1 dnl Process this file with autoconf to produce a configure script.
2 AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required.
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 # Glibc should not depend on any header files
9 AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS],
10 [m4_divert_text([DEFAULTS],
11 [ac_includes_default='/* none */'])])
13 dnl This is here so we can set $subdirs directly based on configure fragments.
19 if test $host != $build; then
20 AC_CHECK_PROGS(BUILD_CC, gcc cc)
22 AC_SUBST(cross_compiling)
24 # We need the C++ compiler only for testing.
27 if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
28 AC_MSG_ERROR([you must configure in a separate build directory])
31 # This will get text that should go into config.make.
34 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
36 AC_HELP_STRING([--with-gd=DIR],
37 [find libgd include dir and library with prefix DIR]),
41 *) libgd_include="-I$withval/include"
42 libgd_ldflags="-L$withval/lib" ;;
45 AC_ARG_WITH([gd-include],
46 AC_HELP_STRING([--with-gd-include=DIR],
47 [find libgd include files in DIR]),
49 case "$with_gd_include" in
51 *) libgd_include="-I$withval" ;;
55 AC_HELP_STRING([--with-gd-lib=DIR],
56 [find libgd library files in DIR]),
58 case "$with_gd_lib" in
60 *) libgd_ldflags="-L$withval" ;;
64 if test -n "$libgd_include"; then
65 config_vars="$config_vars
66 CFLAGS-memusagestat.c = $libgd_include"
68 if test -n "$libgd_ldflags"; then
69 config_vars="$config_vars
70 libgd-LDFLAGS = $libgd_ldflags"
73 dnl Arguments to specify presence of other packages/features.
75 AC_HELP_STRING([--with-fp],
76 [if using floating-point hardware @<:@default=yes@:>@]),
80 AC_ARG_WITH([binutils],
81 AC_HELP_STRING([--with-binutils=PATH],
82 [specify location of binutils (as and ld)]),
83 [path_binutils=$withval],
85 AC_ARG_WITH([selinux],
86 AC_HELP_STRING([--with-selinux],
87 [if building with SELinux support]),
88 [with_selinux=$withval],
91 AC_ARG_WITH([headers],
92 AC_HELP_STRING([--with-headers=PATH],
93 [location of system headers to use
94 (for example /usr/src/linux/include)
95 @<:@default=compiler default@:>@]),
96 [sysheaders=$withval],
100 AC_SUBST(use_default_link)
101 AC_ARG_WITH([default-link],
102 AC_HELP_STRING([--with-default-link],
103 [do not use explicit linker scripts]),
104 [use_default_link=$withval],
105 [use_default_link=default])
107 AC_ARG_ENABLE([sanity-checks],
108 AC_HELP_STRING([--disable-sanity-checks],
109 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
110 [enable_sanity=$enableval],
113 AC_ARG_ENABLE([shared],
114 AC_HELP_STRING([--enable-shared],
115 [build shared library @<:@default=yes if GNU ld@:>@]),
118 AC_ARG_ENABLE([profile],
119 AC_HELP_STRING([--enable-profile],
120 [build profiled library @<:@default=no@:>@]),
121 [profile=$enableval],
123 AC_ARG_ENABLE([versioning],
124 AC_HELP_STRING([--disable-versioning],
125 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
126 [enable_versioning=$enableval],
127 [enable_versioning=yes])
129 AC_ARG_ENABLE([oldest-abi],
130 AC_HELP_STRING([--enable-oldest-abi=ABI],
131 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
132 [oldest_abi=$enableval],
134 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
137 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
141 AC_ARG_ENABLE([stackguard-randomization],
142 AC_HELP_STRING([--enable-stackguard-randomization],
143 [initialize __stack_chk_guard canary with a random number at program start]),
144 [enable_stackguard_randomize=$enableval],
145 [enable_stackguard_randomize=no])
146 if test "$enable_stackguard_randomize" = yes; then
147 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
150 dnl Generic infrastructure for drop-in additions to libc.
151 AC_ARG_ENABLE([add-ons],
152 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
153 [configure and build add-ons in DIR1,DIR2,...
154 search for add-ons if no parameter given]),
155 , [enable_add_ons=yes])
157 AC_ARG_ENABLE([hidden-plt],
158 AC_HELP_STRING([--disable-hidden-plt],
159 [do not hide internal function calls to avoid PLT]),
162 if test "x$hidden" = xno; then
166 AC_ARG_ENABLE([bind-now],
167 AC_HELP_STRING([--enable-bind-now],
168 [disable lazy relocations in DSOs]),
169 [bindnow=$enableval],
173 dnl On some platforms we cannot use dynamic loading. We must provide
174 dnl static NSS modules.
175 AC_ARG_ENABLE([static-nss],
176 AC_HELP_STRING([--enable-static-nss],
177 [build static NSS modules @<:@default=no@:>@]),
178 [static_nss=$enableval],
180 dnl Enable static NSS also if we build no shared objects.
181 if test x"$static_nss" = xyes || test x"$shared" = xno; then
183 AC_DEFINE(DO_STATIC_NSS)
186 AC_ARG_ENABLE([force-install],
187 AC_HELP_STRING([--disable-force-install],
188 [don't force installation of files from this package, even if they are older than the installed files]),
189 [force_install=$enableval],
191 AC_SUBST(force_install)
193 dnl On some platforms we allow dropping compatibility with all kernel
195 AC_ARG_ENABLE([kernel],
196 AC_HELP_STRING([--enable-kernel=VERSION],
197 [compile for compatibility with kernel not older than VERSION]),
198 [minimum_kernel=$enableval],
200 dnl Prevent unreasonable values.
201 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
202 # Better nothing than this.
205 if test "$minimum_kernel" = current; then
206 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
210 dnl For the development we sometimes want gcc to issue even more warnings.
