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=$enableval],
113 [enable_check_abi=no])
115 dnl Arguments to enable or disable building the static, shared, profiled,
116 dnl and -fomit-frame-pointer libraries.
117 dnl I've disabled this for now since we cannot build glibc without static
118 dnl libraries built in the moment.
119 dnl AC_ARG_ENABLE([static],
120 dnl AC_HELP_STRING([--enable-static],
121 dnl [build static library @<:@default=yes@:>@]),
122 dnl [static=$enableval],
125 AC_ARG_ENABLE([shared],
126 AC_HELP_STRING([--enable-shared],
127 [build shared library @<:@default=yes if GNU ld@:>@]),
130 AC_ARG_ENABLE([profile],
131 AC_HELP_STRING([--enable-profile],
132 [build profiled library @<:@default=no@:>@]),
133 [profile=$enableval],
135 AC_ARG_ENABLE([versioning],
136 AC_HELP_STRING([--disable-versioning],
137 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
138 [enable_versioning=$enableval],
139 [enable_versioning=yes])
141 AC_ARG_ENABLE([oldest-abi],
142 AC_HELP_STRING([--enable-oldest-abi=ABI],
143 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
144 [oldest_abi=$enableval],
146 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
149 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
153 AC_ARG_ENABLE([stackguard-randomization],
154 AC_HELP_STRING([--enable-stackguard-randomization],
155 [initialize __stack_chk_guard canary with a random number at program start]),
156 [enable_stackguard_randomize=$enableval],
157 [enable_stackguard_randomize=no])
158 if test "$enable_stackguard_randomize" = yes; then
159 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
162 dnl Generic infrastructure for drop-in additions to libc.
163 AC_ARG_ENABLE([add-ons],
164 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
165 [configure and build add-ons in DIR1,DIR2,...
166 search for add-ons if no parameter given]),
167 , [enable_add_ons=yes])
169 AC_ARG_ENABLE([hidden-plt],
170 AC_HELP_STRING([--disable-hidden-plt],
171 [do not hide internal function calls to avoid PLT]),
174 if test "x$hidden" = xno; then
178 AC_ARG_ENABLE([bind-now],
179 AC_HELP_STRING([--enable-bind-now],
180 [disable lazy relocations in DSOs]),
181 [bindnow=$enableval],
185 dnl On some platforms we cannot use dynamic loading. We must provide
186 dnl static NSS modules.
187 AC_ARG_ENABLE([static-nss],
188 AC_HELP_STRING([--enable-static-nss],
189 [build static NSS modules @<:@default=no@:>@]),
190 [static_nss=$enableval],
192 dnl Enable static NSS also if we build no shared objects.
193 if test x"$static_nss" = xyes || test x"$shared" = xno; then
195 AC_DEFINE(DO_STATIC_NSS)
198 AC_ARG_ENABLE([force-install],
199 AC_HELP_STRING([--disable-force-install],
200 [don't force installation of files from this package, even if they are older than the installed files]),
201 [force_install=$enableval],
203 AC_SUBST(force_install)
205 dnl On some platforms we allow dropping compatibility with all kernel
207 AC_ARG_ENABLE([kernel],
208 AC_HELP_STRING([--enable-kernel=VERSION],
209 [compile for compatibility with kernel not older than VERSION]),
210 [minimum_kernel=$enableval],
212 dnl Prevent unreasonable values.
213 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
214 # Better nothing than this.
217 if test "$minimum_kernel" = current; then
218 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
222 dnl For the development we sometimes want gcc to issue even more warnings.
223 dnl This is not the default since many of the extra warnings are not
225 AC_ARG_ENABLE([all-warnings],
226 AC_HELP_STRING([--enable-all-warnings],
227 [enable all useful warnings gcc can issue]),
228 [all_warnings=$enableval],
230 AC_SUBST(all_warnings)
232 AC_ARG_ENABLE([multi-arch],
233 AC_HELP_STRING([--enable-multi-arch],
234 [enable single DSO with optimizations for multiple architectures]),
235 [multi_arch=$enableval],
236 [multi_arch=default])
238 AC_ARG_ENABLE([nss-crypt],
239 AC_HELP_STRING([--enable-nss-crypt],
240 [enable libcrypt to use nss]),
241 [nss_crypt=$enableval],
243 if test x$nss_crypt = xyes; then
244 nss_includes=-I$(nss-config --includedir 2>/dev/null)
245 if test $? -ne 0; then
246 AC_MSG_ERROR([cannot find include directory with nss-config])
249 CFLAGS="$CFLAGS $nss_includes"
250 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
252 #include <nsslowhash.h>
253 void f (void) { NSSLOW_Init (); }])],
254 libc_cv_nss_crypt=yes,
256 cannot find NSS headers with lowlevel hash function interfaces]))
258 LIBS="$LIBS -lfreebl3"
259 AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
261 #include <nsslowhash.h>],
263 libc_cv_nss_crypt=yes,
265 cannot link program using lowlevel NSS hash functions]))
271 AC_SUBST(libc_cv_nss_crypt)
273 # The way shlib-versions is used to generate soversions.mk uses a
274 # fairly simplistic model for name recognition that can't distinguish
275 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
276 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
277 # tell. This doesn't get used much beyond that, so it's fairly safe.
282 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
286 # We keep the original values in `$config_*' and never modify them, so we
287 # can write them unchanged into config.make. Everything else uses
288 # $machine, $vendor, and $os, and changes them whenever convenient.
289 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
291 # Don't allow vendor == "unknown"
292 test "$config_vendor" = unknown && config_vendor=
293 config_os="`echo $config_os | sed 's/^unknown-//'`"
295 # Some configurations imply other options.
298 # The configure fragment of an add-on port can modify these to supplement
299 # or override the table in the case statement below. No fragment should
300 # ever change the config_* variables, however.
301 machine=$config_machine
302 vendor=$config_vendor
306 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
308 if test "$machine" = rs6000; then
312 # Braindead PowerPC box with absolutely no FPU.
313 case "$machine-$host_os" in
321 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
324 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
326 *) submachine="$withval" ;;
330 # An add-on can set this when it wants to disable the sanity check below.
333 dnl Having this here, though empty, makes sure that if add-ons' fragments
334 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
335 dnl our AC_OUTPUT will actually use it.
338 case "$enable_add_ons" in
341 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
342 sed 's@/[[^/]]*$@@' | sort | uniq`
343 add_ons_automatic=yes
345 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
346 add_ons_automatic=no ;;
352 if test x"$add_ons" != x; then
353 for f in $add_ons; do
358 *** It seems that you're using an old \`crypt' add-on. crypt is now
359 *** part of glibc and using the old add-on will not work with this
360 *** release. Start again with fresh sources and without the old
361 *** \`crypt' add-on.])
