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 dnl This is here so we can set $subdirs directly based on configure fragments.
14 if test $host != $build; then
15 AC_CHECK_PROGS(BUILD_CC, gcc cc)
17 AC_SUBST(cross_compiling)
19 # We need the C++ compiler only for testing.
22 if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
23 AC_MSG_ERROR([you must configure in a separate build directory])
26 # This will get text that should go into config.make.
29 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
31 AC_HELP_STRING([--with-gd=DIR],
32 [find libgd include dir and library with prefix DIR]),
36 *) libgd_include="-I$withval/include"
37 libgd_ldflags="-L$withval/lib" ;;
40 AC_ARG_WITH([gd-include],
41 AC_HELP_STRING([--with-gd-include=DIR],
42 [find libgd include files in DIR]),
44 case "$with_gd_include" in
46 *) libgd_include="-I$withval" ;;
50 AC_HELP_STRING([--with-gd-lib=DIR],
51 [find libgd library files in DIR]),
53 case "$with_gd_lib" in
55 *) libgd_ldflags="-L$withval" ;;
59 if test -n "$libgd_include"; then
60 config_vars="$config_vars
61 CFLAGS-memusagestat.c = $libgd_include"
63 if test -n "$libgd_ldflags"; then
64 config_vars="$config_vars
65 libgd-LDFLAGS = $libgd_ldflags"
68 dnl Arguments to specify presence of other packages/features.
70 AC_HELP_STRING([--with-fp],
71 [if using floating-point hardware @<:@default=yes@:>@]),
75 AC_ARG_WITH([binutils],
76 AC_HELP_STRING([--with-binutils=PATH],
77 [specify location of binutils (as and ld)]),
78 [path_binutils=$withval],
80 AC_ARG_WITH([selinux],
81 AC_HELP_STRING([--with-selinux],
82 [if building with SELinux support]),
83 [with_selinux=$withval],
86 AC_ARG_WITH([headers],
87 AC_HELP_STRING([--with-headers=PATH],
88 [location of system headers to use
89 (for example /usr/src/linux/include)
90 @<:@default=compiler default@:>@]),
91 [sysheaders=$withval],
94 AC_SUBST(use_default_link)
95 AC_ARG_WITH([default-link],
96 AC_HELP_STRING([--with-default-link],
97 [do not use explicit linker scripts]),
98 [use_default_link=$withval],
99 [use_default_link=default])
101 AC_ARG_ENABLE([sanity-checks],
102 AC_HELP_STRING([--disable-sanity-checks],
103 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
104 [enable_sanity=$enableval],
107 AC_SUBST(enable_check_abi)
108 AC_ARG_ENABLE([check-abi],
109 AC_HELP_STRING([--enable-check-abi],
110 [do "make check-abi" in "make check" (no/warn/yes)
111 @<:@default=no@:>@]),
112 [enable_check_abi=$enableval],
113 [enable_check_abi=no])
115 AC_ARG_ENABLE([shared],
116 AC_HELP_STRING([--enable-shared],
117 [build shared library @<:@default=yes if GNU ld@:>@]),
120 AC_ARG_ENABLE([profile],
121 AC_HELP_STRING([--enable-profile],
122 [build profiled library @<:@default=no@:>@]),
123 [profile=$enableval],
125 AC_ARG_ENABLE([versioning],
126 AC_HELP_STRING([--disable-versioning],
127 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
128 [enable_versioning=$enableval],
129 [enable_versioning=yes])
131 AC_ARG_ENABLE([oldest-abi],
132 AC_HELP_STRING([--enable-oldest-abi=ABI],
133 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
134 [oldest_abi=$enableval],
136 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
139 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
143 AC_ARG_ENABLE([stackguard-randomization],
144 AC_HELP_STRING([--enable-stackguard-randomization],
145 [initialize __stack_chk_guard canary with a random number at program start]),
146 [enable_stackguard_randomize=$enableval],
147 [enable_stackguard_randomize=no])
148 if test "$enable_stackguard_randomize" = yes; then
149 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
152 dnl Generic infrastructure for drop-in additions to libc.
153 AC_ARG_ENABLE([add-ons],
154 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
155 [configure and build add-ons in DIR1,DIR2,...
156 search for add-ons if no parameter given]),
157 , [enable_add_ons=yes])
159 AC_ARG_ENABLE([hidden-plt],
160 AC_HELP_STRING([--disable-hidden-plt],
161 [do not hide internal function calls to avoid PLT]),
164 if test "x$hidden" = xno; then
168 AC_ARG_ENABLE([bind-now],
169 AC_HELP_STRING([--enable-bind-now],
170 [disable lazy relocations in DSOs]),
171 [bindnow=$enableval],
175 dnl On some platforms we cannot use dynamic loading. We must provide
176 dnl static NSS modules.
177 AC_ARG_ENABLE([static-nss],
178 AC_HELP_STRING([--enable-static-nss],
179 [build static NSS modules @<:@default=no@:>@]),
180 [static_nss=$enableval],
182 dnl Enable static NSS also if we build no shared objects.
183 if test x"$static_nss" = xyes || test x"$shared" = xno; then
185 AC_DEFINE(DO_STATIC_NSS)
188 AC_ARG_ENABLE([force-install],
189 AC_HELP_STRING([--disable-force-install],
190 [don't force installation of files from this package, even if they are older than the installed files]),
191 [force_install=$enableval],
193 AC_SUBST(force_install)
195 dnl On some platforms we allow dropping compatibility with all kernel
197 AC_ARG_ENABLE([kernel],
198 AC_HELP_STRING([--enable-kernel=VERSION],
199 [compile for compatibility with kernel not older than VERSION]),
200 [minimum_kernel=$enableval],
202 dnl Prevent unreasonable values.
203 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
204 # Better nothing than this.
207 if test "$minimum_kernel" = current; then
208 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
212 dnl For the development we sometimes want gcc to issue even more warnings.
