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 if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
10 AC_MSG_ERROR([you must configure in a separate build directory])
13 # This will get text that should go into config.make.
16 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
18 AC_HELP_STRING([--with-gmp=DIRECTORY],
19 [find GMP source code in DIRECTORY (not needed)]),
22 yes) AC_MSG_ERROR([--with-gmp requires an argument; use --with-gmp=DIRECTORY]) ;;
24 *) config_vars="$config_vars
25 gmp-srcdir = $withval" ;;
28 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
30 AC_HELP_STRING([--with-gd=DIR],
31 [find libgd include dir and library with prefix DIR]),
35 *) libgd_include="-I$withval/include"
36 libgd_ldflags="-L$withval/lib" ;;
39 AC_ARG_WITH([gd-include],
40 AC_HELP_STRING([--with-gd-include=DIR],
41 [find libgd include files in DIR]),
43 case "$with_gd_include" in
45 *) libgd_include="-I$withval" ;;
49 AC_HELP_STRING([--with-gd-lib=DIR],
50 [find libgd library files in DIR]),
52 case "$with_gd_lib" in
54 *) libgd_ldflags="-L$withval" ;;
58 if test -n "$libgd_include"; then
59 config_vars="$config_vars
60 CFLAGS-memusagestat.c = $libgd_include"
62 if test -n "$libgd_ldflags"; then
63 config_vars="$config_vars
64 libgd-LDFLAGS = $libgd_ldflags"
67 dnl Arguments to specify presence of other packages/features.
69 AC_HELP_STRING([--with-fp],
70 [if using floating-point hardware @<:@default=yes@:>@]),
74 AC_ARG_WITH([binutils],
75 AC_HELP_STRING([--with-binutils=PATH],
76 [specify location of binutils (as and ld)]),
77 [path_binutils=$withval],
80 AC_HELP_STRING([--with-elf],
81 [if using the ELF object format]),
85 AC_HELP_STRING([--with-xcoff],
86 [if using the XCOFF object format]),
90 AC_HELP_STRING([--without-cvs],
91 [if CVS should not be used]),
94 if test "$with_cvs" = yes; then
95 if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
102 AC_ARG_WITH([headers],
103 AC_HELP_STRING([--with-headers=PATH],
104 [location of system headers to use
105 (for example /usr/src/linux/include)
106 @<:@default=compiler default@:>@]),
107 [sysheaders=$withval],
110 AC_ARG_ENABLE([sanity-checks],
111 AC_HELP_STRING([--disable-sanity-checks],
112 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
113 [enable_sanity=$enableval],
116 dnl Arguments to enable or disable building the static, shared, profiled,
117 dnl and -fomit-frame-pointer libraries.
118 dnl I've disabled this for now since we cannot build glibc without static
119 dnl libraries built in the moment.
120 dnl AC_ARG_ENABLE([static],
121 dnl AC_HELP_STRING([--enable-static],
122 dnl [build static library @<:@default=yes@:>@]),
123 dnl [static=$enableval],
126 AC_ARG_ENABLE([shared],
127 AC_HELP_STRING([--enable-shared],
128 [build shared library @<:@default=yes if GNU ld & ELF@:>@]),
131 AC_ARG_ENABLE([profile],
132 AC_HELP_STRING([--enable-profile],
133 [build profiled library @<:@default=yes@:>@]),
134 [profile=$enableval],
136 AC_ARG_ENABLE([omitfp],
137 AC_HELP_STRING([--enable-omitfp],
138 [build undebuggable optimized library @<:@default=no@:>@]),
141 AC_ARG_ENABLE([bounded],
142 AC_HELP_STRING([--enable-bounded],
143 [build with runtime bounds checking @<:@default=no@:>@]),
144 [bounded=$enableval],
146 AC_ARG_ENABLE([versioning],
147 AC_HELP_STRING([--disable-versioning],
148 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
149 [enable_versioning=$enableval],
150 [enable_versioning=yes])
152 AC_ARG_ENABLE([oldest-abi],
153 AC_HELP_STRING([--enable-oldest-abi=ABI],
154 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
155 [oldest_abi=$enableval],
157 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
160 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
164 dnl Generic infrastructure for drop-in additions to libc.
165 AC_ARG_ENABLE([add-ons],
166 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
167 [configure and build add-ons in DIR1,DIR2,... search for add-ons if no parameter given]),
168 [case "$enableval" in
169 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
170 test "$add_ons" = "*" && add_ons= ;;
171 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
175 dnl Let the user avoid using TLS. Don't know why but...
176 dnl XXX For now we disable support by default.
