1 dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required.
4 AC_INIT([GNU C Library], [(see version.h)], [glibc])
5 AC_CONFIG_SRCDIR([include/features.h])
6 AC_CONFIG_HEADERS([config.h])
7 AC_CONFIG_AUX_DIR([scripts])
9 dnl This is here so we can set $subdirs directly based on configure fragments.
15 if test $host != $build; then
16 AC_CHECK_PROGS(BUILD_CC, gcc cc)
18 AC_SUBST(cross_compiling)
20 # We need the C++ compiler only for testing.
23 if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
24 AC_MSG_ERROR([you must configure in a separate build directory])
27 # This will get text that should go into config.make.
30 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
32 AC_HELP_STRING([--with-gd=DIR],
33 [find libgd include dir and library with prefix DIR]),
37 *) libgd_include="-I$withval/include"
38 libgd_ldflags="-L$withval/lib" ;;
41 AC_ARG_WITH([gd-include],
42 AC_HELP_STRING([--with-gd-include=DIR],
43 [find libgd include files in DIR]),
45 case "$with_gd_include" in
47 *) libgd_include="-I$withval" ;;
51 AC_HELP_STRING([--with-gd-lib=DIR],
52 [find libgd library files in DIR]),
54 case "$with_gd_lib" in
56 *) libgd_ldflags="-L$withval" ;;
60 if test -n "$libgd_include"; then
61 config_vars="$config_vars
62 CFLAGS-memusagestat.c = $libgd_include"
64 if test -n "$libgd_ldflags"; then
65 config_vars="$config_vars
66 libgd-LDFLAGS = $libgd_ldflags"
69 dnl Arguments to specify presence of other packages/features.
71 AC_HELP_STRING([--with-fp],
72 [if using floating-point hardware @<:@default=yes@:>@]),
76 AC_ARG_WITH([binutils],
77 AC_HELP_STRING([--with-binutils=PATH],
78 [specify location of binutils (as and ld)]),
79 [path_binutils=$withval],
82 AC_HELP_STRING([--with-elf],
83 [if using the ELF object format]),
86 AC_ARG_WITH([selinux],
87 AC_HELP_STRING([--with-selinux],
88 [if building with SELinux support]),
89 [with_selinux=$withval],
92 AC_HELP_STRING([--with-xcoff],
93 [if using the XCOFF object format]),
97 AC_HELP_STRING([--without-cvs],
98 [if CVS should not be used]),
101 if test "$with_cvs" = yes; then
102 if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
109 AC_ARG_WITH([headers],
110 AC_HELP_STRING([--with-headers=PATH],
111 [location of system headers to use
112 (for example /usr/src/linux/include)
113 @<:@default=compiler default@:>@]),
114 [sysheaders=$withval],
117 AC_ARG_ENABLE([sanity-checks],
118 AC_HELP_STRING([--disable-sanity-checks],
119 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
120 [enable_sanity=$enableval],
123 AC_SUBST(enable_check_abi)
124 AC_ARG_ENABLE([check-abi],
125 AC_HELP_STRING([--enable-check-abi],
126 [do "make check-abi" in "make check" (no/warn/yes)
127 @<:@default=no@:>@]),
128 [enable_check_abi=$enableval],
129 [enable_check_abi=no])
131 dnl Arguments to enable or disable building the static, shared, profiled,
132 dnl and -fomit-frame-pointer libraries.
133 dnl I've disabled this for now since we cannot build glibc without static
134 dnl libraries built in the moment.
135 dnl AC_ARG_ENABLE([static],
136 dnl AC_HELP_STRING([--enable-static],
137 dnl [build static library @<:@default=yes@:>@]),
138 dnl [static=$enableval],
141 AC_ARG_ENABLE([shared],
142 AC_HELP_STRING([--enable-shared],
143 [build shared library @<:@default=yes if GNU ld & ELF@:>@]),
146 AC_ARG_ENABLE([profile],
147 AC_HELP_STRING([--enable-profile],
148 [build profiled library @<:@default=no@:>@]),
149 [profile=$enableval],
151 AC_ARG_ENABLE([omitfp],
152 AC_HELP_STRING([--enable-omitfp],
153 [build undebuggable optimized library @<:@default=no@:>@]),
156 AC_ARG_ENABLE([bounded],
157 AC_HELP_STRING([--enable-bounded],
158 [build with runtime bounds checking @<:@default=no@:>@]),
159 [bounded=$enableval],
161 AC_ARG_ENABLE([versioning],
162 AC_HELP_STRING([--disable-versioning],
163 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
164 [enable_versioning=$enableval],
165 [enable_versioning=yes])
167 AC_ARG_ENABLE([oldest-abi],
168 AC_HELP_STRING([--enable-oldest-abi=ABI],
169 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
170 [oldest_abi=$enableval],
172 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
175 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
179 AC_ARG_ENABLE([stackguard-randomization],
180 AC_HELP_STRING([--enable-stackguard-randomization],
181 [initialize __stack_chk_guard canary with a random number at program start]),
182 [enable_stackguard_randomize=$enableval],
183 [enable_stackguard_randomize=no])
184 if test "$enable_stackguard_randomize" = yes; then
185 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
188 dnl Generic infrastructure for drop-in additions to libc.
189 AC_ARG_ENABLE([add-ons],
190 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
191 [configure and build add-ons in DIR1,DIR2,...
192 search for add-ons if no parameter given]),
193 , [enable_add_ons=yes])
195 dnl Let the user avoid using TLS. Don't know why but...
197 AC_HELP_STRING([--with-tls],
198 [enable support for TLS]),
202 AC_ARG_WITH([__thread],
203 AC_HELP_STRING([--without-__thread],
204 [do not use TLS features even when supporting them]),
205 [use__thread=$withval],
208 AC_ARG_ENABLE([hidden-plt],
209 AC_HELP_STRING([--disable-hidden-plt],
210 [do not hide internal function calls to avoid PLT]),
213 if test "x$hidden" = xno; then
217 AC_ARG_ENABLE([bind-now],
218 AC_HELP_STRING([--enable-bind-now],
219 [disable lazy relocations in DSOs]),
220 [bindnow=$enableval],
224 dnl On some platforms we cannot use dynamic loading. We must provide
225 dnl static NSS modules.
226 AC_ARG_ENABLE([static-nss],
227 AC_HELP_STRING([--enable-static-nss],
228 [build static NSS modules @<:@default=no@:>@]),
229 [static_nss=$enableval],
231 dnl Enable static NSS also if we build no shared objects.
232 if test x"$static_nss" = xyes || test x"$shared" = xno; then
234 AC_DEFINE(DO_STATIC_NSS)
237 AC_ARG_ENABLE([force-install],
238 AC_HELP_STRING([--disable-force-install],
239 [don't force installation of files from this package, even if they are older than the installed files]),
240 [force_install=$enableval],
242 AC_SUBST(force_install)
244 dnl On some platforms we allow dropping compatibility with all kernel
246 AC_ARG_ENABLE([kernel],
247 AC_HELP_STRING([--enable-kernel=VERSION],
248 [compile for compatibility with kernel not older than VERSION]),
249 [minimum_kernel=$enableval],
251 dnl Prevent unreasonable values.
