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_SUBST(use_default_link)
118 AC_ARG_WITH([default-link],
119 AC_HELP_STRING([--with-default-link],
120 [do not use explicit linker scripts]),
121 [use_default_link=$withval],
122 [use_default_link=default])
124 AC_ARG_ENABLE([sanity-checks],
125 AC_HELP_STRING([--disable-sanity-checks],
126 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
127 [enable_sanity=$enableval],
130 AC_SUBST(enable_check_abi)
131 AC_ARG_ENABLE([check-abi],
132 AC_HELP_STRING([--enable-check-abi],
133 [do "make check-abi" in "make check" (no/warn/yes)
134 @<:@default=no@:>@]),
135 [enable_check_abi=$enableval],
136 [enable_check_abi=no])
138 dnl Arguments to enable or disable building the static, shared, profiled,
139 dnl and -fomit-frame-pointer libraries.
140 dnl I've disabled this for now since we cannot build glibc without static
141 dnl libraries built in the moment.
142 dnl AC_ARG_ENABLE([static],
143 dnl AC_HELP_STRING([--enable-static],
144 dnl [build static library @<:@default=yes@:>@]),
145 dnl [static=$enableval],
148 AC_ARG_ENABLE([shared],
149 AC_HELP_STRING([--enable-shared],
150 [build shared library @<:@default=yes if GNU ld & ELF@:>@]),
153 AC_ARG_ENABLE([profile],
154 AC_HELP_STRING([--enable-profile],
155 [build profiled library @<:@default=no@:>@]),
156 [profile=$enableval],
158 AC_ARG_ENABLE([omitfp],
159 AC_HELP_STRING([--enable-omitfp],
160 [build undebuggable optimized library @<:@default=no@:>@]),
163 AC_ARG_ENABLE([bounded],
164 AC_HELP_STRING([--enable-bounded],
165 [build with runtime bounds checking @<:@default=no@:>@]),
166 [bounded=$enableval],
168 AC_ARG_ENABLE([versioning],
169 AC_HELP_STRING([--disable-versioning],
170 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
171 [enable_versioning=$enableval],
172 [enable_versioning=yes])
174 AC_ARG_ENABLE([oldest-abi],
175 AC_HELP_STRING([--enable-oldest-abi=ABI],
176 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
177 [oldest_abi=$enableval],
179 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
182 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
186 AC_ARG_ENABLE([stackguard-randomization],
187 AC_HELP_STRING([--enable-stackguard-randomization],
188 [initialize __stack_chk_guard canary with a random number at program start]),
189 [enable_stackguard_randomize=$enableval],
190 [enable_stackguard_randomize=no])
191 if test "$enable_stackguard_randomize" = yes; then
192 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
195 dnl Generic infrastructure for drop-in additions to libc.
196 AC_ARG_ENABLE([add-ons],
197 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
198 [configure and build add-ons in DIR1,DIR2,...
199 search for add-ons if no parameter given]),
200 , [enable_add_ons=yes])
202 dnl Let the user avoid using TLS. Don't know why but...
204 AC_HELP_STRING([--with-tls],
205 [enable support for TLS]),
209 AC_ARG_WITH([__thread],
210 AC_HELP_STRING([--without-__thread],
211 [do not use TLS features even when supporting them]),
212 [use__thread=$withval],
215 AC_ARG_ENABLE([hidden-plt],
216 AC_HELP_STRING([--disable-hidden-plt],
217 [do not hide internal function calls to avoid PLT]),
220 if test "x$hidden" = xno; then
224 AC_ARG_ENABLE([bind-now],
225 AC_HELP_STRING([--enable-bind-now],
226 [disable lazy relocations in DSOs]),
227 [bindnow=$enableval],
231 dnl On some platforms we cannot use dynamic loading. We must provide
232 dnl static NSS modules.
233 AC_ARG_ENABLE([static-nss],
234 AC_HELP_STRING([--enable-static-nss],
235 [build static NSS modules @<:@default=no@:>@]),
236 [static_nss=$enableval],
238 dnl Enable static NSS also if we build no shared objects.
239 if test x"$static_nss" = xyes || test x"$shared" = xno; then
241 AC_DEFINE(DO_STATIC_NSS)
244 AC_ARG_ENABLE([force-install],
245 AC_HELP_STRING([--disable-force-install],
246 [don't force installation of files from this package, even if they are older than the installed files]),
247 [force_install=$enableval],
249 AC_SUBST(force_install)
251 dnl On some platforms we allow dropping compatibility with all kernel
253 AC_ARG_ENABLE([kernel],
254 AC_HELP_STRING([--enable-kernel=VERSION],
255 [compile for compatibility with kernel not older than VERSION]),
256 [minimum_kernel=$enableval],
258 dnl Prevent unreasonable values.
259 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
260 # Better nothing than this.
263 if test "$minimum_kernel" = current; then
264 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
268 dnl For the development we sometimes want gcc to issue even more warnings.
