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([stackguard-randomization],
150 AC_HELP_STRING([--enable-stackguard-randomization],
151 [initialize __stack_chk_guard canary with a random number at program start]),
152 [enable_stackguard_randomize=$enableval],
153 [enable_stackguard_randomize=no])
154 if test "$enable_stackguard_randomize" = yes; then
155 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
158 dnl Generic infrastructure for drop-in additions to libc.
159 AC_ARG_ENABLE([add-ons],
160 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
161 [configure and build add-ons in DIR1,DIR2,...
162 search for add-ons if no parameter given]),
163 , [enable_add_ons=yes])
165 AC_ARG_ENABLE([hidden-plt],
166 AC_HELP_STRING([--disable-hidden-plt],
167 [do not hide internal function calls to avoid PLT]),
170 if test "x$hidden" = xno; then
174 AC_ARG_ENABLE([bind-now],
175 AC_HELP_STRING([--enable-bind-now],
176 [disable lazy relocations in DSOs]),
177 [bindnow=$enableval],
181 dnl On some platforms we cannot use dynamic loading. We must provide
182 dnl static NSS modules.
183 AC_ARG_ENABLE([static-nss],
184 AC_HELP_STRING([--enable-static-nss],
185 [build static NSS modules @<:@default=no@:>@]),
186 [static_nss=$enableval],
188 dnl Enable static NSS also if we build no shared objects.
189 if test x"$static_nss" = xyes || test x"$shared" = xno; then
191 AC_DEFINE(DO_STATIC_NSS)
194 AC_ARG_ENABLE([force-install],
195 AC_HELP_STRING([--disable-force-install],
196 [don't force installation of files from this package, even if they are older than the installed files]),
197 [force_install=$enableval],
199 AC_SUBST(force_install)
201 dnl On some platforms we allow dropping compatibility with all kernel
203 AC_ARG_ENABLE([kernel],
204 AC_HELP_STRING([--enable-kernel=VERSION],
205 [compile for compatibility with kernel not older than VERSION]),
206 [minimum_kernel=$enableval],
208 dnl Prevent unreasonable values.
209 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
210 # Better nothing than this.
213 if test "$minimum_kernel" = current; then
214 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
218 dnl For the development we sometimes want gcc to issue even more warnings.
219 dnl This is not the default since many of the extra warnings are not
221 AC_ARG_ENABLE([all-warnings],
222 AC_HELP_STRING([--enable-all-warnings],
223 [enable all useful warnings gcc can issue]),
224 [all_warnings=$enableval],
226 AC_SUBST(all_warnings)
228 AC_ARG_ENABLE([multi-arch],
229 AC_HELP_STRING([--enable-multi-arch],
230 [enable single DSO with optimizations for multiple architectures]),
231 [multi_arch=$enableval],
232 [multi_arch=default])
234 AC_ARG_ENABLE([nss-crypt],
235 AC_HELP_STRING([--enable-nss-crypt],
236 [enable libcrypt to use nss]),
237 [nss_crypt=$enableval],
239 if test x$nss_crypt = xyes; then
240 nss_includes=-I$(nss-config --includedir 2>/dev/null)
241 if test $? -ne 0; then
242 AC_MSG_ERROR([cannot find include directory with nss-config])
245 CFLAGS="$CFLAGS $nss_includes"
246 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
248 #include <nsslowhash.h>
249 void f (void) { NSSLOW_Init (); }])],
250 libc_cv_nss_crypt=yes,
252 cannot find NSS headers with lowlevel hash function interfaces]))
254 LIBS="$LIBS -lfreebl3"
255 AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
257 #include <nsslowhash.h>],
259 libc_cv_nss_crypt=yes,
261 cannot link program using lowlevel NSS hash functions]))
267 AC_SUBST(libc_cv_nss_crypt)
270 AC_ARG_ENABLE([obsolete-rpc],
271 AC_HELP_STRING([--enable-obsolete-rpc],
272 [build and install the obsolete RPC code for link-time usage]),
273 [link_obsolete_rpc=$enableval],
274 [link_obsolete_rpc=no])
275 AC_SUBST(link_obsolete_rpc)
277 if test "$link_obsolete_rpc" = yes; then
278 AC_DEFINE(LINK_OBSOLETE_RPC)
281 AC_ARG_ENABLE([systemtap],
282 [AS_HELP_STRING([--enable-systemtap],
283 [enable systemtap static probe points @<:@default=no@:>@])],
284 [systemtap=$enableval],
286 if test "x$systemtap" != xno; then
287 AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl
289 CFLAGS="-std=gnu99 $CFLAGS"
290 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h>
291 void foo (int i, void *p)
293 asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) ""
294 :: STAP_PROBE_ASM_OPERANDS (2, i, p));
295 }]])], [libc_cv_sdt=yes], [libc_cv_sdt=no])
296 CFLAGS="$old_CFLAGS"])
297 if test $libc_cv_sdt = yes; then
298 AC_DEFINE([USE_STAP_PROBE])
299 elif test "x$systemtap" != xauto; then
300 AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support])
304 AC_ARG_ENABLE([build-nscd],
305 [AS_HELP_STRING([--disable-build-nscd],
306 [disable building and installing the nscd daemon])],
307 [build_nscd=$enableval],
308 [build_nscd=default])
311 # Note the use of $use_nscd is near the bottom of the file.
312 AC_ARG_ENABLE([nscd],
313 [AS_HELP_STRING([--disable-nscd],
314 [library functions will not contact the nscd daemon])],
315 [use_nscd=$enableval],
318 # The way shlib-versions is used to generate soversions.mk uses a
319 # fairly simplistic model for name recognition that can't distinguish
320 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
321 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
322 # tell. This doesn't get used much beyond that, so it's fairly safe.
327 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
331 # We keep the original values in `$config_*' and never modify them, so we
332 # can write them unchanged into config.make. Everything else uses
333 # $machine, $vendor, and $os, and changes them whenever convenient.
334 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
336 # Don't allow vendor == "unknown"
337 test "$config_vendor" = unknown && config_vendor=
338 config_os="`echo $config_os | sed 's/^unknown-//'`"
340 # Some configurations imply other options.
343 # The configure fragment of an add-on port can modify these to supplement
344 # or override the table in the case statement below. No fragment should
345 # ever change the config_* variables, however.
346 machine=$config_machine
347 vendor=$config_vendor
351 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
353 if test "$machine" = rs6000; then
357 # Braindead PowerPC box with absolutely no FPU.
358 case "$machine-$host_os" in
366 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
369 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
371 *) submachine="$withval" ;;
375 dnl Let sysdeps/*/preconfigure act here, like they can in add-ons.