252 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
253 # Better nothing than this.
256 if test "$minimum_kernel" = current; then
257 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
261 dnl For the development we sometimes want gcc to issue even more warnings.
262 dnl This is not the default since many of the extra warnings are not
264 AC_ARG_ENABLE([all-warnings],
265 AC_HELP_STRING([--enable-all-warnings],
266 [enable all useful warnings gcc can issue]),
267 [all_warnings=$enableval],
269 AC_SUBST(all_warnings)
271 AC_ARG_ENABLE([multi-arch],
272 AC_HELP_STRING([--enable-multi-arch],
273 [enable single DSO with optimizations for multiple architectures]),
274 [multi_arch=$enableval],
275 [multi_arch=default])
277 AC_ARG_ENABLE([experimental-malloc],
278 AC_HELP_STRING([--enable-experimental-malloc],
279 [enable experimental malloc features]),
280 [experimental_malloc=$enableval],
282 AC_SUBST(experimental_malloc)
284 AC_ARG_ENABLE([nss-crypt],
285 AC_HELP_STRING([--enable-nss-crypt],
286 [enable libcrypt to use nss]),
287 [nss_crypt=$enableval],
289 if test x$nss_crypt = xyes; then
290 nss_includes=-I$(nss-config --includedir 2>/dev/null)
291 if test $? -ne 0; then
292 AC_MSG_ERROR([cannot find include directory with nss-config])
295 CFLAGS="$CFLAGS $nss_includes"
296 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
298 #include <nsslowhash.h>
299 void f (void) { NSSLOW_Init (); }])],
300 libc_cv_nss_crypt=yes,
302 cannot find NSS headers with lowlevel hash function interfaces]))
304 LIBS="$LIBS -lfreebl3"
305 AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
307 #include <nsslowhash.h>],
309 libc_cv_nss_crypt=yes,
311 cannot link program using lowlevel NSS hash functions]))
317 AC_SUBST(libc_cv_nss_crypt)
319 # The way shlib-versions is used to generate soversions.mk uses a
320 # fairly simplistic model for name recognition that can't distinguish
321 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
322 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
323 # tell. This doesn't get used much beyond that, so it's fairly safe.
328 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
332 # We keep the original values in `$config_*' and never modify them, so we
333 # can write them unchanged into config.make. Everything else uses
334 # $machine, $vendor, and $os, and changes them whenever convenient.
335 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
337 # Don't allow vendor == "unknown"
338 test "$config_vendor" = unknown && config_vendor=
339 config_os="`echo $config_os | sed 's/^unknown-//'`"
341 # Some configurations imply other options.
343 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
344 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
346 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
347 # These systems (almost) always use the ELF format.
351 # These systems are always xcoff
357 # The configure fragment of an add-on port can modify these to supplement
358 # or override the table in the case statement below. No fragment should
359 # ever change the config_* variables, however.
360 machine=$config_machine
361 vendor=$config_vendor
365 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
367 if test "$machine" = rs6000; then
371 # Braindead PowerPC box with absolutely no FPU.
372 case "$machine-$host_os" in
380 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
383 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
385 *) submachine="$withval" ;;
389 # An add-on can set this when it wants to disable the sanity check below.
392 dnl Having this here, though empty, makes sure that if add-ons' fragments
393 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
394 dnl our AC_OUTPUT will actually use it.
397 case "$enable_add_ons" in
400 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
401 sed 's@/[[^/]]*$@@' | sort | uniq`
402 add_ons_automatic=yes
404 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
405 add_ons_automatic=no ;;
411 if test x"$add_ons" != x; then
412 for f in $add_ons; do
417 *** It seems that you're using an old \`crypt' add-on. crypt is now
418 *** part of glibc and using the old add-on will not work with this
419 *** release. Start again with fresh sources and without the old
420 *** \`crypt' add-on.])
424 *** It seems that you're using an old \`localedata' add-on. localedata
425 *** is now part of glibc and using the old add-on will not work with
426 *** this release. Start again with fresh sources and without the old
427 *** \`localedata' add-on.])
432 # Now source each add-on's configure fragment.
433 # The fragments can use $srcdir/$libc_add_on to find themselves,
434 # and test $add_ons_automatic to see if they were explicitly requested.
435 # A fragment can clear (or even change) $libc_add_on to affect
436 # whether it goes into the list to be actually used in the build.
438 for libc_add_on in $add_ons; do
439 # Test whether such a directory really exists.
440 # It can be absolute, or relative to $srcdir, or relative to the build dir.
441 case "$libc_add_on" in
443 libc_add_on_srcdir=$libc_add_on
446 test -d "$srcdir/$libc_add_on" || {
447 if test -d "$libc_add_on"; then
448 libc_add_on="`pwd`/$libc_add_on"
450 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
453 libc_add_on_srcdir=$srcdir/$libc_add_on
457 libc_add_on_frag=$libc_add_on_srcdir/configure
458 libc_add_on_canonical=
459 libc_add_on_config_subdirs=
460 if test -r "$libc_add_on_frag"; then
461 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
462 libc_add_on_canonical=unknown
464 . "$libc_add_on_frag"
465 test -z "$libc_add_on" || {
466 configured_add_ons="$configured_add_ons $libc_add_on"
467 if test "x$libc_add_on_canonical" = xunknown; then
468 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
470 for d in $libc_add_on_subdirs; do
471 case "$libc_add_on" in
472 /*) subdir_srcdir="$libc_add_on" ;;
473 *) subdir_srcdir="\$(..)$libc_add_on" ;;
477 d="${libc_add_on_canonical:-$libc_add_on}"
483 subdir_srcdir="$subdir_srcdir/$d"
486 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
487 add_on_subdirs="$add_on_subdirs $d"
488 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
489 $d-srcdir = $subdir_srcdir"
491 for d in $libc_add_on_config_subdirs; do
494 fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
496 if test ! -d "$libc_add_on_srcdir/$d"; then
497 AC_MSG_ERROR(fragment wants to configure missing directory $d)
499 case "$libc_add_on" in
501 relative path required for add-on using \$libc_add_on_config_subdirs) ;;
503 subdirs="$subdirs $libc_add_on/$d"
507 if test -n "$libc_add_on"; then
508 if frags=`ls -d $libc_add_on_srcdir/sysdeps/*/preconfigure 2> /dev/null`
510 AC_MSG_CHECKING(add-on $libc_add_on for preconfigure fragments)
511 for frag in $frags; do
512 name=`echo "$frag" | sed 's@/[[^/]]*$@@;s@^.*/@@'`
513 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
518 use_add_ons="$use_add_ons $libc_add_on"
519 add_ons_pfx="$add_ons_pfx $libc_add_on/"
520 test -z "$libc_add_on_canonical" ||
521 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
524 # Use echo to strip excess whitespace.
525 add_ons="`echo $use_add_ons`"
528 AC_SUBST(add_on_subdirs)
532 ### I put this here to prevent those annoying emails from people who cannot
533 ### read and try to compile glibc on unsupported platforms. --drepper
535 ### By using the undocumented --enable-hacker-mode option for configure
536 ### one can skip this test to make the configuration not fail for unsupported
539 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
540 case "$machine-$host_os" in
541 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
544 echo "*** The GNU C library is currently not available for this platform."