365 *** It seems that you're using an old \`localedata' add-on. localedata
366 *** is now part of glibc and using the old add-on will not work with
367 *** this release. Start again with fresh sources and without the old
368 *** \`localedata' add-on.])
373 # Now source each add-on's configure fragment.
374 # The fragments can use $srcdir/$libc_add_on to find themselves,
375 # and test $add_ons_automatic to see if they were explicitly requested.
376 # A fragment can clear (or even change) $libc_add_on to affect
377 # whether it goes into the list to be actually used in the build.
379 for libc_add_on in $add_ons; do
380 # Test whether such a directory really exists.
381 # It can be absolute, or relative to $srcdir, or relative to the build dir.
382 case "$libc_add_on" in
384 libc_add_on_srcdir=$libc_add_on
387 test -d "$srcdir/$libc_add_on" || {
388 if test -d "$libc_add_on"; then
389 libc_add_on="`pwd`/$libc_add_on"
391 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
394 libc_add_on_srcdir=$srcdir/$libc_add_on
398 libc_add_on_frag=$libc_add_on_srcdir/configure
399 libc_add_on_canonical=
400 libc_add_on_config_subdirs=
401 if test -r "$libc_add_on_frag"; then
402 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
403 libc_add_on_canonical=unknown
405 . "$libc_add_on_frag"
406 test -z "$libc_add_on" || {
407 configured_add_ons="$configured_add_ons $libc_add_on"
408 if test "x$libc_add_on_canonical" = xunknown; then
409 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
411 for d in $libc_add_on_subdirs; do
412 case "$libc_add_on" in
413 /*) subdir_srcdir="$libc_add_on" ;;
414 *) subdir_srcdir="\$(..)$libc_add_on" ;;
418 d="${libc_add_on_canonical:-$libc_add_on}"
424 subdir_srcdir="$subdir_srcdir/$d"
427 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
428 add_on_subdirs="$add_on_subdirs $d"
429 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
430 $d-srcdir = $subdir_srcdir"
432 for d in $libc_add_on_config_subdirs; do
435 fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
437 if test ! -d "$libc_add_on_srcdir/$d"; then
438 AC_MSG_ERROR(fragment wants to configure missing directory $d)
440 case "$libc_add_on" in
442 relative path required for add-on using \$libc_add_on_config_subdirs) ;;
444 subdirs="$subdirs $libc_add_on/$d"
448 if test -n "$libc_add_on"; then
449 if frags=`ls -d $libc_add_on_srcdir/sysdeps/*/preconfigure 2> /dev/null`
451 AC_MSG_CHECKING(add-on $libc_add_on for preconfigure fragments)
452 for frag in $frags; do
453 name=`echo "$frag" | sed 's@/[[^/]]*$@@;s@^.*/@@'`
454 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
459 use_add_ons="$use_add_ons $libc_add_on"
460 add_ons_pfx="$add_ons_pfx $libc_add_on/"
461 test -z "$libc_add_on_canonical" ||
462 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
465 # Use echo to strip excess whitespace.
466 add_ons="`echo $use_add_ons`"
469 AC_SUBST(add_on_subdirs)
473 ### I put this here to prevent those annoying emails from people who cannot
474 ### read and try to compile glibc on unsupported platforms. --drepper
476 ### By using the undocumented --enable-hacker-mode option for configure
477 ### one can skip this test to make the configuration not fail for unsupported
480 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
481 case "$machine-$host_os" in
482 *-linux* | *-gnu* | arm*-none*)
485 echo "*** The GNU C library is currently not available for this platform."
486 echo "*** So far nobody cared to port it and if there is no volunteer it"
487 echo "*** might never happen. So, if you have interest to see glibc on"
488 echo "*** this platform visit"
489 echo "*** http://www.gnu.org/software/libc/porting.html"
490 echo "*** and join the group of porters"
496 dnl We need to use [ and ] for other purposes for a while now.
498 # Expand the configuration machine name into a subdirectory by architecture
499 # type and particular chip. If an add-on configure fragment already set
500 # base_machine, we don't change it.
501 test -n "$base_machine" || case "$machine" in
502 i[34567]86) base_machine=i386 machine=i386/$machine ;;
503 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
504 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
505 s390) base_machine=s390 machine=s390/s390-32 ;;
506 s390x) base_machine=s390 machine=s390/s390-64 ;;
507 sh3*) base_machine=sh machine=sh/sh3 ;;
508 sh4*) base_machine=sh machine=sh/sh4 ;;
510 base_machine=sparc machine=sparc/sparc32 ;;
511 sparcv8 | supersparc | hypersparc)
512 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
513 sparcv8plus | sparcv8plusa | sparcv9)
514 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
515 sparcv8plusb | sparcv9b)
516 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
518 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
520 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
522 base_machine=sparc machine=sparc/sparc64 ;;
524 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
526 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
528 base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
529 *) base_machine=$machine ;;
532 AC_SUBST(base_machine)
534 if test "$base_machine" = "i386"; then
535 AC_DEFINE(USE_REGPARMS)
538 # For the multi-arch option we need support in the assembler.
539 AC_CACHE_CHECK([for assembler gnu_indirect_function symbol type support],
540 libc_cv_asm_gnu_indirect_function, [dnl
541 cat > conftest.s <<EOF
542 .type foo,%gnu_indirect_function
544 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD;
546 libc_cv_asm_gnu_indirect_function=yes
548 libc_cv_asm_gnu_indirect_function=no
552 AC_MSG_CHECKING(whether .text pseudo-op must be used)
553 AC_CACHE_VAL(libc_cv_dot_text, [dnl
554 cat > conftest.s <<EOF
558 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
559 libc_cv_dot_text=.text
562 if test -z "$libc_cv_dot_text"; then
568 AC_CACHE_CHECK(for assembler global-symbol directive,
569 libc_cv_asm_global_directive, [dnl
570 libc_cv_asm_global_directive=UNKNOWN
571 for ac_globl in .globl .global .EXPORT; do
572 cat > conftest.s <<EOF
577 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
578 libc_cv_asm_global_directive=${ac_globl}
581 test $libc_cv_asm_global_directive != UNKNOWN && break
583 if test $libc_cv_asm_global_directive = UNKNOWN; then
584 AC_MSG_ERROR(cannot determine asm global directive)
586 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
589 AC_CACHE_CHECK(for assembler .type directive prefix,
590 libc_cv_asm_type_prefix, [dnl
591 libc_cv_asm_type_prefix=no
592 for ac_try_prefix in '@' '%' '#'; do
593 cat > conftest.s <<EOF
595 ${libc_cv_asm_global_directive} foo
596 .type foo, ${ac_try_prefix}object
601 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
602 libc_cv_asm_type_prefix=${ac_try_prefix}
605 test "x$libc_cv_asm_type_prefix" != xno && break
607 if test "x$libc_cv_asm_type_prefix" != xno; then
608 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
611 if test x"$libc_cv_asm_gnu_indirect_function" != xyes -a x"$libc_cv_asm_type_prefix" = xno; then
612 if test x"$multi_arch" = xyes; then
613 AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
618 if test x"$multi_arch" != xno; then
619 multi_arch_d=/multiarch
622 # Compute the list of sysdep directories for this configuration.