178 AC_HELP_STRING([--with-tls],
179 [enable support for TLS]),
183 AC_ARG_WITH([__thread],
184 AC_HELP_STRING([--without-__thread],
185 [do not use TLS features even when supporting them]),
186 [use__thread=$withval],
189 AC_ARG_ENABLE([hidden-plt],
190 AC_HELP_STRING([--disable-hidden-plt],
191 [do not hide internal function calls to avoid PLT]),
194 if test "x$hidden" = xno; then
198 AC_CONFIG_SUBDIRS([ ])dnl Bonehead new Autoconf whines if we do it cleanly.
200 if test x"$add_ons" != x; then
201 for f in $add_ons; do
203 if test "$f" = "crypt"; then
205 *** It seems that you're using an old \`crypt' add-on. crypt is now
206 *** part of glibc and using the old add-on will not work with this
207 *** release. Start again with fresh sources and without the old
208 *** \`crypt' add-on.])
210 if test "$f" = "localedata"; then
212 *** It seems that you're using an old \`localedata' add-on. localedata
213 *** is now part of glibc and using the old add-on will not work with
214 *** this release. Start again with fresh sources and without the old
215 *** \`localedata' add-on.])
217 # Test whether such a subdir really exists.
218 if test -d $srcdir/$f; then
219 add_ons_pfx="$add_ons_pfx $f/"
220 dnl This variable is what AC_CONFIG_SUBDIRS is supposed to set,
221 dnl but the new Autoconf maintainers don't care about compatibility
222 dnl so we cannot use it normally any more without complaints.
223 subdirs="$subdirs $f"
225 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
230 dnl On some platforms we cannot use dynamic loading. We must provide
231 dnl static NSS modules.
232 AC_ARG_ENABLE([static-nss],
233 AC_HELP_STRING([--enable-static-nss],
234 [build static NSS modules @<:@default=no@:>@]),
235 [static_nss=$enableval],
237 dnl Enable static NSS also if we build no shared objects.
238 if test x"$static_nss" = xyes || test x"$shared" = xno; then
240 AC_DEFINE(DO_STATIC_NSS)
243 AC_ARG_ENABLE([force-install],
244 AC_HELP_STRING([--disable-force-install],
245 [don't force installation of files from this package, even if they are older than the installed files]),
246 [force_install=$enableval],
248 AC_SUBST(force_install)
250 dnl On some platforms we allow dropping compatibility with all kernel
252 AC_ARG_ENABLE([kernel],
253 AC_HELP_STRING([--enable-kernel=VERSION],
254 [compile for compatibility with kernel not older than VERSION]),
255 [minimum_kernel=$enableval],
257 dnl Prevent unreasonable values.
258 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
259 # Better nothing than this.
262 if test "$minimum_kernel" = current; then
263 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
267 dnl For the development we sometimes want gcc to issue even more warnings.
268 dnl This is not the default since many of the extra warnings are not
270 AC_ARG_ENABLE([all-warnings],
271 AC_HELP_STRING([--enable-all-warnings],
272 [enable all useful warnings gcc can issue]),
273 [all_warnings=$enableval],
275 AC_SUBST(all_warnings)
279 # The way shlib-versions is used to generate soversions.mk uses a
280 # fairly simplistic model for name recognition that can't distinguish
281 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
282 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
283 # tell. This doesn't get used much beyond that, so it's fairly safe.
288 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
292 # We keep the original values in `$config_*' and never modify them, so we
293 # can write them unchanged into config.make. Everything else uses
294 # $machine, $vendor, and $os, and changes them whenever convenient.
295 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
297 # Don't allow vendor == "unknown"
298 test "$config_vendor" = unknown && config_vendor=
299 config_os="`echo $config_os | sed 's/^unknown-//'`"
301 # Some configurations imply other options.
303 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
304 # These systems always use GNU tools.
305 gnu_ld=yes gnu_as=yes ;;
308 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
309 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
311 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
312 # These systems (almost) always use the ELF format.
316 # These systems are always xcoff
322 machine=$config_machine
323 vendor=$config_vendor
326 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
328 if test "$machine" = rs6000; then
332 # Braindead PowerPC box with absolutely no FPU.
333 case "$machine-$host_os" in
340 ### I put this here to prevent those annoying emails from people who cannot
341 ### read and try to compile glibc on unsupported platforms. --drepper
343 ### By using the undocumented --enable-hacker-mode option for configure
344 ### one can skip this test to make the configuration not fail for unsupported
347 if test -z "$enable_hacker_mode"; then
348 case "$machine-$host_os" in
349 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
352 echo "*** The GNU C library is currently not available for this platform."