269 dnl This is not the default since many of the extra warnings are not
271 AC_ARG_ENABLE([all-warnings],
272 AC_HELP_STRING([--enable-all-warnings],
273 [enable all useful warnings gcc can issue]),
274 [all_warnings=$enableval],
276 AC_SUBST(all_warnings)
278 AC_ARG_ENABLE([multi-arch],
279 AC_HELP_STRING([--enable-multi-arch],
280 [enable single DSO with optimizations for multiple architectures]),
281 [multi_arch=$enableval],
282 [multi_arch=default])
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="$aux_missing sed")
1048 AC_CHECK_TOOL(READELF, readelf, false)
1050 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
1051 case "x$AUTOCONF" in
1052 xno|x|x:) AUTOCONF=no ;;
1055 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
1056 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
1057 libc_cv_autoconf_works=yes
1059 libc_cv_autoconf_works=no
1061 test $libc_cv_autoconf_works = yes || AUTOCONF=no
1064 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
1065 # If --without-cvs they probably won't change configure.in, so no complaints.
1066 aux_missing="$aux_missing autoconf"
1069 test -n "$critic_missing" && AC_MSG_ERROR([
1070 *** These critical programs are missing or too old:$critic_missing
1071 *** Check the INSTALL file for required versions.])
1073 test -n "$aux_missing" && AC_MSG_WARN([
1074 *** These auxiliary programs are missing or incompatible versions:$aux_missing
1075 *** some features will be disabled.
1076 *** Check the INSTALL file for required versions.])
1078 # if using special system headers, find out the compiler's sekrit
1079 # header directory and add that to the list. NOTE: Only does the right
1080 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
1081 if test -n "$sysheaders"; then
1082 SYSINCLUDES=-nostdinc
1083 for d in include include-fixed; do
1084 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
1085 SYSINCLUDES="$SYSINCLUDES -isystem $i"
1087 SYSINCLUDES="$SYSINCLUDES \
1088 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
1089 if test -n "$CXX"; then
1090 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
1091 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
1092 cxxheaders=`$CXX -print-file-name=../../../../include/c++/`"$cxxversion" &&
1093 CXX_SYSINCLUDES="-isystem $cxxheaders \
1094 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
1097 AC_SUBST(SYSINCLUDES)
1098 AC_SUBST(CXX_SYSINCLUDES)
1100 # ranlib is never necessary on Linux and Hurd systems
1103 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1104 # since this would lead to problems installing/building glibc.
1105 # LD_LIBRARY_PATH contains the current directory if one of the following
1107 # - one of the terminals (":" and ";") is the first or last sign
1108 # - two terminals occur directly after each other
1109 # - the path contains an element with a dot in it
1110 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1112 case ${LD_LIBRARY_PATH} in
1113 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1114 ld_library_path_setting="contains current directory"
1117 ld_library_path_setting="ok"
1121 AC_MSG_RESULT($ld_library_path_setting)
1122 if test "$ld_library_path_setting" != "ok"; then
1124 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1125 *** building glibc. Please change the environment variable
1126 *** and run configure again.])
1129 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1130 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
1131 libc_cv_gcc_static_libgcc=
1133 libc_cv_gcc_static_libgcc=-static-libgcc
1135 AC_SUBST(libc_cv_gcc_static_libgcc)
1137 AC_PATH_PROG(BASH_SHELL, bash, no)
1138 if test "$BASH_SHELL" != no &&
1139 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1140 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1141 libc_cv_have_bash2=yes
1143 libc_cv_have_bash2=no
1145 AC_SUBST(libc_cv_have_bash2)
1147 dnl We need a ksh compatible shell for tzselect.
1148 if test "$BASH_SHELL" = no; then
1149 AC_PATH_PROG(KSH, ksh, no)
1150 if test "$KSH" = no; then
1153 libc_cv_have_ksh=yes
1158 libc_cv_have_ksh=yes
1160 AC_SUBST(libc_cv_have_ksh)
1163 AC_PATH_PROG(PERL, perl, no)
1164 if test "$PERL" != no &&
1165 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1168 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1169 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1170 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1172 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
1173 echo '#include <stddef.h>
1174 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
1175 if eval "$ac_cpp conftest.c 2>/dev/null" \
1176 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
1177 libc_cv_signed_size_t=no
1179 libc_cv_signed_size_t=yes
1182 if test $libc_cv_signed_size_t = yes; then
1183 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
1184 cat >> confdefs.h <<\EOF
1185 #undef __SIZE_TYPE__
1186 #define __SIZE_TYPE__ unsigned
1190 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1192 [#define __need_size_t
1193 #define __need_wchar_t
1196 #include <stddef.h>], [size_t size; wchar_t wchar;
1198 #error stddef.h ignored __need_*
1200 if (&size == NULL || &wchar == NULL) abort ();],
1201 libc_cv_friendly_stddef=yes,
1202 libc_cv_friendly_stddef=no)])
1203 if test $libc_cv_friendly_stddef = yes; then
1204 config_vars="$config_vars
1205 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1208 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1209 libc_cv_need_minus_P, [dnl
1210 cat > conftest.S <<EOF
1211 #include "confdefs.h"
1212 /* Nothing whatsoever. */
1214 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1215 libc_cv_need_minus_P=no
1217 libc_cv_need_minus_P=yes
1220 if test $libc_cv_need_minus_P = yes; then
1221 config_vars="$config_vars
1222 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1225 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1226 cat > conftest.s <<EOF
1229 .set glibc_conftest_frobozz,foo
1230 $libc_cv_asm_global_directive glibc_conftest_frobozz
1232 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1233 # (but it doesn't work), so we must do a linking check to be sure.
