1 dnl Process this file with autoconf to produce a configure script.
2 AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required.
3 AC_INIT([GNU C Library], [(see version.h)], [http://sourceware.org/bugzilla/], [glibc])
4 AC_CONFIG_SRCDIR([include/features.h])
5 AC_CONFIG_HEADERS([config.h])
6 AC_CONFIG_AUX_DIR([scripts])
8 dnl This is here so we can set $subdirs directly based on configure fragments.
14 if test $host != $build; then
15 AC_CHECK_PROGS(BUILD_CC, gcc cc)
17 AC_SUBST(cross_compiling)
19 # We need the C++ compiler only for testing.
22 if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
23 AC_MSG_ERROR([you must configure in a separate build directory])
26 # This will get text that should go into config.make.
29 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
31 AC_HELP_STRING([--with-gd=DIR],
32 [find libgd include dir and library with prefix DIR]),
36 *) libgd_include="-I$withval/include"
37 libgd_ldflags="-L$withval/lib" ;;
40 AC_ARG_WITH([gd-include],
41 AC_HELP_STRING([--with-gd-include=DIR],
42 [find libgd include files in DIR]),
44 case "$with_gd_include" in
46 *) libgd_include="-I$withval" ;;
50 AC_HELP_STRING([--with-gd-lib=DIR],
51 [find libgd library files in DIR]),
53 case "$with_gd_lib" in
55 *) libgd_ldflags="-L$withval" ;;
59 if test -n "$libgd_include"; then
60 config_vars="$config_vars
61 CFLAGS-memusagestat.c = $libgd_include"
63 if test -n "$libgd_ldflags"; then
64 config_vars="$config_vars
65 libgd-LDFLAGS = $libgd_ldflags"
68 dnl Arguments to specify presence of other packages/features.
70 AC_HELP_STRING([--with-fp],
71 [if using floating-point hardware @<:@default=yes@:>@]),
75 AC_ARG_WITH([binutils],
76 AC_HELP_STRING([--with-binutils=PATH],
77 [specify location of binutils (as and ld)]),
78 [path_binutils=$withval],
80 AC_ARG_WITH([selinux],
81 AC_HELP_STRING([--with-selinux],
82 [if building with SELinux support]),
83 [with_selinux=$withval],
86 AC_ARG_WITH([headers],
87 AC_HELP_STRING([--with-headers=PATH],
88 [location of system headers to use
89 (for example /usr/src/linux/include)
90 @<:@default=compiler default@:>@]),
91 [sysheaders=$withval],
94 AC_SUBST(use_default_link)
95 AC_ARG_WITH([default-link],
96 AC_HELP_STRING([--with-default-link],
97 [do not use explicit linker scripts]),
98 [use_default_link=$withval],
99 [use_default_link=default])
101 AC_ARG_ENABLE([sanity-checks],
102 AC_HELP_STRING([--disable-sanity-checks],
103 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
104 [enable_sanity=$enableval],
107 AC_SUBST(enable_check_abi)
108 AC_ARG_ENABLE([check-abi],
109 AC_HELP_STRING([--enable-check-abi],
110 [do "make check-abi" in "make check" (no/warn/yes)
111 @<:@default=no@:>@]),
112 [enable_check_abi=$enableval],
113 [enable_check_abi=no])
115 dnl Arguments to enable or disable building the static, shared, profiled,
116 dnl and -fomit-frame-pointer libraries.
117 dnl I've disabled this for now since we cannot build glibc without static
118 dnl libraries built in the moment.
119 dnl AC_ARG_ENABLE([static],
120 dnl AC_HELP_STRING([--enable-static],
121 dnl [build static library @<:@default=yes@:>@]),
122 dnl [static=$enableval],
125 AC_ARG_ENABLE([shared],
126 AC_HELP_STRING([--enable-shared],
127 [build shared library @<:@default=yes if GNU ld@:>@]),
130 AC_ARG_ENABLE([profile],
131 AC_HELP_STRING([--enable-profile],
132 [build profiled library @<:@default=no@:>@]),
133 [profile=$enableval],
135 AC_ARG_ENABLE([versioning],
136 AC_HELP_STRING([--disable-versioning],
137 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
138 [enable_versioning=$enableval],
139 [enable_versioning=yes])
141 AC_ARG_ENABLE([oldest-abi],
142 AC_HELP_STRING([--enable-oldest-abi=ABI],
143 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
144 [oldest_abi=$enableval],
146 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
149 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
153 AC_ARG_ENABLE([stackguard-randomization],
154 AC_HELP_STRING([--enable-stackguard-randomization],
155 [initialize __stack_chk_guard canary with a random number at program start]),
156 [enable_stackguard_randomize=$enableval],
157 [enable_stackguard_randomize=no])
158 if test "$enable_stackguard_randomize" = yes; then
159 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
162 dnl Generic infrastructure for drop-in additions to libc.
163 AC_ARG_ENABLE([add-ons],
164 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
165 [configure and build add-ons in DIR1,DIR2,...
166 search for add-ons if no parameter given]),
167 , [enable_add_ons=yes])
169 AC_ARG_ENABLE([hidden-plt],
170 AC_HELP_STRING([--disable-hidden-plt],
171 [do not hide internal function calls to avoid PLT]),
174 if test "x$hidden" = xno; then
178 AC_ARG_ENABLE([bind-now],
179 AC_HELP_STRING([--enable-bind-now],
180 [disable lazy relocations in DSOs]),
181 [bindnow=$enableval],
185 dnl On some platforms we cannot use dynamic loading. We must provide
186 dnl static NSS modules.
187 AC_ARG_ENABLE([static-nss],
188 AC_HELP_STRING([--enable-static-nss],
189 [build static NSS modules @<:@default=no@:>@]),
190 [static_nss=$enableval],
192 dnl Enable static NSS also if we build no shared objects.
193 if test x"$static_nss" = xyes || test x"$shared" = xno; then
195 AC_DEFINE(DO_STATIC_NSS)
198 AC_ARG_ENABLE([force-install],
199 AC_HELP_STRING([--disable-force-install],
200 [don't force installation of files from this package, even if they are older than the installed files]),
201 [force_install=$enableval],
203 AC_SUBST(force_install)
205 dnl On some platforms we allow dropping compatibility with all kernel
207 AC_ARG_ENABLE([kernel],
208 AC_HELP_STRING([--enable-kernel=VERSION],
209 [compile for compatibility with kernel not older than VERSION]),
210 [minimum_kernel=$enableval],
212 dnl Prevent unreasonable values.
213 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
214 # Better nothing than this.
217 if test "$minimum_kernel" = current; then
218 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
222 dnl For the development we sometimes want gcc to issue even more warnings.
