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 # These programs are version sensitive.
944 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
945 [version \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ],
946 critic_missing="$critic_missing gcc")
947 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
948 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
949 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
951 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
952 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
953 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
954 MSGFMT=: aux_missing="$aux_missing msgfmt")
955 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
956 [GNU texinfo.* \([0-9][0-9.]*\)],
958 MAKEINFO=: aux_missing="$aux_missing makeinfo")
959 AC_CHECK_PROG_VER(SED, sed, --version,
960 [GNU sed version \([0-9]*\.[0-9.]*\)],
961 [3.0[2-9]*|3.[1-9]*|[4-9]*],
962 SED=: aux_missing="$aux_missing sed")
964 AC_CHECK_TOOL(READELF, readelf, false)
966 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
968 xno|x|x:) AUTOCONF=no ;;
971 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
972 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
973 libc_cv_autoconf_works=yes
975 libc_cv_autoconf_works=no
977 test $libc_cv_autoconf_works = yes || AUTOCONF=no
980 if test "x$AUTOCONF" = xno; then
981 aux_missing="$aux_missing autoconf"
984 test -n "$critic_missing" && AC_MSG_ERROR([
985 *** These critical programs are missing or too old:$critic_missing
986 *** Check the INSTALL file for required versions.])
988 test -n "$aux_missing" && AC_MSG_WARN([
989 *** These auxiliary programs are missing or incompatible versions:$aux_missing
990 *** some features will be disabled.
991 *** Check the INSTALL file for required versions.])
993 # if using special system headers, find out the compiler's sekrit
994 # header directory and add that to the list. NOTE: Only does the right
995 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
996 if test -n "$sysheaders"; then
997 SYSINCLUDES=-nostdinc
998 for d in include include-fixed; do
999 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
1000 SYSINCLUDES="$SYSINCLUDES -isystem $i"
1002 SYSINCLUDES="$SYSINCLUDES \
1003 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
1004 if test -n "$CXX"; then
1006 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
1007 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
1008 for d in include "$cxxmachine/include"; do
1009 i=../../../../$d/c++/$cxxversion
1010 cxxheaders=`$CXX -print-file-name="$i"` &&
1011 test "x$cxxheaders" != x && test "x$i" != "x$cxxheaders" &&
1012 CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders \
1013 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
1017 AC_SUBST(SYSINCLUDES)
1018 AC_SUBST(CXX_SYSINCLUDES)
1020 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1021 # since this would lead to problems installing/building glibc.
1022 # LD_LIBRARY_PATH contains the current directory if one of the following
1024 # - one of the terminals (":" and ";") is the first or last sign
1025 # - two terminals occur directly after each other
1026 # - the path contains an element with a dot in it
1027 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1029 case ${LD_LIBRARY_PATH} in
1030 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1031 ld_library_path_setting="contains current directory"
1034 ld_library_path_setting="ok"
1038 AC_MSG_RESULT($ld_library_path_setting)
1039 if test "$ld_library_path_setting" != "ok"; then
1041 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1042 *** building glibc. Please change the environment variable
1043 *** and run configure again.])
1046 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1047 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
1048 libc_cv_gcc_static_libgcc=
1050 libc_cv_gcc_static_libgcc=-static-libgcc
1052 AC_SUBST(libc_cv_gcc_static_libgcc)
1054 AC_PATH_PROG(BASH_SHELL, bash, no)
1055 if test "$BASH_SHELL" != no &&
1056 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1057 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1058 libc_cv_have_bash2=yes
1060 libc_cv_have_bash2=no
1062 AC_SUBST(libc_cv_have_bash2)
1064 dnl We need a ksh compatible shell for tzselect.