1234 cat > conftest1.c <<\EOF
1235 extern int glibc_conftest_frobozz;
1236 void _start() { glibc_conftest_frobozz = 1; }
1238 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1239 -nostartfiles -nostdlib \
1240 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1241 libc_cv_asm_set_directive=yes
1243 libc_cv_asm_set_directive=no
1246 if test $libc_cv_asm_set_directive = yes; then
1247 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1250 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1251 libc_cv_asm_unique_object, [dnl
1252 cat > conftest.s <<EOF
1255 .type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
1257 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1258 libc_cv_asm_unique_object=yes
1260 libc_cv_asm_unique_object=no
1263 if test $libc_cv_asm_unique_object = yes; then
1264 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1267 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1268 [cat > conftest.s <<EOF
1271 .symver _sym,sym@VERS
1273 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1274 libc_cv_asm_symver_directive=yes
1276 libc_cv_asm_symver_directive=no
1279 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1280 if test $libc_cv_asm_symver_directive = yes; then
1281 cat > conftest.s <<EOF
1284 .symver _sym,sym@VERS
1286 cat > conftest.map <<EOF
1295 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1296 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1297 -o conftest.so conftest.o
1298 -nostartfiles -nostdlib
1299 -Wl,--version-script,conftest.map
1300 1>&AS_MESSAGE_LOG_FD]);
1302 libc_cv_ld_version_script_option=yes
1304 libc_cv_ld_version_script_option=no
1307 libc_cv_ld_version_script_option=no
1310 libc_cv_ld_version_script_option=no
1313 if test $shared != no &&
1314 test $libc_cv_asm_symver_directive = yes &&
1315 test $libc_cv_ld_version_script_option = yes &&
1316 test $enable_versioning = yes; then
1318 AC_DEFINE(DO_VERSIONING)
1322 AC_SUBST(VERSIONING)
1324 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1326 *** WARNING: You should not compile GNU libc without versioning. Not using
1327 *** versioning will introduce incompatibilities so that old binaries
1328 *** will not run anymore.
1329 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1331 if test $elf = yes; then
1332 AC_CACHE_CHECK(for .previous assembler directive,
1333 libc_cv_asm_previous_directive, [dnl
1334 cat > conftest.s <<EOF
1335 .section foo_section
1338 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1339 libc_cv_asm_previous_directive=yes
1341 libc_cv_asm_previous_directive=no
1344 if test $libc_cv_asm_previous_directive = yes; then
1345 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1347 AC_CACHE_CHECK(for .popsection assembler directive,
1348 libc_cv_asm_popsection_directive, [dnl
1349 cat > conftest.s <<EOF
1350 .pushsection foo_section
1353 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1354 libc_cv_asm_popsection_directive=yes
1356 libc_cv_asm_popsection_directive=no
1359 if test $libc_cv_asm_popsection_directive = yes; then
1360 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1363 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1364 libc_cv_asm_protected_directive, [dnl
1365 cat > conftest.s <<EOF
1371 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1372 libc_cv_asm_protected_directive=yes
1374 AC_MSG_ERROR(assembler support for symbol visibility is required)
1378 if test $libc_cv_asm_protected_directive = yes; then
1379 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1380 libc_cv_visibility_attribute,
1381 [cat > conftest.c <<EOF
1382 int foo __attribute__ ((visibility ("hidden"))) = 1;
1383 int bar __attribute__ ((visibility ("protected"))) = 1;
1385 libc_cv_visibility_attribute=no
1386 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1387 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1388 if grep '\.protected.*bar' conftest.s >/dev/null; then
1389 libc_cv_visibility_attribute=yes
1393 rm -f conftest.{c,s}
1395 if test $libc_cv_visibility_attribute != yes; then
1396 AC_MSG_ERROR(compiler support for visibility attribute is required)
1400 if test $libc_cv_visibility_attribute = yes; then
1401 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1402 libc_cv_broken_visibility_attribute,
1403 [cat > conftest.c <<EOF
1405 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1406 int bar (int x) { return x; }
1408 libc_cv_broken_visibility_attribute=yes
1409 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1411 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1413 libc_cv_broken_visibility_attribute=no
1416 rm -f conftest.c conftest.s
1418 if test $libc_cv_broken_visibility_attribute = yes; then
1419 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1423 AC_CACHE_CHECK(for broken __attribute__((alias())),
1424 libc_cv_broken_alias_attribute,
1425 [cat > conftest.c <<EOF
1426 extern int foo (int x) __asm ("xyzzy");
1427 int bar (int x) { return x; }