213 dnl This is not the default since many of the extra warnings are not
215 AC_ARG_ENABLE([all-warnings],
216 AC_HELP_STRING([--enable-all-warnings],
217 [enable all useful warnings gcc can issue]),
218 [all_warnings=$enableval],
220 AC_SUBST(all_warnings)
222 AC_ARG_ENABLE([multi-arch],
223 AC_HELP_STRING([--enable-multi-arch],
224 [enable single DSO with optimizations for multiple architectures]),
225 [multi_arch=$enableval],
226 [multi_arch=default])
228 AC_ARG_ENABLE([nss-crypt],
229 AC_HELP_STRING([--enable-nss-crypt],
230 [enable libcrypt to use nss]),
231 [nss_crypt=$enableval],
233 if test x$nss_crypt = xyes; then
234 nss_includes=-I$(nss-config --includedir 2>/dev/null)
235 if test $? -ne 0; then
236 AC_MSG_ERROR([cannot find include directory with nss-config])
239 CFLAGS="$CFLAGS $nss_includes"
240 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
242 #include <nsslowhash.h>
243 void f (void) { NSSLOW_Init (); }])],
244 libc_cv_nss_crypt=yes,
246 cannot find NSS headers with lowlevel hash function interfaces]))
248 LIBS="$LIBS -lfreebl3"
249 AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
251 #include <nsslowhash.h>],
253 libc_cv_nss_crypt=yes,
255 cannot link program using lowlevel NSS hash functions]))
261 AC_SUBST(libc_cv_nss_crypt)
263 # The way shlib-versions is used to generate soversions.mk uses a
264 # fairly simplistic model for name recognition that can't distinguish
265 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
266 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
267 # tell. This doesn't get used much beyond that, so it's fairly safe.
272 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
276 # We keep the original values in `$config_*' and never modify them, so we
277 # can write them unchanged into config.make. Everything else uses
278 # $machine, $vendor, and $os, and changes them whenever convenient.
279 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
281 # Don't allow vendor == "unknown"
282 test "$config_vendor" = unknown && config_vendor=
283 config_os="`echo $config_os | sed 's/^unknown-//'`"
285 # Some configurations imply other options.
288 # The configure fragment of an add-on port can modify these to supplement
289 # or override the table in the case statement below. No fragment should
290 # ever change the config_* variables, however.
291 machine=$config_machine
292 vendor=$config_vendor
296 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
298 if test "$machine" = rs6000; then
302 # Braindead PowerPC box with absolutely no FPU.
303 case "$machine-$host_os" in
311 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
314 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
316 *) submachine="$withval" ;;
320 dnl Let sysdeps/*/preconfigure act here, like they can in add-ons.
321 LIBC_PRECONFIGURE([$srcdir], [for sysdeps])
323 # An add-on can set this when it wants to disable the sanity check below.
326 dnl Having this here, though empty, makes sure that if add-ons' fragments
327 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
328 dnl our AC_OUTPUT will actually use it.
331 case "$enable_add_ons" in
334 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
335 sed 's@/[[^/]]*$@@' | sort | uniq`
336 add_ons_automatic=yes
338 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
339 add_ons_automatic=no ;;
345 if test x"$add_ons" != x; then
346 for f in $add_ons; do
351 *** It seems that you're using an old \`crypt' add-on. crypt is now
352 *** part of glibc and using the old add-on will not work with this
353 *** release. Start again with fresh sources and without the old
354 *** \`crypt' add-on.])
358 *** It seems that you're using an old \`localedata' add-on. localedata
359 *** is now part of glibc and using the old add-on will not work with
360 *** this release. Start again with fresh sources and without the old
361 *** \`localedata' add-on.])
366 # Now source each add-on's configure fragment.
367 # The fragments can use $srcdir/$libc_add_on to find themselves,
368 # and test $add_ons_automatic to see if they were explicitly requested.
369 # A fragment can clear (or even change) $libc_add_on to affect
370 # whether it goes into the list to be actually used in the build.
372 for libc_add_on in $add_ons; do
373 # Test whether such a directory really exists.
374 # It can be absolute, or relative to $srcdir, or relative to the build dir.
375 case "$libc_add_on" in
377 libc_add_on_srcdir=$libc_add_on
380 test -d "$srcdir/$libc_add_on" || {
381 if test -d "$libc_add_on"; then
382 libc_add_on="`pwd`/$libc_add_on"
384 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
387 libc_add_on_srcdir=$srcdir/$libc_add_on
391 libc_add_on_frag=$libc_add_on_srcdir/configure
392 libc_add_on_canonical=
393 libc_add_on_config_subdirs=
394 if test -r "$libc_add_on_frag"; then
395 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
396 libc_add_on_canonical=unknown
398 . "$libc_add_on_frag"
399 test -z "$libc_add_on" || {
400 configured_add_ons="$configured_add_ons $libc_add_on"
401 if test "x$libc_add_on_canonical" = xunknown; then
402 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
404 for d in $libc_add_on_subdirs; do
405 case "$libc_add_on" in
406 /*) subdir_srcdir="$libc_add_on" ;;
407 *) subdir_srcdir="\$(..)$libc_add_on" ;;
411 d="${libc_add_on_canonical:-$libc_add_on}"
417 subdir_srcdir="$subdir_srcdir/$d"
420 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
421 add_on_subdirs="$add_on_subdirs $d"
422 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
423 $d-srcdir = $subdir_srcdir"
425 for d in $libc_add_on_config_subdirs; do
428 fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
430 if test ! -d "$libc_add_on_srcdir/$d"; then
431 AC_MSG_ERROR(fragment wants to configure missing directory $d)
433 case "$libc_add_on" in
435 relative path required for add-on using \$libc_add_on_config_subdirs) ;;
437 subdirs="$subdirs $libc_add_on/$d"
441 if test -n "$libc_add_on"; then
442 LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for])
443 use_add_ons="$use_add_ons $libc_add_on"
444 add_ons_pfx="$add_ons_pfx $libc_add_on/"
445 test -z "$libc_add_on_canonical" ||
446 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
449 # Use echo to strip excess whitespace.
450 add_ons="`echo $use_add_ons`"
453 AC_SUBST(add_on_subdirs)
457 ### I put this here to prevent those annoying emails from people who cannot
458 ### read and try to compile glibc on unsupported platforms. --drepper
460 ### By using the undocumented --enable-hacker-mode option for configure
461 ### one can skip this test to make the configuration not fail for unsupported
464 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
465 case "$machine-$host_os" in
466 *-linux* | *-gnu* | arm*-none*)
469 echo "*** The GNU C library is currently not available for this platform."
470 echo "*** So far nobody cared to port it and if there is no volunteer it"
471 echo "*** might never happen. So, if you have interest to see glibc on"
472 echo "*** this platform visit"
473 echo "*** http://www.gnu.org/software/libc/porting.html"
474 echo "*** and join the group of porters"
480 dnl We need to use [ and ] for other purposes for a while now.
482 # Expand the configuration machine name into a subdirectory by architecture
483 # type and particular chip. If an add-on configure fragment already set
484 # base_machine, we don't change it.
