes ; then
4102 if test "$gcc_cv_gld_major_version" -eq 2 -a \
4103 "$gcc_cv_gld_minor_version" -ge 18 -o \
4104 "$gcc_cv_gld_major_version" -gt 2 \
4105 && test $in_tree_ld_is_elf = yes; then
4106 gcc_cv_ld_buildid=yes
4108 elif test x$gcc_cv_ld != x; then
4109 if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
4110 gcc_cv_ld_buildid=yes
4113 if test x"$gcc_cv_ld_buildid" = xyes; then
4114 AC_DEFINE(HAVE_LD_BUILDID, 1,
4115 [Define if your linker supports --build-id.])
4118 AC_ARG_ENABLE(linker-build-id,
4119 [ --enable-linker-build-id
4120 compiler will always pass --build-id to linker],
4122 enable_linker_build_id=no)
4124 if test x"$enable_linker_build_id" = xyes; then
4125 if test x"$gcc_cv_ld_buildid" = xyes; then
4126 AC_DEFINE(ENABLE_LD_BUILDID, 1,
4127 [Define if gcc should always pass --build-id to linker.])
4129 AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
4133 # In binutils 2.21, GNU ld gained support for new emulations fully
4134 # supporting the Solaris 2 ABI. Detect their presence in the linker used.
4135 AC_CACHE_CHECK(linker *_sol2 emulation support,
4136 gcc_cv_ld_sol2_emulation,
4137 [gcc_cv_ld_sol2_emulation=no
4138 if test $in_tree_ld = yes ; then
4139 if test "$gcc_cv_gld_major_version" -eq 2 -a \
4140 "$gcc_cv_gld_minor_version" -ge 21 -o \
4141 "$gcc_cv_gld_major_version" -gt 2 \
4142 && test $in_tree_ld_is_elf = yes; then
4143 gcc_cv_ld_sol2_emulation=yes
4145 elif test x$gcc_cv_ld != x; then
4146 if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
4147 grep _sol2 > /dev/null; then
4148 gcc_cv_ld_sol2_emulation=yes
4151 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
4152 AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
4153 [Define if your linker supports the *_sol2 emulations.])
4156 AC_CACHE_CHECK(linker --sysroot support,
4158 [gcc_cv_ld_sysroot=no
4159 if test $in_tree_ld = yes ; then
4160 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
4161 gcc_cv_ld_sysroot=yes
4163 elif test x$gcc_cv_ld != x; then
4164 if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
4165 gcc_cv_ld_sysroot=yes
4168 if test x"$gcc_cv_ld_sysroot" = xyes; then
4169 AC_DEFINE(HAVE_LD_SYSROOT, 1,
4170 [Define if your linker supports --sysroot.])
4173 if test x$with_sysroot = x && test x$host = x$target \
4174 && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4175 && test "$prefix" != "NONE"; then
4176 AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4177 [Define to PREFIX/include if cpp should also search that directory.])
4180 # Test for stack protector support in target C library.
4181 AC_CACHE_CHECK(__stack_chk_fail in target C library,
4182 gcc_cv_libc_provides_ssp,
4183 [gcc_cv_libc_provides_ssp=no
4185 *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
4186 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4187 if test "x$with_headers" != x; then
4188 glibc_header_dir=$with_headers
4189 elif test "x$with_sysroot" = x; then
4190 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4191 elif test "x$with_build_sysroot" != "x"; then
4192 glibc_header_dir="${with_build_sysroot}/usr/include"
4193 elif test "x$with_sysroot" = xyes; then
4194 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4196 glibc_header_dir="${with_sysroot}/usr/include"
4199 glibc_header_dir=/usr/include
4201 [# glibc 2.4 and later provides __stack_chk_fail and
4202 # either __stack_chk_guard, or TLS access to stack guard canary.
