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 # ranlib is never necessary on Linux and Hurd systems
1033 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1034 # since this would lead to problems installing/building glibc.
1035 # LD_LIBRARY_PATH contains the current directory if one of the following
1037 # - one of the terminals (":" and ";") is the first or last sign
1038 # - two terminals occur directly after each other
1039 # - the path contains an element with a dot in it
1040 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1042 case ${LD_LIBRARY_PATH} in
1043 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1044 ld_library_path_setting="contains current directory"
1047 ld_library_path_setting="ok"
1051 AC_MSG_RESULT($ld_library_path_setting)
1052 if test "$ld_library_path_setting" != "ok"; then
1054 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1055 *** building glibc. Please change the environment variable
1056 *** and run configure again.])
1059 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1060 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
1061 libc_cv_gcc_static_libgcc=
1063 libc_cv_gcc_static_libgcc=-static-libgcc
1065 AC_SUBST(libc_cv_gcc_static_libgcc)
1067 AC_PATH_PROG(BASH_SHELL, bash, no)
1068 if test "$BASH_SHELL" != no &&
1069 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1070 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1071 libc_cv_have_bash2=yes
1073 libc_cv_have_bash2=no
1075 AC_SUBST(libc_cv_have_bash2)
1077 dnl We need a ksh compatible shell for tzselect.
1078 if test "$BASH_SHELL" = no; then
1079 AC_PATH_PROG(KSH, ksh, no)
1080 if test "$KSH" = no; then
1083 libc_cv_have_ksh=yes
1088 libc_cv_have_ksh=yes
1090 AC_SUBST(libc_cv_have_ksh)
1093 AC_PATH_PROG(PERL, perl, no)
1094 if test "$PERL" != no &&
1095 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1098 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1099 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1100 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1102 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
1103 echo '#include <stddef.h>
1104 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
1105 if eval "$ac_cpp conftest.c 2>/dev/null" \
1106 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
1107 libc_cv_signed_size_t=no
1109 libc_cv_signed_size_t=yes
1112 if test $libc_cv_signed_size_t = yes; then
1113 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
1114 cat >> confdefs.h <<\EOF
1115 #undef __SIZE_TYPE__
1116 #define __SIZE_TYPE__ unsigned
1120 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1122 [#define __need_size_t
1123 #define __need_wchar_t
1126 #include <stddef.h>], [size_t size; wchar_t wchar;
1128 #error stddef.h ignored __need_*
1130 if (&size == NULL || &wchar == NULL) abort ();],
1131 libc_cv_friendly_stddef=yes,
1132 libc_cv_friendly_stddef=no)])
1133 if test $libc_cv_friendly_stddef = yes; then
1134 config_vars="$config_vars
1135 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1138 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1139 libc_cv_need_minus_P, [dnl
1140 cat > conftest.S <<EOF
1141 #include "confdefs.h"
1142 /* Nothing whatsoever. */
1144 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1145 libc_cv_need_minus_P=no
1147 libc_cv_need_minus_P=yes
1150 if test $libc_cv_need_minus_P = yes; then
1151 config_vars="$config_vars
1152 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1155 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1156 cat > conftest.s <<EOF
1159 .set glibc_conftest_frobozz,foo
1160 $libc_cv_asm_global_directive glibc_conftest_frobozz
1162 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1163 # (but it doesn't work), so we must do a linking check to be sure.
1164 cat > conftest1.c <<\EOF
1165 extern int glibc_conftest_frobozz;
1166 void _start() { glibc_conftest_frobozz = 1; }
1168 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1169 -nostartfiles -nostdlib \
1170 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1171 libc_cv_asm_set_directive=yes
1173 libc_cv_asm_set_directive=no
1176 if test $libc_cv_asm_set_directive = yes; then
1177 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1180 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1181 libc_cv_asm_unique_object, [dnl
1182 cat > conftest.s <<EOF
1185 .type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
1187 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1188 libc_cv_asm_unique_object=yes
1190 libc_cv_asm_unique_object=no
1193 if test $libc_cv_asm_unique_object = yes; then
1194 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1197 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1198 [cat > conftest.s <<EOF
1201 .symver _sym,sym@VERS
1203 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1204 libc_cv_asm_symver_directive=yes
1206 libc_cv_asm_symver_directive=no
1209 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1210 if test $libc_cv_asm_symver_directive = yes; then
1211 cat > conftest.s <<EOF
1214 .symver _sym,sym@VERS
1216 cat > conftest.map <<EOF
1225 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1226 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1227 -o conftest.so conftest.o
1228 -nostartfiles -nostdlib
1229 -Wl,--version-script,conftest.map
1230 1>&AS_MESSAGE_LOG_FD]);
1232 libc_cv_ld_version_script_option=yes
1234 libc_cv_ld_version_script_option=no
1237 libc_cv_ld_version_script_option=no
1240 libc_cv_ld_version_script_option=no
1243 if test $shared != no &&
1244 test $libc_cv_asm_symver_directive = yes &&
1245 test $libc_cv_ld_version_script_option = yes &&
1246 test $enable_versioning = yes; then
1248 AC_DEFINE(DO_VERSIONING)
1252 AC_SUBST(VERSIONING)
1254 if test $shared != no && test $VERSIONING = no; then
1256 *** WARNING: You should not compile GNU libc without versioning. Not using
1257 *** versioning will introduce incompatibilities so that old binaries
1258 *** will not run anymore.