1065 if test "$BASH_SHELL" = no; then
1066 AC_PATH_PROG(KSH, ksh, no)
1067 if test "$KSH" = no; then
1070 libc_cv_have_ksh=yes
1075 libc_cv_have_ksh=yes
1077 AC_SUBST(libc_cv_have_ksh)
1080 AC_PATH_PROG(PERL, perl, no)
1081 if test "$PERL" != no &&
1082 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1085 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1086 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1087 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1089 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1091 [#define __need_size_t
1092 #define __need_wchar_t
1095 #include <stddef.h>], [size_t size; wchar_t wchar;
1097 #error stddef.h ignored __need_*
1099 if (&size == NULL || &wchar == NULL) abort ();],
1100 libc_cv_friendly_stddef=yes,
1101 libc_cv_friendly_stddef=no)])
1102 if test $libc_cv_friendly_stddef = yes; then
1103 config_vars="$config_vars
1104 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1107 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1108 libc_cv_need_minus_P, [dnl
1109 cat > conftest.S <<EOF
1110 #include "confdefs.h"
1111 /* Nothing whatsoever. */
1113 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1114 libc_cv_need_minus_P=no
1116 libc_cv_need_minus_P=yes
1119 if test $libc_cv_need_minus_P = yes; then
1120 config_vars="$config_vars
1121 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1124 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1125 cat > conftest.s <<EOF
1128 .set glibc_conftest_frobozz,foo
1129 $libc_cv_asm_global_directive glibc_conftest_frobozz
1131 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1132 # (but it doesn't work), so we must do a linking check to be sure.
1133 cat > conftest1.c <<\EOF
1134 extern int glibc_conftest_frobozz;
1135 void _start() { glibc_conftest_frobozz = 1; }
1137 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1138 -nostartfiles -nostdlib \
1139 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1140 libc_cv_asm_set_directive=yes
1142 libc_cv_asm_set_directive=no
1145 if test $libc_cv_asm_set_directive = yes; then
1146 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1149 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1150 libc_cv_asm_unique_object, [dnl
1151 cat > conftest.s <<EOF
1154 .type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
1156 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1157 libc_cv_asm_unique_object=yes
1159 libc_cv_asm_unique_object=no
1162 if test $libc_cv_asm_unique_object = yes; then
1163 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1166 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1167 [cat > conftest.s <<EOF
1170 .symver _sym,sym@VERS
1172 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1173 libc_cv_asm_symver_directive=yes
1175 libc_cv_asm_symver_directive=no
1178 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1179 if test $libc_cv_asm_symver_directive = yes; then
1180 cat > conftest.s <<EOF
1183 .symver _sym,sym@VERS
1185 cat > conftest.map <<EOF
1194 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1195 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1196 -o conftest.so conftest.o
1197 -nostartfiles -nostdlib
1198 -Wl,--version-script,conftest.map
1199 1>&AS_MESSAGE_LOG_FD]);
1201 libc_cv_ld_version_script_option=yes
1203 libc_cv_ld_version_script_option=no
1206 libc_cv_ld_version_script_option=no
1209 libc_cv_ld_version_script_option=no
1212 if test $shared != no &&
1213 test $libc_cv_asm_symver_directive = yes &&
1214 test $libc_cv_ld_version_script_option = yes &&
1215 test $enable_versioning = yes; then
1217 AC_DEFINE(DO_VERSIONING)
1221 AC_SUBST(VERSIONING)
1223 if test $shared != no && test $VERSIONING = no; then
1225 *** WARNING: You should not compile GNU libc without versioning. Not using
1226 *** versioning will introduce incompatibilities so that old binaries
1227 *** will not run anymore.