4203 if test -f $glibc_header_dir/features.h \
4204 && $EGREP '^[ ]*#[ ]*define[ ]+__GNU_LIBRARY__[ ]+([1-9][0-9]|[6-9])' \
4205 $glibc_header_dir/features.h > /dev/null; then
4206 if $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+([1-9][0-9]|[3-9])' \
4207 $glibc_header_dir/features.h > /dev/null; then
4208 gcc_cv_libc_provides_ssp=yes
4209 elif $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+2' \
4210 $glibc_header_dir/features.h > /dev/null \
4211 && $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC_MINOR__[ ]+([1-9][0-9]|[4-9])' \
4212 $glibc_header_dir/features.h > /dev/null; then
4213 gcc_cv_libc_provides_ssp=yes
4214 elif $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC__[ ]+1' \
4215 $glibc_header_dir/features.h > /dev/null && \
4216 test -f $glibc_header_dir/bits/uClibc_config.h && \
4217 $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC_HAS_SSP__[ ]+1' \
4218 $glibc_header_dir/bits/uClibc_config.h > /dev/null; then
4219 gcc_cv_libc_provides_ssp=yes
4224 # Avoid complicated tests (see
4225 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
4226 # simply assert that glibc does provide this, which is true for all
4227 # realistically usable GNU/Hurd configurations.
4228 gcc_cv_libc_provides_ssp=yes;;
4229 *-*-darwin* | *-*-freebsd*)
4230 AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
4231 [echo "no __stack_chk_fail on this target"])
4233 *) gcc_cv_libc_provides_ssp=no ;;
4236 if test x$gcc_cv_libc_provides_ssp = xyes; then
4237 AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
4238 [Define if your target C library provides stack protector support])
4241 # Check if TFmode long double should be used by default or not.
4242 # Some glibc targets used DFmode long double, but with glibc 2.4
4243 # and later they can use TFmode.
4245 powerpc*-*-linux* | \
4250 AC_ARG_WITH(long-double-128,
4251 [ --with-long-double-128 Use 128-bit long double by default.],
4252 gcc_cv_target_ldbl128="$with_long_double_128",
4253 [[gcc_cv_target_ldbl128=no
4254 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4255 if test "x$with_sysroot" = x; then
4256 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4257 elif test "x$with_build_sysroot" != "x"; then
4258 glibc_header_dir="${with_build_sysroot}/usr/include"
4259 elif test "x$with_sysroot" = xyes; then
4260 glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4262 glibc_header_dir="${with_sysroot}/usr/include"
4265 glibc_header_dir=/usr/include
4267 grep '^[ ]*#[ ]*define[ ][ ]*__LONG_DOUBLE_MATH_OPTIONAL' \
4268 $glibc_header_dir/bits/wordsize.h > /dev/null 2>&1 \
4269 && gcc_cv_target_ldbl128=yes
4273 if test x$gcc_cv_target_ldbl128 = xyes; then
4274 AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
4275 [Define if TFmode long double should be the default])
4278 # Find out what GC implementation we want, or may, use.
4280 [ --with-gc={page,zone} choose the garbage collection mechanism to use
4288 AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
4291 AC_MSG_ERROR([$withval is an invalid option to --with-gc])
4296 echo "Using $GGC for garbage collection."
4298 # Libraries to use on the host. This will normally be set by the top
4299 # level Makefile. Here we simply capture the value for our Makefile.
4300 if test -z "${HOST_LIBS+set}"; then
4305 # Use the system's zlib library.
4307 zlibinc="-I\$(srcdir)/../zlib"
4308 AC_ARG_WITH(system-zlib,
4309 [ --with-system-zlib use installed libz],
4316 dnl Very limited version of automake's enable-maintainer-mode
4318 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
4319 dnl maintainer-mode is disabled by default
4320 AC_ARG_ENABLE(maintainer-mode,
4321 [ --enable-maintainer-mode
4322 enable make rules and dependencies not useful
4323 (and sometimes confusing) to the casual installer],
4324 maintainer_mode=$enableval,
4327 AC_MSG_RESULT($maintainer_mode)
4329 if test "$maintainer_mode" = "yes"; then
4340 # Make empty files to contain the specs and options for each language.
4341 # Then add #include lines to for a compiler that has specs and/or options.
4347 # These (without "all_") are set in each config-lang.in.
4348 # `language' must be a single word so is spelled singularly.