1259 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1261 AC_CACHE_CHECK(for .previous assembler directive,
1262 libc_cv_asm_previous_directive, [dnl
1263 cat > conftest.s <<EOF
1264 .section foo_section
1267 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1268 libc_cv_asm_previous_directive=yes
1270 libc_cv_asm_previous_directive=no
1273 if test $libc_cv_asm_previous_directive = yes; then
1274 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1276 AC_CACHE_CHECK(for .popsection assembler directive,
1277 libc_cv_asm_popsection_directive, [dnl
1278 cat > conftest.s <<EOF
1279 .pushsection foo_section
1282 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1283 libc_cv_asm_popsection_directive=yes
1285 libc_cv_asm_popsection_directive=no
1288 if test $libc_cv_asm_popsection_directive = yes; then
1289 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1292 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1293 libc_cv_asm_protected_directive, [dnl
1294 cat > conftest.s <<EOF
1300 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1301 libc_cv_asm_protected_directive=yes
1303 AC_MSG_ERROR(assembler support for symbol visibility is required)
1307 if test $libc_cv_asm_protected_directive = yes; then
1308 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1309 libc_cv_visibility_attribute,
1310 [cat > conftest.c <<EOF
1311 int foo __attribute__ ((visibility ("hidden"))) = 1;
1312 int bar __attribute__ ((visibility ("protected"))) = 1;
1314 libc_cv_visibility_attribute=no
1315 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1316 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1317 if grep '\.protected.*bar' conftest.s >/dev/null; then
1318 libc_cv_visibility_attribute=yes
1322 rm -f conftest.{c,s}
1324 if test $libc_cv_visibility_attribute != yes; then
1325 AC_MSG_ERROR(compiler support for visibility attribute is required)
1329 if test $libc_cv_visibility_attribute = yes; then
1330 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1331 libc_cv_broken_visibility_attribute,
1332 [cat > conftest.c <<EOF
1334 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1335 int bar (int x) { return x; }
1337 libc_cv_broken_visibility_attribute=yes
1338 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1340 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1342 libc_cv_broken_visibility_attribute=no
1345 rm -f conftest.c conftest.s
1347 if test $libc_cv_broken_visibility_attribute = yes; then
1348 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1352 AC_CACHE_CHECK(for broken __attribute__((alias())),
1353 libc_cv_broken_alias_attribute,
1354 [cat > conftest.c <<EOF
1355 extern int foo (int x) __asm ("xyzzy");
1356 int bar (int x) { return x; }
1357 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1359 extern __typeof (dfoo) dfoo __asm ("abccb");
1362 libc_cv_broken_alias_attribute=yes
1363 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1364 if grep 'xyzzy' conftest.s >/dev/null &&
1365 grep 'abccb' conftest.s >/dev/null; then
1366 libc_cv_broken_alias_attribute=no
1369 rm -f conftest.c conftest.s
1371 if test $libc_cv_broken_alias_attribute = yes; then
1372 AC_MSG_ERROR(working alias attribute support required)
1375 if test $libc_cv_visibility_attribute = yes; then
1376 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1377 libc_cv_have_sdata_section,
1378 [echo "int i;" > conftest.c
1379 libc_cv_have_sdata_section=no
1380 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1381 | grep '\.sdata' >/dev/null; then
1382 libc_cv_have_sdata_section=yes
1384 rm -f conftest.c conftest.so
1386 if test $libc_cv_have_sdata_section = yes; then
1387 AC_DEFINE(HAVE_SDATA_SECTION)
1391 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1392 libc_cv_initfini_array, [dnl
1393 cat > conftest.c <<EOF
1394 int _start (void) { return 0; }
1395 int __start (void) { return 0; }