1228 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1230 AC_CACHE_CHECK(for .previous assembler directive,
1231 libc_cv_asm_previous_directive, [dnl
1232 cat > conftest.s <<EOF
1233 .section foo_section
1236 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1237 libc_cv_asm_previous_directive=yes
1239 libc_cv_asm_previous_directive=no
1242 if test $libc_cv_asm_previous_directive = yes; then
1243 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1245 AC_CACHE_CHECK(for .popsection assembler directive,
1246 libc_cv_asm_popsection_directive, [dnl
1247 cat > conftest.s <<EOF
1248 .pushsection foo_section
1251 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1252 libc_cv_asm_popsection_directive=yes
1254 libc_cv_asm_popsection_directive=no
1257 if test $libc_cv_asm_popsection_directive = yes; then
1258 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1261 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1262 libc_cv_asm_protected_directive, [dnl
1263 cat > conftest.s <<EOF
1269 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1270 libc_cv_asm_protected_directive=yes
1272 AC_MSG_ERROR(assembler support for symbol visibility is required)
1276 if test $libc_cv_asm_protected_directive = yes; then
1277 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1278 libc_cv_visibility_attribute,
1279 [cat > conftest.c <<EOF
1280 int foo __attribute__ ((visibility ("hidden"))) = 1;
1281 int bar __attribute__ ((visibility ("protected"))) = 1;
1283 libc_cv_visibility_attribute=no
1284 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1285 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1286 if grep '\.protected.*bar' conftest.s >/dev/null; then
1287 libc_cv_visibility_attribute=yes
1291 rm -f conftest.{c,s}
1293 if test $libc_cv_visibility_attribute != yes; then
1294 AC_MSG_ERROR(compiler support for visibility attribute is required)
1298 if test $libc_cv_visibility_attribute = yes; then
1299 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1300 libc_cv_broken_visibility_attribute,
1301 [cat > conftest.c <<EOF
1303 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1304 int bar (int x) { return x; }
1306 libc_cv_broken_visibility_attribute=yes
1307 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1309 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1311 libc_cv_broken_visibility_attribute=no
1314 rm -f conftest.c conftest.s
1316 if test $libc_cv_broken_visibility_attribute = yes; then
1317 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1321 AC_CACHE_CHECK(for broken __attribute__((alias())),
1322 libc_cv_broken_alias_attribute,
1323 [cat > conftest.c <<EOF
1324 extern int foo (int x) __asm ("xyzzy");
1325 int bar (int x) { return x; }
1326 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1328 extern __typeof (dfoo) dfoo __asm ("abccb");
1331 libc_cv_broken_alias_attribute=yes
1332 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1333 if grep 'xyzzy' conftest.s >/dev/null &&
1334 grep 'abccb' conftest.s >/dev/null; then
1335 libc_cv_broken_alias_attribute=no
1338 rm -f conftest.c conftest.s
1340 if test $libc_cv_broken_alias_attribute = yes; then
1341 AC_MSG_ERROR(working alias attribute support required)
1344 if test $libc_cv_visibility_attribute = yes; then
1345 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1346 libc_cv_have_sdata_section,
1347 [echo "int i;" > conftest.c
1348 libc_cv_have_sdata_section=no
1349 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1350 | grep '\.sdata' >/dev/null; then
1351 libc_cv_have_sdata_section=yes
1353 rm -f conftest.c conftest.so
1355 if test $libc_cv_have_sdata_section = yes; then
1356 AC_DEFINE(HAVE_SDATA_SECTION)
1360 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1361 libc_cv_initfini_array, [dnl
1362 cat > conftest.c <<EOF
1363 int _start (void) { return 0; }
1364 int __start (void) { return 0; }
1365 int foo (void) { return 1; }
1366 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1368 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1369 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1371 if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1372 libc_cv_initfini_array=yes
1374 libc_cv_initfini_array=no
1377 libc_cv_initfini_array=no
1380 if test $libc_cv_initfini_array != yes; then