1428 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1430 extern __typeof (dfoo) dfoo __asm ("abccb");
1433 libc_cv_broken_alias_attribute=yes
1434 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1435 if grep 'xyzzy' conftest.s >/dev/null &&
1436 grep 'abccb' conftest.s >/dev/null; then
1437 libc_cv_broken_alias_attribute=no
1440 rm -f conftest.c conftest.s
1442 if test $libc_cv_broken_alias_attribute = yes; then
1443 AC_MSG_ERROR(working alias attribute support required)
1446 if test $libc_cv_visibility_attribute = yes; then
1447 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1448 libc_cv_have_sdata_section,
1449 [echo "int i;" > conftest.c
1450 libc_cv_have_sdata_section=no
1451 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1452 | grep '\.sdata' >/dev/null; then
1453 libc_cv_have_sdata_section=yes
1455 rm -f conftest.c conftest.so
1457 if test $libc_cv_have_sdata_section = yes; then
1458 AC_DEFINE(HAVE_SDATA_SECTION)
1462 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1463 libc_cv_initfini_array, [dnl
1464 cat > conftest.c <<EOF
1465 int _start (void) { return 0; }
1466 int __start (void) { return 0; }
1467 int foo (void) { return 1; }
1468 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1470 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1471 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1473 if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1474 libc_cv_initfini_array=yes
1476 libc_cv_initfini_array=no
1479 libc_cv_initfini_array=no
1482 if test $libc_cv_initfini_array != yes; then
1483 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1486 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1487 libc_cv_ctors_header, [dnl
1488 libc_cv_ctors_header=yes
1490 __attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
1491 __attribute__ ((destructor)) void dtor (void) { puts("dtor"); }
1494 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1495 { gsub(/\@<:@ */, "@<:@") }
1496 $2 == ".ctors" || $2 == ".dtors" {
1497 size = strtonum("0x" $6)
1498 align = strtonum("0x" $NF)
1500 stub@<:@$2@:>@ = size == align * 2
1503 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1504 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1505 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1507 '], [libc_cv_ctors_header=no])
1509 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1512 if test $libc_cv_ctors_header = no; then
1513 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1516 AC_CACHE_CHECK(for libunwind-support in compiler,
1517 libc_cv_cc_with_libunwind, [
1518 cat > conftest.c <<EOF
1519 int main (void) { return 0; }
1521 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1522 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1523 libc_cv_cc_with_libunwind=yes
1525 libc_cv_cc_with_libunwind=no
1528 AC_SUBST(libc_cv_cc_with_libunwind)
1529 if test $libc_cv_cc_with_libunwind = yes; then
1530 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1533 AC_CACHE_CHECK(for -z nodelete option,
1534 libc_cv_z_nodelete, [dnl
1535 cat > conftest.c <<EOF
1536 int _start (void) { return 42; }
1538 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1539 -fPIC -shared -o conftest.so conftest.c
1540 -nostartfiles -nostdlib
1541 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1543 libc_cv_z_nodelete=yes
1545 AC_MSG_ERROR(linker with -z nodelete support required)
1549 AC_CACHE_CHECK(for -z nodlopen option,
1550 libc_cv_z_nodlopen, [dnl
1551 cat > conftest.c <<EOF
1552 int _start (void) { return 42; }
1554 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1555 -fPIC -shared -o conftest.so conftest.c
1556 -nostartfiles -nostdlib
1557 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1559 libc_cv_z_nodlopen=yes
1561 AC_MSG_ERROR(linker with -z nodlopen support required)
1565 AC_CACHE_CHECK(for -z initfirst option,
1566 libc_cv_z_initfirst, [dnl
1567 cat > conftest.c <<EOF
1568 int _start (void) { return 42; }
1570 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1571 -fPIC -shared -o conftest.so conftest.c
1572 -nostartfiles -nostdlib
1573 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1575 libc_cv_z_initfirst=yes
1577 AC_MSG_ERROR(linker with -z initfirst support required)
1581 # Add-on fragments can set these for other machines.
1582 libc_commonpagesize=${libc_commonpagesize:-no}
1583 libc_relro_required=${libc_relro_required:-no}
1584 case "$base_machine" in
1585 i[[34567]]86 | x86_64 | powerpc* | s390*)
1586 libc_commonpagesize=0x1000
1587 libc_relro_required=yes
1590 libc_commonpagesize=0x2000
1591 libc_relro_required=yes
1594 libc_commonpagesize=0x4000
1597 libc_commonpagesize=0x10000
1598 libc_relro_required=yes
1602 if test $libc_commonpagesize != no; then
1603 AC_CACHE_CHECK(for -z relro option,
1604 libc_cv_z_relro, [dnl
1606 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1607 int _start (void) { return 42; }
1608 extern void _exit (int);
1609 /* Since these pointers are const, they should go in rodata.