211 dnl This is not the default since many of the extra warnings are not
213 AC_ARG_ENABLE([all-warnings],
214 AC_HELP_STRING([--enable-all-warnings],
215 [enable all useful warnings gcc can issue]),
216 [all_warnings=$enableval],
218 AC_SUBST(all_warnings)
220 AC_ARG_ENABLE([multi-arch],
221 AC_HELP_STRING([--enable-multi-arch],
222 [enable single DSO with optimizations for multiple architectures]),
223 [multi_arch=$enableval],
224 [multi_arch=default])
226 AC_ARG_ENABLE([nss-crypt],
227 AC_HELP_STRING([--enable-nss-crypt],
228 [enable libcrypt to use nss]),
229 [nss_crypt=$enableval],
231 if test x$nss_crypt = xyes; then
232 nss_includes=-I$(nss-config --includedir 2>/dev/null)
233 if test $? -ne 0; then
234 AC_MSG_ERROR([cannot find include directory with nss-config])
237 CFLAGS="$CFLAGS $nss_includes"
238 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
240 #include <nsslowhash.h>
241 void f (void) { NSSLOW_Init (); }])],
242 libc_cv_nss_crypt=yes,
244 cannot find NSS headers with lowlevel hash function interfaces]))
246 LIBS="$LIBS -lfreebl3"
247 AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
249 #include <nsslowhash.h>],
251 libc_cv_nss_crypt=yes,
253 cannot link program using lowlevel NSS hash functions]))
259 AC_SUBST(libc_cv_nss_crypt)
262 AC_ARG_ENABLE([obsolete-rpc],
263 AC_HELP_STRING([--enable-obsolete-rpc],
264 [build and install the obsolete RPC code for link-time usage]),
265 [link_obsolete_rpc=$enableval],
266 [link_obsolete_rpc=no])
267 AC_SUBST(link_obsolete_rpc)
269 if test "$link_obsolete_rpc" = yes; then
270 AC_DEFINE(LINK_OBSOLETE_RPC)
273 AC_ARG_ENABLE([systemtap],
274 [AS_HELP_STRING([--enable-systemtap],
275 [enable systemtap static probe points @<:@default=no@:>@])],
276 [systemtap=$enableval],
278 if test "x$systemtap" != xno; then
279 AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl
281 CFLAGS="-std=gnu99 $CFLAGS"
282 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h>
283 void foo (int i, void *p)
285 asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) ""
286 :: STAP_PROBE_ASM_OPERANDS (2, i, p));
287 }]])], [libc_cv_sdt=yes], [libc_cv_sdt=no])
288 CFLAGS="$old_CFLAGS"])
289 if test $libc_cv_sdt = yes; then
290 AC_DEFINE([USE_STAP_PROBE])
291 elif test "x$systemtap" != xauto; then
292 AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support])
296 # Note the use of $use_nscd is near the bottom of the file.
297 AC_ARG_ENABLE([nscd],
298 [AS_HELP_STRING([--disable-nscd],
299 [library functions will not contact the nscd daemon])],
300 [use_nscd=$enableval],
303 # The way shlib-versions is used to generate soversions.mk uses a
304 # fairly simplistic model for name recognition that can't distinguish
305 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
306 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
307 # tell. This doesn't get used much beyond that, so it's fairly safe.
312 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
316 # We keep the original values in `$config_*' and never modify them, so we
317 # can write them unchanged into config.make. Everything else uses
318 # $machine, $vendor, and $os, and changes them whenever convenient.
319 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
321 # Don't allow vendor == "unknown"
322 test "$config_vendor" = unknown && config_vendor=
323 config_os="`echo $config_os | sed 's/^unknown-//'`"
325 # Some configurations imply other options.
328 # The configure fragment of an add-on port can modify these to supplement
329 # or override the table in the case statement below. No fragment should
330 # ever change the config_* variables, however.
331 machine=$config_machine
332 vendor=$config_vendor
336 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
338 if test "$machine" = rs6000; then
342 # Braindead PowerPC box with absolutely no FPU.
343 case "$machine-$host_os" in
351 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
354 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
356 *) submachine="$withval" ;;
360 dnl Let sysdeps/*/preconfigure act here, like they can in add-ons.
361 LIBC_PRECONFIGURE([$srcdir], [for sysdeps])
363 # An add-on can set this when it wants to disable the sanity check below.
366 dnl Having this here, though empty, makes sure that if add-ons' fragments
367 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
368 dnl our AC_OUTPUT will actually use it.
371 case "$enable_add_ons" in
374 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
375 sed 's@/[[^/]]*$@@' | sort | uniq`
376 add_ons_automatic=yes
378 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
379 add_ons_automatic=no ;;
385 if test x"$add_ons" != x; then
386 for f in $add_ons; do
391 *** It seems that you're using an old \`crypt' add-on. crypt is now
392 *** part of glibc and using the old add-on will not work with this
393 *** release. Start again with fresh sources and without the old
394 *** \`crypt' add-on.])
398 *** It seems that you're using an old \`localedata' add-on. localedata
399 *** is now part of glibc and using the old add-on will not work with
400 *** this release. Start again with fresh sources and without the old
401 *** \`localedata' add-on.])
406 # Now source each add-on's configure fragment.
407 # The fragments can use $srcdir/$libc_add_on to find themselves,
408 # and test $add_ons_automatic to see if they were explicitly requested.
409 # A fragment can clear (or even change) $libc_add_on to affect
410 # whether it goes into the list to be actually used in the build.
412 for libc_add_on in $add_ons; do
413 # Test whether such a directory really exists.
414 # It can be absolute, or relative to $srcdir, or relative to the build dir.
415 case "$libc_add_on" in
417 libc_add_on_srcdir=$libc_add_on
420 test -d "$srcdir/$libc_add_on" || {
421 if test -d "$libc_add_on"; then
422 libc_add_on="`pwd`/$libc_add_on"
424 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
427 libc_add_on_srcdir=$srcdir/$libc_add_on
431 libc_add_on_frag=$libc_add_on_srcdir/configure
432 libc_add_on_canonical=
433 libc_add_on_config_subdirs=
434 if test -r "$libc_add_on_frag"; then
435 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
436 libc_add_on_canonical=unknown
438 . "$libc_add_on_frag"
439 test -z "$libc_add_on" || {
440 configured_add_ons="$configured_add_ons $libc_add_on"
441 if test "x$libc_add_on_canonical" = xunknown; then
442 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
444 for d in $libc_add_on_subdirs; do
445 case "$libc_add_on" in
446 /*) subdir_srcdir="$libc_add_on" ;;
447 *) subdir_srcdir="\$(..)$libc_add_on" ;;
451 d="${libc_add_on_canonical:-$libc_add_on}"
457 subdir_srcdir="$subdir_srcdir/$d"
460 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
461 add_on_subdirs="$add_on_subdirs $d"
462 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
463 $d-srcdir = $subdir_srcdir"
465 for d in $libc_add_on_config_subdirs; do
468 fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
470 if test ! -d "$libc_add_on_srcdir/$d"; then
471 AC_MSG_ERROR(fragment wants to configure missing directory $d)
473 case "$libc_add_on" in
475 relative path required for add-on using \$libc_add_on_config_subdirs) ;;
477 subdirs="$subdirs $libc_add_on/$d"
481 if test -n "$libc_add_on"; then
482 LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for])
483 use_add_ons="$use_add_ons $libc_add_on"
484 add_ons_pfx="$add_ons_pfx $libc_add_on/"
485 test -z "$libc_add_on_canonical" ||
486 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
489 # Use echo to strip excess whitespace.
490 add_ons="`echo $use_add_ons`"
493 AC_SUBST(add_on_subdirs)
497 ### I put this here to prevent those annoying emails from people who cannot
498 ### read and try to compile glibc on unsupported platforms. --drepper
500 ### By using the undocumented --enable-hacker-mode option for configure
501 ### one can skip this test to make the configuration not fail for unsupported
504 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
505 case "$machine-$host_os" in
509 echo "*** The GNU C library is currently not available for this platform."