545 echo "*** So far nobody cared to port it and if there is no volunteer it"
546 echo "*** might never happen. So, if you have interest to see glibc on"
547 echo "*** this platform visit"
548 echo "*** http://www.gnu.org/software/libc/porting.html"
549 echo "*** and join the group of porters"
555 dnl We need to use [ and ] for other purposes for a while now.
557 # Expand the configuration machine name into a subdirectory by architecture
558 # type and particular chip. If an add-on configure fragment already set
559 # base_machine, we don't change it.
560 test -n "$base_machine" || case "$machine" in
561 a29k | am29000) base_machine=a29k machine=a29k ;;
562 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
563 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
564 i[34567]86) base_machine=i386 machine=i386/$machine ;;
565 ia64) base_machine=ia64 machine=ia64 ;;
566 m88???) base_machine=m88k machine=m88k/$machine ;;
567 m88k) base_machine=m88k machine=m88k/m88100 ;;
568 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
569 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
570 s390) base_machine=s390 machine=s390/s390-32 ;;
571 s390x) base_machine=s390 machine=s390/s390-64 ;;
572 sh3*) base_machine=sh machine=sh/sh3 ;;
573 sh4*) base_machine=sh machine=sh/sh4 ;;
575 base_machine=sparc machine=sparc/sparc32 ;;
576 sparcv8 | supersparc | hypersparc)
577 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
578 sparcv8plus | sparcv8plusa | sparcv9)
579 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
580 sparcv8plusb | sparcv9b)
581 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
583 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
585 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
587 base_machine=sparc machine=sparc/sparc64 ;;
589 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
591 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
593 base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
594 *) base_machine=$machine ;;
597 AC_SUBST(base_machine)
599 if test "$base_machine" = "i386"; then
600 AC_DEFINE(USE_REGPARMS)
603 # For the multi-arch option we need support in the assembler.
604 AC_CACHE_CHECK([for assembler gnu_indirect_function symbol type support],
605 libc_cv_asm_gnu_indirect_function, [dnl
606 cat > conftest.s <<EOF
607 .type foo,%gnu_indirect_function
609 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD;
611 libc_cv_asm_gnu_indirect_function=yes
613 libc_cv_asm_gnu_indirect_function=no
617 AC_MSG_CHECKING(whether .text pseudo-op must be used)
618 AC_CACHE_VAL(libc_cv_dot_text, [dnl
619 cat > conftest.s <<EOF
623 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
624 libc_cv_dot_text=.text
627 if test -z "$libc_cv_dot_text"; then
633 AC_CACHE_CHECK(for assembler global-symbol directive,
634 libc_cv_asm_global_directive, [dnl
635 libc_cv_asm_global_directive=UNKNOWN
636 for ac_globl in .globl .global .EXPORT; do
637 cat > conftest.s <<EOF
642 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
643 libc_cv_asm_global_directive=${ac_globl}
646 test $libc_cv_asm_global_directive != UNKNOWN && break
648 if test $libc_cv_asm_global_directive = UNKNOWN; then
649 AC_MSG_ERROR(cannot determine asm global directive)
651 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
654 AC_CACHE_CHECK(for assembler .type directive prefix,
655 libc_cv_asm_type_prefix, [dnl
656 libc_cv_asm_type_prefix=no
657 for ac_try_prefix in '@' '%' '#'; do
658 cat > conftest.s <<EOF
660 ${libc_cv_asm_global_directive} foo
661 .type foo, ${ac_try_prefix}object
666 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
667 libc_cv_asm_type_prefix=${ac_try_prefix}
670 test "x$libc_cv_asm_type_prefix" != xno && break
672 if test "x$libc_cv_asm_type_prefix" != xno; then
673 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
676 if test x"$libc_cv_asm_gnu_indirect_function" != xyes -a x"$libc_cv_asm_type_prefix" = xno; then
677 if test x"$multi_arch" = xyes; then
678 AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
683 if test x"$multi_arch" != xno; then
684 multi_arch_d=/multiarch
687 # Compute the list of sysdep directories for this configuration.
688 # This can take a while to compute.
689 sysdep_dir=$srcdir/sysdeps
690 AC_MSG_CHECKING(sysdep dirs)
691 dnl We need to use [ and ] for other purposes for a while now.
693 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
694 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
696 test "x$base_os" != x || case "$os" in
699 netbsd* | 386bsd* | freebsd* | bsdi*)
700 base_os=unix/bsd/bsd4.4 ;;
701 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
703 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
706 base_os=unix/sysv/irix6/$os ;;
708 base_os=unix/sysv/sysv4 ;;
710 base_os=unix/sysv/hpux/$os ;;
712 base_os=unix/sysv/aix/aix4.3 ;;
714 base_os=standalone ;;
717 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
720 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
724 o=`echo $tail | sed 's/[0-9]*$//'`
725 if test $o != $tail; then
728 # For linux-gnu, try linux-gnu, then linux.
729 o=`echo $tail | sed 's/-.*$//'`
730 if test $o != $tail; then
734 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
737 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
743 # For sparc/sparc32, try sparc/sparc32 and then sparc.
745 tail=$machine${submachine:+/$submachine}
746 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
748 # Prepend the machine's FPU directory unless --without-fp.
749 if test "$with_fp" = yes; then
752 mach="$mach /$1/nofpu"
758 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
761 # Find what sysdep directories exist.
764 for b in $base ''; do
765 for m0 in $mach ''; do
766 for v in /$vendor ''; do
767 test "$v" = / && continue
768 for o in /$ostry ''; do
769 test "$o" = / && continue
770 for m in $multi_arch_d $mach ''; do
771 for d in $add_ons_pfx ''; do
772 for a in $add_ons_sfx ''; do
773 if test -n "$m0$m0sub$b$v$o$m$msub"; then
774 try_srcdir="${srcdir}/"
778 try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
779 test -n "$enable_debug_configure" &&
780 echo "$0 [DEBUG]: try $try" >&2
781 if test -d "$try_srcdir$try"; then
782 sysnames="$sysnames $try"
783 { test -n "$o" || test -n "$b"; } && os_used=t
784 { test -n "$m" || test -n "$m0"; } && machine_used=t
786 x*/$submachine) submachine_used=t ;;
788 if test -n "$d"; then
789 case "$sysnames_add_ons" in
791 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
804 # If the assembler supports gnu_indirect_function symbol type and the
805 # architecture supports multi-arch, we enable multi-arch by default.
806 case $sysnames_add_ons$sysnames in
810 test x"$multi_arch" = xdefault && multi_arch=no
813 if test x"$multi_arch" != xno; then
814 AC_DEFINE(USE_MULTIARCH)
818 if test -z "$os_used" && test "$os" != none; then
819 AC_MSG_ERROR(Operating system $os is not supported.)
821 if test -z "$machine_used" && test "$machine" != none; then
822 AC_MSG_ERROR(The $machine is not supported.)
824 if test -z "$submachine_used" && test -n "$submachine"; then
825 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
829 # We have now validated the configuration.