376 LIBC_PRECONFIGURE([$srcdir], [for sysdeps])
378 # An add-on can set this when it wants to disable the sanity check below.
381 dnl Having this here, though empty, makes sure that if add-ons' fragments
382 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
383 dnl our AC_OUTPUT will actually use it.
386 case "$enable_add_ons" in
389 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
390 sed 's@/[[^/]]*$@@' | sort | uniq`
391 add_ons_automatic=yes
393 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
394 add_ons_automatic=no ;;
400 if test x"$add_ons" != x; then
401 for f in $add_ons; do
406 *** It seems that you're using an old \`crypt' add-on. crypt is now
407 *** part of glibc and using the old add-on will not work with this
408 *** release. Start again with fresh sources and without the old
409 *** \`crypt' add-on.])
413 *** It seems that you're using an old \`localedata' add-on. localedata
414 *** is now part of glibc and using the old add-on will not work with
415 *** this release. Start again with fresh sources and without the old
416 *** \`localedata' add-on.])
421 # Now source each add-on's configure fragment.
422 # The fragments can use $srcdir/$libc_add_on to find themselves,
423 # and test $add_ons_automatic to see if they were explicitly requested.
424 # A fragment can clear (or even change) $libc_add_on to affect
425 # whether it goes into the list to be actually used in the build.
427 for libc_add_on in $add_ons; do
428 # Test whether such a directory really exists.
429 # It can be absolute, or relative to $srcdir, or relative to the build dir.
430 case "$libc_add_on" in
432 libc_add_on_srcdir=$libc_add_on
435 test -d "$srcdir/$libc_add_on" || {
436 if test -d "$libc_add_on"; then
437 libc_add_on="`pwd`/$libc_add_on"
439 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
442 libc_add_on_srcdir=$srcdir/$libc_add_on
446 libc_add_on_frag=$libc_add_on_srcdir/configure
447 libc_add_on_canonical=
448 libc_add_on_config_subdirs=
449 if test -r "$libc_add_on_frag"; then
450 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
451 libc_add_on_canonical=unknown
453 . "$libc_add_on_frag"
454 test -z "$libc_add_on" || {
455 configured_add_ons="$configured_add_ons $libc_add_on"
456 if test "x$libc_add_on_canonical" = xunknown; then
457 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
459 for d in $libc_add_on_subdirs; do
460 case "$libc_add_on" in
461 /*) subdir_srcdir="$libc_add_on" ;;
462 *) subdir_srcdir="\$(..)$libc_add_on" ;;
466 d="${libc_add_on_canonical:-$libc_add_on}"
472 subdir_srcdir="$subdir_srcdir/$d"
475 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
476 add_on_subdirs="$add_on_subdirs $d"
477 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
478 $d-srcdir = $subdir_srcdir"
480 for d in $libc_add_on_config_subdirs; do
483 fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
485 if test ! -d "$libc_add_on_srcdir/$d"; then
486 AC_MSG_ERROR(fragment wants to configure missing directory $d)
488 case "$libc_add_on" in
490 relative path required for add-on using \$libc_add_on_config_subdirs) ;;
492 subdirs="$subdirs $libc_add_on/$d"
496 if test -n "$libc_add_on"; then
497 LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for])
498 use_add_ons="$use_add_ons $libc_add_on"
499 add_ons_pfx="$add_ons_pfx $libc_add_on/"
500 test -z "$libc_add_on_canonical" ||
501 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
504 # Use echo to strip excess whitespace.
505 add_ons="`echo $use_add_ons`"
508 AC_SUBST(add_on_subdirs)
512 ### I put this here to prevent those annoying emails from people who cannot
513 ### read and try to compile glibc on unsupported platforms. --drepper
515 ### By using the undocumented --enable-hacker-mode option for configure
516 ### one can skip this test to make the configuration not fail for unsupported
519 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
520 case "$machine-$host_os" in
524 echo "*** The GNU C library is currently not available for this platform."
525 echo "*** So far nobody cared to port it and if there is no volunteer it"
526 echo "*** might never happen. So, if you have interest to see glibc on"
527 echo "*** this platform visit"
528 echo "*** http://www.gnu.org/software/libc/porting.html"
529 echo "*** and join the group of porters"
535 dnl We need to use [ and ] for other purposes for a while now.
537 # Expand the configuration machine name into a subdirectory by architecture
538 # type and particular chip. If an add-on configure fragment already set
539 # base_machine, we don't change it.
540 test -n "$base_machine" || case "$machine" in
541 i[34567]86) base_machine=i386 machine=i386/$machine ;;
542 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
543 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
544 s390) base_machine=s390 machine=s390/s390-32 ;;
545 s390x) base_machine=s390 machine=s390/s390-64 ;;
546 sh3*) base_machine=sh machine=sh/sh3 ;;
547 sh4*) base_machine=sh machine=sh/sh4 ;;
549 base_machine=sparc machine=sparc/sparc32 ;;
550 sparcv8 | supersparc | hypersparc)
551 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
552 sparcv8plus | sparcv8plusa | sparcv9)
553 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
554 sparcv8plusb | sparcv9b)
555 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
557 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
559 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
561 base_machine=sparc machine=sparc/sparc64 ;;
563 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
565 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
567 base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
568 *) base_machine=$machine ;;
571 AC_SUBST(base_machine)
573 if test "$base_machine" = "i386"; then
574 AC_DEFINE(USE_REGPARMS)
577 # For the multi-arch option we need support in the assembler & linker.
578 AC_CACHE_CHECK([for assembler and linker STT_GNU_IFUNC support],
579 libc_cv_ld_gnu_indirect_function, [dnl
580 cat > conftest.S <<EOF
581 .type foo,%gnu_indirect_function
594 libc_cv_ld_gnu_indirect_function=no
595 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
596 -nostartfiles -nostdlib \
597 -o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
598 # Do a link to see if the backend supports IFUNC relocs.
599 $READELF -r conftest 1>&AS_MESSAGE_LOG_FD
600 LC_ALL=C $READELF -r conftest | grep 'no relocations' >/dev/null || {
601 libc_cv_ld_gnu_indirect_function=yes
606 AC_MSG_CHECKING(whether .text pseudo-op must be used)
607 AC_CACHE_VAL(libc_cv_dot_text, [dnl
608 cat > conftest.s <<EOF
612 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
613 libc_cv_dot_text=.text
616 if test -z "$libc_cv_dot_text"; then
622 if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then
623 if test x"$multi_arch" = xyes; then
624 AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
629 if test x"$multi_arch" != xno; then
630 multi_arch_d=/multiarch
633 # Compute the list of sysdep directories for this configuration.