1396 int foo (void) { return 1; }
1397 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1399 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1400 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1402 if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1403 libc_cv_initfini_array=yes
1405 libc_cv_initfini_array=no
1408 libc_cv_initfini_array=no
1411 if test $libc_cv_initfini_array != yes; then
1412 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1415 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1416 libc_cv_ctors_header, [dnl
1417 libc_cv_ctors_header=yes
1419 __attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
1420 __attribute__ ((destructor)) void dtor (void) { puts("dtor"); }
1423 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1424 { gsub(/\@<:@ */, "@<:@") }
1425 $2 == ".ctors" || $2 == ".dtors" {
1426 size = strtonum("0x" $6)
1427 align = strtonum("0x" $NF)
1429 stub@<:@$2@:>@ = size == align * 2
1432 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1433 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1434 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1436 '], [libc_cv_ctors_header=no])
1438 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1441 if test $libc_cv_ctors_header = no; then
1442 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1445 AC_CACHE_CHECK(for libunwind-support in compiler,
1446 libc_cv_cc_with_libunwind, [
1447 cat > conftest.c <<EOF
1448 int main (void) { return 0; }
1450 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1451 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1452 libc_cv_cc_with_libunwind=yes
1454 libc_cv_cc_with_libunwind=no
1457 AC_SUBST(libc_cv_cc_with_libunwind)
1458 if test $libc_cv_cc_with_libunwind = yes; then
1459 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1462 AC_CACHE_CHECK(for -z nodelete option,
1463 libc_cv_z_nodelete, [dnl
1464 cat > conftest.c <<EOF
1465 int _start (void) { return 42; }
1467 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1468 -fPIC -shared -o conftest.so conftest.c
1469 -nostartfiles -nostdlib
1470 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1472 libc_cv_z_nodelete=yes
1474 AC_MSG_ERROR(linker with -z nodelete support required)
1478 AC_CACHE_CHECK(for -z nodlopen option,
1479 libc_cv_z_nodlopen, [dnl
1480 cat > conftest.c <<EOF
1481 int _start (void) { return 42; }
1483 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1484 -fPIC -shared -o conftest.so conftest.c
1485 -nostartfiles -nostdlib
1486 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1488 libc_cv_z_nodlopen=yes
1490 AC_MSG_ERROR(linker with -z nodlopen support required)
1494 AC_CACHE_CHECK(for -z initfirst option,
1495 libc_cv_z_initfirst, [dnl
1496 cat > conftest.c <<EOF
1497 int _start (void) { return 42; }
1499 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1500 -fPIC -shared -o conftest.so conftest.c
1501 -nostartfiles -nostdlib
1502 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1504 libc_cv_z_initfirst=yes
1506 AC_MSG_ERROR(linker with -z initfirst support required)
1510 # Add-on fragments can set these for other machines.
1511 libc_commonpagesize=${libc_commonpagesize:-no}
1512 libc_relro_required=${libc_relro_required:-no}
1513 case "$base_machine" in
1514 i[[34567]]86 | x86_64 | powerpc* | s390*)
1515 libc_commonpagesize=0x1000
1516 libc_relro_required=yes
1519 libc_commonpagesize=0x2000
1520 libc_relro_required=yes
1523 libc_commonpagesize=0x4000
1526 libc_commonpagesize=0x10000
1527 libc_relro_required=yes
1531 if test $libc_commonpagesize != no; then
1532 AC_CACHE_CHECK(for -z relro option,
1533 libc_cv_z_relro, [dnl
1535 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1536 int _start (void) { return 42; }
1537 extern void _exit (int);
1538 /* Since these pointers are const, they should go in rodata.
