1 dnl Process this file with autoconf to produce a configure script.
2 dnl Note we do not use AC_PREREQ here! See aclocal.m4 for what we use instead.
3 AC_INIT([GNU C Library], [(see version.h)], [http://sourceware.org/bugzilla/], [glibc])
4 AC_CONFIG_SRCDIR([include/features.h])
5 AC_CONFIG_HEADERS([config.h])
6 AC_CONFIG_AUX_DIR([scripts])
8 ACX_PKGVERSION([GNU libc])
9 ACX_BUGURL([http://www.gnu.org/software/libc/bugs.html])
10 AC_DEFINE_UNQUOTED([PKGVERSION], ["$PKGVERSION"],
11 [Package description])
12 AC_DEFINE_UNQUOTED([REPORT_BUGS_TO], ["$REPORT_BUGS_TO"],
13 [Bug reporting address])
15 # Glibc should not depend on any header files
16 AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS],
17 [m4_divert_text([DEFAULTS],
18 [ac_includes_default='/* none */'])])
20 dnl This is here so we can set $subdirs directly based on configure fragments.
26 if test $host != $build; then
27 AC_CHECK_PROGS(BUILD_CC, gcc cc)
29 AC_SUBST(cross_compiling)
31 # We need the C++ compiler only for testing.
33 AC_CHECK_TOOL(READELF, readelf, false)
35 if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
36 AC_MSG_ERROR([you must configure in a separate build directory])
39 # This will get text that should go into config.make.
42 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
44 AC_HELP_STRING([--with-gd=DIR],
45 [find libgd include dir and library with prefix DIR]),
49 *) libgd_include="-I$withval/include"
50 libgd_ldflags="-L$withval/lib" ;;
53 AC_ARG_WITH([gd-include],
54 AC_HELP_STRING([--with-gd-include=DIR],
55 [find libgd include files in DIR]),
57 case "$with_gd_include" in
59 *) libgd_include="-I$withval" ;;
63 AC_HELP_STRING([--with-gd-lib=DIR],
64 [find libgd library files in DIR]),
66 case "$with_gd_lib" in
68 *) libgd_ldflags="-L$withval" ;;
72 if test -n "$libgd_include"; then
73 config_vars="$config_vars
74 CFLAGS-memusagestat.c = $libgd_include"
76 if test -n "$libgd_ldflags"; then
77 config_vars="$config_vars
78 libgd-LDFLAGS = $libgd_ldflags"
81 dnl Arguments to specify presence of other packages/features.
83 AC_HELP_STRING([--with-fp],
84 [if using floating-point hardware @<:@default=yes@:>@]),
88 AC_ARG_WITH([binutils],
89 AC_HELP_STRING([--with-binutils=PATH],
90 [specify location of binutils (as and ld)]),
91 [path_binutils=$withval],
93 AC_ARG_WITH([selinux],
94 AC_HELP_STRING([--with-selinux],
95 [if building with SELinux support]),
96 [with_selinux=$withval],
99 AC_ARG_WITH([headers],
100 AC_HELP_STRING([--with-headers=PATH],
101 [location of system headers to use
102 (for example /usr/src/linux/include)
103 @<:@default=compiler default@:>@]),
104 [sysheaders=$withval],
108 AC_SUBST(use_default_link)
109 AC_ARG_WITH([default-link],
110 AC_HELP_STRING([--with-default-link],
111 [do not use explicit linker scripts]),
112 [use_default_link=$withval],
113 [use_default_link=default])
115 AC_ARG_ENABLE([sanity-checks],
116 AC_HELP_STRING([--disable-sanity-checks],
117 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
118 [enable_sanity=$enableval],
121 AC_ARG_ENABLE([shared],
122 AC_HELP_STRING([--enable-shared],
123 [build shared library @<:@default=yes if GNU ld@:>@]),
126 AC_ARG_ENABLE([profile],
127 AC_HELP_STRING([--enable-profile],
128 [build profiled library @<:@default=no@:>@]),
129 [profile=$enableval],
131 AC_ARG_ENABLE([versioning],
132 AC_HELP_STRING([--disable-versioning],
133 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
134 [enable_versioning=$enableval],
135 [enable_versioning=yes])
137 AC_ARG_ENABLE([oldest-abi],
138 AC_HELP_STRING([--enable-oldest-abi=ABI],
139 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
140 [oldest_abi=$enableval],
142 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
145 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
149 AC_ARG_ENABLE([hardcoded-path-in-tests],
150 AC_HELP_STRING([--enable-hardcoded-path-in-tests],
151 [hardcode newly built glibc path in tests @<:@default=no@:>@]),
152 [hardcoded_path_in_tests=$enableval],
153 [hardcoded_path_in_tests=no])
154 AC_SUBST(hardcoded_path_in_tests)
156 AC_ARG_ENABLE([stackguard-randomization],
157 AC_HELP_STRING([--enable-stackguard-randomization],
158 [initialize __stack_chk_guard canary with a random number at program start]),
159 [enable_stackguard_randomize=$enableval],
160 [enable_stackguard_randomize=no])
161 if test "$enable_stackguard_randomize" = yes; then
162 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
165 dnl Generic infrastructure for drop-in additions to libc.
166 AC_ARG_ENABLE([add-ons],
167 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
168 [configure and build add-ons in DIR1,DIR2,...
169 search for add-ons if no parameter given]),
170 , [enable_add_ons=yes])
172 AC_ARG_ENABLE([hidden-plt],
173 AC_HELP_STRING([--disable-hidden-plt],
174 [do not hide internal function calls to avoid PLT]),
177 if test "x$hidden" = xno; then
181 AC_ARG_ENABLE([bind-now],
182 AC_HELP_STRING([--enable-bind-now],
183 [disable lazy relocations in DSOs]),
184 [bindnow=$enableval],
188 dnl On some platforms we cannot use dynamic loading. We must provide
189 dnl static NSS modules.
190 AC_ARG_ENABLE([static-nss],
191 AC_HELP_STRING([--enable-static-nss],
192 [build static NSS modules @<:@default=no@:>@]),
193 [static_nss=$enableval],
195 dnl Enable static NSS also if we build no shared objects.
196 if test x"$static_nss" = xyes || test x"$shared" = xno; then
198 AC_DEFINE(DO_STATIC_NSS)
201 AC_ARG_ENABLE([force-install],
202 AC_HELP_STRING([--disable-force-install],
203 [don't force installation of files from this package, even if they are older than the installed files]),
204 [force_install=$enableval],
206 AC_SUBST(force_install)
208 dnl On some platforms we allow dropping compatibility with all kernel
210 AC_ARG_ENABLE([kernel],
211 AC_HELP_STRING([--enable-kernel=VERSION],
212 [compile for compatibility with kernel not older than VERSION]),
213 [minimum_kernel=$enableval],
215 dnl Prevent unreasonable values.
216 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
217 # Better nothing than this.
220 if test "$minimum_kernel" = current; then
221 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
225 dnl For the development we sometimes want gcc to issue even more warnings.