1610 Since they refer to functions that have to be resolved by
1611 dynamic linking, they should instead go in RELRO data. */
1612 const void *const relro[] = { &_start, &_exit, 0 };
1613 /* GNU ld fails to produce RELRO data when it's very small and there is no
1614 normal writable data following it, or if only uninitialized (.bss) data
1615 follows it, or only very small writable data. */
1616 int data[0x10000] = { 1, };
1618 cat > conftest.awk <<\EOF
1621 commonpagesize = strtonum(commonpagesize)
1623 { print "LINE:", $0 > "/dev/stderr" }
1625 vaddr = strtonum($3)
1626 memsz = strtonum($6)
1628 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1629 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1630 result = (end % commonpagesize == 0) ? "yes" : "broken"
1632 END { print result }
1634 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1635 -fPIC -shared -o conftest.so conftest.c
1636 -nostartfiles -nostdlib
1637 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1638 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1640 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1641 conftest.ph > conftest.cps
1643 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1645 if { test "x$libc_relro_required" = xyes &&
1646 test "x$libc_cv_z_relro" != xyes
1649 AC_MSG_ERROR(linker with -z relro support required)
1652 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1655 AC_CACHE_CHECK(for -Bgroup option,
1656 libc_cv_Bgroup, [dnl
1657 cat > conftest.c <<EOF
1658 int _start (void) { return 42; }
1660 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1661 -fPIC -shared -o conftest.so conftest.c
1662 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1669 AC_SUBST(libc_cv_Bgroup)
1671 AC_CACHE_CHECK(for libgcc_s suffix,
1672 libc_cv_libgcc_s_suffix, [dnl
1673 cat > conftest.c <<EOF
1674 int main (void) { return 0; }
1677 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1678 -fPIC -shared -shared-libgcc -o conftest.so \
1679 conftest.c -v 2>&1 >/dev/null \
1680 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1683 AC_SUBST(libc_cv_libgcc_s_suffix)
1685 AC_CACHE_CHECK(for --as-needed option,
1686 libc_cv_as_needed, [dnl
1687 cat > conftest.c <<EOF
1688 int main (void) { return 0; }
1690 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1691 -fPIC -shared -o conftest.so conftest.c
1692 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1693 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1695 libc_cv_as_needed=yes
1697 libc_cv_as_needed=no
1700 AC_SUBST(libc_cv_as_needed)
1703 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1704 libc_cv_as_noexecstack, [dnl
1705 cat > conftest.c <<EOF
1708 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1709 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1710 && grep -q .note.GNU-stack conftest.s \
1711 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1712 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1714 libc_cv_as_noexecstack=yes
1716 libc_cv_as_noexecstack=no
1719 if test $libc_cv_as_noexecstack = yes; then
1720 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1722 AC_SUBST(ASFLAGS_config)
1724 AC_CACHE_CHECK(for -z combreloc,
1725 libc_cv_z_combreloc, [dnl
1726 cat > conftest.c <<EOF
1727 extern int bar (int);
1729 int foo (void) { return bar (mumble); }
1731 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1732 -fPIC -shared -o conftest.so conftest.c
1733 -nostdlib -nostartfiles
1734 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1736 dnl The following test is a bit weak. We must use a tool which can test
1737 dnl cross-platform since the gcc used can be a cross compiler. Without
1738 dnl introducing new options this is not easily doable. Instead use a tool
1739 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1740 dnl look for a section named .rel.dyn.
1741 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1742 libc_cv_z_combreloc=yes
1744 libc_cv_z_combreloc=no
1747 libc_cv_z_combreloc=no
1750 if test "$libc_cv_z_combreloc" = yes; then
1751 AC_DEFINE(HAVE_Z_COMBRELOC)
1753 AC_SUBST(libc_cv_z_combreloc)
1755 AC_CACHE_CHECK(for -z execstack,
1756 libc_cv_z_execstack, [dnl
1757 cat > conftest.c <<EOF
1758 int _start (void) { return 42; }
1760 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1761 -fPIC -shared -o conftest.so conftest.c
1762 -Wl,-z,execstack -nostdlib
1763 1>&AS_MESSAGE_LOG_FD])
1765 libc_cv_z_execstack=yes
1767 libc_cv_z_execstack=no
1770 AC_SUBST(libc_cv_z_execstack)
1772 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1773 cat > conftest.c <<EOF
1775 main () { return 0;}
1777 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1778 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1786 AC_SUBST(libc_cv_fpie)
1788 AC_CACHE_CHECK(for --hash-style option,
1789 libc_cv_hashstyle, [dnl
1790 cat > conftest.c <<EOF
1791 int _start (void) { return 42; }
1793 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1794 -fPIC -shared -o conftest.so conftest.c
1795 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1797 libc_cv_hashstyle=yes
1799 libc_cv_hashstyle=no
1802 AC_SUBST(libc_cv_hashstyle)
1804 # The linker's default -shared behavior is good enough if it
1805 # does these things that our custom linker scripts ensure that
1806 # all allocated NOTE sections come first.