4351 all_outputs='Makefile gccbug'
4352 # List of language makefile fragments.
4354 # Additional files for gengtype
4355 all_gtfiles="$target_gtfiles"
4357 # These are the languages that are set in --enable-languages,
4358 # and are available in the GCC tree.
4359 all_selected_languages=
4361 # Add the language fragments.
4362 # Languages are added via two mechanisms. Some information must be
4363 # recorded in makefile variables, these are defined in config-lang.in.
4364 # We accumulate them and plug them into the main Makefile.
4365 # The other mechanism is a set of hooks for each of the main targets
4366 # like `clean', `install', etc.
4368 language_hooks="Make-hooks"
4370 for lang in ${srcdir}/*/config-lang.in
4373 test "$lang" = "${srcdir}/*/config-lang.in" && continue
4375 lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^ ]*\).*$,\1,p' $lang`
4376 if test "x$lang_alias" = x
4378 echo "$lang doesn't set \$language." 1>&2
4381 subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
4382 subdirs="$subdirs $subdir"
4384 # $gcc_subdir is where the gcc integration files are to be found
4385 # for a language, both for internal compiler purposes (compiler
4386 # sources implementing front-end to GCC tree converters), and for
4387 # build infrastructure purposes (Make-lang.in, etc.)
4389 # This will be <subdir> (relative to $srcdir) if a line like
4390 # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
4391 # is found in <langdir>/config-lang.in, and will remain <langdir>
4394 # Except for the language alias (fetched above), the regular
4395 # "config-lang.in" contents are always retrieved from $gcc_subdir,
4396 # so a <langdir>/config-lang.in setting gcc_subdir typically sets
4397 # only this and the language alias.
4399 gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^ ]*\).*$,\1,p' $lang`
4400 if [ "$gcc_subdir" = "" ]; then
4401 gcc_subdir="$subdir"
4404 case ",$enable_languages," in
4406 all_selected_languages="$all_selected_languages $lang_alias"
4407 if test -f $srcdir/$gcc_subdir/lang-specs.h; then
4408 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
4420 . ${srcdir}/$gcc_subdir/config-lang.in
4421 if test "x$language" = x
4423 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
4428 case ",$enable_languages," in
4431 for i in $subdir_requires; do
4432 test -f "${srcdir}/$i/config-lang.in" && continue
4440 all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
4441 if test -f $srcdir/$gcc_subdir/lang.opt; then
4442 lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
4444 if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
4445 lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
4447 all_languages="$all_languages $language"
4448 all_compilers="$all_compilers $compilers"
4449 all_outputs="$all_outputs $outputs"
4450 all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
4451 case ",$enable_languages," in
4453 AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
4455 AC_SUBST(enable_lto)
4456 # LTO needs to speak the platform's object file format, and has a
4457 # number of implementations of the required binary file access APIs.
4458 # ELF is the most common, and default. We only link libelf if ELF
4459 # is indeed the selected format.
4460 LTO_BINARY_READER=${lto_binary_reader}
4461 LTO_USE_LIBELF=-lelf
4462 if test "x$lto_binary_reader" != "xlto-elf" ; then
4465 AC_SUBST(LTO_BINARY_READER)
4466 AC_SUBST(LTO_USE_LIBELF)
4472 # Pick up gtfiles for c
4474 . ${srcdir}/c-config-lang.in
4475 all_gtfiles="$all_gtfiles [[c]] $gtfiles"
4478 for language in $all_selected_languages
4480 check_languages="$check_languages check-$language"
4483 # We link each language in with a set of hooks, reached indirectly via
4484 # lang.${target}. Only do so for selected languages.
4488 target_list="all.cross start.encap rest.encap tags \
4489 install-common install-man install-info install-pdf install-html dvi \
4490 pdf html uninstall info man srcextra srcman srcinfo \
4491 mostlyclean clean distclean maintainer-clean install-plugin"
4493 for t in $target_list
4496 for lang in $all_selected_languages
4500 echo "lang.$t: $x" >> Make-hooks
4509 echo "dir ." > .gdbinit
4510 echo "dir ${srcdir}" >> .gdbinit
4511 if test x$gdb_needs_out_file_path = xyes
4513 echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
4515 if test "x$subdirs" != x; then
4518 echo "dir ${srcdir}/$s" >> .gdbinit
4521 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
4523 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
4524 AC_SUBST(gcc_tooldir)
4527 # Find a directory in which to install a shared libgcc.