226 dnl This is not the default since many of the extra warnings are not
228 AC_ARG_ENABLE([all-warnings],
229 AC_HELP_STRING([--enable-all-warnings],
230 [enable all useful warnings gcc can issue]),
231 [all_warnings=$enableval],
233 AC_SUBST(all_warnings)
235 AC_ARG_ENABLE([multi-arch],
236 AC_HELP_STRING([--enable-multi-arch],
237 [enable single DSO with optimizations for multiple architectures]),
238 [multi_arch=$enableval],
239 [multi_arch=default])
241 AC_ARG_ENABLE([nss-crypt],
242 AC_HELP_STRING([--enable-nss-crypt],
243 [enable libcrypt to use nss]),
244 [nss_crypt=$enableval],
246 if test x$nss_crypt = xyes; then
247 nss_includes=-I$(nss-config --includedir 2>/dev/null)
248 if test $? -ne 0; then
249 AC_MSG_ERROR([cannot find include directory with nss-config])
252 CFLAGS="$CFLAGS $nss_includes"
253 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
255 #include <nsslowhash.h>
256 void f (void) { NSSLOW_Init (); }])],
257 libc_cv_nss_crypt=yes,
259 cannot find NSS headers with lowlevel hash function interfaces]))
261 LIBS="$LIBS -lfreebl3"
262 AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
264 #include <nsslowhash.h>],
266 libc_cv_nss_crypt=yes,
268 cannot link program using lowlevel NSS hash functions]))
274 AC_SUBST(libc_cv_nss_crypt)
277 AC_ARG_ENABLE([obsolete-rpc],
278 AC_HELP_STRING([--enable-obsolete-rpc],
279 [build and install the obsolete RPC code for link-time usage]),
280 [link_obsolete_rpc=$enableval],
281 [link_obsolete_rpc=no])
282 AC_SUBST(link_obsolete_rpc)
284 if test "$link_obsolete_rpc" = yes; then
285 AC_DEFINE(LINK_OBSOLETE_RPC)
288 AC_ARG_ENABLE([systemtap],
289 [AS_HELP_STRING([--enable-systemtap],
290 [enable systemtap static probe points @<:@default=no@:>@])],
291 [systemtap=$enableval],
293 if test "x$systemtap" != xno; then
294 AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl
296 CFLAGS="-std=gnu99 $CFLAGS"
297 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h>
298 void foo (int i, void *p)
300 asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) ""
301 :: STAP_PROBE_ASM_OPERANDS (2, i, p));
302 }]])], [libc_cv_sdt=yes], [libc_cv_sdt=no])
303 CFLAGS="$old_CFLAGS"])
304 if test $libc_cv_sdt = yes; then
305 AC_DEFINE([USE_STAP_PROBE])
306 elif test "x$systemtap" != xauto; then
307 AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support])
311 AC_ARG_ENABLE([build-nscd],
312 [AS_HELP_STRING([--disable-build-nscd],
313 [disable building and installing the nscd daemon])],
314 [build_nscd=$enableval],
315 [build_nscd=default])
318 # Note the use of $use_nscd is near the bottom of the file.
319 AC_ARG_ENABLE([nscd],
320 [AS_HELP_STRING([--disable-nscd],
321 [library functions will not contact the nscd daemon])],
322 [use_nscd=$enableval],
325 # The way shlib-versions is used to generate soversions.mk uses a
326 # fairly simplistic model for name recognition that can't distinguish
327 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
328 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
329 # tell. This doesn't get used much beyond that, so it's fairly safe.
334 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
338 # We keep the original values in `$config_*' and never modify them, so we
339 # can write them unchanged into config.make. Everything else uses
340 # $machine, $vendor, and $os, and changes them whenever convenient.
341 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
343 # Don't allow vendor == "unknown"
344 test "$config_vendor" = unknown && config_vendor=
345 config_os="`echo $config_os | sed 's/^unknown-//'`"
347 # Some configurations imply other options.
350 # The configure fragment of an add-on port can modify these to supplement
351 # or override the table in the case statement below. No fragment should
352 # ever change the config_* variables, however.
353 machine=$config_machine
354 vendor=$config_vendor
358 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
360 if test "$machine" = rs6000; then
364 # Braindead PowerPC box with absolutely no FPU.
365 case "$machine-$host_os" in
373 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
376 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
378 *) submachine="$withval" ;;
382 dnl Let sysdeps/*/preconfigure act here, like they can in add-ons.
383 LIBC_PRECONFIGURE([$srcdir], [for sysdeps])
385 # An add-on can set this when it wants to disable the sanity check below.
388 dnl Having this here, though empty, makes sure that if add-ons' fragments
389 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
390 dnl our AC_OUTPUT will actually use it.
393 case "$enable_add_ons" in
396 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
397 sed 's@/[[^/]]*$@@' | sort | uniq`
398 add_ons_automatic=yes
400 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
401 add_ons_automatic=no ;;
407 if test x"$add_ons" != x; then
408 for f in $add_ons; do
413 *** It seems that you're using an old \`crypt' add-on. crypt is now
414 *** part of glibc and using the old add-on will not work with this
415 *** release. Start again with fresh sources and without the old
416 *** \`crypt' add-on.])
420 *** It seems that you're using an old \`localedata' add-on. localedata
421 *** is now part of glibc and using the old add-on will not work with
422 *** this release. Start again with fresh sources and without the old
423 *** \`localedata' add-on.])
428 # Now source each add-on's configure fragment.
429 # The fragments can use $srcdir/$libc_add_on to find themselves,
430 # and test $add_ons_automatic to see if they were explicitly requested.
431 # A fragment can clear (or even change) $libc_add_on to affect
432 # whether it goes into the list to be actually used in the build.
434 for libc_add_on in $add_ons; do
435 # Test whether such a directory really exists.
436 # It can be absolute, or relative to $srcdir, or relative to the build dir.
437 case "$libc_add_on" in
439 libc_add_on_srcdir=$libc_add_on
442 test -d "$srcdir/$libc_add_on" || {
443 if test -d "$libc_add_on"; then
444 libc_add_on="`pwd`/$libc_add_on"
446 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
449 libc_add_on_srcdir=$srcdir/$libc_add_on
453 libc_add_on_frag=$libc_add_on_srcdir/configure
454 libc_add_on_canonical=
455 libc_add_on_config_subdirs=
456 if test -r "$libc_add_on_frag"; then
457 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
458 libc_add_on_canonical=unknown
460 . "$libc_add_on_frag"
461 test -z "$libc_add_on" || {
462 configured_add_ons="$configured_add_ons $libc_add_on"
463 if test "x$libc_add_on_canonical" = xunknown; then
464 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
466 for d in $libc_add_on_subdirs; do
467 case "$libc_add_on" in
468 /*) subdir_srcdir="$libc_add_on" ;;
469 *) subdir_srcdir="\$(..)$libc_add_on" ;;
473 d="${libc_add_on_canonical:-$libc_add_on}"
479 subdir_srcdir="$subdir_srcdir/$d"
482 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
483 add_on_subdirs="$add_on_subdirs $d"
484 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
485 $d-srcdir = $subdir_srcdir"
487 for d in $libc_add_on_config_subdirs; do
490 fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
492 if test ! -d "$libc_add_on_srcdir/$d"; then
493 AC_MSG_ERROR(fragment wants to configure missing directory $d)
495 case "$libc_add_on" in
497 relative path required for add-on using \$libc_add_on_config_subdirs) ;;
499 subdirs="$subdirs $libc_add_on/$d"
503 if test -n "$libc_add_on"; then
504 LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for])
505 use_add_ons="$use_add_ons $libc_add_on"
506 add_ons_pfx="$add_ons_pfx $libc_add_on/"
507 test -z "$libc_add_on_canonical" ||
508 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
511 # Use echo to strip excess whitespace.