832 # If using ELF, look for an `elf' subdirectory of each machine directory.
833 # We prepend these rather than inserting them whereever the machine appears
834 # because things specified by the machine's ELF ABI should override
835 # OS-specific things, and should always be the same for any OS on the
836 # machine (otherwise what's the point of an ABI?).
837 if test "$elf" = yes; then
839 for d in $add_ons_pfx ''; do
841 if test -d $srcdir/${d}sysdeps$m/elf; then
842 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
846 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
850 # Expand the list of system names into a full list of directories
851 # from each element's parent name and Implies file (if present).
854 while test $# -gt 0; do
858 case " $names " in *" $name "*)
859 # Already in the list.
863 # Report each name as we discover it, so there is no long pause in output.
864 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
866 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
870 *) xsrcdir=$srcdir/ ;;
872 test -n "$enable_debug_configure" &&
873 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
875 if test -f $xsrcdir$name/Implies; then
876 # Collect more names from the `Implies' file (removing comments).
877 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
879 for x in $implied_candidate; do
881 if test -d $xsrcdir$name_base/$x; then
882 implied="$implied $name_base/$x";
885 for d in $add_ons_pfx ''; do
889 *) try_srcdir=$srcdir/ ;;
891 test -n "$enable_debug_configure" &&
892 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
893 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
895 implied="$implied $try"
897 case "$sysnames_add_ons" in
899 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
903 if test $found = no; then
904 AC_MSG_WARN($name/Implies specifies nonexistent $x)
911 # Add NAME to the list of names.
914 # Find the parent of NAME, using the empty string if it has none.
916 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
919 # Add the names implied by NAME, and NAME's parent (if it has one), to
920 # the list of names to be processed (the argument list). We prepend the
921 # implied names to the list and append the parent. We want implied
922 # directories to come before further directories inferred from the
923 # configuration components; this ensures that for sysv4, unix/common
924 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
926 sysnames="`echo $implied $* $parent`"
927 test -n "$sysnames" && set $sysnames
930 # Add the default directories.
931 default_sysnames=sysdeps/generic
932 if test "$elf" = yes; then
933 default_sysnames="sysdeps/generic/elf $default_sysnames"
935 sysnames="$names $default_sysnames"
937 # The other names were emitted during the scan.
938 AC_MSG_RESULT($default_sysnames)
940 # Collect the list of add-ons that supply partial sysdeps trees.
942 for add_on in $add_ons; do
945 *) xsrcdir="$srcdir/" ;;
948 test -d "$xsrcdir$add_on/sysdeps" || {
949 case "$configured_add_ons " in
952 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
958 sysdeps_add_ons="$sysdeps_add_ons $add_on"
959 case "$sysnames_add_ons" in
962 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
967 for d in $sysnames; do
969 $add_on/sysdeps/*) ;;
972 (cd "$xsrcdir$d" && for f in *[[!~]]; do
976 test -d "$ff" || { test -e "$ff" && exit 88; }
980 test -d "$f" || { test -e "$f" && exit 88; }
984 if test $? -eq 88; then
989 if test $found = no; then
990 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
993 AC_SUBST(sysdeps_add_ons)
999 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
1000 # The makefiles need to use a different form to find it in $srcdir.
1001 INSTALL='\$(..)./scripts/install-sh -c'
1006 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
1008 # Accept binutils 2.13 or newer.
1009 AC_CHECK_PROG_VER(AS, $AS, --version,
1010 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
1011 [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")
1012 AC_CHECK_PROG_VER(LD, $LD, --version,
1013 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
1014 [2.1[3-9]*|2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
1016 # We need the physical current working directory. We cannot use the
1017 # "pwd -P" shell builtin since that's not portable. Instead we try to
1018 # find a pwd binary. Note that assigning to the PWD environment
1019 # variable might have some interesting side effects, so we don't do
1021 AC_PATH_PROG(PWD_P, pwd, no)
1022 if test "$PWD_P" = no; then
1023 AC_MSG_ERROR(*** A pwd binary could not be found.)
1026 # These programs are version sensitive.
1027 AC_CHECK_TOOL_PREFIX
1028 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
1029 [version \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ],
1030 critic_missing="$critic_missing gcc")
1031 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
1032 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
1033 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
1035 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
1036 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
1037 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
1038 MSGFMT=: aux_missing="$aux_missing msgfmt")
1039 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
1040 [GNU texinfo.* \([0-9][0-9.]*\)],
1042 MAKEINFO=: aux_missing="$aux_missing makeinfo")
1043 AC_CHECK_PROG_VER(SED, sed, --version,
1044 [GNU sed version \([0-9]*\.[0-9.]*\)],
1045 [3.0[2-9]*|3.[1-9]*|[4-9]*],
1046 SED=: aux_missing="$aux_missing sed")
1048 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
1049 case "x$AUTOCONF" in
1050 xno|x|x:) AUTOCONF=no ;;
1053 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
1054 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
1055 libc_cv_autoconf_works=yes
1057 libc_cv_autoconf_works=no
1059 test $libc_cv_autoconf_works = yes || AUTOCONF=no
1062 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
1063 # If --without-cvs they probably won't change configure.in, so no complaints.
1064 aux_missing="$aux_missing autoconf"
1067 test -n "$critic_missing" && AC_MSG_ERROR([
1068 *** These critical programs are missing or too old:$critic_missing
1069 *** Check the INSTALL file for required versions.])
1071 test -n "$aux_missing" && AC_MSG_WARN([
1072 *** These auxiliary programs are missing or incompatible versions:$aux_missing
1073 *** some features will be disabled.
1074 *** Check the INSTALL file for required versions.])
1076 # if using special system headers, find out the compiler's sekrit
1077 # header directory and add that to the list. NOTE: Only does the right
1078 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
1079 if test -n "$sysheaders"; then
1080 SYSINCLUDES=-nostdinc
1081 for d in include include-fixed; do
1082 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
1083 SYSINCLUDES="$SYSINCLUDES -isystem $i"
1085 SYSINCLUDES="$SYSINCLUDES \
1086 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
1087 if test -n "$CXX"; then
1088 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
1089 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
1090 cxxheaders=`$CXX -print-file-name=../../../../include/c++/`"$cxxversion" &&
1091 CXX_SYSINCLUDES="-isystem $cxxheaders \
1092 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
1095 AC_SUBST(SYSINCLUDES)
1096 AC_SUBST(CXX_SYSINCLUDES)
1098 # ranlib is never necessary on Linux and Hurd systems
1101 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1102 # since this would lead to problems installing/building glibc.
1103 # LD_LIBRARY_PATH contains the current directory if one of the following
1105 # - one of the terminals (":" and ";") is the first or last sign
1106 # - two terminals occur directly after each other
1107 # - the path contains an element with a dot in it
1108 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1110 case ${LD_LIBRARY_PATH} in
1111 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1112 ld_library_path_setting="contains current directory"
1115 ld_library_path_setting="ok"
1119 AC_MSG_RESULT($ld_library_path_setting)
1120 if test "$ld_library_path_setting" != "ok"; then
1122 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1123 *** building glibc. Please change the environment variable
1124 *** and run configure again.])