223 dnl This is not the default since many of the extra warnings are not
225 AC_ARG_ENABLE([all-warnings],
226 AC_HELP_STRING([--enable-all-warnings],
227 [enable all useful warnings gcc can issue]),
228 [all_warnings=$enableval],
230 AC_SUBST(all_warnings)
232 AC_ARG_ENABLE([multi-arch],
233 AC_HELP_STRING([--enable-multi-arch],
234 [enable single DSO with optimizations for multiple architectures]),
235 [multi_arch=$enableval],
236 [multi_arch=default])
238 AC_ARG_ENABLE([nss-crypt],
239 AC_HELP_STRING([--enable-nss-crypt],
240 [enable libcrypt to use nss]),
241 [nss_crypt=$enableval],
243 if test x$nss_crypt = xyes; then
244 nss_includes=-I$(nss-config --includedir 2>/dev/null)
245 if test $? -ne 0; then
246 AC_MSG_ERROR([cannot find include directory with nss-config])
249 CFLAGS="$CFLAGS $nss_includes"
250 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
252 #include <nsslowhash.h>
253 void f (void) { NSSLOW_Init (); }])],
254 libc_cv_nss_crypt=yes,
256 cannot find NSS headers with lowlevel hash function interfaces]))
258 LIBS="$LIBS -lfreebl3"
259 AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
261 #include <nsslowhash.h>],
263 libc_cv_nss_crypt=yes,
265 cannot link program using lowlevel NSS hash functions]))
271 AC_SUBST(libc_cv_nss_crypt)
273 # The way shlib-versions is used to generate soversions.mk uses a
274 # fairly simplistic model for name recognition that can't distinguish
275 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
276 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
277 # tell. This doesn't get used much beyond that, so it's fairly safe.
282 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
286 # We keep the original values in `$config_*' and never modify them, so we
287 # can write them unchanged into config.make. Everything else uses
288 # $machine, $vendor, and $os, and changes them whenever convenient.
289 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
291 # Don't allow vendor == "unknown"
292 test "$config_vendor" = unknown && config_vendor=
293 config_os="`echo $config_os | sed 's/^unknown-//'`"
295 # Some configurations imply other options.
298 # The configure fragment of an add-on port can modify these to supplement
299 # or override the table in the case statement below. No fragment should
300 # ever change the config_* variables, however.
301 machine=$config_machine
302 vendor=$config_vendor
306 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
308 if test "$machine" = rs6000; then
312 # Braindead PowerPC box with absolutely no FPU.
313 case "$machine-$host_os" in
321 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
324 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
326 *) submachine="$withval" ;;
330 # An add-on can set this when it wants to disable the sanity check below.
333 dnl Having this here, though empty, makes sure that if add-ons' fragments
334 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
335 dnl our AC_OUTPUT will actually use it.
338 case "$enable_add_ons" in
341 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
342 sed 's@/[[^/]]*$@@' | sort | uniq`
343 add_ons_automatic=yes
345 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
346 add_ons_automatic=no ;;
352 if test x"$add_ons" != x; then
353 for f in $add_ons; do
358 *** It seems that you're using an old \`crypt' add-on. crypt is now
359 *** part of glibc and using the old add-on will not work with this
360 *** release. Start again with fresh sources and without the old
361 *** \`crypt' add-on.])
365 *** It seems that you're using an old \`localedata' add-on. localedata
366 *** is now part of glibc and using the old add-on will not work with
367 *** this release. Start again with fresh sources and without the old
368 *** \`localedata' add-on.])
373 # Now source each add-on's configure fragment.
374 # The fragments can use $srcdir/$libc_add_on to find themselves,
375 # and test $add_ons_automatic to see if they were explicitly requested.
376 # A fragment can clear (or even change) $libc_add_on to affect
377 # whether it goes into the list to be actually used in the build.
379 for libc_add_on in $add_ons; do
380 # Test whether such a directory really exists.
381 # It can be absolute, or relative to $srcdir, or relative to the build dir.
382 case "$libc_add_on" in
384 libc_add_on_srcdir=$libc_add_on
387 test -d "$srcdir/$libc_add_on" || {
388 if test -d "$libc_add_on"; then
389 libc_add_on="`pwd`/$libc_add_on"
391 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
394 libc_add_on_srcdir=$srcdir/$libc_add_on
398 libc_add_on_frag=$libc_add_on_srcdir/configure
399 libc_add_on_canonical=
400 libc_add_on_config_subdirs=
401 if test -r "$libc_add_on_frag"; then
402 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
403 libc_add_on_canonical=unknown
405 . "$libc_add_on_frag"
406 test -z "$libc_add_on" || {
407 configured_add_ons="$configured_add_ons $libc_add_on"
408 if test "x$libc_add_on_canonical" = xunknown; then
409 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
411 for d in $libc_add_on_subdirs; do
412 case "$libc_add_on" in
413 /*) subdir_srcdir="$libc_add_on" ;;
414 *) subdir_srcdir="\$(..)$libc_add_on" ;;
418 d="${libc_add_on_canonical:-$libc_add_on}"
424 subdir_srcdir="$subdir_srcdir/$d"
427 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
428 add_on_subdirs="$add_on_subdirs $d"
429 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
430 $d-srcdir = $subdir_srcdir"
432 for d in $libc_add_on_config_subdirs; do
435 fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
437 if test ! -d "$libc_add_on_srcdir/$d"; then
438 AC_MSG_ERROR(fragment wants to configure missing directory $d)
440 case "$libc_add_on" in
442 relative path required for add-on using \$libc_add_on_config_subdirs) ;;
444 subdirs="$subdirs $libc_add_on/$d"
448 if test -n "$libc_add_on"; then
449 if frags=`ls -d $libc_add_on_srcdir/sysdeps/*/preconfigure 2> /dev/null`
451 AC_MSG_CHECKING(add-on $libc_add_on for preconfigure fragments)
452 for frag in $frags; do
453 name=`echo "$frag" | sed 's@/[[^/]]*$@@;s@^.*/@@'`
454 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
459 use_add_ons="$use_add_ons $libc_add_on"
460 add_ons_pfx="$add_ons_pfx $libc_add_on/"
461 test -z "$libc_add_on_canonical" ||
462 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
465 # Use echo to strip excess whitespace.
466 add_ons="`echo $use_add_ons`"
469 AC_SUBST(add_on_subdirs)
473 ### I put this here to prevent those annoying emails from people who cannot
474 ### read and try to compile glibc on unsupported platforms. --drepper
476 ### By using the undocumented --enable-hacker-mode option for configure
477 ### one can skip this test to make the configuration not fail for unsupported
480 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
481 case "$machine-$host_os" in
482 *-linux* | *-gnu* | arm*-none*)
485 echo "*** The GNU C library is currently not available for this platform."
486 echo "*** So far nobody cared to port it and if there is no volunteer it"
487 echo "*** might never happen. So, if you have interest to see glibc on"
488 echo "*** this platform visit"
489 echo "*** http://www.gnu.org/software/libc/porting.html"
490 echo "*** and join the group of porters"
496 dnl We need to use [ and ] for other purposes for a while now.
498 # Expand the configuration machine name into a subdirectory by architecture
499 # type and particular chip. If an add-on configure fragment already set
500 # base_machine, we don't change it.