512 add_ons="`echo $use_add_ons`"
515 AC_SUBST(add_on_subdirs)
519 ### I put this here to prevent those annoying emails from people who cannot
520 ### read and try to compile glibc on unsupported platforms. --drepper
522 ### By using the undocumented --enable-hacker-mode option for configure
523 ### one can skip this test to make the configuration not fail for unsupported
526 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
527 case "$machine-$host_os" in
531 echo "*** The GNU C library is currently not available for this platform."
532 echo "*** So far nobody cared to port it and if there is no volunteer it"
533 echo "*** might never happen. So, if you have interest to see glibc on"
534 echo "*** this platform visit"
535 echo "*** http://www.gnu.org/software/libc/porting.html"
536 echo "*** and join the group of porters"
542 dnl We need to use [ and ] for other purposes for a while now.
544 # Expand the configuration machine name into a subdirectory by architecture
545 # type and particular chip. If an add-on configure fragment already set
546 # base_machine, we don't change it.
547 test -n "$base_machine" || case "$machine" in
548 i[34567]86) base_machine=i386 machine=i386/$machine ;;
549 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
550 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
551 s390) base_machine=s390 machine=s390/s390-32 ;;
552 s390x) base_machine=s390 machine=s390/s390-64 ;;
553 sh3*) base_machine=sh machine=sh/sh3 ;;
554 sh4*) base_machine=sh machine=sh/sh4 ;;
556 base_machine=sparc machine=sparc/sparc32 ;;
557 sparcv8 | supersparc | hypersparc)
558 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
559 sparcv8plus | sparcv8plusa | sparcv9)
560 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
561 sparcv8plusb | sparcv9b)
562 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
564 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
566 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
568 base_machine=sparc machine=sparc/sparc64 ;;
570 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
572 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
574 base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
575 *) base_machine=$machine ;;
578 AC_SUBST(base_machine)
580 if test "$base_machine" = "i386"; then
581 AC_DEFINE(USE_REGPARMS)
584 # For the multi-arch option we need support in the assembler & linker.
585 AC_CACHE_CHECK([for assembler and linker STT_GNU_IFUNC support],
586 libc_cv_ld_gnu_indirect_function, [dnl
587 cat > conftest.S <<EOF
588 .type foo,%gnu_indirect_function
601 libc_cv_ld_gnu_indirect_function=no
602 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
603 -nostartfiles -nostdlib \
604 -o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
605 # Do a link to see if the backend supports IFUNC relocs.
606 $READELF -r conftest 1>&AS_MESSAGE_LOG_FD
607 LC_ALL=C $READELF -r conftest | grep 'no relocations' >/dev/null || {
608 libc_cv_ld_gnu_indirect_function=yes
613 AC_MSG_CHECKING(whether .text pseudo-op must be used)
614 AC_CACHE_VAL(libc_cv_dot_text, [dnl
615 cat > conftest.s <<EOF
619 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
620 libc_cv_dot_text=.text
623 if test -z "$libc_cv_dot_text"; then
629 if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then
630 if test x"$multi_arch" = xyes; then
631 AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
637 if test x"$multi_arch" != xno; then
638 multi_arch_d=/multiarch
641 # Compute the list of sysdep directories for this configuration.
642 # This can take a while to compute.
643 sysdep_dir=$srcdir/sysdeps
644 AC_MSG_CHECKING(sysdep dirs)
645 dnl We need to use [ and ] for other purposes for a while now.
647 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
648 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
650 test "x$base_os" != x || case "$os" in
657 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
660 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
664 o=`echo $tail | sed 's/[0-9]*$//'`
665 if test $o != $tail; then
668 # For linux-gnu, try linux-gnu, then linux.
669 o=`echo $tail | sed 's/-.*$//'`
670 if test $o != $tail; then
674 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
677 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
683 # For sparc/sparc32, try sparc/sparc32 and then sparc.
685 tail=$machine${submachine:+/$submachine}
686 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
688 # Prepend the machine's FPU directory unless --without-fp.
689 if test "$with_fp" = yes; then
694 # For each machine term, try it with and then without /multiarch.
695 for try_fpu in $maybe_fpu ''; do
696 for try_multi in $multi_arch_d ''; do
697 mach="$mach /$1$try_fpu$try_multi"
703 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
706 # Find what sysdep directories exist.
709 for b in $base ''; do
710 for m0 in $mach ''; do
711 for v in /$vendor ''; do
712 test "$v" = / && continue
713 for o in /$ostry ''; do
714 test "$o" = / && continue
715 for m in $mach ''; do
716 for d in $add_ons_pfx ''; do
717 for a in $add_ons_sfx ''; do
718 try_suffix="$m0$b$v$o$m"
719 if test -n "$try_suffix"; then
720 try_srcdir="${srcdir}/"
724 try="${d}sysdeps$try_suffix$a"
725 test -n "$enable_debug_configure" &&
726 echo "$0 [DEBUG]: try $try" >&2
727 if test -d "$try_srcdir$try"; then
728 sysnames="$sysnames $try"
729 { test -n "$o" || test -n "$b"; } && os_used=t
730 { test -n "$m" || test -n "$m0"; } && machine_used=t
732 x*/$submachine) submachine_used=t ;;
734 if test -n "$d"; then
735 case "$sysnames_add_ons" in
737 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
750 # If the assembler supports gnu_indirect_function symbol type and the
751 # architecture supports multi-arch, we enable multi-arch by default.
752 case $sysnames_add_ons$sysnames in
756 test x"$multi_arch" = xdefault && multi_arch=no
759 if test x"$multi_arch" != xno; then
760 AC_DEFINE(USE_MULTIARCH)
764 if test -z "$os_used" && test "$os" != none; then
765 AC_MSG_ERROR(Operating system $os is not supported.)
767 if test -z "$machine_used" && test "$machine" != none; then
768 AC_MSG_ERROR(The $machine is not supported.)
770 if test -z "$submachine_used" && test -n "$submachine"; then
771 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
775 # We have now validated the configuration.
777 # Expand the list of system names into a full list of directories
778 # from each element's parent name and Implies file (if present).
781 while test $# -gt 0; do
785 case " $names " in *" $name "*)
786 # Already in the list.
790 # Report each name as we discover it, so there is no long pause in output.
791 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
793 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
797 *) xsrcdir=$srcdir/ ;;
799 test -n "$enable_debug_configure" &&
800 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
802 for implies_file in Implies Implies-before Implies-after; do
803 implies_type=`echo $implies_file | sed s/-/_/`
804 eval ${implies_type}=
805 if test -f $xsrcdir$name/$implies_file; then
806 # Collect more names from the `Implies' file (removing comments).