510 echo "*** So far nobody cared to port it and if there is no volunteer it"
511 echo "*** might never happen. So, if you have interest to see glibc on"
512 echo "*** this platform visit"
513 echo "*** http://www.gnu.org/software/libc/porting.html"
514 echo "*** and join the group of porters"
520 dnl We need to use [ and ] for other purposes for a while now.
522 # Expand the configuration machine name into a subdirectory by architecture
523 # type and particular chip. If an add-on configure fragment already set
524 # base_machine, we don't change it.
525 test -n "$base_machine" || case "$machine" in
526 i[34567]86) base_machine=i386 machine=i386/$machine ;;
527 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
528 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
529 s390) base_machine=s390 machine=s390/s390-32 ;;
530 s390x) base_machine=s390 machine=s390/s390-64 ;;
531 sh3*) base_machine=sh machine=sh/sh3 ;;
532 sh4*) base_machine=sh machine=sh/sh4 ;;
534 base_machine=sparc machine=sparc/sparc32 ;;
535 sparcv8 | supersparc | hypersparc)
536 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
537 sparcv8plus | sparcv8plusa | sparcv9)
538 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
539 sparcv8plusb | sparcv9b)
540 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
542 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
544 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
546 base_machine=sparc machine=sparc/sparc64 ;;
548 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
550 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
552 base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
553 *) base_machine=$machine ;;
556 AC_SUBST(base_machine)
558 if test "$base_machine" = "i386"; then
559 AC_DEFINE(USE_REGPARMS)
562 # For the multi-arch option we need support in the assembler.
563 AC_CACHE_CHECK([for assembler gnu_indirect_function symbol type support],
564 libc_cv_asm_gnu_indirect_function, [dnl
565 cat > conftest.s <<EOF
566 .type foo,%gnu_indirect_function
568 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD;
570 libc_cv_asm_gnu_indirect_function=yes
572 libc_cv_asm_gnu_indirect_function=no
576 AC_MSG_CHECKING(whether .text pseudo-op must be used)
577 AC_CACHE_VAL(libc_cv_dot_text, [dnl
578 cat > conftest.s <<EOF
582 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
583 libc_cv_dot_text=.text
586 if test -z "$libc_cv_dot_text"; then
592 if test x"$libc_cv_asm_gnu_indirect_function" != xyes; then
593 if test x"$multi_arch" = xyes; then
594 AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
599 if test x"$multi_arch" != xno; then
600 multi_arch_d=/multiarch
603 # Compute the list of sysdep directories for this configuration.
604 # This can take a while to compute.
605 sysdep_dir=$srcdir/sysdeps
606 AC_MSG_CHECKING(sysdep dirs)
607 dnl We need to use [ and ] for other purposes for a while now.
609 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
610 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
612 test "x$base_os" != x || case "$os" in
619 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
622 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
626 o=`echo $tail | sed 's/[0-9]*$//'`
627 if test $o != $tail; then
630 # For linux-gnu, try linux-gnu, then linux.
631 o=`echo $tail | sed 's/-.*$//'`
632 if test $o != $tail; then
636 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
639 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
645 # For sparc/sparc32, try sparc/sparc32 and then sparc.
647 tail=$machine${submachine:+/$submachine}
648 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
650 # Prepend the machine's FPU directory unless --without-fp.
651 if test "$with_fp" = yes; then
654 mach="$mach /$1/nofpu"
660 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
663 # Find what sysdep directories exist.
666 for b in $base ''; do
667 for m0 in $mach ''; do
668 for v in /$vendor ''; do
669 test "$v" = / && continue
670 for o in /$ostry ''; do
671 test "$o" = / && continue
672 for m in $multi_arch_d $mach ''; do
673 for d in $add_ons_pfx ''; do
674 for a in $add_ons_sfx ''; do
675 if test -n "$m0$m0sub$b$v$o$m$msub"; then
676 try_srcdir="${srcdir}/"
680 try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
681 test -n "$enable_debug_configure" &&
682 echo "$0 [DEBUG]: try $try" >&2
683 if test -d "$try_srcdir$try"; then
684 sysnames="$sysnames $try"
685 { test -n "$o" || test -n "$b"; } && os_used=t
686 { test -n "$m" || test -n "$m0"; } && machine_used=t
688 x*/$submachine) submachine_used=t ;;
690 if test -n "$d"; then
691 case "$sysnames_add_ons" in
693 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
706 # If the assembler supports gnu_indirect_function symbol type and the
707 # architecture supports multi-arch, we enable multi-arch by default.
708 case $sysnames_add_ons$sysnames in
712 test x"$multi_arch" = xdefault && multi_arch=no
715 if test x"$multi_arch" != xno; then
716 AC_DEFINE(USE_MULTIARCH)
720 if test -z "$os_used" && test "$os" != none; then
721 AC_MSG_ERROR(Operating system $os is not supported.)
723 if test -z "$machine_used" && test "$machine" != none; then
724 AC_MSG_ERROR(The $machine is not supported.)
726 if test -z "$submachine_used" && test -n "$submachine"; then
727 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
731 # We have now validated the configuration.
733 # Expand the list of system names into a full list of directories
734 # from each element's parent name and Implies file (if present).
737 while test $# -gt 0; do
741 case " $names " in *" $name "*)
742 # Already in the list.
746 # Report each name as we discover it, so there is no long pause in output.
747 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
749 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
753 *) xsrcdir=$srcdir/ ;;
755 test -n "$enable_debug_configure" &&
756 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
758 for implies_file in Implies Implies-before Implies-after; do
759 implies_type=`echo $implies_file | sed s/-/_/`
760 eval ${implies_type}=
761 if test -f $xsrcdir$name/$implies_file; then
762 # Collect more names from the `Implies' file (removing comments).
763 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`"
764 for x in $implied_candidate; do
766 if test -d $xsrcdir$name_base/$x; then
767 eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\""
770 for d in $add_ons_pfx ''; do
774 *) try_srcdir=$srcdir/ ;;
776 test -n "$enable_debug_configure" &&
777 echo "[DEBUG]: $name $implies_file $x try($d) {$try_srcdir}$try" >&2
778 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
780 eval "${implies_type}=\"\$${implies_type} \$try\""
782 case "$sysnames_add_ons" in
784 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
788 if test $found = no; then
789 AC_MSG_WARN($name/$implies_file specifies nonexistent $x)
795 # Add NAME to the list of names.
798 # Find the parent of NAME, using the empty string if it has none.
800 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
803 test -n "$enable_debug_configure" &&
804 echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \
805 Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2
807 # Add the names implied by NAME, and NAME's parent (if it has one), to
808 # the list of names to be processed (the argument list). We prepend the
809 # implied names to the list and append the parent. We want implied
810 # directories to come before further directories inferred from the
811 # configuration components; this ensures that for sysv4, unix/common
812 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
814 sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`"
815 test -n "$sysnames" && set $sysnames
818 # Add the default directories.
819 default_sysnames="sysdeps/generic"
820 sysnames="$names $default_sysnames"
822 # The other names were emitted during the scan.
823 AC_MSG_RESULT($default_sysnames)
825 # Collect the list of add-ons that supply partial sysdeps trees.