623 # This can take a while to compute.
624 sysdep_dir=$srcdir/sysdeps
625 AC_MSG_CHECKING(sysdep dirs)
626 dnl We need to use [ and ] for other purposes for a while now.
628 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
629 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
631 test "x$base_os" != x || case "$os" in
634 netbsd* | 386bsd* | freebsd* | bsdi*)
635 base_os=unix/bsd/bsd4.4 ;;
636 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
638 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
641 base_os=unix/sysv/irix6/$os ;;
643 base_os=unix/sysv/sysv4 ;;
645 base_os=standalone ;;
648 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
651 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
655 o=`echo $tail | sed 's/[0-9]*$//'`
656 if test $o != $tail; then
659 # For linux-gnu, try linux-gnu, then linux.
660 o=`echo $tail | sed 's/-.*$//'`
661 if test $o != $tail; then
665 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
668 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
674 # For sparc/sparc32, try sparc/sparc32 and then sparc.
676 tail=$machine${submachine:+/$submachine}
677 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
679 # Prepend the machine's FPU directory unless --without-fp.
680 if test "$with_fp" = yes; then
683 mach="$mach /$1/nofpu"
689 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
692 # Find what sysdep directories exist.
695 for b in $base ''; do
696 for m0 in $mach ''; do
697 for v in /$vendor ''; do
698 test "$v" = / && continue
699 for o in /$ostry ''; do
700 test "$o" = / && continue
701 for m in $multi_arch_d $mach ''; do
702 for d in $add_ons_pfx ''; do
703 for a in $add_ons_sfx ''; do
704 if test -n "$m0$m0sub$b$v$o$m$msub"; then
705 try_srcdir="${srcdir}/"
709 try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
710 test -n "$enable_debug_configure" &&
711 echo "$0 [DEBUG]: try $try" >&2
712 if test -d "$try_srcdir$try"; then
713 sysnames="$sysnames $try"
714 { test -n "$o" || test -n "$b"; } && os_used=t
715 { test -n "$m" || test -n "$m0"; } && machine_used=t
717 x*/$submachine) submachine_used=t ;;
719 if test -n "$d"; then
720 case "$sysnames_add_ons" in
722 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
735 # If the assembler supports gnu_indirect_function symbol type and the
736 # architecture supports multi-arch, we enable multi-arch by default.
737 case $sysnames_add_ons$sysnames in
741 test x"$multi_arch" = xdefault && multi_arch=no
744 if test x"$multi_arch" != xno; then
745 AC_DEFINE(USE_MULTIARCH)
749 if test -z "$os_used" && test "$os" != none; then
750 AC_MSG_ERROR(Operating system $os is not supported.)
752 if test -z "$machine_used" && test "$machine" != none; then
753 AC_MSG_ERROR(The $machine is not supported.)
755 if test -z "$submachine_used" && test -n "$submachine"; then
756 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
760 # We have now validated the configuration.
763 # Look for an `elf' subdirectory of each machine directory.
764 # We prepend these rather than inserting them whereever the machine appears
765 # because things specified by the machine's ELF ABI should override
766 # OS-specific things, and should always be the same for any OS on the
767 # machine (otherwise what's the point of an ABI?).
769 for d in $add_ons_pfx ''; do
771 if test -d $srcdir/${d}sysdeps$m/elf; then
772 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
776 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
779 # Expand the list of system names into a full list of directories
780 # from each element's parent name and Implies file (if present).
783 while test $# -gt 0; do
787 case " $names " in *" $name "*)
788 # Already in the list.
792 # Report each name as we discover it, so there is no long pause in output.
793 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
795 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
799 *) xsrcdir=$srcdir/ ;;
801 test -n "$enable_debug_configure" &&
802 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
804 if test -f $xsrcdir$name/Implies; then
805 # Collect more names from the `Implies' file (removing comments).
806 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
808 for x in $implied_candidate; do
810 if test -d $xsrcdir$name_base/$x; then
811 implied="$implied $name_base/$x";
814 for d in $add_ons_pfx ''; do
818 *) try_srcdir=$srcdir/ ;;
820 test -n "$enable_debug_configure" &&
821 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
822 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
824 implied="$implied $try"
826 case "$sysnames_add_ons" in
828 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
832 if test $found = no; then
833 AC_MSG_WARN($name/Implies specifies nonexistent $x)
840 # Add NAME to the list of names.
843 # Find the parent of NAME, using the empty string if it has none.
845 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
848 # Add the names implied by NAME, and NAME's parent (if it has one), to
849 # the list of names to be processed (the argument list). We prepend the
850 # implied names to the list and append the parent. We want implied
851 # directories to come before further directories inferred from the
852 # configuration components; this ensures that for sysv4, unix/common
853 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
855 sysnames="`echo $implied $* $parent`"
856 test -n "$sysnames" && set $sysnames
859 # Add the default directories.
860 default_sysnames="sysdeps/generic/elf sysdeps/generic"
861 sysnames="$names $default_sysnames"
863 # The other names were emitted during the scan.
864 AC_MSG_RESULT($default_sysnames)
866 # Collect the list of add-ons that supply partial sysdeps trees.
868 for add_on in $add_ons; do
871 *) xsrcdir="$srcdir/" ;;
874 test -d "$xsrcdir$add_on/sysdeps" || {
875 case "$configured_add_ons " in
878 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
884 sysdeps_add_ons="$sysdeps_add_ons $add_on"
885 case "$sysnames_add_ons" in
888 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
893 for d in $sysnames; do
895 $add_on/sysdeps/*) ;;
898 (cd "$xsrcdir$d" && for f in *[[!~]]; do
902 test -d "$ff" || { test -e "$ff" && exit 88; }
906 test -d "$f" || { test -e "$f" && exit 88; }
910 if test $? -eq 88; then
915 if test $found = no; then
916 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
919 AC_SUBST(sysdeps_add_ons)
925 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
926 # The makefiles need to use a different form to find it in $srcdir.