807 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`"
808 for x in $implied_candidate; do
810 if test -d $xsrcdir$name_base/$x; then
811 eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\""
814 for d in $add_ons_pfx ''; do
818 *) try_srcdir=$srcdir/ ;;
820 test -n "$enable_debug_configure" &&
821 echo "[DEBUG]: $name $implies_file $x try($d) {$try_srcdir}$try" >&2
822 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
824 eval "${implies_type}=\"\$${implies_type} \$try\""
826 case "$sysnames_add_ons" in
828 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
832 if test $found = no; then
833 AC_MSG_WARN($name/$implies_file specifies nonexistent $x)
839 # Add NAME to the list of names.
842 # Find the parent of NAME, using the empty string if it has none.
844 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
847 test -n "$enable_debug_configure" &&
848 echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \
849 Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2
851 # Add the names implied by NAME, and NAME's parent (if it has one), to
852 # the list of names to be processed (the argument list). We prepend the
853 # implied names to the list and append the parent. We want implied
854 # directories to come before further directories inferred from the
855 # configuration components; this ensures that for sysv4, unix/common
856 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
858 sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`"
859 test -n "$sysnames" && set $sysnames
862 # Add the default directories.
863 default_sysnames="sysdeps/generic"
864 sysnames="$names $default_sysnames"
866 # The other names were emitted during the scan.
867 AC_MSG_RESULT($default_sysnames)
869 # Collect the list of add-ons that supply partial sysdeps trees.
871 for add_on in $add_ons; do
874 *) xsrcdir="$srcdir/" ;;
877 test -d "$xsrcdir$add_on/sysdeps" || {
878 case "$configured_add_ons " in
881 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
887 sysdeps_add_ons="$sysdeps_add_ons $add_on"
888 case "$sysnames_add_ons" in
891 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
896 for d in $sysnames; do
898 $add_on/sysdeps/*) ;;
901 (cd "$xsrcdir$d" && for f in *[[!~]]; do
905 test -d "$ff" || { test -e "$ff" && exit 88; }
909 test -d "$f" || { test -e "$f" && exit 88; }
913 if test $? -eq 88; then
918 if test $found = no; then
919 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
922 AC_SUBST(sysdeps_add_ons)
928 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
929 # The makefiles need to use a different form to find it in $srcdir.
930 INSTALL='\$(..)./scripts/install-sh -c'
935 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
937 # Accept binutils 2.20 or newer.
938 AC_CHECK_PROG_VER(AS, $AS, --version,
939 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
940 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as")
941 AC_CHECK_PROG_VER(LD, $LD, --version,
942 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
943 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
945 # These programs are version sensitive.
947 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
948 [version \([egcygnustpi-]*[0-9.]*\)], [4.[3-9].* | 4.[1-9][0-9].* | [5-9].* ],
949 critic_missing="$critic_missing gcc")
950 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
951 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
952 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
954 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
955 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
956 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
957 MSGFMT=: aux_missing="$aux_missing msgfmt")
958 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
959 [GNU texinfo.* \([0-9][0-9.]*\)],
960 [4.[5-9]*|4.[1-9][0-9]*|[5-9].*],
961 MAKEINFO=: aux_missing="$aux_missing makeinfo")
962 AC_CHECK_PROG_VER(SED, sed, --version,
963 [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)],
964 [3.0[2-9]*|3.[1-9]*|[4-9]*],
965 SED=: aux_missing="$aux_missing sed")
966 AC_CHECK_PROG_VER(AWK, gawk, --version,
967 [GNU Awk[^0-9]*\([0-9][0-9.]*\)],
968 [[3-9].*], critic_missing="$critic_missing gawk")
970 AC_CHECK_TOOL(NM, nm, false)
972 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
974 xno|x|x:) AUTOCONF=no ;;
977 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
978 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
979 libc_cv_autoconf_works=yes
981 libc_cv_autoconf_works=no
983 test $libc_cv_autoconf_works = yes || AUTOCONF=no
986 if test "x$AUTOCONF" = xno; then
987 aux_missing="$aux_missing autoconf"
990 test -n "$critic_missing" && AC_MSG_ERROR([
991 *** These critical programs are missing or too old:$critic_missing
992 *** Check the INSTALL file for required versions.])
994 test -n "$aux_missing" && AC_MSG_WARN([
995 *** These auxiliary programs are missing or incompatible versions:$aux_missing
996 *** some features will be disabled.
997 *** Check the INSTALL file for required versions.])
999 # if using special system headers, find out the compiler's sekrit
1000 # header directory and add that to the list. NOTE: Only does the right
1001 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
1002 if test -n "$sysheaders"; then
1003 SYSINCLUDES=-nostdinc
1004 for d in include include-fixed; do
1005 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
1006 SYSINCLUDES="$SYSINCLUDES -isystem $i"
1008 SYSINCLUDES="$SYSINCLUDES \
1009 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
1010 if test -n "$CXX"; then
1012 for cxxheaders in `$CXX -v -S -x c++ /dev/null -o /dev/null 2>&1 \
1013 | sed -n -e '1,/#include/d' -e 's/^ \(\/.*\/[cg]++\)/\1/p'`; do
1014 test "x$cxxheaders" != x &&
1015 CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders"
1019 AC_SUBST(SYSINCLUDES)
1020 AC_SUBST(CXX_SYSINCLUDES)
1022 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1023 # since this would lead to problems installing/building glibc.
1024 # LD_LIBRARY_PATH contains the current directory if one of the following
1026 # - one of the terminals (":" and ";") is the first or last sign
1027 # - two terminals occur directly after each other
1028 # - the path contains an element with a dot in it
1029 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1031 case ${LD_LIBRARY_PATH} in
1032 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1033 ld_library_path_setting="contains current directory"
1036 ld_library_path_setting="ok"
1040 AC_MSG_RESULT($ld_library_path_setting)
1041 if test "$ld_library_path_setting" != "ok"; then
1043 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1044 *** building glibc. Please change the environment variable
1045 *** and run configure again.])
1048 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1049 if $CC -v -static-libgcc 2>&1 | grep 'unrecognized option.*static-libgcc' >/dev/null; then
1050 libc_cv_gcc_static_libgcc=
1052 libc_cv_gcc_static_libgcc=-static-libgcc
1054 AC_SUBST(libc_cv_gcc_static_libgcc)
1056 AC_PATH_PROG(BASH_SHELL, bash, no)
1057 if test "$BASH_SHELL" != no &&
1058 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1059 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1060 libc_cv_have_bash2=yes
1062 libc_cv_have_bash2=no
1064 AC_SUBST(libc_cv_have_bash2)
1066 dnl We need a ksh compatible shell for tzselect.