634 # This can take a while to compute.
635 sysdep_dir=$srcdir/sysdeps
636 AC_MSG_CHECKING(sysdep dirs)
637 dnl We need to use [ and ] for other purposes for a while now.
639 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
640 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
642 test "x$base_os" != x || case "$os" in
649 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
652 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
656 o=`echo $tail | sed 's/[0-9]*$//'`
657 if test $o != $tail; then
660 # For linux-gnu, try linux-gnu, then linux.
661 o=`echo $tail | sed 's/-.*$//'`
662 if test $o != $tail; then
666 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
669 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
675 # For sparc/sparc32, try sparc/sparc32 and then sparc.
677 tail=$machine${submachine:+/$submachine}
678 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
680 # Prepend the machine's FPU directory unless --without-fp.
681 if test "$with_fp" = yes; then
684 mach="$mach /$1/nofpu"
690 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
693 # Find what sysdep directories exist.
696 for b in $base ''; do
697 for m0 in $mach ''; do
698 for v in /$vendor ''; do
699 test "$v" = / && continue
700 for o in /$ostry ''; do
701 test "$o" = / && continue
702 for m in $multi_arch_d $mach ''; do
703 for d in $add_ons_pfx ''; do
704 for a in $add_ons_sfx ''; do
705 if test -n "$m0$m0sub$b$v$o$m$msub"; then
706 try_srcdir="${srcdir}/"
710 try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
711 test -n "$enable_debug_configure" &&
712 echo "$0 [DEBUG]: try $try" >&2
713 if test -d "$try_srcdir$try"; then
714 sysnames="$sysnames $try"
715 { test -n "$o" || test -n "$b"; } && os_used=t
716 { test -n "$m" || test -n "$m0"; } && machine_used=t
718 x*/$submachine) submachine_used=t ;;
720 if test -n "$d"; then
721 case "$sysnames_add_ons" in
723 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
736 # If the assembler supports gnu_indirect_function symbol type and the
737 # architecture supports multi-arch, we enable multi-arch by default.
738 case $sysnames_add_ons$sysnames in
742 test x"$multi_arch" = xdefault && multi_arch=no
745 if test x"$multi_arch" != xno; then
746 AC_DEFINE(USE_MULTIARCH)
750 if test -z "$os_used" && test "$os" != none; then
751 AC_MSG_ERROR(Operating system $os is not supported.)
753 if test -z "$machine_used" && test "$machine" != none; then
754 AC_MSG_ERROR(The $machine is not supported.)
756 if test -z "$submachine_used" && test -n "$submachine"; then
757 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
761 # We have now validated the configuration.
763 # Expand the list of system names into a full list of directories
764 # from each element's parent name and Implies file (if present).
767 while test $# -gt 0; do
771 case " $names " in *" $name "*)
772 # Already in the list.
776 # Report each name as we discover it, so there is no long pause in output.
777 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
779 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
783 *) xsrcdir=$srcdir/ ;;
785 test -n "$enable_debug_configure" &&
786 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
788 for implies_file in Implies Implies-before Implies-after; do
789 implies_type=`echo $implies_file | sed s/-/_/`
790 eval ${implies_type}=
791 if test -f $xsrcdir$name/$implies_file; then
792 # Collect more names from the `Implies' file (removing comments).
793 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`"
794 for x in $implied_candidate; do
796 if test -d $xsrcdir$name_base/$x; then
797 eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\""
800 for d in $add_ons_pfx ''; do
804 *) try_srcdir=$srcdir/ ;;
806 test -n "$enable_debug_configure" &&
807 echo "[DEBUG]: $name $implies_file $x try($d) {$try_srcdir}$try" >&2
808 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
810 eval "${implies_type}=\"\$${implies_type} \$try\""
812 case "$sysnames_add_ons" in
814 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
818 if test $found = no; then
819 AC_MSG_WARN($name/$implies_file specifies nonexistent $x)
825 # Add NAME to the list of names.
828 # Find the parent of NAME, using the empty string if it has none.
830 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
833 test -n "$enable_debug_configure" &&
834 echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \
835 Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2
837 # Add the names implied by NAME, and NAME's parent (if it has one), to
838 # the list of names to be processed (the argument list). We prepend the
839 # implied names to the list and append the parent. We want implied
840 # directories to come before further directories inferred from the
841 # configuration components; this ensures that for sysv4, unix/common
842 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
844 sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`"
845 test -n "$sysnames" && set $sysnames
848 # Add the default directories.
849 default_sysnames="sysdeps/generic"
850 sysnames="$names $default_sysnames"
852 # The other names were emitted during the scan.
853 AC_MSG_RESULT($default_sysnames)
855 # Collect the list of add-ons that supply partial sysdeps trees.
857 for add_on in $add_ons; do
860 *) xsrcdir="$srcdir/" ;;
863 test -d "$xsrcdir$add_on/sysdeps" || {
864 case "$configured_add_ons " in
867 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
873 sysdeps_add_ons="$sysdeps_add_ons $add_on"
874 case "$sysnames_add_ons" in
877 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
882 for d in $sysnames; do
884 $add_on/sysdeps/*) ;;
887 (cd "$xsrcdir$d" && for f in *[[!~]]; do
891 test -d "$ff" || { test -e "$ff" && exit 88; }
895 test -d "$f" || { test -e "$f" && exit 88; }
899 if test $? -eq 88; then
904 if test $found = no; then
905 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
908 AC_SUBST(sysdeps_add_ons)
914 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
915 # The makefiles need to use a different form to find it in $srcdir.
916 INSTALL='\$(..)./scripts/install-sh -c'
921 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
923 # Accept binutils 2.20 or newer.
924 AC_CHECK_PROG_VER(AS, $AS, --version,
925 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
926 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as")
927 AC_CHECK_PROG_VER(LD, $LD, --version,
928 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
929 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
931 # These programs are version sensitive.