1539 Since they refer to functions that have to be resolved by
1540 dynamic linking, they should instead go in RELRO data. */
1541 const void *const relro[] = { &_start, &_exit, 0 };
1542 /* GNU ld fails to produce RELRO data when it's very small and there is no
1543 normal writable data following it, or if only uninitialized (.bss) data
1544 follows it, or only very small writable data. */
1545 int data[0x10000] = { 1, };
1547 cat > conftest.awk <<\EOF
1550 commonpagesize = strtonum(commonpagesize)
1552 { print "LINE:", $0 > "/dev/stderr" }
1554 vaddr = strtonum($3)
1555 memsz = strtonum($6)
1557 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1558 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1559 result = (end % commonpagesize == 0) ? "yes" : "broken"
1561 END { print result }
1563 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1564 -fPIC -shared -o conftest.so conftest.c
1565 -nostartfiles -nostdlib
1566 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1567 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1569 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1570 conftest.ph > conftest.cps
1572 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1574 if { test "x$libc_relro_required" = xyes &&
1575 test "x$libc_cv_z_relro" != xyes
1578 AC_MSG_ERROR(linker with -z relro support required)
1581 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1584 AC_CACHE_CHECK(for -Bgroup option,
1585 libc_cv_Bgroup, [dnl
1586 cat > conftest.c <<EOF
1587 int _start (void) { return 42; }
1589 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1590 -fPIC -shared -o conftest.so conftest.c
1591 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1598 AC_SUBST(libc_cv_Bgroup)
1600 AC_CACHE_CHECK(for libgcc_s suffix,
1601 libc_cv_libgcc_s_suffix, [dnl
1602 cat > conftest.c <<EOF
1603 int main (void) { return 0; }
1606 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1607 -fPIC -shared -shared-libgcc -o conftest.so \
1608 conftest.c -v 2>&1 >/dev/null \
1609 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1612 AC_SUBST(libc_cv_libgcc_s_suffix)
1614 AC_CACHE_CHECK(for --as-needed option,
1615 libc_cv_as_needed, [dnl
1616 cat > conftest.c <<EOF
1617 int main (void) { return 0; }
1619 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1620 -fPIC -shared -o conftest.so conftest.c
1621 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1622 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1624 libc_cv_as_needed=yes
1626 libc_cv_as_needed=no
1629 AC_SUBST(libc_cv_as_needed)
1632 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1633 libc_cv_as_noexecstack, [dnl
1634 cat > conftest.c <<EOF
1637 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1638 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1639 && grep -q .note.GNU-stack conftest.s \
1640 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1641 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1643 libc_cv_as_noexecstack=yes
1645 libc_cv_as_noexecstack=no
1648 if test $libc_cv_as_noexecstack = yes; then
1649 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1651 AC_SUBST(ASFLAGS_config)
1653 AC_CACHE_CHECK(for -z combreloc,
1654 libc_cv_z_combreloc, [dnl
1655 cat > conftest.c <<EOF
1656 extern int bar (int);
1658 int foo (void) { return bar (mumble); }
1660 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1661 -fPIC -shared -o conftest.so conftest.c
1662 -nostdlib -nostartfiles
1663 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1665 dnl The following test is a bit weak. We must use a tool which can test
1666 dnl cross-platform since the gcc used can be a cross compiler. Without
1667 dnl introducing new options this is not easily doable. Instead use a tool
1668 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1669 dnl look for a section named .rel.dyn.
1670 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1671 libc_cv_z_combreloc=yes
1673 libc_cv_z_combreloc=no
1676 libc_cv_z_combreloc=no
1679 if test "$libc_cv_z_combreloc" = yes; then
1680 AC_DEFINE(HAVE_Z_COMBRELOC)
1682 AC_SUBST(libc_cv_z_combreloc)
1684 AC_CACHE_CHECK(for -z execstack,
1685 libc_cv_z_execstack, [dnl
1686 cat > conftest.c <<EOF
1687 int _start (void) { return 42; }
1689 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1690 -fPIC -shared -o conftest.so conftest.c
1691 -Wl,-z,execstack -nostdlib
1692 1>&AS_MESSAGE_LOG_FD])
1694 libc_cv_z_execstack=yes
1696 libc_cv_z_execstack=no
1699 AC_SUBST(libc_cv_z_execstack)
1701 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1702 cat > conftest.c <<EOF
1704 main () { return 0;}
1706 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1707 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1715 AC_SUBST(libc_cv_fpie)
1717 AC_CACHE_CHECK(for --hash-style option,
1718 libc_cv_hashstyle, [dnl
1719 cat > conftest.c <<EOF
1720 int _start (void) { return 42; }
1722 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1723 -fPIC -shared -o conftest.so conftest.c
1724 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1726 libc_cv_hashstyle=yes
1728 libc_cv_hashstyle=no
1731 AC_SUBST(libc_cv_hashstyle)
1733 # The linker's default -shared behavior is good enough if it
1734 # does these things that our custom linker scripts ensure that
1735 # all allocated NOTE sections come first.