4529 AC_ARG_ENABLE(version-specific-runtime-libs,
4530 [ --enable-version-specific-runtime-libs
4531 specify that runtime libraries should be
4532 installed in a compiler-specific directory])
4534 AC_ARG_WITH(slibdir,
4535 [ --with-slibdir=DIR shared libraries in DIR [[LIBDIR]]],
4536 slibdir="$with_slibdir",
4537 if test "${enable_version_specific_runtime_libs+set}" = set; then
4538 slibdir='$(libsubdir)'
4539 elif test "$host" != "$target"; then
4540 slibdir='$(build_tooldir)/lib'
4546 # Substitute configuration variables
4549 AC_SUBST(all_compilers)
4550 AC_SUBST(all_gtfiles)
4551 AC_SUBST(all_lang_makefrags)
4552 AC_SUBST(all_languages)
4553 AC_SUBST(all_selected_languages)
4554 AC_SUBST(build_exeext)
4555 AC_SUBST(build_install_headers_dir)
4556 AC_SUBST(build_xm_file_list)
4557 AC_SUBST(build_xm_include_list)
4558 AC_SUBST(build_xm_defines)
4559 AC_SUBST(build_file_translate)
4560 AC_SUBST(check_languages)
4561 AC_SUBST(cpp_install_dir)
4562 AC_SUBST(xmake_file)
4563 AC_SUBST(tmake_file)
4564 AC_SUBST(TM_ENDIAN_CONFIG)
4565 AC_SUBST(TM_MULTILIB_CONFIG)
4566 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
4567 AC_SUBST(extra_gcc_objs)
4568 AC_SUBST(user_headers_inc_next_pre)
4569 AC_SUBST(user_headers_inc_next_post)
4570 AC_SUBST(extra_headers_list)
4571 AC_SUBST(extra_objs)
4572 AC_SUBST(extra_parts)
4573 AC_SUBST(extra_passes)
4574 AC_SUBST(extra_programs)
4575 AC_SUBST(float_h_file)
4576 AC_SUBST(gcc_config_arguments)
4577 AC_SUBST(gcc_gxx_include_dir)
4578 AC_SUBST(host_exeext)
4579 AC_SUBST(host_xm_file_list)
4580 AC_SUBST(host_xm_include_list)
4581 AC_SUBST(host_xm_defines)
4582 AC_SUBST(out_host_hook_obj)
4584 AC_SUBST(lang_opt_files)
4585 AC_SUBST(lang_specs_files)
4586 AC_SUBST(lang_tree_files)
4587 AC_SUBST(local_prefix)
4589 AC_SUBST(objc_boehm_gc)
4591 AC_SUBST(out_object_file)
4592 AC_SUBST(thread_file)
4593 AC_SUBST(tm_file_list)
4594 AC_SUBST(tm_include_list)
4595 AC_SUBST(tm_defines)
4596 AC_SUBST(tm_p_file_list)
4597 AC_SUBST(tm_p_include_list)
4598 AC_SUBST(xm_file_list)
4599 AC_SUBST(xm_include_list)
4600 AC_SUBST(xm_defines)
4601 AC_SUBST(use_gcc_stdint)
4602 AC_SUBST(c_target_objs)
4603 AC_SUBST(cxx_target_objs)
4604 AC_SUBST(fortran_target_objs)
4605 AC_SUBST(target_cpu_default)
4607 AC_SUBST_FILE(language_hooks)
4610 if test x${build} = x${host} ; then
4611 if test x${host} = x${target} ; then
4612 echo "Links are now set up to build a native compiler for ${target}." 1>&2
4614 echo "Links are now set up to build a cross-compiler" 1>&2
4615 echo " from ${host} to ${target}." 1>&2
4618 if test x${host} = x${target} ; then
4619 echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
4620 echo " for ${target}." 1>&2
4622 echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
4623 echo " from ${host} to ${target}." 1>&2
4627 AC_ARG_VAR(GMPLIBS,[How to link GMP])
4628 AC_ARG_VAR(GMPINC,[How to find GMP include files])
4630 AC_ARG_VAR(PPLLIBS,[How to link PPL])
4631 AC_ARG_VAR(PPLINC,[How to find PPL include files])