485 test -n "$base_machine" || case "$machine" in
486 i[34567]86) base_machine=i386 machine=i386/$machine ;;
487 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
488 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
489 s390) base_machine=s390 machine=s390/s390-32 ;;
490 s390x) base_machine=s390 machine=s390/s390-64 ;;
491 sh3*) base_machine=sh machine=sh/sh3 ;;
492 sh4*) base_machine=sh machine=sh/sh4 ;;
494 base_machine=sparc machine=sparc/sparc32 ;;
495 sparcv8 | supersparc | hypersparc)
496 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
497 sparcv8plus | sparcv8plusa | sparcv9)
498 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
499 sparcv8plusb | sparcv9b)
500 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
502 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
504 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
506 base_machine=sparc machine=sparc/sparc64 ;;
508 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
510 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
512 base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
513 *) base_machine=$machine ;;
516 AC_SUBST(base_machine)
518 if test "$base_machine" = "i386"; then
519 AC_DEFINE(USE_REGPARMS)
522 # For the multi-arch option we need support in the assembler.
523 AC_CACHE_CHECK([for assembler gnu_indirect_function symbol type support],
524 libc_cv_asm_gnu_indirect_function, [dnl
525 cat > conftest.s <<EOF
526 .type foo,%gnu_indirect_function
528 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD;
530 libc_cv_asm_gnu_indirect_function=yes
532 libc_cv_asm_gnu_indirect_function=no
536 AC_MSG_CHECKING(whether .text pseudo-op must be used)
537 AC_CACHE_VAL(libc_cv_dot_text, [dnl
538 cat > conftest.s <<EOF
542 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
543 libc_cv_dot_text=.text
546 if test -z "$libc_cv_dot_text"; then
552 AC_CACHE_CHECK(for assembler global-symbol directive,
553 libc_cv_asm_global_directive, [dnl
554 libc_cv_asm_global_directive=UNKNOWN
555 for ac_globl in .globl .global .EXPORT; do
556 cat > conftest.s <<EOF
561 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
562 libc_cv_asm_global_directive=${ac_globl}
565 test $libc_cv_asm_global_directive != UNKNOWN && break
567 if test $libc_cv_asm_global_directive = UNKNOWN; then
568 AC_MSG_ERROR(cannot determine asm global directive)
570 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
573 AC_CACHE_CHECK(for assembler .type directive prefix,
574 libc_cv_asm_type_prefix, [dnl
575 libc_cv_asm_type_prefix=no
576 for ac_try_prefix in '@' '%' '#'; do
577 cat > conftest.s <<EOF
579 ${libc_cv_asm_global_directive} foo
580 .type foo, ${ac_try_prefix}object
585 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
586 libc_cv_asm_type_prefix=${ac_try_prefix}
589 test "x$libc_cv_asm_type_prefix" != xno && break
591 if test "x$libc_cv_asm_type_prefix" != xno; then
592 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
595 if test x"$libc_cv_asm_gnu_indirect_function" != xyes -o x"$libc_cv_asm_type_prefix" = xno; then
596 if test x"$multi_arch" = xyes; then
597 AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
602 if test x"$multi_arch" != xno; then
603 multi_arch_d=/multiarch
606 # Compute the list of sysdep directories for this configuration.
607 # This can take a while to compute.
608 sysdep_dir=$srcdir/sysdeps
609 AC_MSG_CHECKING(sysdep dirs)
610 dnl We need to use [ and ] for other purposes for a while now.
612 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
613 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
615 test "x$base_os" != x || case "$os" in
618 netbsd* | 386bsd* | freebsd* | bsdi*)
619 base_os=unix/bsd/bsd4.4 ;;
620 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
622 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
625 base_os=unix/sysv/irix6/$os ;;
627 base_os=unix/sysv/sysv4 ;;
629 base_os=standalone ;;
632 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
635 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
639 o=`echo $tail | sed 's/[0-9]*$//'`
640 if test $o != $tail; then
643 # For linux-gnu, try linux-gnu, then linux.
644 o=`echo $tail | sed 's/-.*$//'`
645 if test $o != $tail; then
649 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
652 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
658 # For sparc/sparc32, try sparc/sparc32 and then sparc.
660 tail=$machine${submachine:+/$submachine}
661 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
663 # Prepend the machine's FPU directory unless --without-fp.
664 if test "$with_fp" = yes; then
667 mach="$mach /$1/nofpu"
673 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
676 # Find what sysdep directories exist.
679 for b in $base ''; do
680 for m0 in $mach ''; do
681 for v in /$vendor ''; do
682 test "$v" = / && continue
683 for o in /$ostry ''; do
684 test "$o" = / && continue
685 for m in $multi_arch_d $mach ''; do
686 for d in $add_ons_pfx ''; do
687 for a in $add_ons_sfx ''; do
688 if test -n "$m0$m0sub$b$v$o$m$msub"; then
689 try_srcdir="${srcdir}/"
693 try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
694 test -n "$enable_debug_configure" &&
695 echo "$0 [DEBUG]: try $try" >&2
696 if test -d "$try_srcdir$try"; then
697 sysnames="$sysnames $try"
698 { test -n "$o" || test -n "$b"; } && os_used=t
699 { test -n "$m" || test -n "$m0"; } && machine_used=t
701 x*/$submachine) submachine_used=t ;;
703 if test -n "$d"; then
704 case "$sysnames_add_ons" in
706 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
719 # If the assembler supports gnu_indirect_function symbol type and the
720 # architecture supports multi-arch, we enable multi-arch by default.
721 case $sysnames_add_ons$sysnames in
725 test x"$multi_arch" = xdefault && multi_arch=no
728 if test x"$multi_arch" != xno; then
729 AC_DEFINE(USE_MULTIARCH)
733 if test -z "$os_used" && test "$os" != none; then
734 AC_MSG_ERROR(Operating system $os is not supported.)
736 if test -z "$machine_used" && test "$machine" != none; then
737 AC_MSG_ERROR(The $machine is not supported.)
739 if test -z "$submachine_used" && test -n "$submachine"; then
740 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
744 # We have now validated the configuration.
747 # Look for an `elf' subdirectory of each machine directory.
748 # We prepend these rather than inserting them whereever the machine appears
749 # because things specified by the machine's ELF ABI should override
750 # OS-specific things, and should always be the same for any OS on the
751 # machine (otherwise what's the point of an ABI?).
753 for d in $add_ons_pfx ''; do
755 if test -d $srcdir/${d}sysdeps$m/elf; then
756 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
760 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
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 if test -f $xsrcdir$name/Implies; then
789 # Collect more names from the `Implies' file (removing comments).
790 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
792 for x in $implied_candidate; do
794 if test -d $xsrcdir$name_base/$x; then
795 implied="$implied $name_base/$x";
798 for d in $add_ons_pfx ''; do
802 *) try_srcdir=$srcdir/ ;;
804 test -n "$enable_debug_configure" &&
805 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
806 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
808 implied="$implied $try"
810 case "$sysnames_add_ons" in
812 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
816 if test $found = no; then
817 AC_MSG_WARN($name/Implies specifies nonexistent $x)
824 # Add NAME to the list of names.