501 test -n "$base_machine" || case "$machine" in
502 i[34567]86) base_machine=i386 machine=i386/$machine ;;
503 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
504 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
505 s390) base_machine=s390 machine=s390/s390-32 ;;
506 s390x) base_machine=s390 machine=s390/s390-64 ;;
507 sh3*) base_machine=sh machine=sh/sh3 ;;
508 sh4*) base_machine=sh machine=sh/sh4 ;;
510 base_machine=sparc machine=sparc/sparc32 ;;
511 sparcv8 | supersparc | hypersparc)
512 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
513 sparcv8plus | sparcv8plusa | sparcv9)
514 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
515 sparcv8plusb | sparcv9b)
516 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
518 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
520 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
522 base_machine=sparc machine=sparc/sparc64 ;;
524 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
526 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
528 base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
529 *) base_machine=$machine ;;
532 AC_SUBST(base_machine)
534 if test "$base_machine" = "i386"; then
535 AC_DEFINE(USE_REGPARMS)
538 # For the multi-arch option we need support in the assembler.
539 AC_CACHE_CHECK([for assembler gnu_indirect_function symbol type support],
540 libc_cv_asm_gnu_indirect_function, [dnl
541 cat > conftest.s <<EOF
542 .type foo,%gnu_indirect_function
544 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD;
546 libc_cv_asm_gnu_indirect_function=yes
548 libc_cv_asm_gnu_indirect_function=no
552 AC_MSG_CHECKING(whether .text pseudo-op must be used)
553 AC_CACHE_VAL(libc_cv_dot_text, [dnl
554 cat > conftest.s <<EOF
558 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
559 libc_cv_dot_text=.text
562 if test -z "$libc_cv_dot_text"; then
568 AC_CACHE_CHECK(for assembler global-symbol directive,
569 libc_cv_asm_global_directive, [dnl
570 libc_cv_asm_global_directive=UNKNOWN
571 for ac_globl in .globl .global .EXPORT; do
572 cat > conftest.s <<EOF
577 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
578 libc_cv_asm_global_directive=${ac_globl}
581 test $libc_cv_asm_global_directive != UNKNOWN && break
583 if test $libc_cv_asm_global_directive = UNKNOWN; then
584 AC_MSG_ERROR(cannot determine asm global directive)
586 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
589 AC_CACHE_CHECK(for assembler .type directive prefix,
590 libc_cv_asm_type_prefix, [dnl
591 libc_cv_asm_type_prefix=no
592 for ac_try_prefix in '@' '%' '#'; do
593 cat > conftest.s <<EOF
595 ${libc_cv_asm_global_directive} foo
596 .type foo, ${ac_try_prefix}object
601 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
602 libc_cv_asm_type_prefix=${ac_try_prefix}
605 test "x$libc_cv_asm_type_prefix" != xno && break
607 if test "x$libc_cv_asm_type_prefix" != xno; then
608 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
611 if test x"$libc_cv_asm_gnu_indirect_function" != xyes -a x"$libc_cv_asm_type_prefix" = xno; then
612 if test x"$multi_arch" = xyes; then
613 AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
618 if test x"$multi_arch" != xno; then
619 multi_arch_d=/multiarch
622 # Compute the list of sysdep directories for this configuration.
623 # This can take a while to compute.
624 sysdep_dir=$srcdir/sysdeps
625 AC_MSG_CHECKING(sysdep dirs)
626 dnl We need to use [ and ] for other purposes for a while now.
628 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
629 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
631 test "x$base_os" != x || case "$os" in
634 netbsd* | 386bsd* | freebsd* | bsdi*)
635 base_os=unix/bsd/bsd4.4 ;;
636 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
638 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
641 base_os=unix/sysv/irix6/$os ;;
643 base_os=unix/sysv/sysv4 ;;
645 base_os=standalone ;;
648 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
651 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
655 o=`echo $tail | sed 's/[0-9]*$//'`
656 if test $o != $tail; then
659 # For linux-gnu, try linux-gnu, then linux.
660 o=`echo $tail | sed 's/-.*$//'`
661 if test $o != $tail; then
665 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
668 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
674 # For sparc/sparc32, try sparc/sparc32 and then sparc.
676 tail=$machine${submachine:+/$submachine}
677 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
679 # Prepend the machine's FPU directory unless --without-fp.
680 if test "$with_fp" = yes; then
683 mach="$mach /$1/nofpu"
689 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
692 # Find what sysdep directories exist.
695 for b in $base ''; do
696 for m0 in $mach ''; do
697 for v in /$vendor ''; do
698 test "$v" = / && continue
699 for o in /$ostry ''; do
700 test "$o" = / && continue
701 for m in $multi_arch_d $mach ''; do
702 for d in $add_ons_pfx ''; do
703 for a in $add_ons_sfx ''; do
704 if test -n "$m0$m0sub$b$v$o$m$msub"; then
705 try_srcdir="${srcdir}/"
709 try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
710 test -n "$enable_debug_configure" &&
711 echo "$0 [DEBUG]: try $try" >&2
712 if test -d "$try_srcdir$try"; then
713 sysnames="$sysnames $try"
714 { test -n "$o" || test -n "$b"; } && os_used=t
715 { test -n "$m" || test -n "$m0"; } && machine_used=t
717 x*/$submachine) submachine_used=t ;;
719 if test -n "$d"; then
720 case "$sysnames_add_ons" in
722 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
735 # If the assembler supports gnu_indirect_function symbol type and the
736 # architecture supports multi-arch, we enable multi-arch by default.
737 case $sysnames_add_ons$sysnames in
741 test x"$multi_arch" = xdefault && multi_arch=no
744 if test x"$multi_arch" != xno; then
745 AC_DEFINE(USE_MULTIARCH)
749 if test -z "$os_used" && test "$os" != none; then
750 AC_MSG_ERROR(Operating system $os is not supported.)
752 if test -z "$machine_used" && test "$machine" != none; then
753 AC_MSG_ERROR(The $machine is not supported.)
755 if test -z "$submachine_used" && test -n "$submachine"; then
756 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
760 # We have now validated the configuration.
763 # Look for an `elf' subdirectory of each machine directory.
764 # We prepend these rather than inserting them whereever the machine appears
765 # because things specified by the machine's ELF ABI should override
766 # OS-specific things, and should always be the same for any OS on the
767 # machine (otherwise what's the point of an ABI?).
769 for d in $add_ons_pfx ''; do
771 if test -d $srcdir/${d}sysdeps$m/elf; then
772 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
776 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
779 # Expand the list of system names into a full list of directories
780 # from each element's parent name and Implies file (if present).
783 while test $# -gt 0; do
787 case " $names " in *" $name "*)
788 # Already in the list.
792 # Report each name as we discover it, so there is no long pause in output.
793 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
795 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
799 *) xsrcdir=$srcdir/ ;;
801 test -n "$enable_debug_configure" &&
802 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
804 if test -f $xsrcdir$name/Implies; then
805 # Collect more names from the `Implies' file (removing comments).
806 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
808 for x in $implied_candidate; do
810 if test -d $xsrcdir$name_base/$x; then
811 implied="$implied $name_base/$x";
814 for d in $add_ons_pfx ''; do
818 *) try_srcdir=$srcdir/ ;;
820 test -n "$enable_debug_configure" &&
821 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
822 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
824 implied="$implied $try"
826 case "$sysnames_add_ons" in
828 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
832 if test $found = no; then
833 AC_MSG_WARN($name/Implies specifies nonexistent $x)
840 # Add NAME to the list of names.