1067 if test "$BASH_SHELL" = no; then
1068 AC_PATH_PROG(KSH, ksh, no)
1069 if test "$KSH" = no; then
1072 libc_cv_have_ksh=yes
1077 libc_cv_have_ksh=yes
1079 AC_SUBST(libc_cv_have_ksh)
1081 AC_PATH_PROG(PERL, perl, no)
1082 if test "$PERL" != no &&
1083 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1086 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1087 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1088 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1090 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1092 [#define __need_size_t
1093 #define __need_wchar_t
1096 #include <stddef.h>], [size_t size; wchar_t wchar;
1098 #error stddef.h ignored __need_*
1100 if (&size == NULL || &wchar == NULL) abort ();],
1101 libc_cv_friendly_stddef=yes,
1102 libc_cv_friendly_stddef=no)])
1103 if test $libc_cv_friendly_stddef = yes; then
1104 config_vars="$config_vars
1105 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1108 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1109 libc_cv_need_minus_P, [dnl
1110 cat > conftest.S <<EOF
1111 #include "confdefs.h"
1112 /* Nothing whatsoever. */
1114 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1115 libc_cv_need_minus_P=no
1117 libc_cv_need_minus_P=yes
1120 if test $libc_cv_need_minus_P = yes; then
1121 config_vars="$config_vars
1122 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1125 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1126 cat > conftest.s <<EOF
1129 .set glibc_conftest_frobozz,foo
1130 .globl glibc_conftest_frobozz
1132 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1133 # (but it doesn't work), so we must do a linking check to be sure.
1134 cat > conftest1.c <<\EOF
1135 extern int glibc_conftest_frobozz;
1136 void _start() { glibc_conftest_frobozz = 1; }
1138 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1139 -nostartfiles -nostdlib \
1140 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1141 libc_cv_asm_set_directive=yes
1143 libc_cv_asm_set_directive=no
1146 if test $libc_cv_asm_set_directive = yes; then
1147 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1150 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1151 libc_cv_asm_unique_object, [dnl
1152 cat > conftest.s <<EOF
1155 .type _sym, %gnu_unique_object
1157 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1158 libc_cv_asm_unique_object=yes
1160 libc_cv_asm_unique_object=no
1163 if test $libc_cv_asm_unique_object = yes; then
1164 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1167 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1168 [cat > conftest.s <<EOF
1171 .symver _sym,sym@VERS
1173 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1174 libc_cv_asm_symver_directive=yes
1176 libc_cv_asm_symver_directive=no
1179 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1180 if test $libc_cv_asm_symver_directive = yes; then
1181 cat > conftest.s <<EOF
1184 .symver _sym,sym@VERS
1186 cat > conftest.map <<EOF
1195 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1196 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1197 -o conftest.so conftest.o
1198 -nostartfiles -nostdlib
1199 -Wl,--version-script,conftest.map
1200 1>&AS_MESSAGE_LOG_FD]);
1202 libc_cv_ld_version_script_option=yes
1204 libc_cv_ld_version_script_option=no
1207 libc_cv_ld_version_script_option=no
1210 libc_cv_ld_version_script_option=no
1213 if test $shared != no &&
1214 test $libc_cv_asm_symver_directive = yes &&
1215 test $libc_cv_ld_version_script_option = yes &&
1216 test $enable_versioning = yes; then
1218 AC_DEFINE(DO_VERSIONING)
1222 AC_SUBST(VERSIONING)
1224 if test $shared != no && test $VERSIONING = no; then
1226 *** WARNING: You should not compile GNU libc without versioning. Not using
1227 *** versioning will introduce incompatibilities so that old binaries
1228 *** will not run anymore.
1229 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1231 AC_CACHE_CHECK(for .previous assembler directive,
1232 libc_cv_asm_previous_directive, [dnl
1233 cat > conftest.s <<EOF
1234 .section foo_section
1237 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1238 libc_cv_asm_previous_directive=yes
1240 libc_cv_asm_previous_directive=no
1243 if test $libc_cv_asm_previous_directive = yes; then
1244 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1246 AC_CACHE_CHECK(for .popsection assembler directive,
1247 libc_cv_asm_popsection_directive, [dnl
1248 cat > conftest.s <<EOF
1249 .pushsection foo_section
1252 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1253 libc_cv_asm_popsection_directive=yes
1255 libc_cv_asm_popsection_directive=no
1258 if test $libc_cv_asm_popsection_directive = yes; then
1259 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1262 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1263 libc_cv_asm_protected_directive, [dnl
1264 cat > conftest.s <<EOF
1270 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1271 libc_cv_asm_protected_directive=yes
1273 AC_MSG_ERROR(assembler support for symbol visibility is required)
1277 if test $libc_cv_asm_protected_directive = yes; then
1278 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1279 libc_cv_visibility_attribute,
1280 [cat > conftest.c <<EOF
1281 int foo __attribute__ ((visibility ("hidden"))) = 1;
1282 int bar __attribute__ ((visibility ("protected"))) = 1;
1284 libc_cv_visibility_attribute=no
1285 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1286 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1287 if grep '\.protected.*bar' conftest.s >/dev/null; then
1288 libc_cv_visibility_attribute=yes
1292 rm -f conftest.{c,s}
1294 if test $libc_cv_visibility_attribute != yes; then
1295 AC_MSG_ERROR(compiler support for visibility attribute is required)
1299 if test $libc_cv_visibility_attribute = yes; then
1300 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1301 libc_cv_broken_visibility_attribute,
1302 [cat > conftest.c <<EOF
1304 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1305 int bar (int x) { return x; }
1307 libc_cv_broken_visibility_attribute=yes
1308 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1310 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1312 libc_cv_broken_visibility_attribute=no
1315 rm -f conftest.c conftest.s
1317 if test $libc_cv_broken_visibility_attribute = yes; then
1318 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1322 AC_CACHE_CHECK(for broken __attribute__((alias())),
1323 libc_cv_broken_alias_attribute,
1324 [cat > conftest.c <<EOF
1325 extern int foo (int x) __asm ("xyzzy");
1326 int bar (int x) { return x; }
1327 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1329 extern __typeof (dfoo) dfoo __asm ("abccb");
1332 libc_cv_broken_alias_attribute=yes
1333 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1334 if grep 'xyzzy' conftest.s >/dev/null &&
1335 grep 'abccb' conftest.s >/dev/null; then
1336 libc_cv_broken_alias_attribute=no
1339 rm -f conftest.c conftest.s
1341 if test $libc_cv_broken_alias_attribute = yes; then
1342 AC_MSG_ERROR(working alias attribute support required)
1345 if test $libc_cv_visibility_attribute = yes; then
1346 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1347 libc_cv_have_sdata_section,
1348 [echo "int i;" > conftest.c
1349 libc_cv_have_sdata_section=no
1350 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1351 | grep '\.sdata' >/dev/null; then
1352 libc_cv_have_sdata_section=yes
1354 rm -f conftest.c conftest.so
1356 if test $libc_cv_have_sdata_section = yes; then
1357 AC_DEFINE(HAVE_SDATA_SECTION)
1361 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1362 libc_cv_initfini_array, [dnl
1363 LIBC_TRY_LINK_STATIC([
1364 int foo (void) { return 1; }
1365 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1367 [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1368 libc_cv_initfini_array=yes
1370 libc_cv_initfini_array=no
1372 [libc_cv_initfini_array=no])
1374 if test $libc_cv_initfini_array != yes; then
1375 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1378 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1379 libc_cv_ctors_header, [dnl
1380 libc_cv_ctors_header=yes
1381 LIBC_TRY_LINK_STATIC([
1382 __attribute__ ((constructor)) void ctor (void) { asm (""); }
1383 __attribute__ ((destructor)) void dtor (void) { asm (""); }
1386 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1387 { gsub(/\@<:@ */, "@<:@") }
1388 $2 == ".ctors" || $2 == ".dtors" {
1389 size = strtonum("0x" $6)
1390 align = strtonum("0x" $NF)
1392 stub@<:@$2@:>@ = size == align * 2
1395 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1396 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1397 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1399 '], [libc_cv_ctors_header=no])
1401 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1404 if test $libc_cv_ctors_header = no; then
1405 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1408 AC_CACHE_CHECK(for libunwind-support in compiler,
1409 libc_cv_cc_with_libunwind, [
1410 cat > conftest.c <<EOF
1411 int main (void) { return 0; }
1413 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1414 conftest.c -v 2>&1 >/dev/null | grep ' -lunwind ' >/dev/null; then
1415 libc_cv_cc_with_libunwind=yes
1417 libc_cv_cc_with_libunwind=no
1420 AC_SUBST(libc_cv_cc_with_libunwind)
1421 if test $libc_cv_cc_with_libunwind = yes; then
1422 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1425 LIBC_LINKER_FEATURE([-z nodelete], [-Wl,--enable-new-dtags,-z,nodelete],
1426 [libc_cv_z_nodelete=yes],
1427 [AC_MSG_ERROR(linker with -z nodelete support required)])
1429 LIBC_LINKER_FEATURE([-z nodlopen], [-Wl,--enable-new-dtags,-z,nodlopen],
1430 [libc_cv_z_nodlopen=yes],
1431 [AC_MSG_ERROR(linker with -z nodlopen support required)])
1433 LIBC_LINKER_FEATURE([-z initfirst], [-Wl,--enable-new-dtags,-z,initfirst],
1434 [libc_cv_z_initfirst=yes],
1435 [AC_MSG_ERROR(linker with -z initfirst support required)])
1437 # Add-on fragments can set these for other machines.