1381 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1384 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1385 libc_cv_ctors_header, [dnl
1386 libc_cv_ctors_header=yes
1388 __attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
1389 __attribute__ ((destructor)) void dtor (void) { puts("dtor"); }
1392 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1393 { gsub(/\@<:@ */, "@<:@") }
1394 $2 == ".ctors" || $2 == ".dtors" {
1395 size = strtonum("0x" $6)
1396 align = strtonum("0x" $NF)
1398 stub@<:@$2@:>@ = size == align * 2
1401 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1402 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1403 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1405 '], [libc_cv_ctors_header=no])
1407 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1410 if test $libc_cv_ctors_header = no; then
1411 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1414 AC_CACHE_CHECK(for libunwind-support in compiler,
1415 libc_cv_cc_with_libunwind, [
1416 cat > conftest.c <<EOF
1417 int main (void) { return 0; }
1419 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1420 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1421 libc_cv_cc_with_libunwind=yes
1423 libc_cv_cc_with_libunwind=no
1426 AC_SUBST(libc_cv_cc_with_libunwind)
1427 if test $libc_cv_cc_with_libunwind = yes; then
1428 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1431 AC_CACHE_CHECK(for -z nodelete option,
1432 libc_cv_z_nodelete, [dnl
1433 cat > conftest.c <<EOF
1434 int _start (void) { return 42; }
1436 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1437 -fPIC -shared -o conftest.so conftest.c
1438 -nostartfiles -nostdlib
1439 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1441 libc_cv_z_nodelete=yes
1443 AC_MSG_ERROR(linker with -z nodelete support required)
1447 AC_CACHE_CHECK(for -z nodlopen option,
1448 libc_cv_z_nodlopen, [dnl
1449 cat > conftest.c <<EOF
1450 int _start (void) { return 42; }
1452 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1453 -fPIC -shared -o conftest.so conftest.c
1454 -nostartfiles -nostdlib
1455 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1457 libc_cv_z_nodlopen=yes
1459 AC_MSG_ERROR(linker with -z nodlopen support required)
1463 AC_CACHE_CHECK(for -z initfirst option,
1464 libc_cv_z_initfirst, [dnl
1465 cat > conftest.c <<EOF
1466 int _start (void) { return 42; }
1468 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1469 -fPIC -shared -o conftest.so conftest.c
1470 -nostartfiles -nostdlib
1471 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1473 libc_cv_z_initfirst=yes
1475 AC_MSG_ERROR(linker with -z initfirst support required)
1479 # Add-on fragments can set these for other machines.
1480 libc_commonpagesize=${libc_commonpagesize:-no}
1481 libc_relro_required=${libc_relro_required:-no}
1482 case "$base_machine" in
1483 i[[34567]]86 | x86_64 | powerpc* | s390*)
1484 libc_commonpagesize=0x1000
1485 libc_relro_required=yes
1488 libc_commonpagesize=0x2000
1489 libc_relro_required=yes
1493 if test $libc_commonpagesize != no; then
1494 AC_CACHE_CHECK(for -z relro option,
1495 libc_cv_z_relro, [dnl
1497 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1498 int _start (void) { return 42; }
1499 extern void _exit (int);
1500 /* Since these pointers are const, they should go in rodata.
1501 Since they refer to functions that have to be resolved by
1502 dynamic linking, they should instead go in RELRO data. */
1503 const void *const relro[] = { &_start, &_exit, 0 };
1504 /* GNU ld fails to produce RELRO data when it's very small and there is no
1505 normal writable data following it, or if only uninitialized (.bss) data
1506 follows it, or only very small writable data. */
1507 int data[0x10000] = { 1, };
1509 cat > conftest.awk <<\EOF
1512 commonpagesize = strtonum(commonpagesize)
1514 { print "LINE:", $0 > "/dev/stderr" }
1516 vaddr = strtonum($3)
1517 memsz = strtonum($6)
1519 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1520 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1521 result = (end % commonpagesize == 0) ? "yes" : "broken"
1523 END { print result }
1525 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1526 -fPIC -shared -o conftest.so conftest.c
1527 -nostartfiles -nostdlib