843 # Find the parent of NAME, using the empty string if it has none.
845 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
848 # Add the names implied by NAME, and NAME's parent (if it has one), to
849 # the list of names to be processed (the argument list). We prepend the
850 # implied names to the list and append the parent. We want implied
851 # directories to come before further directories inferred from the
852 # configuration components; this ensures that for sysv4, unix/common
853 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
855 sysnames="`echo $implied $* $parent`"
856 test -n "$sysnames" && set $sysnames
859 # Add the default directories.
860 default_sysnames="sysdeps/generic/elf sysdeps/generic"
861 sysnames="$names $default_sysnames"
863 # The other names were emitted during the scan.
864 AC_MSG_RESULT($default_sysnames)
866 # Collect the list of add-ons that supply partial sysdeps trees.
868 for add_on in $add_ons; do
871 *) xsrcdir="$srcdir/" ;;
874 test -d "$xsrcdir$add_on/sysdeps" || {
875 case "$configured_add_ons " in
878 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
884 sysdeps_add_ons="$sysdeps_add_ons $add_on"
885 case "$sysnames_add_ons" in
888 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
893 for d in $sysnames; do
895 $add_on/sysdeps/*) ;;
898 (cd "$xsrcdir$d" && for f in *[[!~]]; do
902 test -d "$ff" || { test -e "$ff" && exit 88; }
906 test -d "$f" || { test -e "$f" && exit 88; }
910 if test $? -eq 88; then
915 if test $found = no; then
916 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
919 AC_SUBST(sysdeps_add_ons)
925 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
926 # The makefiles need to use a different form to find it in $srcdir.
927 INSTALL='\$(..)./scripts/install-sh -c'
932 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
934 # Accept binutils 2.13 or newer.
935 AC_CHECK_PROG_VER(AS, $AS, --version,
936 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
937 [2.1[3-9]*|2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as")
938 AC_CHECK_PROG_VER(LD, $LD, --version,
939 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
940 [2.1[3-9]*|2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
942 # We need the physical current working directory. We cannot use the
943 # "pwd -P" shell builtin since that's not portable. Instead we try to
944 # find a pwd binary. Note that assigning to the PWD environment
945 # variable might have some interesting side effects, so we don't do
947 AC_PATH_PROG(PWD_P, pwd, no)
948 if test "$PWD_P" = no; then
949 AC_MSG_ERROR(*** A pwd binary could not be found.)
952 # These programs are version sensitive.
954 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
955 [version \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ],
956 critic_missing="$critic_missing gcc")
957 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
958 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
959 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
961 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
962 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
963 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
964 MSGFMT=: aux_missing="$aux_missing msgfmt")
965 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
966 [GNU texinfo.* \([0-9][0-9.]*\)],
968 MAKEINFO=: aux_missing="$aux_missing makeinfo")
969 AC_CHECK_PROG_VER(SED, sed, --version,
970 [GNU sed version \([0-9]*\.[0-9.]*\)],
971 [3.0[2-9]*|3.[1-9]*|[4-9]*],
972 SED=: aux_missing="$aux_missing sed")
974 AC_CHECK_TOOL(READELF, readelf, false)
976 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
978 xno|x|x:) AUTOCONF=no ;;
981 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
982 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
983 libc_cv_autoconf_works=yes
985 libc_cv_autoconf_works=no
987 test $libc_cv_autoconf_works = yes || AUTOCONF=no
990 if test "x$AUTOCONF" = xno; then
991 aux_missing="$aux_missing autoconf"
994 test -n "$critic_missing" && AC_MSG_ERROR([
995 *** These critical programs are missing or too old:$critic_missing
996 *** Check the INSTALL file for required versions.])
998 test -n "$aux_missing" && AC_MSG_WARN([
999 *** These auxiliary programs are missing or incompatible versions:$aux_missing
1000 *** some features will be disabled.
1001 *** Check the INSTALL file for required versions.])
1003 # if using special system headers, find out the compiler's sekrit
1004 # header directory and add that to the list. NOTE: Only does the right
1005 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
1006 if test -n "$sysheaders"; then
1007 SYSINCLUDES=-nostdinc
1008 for d in include include-fixed; do
1009 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
1010 SYSINCLUDES="$SYSINCLUDES -isystem $i"
1012 SYSINCLUDES="$SYSINCLUDES \
1013 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
1014 if test -n "$CXX"; then
1016 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
1017 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
1018 for d in include "$cxxmachine/include"; do
1019 i=../../../../$d/c++/$cxxversion
1020 cxxheaders=`$CXX -print-file-name="$i"` &&
1021 test "x$cxxheaders" != x && test "x$i" != "x$cxxheaders" &&
1022 CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders \
1023 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
1027 AC_SUBST(SYSINCLUDES)
1028 AC_SUBST(CXX_SYSINCLUDES)
1030 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1031 # since this would lead to problems installing/building glibc.
1032 # LD_LIBRARY_PATH contains the current directory if one of the following
1034 # - one of the terminals (":" and ";") is the first or last sign
1035 # - two terminals occur directly after each other
1036 # - the path contains an element with a dot in it
1037 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1039 case ${LD_LIBRARY_PATH} in
1040 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1041 ld_library_path_setting="contains current directory"
1044 ld_library_path_setting="ok"
1048 AC_MSG_RESULT($ld_library_path_setting)
1049 if test "$ld_library_path_setting" != "ok"; then
1051 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1052 *** building glibc. Please change the environment variable
1053 *** and run configure again.])
1056 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1057 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
1058 libc_cv_gcc_static_libgcc=
1060 libc_cv_gcc_static_libgcc=-static-libgcc
1062 AC_SUBST(libc_cv_gcc_static_libgcc)
1064 AC_PATH_PROG(BASH_SHELL, bash, no)
1065 if test "$BASH_SHELL" != no &&
1066 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1067 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1068 libc_cv_have_bash2=yes
1070 libc_cv_have_bash2=no
1072 AC_SUBST(libc_cv_have_bash2)
1074 dnl We need a ksh compatible shell for tzselect.