1807 if test "$use_default_link" = default; then
1808 AC_CACHE_CHECK([for sufficient default -shared layout],
1809 libc_cv_use_default_link, [dnl
1810 libc_cv_use_default_link=no
1811 cat > conftest.s <<\EOF
1812 .section .note.a,"a",%note
1817 .section .note.b,"a",%note
1823 if AC_TRY_COMMAND([dnl
1824 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1825 ac_try=`$READELF -S conftest.so | sed -n \
1827 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1833 libc_seen_a=no libc_seen_b=no
1835 while test $# -ge 2 -a "$1" = NOTE; do
1837 .note.a) libc_seen_a=yes ;;
1838 .note.b) libc_seen_b=yes ;;
1842 case "$libc_seen_a$libc_seen_b" in
1844 libc_cv_use_default_link=yes
1847 echo >&AS_MESSAGE_LOG_FD "\
1848 $libc_seen_a$libc_seen_b from:
1854 use_default_link=$libc_cv_use_default_link
1858 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1859 if libc_cv_output_format=`
1860 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1864 libc_cv_output_format=
1866 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1867 AC_SUBST(libc_cv_output_format)
1869 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1870 cat > conftest.c <<EOF
1873 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1874 conftest.c 1>&AS_MESSAGE_LOG_FD])
1876 libc_cv_fno_toplevel_reorder=yes
1878 libc_cv_fno_toplevel_reorder=no
1881 if test $libc_cv_fno_toplevel_reorder = yes; then
1882 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1884 fno_unit_at_a_time=-fno-unit-at-a-time
1886 AC_SUBST(fno_unit_at_a_time)
1888 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1889 cat > conftest.c <<EOF
1891 main () { return 0;}
1893 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
1894 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1901 AC_SUBST(libc_cv_ssp)
1903 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1904 cat > conftest.c <<EOF
1906 #ifdef __GNUC_GNU_INLINE__
1907 main () { return 0;}
1912 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1913 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1915 libc_cv_gnu89_inline=yes
1917 libc_cv_gnu89_inline=no
1920 if test $libc_cv_gnu89_inline = yes; then
1921 gnu89_inline=-fgnu89-inline
1925 AC_SUBST(gnu89_inline)
1927 if test $elf != yes; then
1928 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1929 [AC_TRY_COMPILE(, [asm (".section .init");
1930 asm (".section .fini");
1931 asm ("${libc_cv_dot_text}");],
1932 libc_cv_have_initfini=yes,
1933 libc_cv_have_initfini=no)])
1934 AC_SUBST(libc_cv_have_initfini)dnl
1935 if test $libc_cv_have_initfini = yes; then
1936 AC_DEFINE(HAVE_INITFINI)
1940 if test $elf = yes; then
1941 AC_CACHE_CHECK(whether cc puts quotes around section names,
1942 libc_cv_have_section_quotes,
1943 [cat > conftest.c <<EOF
1944 static const int foo
1945 __attribute__ ((section ("bar"))) = 1;
1947 if ${CC-cc} -S conftest.c -o conftest.s; then
1948 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1949 libc_cv_have_section_quotes=yes
1951 libc_cv_have_section_quotes=no
1954 libc_cv_have_section_quotes=unknown
1956 rm -f conftest.{c,s}
1958 if test $libc_cv_have_section_quotes = yes; then
1959 AC_DEFINE(HAVE_SECTION_QUOTES)
1963 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1964 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1965 [cat > conftest.$ac_ext <<EOF
1966 dnl This sometimes fails to find confdefs.h, for some reason.
1967 dnl [#]line $LINENO "[$]0"
1968 [#]line $LINENO "configure"
1969 #include "confdefs.h"
1970 void underscore_test(void) {
1973 if AC_TRY_EVAL(ac_compile); then
1974 if grep _underscore_test conftest* >/dev/null; then
1975 ifelse([$1], , :, [rm -f conftest*
1978 ifelse([$2], , , [rm -f conftest*
1982 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1983 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1984 ifelse([$2], , , [rm -f conftest*
1989 if test $elf = yes; then
1990 libc_cv_asm_underscores=no
1992 if test $ac_cv_prog_cc_works = yes; then
1993 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1994 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1995 libc_cv_asm_underscores=yes,
1996 libc_cv_asm_underscores=no)])
1998 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1999 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
2000 libc_cv_asm_underscores=no)])
2003 if test $libc_cv_asm_underscores = no; then
2004 AC_DEFINE(NO_UNDERSCORES)
2007 if test $elf = yes; then
2008 libc_cv_weak_symbols=yes
2011 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
2013 cat > conftest.s <<EOF
2015 ${libc_cv_asm_global_directive} foo
2018 .weak bar; bar = foo
2020 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
2021 libc_cv_asm_weak_directive=yes
2023 libc_cv_asm_weak_directive=no
2027 if test $libc_cv_asm_weak_directive = no; then
2028 AC_CACHE_CHECK(for assembler .weakext directive,
2029 libc_cv_asm_weakext_directive,
2031 cat > conftest.s <<EOF
2033 ${libc_cv_asm_global_directive} foo
2037 ${libc_cv_asm_global_directive} baz
2040 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
2041 libc_cv_asm_weakext_directive=yes
2043 libc_cv_asm_weakext_directive=no
2049 if test $libc_cv_asm_weak_directive = yes; then
2050 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
2051 elif test $libc_cv_asm_weakext_directive = yes; then
2052 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
2055 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
2057 sparc/sparc64*) cfi_offset=2047;;
2060 cat > conftest.s <<EOF
2062 .type func,%function
2066 .cfi_rel_offset 1, $cfi_offset
2069 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
2070 libc_cv_asm_cfi_directives=yes
2072 libc_cv_asm_cfi_directives=no
2075 if test $libc_cv_asm_cfi_directives = yes; then
2076 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
2079 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
2080 cat > conftest.c <<\EOF
2085 dnl No \ in command here because it ends up inside ''.