827 for add_on in $add_ons; do
830 *) xsrcdir="$srcdir/" ;;
833 test -d "$xsrcdir$add_on/sysdeps" || {
834 case "$configured_add_ons " in
837 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
843 sysdeps_add_ons="$sysdeps_add_ons $add_on"
844 case "$sysnames_add_ons" in
847 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
852 for d in $sysnames; do
854 $add_on/sysdeps/*) ;;
857 (cd "$xsrcdir$d" && for f in *[[!~]]; do
861 test -d "$ff" || { test -e "$ff" && exit 88; }
865 test -d "$f" || { test -e "$f" && exit 88; }
869 if test $? -eq 88; then
874 if test $found = no; then
875 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
878 AC_SUBST(sysdeps_add_ons)
884 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
885 # The makefiles need to use a different form to find it in $srcdir.
886 INSTALL='\$(..)./scripts/install-sh -c'
891 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
893 # Accept binutils 2.20 or newer.
894 AC_CHECK_PROG_VER(AS, $AS, --version,
895 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
896 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as")
897 AC_CHECK_PROG_VER(LD, $LD, --version,
898 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
899 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
901 # These programs are version sensitive.
903 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
904 [version \([egcygnustpi-]*[0-9.]*\)], [4.[3-9].* | 4.[1-9][0-9].* | [5-9].* ],
905 critic_missing="$critic_missing gcc")
906 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
907 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
908 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
910 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
911 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
912 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
913 MSGFMT=: aux_missing="$aux_missing msgfmt")
914 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
915 [GNU texinfo.* \([0-9][0-9.]*\)],
916 [4.[5-9]*|4.[1-9][0-9]*|[5-9].*],
917 MAKEINFO=: aux_missing="$aux_missing makeinfo")
918 AC_CHECK_PROG_VER(SED, sed, --version,
919 [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)],
920 [3.0[2-9]*|3.[1-9]*|[4-9]*],
921 SED=: aux_missing="$aux_missing sed")
923 AC_CHECK_TOOL(READELF, readelf, false)
924 AC_CHECK_TOOL(NM, nm, false)
926 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
928 xno|x|x:) AUTOCONF=no ;;
931 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
932 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
933 libc_cv_autoconf_works=yes
935 libc_cv_autoconf_works=no
937 test $libc_cv_autoconf_works = yes || AUTOCONF=no
940 if test "x$AUTOCONF" = xno; then
941 aux_missing="$aux_missing autoconf"
944 test -n "$critic_missing" && AC_MSG_ERROR([
945 *** These critical programs are missing or too old:$critic_missing
946 *** Check the INSTALL file for required versions.])
948 test -n "$aux_missing" && AC_MSG_WARN([
949 *** These auxiliary programs are missing or incompatible versions:$aux_missing
950 *** some features will be disabled.
951 *** Check the INSTALL file for required versions.])
953 # if using special system headers, find out the compiler's sekrit
954 # header directory and add that to the list. NOTE: Only does the right
955 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
956 if test -n "$sysheaders"; then
957 SYSINCLUDES=-nostdinc
958 for d in include include-fixed; do
959 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
960 SYSINCLUDES="$SYSINCLUDES -isystem $i"
962 SYSINCLUDES="$SYSINCLUDES \
963 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
964 if test -n "$CXX"; then
966 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
967 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
968 for d in include "$cxxmachine/include"; do
969 i=../../../../$d/c++/$cxxversion
970 cxxheaders=`$CXX -print-file-name="$i"` &&
971 test "x$cxxheaders" != x && test "x$i" != "x$cxxheaders" &&
972 CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders \
973 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
977 AC_SUBST(SYSINCLUDES)
978 AC_SUBST(CXX_SYSINCLUDES)
980 # Test if LD_LIBRARY_PATH contains the notation for the current directory
981 # since this would lead to problems installing/building glibc.
982 # LD_LIBRARY_PATH contains the current directory if one of the following
984 # - one of the terminals (":" and ";") is the first or last sign
985 # - two terminals occur directly after each other
986 # - the path contains an element with a dot in it
987 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
989 case ${LD_LIBRARY_PATH} in
990 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
991 ld_library_path_setting="contains current directory"
994 ld_library_path_setting="ok"
998 AC_MSG_RESULT($ld_library_path_setting)
999 if test "$ld_library_path_setting" != "ok"; then
1001 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1002 *** building glibc. Please change the environment variable
1003 *** and run configure again.])
1006 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1007 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
1008 libc_cv_gcc_static_libgcc=
1010 libc_cv_gcc_static_libgcc=-static-libgcc
1012 AC_SUBST(libc_cv_gcc_static_libgcc)
1014 AC_PATH_PROG(BASH_SHELL, bash, no)
1015 if test "$BASH_SHELL" != no &&
1016 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1017 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1018 libc_cv_have_bash2=yes
1020 libc_cv_have_bash2=no
1022 AC_SUBST(libc_cv_have_bash2)
1024 dnl We need a ksh compatible shell for tzselect.
1025 if test "$BASH_SHELL" = no; then
1026 AC_PATH_PROG(KSH, ksh, no)
1027 if test "$KSH" = no; then
1030 libc_cv_have_ksh=yes
1035 libc_cv_have_ksh=yes
1037 AC_SUBST(libc_cv_have_ksh)
1040 AC_PATH_PROG(PERL, perl, no)
1041 if test "$PERL" != no &&
1042 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1045 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1046 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1047 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1049 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1051 [#define __need_size_t
1052 #define __need_wchar_t
1055 #include <stddef.h>], [size_t size; wchar_t wchar;
1057 #error stddef.h ignored __need_*
1059 if (&size == NULL || &wchar == NULL) abort ();],
1060 libc_cv_friendly_stddef=yes,
1061 libc_cv_friendly_stddef=no)])
1062 if test $libc_cv_friendly_stddef = yes; then
1063 config_vars="$config_vars
1064 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1067 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1068 libc_cv_need_minus_P, [dnl
1069 cat > conftest.S <<EOF
1070 #include "confdefs.h"
1071 /* Nothing whatsoever. */
1073 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1074 libc_cv_need_minus_P=no
1076 libc_cv_need_minus_P=yes
1079 if test $libc_cv_need_minus_P = yes; then
1080 config_vars="$config_vars
1081 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1084 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1085 cat > conftest.s <<EOF
1088 .set glibc_conftest_frobozz,foo
1089 .globl glibc_conftest_frobozz
1091 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1092 # (but it doesn't work), so we must do a linking check to be sure.