933 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
934 [version \([egcygnustpi-]*[0-9.]*\)], [4.[3-9].* | 4.[1-9][0-9].* | [5-9].* ],
935 critic_missing="$critic_missing gcc")
936 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
937 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
938 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
940 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
941 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
942 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
943 MSGFMT=: aux_missing="$aux_missing msgfmt")
944 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
945 [GNU texinfo.* \([0-9][0-9.]*\)],
946 [4.[5-9]*|4.[1-9][0-9]*|[5-9].*],
947 MAKEINFO=: aux_missing="$aux_missing makeinfo")
948 AC_CHECK_PROG_VER(SED, sed, --version,
949 [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)],
950 [3.0[2-9]*|3.[1-9]*|[4-9]*],
951 SED=: aux_missing="$aux_missing sed")
952 AC_CHECK_PROG_VER(AWK, gawk, --version,
953 [GNU Awk[^0-9]*\([0-9][0-9.]*\)],
954 [[3-9].*], critic_missing="$critic_missing gawk")
956 AC_CHECK_TOOL(NM, nm, false)
958 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
960 xno|x|x:) AUTOCONF=no ;;
963 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
964 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
965 libc_cv_autoconf_works=yes
967 libc_cv_autoconf_works=no
969 test $libc_cv_autoconf_works = yes || AUTOCONF=no
972 if test "x$AUTOCONF" = xno; then
973 aux_missing="$aux_missing autoconf"
976 test -n "$critic_missing" && AC_MSG_ERROR([
977 *** These critical programs are missing or too old:$critic_missing
978 *** Check the INSTALL file for required versions.])
980 test -n "$aux_missing" && AC_MSG_WARN([
981 *** These auxiliary programs are missing or incompatible versions:$aux_missing
982 *** some features will be disabled.
983 *** Check the INSTALL file for required versions.])
985 # if using special system headers, find out the compiler's sekrit
986 # header directory and add that to the list. NOTE: Only does the right
987 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
988 if test -n "$sysheaders"; then
989 SYSINCLUDES=-nostdinc
990 for d in include include-fixed; do
991 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
992 SYSINCLUDES="$SYSINCLUDES -isystem $i"
994 SYSINCLUDES="$SYSINCLUDES \
995 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
996 if test -n "$CXX"; then
998 for cxxheaders in `$CXX -v -S -x c++ /dev/null -o /dev/null 2>&1 \
999 | sed -n -e '1,/#include/d' -e 's/^ \(\/.*\/[cg]++\)/\1/p'`; do
1000 test "x$cxxheaders" != x &&
1001 CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders"
1005 AC_SUBST(SYSINCLUDES)
1006 AC_SUBST(CXX_SYSINCLUDES)
1008 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1009 # since this would lead to problems installing/building glibc.
1010 # LD_LIBRARY_PATH contains the current directory if one of the following
1012 # - one of the terminals (":" and ";") is the first or last sign
1013 # - two terminals occur directly after each other
1014 # - the path contains an element with a dot in it
1015 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1017 case ${LD_LIBRARY_PATH} in
1018 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1019 ld_library_path_setting="contains current directory"
1022 ld_library_path_setting="ok"
1026 AC_MSG_RESULT($ld_library_path_setting)
1027 if test "$ld_library_path_setting" != "ok"; then
1029 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1030 *** building glibc. Please change the environment variable
1031 *** and run configure again.])
1034 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1035 if $CC -v -static-libgcc 2>&1 | grep 'unrecognized option.*static-libgcc' >/dev/null; then
1036 libc_cv_gcc_static_libgcc=
1038 libc_cv_gcc_static_libgcc=-static-libgcc
1040 AC_SUBST(libc_cv_gcc_static_libgcc)
1042 AC_PATH_PROG(BASH_SHELL, bash, no)
1043 if test "$BASH_SHELL" != no &&
1044 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1045 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1046 libc_cv_have_bash2=yes
1048 libc_cv_have_bash2=no
1050 AC_SUBST(libc_cv_have_bash2)
1052 dnl We need a ksh compatible shell for tzselect.
1053 if test "$BASH_SHELL" = no; then
1054 AC_PATH_PROG(KSH, ksh, no)
1055 if test "$KSH" = no; then
1058 libc_cv_have_ksh=yes
1063 libc_cv_have_ksh=yes
1065 AC_SUBST(libc_cv_have_ksh)
1067 AC_PATH_PROG(PERL, perl, no)
1068 if test "$PERL" != no &&
1069 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1072 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1073 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1074 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1076 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1078 [#define __need_size_t
1079 #define __need_wchar_t
1082 #include <stddef.h>], [size_t size; wchar_t wchar;
1084 #error stddef.h ignored __need_*
1086 if (&size == NULL || &wchar == NULL) abort ();],
1087 libc_cv_friendly_stddef=yes,
1088 libc_cv_friendly_stddef=no)])
1089 if test $libc_cv_friendly_stddef = yes; then
1090 config_vars="$config_vars
1091 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1094 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1095 libc_cv_need_minus_P, [dnl
1096 cat > conftest.S <<EOF
1097 #include "confdefs.h"
1098 /* Nothing whatsoever. */
1100 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1101 libc_cv_need_minus_P=no
1103 libc_cv_need_minus_P=yes
1106 if test $libc_cv_need_minus_P = yes; then
1107 config_vars="$config_vars
1108 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1111 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1112 cat > conftest.s <<EOF
1115 .set glibc_conftest_frobozz,foo
1116 .globl glibc_conftest_frobozz
1118 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1119 # (but it doesn't work), so we must do a linking check to be sure.
1120 cat > conftest1.c <<\EOF
1121 extern int glibc_conftest_frobozz;
1122 void _start() { glibc_conftest_frobozz = 1; }
1124 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1125 -nostartfiles -nostdlib \
1126 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1127 libc_cv_asm_set_directive=yes
1129 libc_cv_asm_set_directive=no
1132 if test $libc_cv_asm_set_directive = yes; then
1133 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1136 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1137 libc_cv_asm_unique_object, [dnl
1138 cat > conftest.s <<EOF
1141 .type _sym, %gnu_unique_object
1143 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1144 libc_cv_asm_unique_object=yes
1146 libc_cv_asm_unique_object=no
1149 if test $libc_cv_asm_unique_object = yes; then
1150 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1153 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1154 [cat > conftest.s <<EOF
1157 .symver _sym,sym@VERS
1159 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1160 libc_cv_asm_symver_directive=yes
1162 libc_cv_asm_symver_directive=no
1165 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1166 if test $libc_cv_asm_symver_directive = yes; then
1167 cat > conftest.s <<EOF
1170 .symver _sym,sym@VERS
1172 cat > conftest.map <<EOF
1181 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1182 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1183 -o conftest.so conftest.o
1184 -nostartfiles -nostdlib
1185 -Wl,--version-script,conftest.map
1186 1>&AS_MESSAGE_LOG_FD]);
1188 libc_cv_ld_version_script_option=yes
1190 libc_cv_ld_version_script_option=no
1193 libc_cv_ld_version_script_option=no
1196 libc_cv_ld_version_script_option=no
1199 if test $shared != no &&
1200 test $libc_cv_asm_symver_directive = yes &&
1201 test $libc_cv_ld_version_script_option = yes &&
1202 test $enable_versioning = yes; then
1204 AC_DEFINE(DO_VERSIONING)
1208 AC_SUBST(VERSIONING)
1210 if test $shared != no && test $VERSIONING = no; then
1212 *** WARNING: You should not compile GNU libc without versioning. Not using
1213 *** versioning will introduce incompatibilities so that old binaries
1214 *** will not run anymore.