1075 if test "$BASH_SHELL" = no; then
1076 AC_PATH_PROG(KSH, ksh, no)
1077 if test "$KSH" = no; then
1080 libc_cv_have_ksh=yes
1085 libc_cv_have_ksh=yes
1087 AC_SUBST(libc_cv_have_ksh)
1090 AC_PATH_PROG(PERL, perl, no)
1091 if test "$PERL" != no &&
1092 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1095 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1096 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1097 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1099 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
1100 echo '#include <stddef.h>
1101 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
1102 if eval "$ac_cpp conftest.c 2>/dev/null" \
1103 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
1104 libc_cv_signed_size_t=no
1106 libc_cv_signed_size_t=yes
1109 if test $libc_cv_signed_size_t = yes; then
1110 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
1111 cat >> confdefs.h <<\EOF
1112 #undef __SIZE_TYPE__
1113 #define __SIZE_TYPE__ unsigned
1117 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1119 [#define __need_size_t
1120 #define __need_wchar_t
1123 #include <stddef.h>], [size_t size; wchar_t wchar;
1125 #error stddef.h ignored __need_*
1127 if (&size == NULL || &wchar == NULL) abort ();],
1128 libc_cv_friendly_stddef=yes,
1129 libc_cv_friendly_stddef=no)])
1130 if test $libc_cv_friendly_stddef = yes; then
1131 config_vars="$config_vars
1132 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1135 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1136 libc_cv_need_minus_P, [dnl
1137 cat > conftest.S <<EOF
1138 #include "confdefs.h"
1139 /* Nothing whatsoever. */
1141 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1142 libc_cv_need_minus_P=no
1144 libc_cv_need_minus_P=yes
1147 if test $libc_cv_need_minus_P = yes; then
1148 config_vars="$config_vars
1149 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1152 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1153 cat > conftest.s <<EOF
1156 .set glibc_conftest_frobozz,foo
1157 $libc_cv_asm_global_directive glibc_conftest_frobozz
1159 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1160 # (but it doesn't work), so we must do a linking check to be sure.
1161 cat > conftest1.c <<\EOF
1162 extern int glibc_conftest_frobozz;
1163 void _start() { glibc_conftest_frobozz = 1; }
1165 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1166 -nostartfiles -nostdlib \
1167 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1168 libc_cv_asm_set_directive=yes
1170 libc_cv_asm_set_directive=no
1173 if test $libc_cv_asm_set_directive = yes; then
1174 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1177 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1178 libc_cv_asm_unique_object, [dnl
1179 cat > conftest.s <<EOF
1182 .type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
1184 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1185 libc_cv_asm_unique_object=yes
1187 libc_cv_asm_unique_object=no
1190 if test $libc_cv_asm_unique_object = yes; then
1191 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1194 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1195 [cat > conftest.s <<EOF
1198 .symver _sym,sym@VERS
1200 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1201 libc_cv_asm_symver_directive=yes
1203 libc_cv_asm_symver_directive=no
1206 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1207 if test $libc_cv_asm_symver_directive = yes; then
1208 cat > conftest.s <<EOF
1211 .symver _sym,sym@VERS
1213 cat > conftest.map <<EOF
1222 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1223 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1224 -o conftest.so conftest.o
1225 -nostartfiles -nostdlib
1226 -Wl,--version-script,conftest.map
1227 1>&AS_MESSAGE_LOG_FD]);
1229 libc_cv_ld_version_script_option=yes
1231 libc_cv_ld_version_script_option=no
1234 libc_cv_ld_version_script_option=no
1237 libc_cv_ld_version_script_option=no
1240 if test $shared != no &&
1241 test $libc_cv_asm_symver_directive = yes &&
1242 test $libc_cv_ld_version_script_option = yes &&
1243 test $enable_versioning = yes; then
1245 AC_DEFINE(DO_VERSIONING)
1249 AC_SUBST(VERSIONING)
1251 if test $shared != no && test $VERSIONING = no; then
1253 *** WARNING: You should not compile GNU libc without versioning. Not using
1254 *** versioning will introduce incompatibilities so that old binaries
1255 *** will not run anymore.
1256 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1258 AC_CACHE_CHECK(for .previous assembler directive,
1259 libc_cv_asm_previous_directive, [dnl
1260 cat > conftest.s <<EOF
1261 .section foo_section
1264 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1265 libc_cv_asm_previous_directive=yes
1267 libc_cv_asm_previous_directive=no
1270 if test $libc_cv_asm_previous_directive = yes; then
1271 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1273 AC_CACHE_CHECK(for .popsection assembler directive,
1274 libc_cv_asm_popsection_directive, [dnl
1275 cat > conftest.s <<EOF
1276 .pushsection foo_section
1279 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1280 libc_cv_asm_popsection_directive=yes
1282 libc_cv_asm_popsection_directive=no
1285 if test $libc_cv_asm_popsection_directive = yes; then
1286 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1289 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1290 libc_cv_asm_protected_directive, [dnl
1291 cat > conftest.s <<EOF
1297 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1298 libc_cv_asm_protected_directive=yes
1300 AC_MSG_ERROR(assembler support for symbol visibility is required)
1304 if test $libc_cv_asm_protected_directive = yes; then
1305 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1306 libc_cv_visibility_attribute,
1307 [cat > conftest.c <<EOF
1308 int foo __attribute__ ((visibility ("hidden"))) = 1;
1309 int bar __attribute__ ((visibility ("protected"))) = 1;
1311 libc_cv_visibility_attribute=no
1312 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1313 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1314 if grep '\.protected.*bar' conftest.s >/dev/null; then
1315 libc_cv_visibility_attribute=yes
1319 rm -f conftest.{c,s}
1321 if test $libc_cv_visibility_attribute != yes; then
1322 AC_MSG_ERROR(compiler support for visibility attribute is required)
1326 if test $libc_cv_visibility_attribute = yes; then
1327 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1328 libc_cv_broken_visibility_attribute,
1329 [cat > conftest.c <<EOF
1331 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1332 int bar (int x) { return x; }
1334 libc_cv_broken_visibility_attribute=yes
1335 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1337 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1339 libc_cv_broken_visibility_attribute=no
1342 rm -f conftest.c conftest.s
1344 if test $libc_cv_broken_visibility_attribute = yes; then
1345 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1349 AC_CACHE_CHECK(for broken __attribute__((alias())),
1350 libc_cv_broken_alias_attribute,
1351 [cat > conftest.c <<EOF
1352 extern int foo (int x) __asm ("xyzzy");
1353 int bar (int x) { return x; }
1354 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1356 extern __typeof (dfoo) dfoo __asm ("abccb");
1359 libc_cv_broken_alias_attribute=yes
1360 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1361 if grep 'xyzzy' conftest.s >/dev/null &&
1362 grep 'abccb' conftest.s >/dev/null; then
1363 libc_cv_broken_alias_attribute=no
1366 rm -f conftest.c conftest.s
1368 if test $libc_cv_broken_alias_attribute = yes; then
1369 AC_MSG_ERROR(working alias attribute support required)
1372 if test $libc_cv_visibility_attribute = yes; then
1373 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1374 libc_cv_have_sdata_section,
1375 [echo "int i;" > conftest.c
1376 libc_cv_have_sdata_section=no
1377 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1378 | grep '\.sdata' >/dev/null; then
1379 libc_cv_have_sdata_section=yes