4633 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
4634 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
4635 if test "x${CLOOGLIBS}" != "x" ; then
4636 AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
4639 AC_ARG_VAR(LIBELFLIBS,[How to link libelf])
4640 AC_ARG_VAR(LIBELFINC,[How to find libelf include files])
4641 if test "x${LIBELFLIBS}" != "x" ; then
4642 AC_DEFINE(HAVE_libelf, 1, [Define if libelf is in use.])
4645 # Check for plugin support
4646 AC_ARG_ENABLE(plugin,
4647 [ --enable-plugin enable plugin support],
4648 enable_plugin=$enableval,
4649 enable_plugin=yes; default_plugin=yes)
4655 if test x$build = x$host; then
4656 export_sym_check="nm${exeext} -g"
4657 elif test x$host = x$target; then
4658 export_sym_check="$gcc_cv_nm -g"
4664 if test x$build = x$host; then
4665 export_sym_check="objdump${exeext} -T"
4666 elif test x$host = x$target; then
4667 export_sym_check="$gcc_cv_objdump -T"
4674 if test x"$enable_plugin" = x"yes"; then
4676 AC_MSG_CHECKING([for exported symbols])
4677 if test "x$export_sym_check" != x; then
4678 echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
4679 ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
4680 if $export_sym_check conftest | grep foobar > /dev/null; then
4681 : # No need to use a flag
4682 AC_MSG_RESULT([yes])
4684 AC_MSG_RESULT([yes])
4685 AC_MSG_CHECKING([for -rdynamic])
4686 ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
4687 if $export_sym_check conftest | grep foobar > /dev/null; then
4689 pluginlibs="-rdynamic"
4694 AC_MSG_RESULT([$plugin_rdynamic])
4697 AC_MSG_RESULT([unable to check])
4702 AC_SEARCH_LIBS([dlopen], [dl])
4703 if test x"$ac_cv_search_dlopen" = x"-ldl"; then
4704 pluginlibs="$pluginlibs -ldl"
4708 # Check that we can build shared objects with -fPIC -shared
4709 saved_LDFLAGS="$LDFLAGS"
4712 LDFLAGS="$LDFLAGS -fPIC -shared -undefined dynamic_lookup"
4715 LDFLAGS="$LDFLAGS -fPIC -shared"
4718 AC_MSG_CHECKING([for -fPIC -shared])
4720 [extern int X;],[return X == 0;],
4721 [AC_MSG_RESULT([yes]); have_pic_shared=yes],
4722 [AC_MSG_RESULT([no]); have_pic_shared=no])
4723 if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
4727 LDFLAGS="$saved_LDFLAGS"
4729 # If plugin support had been requested but not available, fail.
4730 if test x"$enable_plugin" = x"no" ; then
4731 if test x"$default_plugin" != x"yes"; then
4733 Building GCC with plugin support requires a host that supports
4734 -fPIC, -shared, -ldl and -rdynamic.])
4739 AC_SUBST(pluginlibs)
4740 AC_SUBST(enable_plugin)
4741 if test x"$enable_plugin" = x"yes"; then
4742 AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
4745 # Configure the subdirectories
4746 # AC_CONFIG_SUBDIRS($subdirs)
4748 # Create the Makefile
4749 # and configure language subdirectories
4750 AC_CONFIG_FILES($all_outputs)
4752 AC_CONFIG_COMMANDS([default],
4754 case ${CONFIG_HEADERS} in
4755 *auto-host.h:config.in*)
4758 # Make sure all the subdirs exist.
4759 for d in $subdirs doc build c-family
4761 test -d $d || mkdir $d
4764 [subdirs='$subdirs'])