353 echo "*** So far nobody cared to port it and if there is no volunteer it"
354 echo "*** might never happen. So, if you have interest to see glibc on"
355 echo "*** this platform visit"
356 echo "*** http://www.gnu.org/software/libc/porting.html"
357 echo "*** and join the group of porters"
363 dnl We need to use [ and ] for other purposes for a while now.
365 # Expand the configuration machine name into a subdirectory by architecture
366 # type and particular chip.
368 a29k | am29000) base_machine=a29k machine=a29k ;;
369 alpha*) base_machine=alpha machine=alpha/$machine ;;
370 arm*) base_machine=arm machine=arm/arm32/$machine ;;
371 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
372 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
373 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
374 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
375 i[3456]86) base_machine=i386 machine=i386/$machine ;;
376 ia64) base_machine=ia64 machine=ia64 ;;
377 m680?0) base_machine=m68k machine=m68k/$machine ;;
378 m68k) base_machine=m68k machine=m68k/m68020 ;;
379 m88???) base_machine=m88k machine=m88k/$machine ;;
380 m88k) base_machine=m88k machine=m88k/m88100 ;;
381 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
382 mips*) base_machine=mips machine=mips/$machine ;;
383 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
384 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
385 s390) base_machine=s390 machine=s390/s390-32 ;;
386 s390x) base_machine=s390 machine=s390/s390-64 ;;
387 sh3*) base_machine=sh machine=sh/sh3 ;;
388 sh4*) base_machine=sh machine=sh/sh4 ;;
390 base_machine=sparc machine=sparc/sparc32 ;;
391 sparcv8 | supersparc | hypersparc)
392 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
393 sparcv8plus | sparcv8plusa | sparcv9)
394 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
395 sparcv8plusb | sparcv9b)
396 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
397 sparc64 | ultrasparc)
398 base_machine=sparc machine=sparc/sparc64 ;;
399 sparc64b | ultrasparc3)
400 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
401 thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
402 *) base_machine=$machine ;;
405 AC_SUBST(base_machine)
407 if test "$base_machine" = "i386"; then
408 AC_DEFINE(USE_REGPARMS)
411 # Compute the list of sysdep directories for this configuration.
412 # This can take a while to compute.
413 sysdep_dir=$srcdir/sysdeps
414 AC_MSG_CHECKING(sysdep dirs)
415 dnl We need to use [ and ] for other purposes for a while now.
417 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
418 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
423 netbsd* | 386bsd* | freebsd* | bsdi*)
424 base_os=unix/bsd/bsd4.4 ;;
425 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
427 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
430 base_os=unix/sysv/irix6/$os ;;
432 base_os=unix/sysv/sysv4 ;;
434 base_os=unix/sysv/hpux/$os ;;
436 base_os=unix/sysv/aix/aix4.3 ;;
438 base_os=standalone ;;
443 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
446 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
450 o=`echo $tail | sed 's/[0-9]*$//'`
451 if test $o != $tail; then
454 # For linux-gnu, try linux-gnu, then linux.
455 o=`echo $tail | sed 's/-.*$//'`
456 if test $o != $tail; then
460 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
463 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
469 # For sparc/sparc32, try sparc/sparc32 and then sparc.
472 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
474 # Prepend the machine's FPU directory unless --without-fp.
475 if test "$with_fp" = yes; then
478 mach="$mach /$1/nofpu"
484 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
487 # Find what sysdep directories exist.
489 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
490 for d in $add_ons_pfx ''; do
491 for b in $base ''; do
492 for m0 in $mach ''; do
493 for v in /$vendor ''; do
494 test "$v" = / && continue
495 for o in /$ostry ''; do
496 test "$o" = / && continue
497 for m in $mach ''; do
498 if test "$m0$b$v$o$m"; then
499 try="${d}sysdeps$m0$b$v$o$m"
500 test -n "$enable_debug_configure" &&
501 echo "$0 [DEBUG]: try $try" >&2
502 if test -d $srcdir/$try; then
503 sysnames="$sysnames $try"
504 { test -n "$o" || test -n "$b"; } && os_used=t
505 { test -n "$m" || test -n "$m0"; } && machine_used=t
516 if test -z "$os_used" && test "$os" != none; then
517 AC_MSG_ERROR(Operating system $os is not supported.)
519 if test -z "$machine_used" && test "$machine" != none; then
520 AC_MSG_ERROR(The $machine is not supported.)
523 # We have now validated the configuration.
526 # If using ELF, look for an `elf' subdirectory of each machine directory.