1093 cat > conftest1.c <<\EOF
1094 extern int glibc_conftest_frobozz;
1095 void _start() { glibc_conftest_frobozz = 1; }
1097 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1098 -nostartfiles -nostdlib \
1099 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1100 libc_cv_asm_set_directive=yes
1102 libc_cv_asm_set_directive=no
1105 if test $libc_cv_asm_set_directive = yes; then
1106 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1109 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1110 libc_cv_asm_unique_object, [dnl
1111 cat > conftest.s <<EOF
1114 .type _sym, %gnu_unique_object
1116 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1117 libc_cv_asm_unique_object=yes
1119 libc_cv_asm_unique_object=no
1122 if test $libc_cv_asm_unique_object = yes; then
1123 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1126 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1127 [cat > conftest.s <<EOF
1130 .symver _sym,sym@VERS
1132 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1133 libc_cv_asm_symver_directive=yes
1135 libc_cv_asm_symver_directive=no
1138 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1139 if test $libc_cv_asm_symver_directive = yes; then
1140 cat > conftest.s <<EOF
1143 .symver _sym,sym@VERS
1145 cat > conftest.map <<EOF
1154 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1155 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1156 -o conftest.so conftest.o
1157 -nostartfiles -nostdlib
1158 -Wl,--version-script,conftest.map
1159 1>&AS_MESSAGE_LOG_FD]);
1161 libc_cv_ld_version_script_option=yes
1163 libc_cv_ld_version_script_option=no
1166 libc_cv_ld_version_script_option=no
1169 libc_cv_ld_version_script_option=no
1172 if test $shared != no &&
1173 test $libc_cv_asm_symver_directive = yes &&
1174 test $libc_cv_ld_version_script_option = yes &&
1175 test $enable_versioning = yes; then
1177 AC_DEFINE(DO_VERSIONING)
1181 AC_SUBST(VERSIONING)
1183 if test $shared != no && test $VERSIONING = no; then
1185 *** WARNING: You should not compile GNU libc without versioning. Not using
1186 *** versioning will introduce incompatibilities so that old binaries
1187 *** will not run anymore.
1188 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1190 AC_CACHE_CHECK(for .previous assembler directive,
1191 libc_cv_asm_previous_directive, [dnl
1192 cat > conftest.s <<EOF
1193 .section foo_section
1196 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1197 libc_cv_asm_previous_directive=yes
1199 libc_cv_asm_previous_directive=no
1202 if test $libc_cv_asm_previous_directive = yes; then
1203 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1205 AC_CACHE_CHECK(for .popsection assembler directive,
1206 libc_cv_asm_popsection_directive, [dnl
1207 cat > conftest.s <<EOF
1208 .pushsection foo_section
1211 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1212 libc_cv_asm_popsection_directive=yes
1214 libc_cv_asm_popsection_directive=no
1217 if test $libc_cv_asm_popsection_directive = yes; then
1218 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1221 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1222 libc_cv_asm_protected_directive, [dnl
1223 cat > conftest.s <<EOF
1229 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1230 libc_cv_asm_protected_directive=yes
1232 AC_MSG_ERROR(assembler support for symbol visibility is required)
1236 if test $libc_cv_asm_protected_directive = yes; then
1237 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1238 libc_cv_visibility_attribute,
1239 [cat > conftest.c <<EOF
1240 int foo __attribute__ ((visibility ("hidden"))) = 1;
1241 int bar __attribute__ ((visibility ("protected"))) = 1;
1243 libc_cv_visibility_attribute=no
1244 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1245 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1246 if grep '\.protected.*bar' conftest.s >/dev/null; then
1247 libc_cv_visibility_attribute=yes
1251 rm -f conftest.{c,s}
1253 if test $libc_cv_visibility_attribute != yes; then
1254 AC_MSG_ERROR(compiler support for visibility attribute is required)
1258 if test $libc_cv_visibility_attribute = yes; then
1259 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1260 libc_cv_broken_visibility_attribute,
1261 [cat > conftest.c <<EOF
1263 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1264 int bar (int x) { return x; }
1266 libc_cv_broken_visibility_attribute=yes
1267 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1269 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1271 libc_cv_broken_visibility_attribute=no
1274 rm -f conftest.c conftest.s
1276 if test $libc_cv_broken_visibility_attribute = yes; then
1277 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1281 AC_CACHE_CHECK(for broken __attribute__((alias())),
1282 libc_cv_broken_alias_attribute,
1283 [cat > conftest.c <<EOF
1284 extern int foo (int x) __asm ("xyzzy");
1285 int bar (int x) { return x; }
1286 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1288 extern __typeof (dfoo) dfoo __asm ("abccb");
1291 libc_cv_broken_alias_attribute=yes
1292 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1293 if grep 'xyzzy' conftest.s >/dev/null &&
1294 grep 'abccb' conftest.s >/dev/null; then
1295 libc_cv_broken_alias_attribute=no
1298 rm -f conftest.c conftest.s
1300 if test $libc_cv_broken_alias_attribute = yes; then
1301 AC_MSG_ERROR(working alias attribute support required)
1304 if test $libc_cv_visibility_attribute = yes; then
1305 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1306 libc_cv_have_sdata_section,
1307 [echo "int i;" > conftest.c
1308 libc_cv_have_sdata_section=no
1309 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1310 | grep '\.sdata' >/dev/null; then
1311 libc_cv_have_sdata_section=yes
1313 rm -f conftest.c conftest.so
1315 if test $libc_cv_have_sdata_section = yes; then
1316 AC_DEFINE(HAVE_SDATA_SECTION)
1320 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1321 libc_cv_initfini_array, [dnl
1322 LIBC_TRY_LINK_STATIC([
1323 int foo (void) { return 1; }
1324 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1326 [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1327 libc_cv_initfini_array=yes
1329 libc_cv_initfini_array=no
1331 [libc_cv_initfini_array=no])
1333 if test $libc_cv_initfini_array != yes; then
1334 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1337 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1338 libc_cv_ctors_header, [dnl
1339 libc_cv_ctors_header=yes
1340 LIBC_TRY_LINK_STATIC([
1341 __attribute__ ((constructor)) void ctor (void) { asm (""); }
1342 __attribute__ ((destructor)) void dtor (void) { asm (""); }
1345 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1346 { gsub(/\@<:@ */, "@<:@") }
1347 $2 == ".ctors" || $2 == ".dtors" {
1348 size = strtonum("0x" $6)
1349 align = strtonum("0x" $NF)
1351 stub@<:@$2@:>@ = size == align * 2
1354 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1355 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1356 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1358 '], [libc_cv_ctors_header=no])
1360 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1363 if test $libc_cv_ctors_header = no; then
1364 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1367 AC_CACHE_CHECK(for libunwind-support in compiler,
1368 libc_cv_cc_with_libunwind, [
1369 cat > conftest.c <<EOF
1370 int main (void) { return 0; }
1372 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1373 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1374 libc_cv_cc_with_libunwind=yes
1376 libc_cv_cc_with_libunwind=no
1379 AC_SUBST(libc_cv_cc_with_libunwind)
1380 if test $libc_cv_cc_with_libunwind = yes; then
1381 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1384 AC_CACHE_CHECK(for -z nodelete option,
1385 libc_cv_z_nodelete, [dnl
1386 cat > conftest.c <<EOF
1387 int _start (void) { return 42; }
1389 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1390 -fPIC -shared -o conftest.so conftest.c
1391 -nostartfiles -nostdlib
1392 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1394 libc_cv_z_nodelete=yes
1396 AC_MSG_ERROR(linker with -z nodelete support required)
1400 AC_CACHE_CHECK(for -z nodlopen option,
1401 libc_cv_z_nodlopen, [dnl
1402 cat > conftest.c <<EOF
1403 int _start (void) { return 42; }
1405 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1406 -fPIC -shared -o conftest.so conftest.c
1407 -nostartfiles -nostdlib
1408 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1410 libc_cv_z_nodlopen=yes
1412 AC_MSG_ERROR(linker with -z nodlopen support required)
1416 AC_CACHE_CHECK(for -z initfirst option,
1417 libc_cv_z_initfirst, [dnl
1418 cat > conftest.c <<EOF
1419 int _start (void) { return 42; }
1421 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1422 -fPIC -shared -o conftest.so conftest.c
1423 -nostartfiles -nostdlib
1424 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1426 libc_cv_z_initfirst=yes
1428 AC_MSG_ERROR(linker with -z initfirst support required)
1432 # Add-on fragments can set these for other machines.