1127 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1128 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
1129 libc_cv_gcc_static_libgcc=
1131 libc_cv_gcc_static_libgcc=-static-libgcc
1133 AC_SUBST(libc_cv_gcc_static_libgcc)
1135 AC_PATH_PROG(BASH_SHELL, bash, no)
1136 if test "$BASH_SHELL" != no &&
1137 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1138 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1139 libc_cv_have_bash2=yes
1141 libc_cv_have_bash2=no
1143 AC_SUBST(libc_cv_have_bash2)
1145 dnl We need a ksh compatible shell for tzselect.
1146 if test "$BASH_SHELL" = no; then
1147 AC_PATH_PROG(KSH, ksh, no)
1148 if test "$KSH" = no; then
1151 libc_cv_have_ksh=yes
1156 libc_cv_have_ksh=yes
1158 AC_SUBST(libc_cv_have_ksh)
1161 AC_PATH_PROG(PERL, perl, no)
1162 if test "$PERL" != no &&
1163 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1166 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1167 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1168 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1170 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
1171 echo '#include <stddef.h>
1172 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
1173 if eval "$ac_cpp conftest.c 2>/dev/null" \
1174 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
1175 libc_cv_signed_size_t=no
1177 libc_cv_signed_size_t=yes
1180 if test $libc_cv_signed_size_t = yes; then
1181 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
1182 cat >> confdefs.h <<\EOF
1183 #undef __SIZE_TYPE__
1184 #define __SIZE_TYPE__ unsigned
1188 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1190 [#define __need_size_t
1191 #define __need_wchar_t
1194 #include <stddef.h>], [size_t size; wchar_t wchar;
1196 #error stddef.h ignored __need_*
1198 if (&size == NULL || &wchar == NULL) abort ();],
1199 libc_cv_friendly_stddef=yes,
1200 libc_cv_friendly_stddef=no)])
1201 if test $libc_cv_friendly_stddef = yes; then
1202 config_vars="$config_vars
1203 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1206 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1207 libc_cv_need_minus_P, [dnl
1208 cat > conftest.S <<EOF
1209 #include "confdefs.h"
1210 /* Nothing whatsoever. */
1212 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1213 libc_cv_need_minus_P=no
1215 libc_cv_need_minus_P=yes
1218 if test $libc_cv_need_minus_P = yes; then
1219 config_vars="$config_vars
1220 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1223 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1224 cat > conftest.s <<EOF
1227 .set glibc_conftest_frobozz,foo
1228 $libc_cv_asm_global_directive glibc_conftest_frobozz
1230 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1231 # (but it doesn't work), so we must do a linking check to be sure.
1232 cat > conftest1.c <<\EOF
1233 extern int glibc_conftest_frobozz;
1234 void _start() { glibc_conftest_frobozz = 1; }
1236 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1237 -nostartfiles -nostdlib \
1238 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1239 libc_cv_asm_set_directive=yes
1241 libc_cv_asm_set_directive=no
1244 if test $libc_cv_asm_set_directive = yes; then
1245 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1248 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1249 libc_cv_asm_unique_object, [dnl
1250 cat > conftest.s <<EOF
1253 .type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
1255 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1256 libc_cv_asm_unique_object=yes
1258 libc_cv_asm_unique_object=no
1261 if test $libc_cv_asm_unique_object = yes; then
1262 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1265 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1266 [cat > conftest.s <<EOF
1269 .symver _sym,sym@VERS
1271 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1272 libc_cv_asm_symver_directive=yes
1274 libc_cv_asm_symver_directive=no
1277 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1278 if test $libc_cv_asm_symver_directive = yes; then
1279 cat > conftest.s <<EOF
1282 .symver _sym,sym@VERS
1284 cat > conftest.map <<EOF
1293 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1294 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1295 -o conftest.so conftest.o
1296 -nostartfiles -nostdlib
1297 -Wl,--version-script,conftest.map
1298 1>&AS_MESSAGE_LOG_FD]);
1300 libc_cv_ld_version_script_option=yes
1302 libc_cv_ld_version_script_option=no
1305 libc_cv_ld_version_script_option=no
1308 libc_cv_ld_version_script_option=no
1311 if test $shared != no &&
1312 test $libc_cv_asm_symver_directive = yes &&
1313 test $libc_cv_ld_version_script_option = yes &&
1314 test $enable_versioning = yes; then
1316 AC_DEFINE(DO_VERSIONING)
1320 AC_SUBST(VERSIONING)
1322 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1324 *** WARNING: You should not compile GNU libc without versioning. Not using
1325 *** versioning will introduce incompatibilities so that old binaries
1326 *** will not run anymore.
1327 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1329 if test $elf = yes; then
1330 AC_CACHE_CHECK(for .previous assembler directive,
1331 libc_cv_asm_previous_directive, [dnl
1332 cat > conftest.s <<EOF
1333 .section foo_section
1336 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1337 libc_cv_asm_previous_directive=yes
1339 libc_cv_asm_previous_directive=no
1342 if test $libc_cv_asm_previous_directive = yes; then
1343 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1345 AC_CACHE_CHECK(for .popsection assembler directive,
1346 libc_cv_asm_popsection_directive, [dnl
1347 cat > conftest.s <<EOF
1348 .pushsection foo_section
1351 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1352 libc_cv_asm_popsection_directive=yes
1354 libc_cv_asm_popsection_directive=no
1357 if test $libc_cv_asm_popsection_directive = yes; then
1358 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1361 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1362 libc_cv_asm_protected_directive, [dnl
1363 cat > conftest.s <<EOF
1369 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1370 libc_cv_asm_protected_directive=yes
1372 AC_MSG_ERROR(assembler support for symbol visibility is required)
1376 if test $libc_cv_asm_protected_directive = yes; then
1377 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1378 libc_cv_visibility_attribute,
1379 [cat > conftest.c <<EOF
1380 int foo __attribute__ ((visibility ("hidden"))) = 1;
1381 int bar __attribute__ ((visibility ("protected"))) = 1;
1383 libc_cv_visibility_attribute=no
1384 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1385 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1386 if grep '\.protected.*bar' conftest.s >/dev/null; then
1387 libc_cv_visibility_attribute=yes
1391 rm -f conftest.{c,s}
1393 if test $libc_cv_visibility_attribute != yes; then
1394 AC_MSG_ERROR(compiler support for visibility attribute is required)
1398 if test $libc_cv_visibility_attribute = yes; then
1399 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1400 libc_cv_broken_visibility_attribute,
1401 [cat > conftest.c <<EOF
1403 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1404 int bar (int x) { return x; }