827 # Find the parent of NAME, using the empty string if it has none.
829 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
832 # Add the names implied by NAME, and NAME's parent (if it has one), to
833 # the list of names to be processed (the argument list). We prepend the
834 # implied names to the list and append the parent. We want implied
835 # directories to come before further directories inferred from the
836 # configuration components; this ensures that for sysv4, unix/common
837 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
839 sysnames="`echo $implied $* $parent`"
840 test -n "$sysnames" && set $sysnames
843 # Add the default directories.
844 default_sysnames="sysdeps/generic/elf sysdeps/generic"
845 sysnames="$names $default_sysnames"
847 # The other names were emitted during the scan.
848 AC_MSG_RESULT($default_sysnames)
850 # Collect the list of add-ons that supply partial sysdeps trees.
852 for add_on in $add_ons; do
855 *) xsrcdir="$srcdir/" ;;
858 test -d "$xsrcdir$add_on/sysdeps" || {
859 case "$configured_add_ons " in
862 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
868 sysdeps_add_ons="$sysdeps_add_ons $add_on"
869 case "$sysnames_add_ons" in
872 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
877 for d in $sysnames; do
879 $add_on/sysdeps/*) ;;
882 (cd "$xsrcdir$d" && for f in *[[!~]]; do
886 test -d "$ff" || { test -e "$ff" && exit 88; }
890 test -d "$f" || { test -e "$f" && exit 88; }
894 if test $? -eq 88; then
899 if test $found = no; then
900 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
903 AC_SUBST(sysdeps_add_ons)
909 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
910 # The makefiles need to use a different form to find it in $srcdir.
911 INSTALL='\$(..)./scripts/install-sh -c'
916 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
918 # Accept binutils 2.20 or newer.
919 AC_CHECK_PROG_VER(AS, $AS, --version,
920 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
921 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as")
922 AC_CHECK_PROG_VER(LD, $LD, --version,
923 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
924 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
926 # These programs are version sensitive.
928 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
929 [version \([egcygnustpi-]*[0-9.]*\)], [4.[3-9].* | 4.[1-9][0-9].* | [5-9].* ],
930 critic_missing="$critic_missing gcc")
931 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
932 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
933 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
935 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
936 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
937 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
938 MSGFMT=: aux_missing="$aux_missing msgfmt")
939 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
940 [GNU texinfo.* \([0-9][0-9.]*\)],
942 MAKEINFO=: aux_missing="$aux_missing makeinfo")
943 AC_CHECK_PROG_VER(SED, sed, --version,
944 [GNU sed version \([0-9]*\.[0-9.]*\)],
945 [3.0[2-9]*|3.[1-9]*|[4-9]*],
946 SED=: aux_missing="$aux_missing sed")
948 AC_CHECK_TOOL(READELF, readelf, false)
950 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
952 xno|x|x:) AUTOCONF=no ;;
955 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
956 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
957 libc_cv_autoconf_works=yes
959 libc_cv_autoconf_works=no
961 test $libc_cv_autoconf_works = yes || AUTOCONF=no
964 if test "x$AUTOCONF" = xno; then
965 aux_missing="$aux_missing autoconf"
968 test -n "$critic_missing" && AC_MSG_ERROR([
969 *** These critical programs are missing or too old:$critic_missing
970 *** Check the INSTALL file for required versions.])
972 test -n "$aux_missing" && AC_MSG_WARN([
973 *** These auxiliary programs are missing or incompatible versions:$aux_missing
974 *** some features will be disabled.
975 *** Check the INSTALL file for required versions.])
977 # if using special system headers, find out the compiler's sekrit
978 # header directory and add that to the list. NOTE: Only does the right
979 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
980 if test -n "$sysheaders"; then
981 SYSINCLUDES=-nostdinc
982 for d in include include-fixed; do
983 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
984 SYSINCLUDES="$SYSINCLUDES -isystem $i"
986 SYSINCLUDES="$SYSINCLUDES \
987 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
988 if test -n "$CXX"; then
990 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
991 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
992 for d in include "$cxxmachine/include"; do
993 i=../../../../$d/c++/$cxxversion
994 cxxheaders=`$CXX -print-file-name="$i"` &&
995 test "x$cxxheaders" != x && test "x$i" != "x$cxxheaders" &&
996 CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders \
997 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
1001 AC_SUBST(SYSINCLUDES)
1002 AC_SUBST(CXX_SYSINCLUDES)
1004 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1005 # since this would lead to problems installing/building glibc.
1006 # LD_LIBRARY_PATH contains the current directory if one of the following
1008 # - one of the terminals (":" and ";") is the first or last sign
1009 # - two terminals occur directly after each other
1010 # - the path contains an element with a dot in it
1011 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1013 case ${LD_LIBRARY_PATH} in
1014 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1015 ld_library_path_setting="contains current directory"
1018 ld_library_path_setting="ok"
1022 AC_MSG_RESULT($ld_library_path_setting)
1023 if test "$ld_library_path_setting" != "ok"; then
1025 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1026 *** building glibc. Please change the environment variable
1027 *** and run configure again.])
1030 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1031 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
1032 libc_cv_gcc_static_libgcc=
1034 libc_cv_gcc_static_libgcc=-static-libgcc
1036 AC_SUBST(libc_cv_gcc_static_libgcc)
1038 AC_PATH_PROG(BASH_SHELL, bash, no)
1039 if test "$BASH_SHELL" != no &&
1040 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1041 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1042 libc_cv_have_bash2=yes
1044 libc_cv_have_bash2=no
1046 AC_SUBST(libc_cv_have_bash2)
1048 dnl We need a ksh compatible shell for tzselect.
1049 if test "$BASH_SHELL" = no; then
1050 AC_PATH_PROG(KSH, ksh, no)
1051 if test "$KSH" = no; then
1054 libc_cv_have_ksh=yes
1059 libc_cv_have_ksh=yes
1061 AC_SUBST(libc_cv_have_ksh)
1064 AC_PATH_PROG(PERL, perl, no)
1065 if test "$PERL" != no &&
1066 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1069 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1070 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1071 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1073 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1075 [#define __need_size_t
1076 #define __need_wchar_t
1079 #include <stddef.h>], [size_t size; wchar_t wchar;
1081 #error stddef.h ignored __need_*
1083 if (&size == NULL || &wchar == NULL) abort ();],
1084 libc_cv_friendly_stddef=yes,
1085 libc_cv_friendly_stddef=no)])
1086 if test $libc_cv_friendly_stddef = yes; then
1087 config_vars="$config_vars
1088 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1091 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1092 libc_cv_need_minus_P, [dnl
1093 cat > conftest.S <<EOF
1094 #include "confdefs.h"
1095 /* Nothing whatsoever. */
1097 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1098 libc_cv_need_minus_P=no
1100 libc_cv_need_minus_P=yes
1103 if test $libc_cv_need_minus_P = yes; then
1104 config_vars="$config_vars
1105 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1108 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1109 cat > conftest.s <<EOF
1112 .set glibc_conftest_frobozz,foo
1113 $libc_cv_asm_global_directive glibc_conftest_frobozz
1115 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1116 # (but it doesn't work), so we must do a linking check to be sure.