1433 libc_commonpagesize=${libc_commonpagesize:-no}
1434 libc_relro_required=${libc_relro_required:-no}
1435 case "$base_machine" in
1436 i[[34567]]86 | x86_64 | powerpc* | s390*)
1437 libc_commonpagesize=0x1000
1438 libc_relro_required=yes
1441 libc_commonpagesize=0x2000
1442 libc_relro_required=yes
1446 if test $libc_commonpagesize != no; then
1447 AC_CACHE_CHECK(for -z relro option,
1448 libc_cv_z_relro, [dnl
1450 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1451 int _start (void) { return 42; }
1452 extern void _exit (int);
1453 /* Since these pointers are const, they should go in rodata.
1454 Since they refer to functions that have to be resolved by
1455 dynamic linking, they should instead go in RELRO data. */
1456 const void *const relro[] = { &_start, &_exit, 0 };
1457 /* GNU ld fails to produce RELRO data when it's very small and there is no
1458 normal writable data following it, or if only uninitialized (.bss) data
1459 follows it, or only very small writable data. */
1460 int data[0x10000] = { 1, };
1462 cat > conftest.awk <<\EOF
1465 commonpagesize = strtonum(commonpagesize)
1467 { print "LINE:", $0 > "/dev/stderr" }
1469 vaddr = strtonum($3)
1470 memsz = strtonum($6)
1472 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1473 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1474 result = (end % commonpagesize == 0) ? "yes" : "broken"
1476 END { print result }
1478 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1479 -fPIC -shared -o conftest.so conftest.c
1480 -nostartfiles -nostdlib
1481 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1482 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1484 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1485 conftest.ph > conftest.cps
1487 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1489 if { test "x$libc_relro_required" = xyes &&
1490 test "x$libc_cv_z_relro" != xyes
1493 AC_MSG_ERROR(linker with -z relro support required)
1496 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1499 AC_CACHE_CHECK(for -Bgroup option,
1500 libc_cv_Bgroup, [dnl
1501 cat > conftest.c <<EOF
1502 int _start (void) { return 42; }
1504 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1505 -fPIC -shared -o conftest.so conftest.c
1506 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1513 AC_SUBST(libc_cv_Bgroup)
1516 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1517 libc_cv_as_noexecstack, [dnl
1518 cat > conftest.c <<EOF
1521 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1522 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1523 && grep -q .note.GNU-stack conftest.s \
1524 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1525 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1527 libc_cv_as_noexecstack=yes
1529 libc_cv_as_noexecstack=no
1532 if test $libc_cv_as_noexecstack = yes; then
1533 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1535 AC_SUBST(ASFLAGS_config)
1537 AC_CACHE_CHECK(for -z combreloc,
1538 libc_cv_z_combreloc, [dnl
1539 cat > conftest.c <<EOF
1540 extern int bar (int);
1542 int foo (void) { return bar (mumble); }
1544 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1545 -fPIC -shared -o conftest.so conftest.c
1546 -nostdlib -nostartfiles
1547 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1549 dnl The following test is a bit weak. We must use a tool which can test
1550 dnl cross-platform since the gcc used can be a cross compiler. Without
1551 dnl introducing new options this is not easily doable. Instead use a tool
1552 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1553 dnl look for a section named .rel.dyn.
1554 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1555 libc_cv_z_combreloc=yes
1557 libc_cv_z_combreloc=no
1560 libc_cv_z_combreloc=no
1563 if test "$libc_cv_z_combreloc" = yes; then
1564 AC_DEFINE(HAVE_Z_COMBRELOC)
1566 AC_SUBST(libc_cv_z_combreloc)
1568 AC_CACHE_CHECK(for -z execstack,
1569 libc_cv_z_execstack, [dnl
1570 cat > conftest.c <<EOF
1571 int _start (void) { return 42; }
1573 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1574 -fPIC -shared -o conftest.so conftest.c
1575 -Wl,-z,execstack -nostdlib
1576 1>&AS_MESSAGE_LOG_FD])
1578 libc_cv_z_execstack=yes
1580 libc_cv_z_execstack=no
1583 AC_SUBST(libc_cv_z_execstack)
1585 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1586 LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no])
1589 AC_SUBST(libc_cv_fpie)
1591 AC_CACHE_CHECK(for --hash-style option,
1592 libc_cv_hashstyle, [dnl
1593 cat > conftest.c <<EOF
1594 int _start (void) { return 42; }
1596 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1597 -fPIC -shared -o conftest.so conftest.c
1598 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1600 libc_cv_hashstyle=yes
1602 libc_cv_hashstyle=no
1605 AC_SUBST(libc_cv_hashstyle)
1607 # The linker's default -shared behavior is good enough if it
1608 # does these things that our custom linker scripts ensure that
1609 # all allocated NOTE sections come first.