1438 libc_commonpagesize=${libc_commonpagesize:-no}
1439 libc_relro_required=${libc_relro_required:-no}
1440 case "$base_machine" in
1441 i[[34567]]86 | x86_64 | powerpc* | s390*)
1442 libc_commonpagesize=0x1000
1443 libc_relro_required=yes
1446 libc_commonpagesize=0x2000
1447 libc_relro_required=yes
1451 if test $libc_commonpagesize != no; then
1452 AC_CACHE_CHECK(for -z relro option,
1453 libc_cv_z_relro, [dnl
1455 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1456 int _start (void) { return 42; }
1457 extern void _exit (int);
1458 /* Since these pointers are const, they should go in rodata.
1459 Since they refer to functions that have to be resolved by
1460 dynamic linking, they should instead go in RELRO data. */
1461 const void *const relro[] = { &_start, &_exit, 0 };
1462 /* GNU ld fails to produce RELRO data when it's very small and there is no
1463 normal writable data following it, or if only uninitialized (.bss) data
1464 follows it, or only very small writable data. */
1465 int data[0x10000] = { 1, };
1467 cat > conftest.awk <<\EOF
1470 commonpagesize = strtonum(commonpagesize)
1472 { print "LINE:", $0 > "/dev/stderr" }
1474 vaddr = strtonum($3)
1475 memsz = strtonum($6)
1477 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1478 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1479 result = (end % commonpagesize == 0) ? "yes" : "broken"
1481 END { print result }
1483 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1484 -fPIC -shared -o conftest.so conftest.c
1485 -nostartfiles -nostdlib
1486 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1487 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1489 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1490 conftest.ph > conftest.cps
1492 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1494 if { test "x$libc_relro_required" = xyes &&
1495 test "x$libc_cv_z_relro" != xyes
1498 AC_MSG_ERROR(linker with -z relro support required)
1501 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1504 AC_CACHE_CHECK(for -Bgroup option,
1505 libc_cv_Bgroup, [dnl
1506 cat > conftest.c <<EOF
1507 int _start (void) { return 42; }
1509 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1510 -fPIC -shared -o conftest.so conftest.c
1511 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1518 AC_SUBST(libc_cv_Bgroup)
1521 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1522 libc_cv_as_noexecstack, [dnl
1523 cat > conftest.c <<EOF
1526 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1527 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1528 && grep .note.GNU-stack conftest.s >/dev/null \
1529 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1530 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1532 libc_cv_as_noexecstack=yes
1534 libc_cv_as_noexecstack=no
1537 if test $libc_cv_as_noexecstack = yes; then
1538 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1540 AC_SUBST(ASFLAGS_config)
1542 AC_CACHE_CHECK(for -z combreloc,
1543 libc_cv_z_combreloc, [dnl
1544 cat > conftest.c <<EOF
1545 extern int bar (int);
1547 int foo (void) { return bar (mumble); }
1549 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1550 -fPIC -shared -o conftest.so conftest.c
1551 -nostdlib -nostartfiles
1552 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1554 dnl The following test is a bit weak. We must use a tool which can test
1555 dnl cross-platform since the gcc used can be a cross compiler. Without
1556 dnl introducing new options this is not easily doable. Instead use a tool
1557 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1558 dnl look for a section named .rel.dyn.
1559 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1560 libc_cv_z_combreloc=yes
1562 libc_cv_z_combreloc=no
1565 libc_cv_z_combreloc=no
1568 if test "$libc_cv_z_combreloc" = yes; then
1569 AC_DEFINE(HAVE_Z_COMBRELOC)
1571 AC_SUBST(libc_cv_z_combreloc)
1573 LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack],
1574 [libc_cv_z_execstack=yes], [libc_cv_z_execstack=no])
1575 AC_SUBST(libc_cv_z_execstack)
1577 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1578 LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no])
1581 AC_SUBST(libc_cv_fpie)
1583 AC_CACHE_CHECK(for --hash-style option,
1584 libc_cv_hashstyle, [dnl
1585 cat > conftest.c <<EOF
1586 int _start (void) { return 42; }
1588 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1589 -fPIC -shared -o conftest.so conftest.c
1590 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1592 libc_cv_hashstyle=yes
1594 libc_cv_hashstyle=no
1597 AC_SUBST(libc_cv_hashstyle)
1599 # The linker's default -shared behavior is good enough if it
1600 # does these things that our custom linker scripts ensure that
1601 # all allocated NOTE sections come first.