927 INSTALL='\$(..)./scripts/install-sh -c'
932 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
934 # Accept binutils 2.13 or newer.
935 AC_CHECK_PROG_VER(AS, $AS, --version,
936 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
937 [2.1[3-9]*|2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as")
938 AC_CHECK_PROG_VER(LD, $LD, --version,
939 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
940 [2.1[3-9]*|2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
942 # We need the physical current working directory. We cannot use the
943 # "pwd -P" shell builtin since that's not portable. Instead we try to
944 # find a pwd binary. Note that assigning to the PWD environment
945 # variable might have some interesting side effects, so we don't do
947 AC_PATH_PROG(PWD_P, pwd, no)
948 if test "$PWD_P" = no; then
949 AC_MSG_ERROR(*** A pwd binary could not be found.)
952 # These programs are version sensitive.
954 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
955 [version \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ],
956 critic_missing="$critic_missing gcc")
957 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
958 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
959 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
961 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
962 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
963 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
964 MSGFMT=: aux_missing="$aux_missing msgfmt")
965 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
966 [GNU texinfo.* \([0-9][0-9.]*\)],
968 MAKEINFO=: aux_missing="$aux_missing makeinfo")
969 AC_CHECK_PROG_VER(SED, sed, --version,
970 [GNU sed version \([0-9]*\.[0-9.]*\)],
971 [3.0[2-9]*|3.[1-9]*|[4-9]*],
972 SED=: aux_missing="$aux_missing sed")
974 AC_CHECK_TOOL(READELF, readelf, false)
976 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
978 xno|x|x:) AUTOCONF=no ;;
981 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
982 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
983 libc_cv_autoconf_works=yes
985 libc_cv_autoconf_works=no
987 test $libc_cv_autoconf_works = yes || AUTOCONF=no
990 if test "x$AUTOCONF" = xno; then
991 aux_missing="$aux_missing autoconf"
994 test -n "$critic_missing" && AC_MSG_ERROR([
995 *** These critical programs are missing or too old:$critic_missing
996 *** Check the INSTALL file for required versions.])
998 test -n "$aux_missing" && AC_MSG_WARN([
999 *** These auxiliary programs are missing or incompatible versions:$aux_missing
1000 *** some features will be disabled.
1001 *** Check the INSTALL file for required versions.])
1003 # if using special system headers, find out the compiler's sekrit
1004 # header directory and add that to the list. NOTE: Only does the right
1005 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
1006 if test -n "$sysheaders"; then
1007 SYSINCLUDES=-nostdinc
1008 for d in include include-fixed; do
1009 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
1010 SYSINCLUDES="$SYSINCLUDES -isystem $i"
1012 SYSINCLUDES="$SYSINCLUDES \
1013 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
1014 if test -n "$CXX"; then
1016 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
1017 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
1018 for d in include "$cxxmachine/include"; do
1019 i=../../../../$d/c++/$cxxversion
1020 cxxheaders=`$CXX -print-file-name="$i"` &&
1021 test "x$cxxheaders" != x && test "x$i" != "x$cxxheaders" &&
1022 CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders \
1023 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
1027 AC_SUBST(SYSINCLUDES)
1028 AC_SUBST(CXX_SYSINCLUDES)
1030 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1031 # since this would lead to problems installing/building glibc.
1032 # LD_LIBRARY_PATH contains the current directory if one of the following
1034 # - one of the terminals (":" and ";") is the first or last sign
1035 # - two terminals occur directly after each other
1036 # - the path contains an element with a dot in it
1037 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1039 case ${LD_LIBRARY_PATH} in
1040 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1041 ld_library_path_setting="contains current directory"
1044 ld_library_path_setting="ok"
1048 AC_MSG_RESULT($ld_library_path_setting)
1049 if test "$ld_library_path_setting" != "ok"; then
1051 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1052 *** building glibc. Please change the environment variable
1053 *** and run configure again.])
1056 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1057 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
1058 libc_cv_gcc_static_libgcc=
1060 libc_cv_gcc_static_libgcc=-static-libgcc
1062 AC_SUBST(libc_cv_gcc_static_libgcc)
1064 AC_PATH_PROG(BASH_SHELL, bash, no)
1065 if test "$BASH_SHELL" != no &&
1066 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1067 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1068 libc_cv_have_bash2=yes
1070 libc_cv_have_bash2=no
1072 AC_SUBST(libc_cv_have_bash2)
1074 dnl We need a ksh compatible shell for tzselect.
1075 if test "$BASH_SHELL" = no; then
1076 AC_PATH_PROG(KSH, ksh, no)
1077 if test "$KSH" = no; then
1080 libc_cv_have_ksh=yes
1085 libc_cv_have_ksh=yes
1087 AC_SUBST(libc_cv_have_ksh)
1090 AC_PATH_PROG(PERL, perl, no)
1091 if test "$PERL" != no &&
1092 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1095 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1096 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1097 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1099 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1101 [#define __need_size_t
1102 #define __need_wchar_t
1105 #include <stddef.h>], [size_t size; wchar_t wchar;
1107 #error stddef.h ignored __need_*
1109 if (&size == NULL || &wchar == NULL) abort ();],
1110 libc_cv_friendly_stddef=yes,
1111 libc_cv_friendly_stddef=no)])
1112 if test $libc_cv_friendly_stddef = yes; then
1113 config_vars="$config_vars
1114 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1117 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1118 libc_cv_need_minus_P, [dnl
1119 cat > conftest.S <<EOF
1120 #include "confdefs.h"
1121 /* Nothing whatsoever. */
1123 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1124 libc_cv_need_minus_P=no
1126 libc_cv_need_minus_P=yes
1129 if test $libc_cv_need_minus_P = yes; then
1130 config_vars="$config_vars
1131 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1134 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1135 cat > conftest.s <<EOF
1138 .set glibc_conftest_frobozz,foo
1139 $libc_cv_asm_global_directive glibc_conftest_frobozz
1141 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1142 # (but it doesn't work), so we must do a linking check to be sure.