1610 if test "$use_default_link" = default; then
1611 AC_CACHE_CHECK([for sufficient default -shared layout],
1612 libc_cv_use_default_link, [dnl
1613 libc_cv_use_default_link=no
1614 cat > conftest.s <<\EOF
1615 .section .note.a,"a",%note
1620 .section .note.b,"a",%note
1626 if AC_TRY_COMMAND([dnl
1627 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1628 ac_try=`$READELF -S conftest.so | sed -n \
1630 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1636 libc_seen_a=no libc_seen_b=no
1638 while test $# -ge 2 -a "$1" = NOTE; do
1640 .note.a) libc_seen_a=yes ;;
1641 .note.b) libc_seen_b=yes ;;
1645 case "$libc_seen_a$libc_seen_b" in
1647 libc_cv_use_default_link=yes
1650 echo >&AS_MESSAGE_LOG_FD "\
1651 $libc_seen_a$libc_seen_b from:
1657 use_default_link=$libc_cv_use_default_link
1660 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1661 if libc_cv_output_format=`
1662 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1666 libc_cv_output_format=
1668 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1669 AC_SUBST(libc_cv_output_format)
1671 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1672 cat > conftest.c <<EOF
1675 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1676 conftest.c 1>&AS_MESSAGE_LOG_FD])
1678 libc_cv_fno_toplevel_reorder=yes
1680 libc_cv_fno_toplevel_reorder=no
1683 if test $libc_cv_fno_toplevel_reorder = yes; then
1684 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1686 fno_unit_at_a_time=-fno-unit-at-a-time
1688 AC_SUBST(fno_unit_at_a_time)
1690 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1691 LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
1695 AC_SUBST(libc_cv_ssp)
1697 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1698 cat > conftest.c <<EOF
1700 #ifdef __GNUC_GNU_INLINE__
1701 main () { return 0;}
1706 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1707 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1709 libc_cv_gnu89_inline=yes
1711 libc_cv_gnu89_inline=no
1714 if test $libc_cv_gnu89_inline = yes; then
1715 gnu89_inline=-fgnu89-inline
1719 AC_SUBST(gnu89_inline)
1721 AC_CACHE_CHECK(whether cc puts quotes around section names,
1722 libc_cv_have_section_quotes,
1723 [cat > conftest.c <<EOF
1724 static const int foo
1725 __attribute__ ((section ("bar"))) = 1;
1727 if ${CC-cc} -S conftest.c -o conftest.s; then
1728 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1729 libc_cv_have_section_quotes=yes
1731 libc_cv_have_section_quotes=no
1734 libc_cv_have_section_quotes=unknown
1736 rm -f conftest.{c,s}
1738 if test $libc_cv_have_section_quotes = yes; then
1739 AC_DEFINE(HAVE_SECTION_QUOTES)
1742 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1744 cat > conftest.s <<EOF
1749 .weak bar; bar = foo
1751 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1752 libc_cv_asm_weak_directive=yes
1754 libc_cv_asm_weak_directive=no
1758 if test $libc_cv_asm_weak_directive = no; then
1759 AC_CACHE_CHECK(for assembler .weakext directive,
1760 libc_cv_asm_weakext_directive,
1762 cat > conftest.s <<EOF
1771 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1772 libc_cv_asm_weakext_directive=yes
1774 libc_cv_asm_weakext_directive=no
1780 if test $libc_cv_asm_weak_directive = yes; then
1781 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1782 elif test $libc_cv_asm_weakext_directive = yes; then
1783 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1786 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1788 sparc/sparc64*) cfi_offset=2047;;
1791 cat > conftest.s <<EOF
1793 .type func,%function
1797 .cfi_rel_offset 1, $cfi_offset
1800 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1801 libc_cv_asm_cfi_directives=yes
1803 libc_cv_asm_cfi_directives=no
1806 if test $libc_cv_asm_cfi_directives = yes; then
1807 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1810 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1811 cat > conftest.c <<\EOF
1816 dnl No \ in command here because it ends up inside ''.
1817 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1818 -nostdlib -nostartfiles -Wl,--no-whole-archive
1819 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1820 libc_cv_ld_no_whole_archive=yes
1822 libc_cv_ld_no_whole_archive=no
1825 if test $libc_cv_ld_no_whole_archive = no; then
1826 AC_MSG_ERROR([support for --no-whole-archive is needed])
1829 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1830 cat > conftest.c <<\EOF
1835 dnl No \ in command here because it ends up inside ''.
1836 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1837 -nostdlib -nostartfiles -fexceptions
1838 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1839 libc_cv_gcc_exceptions=yes
1841 libc_cv_gcc_exceptions=no
1844 if test $libc_cv_gcc_exceptions = yes; then
1845 exceptions=-fexceptions
1847 AC_SUBST(exceptions)dnl
1849 if test "$host_cpu" = powerpc ; then
1850 # Check for a bug present in at least versions 2.8.x of GCC
1851 # and versions 1.0.x of EGCS.
1852 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1853 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1854 libc_cv_c_asmcr0_bug='no',
1855 libc_cv_c_asmcr0_bug='yes')])
1856 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1857 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1861 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1862 cat > conftest.c <<\EOF
1865 __builtin_memset (x, 0, 1000);
1869 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1871 libc_cv_gcc_builtin_memset=no
1873 libc_cv_gcc_builtin_memset=yes
1876 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1877 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1880 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1881 cat > conftest.c <<\EOF
1882 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1883 char *foo (const char *a, const char *b)
1885 return __builtin_strstr (a, b);
1889 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1891 libc_cv_gcc_builtin_redirection=yes
1893 libc_cv_gcc_builtin_redirection=no
1896 if test "$libc_cv_gcc_builtin_redirection" = no; then
1897 AC_MSG_ERROR([support for the symbol redirection needed])
1900 dnl Check whether the compiler supports the __thread keyword.
1901 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1902 [cat > conftest.c <<\EOF
1903 __thread int a = 42;
1905 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1906 libc_cv_gcc___thread=yes
1908 libc_cv_gcc___thread=no
1911 if test "$libc_cv_gcc___thread" = no; then
1912 AC_MSG_ERROR([support for the __thread keyword is required])
1915 dnl Check whether the compiler supports the tls_model attribute.
1916 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1917 cat > conftest.c <<\EOF
1918 extern __thread int a __attribute__((tls_model ("initial-exec")));
1920 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1921 libc_cv_gcc_tls_model_attr=yes
1923 libc_cv_gcc_tls_model_attr=no
1926 if test "$libc_cv_gcc_tls_model_attr" = no; then
1927 AC_MSG_ERROR([support for the tls_model attribute is required])
1930 dnl Determine how to disable generation of FMA instructions.
1931 AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions],
1932 libc_cv_cc_nofma, [dnl
1934 for opt in -ffp-contract=off -mno-fused-madd; do
1935 LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break])
1938 if test -n "$submachine"; then
1939 AC_CACHE_CHECK([for compiler option for CPU variant],
1940 libc_cv_cc_submachine, [dnl
1941 libc_cv_cc_submachine=no
1942 for opt in "-march=$submachine" "-mcpu=$submachine"; do
1943 LIBC_TRY_CC_OPTION([$opt], [
1944 libc_cv_cc_submachine="$opt"
1947 if test "x$libc_cv_cc_submachine" = xno; then
1948 AC_MSG_ERROR([${CC-cc} does not support $submachine])
1951 AC_SUBST(libc_cv_cc_submachine)
1953 dnl Check whether we have the gd library available.
1954 AC_MSG_CHECKING(for libgd)
1955 if test "$with_gd" != "no"; then
1956 old_CFLAGS="$CFLAGS"
1957 CFLAGS="$CFLAGS $libgd_include"
1958 old_LDFLAGS="$LDFLAGS"
1959 LDFLAGS="$LDFLAGS $libgd_ldflags"
1961 LIBS="$LIBS -lgd -lpng -lz -lm"
1962 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1963 CFLAGS="$old_CFLAGS"
1964 LDFLAGS="$old_LDFLAGS"
1969 AC_MSG_RESULT($LIBGD)
1973 if test x$with_selinux = xno ; then
1976 # See if we have the SELinux library
1977 AC_CHECK_LIB(selinux, is_selinux_enabled,
1978 have_selinux=yes, have_selinux=no)
1979 # See if we have the SELinux header with the NSCD permissions in it.