1381 rm -f conftest.c conftest.so
1383 if test $libc_cv_have_sdata_section = yes; then
1384 AC_DEFINE(HAVE_SDATA_SECTION)
1388 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1389 libc_cv_initfini_array, [dnl
1390 cat > conftest.c <<EOF
1391 int _start (void) { return 0; }
1392 int __start (void) { return 0; }
1393 int foo (void) { return 1; }
1394 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1396 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1397 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1399 if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1400 libc_cv_initfini_array=yes
1402 libc_cv_initfini_array=no
1405 libc_cv_initfini_array=no
1408 if test $libc_cv_initfini_array != yes; then
1409 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1412 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1413 libc_cv_ctors_header, [dnl
1414 libc_cv_ctors_header=yes
1416 __attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
1417 __attribute__ ((destructor)) void dtor (void) { puts("dtor"); }
1420 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1421 { gsub(/\@<:@ */, "@<:@") }
1422 $2 == ".ctors" || $2 == ".dtors" {
1423 size = strtonum("0x" $6)
1424 align = strtonum("0x" $NF)
1426 stub@<:@$2@:>@ = size == align * 2
1429 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1430 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1431 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1433 '], [libc_cv_ctors_header=no])
1435 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1438 if test $libc_cv_ctors_header = no; then
1439 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1442 AC_CACHE_CHECK(for libunwind-support in compiler,
1443 libc_cv_cc_with_libunwind, [
1444 cat > conftest.c <<EOF
1445 int main (void) { return 0; }
1447 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1448 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1449 libc_cv_cc_with_libunwind=yes
1451 libc_cv_cc_with_libunwind=no
1454 AC_SUBST(libc_cv_cc_with_libunwind)
1455 if test $libc_cv_cc_with_libunwind = yes; then
1456 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1459 AC_CACHE_CHECK(for -z nodelete option,
1460 libc_cv_z_nodelete, [dnl
1461 cat > conftest.c <<EOF
1462 int _start (void) { return 42; }
1464 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1465 -fPIC -shared -o conftest.so conftest.c
1466 -nostartfiles -nostdlib
1467 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1469 libc_cv_z_nodelete=yes
1471 AC_MSG_ERROR(linker with -z nodelete support required)
1475 AC_CACHE_CHECK(for -z nodlopen option,
1476 libc_cv_z_nodlopen, [dnl
1477 cat > conftest.c <<EOF
1478 int _start (void) { return 42; }
1480 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1481 -fPIC -shared -o conftest.so conftest.c
1482 -nostartfiles -nostdlib
1483 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1485 libc_cv_z_nodlopen=yes
1487 AC_MSG_ERROR(linker with -z nodlopen support required)
1491 AC_CACHE_CHECK(for -z initfirst option,
1492 libc_cv_z_initfirst, [dnl
1493 cat > conftest.c <<EOF
1494 int _start (void) { return 42; }
1496 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1497 -fPIC -shared -o conftest.so conftest.c
1498 -nostartfiles -nostdlib
1499 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1501 libc_cv_z_initfirst=yes
1503 AC_MSG_ERROR(linker with -z initfirst support required)
1507 # Add-on fragments can set these for other machines.
1508 libc_commonpagesize=${libc_commonpagesize:-no}
1509 libc_relro_required=${libc_relro_required:-no}
1510 case "$base_machine" in
1511 i[[34567]]86 | x86_64 | powerpc* | s390*)
1512 libc_commonpagesize=0x1000
1513 libc_relro_required=yes
1516 libc_commonpagesize=0x2000
1517 libc_relro_required=yes
1520 libc_commonpagesize=0x4000
1523 libc_commonpagesize=0x10000
1524 libc_relro_required=yes
1528 if test $libc_commonpagesize != no; then
1529 AC_CACHE_CHECK(for -z relro option,
1530 libc_cv_z_relro, [dnl
1532 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1533 int _start (void) { return 42; }
1534 extern void _exit (int);
1535 /* Since these pointers are const, they should go in rodata.
1536 Since they refer to functions that have to be resolved by
1537 dynamic linking, they should instead go in RELRO data. */
1538 const void *const relro[] = { &_start, &_exit, 0 };
1539 /* GNU ld fails to produce RELRO data when it's very small and there is no
1540 normal writable data following it, or if only uninitialized (.bss) data
1541 follows it, or only very small writable data. */
1542 int data[0x10000] = { 1, };
1544 cat > conftest.awk <<\EOF
1547 commonpagesize = strtonum(commonpagesize)
1549 { print "LINE:", $0 > "/dev/stderr" }
1551 vaddr = strtonum($3)
1552 memsz = strtonum($6)
1554 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1555 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1556 result = (end % commonpagesize == 0) ? "yes" : "broken"
1558 END { print result }
1560 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1561 -fPIC -shared -o conftest.so conftest.c
1562 -nostartfiles -nostdlib
1563 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1564 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1566 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1567 conftest.ph > conftest.cps
1569 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1571 if { test "x$libc_relro_required" = xyes &&
1572 test "x$libc_cv_z_relro" != xyes
1575 AC_MSG_ERROR(linker with -z relro support required)
1578 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1581 AC_CACHE_CHECK(for -Bgroup option,
1582 libc_cv_Bgroup, [dnl
1583 cat > conftest.c <<EOF
1584 int _start (void) { return 42; }
1586 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1587 -fPIC -shared -o conftest.so conftest.c
1588 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1595 AC_SUBST(libc_cv_Bgroup)
1597 AC_CACHE_CHECK(for libgcc_s suffix,
1598 libc_cv_libgcc_s_suffix, [dnl
1599 cat > conftest.c <<EOF
1600 int main (void) { return 0; }
1603 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1604 -fPIC -shared -shared-libgcc -o conftest.so \
1605 conftest.c -v 2>&1 >/dev/null \
1606 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1609 AC_SUBST(libc_cv_libgcc_s_suffix)
1611 AC_CACHE_CHECK(for --as-needed option,
1612 libc_cv_as_needed, [dnl
1613 cat > conftest.c <<EOF
1614 int main (void) { return 0; }
1616 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1617 -fPIC -shared -o conftest.so conftest.c
1618 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1619 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1621 libc_cv_as_needed=yes
1623 libc_cv_as_needed=no
1626 AC_SUBST(libc_cv_as_needed)
1629 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1630 libc_cv_as_noexecstack, [dnl
1631 cat > conftest.c <<EOF
1634 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1635 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1636 && grep -q .note.GNU-stack conftest.s \
1637 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1638 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1640 libc_cv_as_noexecstack=yes
1642 libc_cv_as_noexecstack=no
1645 if test $libc_cv_as_noexecstack = yes; then
1646 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1648 AC_SUBST(ASFLAGS_config)
1650 AC_CACHE_CHECK(for -z combreloc,
1651 libc_cv_z_combreloc, [dnl
1652 cat > conftest.c <<EOF
1653 extern int bar (int);
1655 int foo (void) { return bar (mumble); }
1657 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1658 -fPIC -shared -o conftest.so conftest.c
1659 -nostdlib -nostartfiles
1660 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1662 dnl The following test is a bit weak. We must use a tool which can test
1663 dnl cross-platform since the gcc used can be a cross compiler. Without
1664 dnl introducing new options this is not easily doable. Instead use a tool
1665 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1666 dnl look for a section named .rel.dyn.