2086 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
2087 -nostdlib -nostartfiles -Wl,--no-whole-archive
2088 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
2089 libc_cv_ld_no_whole_archive=yes
2091 libc_cv_ld_no_whole_archive=no
2094 if test $libc_cv_ld_no_whole_archive = yes; then
2095 no_whole_archive=-Wl,--no-whole-archive
2097 AC_SUBST(no_whole_archive)dnl
2099 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
2100 cat > conftest.c <<\EOF
2105 dnl No \ in command here because it ends up inside ''.
2106 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
2107 -nostdlib -nostartfiles -fexceptions
2108 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
2109 libc_cv_gcc_exceptions=yes
2111 libc_cv_gcc_exceptions=no
2114 if test $libc_cv_gcc_exceptions = yes; then
2115 exceptions=-fexceptions
2117 AC_SUBST(exceptions)dnl
2119 if test "$host_cpu" = powerpc ; then
2120 # Check for a bug present in at least versions 2.8.x of GCC
2121 # and versions 1.0.x of EGCS.
2122 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
2123 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
2124 libc_cv_c_asmcr0_bug='no',
2125 libc_cv_c_asmcr0_bug='yes')])
2126 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
2127 AC_DEFINE(BROKEN_PPC_ASM_CR0)
2131 dnl Check whether compiler understands __builtin_expect.
2132 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
2133 [cat > conftest.c <<EOF
2134 #line $LINENO "configure"
2137 a = __builtin_expect (a, 10);
2138 return a == 10 ? 0 : 1;
2141 dnl No \ in command here because it ends up inside ''.
2142 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
2143 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
2144 libc_cv_gcc_builtin_expect=yes
2146 libc_cv_gcc_builtin_expect=no
2149 if test "$libc_cv_gcc_builtin_expect" = yes; then
2150 AC_DEFINE(HAVE_BUILTIN_EXPECT)
2153 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
2154 cat > conftest.c <<\EOF
2157 __builtin_memset (x, 0, 1000);
2161 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
2163 libc_cv_gcc_builtin_memset=no
2165 libc_cv_gcc_builtin_memset=yes
2168 if test "$libc_cv_gcc_builtin_memset" = yes ; then
2169 AC_DEFINE(HAVE_BUILTIN_MEMSET)
2172 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
2173 cat > conftest.c <<\EOF
2174 extern char *strstr (const char *, const char *) __asm ("my_strstr");
2175 char *foo (const char *a, const char *b)
2177 return __builtin_strstr (a, b);
2181 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
2183 libc_cv_gcc_builtin_redirection=yes
2185 libc_cv_gcc_builtin_redirection=no
2188 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
2189 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
2192 dnl Check whether the compiler supports the __thread keyword.
2193 if test "x$use__thread" != xno; then
2194 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
2195 [cat > conftest.c <<\EOF
2196 __thread int a = 42;
2198 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
2199 libc_cv_gcc___thread=yes
2201 libc_cv_gcc___thread=no
2204 if test "$libc_cv_gcc___thread" = yes; then
2205 AC_DEFINE(HAVE___THREAD)
2208 libc_cv_gcc___thread=no
2211 if test "$libc_cv_gcc___thread" = yes; then
2212 dnl Check whether the compiler supports the tls_model attribute.
2213 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
2214 cat > conftest.c <<\EOF
2215 extern __thread int a __attribute__((tls_model ("initial-exec")));
2217 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
2218 libc_cv_gcc_tls_model_attr=yes
2220 libc_cv_gcc_tls_model_attr=no
2223 if test "$libc_cv_gcc_tls_model_attr" = yes; then
2224 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
2228 if test -n "$submachine"; then
2229 AC_CACHE_CHECK([for compiler option for CPU variant],
2230 libc_cv_cc_submachine, [dnl
2231 libc_cv_cc_submachine=no
2232 for opt in "-march=$submachine" "-mcpu=$submachine"; do
2233 if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
2234 libc_cv_cc_submachine="$opt"
2238 if test "x$libc_cv_cc_submachine" = xno; then
2239 AC_MSG_ERROR([${CC-cc} does not support $submachine])
2242 AC_SUBST(libc_cv_cc_submachine)
2244 dnl Check whether we have the gd library available.