1143 cat > conftest1.c <<\EOF
1144 extern int glibc_conftest_frobozz;
1145 void _start() { glibc_conftest_frobozz = 1; }
1147 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1148 -nostartfiles -nostdlib \
1149 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1150 libc_cv_asm_set_directive=yes
1152 libc_cv_asm_set_directive=no
1155 if test $libc_cv_asm_set_directive = yes; then
1156 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1159 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1160 libc_cv_asm_unique_object, [dnl
1161 cat > conftest.s <<EOF
1164 .type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
1166 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1167 libc_cv_asm_unique_object=yes
1169 libc_cv_asm_unique_object=no
1172 if test $libc_cv_asm_unique_object = yes; then
1173 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1176 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1177 [cat > conftest.s <<EOF
1180 .symver _sym,sym@VERS
1182 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1183 libc_cv_asm_symver_directive=yes
1185 libc_cv_asm_symver_directive=no
1188 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1189 if test $libc_cv_asm_symver_directive = yes; then
1190 cat > conftest.s <<EOF
1193 .symver _sym,sym@VERS
1195 cat > conftest.map <<EOF
1204 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1205 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1206 -o conftest.so conftest.o
1207 -nostartfiles -nostdlib
1208 -Wl,--version-script,conftest.map
1209 1>&AS_MESSAGE_LOG_FD]);
1211 libc_cv_ld_version_script_option=yes
1213 libc_cv_ld_version_script_option=no
1216 libc_cv_ld_version_script_option=no
1219 libc_cv_ld_version_script_option=no
1222 if test $shared != no &&
1223 test $libc_cv_asm_symver_directive = yes &&
1224 test $libc_cv_ld_version_script_option = yes &&
1225 test $enable_versioning = yes; then
1227 AC_DEFINE(DO_VERSIONING)
1231 AC_SUBST(VERSIONING)
1233 if test $shared != no && test $VERSIONING = no; then
1235 *** WARNING: You should not compile GNU libc without versioning. Not using
1236 *** versioning will introduce incompatibilities so that old binaries
1237 *** will not run anymore.
1238 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1240 AC_CACHE_CHECK(for .previous assembler directive,
1241 libc_cv_asm_previous_directive, [dnl
1242 cat > conftest.s <<EOF
1243 .section foo_section
1246 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1247 libc_cv_asm_previous_directive=yes
1249 libc_cv_asm_previous_directive=no
1252 if test $libc_cv_asm_previous_directive = yes; then
1253 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1255 AC_CACHE_CHECK(for .popsection assembler directive,
1256 libc_cv_asm_popsection_directive, [dnl
1257 cat > conftest.s <<EOF
1258 .pushsection foo_section
1261 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1262 libc_cv_asm_popsection_directive=yes
1264 libc_cv_asm_popsection_directive=no
1267 if test $libc_cv_asm_popsection_directive = yes; then
1268 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1271 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1272 libc_cv_asm_protected_directive, [dnl
1273 cat > conftest.s <<EOF
1279 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1280 libc_cv_asm_protected_directive=yes
1282 AC_MSG_ERROR(assembler support for symbol visibility is required)
1286 if test $libc_cv_asm_protected_directive = yes; then
1287 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1288 libc_cv_visibility_attribute,
1289 [cat > conftest.c <<EOF
1290 int foo __attribute__ ((visibility ("hidden"))) = 1;
1291 int bar __attribute__ ((visibility ("protected"))) = 1;
1293 libc_cv_visibility_attribute=no
1294 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1295 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1296 if grep '\.protected.*bar' conftest.s >/dev/null; then
1297 libc_cv_visibility_attribute=yes
1301 rm -f conftest.{c,s}
1303 if test $libc_cv_visibility_attribute != yes; then
1304 AC_MSG_ERROR(compiler support for visibility attribute is required)
1308 if test $libc_cv_visibility_attribute = yes; then
1309 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1310 libc_cv_broken_visibility_attribute,
1311 [cat > conftest.c <<EOF
1313 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1314 int bar (int x) { return x; }
1316 libc_cv_broken_visibility_attribute=yes
1317 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1319 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1321 libc_cv_broken_visibility_attribute=no
1324 rm -f conftest.c conftest.s
1326 if test $libc_cv_broken_visibility_attribute = yes; then
1327 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1331 AC_CACHE_CHECK(for broken __attribute__((alias())),
1332 libc_cv_broken_alias_attribute,
1333 [cat > conftest.c <<EOF
1334 extern int foo (int x) __asm ("xyzzy");
1335 int bar (int x) { return x; }
1336 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1338 extern __typeof (dfoo) dfoo __asm ("abccb");
1341 libc_cv_broken_alias_attribute=yes
1342 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1343 if grep 'xyzzy' conftest.s >/dev/null &&
1344 grep 'abccb' conftest.s >/dev/null; then
1345 libc_cv_broken_alias_attribute=no
1348 rm -f conftest.c conftest.s
1350 if test $libc_cv_broken_alias_attribute = yes; then
1351 AC_MSG_ERROR(working alias attribute support required)
1354 if test $libc_cv_visibility_attribute = yes; then
1355 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1356 libc_cv_have_sdata_section,
1357 [echo "int i;" > conftest.c
1358 libc_cv_have_sdata_section=no
1359 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1360 | grep '\.sdata' >/dev/null; then
1361 libc_cv_have_sdata_section=yes
1363 rm -f conftest.c conftest.so
1365 if test $libc_cv_have_sdata_section = yes; then
1366 AC_DEFINE(HAVE_SDATA_SECTION)
1370 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1371 libc_cv_initfini_array, [dnl
1372 cat > conftest.c <<EOF
1373 int _start (void) { return 0; }
1374 int __start (void) { return 0; }
1375 int foo (void) { return 1; }
1376 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1378 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1379 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1381 if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1382 libc_cv_initfini_array=yes
1384 libc_cv_initfini_array=no
1387 libc_cv_initfini_array=no
1390 if test $libc_cv_initfini_array != yes; then
1391 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1394 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1395 libc_cv_ctors_header, [dnl
1396 libc_cv_ctors_header=yes
1398 __attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
1399 __attribute__ ((destructor)) void dtor (void) { puts("dtor"); }
1402 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1403 { gsub(/\@<:@ */, "@<:@") }
1404 $2 == ".ctors" || $2 == ".dtors" {
1405 size = strtonum("0x" $6)
1406 align = strtonum("0x" $NF)
1408 stub@<:@$2@:>@ = size == align * 2
1411 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1412 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1413 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1415 '], [libc_cv_ctors_header=no])
1417 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1420 if test $libc_cv_ctors_header = no; then
1421 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1424 AC_CACHE_CHECK(for libunwind-support in compiler,
1425 libc_cv_cc_with_libunwind, [
1426 cat > conftest.c <<EOF
1427 int main (void) { return 0; }
1429 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1430 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1431 libc_cv_cc_with_libunwind=yes
1433 libc_cv_cc_with_libunwind=no
1436 AC_SUBST(libc_cv_cc_with_libunwind)
1437 if test $libc_cv_cc_with_libunwind = yes; then
1438 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1441 AC_CACHE_CHECK(for -z nodelete option,
1442 libc_cv_z_nodelete, [dnl
1443 cat > conftest.c <<EOF
1444 int _start (void) { return 42; }
1446 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1447 -fPIC -shared -o conftest.so conftest.c
1448 -nostartfiles -nostdlib
1449 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1451 libc_cv_z_nodelete=yes
1453 AC_MSG_ERROR(linker with -z nodelete support required)
1457 AC_CACHE_CHECK(for -z nodlopen option,
1458 libc_cv_z_nodlopen, [dnl
1459 cat > conftest.c <<EOF
1460 int _start (void) { return 42; }
1462 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1463 -fPIC -shared -o conftest.so conftest.c
1464 -nostartfiles -nostdlib
1465 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1467 libc_cv_z_nodlopen=yes
1469 AC_MSG_ERROR(linker with -z nodlopen support required)
1473 AC_CACHE_CHECK(for -z initfirst option,
1474 libc_cv_z_initfirst, [dnl
1475 cat > conftest.c <<EOF
1476 int _start (void) { return 42; }
1478 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1479 -fPIC -shared -o conftest.so conftest.c
1480 -nostartfiles -nostdlib
1481 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1483 libc_cv_z_initfirst=yes
1485 AC_MSG_ERROR(linker with -z initfirst support required)
1489 # Add-on fragments can set these for other machines.