1215 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1217 AC_CACHE_CHECK(for .previous assembler directive,
1218 libc_cv_asm_previous_directive, [dnl
1219 cat > conftest.s <<EOF
1220 .section foo_section
1223 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1224 libc_cv_asm_previous_directive=yes
1226 libc_cv_asm_previous_directive=no
1229 if test $libc_cv_asm_previous_directive = yes; then
1230 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1232 AC_CACHE_CHECK(for .popsection assembler directive,
1233 libc_cv_asm_popsection_directive, [dnl
1234 cat > conftest.s <<EOF
1235 .pushsection foo_section
1238 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1239 libc_cv_asm_popsection_directive=yes
1241 libc_cv_asm_popsection_directive=no
1244 if test $libc_cv_asm_popsection_directive = yes; then
1245 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1248 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1249 libc_cv_asm_protected_directive, [dnl
1250 cat > conftest.s <<EOF
1256 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1257 libc_cv_asm_protected_directive=yes
1259 AC_MSG_ERROR(assembler support for symbol visibility is required)
1263 if test $libc_cv_asm_protected_directive = yes; then
1264 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1265 libc_cv_visibility_attribute,
1266 [cat > conftest.c <<EOF
1267 int foo __attribute__ ((visibility ("hidden"))) = 1;
1268 int bar __attribute__ ((visibility ("protected"))) = 1;
1270 libc_cv_visibility_attribute=no
1271 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1272 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1273 if grep '\.protected.*bar' conftest.s >/dev/null; then
1274 libc_cv_visibility_attribute=yes
1278 rm -f conftest.{c,s}
1280 if test $libc_cv_visibility_attribute != yes; then
1281 AC_MSG_ERROR(compiler support for visibility attribute is required)
1285 if test $libc_cv_visibility_attribute = yes; then
1286 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1287 libc_cv_broken_visibility_attribute,
1288 [cat > conftest.c <<EOF
1290 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1291 int bar (int x) { return x; }
1293 libc_cv_broken_visibility_attribute=yes
1294 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1296 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1298 libc_cv_broken_visibility_attribute=no
1301 rm -f conftest.c conftest.s
1303 if test $libc_cv_broken_visibility_attribute = yes; then
1304 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1308 AC_CACHE_CHECK(for broken __attribute__((alias())),
1309 libc_cv_broken_alias_attribute,
1310 [cat > conftest.c <<EOF
1311 extern int foo (int x) __asm ("xyzzy");
1312 int bar (int x) { return x; }
1313 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1315 extern __typeof (dfoo) dfoo __asm ("abccb");
1318 libc_cv_broken_alias_attribute=yes
1319 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1320 if grep 'xyzzy' conftest.s >/dev/null &&
1321 grep 'abccb' conftest.s >/dev/null; then
1322 libc_cv_broken_alias_attribute=no
1325 rm -f conftest.c conftest.s
1327 if test $libc_cv_broken_alias_attribute = yes; then
1328 AC_MSG_ERROR(working alias attribute support required)
1331 if test $libc_cv_visibility_attribute = yes; then
1332 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1333 libc_cv_have_sdata_section,
1334 [echo "int i;" > conftest.c
1335 libc_cv_have_sdata_section=no
1336 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1337 | grep '\.sdata' >/dev/null; then
1338 libc_cv_have_sdata_section=yes
1340 rm -f conftest.c conftest.so
1342 if test $libc_cv_have_sdata_section = yes; then
1343 AC_DEFINE(HAVE_SDATA_SECTION)
1347 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1348 libc_cv_initfini_array, [dnl
1349 LIBC_TRY_LINK_STATIC([
1350 int foo (void) { return 1; }
1351 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1353 [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1354 libc_cv_initfini_array=yes
1356 libc_cv_initfini_array=no
1358 [libc_cv_initfini_array=no])
1360 if test $libc_cv_initfini_array != yes; then
1361 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1364 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1365 libc_cv_ctors_header, [dnl
1366 libc_cv_ctors_header=yes
1367 LIBC_TRY_LINK_STATIC([
1368 __attribute__ ((constructor)) void ctor (void) { asm (""); }
1369 __attribute__ ((destructor)) void dtor (void) { asm (""); }
1372 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1373 { gsub(/\@<:@ */, "@<:@") }
1374 $2 == ".ctors" || $2 == ".dtors" {
1375 size = strtonum("0x" $6)
1376 align = strtonum("0x" $NF)
1378 stub@<:@$2@:>@ = size == align * 2
1381 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1382 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1383 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1385 '], [libc_cv_ctors_header=no])
1387 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1390 if test $libc_cv_ctors_header = no; then
1391 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1394 AC_CACHE_CHECK(for libunwind-support in compiler,
1395 libc_cv_cc_with_libunwind, [
1396 cat > conftest.c <<EOF
1397 int main (void) { return 0; }
1399 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1400 conftest.c -v 2>&1 >/dev/null | grep ' -lunwind ' >/dev/null; then
1401 libc_cv_cc_with_libunwind=yes
1403 libc_cv_cc_with_libunwind=no
1406 AC_SUBST(libc_cv_cc_with_libunwind)
1407 if test $libc_cv_cc_with_libunwind = yes; then
1408 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1411 LIBC_LINKER_FEATURE([-z nodelete], [-Wl,--enable-new-dtags,-z,nodelete],
1412 [libc_cv_z_nodelete=yes],
1413 [AC_MSG_ERROR(linker with -z nodelete support required)])
1415 LIBC_LINKER_FEATURE([-z nodlopen], [-Wl,--enable-new-dtags,-z,nodlopen],
1416 [libc_cv_z_nodlopen=yes],
1417 [AC_MSG_ERROR(linker with -z nodlopen support required)])
1419 LIBC_LINKER_FEATURE([-z initfirst], [-Wl,--enable-new-dtags,-z,initfirst],
1420 [libc_cv_z_initfirst=yes],
1421 [AC_MSG_ERROR(linker with -z initfirst support required)])
1423 # Add-on fragments can set these for other machines.