2245 AC_MSG_CHECKING(for libgd)
2246 if test "$with_gd" != "no"; then
2247 old_CFLAGS="$CFLAGS"
2248 CFLAGS="$CFLAGS $libgd_include"
2249 old_LDFLAGS="$LDFLAGS"
2250 LDFLAGS="$LDFLAGS $libgd_ldflags"
2252 LIBS="$LIBS -lgd -lpng -lz -lm"
2253 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
2254 CFLAGS="$old_CFLAGS"
2255 LDFLAGS="$old_LDFLAGS"
2260 AC_MSG_RESULT($LIBGD)
2264 if test x$with_selinux = xno ; then
2267 # See if we have the SELinux library
2268 AC_CHECK_LIB(selinux, is_selinux_enabled,
2269 have_selinux=yes, have_selinux=no)
2270 # See if we have the SELinux header with the NSCD permissions in it.
2271 if test x$have_selinux = xyes ; then
2272 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
2273 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
2274 [#ifdef NSCD__SHMEMHOST
2277 #error NSCD__SHMEMHOST not defined
2279 have_selinux=yes, have_selinux=no)
2280 AC_MSG_RESULT($have_selinux)
2283 if test x$with_selinux = xyes ; then
2284 if test x$have_selinux = xno ; then
2285 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
2289 # Check if we're building with SELinux support.
2290 if test "x$have_selinux" = xyes; then
2291 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2293 # See if we have the libaudit library
2294 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2295 have_libaudit=yes, have_libaudit=no)
2296 if test "x$have_libaudit" = xyes; then
2297 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2299 AC_SUBST(have_libaudit)
2301 # See if we have the libcap library
2302 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2303 if test "x$have_libcap" = xyes; then
2304 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2306 AC_SUBST(have_libcap)
2308 AC_SUBST(have_selinux)
2310 dnl check for the size of 'long double'.
2311 AC_CHECK_SIZEOF(long double, 0)
2312 sizeof_long_double=$ac_cv_sizeof_long_double
2313 AC_SUBST(sizeof_long_double)
2315 ### End of automated tests.
2316 ### Now run sysdeps configure fragments.
2318 # They also can set these variables.
2320 ldd_rewrite_script=no
2321 libc_cv_sysconfdir=$sysconfdir
2322 libc_cv_gcc_unwind_find_fde=no
2325 # Iterate over all the sysdep directories we will use, running their
2326 # configure fragments.
2327 for dir in $sysnames; do
2330 *) dest=$srcdir/$dir ;;
2332 if test -r $dest/configure; then
2333 AC_MSG_RESULT(running configure fragment for $dir)
2338 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2339 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2341 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2343 dnl This is tested by existing code and it's simpler to avoid changing it.
2344 AC_DEFINE(USE_IN_LIBIO)
2346 # Test for old glibc 2.0.x headers so that they can be removed properly
2347 # Search only in includedir.
2348 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2349 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2351 old_glibc_headers=yes
2353 old_glibc_headers=no
2355 AC_MSG_RESULT($old_glibc_headers)
2356 if test ${old_glibc_headers} = yes; then
2357 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2358 AC_MSG_WARN(*** be removed.)
2360 AC_SUBST(old_glibc_headers)
2362 AC_SUBST(libc_cv_slibdir)
2363 AC_SUBST(libc_cv_localedir)
2364 AC_SUBST(libc_cv_sysconfdir)
2365 AC_SUBST(libc_cv_rootsbindir)
2366 AC_SUBST(libc_cv_forced_unwind)
2368 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2369 AC_SUBST(libc_cv_cpp_asm_debuginfo)
2370 AC_SUBST(libc_cv_cc_sse4)
2371 AC_SUBST(libc_cv_cc_avx)
2372 AC_SUBST(libc_cv_cc_novzeroupper)
2373 AC_SUBST(libc_cv_as_i686)
2375 AC_SUBST(use_ldconfig)
2376 AC_SUBST(ldd_rewrite_script)
2378 AC_SUBST(elf) AC_SUBST(xcoff)
2379 if test $elf = yes; then
2382 if test $xcoff = yes; then
2383 AC_DEFINE(HAVE_XCOFF)
2388 if test $shared = default; then
2392 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2393 [libc_cv_pic_default=yes
2394 cat > conftest.c <<EOF
2395 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2396 # error PIC is default.
2399 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2400 libc_cv_pic_default=no
2403 AC_SUBST(libc_cv_pic_default)
2408 AC_SUBST(static_nss)
2409 AC_SUBST(nopic_initfini)
2413 dnl See sysdeps/mach/configure.in for this variable.
2414 AC_SUBST(mach_interface_list)
2416 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2419 config_makefile=Makefile
2422 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2423 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2427 AC_CONFIG_FILES([config.make ${config_makefile}])
2428 AC_CONFIG_COMMANDS([default],[[
2429 case $CONFIG_FILES in *config.make*)
2430 echo "$config_vars" >> config.make;;
2432 test -d bits || mkdir bits]],[[config_vars='$config_vars']])