1528 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1529 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1531 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1532 conftest.ph > conftest.cps
1534 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1536 if { test "x$libc_relro_required" = xyes &&
1537 test "x$libc_cv_z_relro" != xyes
1540 AC_MSG_ERROR(linker with -z relro support required)
1543 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1546 AC_CACHE_CHECK(for -Bgroup option,
1547 libc_cv_Bgroup, [dnl
1548 cat > conftest.c <<EOF
1549 int _start (void) { return 42; }
1551 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1552 -fPIC -shared -o conftest.so conftest.c
1553 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1560 AC_SUBST(libc_cv_Bgroup)
1562 AC_CACHE_CHECK(for libgcc_s suffix,
1563 libc_cv_libgcc_s_suffix, [dnl
1564 cat > conftest.c <<EOF
1565 int main (void) { return 0; }
1568 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1569 -fPIC -shared -shared-libgcc -o conftest.so \
1570 conftest.c -v 2>&1 >/dev/null \
1571 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1574 AC_SUBST(libc_cv_libgcc_s_suffix)
1576 AC_CACHE_CHECK(for --as-needed option,
1577 libc_cv_as_needed, [dnl
1578 cat > conftest.c <<EOF
1579 int main (void) { return 0; }
1581 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1582 -fPIC -shared -o conftest.so conftest.c
1583 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1584 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1586 libc_cv_as_needed=yes
1588 libc_cv_as_needed=no
1591 AC_SUBST(libc_cv_as_needed)
1594 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1595 libc_cv_as_noexecstack, [dnl
1596 cat > conftest.c <<EOF
1599 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1600 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1601 && grep -q .note.GNU-stack conftest.s \
1602 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1603 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1605 libc_cv_as_noexecstack=yes
1607 libc_cv_as_noexecstack=no
1610 if test $libc_cv_as_noexecstack = yes; then
1611 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1613 AC_SUBST(ASFLAGS_config)
1615 AC_CACHE_CHECK(for -z combreloc,
1616 libc_cv_z_combreloc, [dnl
1617 cat > conftest.c <<EOF
1618 extern int bar (int);
1620 int foo (void) { return bar (mumble); }
1622 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1623 -fPIC -shared -o conftest.so conftest.c
1624 -nostdlib -nostartfiles
1625 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1627 dnl The following test is a bit weak. We must use a tool which can test
1628 dnl cross-platform since the gcc used can be a cross compiler. Without
1629 dnl introducing new options this is not easily doable. Instead use a tool
1630 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1631 dnl look for a section named .rel.dyn.
1632 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1633 libc_cv_z_combreloc=yes
1635 libc_cv_z_combreloc=no
1638 libc_cv_z_combreloc=no
1641 if test "$libc_cv_z_combreloc" = yes; then
1642 AC_DEFINE(HAVE_Z_COMBRELOC)
1644 AC_SUBST(libc_cv_z_combreloc)
1646 AC_CACHE_CHECK(for -z execstack,
1647 libc_cv_z_execstack, [dnl
1648 cat > conftest.c <<EOF
1649 int _start (void) { return 42; }
1651 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1652 -fPIC -shared -o conftest.so conftest.c
1653 -Wl,-z,execstack -nostdlib
1654 1>&AS_MESSAGE_LOG_FD])
1656 libc_cv_z_execstack=yes
1658 libc_cv_z_execstack=no
1661 AC_SUBST(libc_cv_z_execstack)
1663 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1664 cat > conftest.c <<EOF
1666 main () { return 0;}
1668 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1669 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1677 AC_SUBST(libc_cv_fpie)
1679 AC_CACHE_CHECK(for --hash-style option,
1680 libc_cv_hashstyle, [dnl
1681 cat > conftest.c <<EOF
1682 int _start (void) { return 42; }
1684 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1685 -fPIC -shared -o conftest.so conftest.c
1686 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1688 libc_cv_hashstyle=yes
1690 libc_cv_hashstyle=no
1693 AC_SUBST(libc_cv_hashstyle)
1695 # The linker's default -shared behavior is good enough if it
1696 # does these things that our custom linker scripts ensure that
1697 # all allocated NOTE sections come first.