1736 if test "$use_default_link" = default; then
1737 AC_CACHE_CHECK([for sufficient default -shared layout],
1738 libc_cv_use_default_link, [dnl
1739 libc_cv_use_default_link=no
1740 cat > conftest.s <<\EOF
1741 .section .note.a,"a",%note
1746 .section .note.b,"a",%note
1752 if AC_TRY_COMMAND([dnl
1753 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1754 ac_try=`$READELF -S conftest.so | sed -n \
1756 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1762 libc_seen_a=no libc_seen_b=no
1764 while test $# -ge 2 -a "$1" = NOTE; do
1766 .note.a) libc_seen_a=yes ;;
1767 .note.b) libc_seen_b=yes ;;
1771 case "$libc_seen_a$libc_seen_b" in
1773 libc_cv_use_default_link=yes
1776 echo >&AS_MESSAGE_LOG_FD "\
1777 $libc_seen_a$libc_seen_b from:
1783 use_default_link=$libc_cv_use_default_link
1786 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1787 if libc_cv_output_format=`
1788 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1792 libc_cv_output_format=
1794 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1795 AC_SUBST(libc_cv_output_format)
1797 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1798 cat > conftest.c <<EOF
1801 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1802 conftest.c 1>&AS_MESSAGE_LOG_FD])
1804 libc_cv_fno_toplevel_reorder=yes
1806 libc_cv_fno_toplevel_reorder=no
1809 if test $libc_cv_fno_toplevel_reorder = yes; then
1810 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1812 fno_unit_at_a_time=-fno-unit-at-a-time
1814 AC_SUBST(fno_unit_at_a_time)
1816 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1817 cat > conftest.c <<EOF
1819 main () { return 0;}
1821 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
1822 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1829 AC_SUBST(libc_cv_ssp)
1831 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1832 cat > conftest.c <<EOF
1834 #ifdef __GNUC_GNU_INLINE__
1835 main () { return 0;}
1840 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1841 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1843 libc_cv_gnu89_inline=yes
1845 libc_cv_gnu89_inline=no
1848 if test $libc_cv_gnu89_inline = yes; then
1849 gnu89_inline=-fgnu89-inline
1853 AC_SUBST(gnu89_inline)
1855 AC_CACHE_CHECK(whether cc puts quotes around section names,
1856 libc_cv_have_section_quotes,
1857 [cat > conftest.c <<EOF
1858 static const int foo
1859 __attribute__ ((section ("bar"))) = 1;
1861 if ${CC-cc} -S conftest.c -o conftest.s; then
1862 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1863 libc_cv_have_section_quotes=yes
1865 libc_cv_have_section_quotes=no
1868 libc_cv_have_section_quotes=unknown
1870 rm -f conftest.{c,s}
1872 if test $libc_cv_have_section_quotes = yes; then
1873 AC_DEFINE(HAVE_SECTION_QUOTES)
1876 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1878 cat > conftest.s <<EOF
1880 ${libc_cv_asm_global_directive} foo
1883 .weak bar; bar = foo
1885 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1886 libc_cv_asm_weak_directive=yes
1888 libc_cv_asm_weak_directive=no
1892 if test $libc_cv_asm_weak_directive = no; then
1893 AC_CACHE_CHECK(for assembler .weakext directive,
1894 libc_cv_asm_weakext_directive,
1896 cat > conftest.s <<EOF
1898 ${libc_cv_asm_global_directive} foo
1902 ${libc_cv_asm_global_directive} baz
1905 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1906 libc_cv_asm_weakext_directive=yes
1908 libc_cv_asm_weakext_directive=no
1914 if test $libc_cv_asm_weak_directive = yes; then
1915 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1916 elif test $libc_cv_asm_weakext_directive = yes; then
1917 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1920 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1922 sparc/sparc64*) cfi_offset=2047;;
1925 cat > conftest.s <<EOF
1927 .type func,%function
1931 .cfi_rel_offset 1, $cfi_offset
1934 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1935 libc_cv_asm_cfi_directives=yes
1937 libc_cv_asm_cfi_directives=no
1940 if test $libc_cv_asm_cfi_directives = yes; then
1941 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1944 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1945 cat > conftest.c <<\EOF
1950 dnl No \ in command here because it ends up inside ''.