1490 libc_commonpagesize=${libc_commonpagesize:-no}
1491 libc_relro_required=${libc_relro_required:-no}
1492 case "$base_machine" in
1493 i[[34567]]86 | x86_64 | powerpc* | s390*)
1494 libc_commonpagesize=0x1000
1495 libc_relro_required=yes
1498 libc_commonpagesize=0x2000
1499 libc_relro_required=yes
1503 if test $libc_commonpagesize != no; then
1504 AC_CACHE_CHECK(for -z relro option,
1505 libc_cv_z_relro, [dnl
1507 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1508 int _start (void) { return 42; }
1509 extern void _exit (int);
1510 /* Since these pointers are const, they should go in rodata.
1511 Since they refer to functions that have to be resolved by
1512 dynamic linking, they should instead go in RELRO data. */
1513 const void *const relro[] = { &_start, &_exit, 0 };
1514 /* GNU ld fails to produce RELRO data when it's very small and there is no
1515 normal writable data following it, or if only uninitialized (.bss) data
1516 follows it, or only very small writable data. */
1517 int data[0x10000] = { 1, };
1519 cat > conftest.awk <<\EOF
1522 commonpagesize = strtonum(commonpagesize)
1524 { print "LINE:", $0 > "/dev/stderr" }
1526 vaddr = strtonum($3)
1527 memsz = strtonum($6)
1529 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1530 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1531 result = (end % commonpagesize == 0) ? "yes" : "broken"
1533 END { print result }
1535 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1536 -fPIC -shared -o conftest.so conftest.c
1537 -nostartfiles -nostdlib
1538 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1539 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1541 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1542 conftest.ph > conftest.cps
1544 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1546 if { test "x$libc_relro_required" = xyes &&
1547 test "x$libc_cv_z_relro" != xyes
1550 AC_MSG_ERROR(linker with -z relro support required)
1553 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1556 AC_CACHE_CHECK(for -Bgroup option,
1557 libc_cv_Bgroup, [dnl
1558 cat > conftest.c <<EOF
1559 int _start (void) { return 42; }
1561 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1562 -fPIC -shared -o conftest.so conftest.c
1563 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1570 AC_SUBST(libc_cv_Bgroup)
1572 AC_CACHE_CHECK(for libgcc_s suffix,
1573 libc_cv_libgcc_s_suffix, [dnl
1574 cat > conftest.c <<EOF
1575 int main (void) { return 0; }
1578 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1579 -fPIC -shared -shared-libgcc -o conftest.so \
1580 conftest.c -v 2>&1 >/dev/null \
1581 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1584 AC_SUBST(libc_cv_libgcc_s_suffix)
1586 AC_CACHE_CHECK(for --as-needed option,
1587 libc_cv_as_needed, [dnl
1588 cat > conftest.c <<EOF
1589 int main (void) { return 0; }
1591 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1592 -fPIC -shared -o conftest.so conftest.c
1593 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1594 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1596 libc_cv_as_needed=yes
1598 libc_cv_as_needed=no
1601 AC_SUBST(libc_cv_as_needed)
1604 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1605 libc_cv_as_noexecstack, [dnl
1606 cat > conftest.c <<EOF
1609 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1610 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1611 && grep -q .note.GNU-stack conftest.s \
1612 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1613 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1615 libc_cv_as_noexecstack=yes
1617 libc_cv_as_noexecstack=no
1620 if test $libc_cv_as_noexecstack = yes; then
1621 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1623 AC_SUBST(ASFLAGS_config)
1625 AC_CACHE_CHECK(for -z combreloc,
1626 libc_cv_z_combreloc, [dnl
1627 cat > conftest.c <<EOF
1628 extern int bar (int);
1630 int foo (void) { return bar (mumble); }
1632 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1633 -fPIC -shared -o conftest.so conftest.c
1634 -nostdlib -nostartfiles
1635 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1637 dnl The following test is a bit weak. We must use a tool which can test
1638 dnl cross-platform since the gcc used can be a cross compiler. Without
1639 dnl introducing new options this is not easily doable. Instead use a tool
1640 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1641 dnl look for a section named .rel.dyn.