1424 libc_commonpagesize=${libc_commonpagesize:-no}
1425 libc_relro_required=${libc_relro_required:-no}
1426 case "$base_machine" in
1427 i[[34567]]86 | x86_64 | powerpc* | s390*)
1428 libc_commonpagesize=0x1000
1429 libc_relro_required=yes
1432 libc_commonpagesize=0x2000
1433 libc_relro_required=yes
1437 if test $libc_commonpagesize != no; then
1438 AC_CACHE_CHECK(for -z relro option,
1439 libc_cv_z_relro, [dnl
1441 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1442 int _start (void) { return 42; }
1443 extern void _exit (int);
1444 /* Since these pointers are const, they should go in rodata.
1445 Since they refer to functions that have to be resolved by
1446 dynamic linking, they should instead go in RELRO data. */
1447 const void *const relro[] = { &_start, &_exit, 0 };
1448 /* GNU ld fails to produce RELRO data when it's very small and there is no
1449 normal writable data following it, or if only uninitialized (.bss) data
1450 follows it, or only very small writable data. */
1451 int data[0x10000] = { 1, };
1453 cat > conftest.awk <<\EOF
1456 commonpagesize = strtonum(commonpagesize)
1458 { print "LINE:", $0 > "/dev/stderr" }
1460 vaddr = strtonum($3)
1461 memsz = strtonum($6)
1463 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1464 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1465 result = (end % commonpagesize == 0) ? "yes" : "broken"
1467 END { print result }
1469 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1470 -fPIC -shared -o conftest.so conftest.c
1471 -nostartfiles -nostdlib
1472 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1473 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1475 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1476 conftest.ph > conftest.cps
1478 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1480 if { test "x$libc_relro_required" = xyes &&
1481 test "x$libc_cv_z_relro" != xyes
1484 AC_MSG_ERROR(linker with -z relro support required)
1487 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1490 AC_CACHE_CHECK(for -Bgroup option,
1491 libc_cv_Bgroup, [dnl
1492 cat > conftest.c <<EOF
1493 int _start (void) { return 42; }
1495 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1496 -fPIC -shared -o conftest.so conftest.c
1497 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1504 AC_SUBST(libc_cv_Bgroup)
1507 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1508 libc_cv_as_noexecstack, [dnl
1509 cat > conftest.c <<EOF
1512 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1513 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1514 && grep .note.GNU-stack conftest.s >/dev/null \
1515 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1516 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1518 libc_cv_as_noexecstack=yes
1520 libc_cv_as_noexecstack=no
1523 if test $libc_cv_as_noexecstack = yes; then
1524 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1526 AC_SUBST(ASFLAGS_config)
1528 AC_CACHE_CHECK(for -z combreloc,
1529 libc_cv_z_combreloc, [dnl
1530 cat > conftest.c <<EOF
1531 extern int bar (int);
1533 int foo (void) { return bar (mumble); }
1535 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1536 -fPIC -shared -o conftest.so conftest.c
1537 -nostdlib -nostartfiles
1538 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1540 dnl The following test is a bit weak. We must use a tool which can test
1541 dnl cross-platform since the gcc used can be a cross compiler. Without
1542 dnl introducing new options this is not easily doable. Instead use a tool
1543 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1544 dnl look for a section named .rel.dyn.
1545 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1546 libc_cv_z_combreloc=yes
1548 libc_cv_z_combreloc=no
1551 libc_cv_z_combreloc=no
1554 if test "$libc_cv_z_combreloc" = yes; then
1555 AC_DEFINE(HAVE_Z_COMBRELOC)
1557 AC_SUBST(libc_cv_z_combreloc)
1559 LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack],
1560 [libc_cv_z_execstack=yes], [libc_cv_z_execstack=no])
1561 AC_SUBST(libc_cv_z_execstack)
1563 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1564 LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no])
1567 AC_SUBST(libc_cv_fpie)
1569 AC_CACHE_CHECK(for --hash-style option,
1570 libc_cv_hashstyle, [dnl
1571 cat > conftest.c <<EOF
1572 int _start (void) { return 42; }
1574 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1575 -fPIC -shared -o conftest.so conftest.c
1576 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1578 libc_cv_hashstyle=yes
1580 libc_cv_hashstyle=no
1583 AC_SUBST(libc_cv_hashstyle)
1585 # The linker's default -shared behavior is good enough if it
1586 # does these things that our custom linker scripts ensure that
1587 # all allocated NOTE sections come first.
1588 if test "$use_default_link" = default; then
1589 AC_CACHE_CHECK([for sufficient default -shared layout],
1590 libc_cv_use_default_link, [dnl
1591 libc_cv_use_default_link=no
1592 cat > conftest.s <<\EOF
1593 .section .note.a,"a",%note
1598 .section .note.b,"a",%note
1604 if AC_TRY_COMMAND([dnl
1605 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1606 ac_try=`$READELF -S conftest.so | sed -n \
1608 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1614 libc_seen_a=no libc_seen_b=no
1616 while test $# -ge 2 -a "$1" = NOTE; do
1618 .note.a) libc_seen_a=yes ;;
1619 .note.b) libc_seen_b=yes ;;
1623 case "$libc_seen_a$libc_seen_b" in
1625 libc_cv_use_default_link=yes
1628 echo >&AS_MESSAGE_LOG_FD "\
1629 $libc_seen_a$libc_seen_b from:
1635 use_default_link=$libc_cv_use_default_link
1638 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1639 if libc_cv_output_format=`
1640 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1644 libc_cv_output_format=
1646 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1647 AC_SUBST(libc_cv_output_format)
1649 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1650 cat > conftest.c <<EOF
1653 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1654 conftest.c 1>&AS_MESSAGE_LOG_FD])
1656 libc_cv_fno_toplevel_reorder=yes
1658 libc_cv_fno_toplevel_reorder=no
1661 if test $libc_cv_fno_toplevel_reorder = yes; then
1662 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1664 fno_unit_at_a_time=-fno-unit-at-a-time
1666 AC_SUBST(fno_unit_at_a_time)
1668 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1669 LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
1673 AC_SUBST(libc_cv_ssp)
1675 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1676 cat > conftest.c <<EOF
1678 #ifdef __GNUC_GNU_INLINE__
1679 main () { return 0;}
1684 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1685 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1687 libc_cv_gnu89_inline=yes
1689 libc_cv_gnu89_inline=no
1692 if test $libc_cv_gnu89_inline = yes; then
1693 gnu89_inline=-fgnu89-inline
1697 AC_SUBST(gnu89_inline)
1699 AC_CACHE_CHECK(whether cc puts quotes around section names,
1700 libc_cv_have_section_quotes,
1701 [cat > conftest.c <<EOF
1702 static const int foo
1703 __attribute__ ((section ("bar"))) = 1;
1705 if ${CC-cc} -S conftest.c -o conftest.s; then
1706 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1707 libc_cv_have_section_quotes=yes
1709 libc_cv_have_section_quotes=no
1712 libc_cv_have_section_quotes=unknown
1714 rm -f conftest.{c,s}
1716 if test $libc_cv_have_section_quotes = yes; then
1717 AC_DEFINE(HAVE_SECTION_QUOTES)
1720 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1722 cat > conftest.s <<EOF
1727 .weak bar; bar = foo
1729 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1730 libc_cv_asm_weak_directive=yes
1732 libc_cv_asm_weak_directive=no
1736 if test $libc_cv_asm_weak_directive = no; then
1737 AC_CACHE_CHECK(for assembler .weakext directive,
1738 libc_cv_asm_weakext_directive,
1740 cat > conftest.s <<EOF
1749 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1750 libc_cv_asm_weakext_directive=yes
1752 libc_cv_asm_weakext_directive=no
1758 if test $libc_cv_asm_weak_directive = yes; then
1759 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1760 elif test $libc_cv_asm_weakext_directive = yes; then
1761 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1764 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1766 sparc/sparc64*) cfi_offset=2047;;
1769 cat > conftest.s <<EOF
1771 .type func,%function
1775 .cfi_rel_offset 1, $cfi_offset
1778 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1779 libc_cv_asm_cfi_directives=yes
1781 libc_cv_asm_cfi_directives=no
1784 if test $libc_cv_asm_cfi_directives = yes; then
1785 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1788 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1789 cat > conftest.c <<\EOF
1794 dnl No \ in command here because it ends up inside ''.