1117 cat > conftest1.c <<\EOF
1118 extern int glibc_conftest_frobozz;
1119 void _start() { glibc_conftest_frobozz = 1; }
1121 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1122 -nostartfiles -nostdlib \
1123 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1124 libc_cv_asm_set_directive=yes
1126 libc_cv_asm_set_directive=no
1129 if test $libc_cv_asm_set_directive = yes; then
1130 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1133 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1134 libc_cv_asm_unique_object, [dnl
1135 cat > conftest.s <<EOF
1138 .type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
1140 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1141 libc_cv_asm_unique_object=yes
1143 libc_cv_asm_unique_object=no
1146 if test $libc_cv_asm_unique_object = yes; then
1147 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1150 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1151 [cat > conftest.s <<EOF
1154 .symver _sym,sym@VERS
1156 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1157 libc_cv_asm_symver_directive=yes
1159 libc_cv_asm_symver_directive=no
1162 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1163 if test $libc_cv_asm_symver_directive = yes; then
1164 cat > conftest.s <<EOF
1167 .symver _sym,sym@VERS
1169 cat > conftest.map <<EOF
1178 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1179 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1180 -o conftest.so conftest.o
1181 -nostartfiles -nostdlib
1182 -Wl,--version-script,conftest.map
1183 1>&AS_MESSAGE_LOG_FD]);
1185 libc_cv_ld_version_script_option=yes
1187 libc_cv_ld_version_script_option=no
1190 libc_cv_ld_version_script_option=no
1193 libc_cv_ld_version_script_option=no
1196 if test $shared != no &&
1197 test $libc_cv_asm_symver_directive = yes &&
1198 test $libc_cv_ld_version_script_option = yes &&
1199 test $enable_versioning = yes; then
1201 AC_DEFINE(DO_VERSIONING)
1205 AC_SUBST(VERSIONING)
1207 if test $shared != no && test $VERSIONING = no; then
1209 *** WARNING: You should not compile GNU libc without versioning. Not using
1210 *** versioning will introduce incompatibilities so that old binaries
1211 *** will not run anymore.
1212 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1214 AC_CACHE_CHECK(for .previous assembler directive,
1215 libc_cv_asm_previous_directive, [dnl
1216 cat > conftest.s <<EOF
1217 .section foo_section
1220 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1221 libc_cv_asm_previous_directive=yes
1223 libc_cv_asm_previous_directive=no
1226 if test $libc_cv_asm_previous_directive = yes; then
1227 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1229 AC_CACHE_CHECK(for .popsection assembler directive,
1230 libc_cv_asm_popsection_directive, [dnl
1231 cat > conftest.s <<EOF
1232 .pushsection foo_section
1235 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1236 libc_cv_asm_popsection_directive=yes
1238 libc_cv_asm_popsection_directive=no
1241 if test $libc_cv_asm_popsection_directive = yes; then
1242 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1245 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1246 libc_cv_asm_protected_directive, [dnl
1247 cat > conftest.s <<EOF
1253 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1254 libc_cv_asm_protected_directive=yes
1256 AC_MSG_ERROR(assembler support for symbol visibility is required)
1260 if test $libc_cv_asm_protected_directive = yes; then
1261 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1262 libc_cv_visibility_attribute,
1263 [cat > conftest.c <<EOF
1264 int foo __attribute__ ((visibility ("hidden"))) = 1;
1265 int bar __attribute__ ((visibility ("protected"))) = 1;
1267 libc_cv_visibility_attribute=no
1268 if AC_TRY_COMMAND(${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
1270 if grep '\.protected.*bar' conftest.s >/dev/null; then
1271 libc_cv_visibility_attribute=yes
1275 rm -f conftest.{c,s}
1277 if test $libc_cv_visibility_attribute != yes; then
1278 AC_MSG_ERROR(compiler support for visibility attribute is required)
1282 if test $libc_cv_visibility_attribute = yes; then
1283 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1284 libc_cv_broken_visibility_attribute,
1285 [cat > conftest.c <<EOF
1287 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1288 int bar (int x) { return x; }
1290 libc_cv_broken_visibility_attribute=yes
1291 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1293 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1295 libc_cv_broken_visibility_attribute=no
1298 rm -f conftest.c conftest.s
1300 if test $libc_cv_broken_visibility_attribute = yes; then
1301 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1305 AC_CACHE_CHECK(for broken __attribute__((alias())),
1306 libc_cv_broken_alias_attribute,
1307 [cat > conftest.c <<EOF
1308 extern int foo (int x) __asm ("xyzzy");
1309 int bar (int x) { return x; }
1310 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1312 extern __typeof (dfoo) dfoo __asm ("abccb");
1315 libc_cv_broken_alias_attribute=yes
1316 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1317 if grep 'xyzzy' conftest.s >/dev/null &&
1318 grep 'abccb' conftest.s >/dev/null; then
1319 libc_cv_broken_alias_attribute=no
1322 rm -f conftest.c conftest.s
1324 if test $libc_cv_broken_alias_attribute = yes; then
1325 AC_MSG_ERROR(working alias attribute support required)
1328 if test $libc_cv_visibility_attribute = yes; then
1329 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1330 libc_cv_have_sdata_section,
1331 [echo "int i;" > conftest.c
1332 libc_cv_have_sdata_section=no
1333 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1334 | grep '\.sdata' >/dev/null; then
1335 libc_cv_have_sdata_section=yes
1337 rm -f conftest.c conftest.so
1339 if test $libc_cv_have_sdata_section = yes; then
1340 AC_DEFINE(HAVE_SDATA_SECTION)
1344 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1345 libc_cv_initfini_array, [dnl
1346 LIBC_TRY_LINK_STATIC([
1347 int foo (void) { return 1; }
1348 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1350 [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1351 libc_cv_initfini_array=yes
1353 libc_cv_initfini_array=no
1355 [libc_cv_initfini_array=no])
1357 if test $libc_cv_initfini_array != yes; then
1358 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1361 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1362 libc_cv_ctors_header, [dnl
1363 libc_cv_ctors_header=yes
1364 LIBC_TRY_LINK_STATIC([
1365 __attribute__ ((constructor)) void ctor (void) { asm (""); }
1366 __attribute__ ((destructor)) void dtor (void) { asm (""); }
1369 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1370 { gsub(/\@<:@ */, "@<:@") }
1371 $2 == ".ctors" || $2 == ".dtors" {