1667 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1668 libc_cv_z_combreloc=yes
1670 libc_cv_z_combreloc=no
1673 libc_cv_z_combreloc=no
1676 if test "$libc_cv_z_combreloc" = yes; then
1677 AC_DEFINE(HAVE_Z_COMBRELOC)
1679 AC_SUBST(libc_cv_z_combreloc)
1681 AC_CACHE_CHECK(for -z execstack,
1682 libc_cv_z_execstack, [dnl
1683 cat > conftest.c <<EOF
1684 int _start (void) { return 42; }
1686 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1687 -fPIC -shared -o conftest.so conftest.c
1688 -Wl,-z,execstack -nostdlib
1689 1>&AS_MESSAGE_LOG_FD])
1691 libc_cv_z_execstack=yes
1693 libc_cv_z_execstack=no
1696 AC_SUBST(libc_cv_z_execstack)
1698 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1699 cat > conftest.c <<EOF
1701 main () { return 0;}
1703 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1704 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1712 AC_SUBST(libc_cv_fpie)
1714 AC_CACHE_CHECK(for --hash-style option,
1715 libc_cv_hashstyle, [dnl
1716 cat > conftest.c <<EOF
1717 int _start (void) { return 42; }
1719 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1720 -fPIC -shared -o conftest.so conftest.c
1721 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1723 libc_cv_hashstyle=yes
1725 libc_cv_hashstyle=no
1728 AC_SUBST(libc_cv_hashstyle)
1730 # The linker's default -shared behavior is good enough if it
1731 # does these things that our custom linker scripts ensure that
1732 # all allocated NOTE sections come first.
1733 if test "$use_default_link" = default; then
1734 AC_CACHE_CHECK([for sufficient default -shared layout],
1735 libc_cv_use_default_link, [dnl
1736 libc_cv_use_default_link=no
1737 cat > conftest.s <<\EOF
1738 .section .note.a,"a",%note
1743 .section .note.b,"a",%note
1749 if AC_TRY_COMMAND([dnl
1750 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1751 ac_try=`$READELF -S conftest.so | sed -n \
1753 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1759 libc_seen_a=no libc_seen_b=no
1761 while test $# -ge 2 -a "$1" = NOTE; do
1763 .note.a) libc_seen_a=yes ;;
1764 .note.b) libc_seen_b=yes ;;
1768 case "$libc_seen_a$libc_seen_b" in
1770 libc_cv_use_default_link=yes
1773 echo >&AS_MESSAGE_LOG_FD "\
1774 $libc_seen_a$libc_seen_b from:
1780 use_default_link=$libc_cv_use_default_link
1783 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1784 if libc_cv_output_format=`
1785 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1789 libc_cv_output_format=
1791 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1792 AC_SUBST(libc_cv_output_format)
1794 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1795 cat > conftest.c <<EOF
1798 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1799 conftest.c 1>&AS_MESSAGE_LOG_FD])
1801 libc_cv_fno_toplevel_reorder=yes
1803 libc_cv_fno_toplevel_reorder=no
1806 if test $libc_cv_fno_toplevel_reorder = yes; then
1807 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1809 fno_unit_at_a_time=-fno-unit-at-a-time
1811 AC_SUBST(fno_unit_at_a_time)
1813 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1814 cat > conftest.c <<EOF
1816 main () { return 0;}
1818 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
1819 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1826 AC_SUBST(libc_cv_ssp)
1828 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1829 cat > conftest.c <<EOF
1831 #ifdef __GNUC_GNU_INLINE__
1832 main () { return 0;}
1837 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1838 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1840 libc_cv_gnu89_inline=yes
1842 libc_cv_gnu89_inline=no
1845 if test $libc_cv_gnu89_inline = yes; then
1846 gnu89_inline=-fgnu89-inline
1850 AC_SUBST(gnu89_inline)
1852 AC_CACHE_CHECK(whether cc puts quotes around section names,
1853 libc_cv_have_section_quotes,
1854 [cat > conftest.c <<EOF
1855 static const int foo
1856 __attribute__ ((section ("bar"))) = 1;
1858 if ${CC-cc} -S conftest.c -o conftest.s; then
1859 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1860 libc_cv_have_section_quotes=yes
1862 libc_cv_have_section_quotes=no
1865 libc_cv_have_section_quotes=unknown
1867 rm -f conftest.{c,s}
1869 if test $libc_cv_have_section_quotes = yes; then
1870 AC_DEFINE(HAVE_SECTION_QUOTES)
1873 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1875 cat > conftest.s <<EOF
1877 ${libc_cv_asm_global_directive} foo
1880 .weak bar; bar = foo
1882 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1883 libc_cv_asm_weak_directive=yes
1885 libc_cv_asm_weak_directive=no
1889 if test $libc_cv_asm_weak_directive = no; then
1890 AC_CACHE_CHECK(for assembler .weakext directive,
1891 libc_cv_asm_weakext_directive,
1893 cat > conftest.s <<EOF
1895 ${libc_cv_asm_global_directive} foo
1899 ${libc_cv_asm_global_directive} baz
1902 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1903 libc_cv_asm_weakext_directive=yes
1905 libc_cv_asm_weakext_directive=no
1911 if test $libc_cv_asm_weak_directive = yes; then
1912 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1913 elif test $libc_cv_asm_weakext_directive = yes; then
1914 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1917 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1919 sparc/sparc64*) cfi_offset=2047;;
1922 cat > conftest.s <<EOF
1924 .type func,%function
1928 .cfi_rel_offset 1, $cfi_offset
1931 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1932 libc_cv_asm_cfi_directives=yes
1934 libc_cv_asm_cfi_directives=no
1937 if test $libc_cv_asm_cfi_directives = yes; then
1938 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1941 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1942 cat > conftest.c <<\EOF
1947 dnl No \ in command here because it ends up inside ''.
1948 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1949 -nostdlib -nostartfiles -Wl,--no-whole-archive
1950 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1951 libc_cv_ld_no_whole_archive=yes
1953 libc_cv_ld_no_whole_archive=no
1956 if test $libc_cv_ld_no_whole_archive = no; then
1957 AC_MSG_ERROR([support for --no-whole-archive is needed])
1960 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1961 cat > conftest.c <<\EOF
1966 dnl No \ in command here because it ends up inside ''.
1967 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1968 -nostdlib -nostartfiles -fexceptions
1969 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1970 libc_cv_gcc_exceptions=yes
1972 libc_cv_gcc_exceptions=no
1975 if test $libc_cv_gcc_exceptions = yes; then
1976 exceptions=-fexceptions
1978 AC_SUBST(exceptions)dnl
1980 if test "$host_cpu" = powerpc ; then
1981 # Check for a bug present in at least versions 2.8.x of GCC
1982 # and versions 1.0.x of EGCS.
1983 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1984 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1985 libc_cv_c_asmcr0_bug='no',
1986 libc_cv_c_asmcr0_bug='yes')])
1987 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1988 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1992 dnl Check whether compiler understands __builtin_expect.
1993 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1994 [cat > conftest.c <<EOF
1995 #line $LINENO "configure"
1998 a = __builtin_expect (a, 10);
1999 return a == 10 ? 0 : 1;
2002 dnl No \ in command here because it ends up inside ''.