1602 if test "$use_default_link" = default; then
1603 AC_CACHE_CHECK([for sufficient default -shared layout],
1604 libc_cv_use_default_link, [dnl
1605 libc_cv_use_default_link=no
1606 cat > conftest.s <<\EOF
1607 .section .note.a,"a",%note
1612 .section .note.b,"a",%note
1618 if AC_TRY_COMMAND([dnl
1619 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1620 ac_try=`$READELF -S conftest.so | sed -n \
1622 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1628 libc_seen_a=no libc_seen_b=no
1630 while test $# -ge 2 -a "$1" = NOTE; do
1632 .note.a) libc_seen_a=yes ;;
1633 .note.b) libc_seen_b=yes ;;
1637 case "$libc_seen_a$libc_seen_b" in
1639 libc_cv_use_default_link=yes
1642 echo >&AS_MESSAGE_LOG_FD "\
1643 $libc_seen_a$libc_seen_b from:
1649 use_default_link=$libc_cv_use_default_link
1652 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1653 if libc_cv_output_format=`
1654 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1658 libc_cv_output_format=
1660 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1661 AC_SUBST(libc_cv_output_format)
1663 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1664 cat > conftest.c <<EOF
1667 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1668 conftest.c 1>&AS_MESSAGE_LOG_FD])
1670 libc_cv_fno_toplevel_reorder=yes
1672 libc_cv_fno_toplevel_reorder=no
1675 if test $libc_cv_fno_toplevel_reorder = yes; then
1676 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1678 fno_unit_at_a_time=-fno-unit-at-a-time
1680 AC_SUBST(fno_unit_at_a_time)
1682 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1683 LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
1687 AC_SUBST(libc_cv_ssp)
1689 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1690 cat > conftest.c <<EOF
1692 #ifdef __GNUC_GNU_INLINE__
1693 main () { return 0;}
1698 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1699 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1701 libc_cv_gnu89_inline=yes
1703 libc_cv_gnu89_inline=no
1706 if test $libc_cv_gnu89_inline = yes; then
1707 gnu89_inline=-fgnu89-inline
1711 AC_SUBST(gnu89_inline)
1713 AC_CACHE_CHECK(whether cc puts quotes around section names,
1714 libc_cv_have_section_quotes,
1715 [cat > conftest.c <<EOF
1716 static const int foo
1717 __attribute__ ((section ("bar"))) = 1;
1719 if ${CC-cc} -S conftest.c -o conftest.s; then
1720 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1721 libc_cv_have_section_quotes=yes
1723 libc_cv_have_section_quotes=no
1726 libc_cv_have_section_quotes=unknown
1728 rm -f conftest.{c,s}
1730 if test $libc_cv_have_section_quotes = yes; then
1731 AC_DEFINE(HAVE_SECTION_QUOTES)
1734 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1736 cat > conftest.s <<EOF
1741 .weak bar; bar = foo
1743 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1744 libc_cv_asm_weak_directive=yes
1746 libc_cv_asm_weak_directive=no
1750 if test $libc_cv_asm_weak_directive = no; then
1751 AC_CACHE_CHECK(for assembler .weakext directive,
1752 libc_cv_asm_weakext_directive,
1754 cat > conftest.s <<EOF
1763 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1764 libc_cv_asm_weakext_directive=yes
1766 libc_cv_asm_weakext_directive=no
1772 if test $libc_cv_asm_weak_directive = yes; then
1773 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1774 elif test $libc_cv_asm_weakext_directive = yes; then
1775 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1778 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1780 sparc/sparc64*) cfi_offset=2047;;
1783 cat > conftest.s <<EOF
1785 .type func,%function
1789 .cfi_rel_offset 1, $cfi_offset
1792 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1793 libc_cv_asm_cfi_directives=yes
1795 libc_cv_asm_cfi_directives=no
1798 if test $libc_cv_asm_cfi_directives = yes; then
1799 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1802 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1803 cat > conftest.c <<\EOF
1808 dnl No \ in command here because it ends up inside ''.
1809 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1810 -nostdlib -nostartfiles -Wl,--no-whole-archive
1811 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1812 libc_cv_ld_no_whole_archive=yes
1814 libc_cv_ld_no_whole_archive=no
1817 if test $libc_cv_ld_no_whole_archive = no; then
1818 AC_MSG_ERROR([support for --no-whole-archive is needed])
1821 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1822 cat > conftest.c <<\EOF
1827 dnl No \ in command here because it ends up inside ''.
1828 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1829 -nostdlib -nostartfiles -fexceptions
1830 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1831 libc_cv_gcc_exceptions=yes
1833 libc_cv_gcc_exceptions=no
1836 if test $libc_cv_gcc_exceptions = yes; then
1837 exceptions=-fexceptions
1839 AC_SUBST(exceptions)dnl
1841 if test "$host_cpu" = powerpc ; then
1842 # Check for a bug present in at least versions 2.8.x of GCC
1843 # and versions 1.0.x of EGCS.
1844 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1845 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1846 libc_cv_c_asmcr0_bug='no',
1847 libc_cv_c_asmcr0_bug='yes')])
1848 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1849 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1853 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1854 cat > conftest.c <<\EOF
1857 __builtin_memset (x, 0, 1000);
1861 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1863 libc_cv_gcc_builtin_memset=no
1865 libc_cv_gcc_builtin_memset=yes
1868 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1869 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1872 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1873 cat > conftest.c <<\EOF
1874 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1875 char *foo (const char *a, const char *b)
1877 return __builtin_strstr (a, b);
1881 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1883 libc_cv_gcc_builtin_redirection=yes
1885 libc_cv_gcc_builtin_redirection=no
1888 if test "$libc_cv_gcc_builtin_redirection" = no; then
1889 AC_MSG_ERROR([support for the symbol redirection needed])
1892 dnl Check whether the compiler supports the __thread keyword.
1893 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1894 [cat > conftest.c <<\EOF
1895 __thread int a = 42;
1897 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1898 libc_cv_gcc___thread=yes
1900 libc_cv_gcc___thread=no
1903 if test "$libc_cv_gcc___thread" = no; then
1904 AC_MSG_ERROR([support for the __thread keyword is required])
1907 dnl Check whether the compiler supports the tls_model attribute.
1908 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1909 cat > conftest.c <<\EOF
1910 extern __thread int a __attribute__((tls_model ("initial-exec")));
1912 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1913 libc_cv_gcc_tls_model_attr=yes
1915 libc_cv_gcc_tls_model_attr=no
1918 if test "$libc_cv_gcc_tls_model_attr" = no; then
1919 AC_MSG_ERROR([support for the tls_model attribute is required])
1922 dnl Determine how to disable generation of FMA instructions.
1923 AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions],
1924 libc_cv_cc_nofma, [dnl
1926 for opt in -ffp-contract=off -mno-fused-madd; do
1927 LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break])
1930 if test -n "$submachine"; then
1931 AC_CACHE_CHECK([for compiler option for CPU variant],
1932 libc_cv_cc_submachine, [dnl
1933 libc_cv_cc_submachine=no
1934 for opt in "-march=$submachine" "-mcpu=$submachine"; do
1935 LIBC_TRY_CC_OPTION([$opt], [
1936 libc_cv_cc_submachine="$opt"
1939 if test "x$libc_cv_cc_submachine" = xno; then
1940 AC_MSG_ERROR([${CC-cc} does not support $submachine])
1943 AC_SUBST(libc_cv_cc_submachine)
1945 dnl Check whether we have the gd library available.
1946 AC_MSG_CHECKING(for libgd)
1947 if test "$with_gd" != "no"; then
1948 old_CFLAGS="$CFLAGS"
1949 CFLAGS="$CFLAGS $libgd_include"
1950 old_LDFLAGS="$LDFLAGS"
1951 LDFLAGS="$LDFLAGS $libgd_ldflags"
1953 LIBS="$LIBS -lgd -lpng -lz -lm"
1954 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1955 CFLAGS="$old_CFLAGS"
1956 LDFLAGS="$old_LDFLAGS"
1961 AC_MSG_RESULT($LIBGD)
1965 if test x$with_selinux = xno ; then
1968 # See if we have the SELinux library
1969 AC_CHECK_LIB(selinux, is_selinux_enabled,
1970 have_selinux=yes, have_selinux=no)
1971 # See if we have the SELinux header with the NSCD permissions in it.