1642 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1643 libc_cv_z_combreloc=yes
1645 libc_cv_z_combreloc=no
1648 libc_cv_z_combreloc=no
1651 if test "$libc_cv_z_combreloc" = yes; then
1652 AC_DEFINE(HAVE_Z_COMBRELOC)
1654 AC_SUBST(libc_cv_z_combreloc)
1656 AC_CACHE_CHECK(for -z execstack,
1657 libc_cv_z_execstack, [dnl
1658 cat > conftest.c <<EOF
1659 int _start (void) { return 42; }
1661 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1662 -fPIC -shared -o conftest.so conftest.c
1663 -Wl,-z,execstack -nostdlib
1664 1>&AS_MESSAGE_LOG_FD])
1666 libc_cv_z_execstack=yes
1668 libc_cv_z_execstack=no
1671 AC_SUBST(libc_cv_z_execstack)
1673 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1674 cat > conftest.c <<EOF
1676 main () { return 0;}
1678 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1679 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1687 AC_SUBST(libc_cv_fpie)
1689 AC_CACHE_CHECK(for --hash-style option,
1690 libc_cv_hashstyle, [dnl
1691 cat > conftest.c <<EOF
1692 int _start (void) { return 42; }
1694 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1695 -fPIC -shared -o conftest.so conftest.c
1696 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1698 libc_cv_hashstyle=yes
1700 libc_cv_hashstyle=no
1703 AC_SUBST(libc_cv_hashstyle)
1705 # The linker's default -shared behavior is good enough if it
1706 # does these things that our custom linker scripts ensure that
1707 # all allocated NOTE sections come first.
1708 if test "$use_default_link" = default; then
1709 AC_CACHE_CHECK([for sufficient default -shared layout],
1710 libc_cv_use_default_link, [dnl
1711 libc_cv_use_default_link=no
1712 cat > conftest.s <<\EOF
1713 .section .note.a,"a",%note
1718 .section .note.b,"a",%note
1724 if AC_TRY_COMMAND([dnl
1725 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1726 ac_try=`$READELF -S conftest.so | sed -n \
1728 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1734 libc_seen_a=no libc_seen_b=no
1736 while test $# -ge 2 -a "$1" = NOTE; do
1738 .note.a) libc_seen_a=yes ;;
1739 .note.b) libc_seen_b=yes ;;
1743 case "$libc_seen_a$libc_seen_b" in
1745 libc_cv_use_default_link=yes
1748 echo >&AS_MESSAGE_LOG_FD "\
1749 $libc_seen_a$libc_seen_b from:
1755 use_default_link=$libc_cv_use_default_link
1758 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1759 if libc_cv_output_format=`
1760 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1764 libc_cv_output_format=
1766 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1767 AC_SUBST(libc_cv_output_format)
1769 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1770 cat > conftest.c <<EOF
1773 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1774 conftest.c 1>&AS_MESSAGE_LOG_FD])
1776 libc_cv_fno_toplevel_reorder=yes
1778 libc_cv_fno_toplevel_reorder=no
1781 if test $libc_cv_fno_toplevel_reorder = yes; then
1782 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1784 fno_unit_at_a_time=-fno-unit-at-a-time
1786 AC_SUBST(fno_unit_at_a_time)
1788 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1789 cat > conftest.c <<EOF
1791 main () { return 0;}
1793 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
1794 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1801 AC_SUBST(libc_cv_ssp)
1803 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1804 cat > conftest.c <<EOF
1806 #ifdef __GNUC_GNU_INLINE__
1807 main () { return 0;}
1812 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1813 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1815 libc_cv_gnu89_inline=yes
1817 libc_cv_gnu89_inline=no
1820 if test $libc_cv_gnu89_inline = yes; then
1821 gnu89_inline=-fgnu89-inline
1825 AC_SUBST(gnu89_inline)
1827 AC_CACHE_CHECK(whether cc puts quotes around section names,
1828 libc_cv_have_section_quotes,
1829 [cat > conftest.c <<EOF
1830 static const int foo
1831 __attribute__ ((section ("bar"))) = 1;
1833 if ${CC-cc} -S conftest.c -o conftest.s; then
1834 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1835 libc_cv_have_section_quotes=yes
1837 libc_cv_have_section_quotes=no
1840 libc_cv_have_section_quotes=unknown
1842 rm -f conftest.{c,s}
1844 if test $libc_cv_have_section_quotes = yes; then
1845 AC_DEFINE(HAVE_SECTION_QUOTES)
1848 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1850 cat > conftest.s <<EOF
1852 ${libc_cv_asm_global_directive} foo
1855 .weak bar; bar = foo
1857 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1858 libc_cv_asm_weak_directive=yes
1860 libc_cv_asm_weak_directive=no
1864 if test $libc_cv_asm_weak_directive = no; then
1865 AC_CACHE_CHECK(for assembler .weakext directive,
1866 libc_cv_asm_weakext_directive,
1868 cat > conftest.s <<EOF
1870 ${libc_cv_asm_global_directive} foo
1874 ${libc_cv_asm_global_directive} baz
1877 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1878 libc_cv_asm_weakext_directive=yes
1880 libc_cv_asm_weakext_directive=no
1886 if test $libc_cv_asm_weak_directive = yes; then
1887 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1888 elif test $libc_cv_asm_weakext_directive = yes; then
1889 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1892 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1894 sparc/sparc64*) cfi_offset=2047;;
1897 cat > conftest.s <<EOF
1899 .type func,%function
1903 .cfi_rel_offset 1, $cfi_offset
1906 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1907 libc_cv_asm_cfi_directives=yes
1909 libc_cv_asm_cfi_directives=no
1912 if test $libc_cv_asm_cfi_directives = yes; then
1913 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1916 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1917 cat > conftest.c <<\EOF
1922 dnl No \ in command here because it ends up inside ''.
1923 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1924 -nostdlib -nostartfiles -Wl,--no-whole-archive
1925 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1926 libc_cv_ld_no_whole_archive=yes
1928 libc_cv_ld_no_whole_archive=no
1931 if test $libc_cv_ld_no_whole_archive = no; then
1932 AC_MSG_ERROR([support for --no-whole-archive is needed])
1935 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1936 cat > conftest.c <<\EOF
1941 dnl No \ in command here because it ends up inside ''.
1942 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1943 -nostdlib -nostartfiles -fexceptions
1944 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1945 libc_cv_gcc_exceptions=yes
1947 libc_cv_gcc_exceptions=no
1950 if test $libc_cv_gcc_exceptions = yes; then
1951 exceptions=-fexceptions
1953 AC_SUBST(exceptions)dnl
1955 if test "$host_cpu" = powerpc ; then
1956 # Check for a bug present in at least versions 2.8.x of GCC
1957 # and versions 1.0.x of EGCS.
1958 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1959 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1960 libc_cv_c_asmcr0_bug='no',
1961 libc_cv_c_asmcr0_bug='yes')])
1962 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1963 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1967 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1968 cat > conftest.c <<\EOF
1971 __builtin_memset (x, 0, 1000);
1975 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1977 libc_cv_gcc_builtin_memset=no
1979 libc_cv_gcc_builtin_memset=yes
1982 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1983 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1986 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1987 cat > conftest.c <<\EOF
1988 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1989 char *foo (const char *a, const char *b)
1991 return __builtin_strstr (a, b);
1995 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1997 libc_cv_gcc_builtin_redirection=yes
1999 libc_cv_gcc_builtin_redirection=no
2002 if test "$libc_cv_gcc_builtin_redirection" = no; then
2003 AC_MSG_ERROR([support for the symbol redirection needed])
2006 dnl Check whether the compiler supports the __thread keyword.