1698 if test "$use_default_link" = default; then
1699 AC_CACHE_CHECK([for sufficient default -shared layout],
1700 libc_cv_use_default_link, [dnl
1701 libc_cv_use_default_link=no
1702 cat > conftest.s <<\EOF
1703 .section .note.a,"a",%note
1708 .section .note.b,"a",%note
1714 if AC_TRY_COMMAND([dnl
1715 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1716 ac_try=`$READELF -S conftest.so | sed -n \
1718 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1724 libc_seen_a=no libc_seen_b=no
1726 while test $# -ge 2 -a "$1" = NOTE; do
1728 .note.a) libc_seen_a=yes ;;
1729 .note.b) libc_seen_b=yes ;;
1733 case "$libc_seen_a$libc_seen_b" in
1735 libc_cv_use_default_link=yes
1738 echo >&AS_MESSAGE_LOG_FD "\
1739 $libc_seen_a$libc_seen_b from:
1745 use_default_link=$libc_cv_use_default_link
1748 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1749 if libc_cv_output_format=`
1750 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1754 libc_cv_output_format=
1756 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1757 AC_SUBST(libc_cv_output_format)
1759 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1760 cat > conftest.c <<EOF
1763 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1764 conftest.c 1>&AS_MESSAGE_LOG_FD])
1766 libc_cv_fno_toplevel_reorder=yes
1768 libc_cv_fno_toplevel_reorder=no
1771 if test $libc_cv_fno_toplevel_reorder = yes; then
1772 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1774 fno_unit_at_a_time=-fno-unit-at-a-time
1776 AC_SUBST(fno_unit_at_a_time)
1778 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1779 cat > conftest.c <<EOF
1781 main () { return 0;}
1783 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
1784 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1791 AC_SUBST(libc_cv_ssp)
1793 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1794 cat > conftest.c <<EOF
1796 #ifdef __GNUC_GNU_INLINE__
1797 main () { return 0;}
1802 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1803 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1805 libc_cv_gnu89_inline=yes
1807 libc_cv_gnu89_inline=no
1810 if test $libc_cv_gnu89_inline = yes; then
1811 gnu89_inline=-fgnu89-inline
1815 AC_SUBST(gnu89_inline)
1817 AC_CACHE_CHECK(whether cc puts quotes around section names,
1818 libc_cv_have_section_quotes,
1819 [cat > conftest.c <<EOF
1820 static const int foo
1821 __attribute__ ((section ("bar"))) = 1;
1823 if ${CC-cc} -S conftest.c -o conftest.s; then
1824 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1825 libc_cv_have_section_quotes=yes
1827 libc_cv_have_section_quotes=no
1830 libc_cv_have_section_quotes=unknown
1832 rm -f conftest.{c,s}
1834 if test $libc_cv_have_section_quotes = yes; then
1835 AC_DEFINE(HAVE_SECTION_QUOTES)
1838 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1840 cat > conftest.s <<EOF
1842 ${libc_cv_asm_global_directive} foo
1845 .weak bar; bar = foo
1847 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1848 libc_cv_asm_weak_directive=yes
1850 libc_cv_asm_weak_directive=no
1854 if test $libc_cv_asm_weak_directive = no; then
1855 AC_CACHE_CHECK(for assembler .weakext directive,
1856 libc_cv_asm_weakext_directive,
1858 cat > conftest.s <<EOF
1860 ${libc_cv_asm_global_directive} foo
1864 ${libc_cv_asm_global_directive} baz
1867 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1868 libc_cv_asm_weakext_directive=yes
1870 libc_cv_asm_weakext_directive=no
1876 if test $libc_cv_asm_weak_directive = yes; then
1877 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1878 elif test $libc_cv_asm_weakext_directive = yes; then
1879 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1882 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1884 sparc/sparc64*) cfi_offset=2047;;
1887 cat > conftest.s <<EOF
1889 .type func,%function
1893 .cfi_rel_offset 1, $cfi_offset
1896 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1897 libc_cv_asm_cfi_directives=yes
1899 libc_cv_asm_cfi_directives=no
1902 if test $libc_cv_asm_cfi_directives = yes; then
1903 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1906 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1907 cat > conftest.c <<\EOF
1912 dnl No \ in command here because it ends up inside ''.