1980 if test x$have_selinux = xyes ; then
1981 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
1982 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
1983 [#ifdef NSCD__SHMEMHOST
1986 #error NSCD__SHMEMHOST not defined
1988 have_selinux=yes, have_selinux=no)
1989 AC_MSG_RESULT($have_selinux)
1992 if test x$with_selinux = xyes ; then
1993 if test x$have_selinux = xno ; then
1994 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
1998 # Check if we're building with SELinux support.
1999 if test "x$have_selinux" = xyes; then
2000 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2002 # See if we have the libaudit library
2003 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2004 have_libaudit=yes, have_libaudit=no)
2005 if test "x$have_libaudit" = xyes; then
2006 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2008 AC_SUBST(have_libaudit)
2010 # See if we have the libcap library
2011 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2012 if test "x$have_libcap" = xyes; then
2013 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2015 AC_SUBST(have_libcap)
2017 AC_SUBST(have_selinux)
2019 dnl check for the size of 'long double'.
2020 AC_CHECK_SIZEOF(long double, 0)
2021 sizeof_long_double=$ac_cv_sizeof_long_double
2022 AC_SUBST(sizeof_long_double)
2025 dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE.
2026 dnl Since we are building the implementations of the fortified functions here,
2027 dnl having the macro defined interacts very badly.
2028 AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source,
2029 [AC_TRY_COMPILE([], [
2030 #ifdef _FORTIFY_SOURCE
2033 [libc_cv_predef_fortify_source=no],
2034 [libc_cv_predef_fortify_source=yes])])
2035 if test $libc_cv_predef_fortify_source = yes; then
2036 CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE"
2040 dnl Check for silly hacked compilers inserting -fstack-protector.
2041 dnl This breaks badly for the early startup code we compile, since
2042 dnl the compiled code can refer to a magic machine-dependent location
2043 dnl for the canary value before we have sufficient setup for that to
2044 dnl work. It's also questionable to build all of libc with this flag
2045 dnl even when you're doing that for most applications you build, since
2046 dnl libc's code is so heavily-used and performance-sensitive. If we
2047 dnl ever really want to make that work, it should be enabled explicitly
2048 dnl in the libc build, not inherited from implicit compiler settings.
2049 AC_CACHE_CHECK([whether $CC implicitly enables -fstack-protector],
2050 libc_cv_predef_stack_protector, [
2051 AC_TRY_COMPILE([extern void foobar (char *);],
2052 [char large_array[2048]; foobar (large_array);], [
2053 libc_undefs=`$NM -u conftest.o |
2054 LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \
2055 2>&AS_MESSAGE_LOG_FD` || {
2056 AC_MSG_ERROR([confusing output from $NM -u])
2058 echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'"
2059 # On some architectures, there are architecture-specific undefined
2060 # symbols (resolved by the linker), so filter out unknown symbols.
2061 # This will fail to produce the correct result if the compiler
2062 # defaults to -fstack-protector but this produces an undefined symbol
2063 # other than __stack_chk_fail. However, compilers like that have not
2064 # been encountered in practice.
2065 libc_undefs=`echo "$libc_undefs" | egrep '^(foobar|__stack_chk_fail)$'`
2066 case "$libc_undefs" in
2067 foobar) libc_cv_predef_stack_protector=no ;;
2069 foobar') libc_cv_predef_stack_protector=yes ;;
2070 *) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;;
2072 [AC_MSG_ERROR([test compilation failed])])
2075 if test $libc_cv_predef_stack_protector = yes; then
2076 libc_extra_cflags=-fno-stack-protector
2078 AC_SUBST(libc_extra_cflags)
2080 ### End of automated tests.
2081 ### Now run sysdeps configure fragments.
2083 # They also can set these variables.
2085 ldd_rewrite_script=no
2086 libc_cv_sysconfdir=$sysconfdir
2087 libc_cv_localstatedir=$localstatedir
2088 libc_cv_gcc_unwind_find_fde=no
2091 # Iterate over all the sysdep directories we will use, running their
2092 # configure fragments.
2093 for dir in $sysnames; do
2096 *) dest=$srcdir/$dir ;;
2098 if test -r $dest/configure; then
2099 AC_MSG_RESULT(running configure fragment for $dir)
2104 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2105 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2107 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2109 # This is far from the AC_ARG_ENABLE that sets it so that a sysdeps
2110 # configure fragment can override the value to prevent this AC_DEFINE.
2112 if test "x$use_nscd" != xno; then
2113 AC_DEFINE([USE_NSCD])
2116 # Test for old glibc 2.0.x headers so that they can be removed properly
2117 # Search only in includedir.
2118 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2119 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2121 old_glibc_headers=yes
2123 old_glibc_headers=no
2125 AC_MSG_RESULT($old_glibc_headers)
2126 if test ${old_glibc_headers} = yes; then
2127 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2128 AC_MSG_WARN(*** be removed.)
2130 AC_SUBST(old_glibc_headers)
2132 AC_SUBST(libc_cv_slibdir)
2133 AC_SUBST(libc_cv_localedir)
2134 AC_SUBST(libc_cv_sysconfdir)
2135 AC_SUBST(libc_cv_localstatedir)
2136 AC_SUBST(libc_cv_rootsbindir)
2137 AC_SUBST(libc_cv_forced_unwind)
2139 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2140 AC_SUBST(libc_cv_cpp_asm_debuginfo)
2141 AC_SUBST(libc_cv_cc_sse4)
2142 AC_SUBST(libc_cv_cc_avx)
2143 AC_SUBST(libc_cv_cc_sse2avx)
2144 AC_SUBST(libc_cv_cc_novzeroupper)
2145 AC_SUBST(libc_cv_cc_fma4)
2146 AC_SUBST(libc_cv_cc_nofma)
2147 AC_SUBST(libc_cv_as_i686)
2148 AC_SUBST(libc_cv_sparc_as_vis3)
2150 AC_SUBST(use_ldconfig)
2151 AC_SUBST(ldd_rewrite_script)
2156 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2157 [libc_cv_pic_default=yes
2158 cat > conftest.c <<EOF
2159 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2160 # error PIC is default.
2163 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2164 libc_cv_pic_default=no
2167 AC_SUBST(libc_cv_pic_default)
2170 AC_SUBST(static_nss)
2174 dnl See sysdeps/mach/configure.in for this variable.
2175 AC_SUBST(mach_interface_list)
2177 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2180 config_makefile=Makefile
2183 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2184 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2188 AC_CONFIG_FILES([config.make ${config_makefile}])
2189 AC_CONFIG_COMMANDS([default],[[
2190 case $CONFIG_FILES in *config.make*)
2191 echo "$config_vars" >> config.make;;
2193 test -d bits || mkdir bits]],[[config_vars='$config_vars']])