2007 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
2008 [cat > conftest.c <<\EOF
2009 __thread int a = 42;
2011 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
2012 libc_cv_gcc___thread=yes
2014 libc_cv_gcc___thread=no
2017 if test "$libc_cv_gcc___thread" = no; then
2018 AC_MSG_ERROR([support for the __thread keyword is required])
2021 dnl Check whether the compiler supports the tls_model attribute.
2022 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
2023 cat > conftest.c <<\EOF
2024 extern __thread int a __attribute__((tls_model ("initial-exec")));
2026 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
2027 libc_cv_gcc_tls_model_attr=yes
2029 libc_cv_gcc_tls_model_attr=no
2032 if test "$libc_cv_gcc_tls_model_attr" = no; then
2033 AC_MSG_ERROR([support for the tls_model attribute is required])
2036 if test -n "$submachine"; then
2037 AC_CACHE_CHECK([for compiler option for CPU variant],
2038 libc_cv_cc_submachine, [dnl
2039 libc_cv_cc_submachine=no
2040 for opt in "-march=$submachine" "-mcpu=$submachine"; do
2041 if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
2042 libc_cv_cc_submachine="$opt"
2046 if test "x$libc_cv_cc_submachine" = xno; then
2047 AC_MSG_ERROR([${CC-cc} does not support $submachine])
2050 AC_SUBST(libc_cv_cc_submachine)
2052 dnl Check whether we have the gd library available.
2053 AC_MSG_CHECKING(for libgd)
2054 if test "$with_gd" != "no"; then
2055 old_CFLAGS="$CFLAGS"
2056 CFLAGS="$CFLAGS $libgd_include"
2057 old_LDFLAGS="$LDFLAGS"
2058 LDFLAGS="$LDFLAGS $libgd_ldflags"
2060 LIBS="$LIBS -lgd -lpng -lz -lm"
2061 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
2062 CFLAGS="$old_CFLAGS"
2063 LDFLAGS="$old_LDFLAGS"
2068 AC_MSG_RESULT($LIBGD)
2072 if test x$with_selinux = xno ; then
2075 # See if we have the SELinux library
2076 AC_CHECK_LIB(selinux, is_selinux_enabled,
2077 have_selinux=yes, have_selinux=no)
2078 # See if we have the SELinux header with the NSCD permissions in it.
2079 if test x$have_selinux = xyes ; then
2080 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
2081 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
2082 [#ifdef NSCD__SHMEMHOST
2085 #error NSCD__SHMEMHOST not defined
2087 have_selinux=yes, have_selinux=no)
2088 AC_MSG_RESULT($have_selinux)
2091 if test x$with_selinux = xyes ; then
2092 if test x$have_selinux = xno ; then
2093 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
2097 # Check if we're building with SELinux support.
2098 if test "x$have_selinux" = xyes; then
2099 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2101 # See if we have the libaudit library
2102 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2103 have_libaudit=yes, have_libaudit=no)
2104 if test "x$have_libaudit" = xyes; then
2105 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2107 AC_SUBST(have_libaudit)
2109 # See if we have the libcap library
2110 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2111 if test "x$have_libcap" = xyes; then
2112 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2114 AC_SUBST(have_libcap)
2116 AC_SUBST(have_selinux)
2118 dnl check for the size of 'long double'.
2119 AC_CHECK_SIZEOF(long double, 0)
2120 sizeof_long_double=$ac_cv_sizeof_long_double
2121 AC_SUBST(sizeof_long_double)
2123 ### End of automated tests.
2124 ### Now run sysdeps configure fragments.
2126 # They also can set these variables.
2128 ldd_rewrite_script=no
2129 libc_cv_sysconfdir=$sysconfdir
2130 libc_cv_gcc_unwind_find_fde=no
2133 # Iterate over all the sysdep directories we will use, running their
2134 # configure fragments.
2135 for dir in $sysnames; do
2138 *) dest=$srcdir/$dir ;;
2140 if test -r $dest/configure; then
2141 AC_MSG_RESULT(running configure fragment for $dir)
2146 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2147 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2149 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2151 # Test for old glibc 2.0.x headers so that they can be removed properly
2152 # Search only in includedir.
2153 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2154 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2156 old_glibc_headers=yes
2158 old_glibc_headers=no
2160 AC_MSG_RESULT($old_glibc_headers)
2161 if test ${old_glibc_headers} = yes; then
2162 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2163 AC_MSG_WARN(*** be removed.)
2165 AC_SUBST(old_glibc_headers)
2167 AC_SUBST(libc_cv_slibdir)
2168 AC_SUBST(libc_cv_localedir)
2169 AC_SUBST(libc_cv_sysconfdir)
2170 AC_SUBST(libc_cv_rootsbindir)
2171 AC_SUBST(libc_cv_forced_unwind)
2173 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2174 AC_SUBST(libc_cv_cpp_asm_debuginfo)
2175 AC_SUBST(libc_cv_cc_sse4)
2176 AC_SUBST(libc_cv_cc_avx)
2177 AC_SUBST(libc_cv_cc_novzeroupper)
2178 AC_SUBST(libc_cv_cc_fma4)
2179 AC_SUBST(libc_cv_as_i686)
2181 AC_SUBST(use_ldconfig)
2182 AC_SUBST(ldd_rewrite_script)
2187 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2188 [libc_cv_pic_default=yes
2189 cat > conftest.c <<EOF
2190 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2191 # error PIC is default.
2194 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2195 libc_cv_pic_default=no
2198 AC_SUBST(libc_cv_pic_default)
2201 AC_SUBST(static_nss)
2202 AC_SUBST(nopic_initfini)
2206 dnl See sysdeps/mach/configure.in for this variable.
2207 AC_SUBST(mach_interface_list)
2209 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2212 config_makefile=Makefile
2215 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2216 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2220 AC_CONFIG_FILES([config.make ${config_makefile}])
2221 AC_CONFIG_COMMANDS([default],[[
2222 case $CONFIG_FILES in *config.make*)
2223 echo "$config_vars" >> config.make;;
2225 test -d bits || mkdir bits]],[[config_vars='$config_vars']])