1913 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1914 -nostdlib -nostartfiles -Wl,--no-whole-archive
1915 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1916 libc_cv_ld_no_whole_archive=yes
1918 libc_cv_ld_no_whole_archive=no
1921 if test $libc_cv_ld_no_whole_archive = no; then
1922 AC_MSG_ERROR([support for --no-whole-archive is needed])
1925 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1926 cat > conftest.c <<\EOF
1931 dnl No \ in command here because it ends up inside ''.
1932 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1933 -nostdlib -nostartfiles -fexceptions
1934 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1935 libc_cv_gcc_exceptions=yes
1937 libc_cv_gcc_exceptions=no
1940 if test $libc_cv_gcc_exceptions = yes; then
1941 exceptions=-fexceptions
1943 AC_SUBST(exceptions)dnl
1945 if test "$host_cpu" = powerpc ; then
1946 # Check for a bug present in at least versions 2.8.x of GCC
1947 # and versions 1.0.x of EGCS.
1948 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1949 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1950 libc_cv_c_asmcr0_bug='no',
1951 libc_cv_c_asmcr0_bug='yes')])
1952 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1953 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1957 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1958 cat > conftest.c <<\EOF
1961 __builtin_memset (x, 0, 1000);
1965 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1967 libc_cv_gcc_builtin_memset=no
1969 libc_cv_gcc_builtin_memset=yes
1972 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1973 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1976 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1977 cat > conftest.c <<\EOF
1978 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1979 char *foo (const char *a, const char *b)
1981 return __builtin_strstr (a, b);
1985 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1987 libc_cv_gcc_builtin_redirection=yes
1989 libc_cv_gcc_builtin_redirection=no
1992 if test "$libc_cv_gcc_builtin_redirection" = no; then
1993 AC_MSG_ERROR([support for the symbol redirection needed])
1996 dnl Check whether the compiler supports the __thread keyword.
1997 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1998 [cat > conftest.c <<\EOF
1999 __thread int a = 42;
2001 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
2002 libc_cv_gcc___thread=yes
2004 libc_cv_gcc___thread=no
2007 if test "$libc_cv_gcc___thread" = no; then
2008 AC_MSG_ERROR([support for the __thread keyword is required])
2011 dnl Check whether the compiler supports the tls_model attribute.
2012 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
2013 cat > conftest.c <<\EOF
2014 extern __thread int a __attribute__((tls_model ("initial-exec")));
2016 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
2017 libc_cv_gcc_tls_model_attr=yes
2019 libc_cv_gcc_tls_model_attr=no
2022 if test "$libc_cv_gcc_tls_model_attr" = no; then
2023 AC_MSG_ERROR([support for the tls_model attribute is required])
2026 if test -n "$submachine"; then
2027 AC_CACHE_CHECK([for compiler option for CPU variant],
2028 libc_cv_cc_submachine, [dnl
2029 libc_cv_cc_submachine=no
2030 for opt in "-march=$submachine" "-mcpu=$submachine"; do
2031 if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
2032 libc_cv_cc_submachine="$opt"
2036 if test "x$libc_cv_cc_submachine" = xno; then
2037 AC_MSG_ERROR([${CC-cc} does not support $submachine])
2040 AC_SUBST(libc_cv_cc_submachine)
2042 dnl Check whether we have the gd library available.
2043 AC_MSG_CHECKING(for libgd)
2044 if test "$with_gd" != "no"; then
2045 old_CFLAGS="$CFLAGS"
2046 CFLAGS="$CFLAGS $libgd_include"
2047 old_LDFLAGS="$LDFLAGS"
2048 LDFLAGS="$LDFLAGS $libgd_ldflags"
2050 LIBS="$LIBS -lgd -lpng -lz -lm"
2051 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
2052 CFLAGS="$old_CFLAGS"
2053 LDFLAGS="$old_LDFLAGS"
2058 AC_MSG_RESULT($LIBGD)
2062 if test x$with_selinux = xno ; then
2065 # See if we have the SELinux library
2066 AC_CHECK_LIB(selinux, is_selinux_enabled,
2067 have_selinux=yes, have_selinux=no)
2068 # See if we have the SELinux header with the NSCD permissions in it.