2003 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
2004 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
2005 libc_cv_gcc_builtin_expect=yes
2007 libc_cv_gcc_builtin_expect=no
2010 if test "$libc_cv_gcc_builtin_expect" = no; then
2011 AC_MSG_ERROR([support for __builtin_expect needed])
2014 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
2015 cat > conftest.c <<\EOF
2018 __builtin_memset (x, 0, 1000);
2022 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
2024 libc_cv_gcc_builtin_memset=no
2026 libc_cv_gcc_builtin_memset=yes
2029 if test "$libc_cv_gcc_builtin_memset" = yes ; then
2030 AC_DEFINE(HAVE_BUILTIN_MEMSET)
2033 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
2034 cat > conftest.c <<\EOF
2035 extern char *strstr (const char *, const char *) __asm ("my_strstr");
2036 char *foo (const char *a, const char *b)
2038 return __builtin_strstr (a, b);
2042 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
2044 libc_cv_gcc_builtin_redirection=yes
2046 libc_cv_gcc_builtin_redirection=no
2049 if test "$libc_cv_gcc_builtin_redirection" = no; then
2050 AC_MSG_ERROR([support for the symbol redirection needed])
2053 dnl Check whether the compiler supports the __thread keyword.
2054 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
2055 [cat > conftest.c <<\EOF
2056 __thread int a = 42;
2058 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
2059 libc_cv_gcc___thread=yes
2061 libc_cv_gcc___thread=no
2064 if test "$libc_cv_gcc___thread" = no; then
2065 AC_MSG_ERROR([support for the __thread keyword is required])
2068 dnl Check whether the compiler supports the tls_model attribute.
2069 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
2070 cat > conftest.c <<\EOF
2071 extern __thread int a __attribute__((tls_model ("initial-exec")));
2073 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
2074 libc_cv_gcc_tls_model_attr=yes
2076 libc_cv_gcc_tls_model_attr=no
2079 if test "$libc_cv_gcc_tls_model_attr" = no; then
2080 AC_MSG_ERROR([support for the tls_model attribute is required])
2083 if test -n "$submachine"; then
2084 AC_CACHE_CHECK([for compiler option for CPU variant],
2085 libc_cv_cc_submachine, [dnl
2086 libc_cv_cc_submachine=no
2087 for opt in "-march=$submachine" "-mcpu=$submachine"; do
2088 if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
2089 libc_cv_cc_submachine="$opt"
2093 if test "x$libc_cv_cc_submachine" = xno; then
2094 AC_MSG_ERROR([${CC-cc} does not support $submachine])
2097 AC_SUBST(libc_cv_cc_submachine)
2099 dnl Check whether we have the gd library available.
2100 AC_MSG_CHECKING(for libgd)
2101 if test "$with_gd" != "no"; then
2102 old_CFLAGS="$CFLAGS"
2103 CFLAGS="$CFLAGS $libgd_include"
2104 old_LDFLAGS="$LDFLAGS"
2105 LDFLAGS="$LDFLAGS $libgd_ldflags"
2107 LIBS="$LIBS -lgd -lpng -lz -lm"
2108 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
2109 CFLAGS="$old_CFLAGS"
2110 LDFLAGS="$old_LDFLAGS"
2115 AC_MSG_RESULT($LIBGD)
2119 if test x$with_selinux = xno ; then
2122 # See if we have the SELinux library
2123 AC_CHECK_LIB(selinux, is_selinux_enabled,
2124 have_selinux=yes, have_selinux=no)
2125 # See if we have the SELinux header with the NSCD permissions in it.
2126 if test x$have_selinux = xyes ; then
2127 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
2128 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
2129 [#ifdef NSCD__SHMEMHOST
2132 #error NSCD__SHMEMHOST not defined
2134 have_selinux=yes, have_selinux=no)
2135 AC_MSG_RESULT($have_selinux)
2138 if test x$with_selinux = xyes ; then
2139 if test x$have_selinux = xno ; then
2140 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
2144 # Check if we're building with SELinux support.
2145 if test "x$have_selinux" = xyes; then
2146 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2148 # See if we have the libaudit library
2149 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2150 have_libaudit=yes, have_libaudit=no)
2151 if test "x$have_libaudit" = xyes; then
2152 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2154 AC_SUBST(have_libaudit)
2156 # See if we have the libcap library
2157 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2158 if test "x$have_libcap" = xyes; then
2159 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2161 AC_SUBST(have_libcap)
2163 AC_SUBST(have_selinux)
2165 dnl check for the size of 'long double'.
2166 AC_CHECK_SIZEOF(long double, 0)
2167 sizeof_long_double=$ac_cv_sizeof_long_double
2168 AC_SUBST(sizeof_long_double)
2170 ### End of automated tests.
2171 ### Now run sysdeps configure fragments.
2173 # They also can set these variables.
2175 ldd_rewrite_script=no
2176 libc_cv_sysconfdir=$sysconfdir
2177 libc_cv_gcc_unwind_find_fde=no
2180 # Iterate over all the sysdep directories we will use, running their
2181 # configure fragments.
2182 for dir in $sysnames; do
2185 *) dest=$srcdir/$dir ;;
2187 if test -r $dest/configure; then
2188 AC_MSG_RESULT(running configure fragment for $dir)
2193 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2194 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2196 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2198 # Test for old glibc 2.0.x headers so that they can be removed properly
2199 # Search only in includedir.
2200 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2201 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2203 old_glibc_headers=yes
2205 old_glibc_headers=no
2207 AC_MSG_RESULT($old_glibc_headers)
2208 if test ${old_glibc_headers} = yes; then
2209 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2210 AC_MSG_WARN(*** be removed.)
2212 AC_SUBST(old_glibc_headers)
2214 AC_SUBST(libc_cv_slibdir)
2215 AC_SUBST(libc_cv_localedir)
2216 AC_SUBST(libc_cv_sysconfdir)
2217 AC_SUBST(libc_cv_rootsbindir)
2218 AC_SUBST(libc_cv_forced_unwind)
2220 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2221 AC_SUBST(libc_cv_cpp_asm_debuginfo)
2222 AC_SUBST(libc_cv_cc_sse4)
2223 AC_SUBST(libc_cv_cc_avx)
2224 AC_SUBST(libc_cv_cc_novzeroupper)
2225 AC_SUBST(libc_cv_cc_fma4)
2226 AC_SUBST(libc_cv_as_i686)
2228 AC_SUBST(use_ldconfig)
2229 AC_SUBST(ldd_rewrite_script)
2234 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2235 [libc_cv_pic_default=yes
2236 cat > conftest.c <<EOF
2237 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2238 # error PIC is default.
2241 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2242 libc_cv_pic_default=no
2245 AC_SUBST(libc_cv_pic_default)
2249 AC_SUBST(static_nss)
2250 AC_SUBST(nopic_initfini)
2254 dnl See sysdeps/mach/configure.in for this variable.
2255 AC_SUBST(mach_interface_list)
2257 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2260 config_makefile=Makefile
2263 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2264 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2268 AC_CONFIG_FILES([config.make ${config_makefile}])
2269 AC_CONFIG_COMMANDS([default],[[
2270 case $CONFIG_FILES in *config.make*)
2271 echo "$config_vars" >> config.make;;
2273 test -d bits || mkdir bits]],[[config_vars='$config_vars']])