1795 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1796 -nostdlib -nostartfiles -Wl,--no-whole-archive
1797 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1798 libc_cv_ld_no_whole_archive=yes
1800 libc_cv_ld_no_whole_archive=no
1803 if test $libc_cv_ld_no_whole_archive = no; then
1804 AC_MSG_ERROR([support for --no-whole-archive is needed])
1807 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1808 cat > conftest.c <<\EOF
1813 dnl No \ in command here because it ends up inside ''.
1814 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1815 -nostdlib -nostartfiles -fexceptions
1816 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1817 libc_cv_gcc_exceptions=yes
1819 libc_cv_gcc_exceptions=no
1822 if test $libc_cv_gcc_exceptions = yes; then
1823 exceptions=-fexceptions
1825 AC_SUBST(exceptions)dnl
1827 if test "$host_cpu" = powerpc ; then
1828 # Check for a bug present in at least versions 2.8.x of GCC
1829 # and versions 1.0.x of EGCS.
1830 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1831 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1832 libc_cv_c_asmcr0_bug='no',
1833 libc_cv_c_asmcr0_bug='yes')])
1834 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1835 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1839 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1840 cat > conftest.c <<\EOF
1843 __builtin_memset (x, 0, 1000);
1847 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1849 libc_cv_gcc_builtin_memset=no
1851 libc_cv_gcc_builtin_memset=yes
1854 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1855 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1858 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1859 cat > conftest.c <<\EOF
1860 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1861 char *foo (const char *a, const char *b)
1863 return __builtin_strstr (a, b);
1867 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1869 libc_cv_gcc_builtin_redirection=yes
1871 libc_cv_gcc_builtin_redirection=no
1874 if test "$libc_cv_gcc_builtin_redirection" = no; then
1875 AC_MSG_ERROR([support for the symbol redirection needed])
1878 dnl Check whether the compiler supports the __thread keyword.
1879 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1880 [cat > conftest.c <<\EOF
1881 __thread int a = 42;
1883 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1884 libc_cv_gcc___thread=yes
1886 libc_cv_gcc___thread=no
1889 if test "$libc_cv_gcc___thread" = no; then
1890 AC_MSG_ERROR([support for the __thread keyword is required])
1893 dnl Check whether the compiler supports the tls_model attribute.
1894 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1895 cat > conftest.c <<\EOF
1896 extern __thread int a __attribute__((tls_model ("initial-exec")));
1898 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1899 libc_cv_gcc_tls_model_attr=yes
1901 libc_cv_gcc_tls_model_attr=no
1904 if test "$libc_cv_gcc_tls_model_attr" = no; then
1905 AC_MSG_ERROR([support for the tls_model attribute is required])
1908 dnl Determine how to disable generation of FMA instructions.
1909 AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions],
1910 libc_cv_cc_nofma, [dnl
1912 for opt in -ffp-contract=off -mno-fused-madd; do
1913 LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break])
1916 if test -n "$submachine"; then
1917 AC_CACHE_CHECK([for compiler option for CPU variant],
1918 libc_cv_cc_submachine, [dnl
1919 libc_cv_cc_submachine=no
1920 for opt in "-march=$submachine" "-mcpu=$submachine"; do
1921 LIBC_TRY_CC_OPTION([$opt], [
1922 libc_cv_cc_submachine="$opt"
1925 if test "x$libc_cv_cc_submachine" = xno; then
1926 AC_MSG_ERROR([${CC-cc} does not support $submachine])
1929 AC_SUBST(libc_cv_cc_submachine)
1931 dnl Check whether we have the gd library available.
1932 AC_MSG_CHECKING(for libgd)
1933 if test "$with_gd" != "no"; then
1934 old_CFLAGS="$CFLAGS"
1935 CFLAGS="$CFLAGS $libgd_include"
1936 old_LDFLAGS="$LDFLAGS"
1937 LDFLAGS="$LDFLAGS $libgd_ldflags"
1939 LIBS="$LIBS -lgd -lpng -lz -lm"
1940 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1941 CFLAGS="$old_CFLAGS"
1942 LDFLAGS="$old_LDFLAGS"
1947 AC_MSG_RESULT($LIBGD)
1951 if test x$with_selinux = xno ; then
1954 # See if we have the SELinux library
1955 AC_CHECK_LIB(selinux, is_selinux_enabled,
1956 have_selinux=yes, have_selinux=no)
1957 # See if we have the SELinux header with the NSCD permissions in it.
1958 if test x$have_selinux = xyes ; then
1959 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
1960 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
1961 [#ifdef NSCD__SHMEMHOST
1964 #error NSCD__SHMEMHOST not defined
1966 have_selinux=yes, have_selinux=no)
1967 AC_MSG_RESULT($have_selinux)
1970 if test x$with_selinux = xyes ; then
1971 if test x$have_selinux = xno ; then
1972 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
1976 # Check if we're building with SELinux support.