1951 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1952 -nostdlib -nostartfiles -Wl,--no-whole-archive
1953 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1954 libc_cv_ld_no_whole_archive=yes
1956 libc_cv_ld_no_whole_archive=no
1959 if test $libc_cv_ld_no_whole_archive = no; then
1960 AC_MSG_ERROR([support for --no-whole-archive is needed])
1963 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1964 cat > conftest.c <<\EOF
1969 dnl No \ in command here because it ends up inside ''.
1970 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1971 -nostdlib -nostartfiles -fexceptions
1972 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1973 libc_cv_gcc_exceptions=yes
1975 libc_cv_gcc_exceptions=no
1978 if test $libc_cv_gcc_exceptions = yes; then
1979 exceptions=-fexceptions
1981 AC_SUBST(exceptions)dnl
1983 if test "$host_cpu" = powerpc ; then
1984 # Check for a bug present in at least versions 2.8.x of GCC
1985 # and versions 1.0.x of EGCS.
1986 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1987 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1988 libc_cv_c_asmcr0_bug='no',
1989 libc_cv_c_asmcr0_bug='yes')])
1990 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1991 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1995 dnl Check whether compiler understands __builtin_expect.
1996 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1997 [cat > conftest.c <<EOF
1998 #line $LINENO "configure"
2001 a = __builtin_expect (a, 10);
2002 return a == 10 ? 0 : 1;
2005 dnl No \ in command here because it ends up inside ''.
2006 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
2007 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
2008 libc_cv_gcc_builtin_expect=yes
2010 libc_cv_gcc_builtin_expect=no
2013 if test "$libc_cv_gcc_builtin_expect" = no; then
2014 AC_MSG_ERROR([support for __builtin_expect needed])
2017 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
2018 cat > conftest.c <<\EOF
2021 __builtin_memset (x, 0, 1000);
2025 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
2027 libc_cv_gcc_builtin_memset=no
2029 libc_cv_gcc_builtin_memset=yes
2032 if test "$libc_cv_gcc_builtin_memset" = yes ; then
2033 AC_DEFINE(HAVE_BUILTIN_MEMSET)
2036 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
2037 cat > conftest.c <<\EOF
2038 extern char *strstr (const char *, const char *) __asm ("my_strstr");
2039 char *foo (const char *a, const char *b)
2041 return __builtin_strstr (a, b);
2045 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
2047 libc_cv_gcc_builtin_redirection=yes
2049 libc_cv_gcc_builtin_redirection=no
2052 if test "$libc_cv_gcc_builtin_redirection" = no; then
2053 AC_MSG_ERROR([support for the symbol redirection needed])
2056 dnl Check whether the compiler supports the __thread keyword.
2057 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
2058 [cat > conftest.c <<\EOF
2059 __thread int a = 42;
2061 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
2062 libc_cv_gcc___thread=yes
2064 libc_cv_gcc___thread=no
2067 if test "$libc_cv_gcc___thread" = no; then
2068 AC_MSG_ERROR([support for the __thread keyword is required])
2071 dnl Check whether the compiler supports the tls_model attribute.
2072 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
2073 cat > conftest.c <<\EOF
2074 extern __thread int a __attribute__((tls_model ("initial-exec")));
2076 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
2077 libc_cv_gcc_tls_model_attr=yes
2079 libc_cv_gcc_tls_model_attr=no
2082 if test "$libc_cv_gcc_tls_model_attr" = no; then
2083 AC_MSG_ERROR([support for the tls_model attribute is required])
2086 if test -n "$submachine"; then
2087 AC_CACHE_CHECK([for compiler option for CPU variant],
2088 libc_cv_cc_submachine, [dnl
2089 libc_cv_cc_submachine=no
2090 for opt in "-march=$submachine" "-mcpu=$submachine"; do
2091 if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
2092 libc_cv_cc_submachine="$opt"
2096 if test "x$libc_cv_cc_submachine" = xno; then
2097 AC_MSG_ERROR([${CC-cc} does not support $submachine])
2100 AC_SUBST(libc_cv_cc_submachine)
2102 dnl Check whether we have the gd library available.