1972 if test x$have_selinux = xyes ; then
1973 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
1974 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
1975 [#ifdef NSCD__SHMEMHOST
1978 #error NSCD__SHMEMHOST not defined
1980 have_selinux=yes, have_selinux=no)
1981 AC_MSG_RESULT($have_selinux)
1984 if test x$with_selinux = xyes ; then
1985 if test x$have_selinux = xno ; then
1986 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
1990 # Check if we're building with SELinux support.
1991 if test "x$have_selinux" = xyes; then
1992 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
1994 # See if we have the libaudit library
1995 AC_CHECK_LIB(audit, audit_log_user_avc_message,
1996 have_libaudit=yes, have_libaudit=no)
1997 if test "x$have_libaudit" = xyes; then
1998 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2000 AC_SUBST(have_libaudit)
2002 # See if we have the libcap library
2003 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2004 if test "x$have_libcap" = xyes; then
2005 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2007 AC_SUBST(have_libcap)
2009 AC_SUBST(have_selinux)
2011 dnl check for the size of 'long double'.
2012 AC_CHECK_SIZEOF(long double, 0)
2013 sizeof_long_double=$ac_cv_sizeof_long_double
2014 AC_SUBST(sizeof_long_double)
2017 dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE.
2018 dnl Since we are building the implementations of the fortified functions here,
2019 dnl having the macro defined interacts very badly.
2020 AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source,
2021 [AC_TRY_COMPILE([], [
2022 #ifdef _FORTIFY_SOURCE
2025 [libc_cv_predef_fortify_source=no],
2026 [libc_cv_predef_fortify_source=yes])])
2027 if test $libc_cv_predef_fortify_source = yes; then
2028 CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE"
2032 dnl Check for silly hacked compilers inserting -fstack-protector.
2033 dnl This breaks badly for the early startup code we compile, since
2034 dnl the compiled code can refer to a magic machine-dependent location
2035 dnl for the canary value before we have sufficient setup for that to
2036 dnl work. It's also questionable to build all of libc with this flag
2037 dnl even when you're doing that for most applications you build, since
2038 dnl libc's code is so heavily-used and performance-sensitive. If we
2039 dnl ever really want to make that work, it should be enabled explicitly
2040 dnl in the libc build, not inherited from implicit compiler settings.
2041 AC_CACHE_CHECK([whether $CC implicitly enables -fstack-protector],
2042 libc_cv_predef_stack_protector, [
2043 AC_TRY_COMPILE([extern void foobar (char *);],
2044 [char large_array[2048]; foobar (large_array);], [
2045 libc_undefs=`$NM -u conftest.o |
2046 LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \
2047 2>&AS_MESSAGE_LOG_FD` || {
2048 AC_MSG_ERROR([confusing output from $NM -u])
2050 echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'"
2051 # On some architectures, there are architecture-specific undefined
2052 # symbols (resolved by the linker), so filter out unknown symbols.
2053 # This will fail to produce the correct result if the compiler
2054 # defaults to -fstack-protector but this produces an undefined symbol
2055 # other than __stack_chk_fail. However, compilers like that have not
2056 # been encountered in practice.
2057 libc_undefs=`echo "$libc_undefs" | egrep '^(foobar|__stack_chk_fail)$'`
2058 case "$libc_undefs" in
2059 foobar) libc_cv_predef_stack_protector=no ;;
2061 foobar') libc_cv_predef_stack_protector=yes ;;
2062 *) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;;
2064 [AC_MSG_ERROR([test compilation failed])])
2067 if test $libc_cv_predef_stack_protector = yes; then
2068 libc_extra_cflags=-fno-stack-protector
2070 AC_SUBST(libc_extra_cflags)
2072 ### End of automated tests.
2073 ### Now run sysdeps configure fragments.
2075 # They also can set these variables.
2077 ldd_rewrite_script=no
2078 libc_cv_sysconfdir=$sysconfdir
2079 libc_cv_localstatedir=$localstatedir
2080 libc_cv_gcc_unwind_find_fde=no
2083 # Iterate over all the sysdep directories we will use, running their
2084 # configure fragments.
2085 for dir in $sysnames; do
2088 *) dest=$srcdir/$dir ;;
2090 if test -r $dest/configure; then
2091 AC_MSG_RESULT(running configure fragment for $dir)
2096 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2097 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2099 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2101 # A sysdeps configure fragment can reset this if IFUNC is not actually
2102 # usable even though the assembler knows how to generate the symbol type.
2103 if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then
2104 AC_DEFINE(HAVE_IFUNC)
2107 # This is far from the AC_ARG_ENABLE that sets it so that a sysdeps
2108 # configure fragment can override the value to prevent this AC_DEFINE.
2110 if test "x$use_nscd" != xno; then
2111 AC_DEFINE([USE_NSCD])
2113 if test "x$build_nscd" = xdefault; then
2114 build_nscd=$use_nscd
2117 # Test for old glibc 2.0.x headers so that they can be removed properly
2118 # Search only in includedir.
2119 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2120 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2122 old_glibc_headers=yes
2124 old_glibc_headers=no
2126 AC_MSG_RESULT($old_glibc_headers)
2127 if test ${old_glibc_headers} = yes; then
2128 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2129 AC_MSG_WARN(*** be removed.)
2131 AC_SUBST(old_glibc_headers)
2133 AC_SUBST(libc_cv_slibdir)
2134 AC_SUBST(libc_cv_localedir)
2135 AC_SUBST(libc_cv_sysconfdir)
2136 AC_SUBST(libc_cv_localstatedir)
2137 AC_SUBST(libc_cv_rootsbindir)
2138 AC_SUBST(libc_cv_forced_unwind)
2140 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2141 AC_SUBST(libc_cv_cc_sse4)
2142 AC_SUBST(libc_cv_cc_avx)
2143 AC_SUBST(libc_cv_cc_sse2avx)
2144 AC_SUBST(libc_cv_cc_novzeroupper)
2145 AC_SUBST(libc_cv_cc_fma4)
2146 AC_SUBST(libc_cv_cc_nofma)
2147 AC_SUBST(libc_cv_as_i686)
2148 AC_SUBST(libc_cv_sparc_as_vis3)
2150 if test x$use_ldconfig = xyes; then
2151 AC_DEFINE(USE_LDCONFIG)
2153 AC_SUBST(use_ldconfig)
2154 AC_SUBST(ldd_rewrite_script)
2159 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2160 [libc_cv_pic_default=yes
2161 cat > conftest.c <<EOF
2162 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2163 # error PIC is default.
2166 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2167 libc_cv_pic_default=no
2170 AC_SUBST(libc_cv_pic_default)
2173 AC_SUBST(static_nss)
2177 dnl See sysdeps/mach/configure.in for this variable.
2178 AC_SUBST(mach_interface_list)
2180 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2181 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2185 AC_CONFIG_FILES([config.make Makefile])
2186 AC_CONFIG_COMMANDS([default],[[
2187 case $CONFIG_FILES in *config.make*)
2188 echo "$config_vars" >> config.make;;
2190 test -d bits || mkdir bits]],[[config_vars='$config_vars']])