1372 size = strtonum("0x" $6)
1373 align = strtonum("0x" $NF)
1375 stub@<:@$2@:>@ = size == align * 2
1378 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1379 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1380 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1382 '], [libc_cv_ctors_header=no])
1384 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1387 if test $libc_cv_ctors_header = no; then
1388 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1391 AC_CACHE_CHECK(for libunwind-support in compiler,
1392 libc_cv_cc_with_libunwind, [
1393 cat > conftest.c <<EOF
1394 int main (void) { return 0; }
1396 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1397 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1398 libc_cv_cc_with_libunwind=yes
1400 libc_cv_cc_with_libunwind=no
1403 AC_SUBST(libc_cv_cc_with_libunwind)
1404 if test $libc_cv_cc_with_libunwind = yes; then
1405 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1408 AC_CACHE_CHECK(for -z nodelete option,
1409 libc_cv_z_nodelete, [dnl
1410 cat > conftest.c <<EOF
1411 int _start (void) { return 42; }
1413 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1414 -fPIC -shared -o conftest.so conftest.c
1415 -nostartfiles -nostdlib
1416 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1418 libc_cv_z_nodelete=yes
1420 AC_MSG_ERROR(linker with -z nodelete support required)
1424 AC_CACHE_CHECK(for -z nodlopen option,
1425 libc_cv_z_nodlopen, [dnl
1426 cat > conftest.c <<EOF
1427 int _start (void) { return 42; }
1429 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1430 -fPIC -shared -o conftest.so conftest.c
1431 -nostartfiles -nostdlib
1432 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1434 libc_cv_z_nodlopen=yes
1436 AC_MSG_ERROR(linker with -z nodlopen support required)
1440 AC_CACHE_CHECK(for -z initfirst option,
1441 libc_cv_z_initfirst, [dnl
1442 cat > conftest.c <<EOF
1443 int _start (void) { return 42; }
1445 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1446 -fPIC -shared -o conftest.so conftest.c
1447 -nostartfiles -nostdlib
1448 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1450 libc_cv_z_initfirst=yes
1452 AC_MSG_ERROR(linker with -z initfirst support required)
1456 # Add-on fragments can set these for other machines.
1457 libc_commonpagesize=${libc_commonpagesize:-no}
1458 libc_relro_required=${libc_relro_required:-no}
1459 case "$base_machine" in
1460 i[[34567]]86 | x86_64 | powerpc* | s390*)
1461 libc_commonpagesize=0x1000
1462 libc_relro_required=yes
1465 libc_commonpagesize=0x2000
1466 libc_relro_required=yes
1470 if test $libc_commonpagesize != no; then
1471 AC_CACHE_CHECK(for -z relro option,
1472 libc_cv_z_relro, [dnl
1474 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1475 int _start (void) { return 42; }
1476 extern void _exit (int);
1477 /* Since these pointers are const, they should go in rodata.
1478 Since they refer to functions that have to be resolved by
1479 dynamic linking, they should instead go in RELRO data. */
1480 const void *const relro[] = { &_start, &_exit, 0 };
1481 /* GNU ld fails to produce RELRO data when it's very small and there is no
1482 normal writable data following it, or if only uninitialized (.bss) data
1483 follows it, or only very small writable data. */
1484 int data[0x10000] = { 1, };
1486 cat > conftest.awk <<\EOF
1489 commonpagesize = strtonum(commonpagesize)
1491 { print "LINE:", $0 > "/dev/stderr" }
1493 vaddr = strtonum($3)
1494 memsz = strtonum($6)
1496 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1497 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1498 result = (end % commonpagesize == 0) ? "yes" : "broken"
1500 END { print result }
1502 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1503 -fPIC -shared -o conftest.so conftest.c
1504 -nostartfiles -nostdlib
1505 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1506 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1508 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1509 conftest.ph > conftest.cps
1511 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1513 if { test "x$libc_relro_required" = xyes &&
1514 test "x$libc_cv_z_relro" != xyes
1517 AC_MSG_ERROR(linker with -z relro support required)
1520 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1523 AC_CACHE_CHECK(for -Bgroup option,
1524 libc_cv_Bgroup, [dnl
1525 cat > conftest.c <<EOF
1526 int _start (void) { return 42; }
1528 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1529 -fPIC -shared -o conftest.so conftest.c
1530 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1537 AC_SUBST(libc_cv_Bgroup)
1539 AC_CACHE_CHECK(for libgcc_s suffix,
1540 libc_cv_libgcc_s_suffix, [dnl
1541 cat > conftest.c <<EOF
1542 int main (void) { return 0; }
1545 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1546 -fPIC -shared -shared-libgcc -o conftest.so \
1547 conftest.c -v 2>&1 >/dev/null \
1548 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1551 AC_SUBST(libc_cv_libgcc_s_suffix)
1553 AC_CACHE_CHECK(for --as-needed option,
1554 libc_cv_as_needed, [dnl
1555 cat > conftest.c <<EOF
1556 int main (void) { return 0; }
1558 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1559 -fPIC -shared -o conftest.so conftest.c
1560 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1561 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1563 libc_cv_as_needed=yes
1565 libc_cv_as_needed=no
1568 AC_SUBST(libc_cv_as_needed)
1571 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1572 libc_cv_as_noexecstack, [dnl
1573 cat > conftest.c <<EOF
1576 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1577 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1578 && grep -q .note.GNU-stack conftest.s \
1579 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1580 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1582 libc_cv_as_noexecstack=yes
1584 libc_cv_as_noexecstack=no
1587 if test $libc_cv_as_noexecstack = yes; then
1588 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1590 AC_SUBST(ASFLAGS_config)
1592 AC_CACHE_CHECK(for -z combreloc,
1593 libc_cv_z_combreloc, [dnl
1594 cat > conftest.c <<EOF
1595 extern int bar (int);
1597 int foo (void) { return bar (mumble); }
1599 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1600 -fPIC -shared -o conftest.so conftest.c
1601 -nostdlib -nostartfiles
1602 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1604 dnl The following test is a bit weak. We must use a tool which can test
1605 dnl cross-platform since the gcc used can be a cross compiler. Without
1606 dnl introducing new options this is not easily doable. Instead use a tool
1607 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1608 dnl look for a section named .rel.dyn.