2103 AC_MSG_CHECKING(for libgd)
2104 if test "$with_gd" != "no"; then
2105 old_CFLAGS="$CFLAGS"
2106 CFLAGS="$CFLAGS $libgd_include"
2107 old_LDFLAGS="$LDFLAGS"
2108 LDFLAGS="$LDFLAGS $libgd_ldflags"
2110 LIBS="$LIBS -lgd -lpng -lz -lm"
2111 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
2112 CFLAGS="$old_CFLAGS"
2113 LDFLAGS="$old_LDFLAGS"
2118 AC_MSG_RESULT($LIBGD)
2122 if test x$with_selinux = xno ; then
2125 # See if we have the SELinux library
2126 AC_CHECK_LIB(selinux, is_selinux_enabled,
2127 have_selinux=yes, have_selinux=no)
2128 # See if we have the SELinux header with the NSCD permissions in it.
2129 if test x$have_selinux = xyes ; then
2130 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
2131 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
2132 [#ifdef NSCD__SHMEMHOST
2135 #error NSCD__SHMEMHOST not defined
2137 have_selinux=yes, have_selinux=no)
2138 AC_MSG_RESULT($have_selinux)
2141 if test x$with_selinux = xyes ; then
2142 if test x$have_selinux = xno ; then
2143 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
2147 # Check if we're building with SELinux support.
2148 if test "x$have_selinux" = xyes; then
2149 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2151 # See if we have the libaudit library
2152 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2153 have_libaudit=yes, have_libaudit=no)
2154 if test "x$have_libaudit" = xyes; then
2155 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2157 AC_SUBST(have_libaudit)
2159 # See if we have the libcap library
2160 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2161 if test "x$have_libcap" = xyes; then
2162 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2164 AC_SUBST(have_libcap)
2166 AC_SUBST(have_selinux)
2168 dnl check for the size of 'long double'.
2169 AC_CHECK_SIZEOF(long double, 0)
2170 sizeof_long_double=$ac_cv_sizeof_long_double
2171 AC_SUBST(sizeof_long_double)
2173 ### End of automated tests.
2174 ### Now run sysdeps configure fragments.
2176 # They also can set these variables.
2178 ldd_rewrite_script=no
2179 libc_cv_sysconfdir=$sysconfdir
2180 libc_cv_gcc_unwind_find_fde=no
2183 # Iterate over all the sysdep directories we will use, running their
2184 # configure fragments.
2185 for dir in $sysnames; do
2188 *) dest=$srcdir/$dir ;;
2190 if test -r $dest/configure; then
2191 AC_MSG_RESULT(running configure fragment for $dir)
2196 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2197 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2199 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2201 # Test for old glibc 2.0.x headers so that they can be removed properly
2202 # Search only in includedir.
2203 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2204 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2206 old_glibc_headers=yes
2208 old_glibc_headers=no
2210 AC_MSG_RESULT($old_glibc_headers)
2211 if test ${old_glibc_headers} = yes; then
2212 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2213 AC_MSG_WARN(*** be removed.)
2215 AC_SUBST(old_glibc_headers)
2217 AC_SUBST(libc_cv_slibdir)
2218 AC_SUBST(libc_cv_localedir)
2219 AC_SUBST(libc_cv_sysconfdir)
2220 AC_SUBST(libc_cv_rootsbindir)
2221 AC_SUBST(libc_cv_forced_unwind)
2223 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2224 AC_SUBST(libc_cv_cpp_asm_debuginfo)
2225 AC_SUBST(libc_cv_cc_sse4)
2226 AC_SUBST(libc_cv_cc_avx)
2227 AC_SUBST(libc_cv_cc_novzeroupper)
2228 AC_SUBST(libc_cv_cc_fma4)
2229 AC_SUBST(libc_cv_as_i686)
2231 AC_SUBST(use_ldconfig)
2232 AC_SUBST(ldd_rewrite_script)
2237 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2238 [libc_cv_pic_default=yes
2239 cat > conftest.c <<EOF
2240 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2241 # error PIC is default.
2244 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2245 libc_cv_pic_default=no
2248 AC_SUBST(libc_cv_pic_default)
2252 AC_SUBST(static_nss)
2253 AC_SUBST(nopic_initfini)
2257 dnl See sysdeps/mach/configure.in for this variable.
2258 AC_SUBST(mach_interface_list)
2260 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2263 config_makefile=Makefile
2266 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2267 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2271 AC_CONFIG_FILES([config.make ${config_makefile}])
2272 AC_CONFIG_COMMANDS([default],[[
2273 case $CONFIG_FILES in *config.make*)
2274 echo "$config_vars" >> config.make;;
2276 test -d bits || mkdir bits]],[[config_vars='$config_vars']])