1406 libc_cv_broken_visibility_attribute=yes
1407 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1409 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1411 libc_cv_broken_visibility_attribute=no
1414 rm -f conftest.c conftest.s
1416 if test $libc_cv_broken_visibility_attribute = yes; then
1417 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1421 AC_CACHE_CHECK(for broken __attribute__((alias())),
1422 libc_cv_broken_alias_attribute,
1423 [cat > conftest.c <<EOF
1424 extern int foo (int x) __asm ("xyzzy");
1425 int bar (int x) { return x; }
1426 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1428 extern __typeof (dfoo) dfoo __asm ("abccb");
1431 libc_cv_broken_alias_attribute=yes
1432 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1433 if grep 'xyzzy' conftest.s >/dev/null &&
1434 grep 'abccb' conftest.s >/dev/null; then
1435 libc_cv_broken_alias_attribute=no
1438 rm -f conftest.c conftest.s
1440 if test $libc_cv_broken_alias_attribute = yes; then
1441 AC_MSG_ERROR(working alias attribute support required)
1444 if test $libc_cv_visibility_attribute = yes; then
1445 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1446 libc_cv_have_sdata_section,
1447 [echo "int i;" > conftest.c
1448 libc_cv_have_sdata_section=no
1449 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1450 | grep '\.sdata' >/dev/null; then
1451 libc_cv_have_sdata_section=yes
1453 rm -f conftest.c conftest.so
1455 if test $libc_cv_have_sdata_section = yes; then
1456 AC_DEFINE(HAVE_SDATA_SECTION)
1460 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1461 libc_cv_initfini_array, [dnl
1462 cat > conftest.c <<EOF
1463 int _start (void) { return 0; }
1464 int __start (void) { return 0; }
1465 int foo (void) { return 1; }
1466 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1468 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1469 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1471 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1472 libc_cv_initfini_array=yes
1474 libc_cv_initfini_array=no
1477 libc_cv_initfini_array=no
1480 if test $libc_cv_initfini_array != yes; then
1481 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1484 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1485 libc_cv_ctors_header, [dnl
1486 if AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep SORT_BY_INIT_PRIORITY 1>&AS_MESSAGE_LOG_FD]); then
1487 libc_cv_ctors_header=no
1489 libc_cv_ctors_header=yes
1492 if test $libc_cv_ctors_header = no; then
1493 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1496 AC_CACHE_CHECK(for libunwind-support in compiler,
1497 libc_cv_cc_with_libunwind, [
1498 cat > conftest.c <<EOF
1499 int main (void) { return 0; }
1501 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1502 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1503 libc_cv_cc_with_libunwind=yes
1505 libc_cv_cc_with_libunwind=no
1508 AC_SUBST(libc_cv_cc_with_libunwind)
1509 if test $libc_cv_cc_with_libunwind = yes; then
1510 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1513 AC_CACHE_CHECK(for -z nodelete option,
1514 libc_cv_z_nodelete, [dnl
1515 cat > conftest.c <<EOF
1516 int _start (void) { return 42; }
1518 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1519 -fPIC -shared -o conftest.so conftest.c
1520 -nostartfiles -nostdlib
1521 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1523 libc_cv_z_nodelete=yes
1525 AC_MSG_ERROR(linker with -z nodelete support required)
1529 AC_CACHE_CHECK(for -z nodlopen option,
1530 libc_cv_z_nodlopen, [dnl
1531 cat > conftest.c <<EOF
1532 int _start (void) { return 42; }
1534 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1535 -fPIC -shared -o conftest.so conftest.c
1536 -nostartfiles -nostdlib
1537 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1539 libc_cv_z_nodlopen=yes
1541 AC_MSG_ERROR(linker with -z nodlopen support required)
1545 AC_CACHE_CHECK(for -z initfirst option,
1546 libc_cv_z_initfirst, [dnl
1547 cat > conftest.c <<EOF
1548 int _start (void) { return 42; }
1550 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1551 -fPIC -shared -o conftest.so conftest.c
1552 -nostartfiles -nostdlib
1553 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1555 libc_cv_z_initfirst=yes
1557 AC_MSG_ERROR(linker with -z initfirst support required)
1561 case "$base_machine" in
1563 i[34567]86 | x86_64 | powerpc* | s390* | sparc* | alpha*)
1565 AC_CACHE_CHECK(for -z relro option,
1566 libc_cv_z_relro, [dnl
1568 if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
1570 if AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep DATA_SEGMENT_RELRO_END 1>&AS_MESSAGE_LOG_FD])
1575 if test "$libc_cv_z_relro" = no; then
1576 AC_MSG_ERROR(linker with -z relro support required)
1582 AC_CACHE_CHECK(for -Bgroup option,
1583 libc_cv_Bgroup, [dnl
1584 cat > conftest.c <<EOF
1585 int _start (void) { return 42; }
1587 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1588 -fPIC -shared -o conftest.so conftest.c
1589 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1596 AC_SUBST(libc_cv_Bgroup)
1598 AC_CACHE_CHECK(for libgcc_s suffix,
1599 libc_cv_libgcc_s_suffix, [dnl
1600 cat > conftest.c <<EOF
1601 int main (void) { return 0; }
1604 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1605 -fPIC -shared -shared-libgcc -o conftest.so \
1606 conftest.c -v 2>&1 >/dev/null \
1607 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1610 AC_SUBST(libc_cv_libgcc_s_suffix)
1612 AC_CACHE_CHECK(for --as-needed option,
1613 libc_cv_as_needed, [dnl
1614 cat > conftest.c <<EOF
1615 int main (void) { return 0; }
1617 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1618 -fPIC -shared -o conftest.so conftest.c
1619 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1620 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1622 libc_cv_as_needed=yes
1624 libc_cv_as_needed=no
1627 AC_SUBST(libc_cv_as_needed)
1630 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1631 libc_cv_as_noexecstack, [dnl
1632 cat > conftest.c <<EOF
1635 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1636 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1637 && grep -q .note.GNU-stack conftest.s \
1638 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1639 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1641 libc_cv_as_noexecstack=yes
1643 libc_cv_as_noexecstack=no
1646 if test $libc_cv_as_noexecstack = yes; then
1647 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1649 AC_SUBST(ASFLAGS_config)
1651 AC_CACHE_CHECK(for -z combreloc,
1652 libc_cv_z_combreloc, [dnl
1653 cat > conftest.c <<EOF
1654 extern int bar (int);
1656 int foo (void) { return bar (mumble); }
1658 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1659 -fPIC -shared -o conftest.so conftest.c
1660 -nostdlib -nostartfiles
1661 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1663 dnl The following test is a bit weak. We must use a tool which can test
1664 dnl cross-platform since the gcc used can be a cross compiler. Without
1665 dnl introducing new options this is not easily doable. Instead use a tool
1666 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1667 dnl look for a section named .rel.dyn.