1609 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1610 libc_cv_z_combreloc=yes
1612 libc_cv_z_combreloc=no
1615 libc_cv_z_combreloc=no
1618 if test "$libc_cv_z_combreloc" = yes; then
1619 AC_DEFINE(HAVE_Z_COMBRELOC)
1621 AC_SUBST(libc_cv_z_combreloc)
1623 AC_CACHE_CHECK(for -z execstack,
1624 libc_cv_z_execstack, [dnl
1625 cat > conftest.c <<EOF
1626 int _start (void) { return 42; }
1628 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1629 -fPIC -shared -o conftest.so conftest.c
1630 -Wl,-z,execstack -nostdlib
1631 1>&AS_MESSAGE_LOG_FD])
1633 libc_cv_z_execstack=yes
1635 libc_cv_z_execstack=no
1638 AC_SUBST(libc_cv_z_execstack)
1640 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1641 cat > conftest.c <<EOF
1643 main () { return 0;}
1645 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1646 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1654 AC_SUBST(libc_cv_fpie)
1656 AC_CACHE_CHECK(for --hash-style option,
1657 libc_cv_hashstyle, [dnl
1658 cat > conftest.c <<EOF
1659 int _start (void) { return 42; }
1661 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1662 -fPIC -shared -o conftest.so conftest.c
1663 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1665 libc_cv_hashstyle=yes
1667 libc_cv_hashstyle=no
1670 AC_SUBST(libc_cv_hashstyle)
1672 # The linker's default -shared behavior is good enough if it
1673 # does these things that our custom linker scripts ensure that
1674 # all allocated NOTE sections come first.
1675 if test "$use_default_link" = default; then
1676 AC_CACHE_CHECK([for sufficient default -shared layout],
1677 libc_cv_use_default_link, [dnl
1678 libc_cv_use_default_link=no
1679 cat > conftest.s <<\EOF
1680 .section .note.a,"a",%note
1685 .section .note.b,"a",%note
1691 if AC_TRY_COMMAND([dnl
1692 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1693 ac_try=`$READELF -S conftest.so | sed -n \
1695 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1701 libc_seen_a=no libc_seen_b=no
1703 while test $# -ge 2 -a "$1" = NOTE; do
1705 .note.a) libc_seen_a=yes ;;
1706 .note.b) libc_seen_b=yes ;;
1710 case "$libc_seen_a$libc_seen_b" in
1712 libc_cv_use_default_link=yes
1715 echo >&AS_MESSAGE_LOG_FD "\
1716 $libc_seen_a$libc_seen_b from:
1722 use_default_link=$libc_cv_use_default_link
1725 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1726 if libc_cv_output_format=`
1727 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1731 libc_cv_output_format=
1733 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1734 AC_SUBST(libc_cv_output_format)
1736 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1737 cat > conftest.c <<EOF
1740 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1741 conftest.c 1>&AS_MESSAGE_LOG_FD])
1743 libc_cv_fno_toplevel_reorder=yes
1745 libc_cv_fno_toplevel_reorder=no
1748 if test $libc_cv_fno_toplevel_reorder = yes; then
1749 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1751 fno_unit_at_a_time=-fno-unit-at-a-time
1753 AC_SUBST(fno_unit_at_a_time)
1755 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1756 cat > conftest.c <<EOF
1758 main () { return 0;}
1760 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
1761 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1768 AC_SUBST(libc_cv_ssp)
1770 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1771 cat > conftest.c <<EOF
1773 #ifdef __GNUC_GNU_INLINE__
1774 main () { return 0;}
1779 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1780 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1782 libc_cv_gnu89_inline=yes
1784 libc_cv_gnu89_inline=no
1787 if test $libc_cv_gnu89_inline = yes; then
1788 gnu89_inline=-fgnu89-inline
1792 AC_SUBST(gnu89_inline)
1794 AC_CACHE_CHECK(whether cc puts quotes around section names,
1795 libc_cv_have_section_quotes,
1796 [cat > conftest.c <<EOF
1797 static const int foo
1798 __attribute__ ((section ("bar"))) = 1;
1800 if ${CC-cc} -S conftest.c -o conftest.s; then
1801 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1802 libc_cv_have_section_quotes=yes
1804 libc_cv_have_section_quotes=no
1807 libc_cv_have_section_quotes=unknown
1809 rm -f conftest.{c,s}
1811 if test $libc_cv_have_section_quotes = yes; then
1812 AC_DEFINE(HAVE_SECTION_QUOTES)
1815 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1817 cat > conftest.s <<EOF
1819 ${libc_cv_asm_global_directive} foo
1822 .weak bar; bar = foo
1824 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1825 libc_cv_asm_weak_directive=yes
1827 libc_cv_asm_weak_directive=no
1831 if test $libc_cv_asm_weak_directive = no; then
1832 AC_CACHE_CHECK(for assembler .weakext directive,
1833 libc_cv_asm_weakext_directive,
1835 cat > conftest.s <<EOF
1837 ${libc_cv_asm_global_directive} foo
1841 ${libc_cv_asm_global_directive} baz
1844 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1845 libc_cv_asm_weakext_directive=yes
1847 libc_cv_asm_weakext_directive=no
1853 if test $libc_cv_asm_weak_directive = yes; then
1854 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1855 elif test $libc_cv_asm_weakext_directive = yes; then
1856 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1859 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1861 sparc/sparc64*) cfi_offset=2047;;
1864 cat > conftest.s <<EOF
1866 .type func,%function
1870 .cfi_rel_offset 1, $cfi_offset
1873 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1874 libc_cv_asm_cfi_directives=yes
1876 libc_cv_asm_cfi_directives=no
1879 if test $libc_cv_asm_cfi_directives = yes; then
1880 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1883 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1884 cat > conftest.c <<\EOF
1889 dnl No \ in command here because it ends up inside ''.
1890 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1891 -nostdlib -nostartfiles -Wl,--no-whole-archive
1892 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1893 libc_cv_ld_no_whole_archive=yes
1895 libc_cv_ld_no_whole_archive=no
1898 if test $libc_cv_ld_no_whole_archive = no; then
1899 AC_MSG_ERROR([support for --no-whole-archive is needed])
1902 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1903 cat > conftest.c <<\EOF
1908 dnl No \ in command here because it ends up inside ''.
1909 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1910 -nostdlib -nostartfiles -fexceptions
1911 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1912 libc_cv_gcc_exceptions=yes
1914 libc_cv_gcc_exceptions=no
1917 if test $libc_cv_gcc_exceptions = yes; then
1918 exceptions=-fexceptions
1920 AC_SUBST(exceptions)dnl
1922 if test "$host_cpu" = powerpc ; then
1923 # Check for a bug present in at least versions 2.8.x of GCC
1924 # and versions 1.0.x of EGCS.