2069 if test x$have_selinux = xyes ; then
2070 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
2071 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
2072 [#ifdef NSCD__SHMEMHOST
2075 #error NSCD__SHMEMHOST not defined
2077 have_selinux=yes, have_selinux=no)
2078 AC_MSG_RESULT($have_selinux)
2081 if test x$with_selinux = xyes ; then
2082 if test x$have_selinux = xno ; then
2083 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
2087 # Check if we're building with SELinux support.
2088 if test "x$have_selinux" = xyes; then
2089 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2091 # See if we have the libaudit library
2092 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2093 have_libaudit=yes, have_libaudit=no)
2094 if test "x$have_libaudit" = xyes; then
2095 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2097 AC_SUBST(have_libaudit)
2099 # See if we have the libcap library
2100 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2101 if test "x$have_libcap" = xyes; then
2102 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2104 AC_SUBST(have_libcap)
2106 AC_SUBST(have_selinux)
2108 dnl check for the size of 'long double'.
2109 AC_CHECK_SIZEOF(long double, 0)
2110 sizeof_long_double=$ac_cv_sizeof_long_double
2111 AC_SUBST(sizeof_long_double)
2113 ### End of automated tests.
2114 ### Now run sysdeps configure fragments.
2116 # They also can set these variables.
2118 ldd_rewrite_script=no
2119 libc_cv_sysconfdir=$sysconfdir
2120 libc_cv_gcc_unwind_find_fde=no
2123 # Iterate over all the sysdep directories we will use, running their
2124 # configure fragments.
2125 for dir in $sysnames; do
2128 *) dest=$srcdir/$dir ;;
2130 if test -r $dest/configure; then
2131 AC_MSG_RESULT(running configure fragment for $dir)
2136 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2137 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2139 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2141 # Test for old glibc 2.0.x headers so that they can be removed properly
2142 # Search only in includedir.
2143 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2144 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2146 old_glibc_headers=yes
2148 old_glibc_headers=no
2150 AC_MSG_RESULT($old_glibc_headers)
2151 if test ${old_glibc_headers} = yes; then
2152 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2153 AC_MSG_WARN(*** be removed.)
2155 AC_SUBST(old_glibc_headers)
2157 AC_SUBST(libc_cv_slibdir)
2158 AC_SUBST(libc_cv_localedir)
2159 AC_SUBST(libc_cv_sysconfdir)
2160 AC_SUBST(libc_cv_rootsbindir)
2161 AC_SUBST(libc_cv_forced_unwind)
2163 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2164 AC_SUBST(libc_cv_cpp_asm_debuginfo)
2165 AC_SUBST(libc_cv_cc_sse4)
2166 AC_SUBST(libc_cv_cc_avx)
2167 AC_SUBST(libc_cv_cc_novzeroupper)
2168 AC_SUBST(libc_cv_cc_fma4)
2169 AC_SUBST(libc_cv_as_i686)
2171 AC_SUBST(use_ldconfig)
2172 AC_SUBST(ldd_rewrite_script)
2177 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2178 [libc_cv_pic_default=yes
2179 cat > conftest.c <<EOF
2180 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2181 # error PIC is default.
2184 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2185 libc_cv_pic_default=no
2188 AC_SUBST(libc_cv_pic_default)
2191 AC_SUBST(static_nss)
2192 AC_SUBST(nopic_initfini)
2196 dnl See sysdeps/mach/configure.in for this variable.
2197 AC_SUBST(mach_interface_list)
2199 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2202 config_makefile=Makefile
2205 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2206 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2210 AC_CONFIG_FILES([config.make ${config_makefile}])
2211 AC_CONFIG_COMMANDS([default],[[
2212 case $CONFIG_FILES in *config.make*)
2213 echo "$config_vars" >> config.make;;
2215 test -d bits || mkdir bits]],[[config_vars='$config_vars']])