1668 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1669 libc_cv_z_combreloc=yes
1671 libc_cv_z_combreloc=no
1674 libc_cv_z_combreloc=no
1677 if test "$libc_cv_z_combreloc" = yes; then
1678 AC_DEFINE(HAVE_Z_COMBRELOC)
1680 AC_SUBST(libc_cv_z_combreloc)
1682 AC_CACHE_CHECK(for -z execstack,
1683 libc_cv_z_execstack, [dnl
1684 cat > conftest.c <<EOF
1685 int _start (void) { return 42; }
1687 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1688 -fPIC -shared -o conftest.so conftest.c
1689 -Wl,-z,execstack -nostdlib
1690 1>&AS_MESSAGE_LOG_FD])
1692 libc_cv_z_execstack=yes
1694 libc_cv_z_execstack=no
1697 AC_SUBST(libc_cv_z_execstack)
1699 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1700 cat > conftest.c <<EOF
1702 main () { return 0;}
1704 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1705 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1713 AC_SUBST(libc_cv_fpie)
1715 AC_CACHE_CHECK(for --hash-style option,
1716 libc_cv_hashstyle, [dnl
1717 cat > conftest.c <<EOF
1718 int _start (void) { return 42; }
1720 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1721 -fPIC -shared -o conftest.so conftest.c
1722 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1724 libc_cv_hashstyle=yes
1726 libc_cv_hashstyle=no
1729 AC_SUBST(libc_cv_hashstyle)
1732 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1733 cat > conftest.c <<EOF
1736 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1737 conftest.c 1>&AS_MESSAGE_LOG_FD])
1739 libc_cv_fno_toplevel_reorder=yes
1741 libc_cv_fno_toplevel_reorder=no
1744 if test $libc_cv_fno_toplevel_reorder = yes; then
1745 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1747 fno_unit_at_a_time=-fno-unit-at-a-time
1749 AC_SUBST(fno_unit_at_a_time)
1751 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1752 cat > conftest.c <<EOF
1754 main () { return 0;}
1756 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
1757 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1764 AC_SUBST(libc_cv_ssp)
1766 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1767 cat > conftest.c <<EOF
1769 #ifdef __GNUC_GNU_INLINE__
1770 main () { return 0;}
1775 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1776 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1778 libc_cv_gnu89_inline=yes
1780 libc_cv_gnu89_inline=no
1783 if test $libc_cv_gnu89_inline = yes; then
1784 gnu89_inline=-fgnu89-inline
1788 AC_SUBST(gnu89_inline)
1790 if test $elf != yes; then
1791 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1792 [AC_TRY_COMPILE(, [asm (".section .init");
1793 asm (".section .fini");
1794 asm ("${libc_cv_dot_text}");],
1795 libc_cv_have_initfini=yes,
1796 libc_cv_have_initfini=no)])
1797 AC_SUBST(libc_cv_have_initfini)dnl
1798 if test $libc_cv_have_initfini = yes; then
1799 AC_DEFINE(HAVE_INITFINI)
1803 if test $elf = yes; then
1804 AC_CACHE_CHECK(whether cc puts quotes around section names,
1805 libc_cv_have_section_quotes,
1806 [cat > conftest.c <<EOF
1807 static const int foo
1808 __attribute__ ((section ("bar"))) = 1;
1810 if ${CC-cc} -S conftest.c -o conftest.s; then
1811 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1812 libc_cv_have_section_quotes=yes
1814 libc_cv_have_section_quotes=no
1817 libc_cv_have_section_quotes=unknown
1819 rm -f conftest.{c,s}
1821 if test $libc_cv_have_section_quotes = yes; then
1822 AC_DEFINE(HAVE_SECTION_QUOTES)
1826 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1827 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1828 [cat > conftest.$ac_ext <<EOF
1829 dnl This sometimes fails to find confdefs.h, for some reason.
1830 dnl [#]line $LINENO "[$]0"
1831 [#]line $LINENO "configure"
1832 #include "confdefs.h"
1833 void underscore_test(void) {
1836 if AC_TRY_EVAL(ac_compile); then
1837 if grep _underscore_test conftest* >/dev/null; then
1838 ifelse([$1], , :, [rm -f conftest*
1841 ifelse([$2], , , [rm -f conftest*
1845 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1846 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1847 ifelse([$2], , , [rm -f conftest*
1852 if test $elf = yes; then
1853 libc_cv_asm_underscores=no
1855 if test $ac_cv_prog_cc_works = yes; then
1856 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1857 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1858 libc_cv_asm_underscores=yes,
1859 libc_cv_asm_underscores=no)])
1861 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1862 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1863 libc_cv_asm_underscores=no)])
1866 if test $libc_cv_asm_underscores = no; then
1867 AC_DEFINE(NO_UNDERSCORES)
1870 if test $elf = yes; then
1871 libc_cv_weak_symbols=yes
1874 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1876 cat > conftest.s <<EOF
1878 ${libc_cv_asm_global_directive} foo
1881 .weak bar; bar = foo
1883 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1884 libc_cv_asm_weak_directive=yes
1886 libc_cv_asm_weak_directive=no
1890 if test $libc_cv_asm_weak_directive = no; then
1891 AC_CACHE_CHECK(for assembler .weakext directive,
1892 libc_cv_asm_weakext_directive,
1894 cat > conftest.s <<EOF
1896 ${libc_cv_asm_global_directive} foo
1900 ${libc_cv_asm_global_directive} baz
1903 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1904 libc_cv_asm_weakext_directive=yes
1906 libc_cv_asm_weakext_directive=no
1912 if test $libc_cv_asm_weak_directive = yes; then
1913 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1914 elif test $libc_cv_asm_weakext_directive = yes; then
1915 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1918 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1920 sparc/sparc64*) cfi_offset=2047;;
1923 cat > conftest.s <<EOF
1925 .type func,%function
1929 .cfi_rel_offset 1, $cfi_offset
1932 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1933 libc_cv_asm_cfi_directives=yes
1935 libc_cv_asm_cfi_directives=no
1938 if test $libc_cv_asm_cfi_directives = yes; then
1939 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1942 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1943 cat > conftest.c <<\EOF
1948 dnl No \ in command here because it ends up inside ''.
1949 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1950 -nostdlib -nostartfiles -Wl,--no-whole-archive
1951 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1952 libc_cv_ld_no_whole_archive=yes
1954 libc_cv_ld_no_whole_archive=no
1957 if test $libc_cv_ld_no_whole_archive = yes; then
1958 no_whole_archive=-Wl,--no-whole-archive
1960 AC_SUBST(no_whole_archive)dnl
1962 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1963 cat > conftest.c <<\EOF
1968 dnl No \ in command here because it ends up inside ''.
1969 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1970 -nostdlib -nostartfiles -fexceptions
1971 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1972 libc_cv_gcc_exceptions=yes
1974 libc_cv_gcc_exceptions=no
1977 if test $libc_cv_gcc_exceptions = yes; then
1978 exceptions=-fexceptions
1980 AC_SUBST(exceptions)dnl
1982 if test "$host_cpu" = powerpc ; then
1983 # Check for a bug present in at least versions 2.8.x of GCC
1984 # and versions 1.0.x of EGCS.
1985 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1986 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1987 libc_cv_c_asmcr0_bug='no',
1988 libc_cv_c_asmcr0_bug='yes')])
1989 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1990 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1994 dnl Check whether compiler understands __builtin_expect.
1995 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1996 [cat > conftest.c <<EOF
1997 #line $LINENO "configure"
2000 a = __builtin_expect (a, 10);
2001 return a == 10 ? 0 : 1;
2004 dnl No \ in command here because it ends up inside ''.