1925 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1926 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1927 libc_cv_c_asmcr0_bug='no',
1928 libc_cv_c_asmcr0_bug='yes')])
1929 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1930 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1934 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1935 cat > conftest.c <<\EOF
1938 __builtin_memset (x, 0, 1000);
1942 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1944 libc_cv_gcc_builtin_memset=no
1946 libc_cv_gcc_builtin_memset=yes
1949 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1950 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1953 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1954 cat > conftest.c <<\EOF
1955 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1956 char *foo (const char *a, const char *b)
1958 return __builtin_strstr (a, b);
1962 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1964 libc_cv_gcc_builtin_redirection=yes
1966 libc_cv_gcc_builtin_redirection=no
1969 if test "$libc_cv_gcc_builtin_redirection" = no; then
1970 AC_MSG_ERROR([support for the symbol redirection needed])
1973 dnl Check whether the compiler supports the __thread keyword.
1974 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1975 [cat > conftest.c <<\EOF
1976 __thread int a = 42;
1978 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1979 libc_cv_gcc___thread=yes
1981 libc_cv_gcc___thread=no
1984 if test "$libc_cv_gcc___thread" = no; then
1985 AC_MSG_ERROR([support for the __thread keyword is required])
1988 dnl Check whether the compiler supports the tls_model attribute.
1989 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1990 cat > conftest.c <<\EOF
1991 extern __thread int a __attribute__((tls_model ("initial-exec")));
1993 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1994 libc_cv_gcc_tls_model_attr=yes
1996 libc_cv_gcc_tls_model_attr=no
1999 if test "$libc_cv_gcc_tls_model_attr" = no; then
2000 AC_MSG_ERROR([support for the tls_model attribute is required])
2003 if test -n "$submachine"; then
2004 AC_CACHE_CHECK([for compiler option for CPU variant],
2005 libc_cv_cc_submachine, [dnl
2006 libc_cv_cc_submachine=no
2007 for opt in "-march=$submachine" "-mcpu=$submachine"; do
2008 if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
2009 libc_cv_cc_submachine="$opt"
2013 if test "x$libc_cv_cc_submachine" = xno; then
2014 AC_MSG_ERROR([${CC-cc} does not support $submachine])
2017 AC_SUBST(libc_cv_cc_submachine)
2019 dnl Check whether we have the gd library available.
2020 AC_MSG_CHECKING(for libgd)
2021 if test "$with_gd" != "no"; then
2022 old_CFLAGS="$CFLAGS"
2023 CFLAGS="$CFLAGS $libgd_include"
2024 old_LDFLAGS="$LDFLAGS"
2025 LDFLAGS="$LDFLAGS $libgd_ldflags"
2027 LIBS="$LIBS -lgd -lpng -lz -lm"
2028 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
2029 CFLAGS="$old_CFLAGS"
2030 LDFLAGS="$old_LDFLAGS"
2035 AC_MSG_RESULT($LIBGD)
2039 if test x$with_selinux = xno ; then
2042 # See if we have the SELinux library
2043 AC_CHECK_LIB(selinux, is_selinux_enabled,
2044 have_selinux=yes, have_selinux=no)
2045 # See if we have the SELinux header with the NSCD permissions in it.
2046 if test x$have_selinux = xyes ; then
2047 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
2048 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
2049 [#ifdef NSCD__SHMEMHOST
2052 #error NSCD__SHMEMHOST not defined
2054 have_selinux=yes, have_selinux=no)
2055 AC_MSG_RESULT($have_selinux)
2058 if test x$with_selinux = xyes ; then
2059 if test x$have_selinux = xno ; then
2060 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
2064 # Check if we're building with SELinux support.
2065 if test "x$have_selinux" = xyes; then
2066 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2068 # See if we have the libaudit library
2069 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2070 have_libaudit=yes, have_libaudit=no)
2071 if test "x$have_libaudit" = xyes; then
2072 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2074 AC_SUBST(have_libaudit)
2076 # See if we have the libcap library
2077 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2078 if test "x$have_libcap" = xyes; then
2079 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2081 AC_SUBST(have_libcap)
2083 AC_SUBST(have_selinux)
2085 dnl check for the size of 'long double'.
2086 AC_CHECK_SIZEOF(long double, 0)
2087 sizeof_long_double=$ac_cv_sizeof_long_double
2088 AC_SUBST(sizeof_long_double)
2090 ### End of automated tests.
2091 ### Now run sysdeps configure fragments.
2093 # They also can set these variables.
2095 ldd_rewrite_script=no
2096 libc_cv_sysconfdir=$sysconfdir
2097 libc_cv_gcc_unwind_find_fde=no
2100 # Iterate over all the sysdep directories we will use, running their
2101 # configure fragments.
2102 for dir in $sysnames; do
2105 *) dest=$srcdir/$dir ;;
2107 if test -r $dest/configure; then
2108 AC_MSG_RESULT(running configure fragment for $dir)
2113 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2114 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2116 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2118 # Test for old glibc 2.0.x headers so that they can be removed properly
2119 # Search only in includedir.
2120 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2121 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2123 old_glibc_headers=yes
2125 old_glibc_headers=no
2127 AC_MSG_RESULT($old_glibc_headers)
2128 if test ${old_glibc_headers} = yes; then
2129 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2130 AC_MSG_WARN(*** be removed.)
2132 AC_SUBST(old_glibc_headers)
2134 AC_SUBST(libc_cv_slibdir)
2135 AC_SUBST(libc_cv_localedir)
2136 AC_SUBST(libc_cv_sysconfdir)
2137 AC_SUBST(libc_cv_rootsbindir)
2138 AC_SUBST(libc_cv_forced_unwind)
2140 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2141 AC_SUBST(libc_cv_cpp_asm_debuginfo)
2142 AC_SUBST(libc_cv_cc_sse4)
2143 AC_SUBST(libc_cv_cc_avx)
2144 AC_SUBST(libc_cv_cc_sse2avx)
2145 AC_SUBST(libc_cv_cc_novzeroupper)
2146 AC_SUBST(libc_cv_cc_fma4)
2147 AC_SUBST(libc_cv_as_i686)
2148 AC_SUBST(libc_cv_sparc_as_vis3)
2150 AC_SUBST(use_ldconfig)
2151 AC_SUBST(ldd_rewrite_script)
2156 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2157 [libc_cv_pic_default=yes
2158 cat > conftest.c <<EOF
2159 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2160 # error PIC is default.
2163 if eval "${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']])