1977 if test "x$have_selinux" = xyes; then
1978 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
1980 # See if we have the libaudit library
1981 AC_CHECK_LIB(audit, audit_log_user_avc_message,
1982 have_libaudit=yes, have_libaudit=no)
1983 if test "x$have_libaudit" = xyes; then
1984 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
1986 AC_SUBST(have_libaudit)
1988 # See if we have the libcap library
1989 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
1990 if test "x$have_libcap" = xyes; then
1991 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
1993 AC_SUBST(have_libcap)
1995 AC_SUBST(have_selinux)
1997 dnl check for the size of 'long double'.
1998 AC_CHECK_SIZEOF(long double, 0)
1999 sizeof_long_double=$ac_cv_sizeof_long_double
2000 AC_SUBST(sizeof_long_double)
2003 dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE.
2004 dnl Since we are building the implementations of the fortified functions here,
2005 dnl having the macro defined interacts very badly.
2006 AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source,
2007 [AC_TRY_COMPILE([], [
2008 #ifdef _FORTIFY_SOURCE
2011 [libc_cv_predef_fortify_source=no],
2012 [libc_cv_predef_fortify_source=yes])])
2013 if test $libc_cv_predef_fortify_source = yes; then
2014 CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE"
2018 dnl Check for silly hacked compilers inserting -fstack-protector.
2019 dnl This breaks badly for the early startup code we compile, since
2020 dnl the compiled code can refer to a magic machine-dependent location
2021 dnl for the canary value before we have sufficient setup for that to
2022 dnl work. It's also questionable to build all of libc with this flag
2023 dnl even when you're doing that for most applications you build, since
2024 dnl libc's code is so heavily-used and performance-sensitive. If we
2025 dnl ever really want to make that work, it should be enabled explicitly
2026 dnl in the libc build, not inherited from implicit compiler settings.
2027 AC_CACHE_CHECK([whether $CC implicitly enables -fstack-protector],
2028 libc_cv_predef_stack_protector, [
2029 AC_TRY_COMPILE([extern void foobar (char *);],
2030 [char large_array[2048]; foobar (large_array);], [
2031 libc_undefs=`$NM -u conftest.o |
2032 LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \
2033 2>&AS_MESSAGE_LOG_FD` || {
2034 AC_MSG_ERROR([confusing output from $NM -u])
2036 echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'"
2037 # On some architectures, there are architecture-specific undefined
2038 # symbols (resolved by the linker), so filter out unknown symbols.
2039 # This will fail to produce the correct result if the compiler
2040 # defaults to -fstack-protector but this produces an undefined symbol
2041 # other than __stack_chk_fail. However, compilers like that have not
2042 # been encountered in practice.
2043 libc_undefs=`echo "$libc_undefs" | egrep '^(foobar|__stack_chk_fail)$'`
2044 case "$libc_undefs" in
2045 foobar) libc_cv_predef_stack_protector=no ;;
2047 foobar') libc_cv_predef_stack_protector=yes ;;
2048 *) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;;
2050 [AC_MSG_ERROR([test compilation failed])])
2053 if test $libc_cv_predef_stack_protector = yes; then
2054 libc_extra_cflags=-fno-stack-protector
2056 AC_SUBST(libc_extra_cflags)
2058 ### End of automated tests.
2059 ### Now run sysdeps configure fragments.
2061 # They also can set these variables.
2063 ldd_rewrite_script=no
2064 libc_cv_sysconfdir=$sysconfdir
2065 libc_cv_localstatedir=$localstatedir
2066 libc_cv_gcc_unwind_find_fde=no
2069 # Iterate over all the sysdep directories we will use, running their
2070 # configure fragments.
2071 for dir in $sysnames; do
2074 *) dest=$srcdir/$dir ;;
2076 if test -r $dest/configure; then
2077 AC_MSG_RESULT(running configure fragment for $dir)
2082 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2083 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2085 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2087 # A sysdeps configure fragment can reset this if IFUNC is not actually
2088 # usable even though the assembler knows how to generate the symbol type.
2089 if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then
2090 AC_DEFINE(HAVE_IFUNC)
2093 # This is far from the AC_ARG_ENABLE that sets it so that a sysdeps
2094 # configure fragment can override the value to prevent this AC_DEFINE.
2096 if test "x$use_nscd" != xno; then
2097 AC_DEFINE([USE_NSCD])
2099 if test "x$build_nscd" = xdefault; then
2100 build_nscd=$use_nscd
2103 # Test for old glibc 2.0.x headers so that they can be removed properly
2104 # Search only in includedir.
2105 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2106 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2108 old_glibc_headers=yes
2110 old_glibc_headers=no
2112 AC_MSG_RESULT($old_glibc_headers)
2113 if test ${old_glibc_headers} = yes; then
2114 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2115 AC_MSG_WARN(*** be removed.)
2117 AC_SUBST(old_glibc_headers)
2119 AC_SUBST(libc_cv_slibdir)
2120 AC_SUBST(libc_cv_localedir)
2121 AC_SUBST(libc_cv_sysconfdir)
2122 AC_SUBST(libc_cv_localstatedir)
2123 AC_SUBST(libc_cv_rootsbindir)
2124 AC_SUBST(libc_cv_forced_unwind)
2126 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2127 AC_SUBST(libc_cv_cc_sse4)
2128 AC_SUBST(libc_cv_cc_avx)
2129 AC_SUBST(libc_cv_cc_sse2avx)
2130 AC_SUBST(libc_cv_cc_novzeroupper)
2131 AC_SUBST(libc_cv_cc_fma4)
2132 AC_SUBST(libc_cv_cc_nofma)
2133 AC_SUBST(libc_cv_as_i686)
2134 AC_SUBST(libc_cv_sparc_as_vis3)
2136 if test x$use_ldconfig = xyes; then
2137 AC_DEFINE(USE_LDCONFIG)
2139 AC_SUBST(use_ldconfig)
2140 AC_SUBST(ldd_rewrite_script)
2145 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2146 [libc_cv_pic_default=yes
2147 cat > conftest.c <<EOF
2148 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2149 # error PIC is default.
2152 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2153 libc_cv_pic_default=no
2156 AC_SUBST(libc_cv_pic_default)
2159 AC_SUBST(static_nss)
2163 dnl See sysdeps/mach/configure.in for this variable.
2164 AC_SUBST(mach_interface_list)
2166 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2167 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2171 AC_CONFIG_FILES([config.make Makefile])
2172 AC_CONFIG_COMMANDS([default],[[
2173 case $CONFIG_FILES in *config.make*)
2174 echo "$config_vars" >> config.make;;
2176 test -d bits || mkdir bits]],[[config_vars='$config_vars']])