2005 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
2006 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
2007 libc_cv_gcc_builtin_expect=yes
2009 libc_cv_gcc_builtin_expect=no
2012 if test "$libc_cv_gcc_builtin_expect" = yes; then
2013 AC_DEFINE(HAVE_BUILTIN_EXPECT)
2016 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
2017 cat > conftest.c <<\EOF
2020 __builtin_memset (x, 0, 1000);
2024 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
2026 libc_cv_gcc_builtin_memset=no
2028 libc_cv_gcc_builtin_memset=yes
2031 if test "$libc_cv_gcc_builtin_memset" = yes ; then
2032 AC_DEFINE(HAVE_BUILTIN_MEMSET)
2035 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
2036 cat > conftest.c <<\EOF
2037 extern char *strstr (const char *, const char *) __asm ("my_strstr");
2038 char *foo (const char *a, const char *b)
2040 return __builtin_strstr (a, b);
2044 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
2046 libc_cv_gcc_builtin_redirection=yes
2048 libc_cv_gcc_builtin_redirection=no
2051 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
2052 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
2055 dnl Check whether the compiler supports the __thread keyword.
2056 if test "x$use__thread" != xno; then
2057 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
2058 [cat > conftest.c <<\EOF
2059 __thread int a = 42;
2061 if AC_TRY_COMMAND([${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" = yes; then
2068 AC_DEFINE(HAVE___THREAD)
2071 libc_cv_gcc___thread=no
2074 if test "$libc_cv_gcc___thread" = yes; then
2075 dnl Check whether the compiler supports the tls_model attribute.
2076 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
2077 cat > conftest.c <<\EOF
2078 extern __thread int a __attribute__((tls_model ("initial-exec")));
2080 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
2081 libc_cv_gcc_tls_model_attr=yes
2083 libc_cv_gcc_tls_model_attr=no
2086 if test "$libc_cv_gcc_tls_model_attr" = yes; then
2087 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
2091 if test -n "$submachine"; then
2092 AC_CACHE_CHECK([for compiler option for CPU variant],
2093 libc_cv_cc_submachine, [dnl
2094 libc_cv_cc_submachine=no
2095 for opt in "-march=$submachine" "-mcpu=$submachine"; do
2096 if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
2097 libc_cv_cc_submachine="$opt"
2101 if test "x$libc_cv_cc_submachine" = xno; then
2102 AC_MSG_ERROR([${CC-cc} does not support $submachine])
2105 AC_SUBST(libc_cv_cc_submachine)
2107 dnl Check whether we have the gd library available.
2108 AC_MSG_CHECKING(for libgd)
2109 if test "$with_gd" != "no"; then
2110 old_CFLAGS="$CFLAGS"
2111 CFLAGS="$CFLAGS $libgd_include"
2112 old_LDFLAGS="$LDFLAGS"
2113 LDFLAGS="$LDFLAGS $libgd_ldflags"
2115 LIBS="$LIBS -lgd -lpng -lz -lm"
2116 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
2117 CFLAGS="$old_CFLAGS"
2118 LDFLAGS="$old_LDFLAGS"
2123 AC_MSG_RESULT($LIBGD)
2127 if test x$with_selinux = xno ; then
2130 # See if we have the SELinux library
2131 AC_CHECK_LIB(selinux, is_selinux_enabled,
2132 have_selinux=yes, have_selinux=no)
2133 # See if we have the SELinux header with the NSCD permissions in it.
2134 if test x$have_selinux = xyes ; then
2135 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
2136 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
2137 [#ifdef NSCD__SHMEMHOST
2140 #error NSCD__SHMEMHOST not defined
2142 have_selinux=yes, have_selinux=no)
2143 AC_MSG_RESULT($have_selinux)
2146 if test x$with_selinux = xyes ; then
2147 if test x$have_selinux = xno ; then
2148 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
2152 # Check if we're building with SELinux support.
2153 if test "x$have_selinux" = xyes; then
2154 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2156 # See if we have the libaudit library
2157 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2158 have_libaudit=yes, have_libaudit=no)
2159 if test "x$have_libaudit" = xyes; then
2160 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2162 AC_SUBST(have_libaudit)
2164 # See if we have the libcap library
2165 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2166 if test "x$have_libcap" = xyes; then
2167 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2169 AC_SUBST(have_libcap)
2171 AC_SUBST(have_selinux)
2173 dnl check for the size of 'long double'.
2174 AC_CHECK_SIZEOF(long double, 0)
2175 sizeof_long_double=$ac_cv_sizeof_long_double
2176 AC_SUBST(sizeof_long_double)
2178 ### End of automated tests.
2179 ### Now run sysdeps configure fragments.
2181 # They also can set these variables.
2183 ldd_rewrite_script=no
2184 libc_cv_sysconfdir=$sysconfdir
2185 libc_cv_gcc_unwind_find_fde=no
2188 # Iterate over all the sysdep directories we will use, running their
2189 # configure fragments.
2190 for dir in $sysnames; do
2193 *) dest=$srcdir/$dir ;;
2195 if test -r $dest/configure; then
2196 AC_MSG_RESULT(running configure fragment for $dir)
2201 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2202 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2204 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2206 dnl This is tested by existing code and it's simpler to avoid changing it.
2207 AC_DEFINE(USE_IN_LIBIO)
2209 # Test for old glibc 2.0.x headers so that they can be removed properly
2210 # Search only in includedir.
2211 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2212 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2214 old_glibc_headers=yes
2216 old_glibc_headers=no
2218 AC_MSG_RESULT($old_glibc_headers)
2219 if test ${old_glibc_headers} = yes; then
2220 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2221 AC_MSG_WARN(*** be removed.)
2223 AC_SUBST(old_glibc_headers)
2225 AC_SUBST(libc_cv_slibdir)
2226 AC_SUBST(libc_cv_localedir)
2227 AC_SUBST(libc_cv_sysconfdir)
2228 AC_SUBST(libc_cv_rootsbindir)
2229 AC_SUBST(libc_cv_forced_unwind)
2231 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2232 AC_SUBST(libc_cv_cpp_asm_debuginfo)
2233 AC_SUBST(libc_cv_cc_sse4)
2234 AC_SUBST(libc_cv_cc_avx)
2235 AC_SUBST(libc_cv_cc_novzeroupper)
2236 AC_SUBST(libc_cv_as_i686)
2238 AC_SUBST(use_ldconfig)
2239 AC_SUBST(ldd_rewrite_script)
2241 AC_SUBST(elf) AC_SUBST(xcoff)
2242 if test $elf = yes; then
2245 if test $xcoff = yes; then
2246 AC_DEFINE(HAVE_XCOFF)
2251 if test $shared = default; then
2255 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2256 [libc_cv_pic_default=yes
2257 cat > conftest.c <<EOF
2258 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2259 # error PIC is default.
2262 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2263 libc_cv_pic_default=no
2266 AC_SUBST(libc_cv_pic_default)
2271 AC_SUBST(static_nss)
2272 AC_SUBST(nopic_initfini)
2276 dnl See sysdeps/mach/configure.in for this variable.
2277 AC_SUBST(mach_interface_list)
2279 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2282 config_makefile=Makefile
2285 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2286 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2290 AC_CONFIG_FILES([config.make ${config_makefile}])
2291 AC_CONFIG_COMMANDS([default],[[
2292 case $CONFIG_FILES in *config.make*)
2293 echo "$config_vars" >> config.make;;
2295 test -d bits || mkdir bits]],[[config_vars='$config_vars']])