527 # We prepend these rather than inserting them whereever the machine appears
528 # because things specified by the machine's ELF ABI should override
529 # OS-specific things, and should always be the same for any OS on the
530 # machine (otherwise what's the point of an ABI?).
531 if test "$elf" = yes; then
533 for d in $add_ons_pfx ''; do
535 if test -d $srcdir/${d}sysdeps$m/elf; then
536 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
540 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
544 # Expand the list of system names into a full list of directories
545 # from each element's parent name and Implies file (if present).
548 while test $# -gt 0; do
552 case " $names " in *" $name "*)
553 # Already in the list.
557 # Report each name as we discover it, so there is no long pause in output.
558 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
560 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
564 *) xsrcdir=$srcdir/ ;;
566 test -n "$enable_debug_configure" &&
567 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
569 if test -f $xsrcdir$name/Implies; then
570 # Collect more names from the `Implies' file (removing comments).
571 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
573 for x in $implied_candidate; do
575 if test -d $xsrcdir$name_base/$x; then
576 implied="$implied $name_base/$x";
579 for d in $add_ons_pfx ''; do
583 *) try_srcdir=$srcdir/ ;;
585 test -n "$enable_debug_configure" &&
586 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
587 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
589 implied="$implied $try"
593 if test $found = no; then
594 AC_MSG_WARN($name/Implies specifies nonexistent $x)
601 # Add NAME to the list of names.
604 # Find the parent of NAME, using the empty string if it has none.
606 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
609 # Add the names implied by NAME, and NAME's parent (if it has one), to
610 # the list of names to be processed (the argument list). We prepend the
611 # implied names to the list and append the parent. We want implied
612 # directories to come before further directories inferred from the
613 # configuration components; this ensures that for sysv4, unix/common
614 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
616 sysnames="`echo $implied $* $parent`"
617 test -n "$sysnames" && set $sysnames
620 # Add the default directories.
621 default_sysnames=sysdeps/generic
622 if test "$elf" = yes; then
623 default_sysnames="sysdeps/generic/elf $default_sysnames"
625 sysnames="$names $default_sysnames"
627 # The other names were emitted during the scan.
628 AC_MSG_RESULT($default_sysnames)
634 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
635 # The makefiles need to use a different form to find it in $srcdir.
636 INSTALL='\$(..)./scripts/install-sh -c'
640 # We need the physical current working directory. We cannot use the
641 # "pwd -P" shell builtin since that's not portable. Instead we try to
642 # find a pwd binary. Note that assigning to the PWD environment
643 # variable might have some interesting side effects, so we don't do
645 AC_PATH_PROG(PWD_P, pwd, no)
646 if test "$PWD_P" = no; then
647 AC_MSG_ERROR(*** A pwd binary could not be found.)
650 # These programs are version sensitive.
652 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
653 [version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]*],
654 critic_missing="$critic_missing gcc")
655 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
656 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
657 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
659 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
660 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
661 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
662 MSGFMT=: aux_missing="$aux_missing msgfmt")
663 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
664 [GNU texinfo.* \([0-9][0-9.]*\)],
666 MAKEINFO=: aux_missing="$aux_missing makeinfo")
667 AC_CHECK_PROG_VER(SED, sed, --version,
668 [GNU sed version \([0-9]*\.[0-9.]*\)],
669 [3.0[2-9]*|3.[1-9]*|[4-9]*],
670 SED=: aux_missing="$aux_missing sed")
672 if test "x$with_cvs" != xyes; then
673 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
675 xno|x|x:) AUTOCONF=no ;;
678 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
679 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
680 libc_cv_autoconf_works=yes
682 libc_cv_autoconf_works=no
684 test $libc_cv_autoconf_works = yes || AUTOCONF=no
687 test "x$AUTOCONF" != xno || aux_missing="$aux_missing autoconf"
691 if test $host != $build; then
692 AC_CHECK_PROGS(BUILD_CC, gcc cc)
694 AC_SUBST(cross_compiling)
697 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
699 # Accept binutils 2.13 or newer.
700 AC_CHECK_PROG_VER(AS, $AS, --version,
701 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
702 [2.1[3-9]*], AS=: critic_missing=t)
703 AC_CHECK_PROG_VER(LD, $LD, --version,
704 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
705 [2.1[3-9]*], LD=: critic_missing=t)
707 test -n "$critic_missing" && AC_MSG_ERROR([
708 *** These critical programs are missing or too old:$critic_missing
709 *** Check the INSTALL file for required versions.])
711 test -n "$aux_missing" && AC_MSG_WARN([
712 *** These auxiliary programs are missing or incompatible versions:$aux_missing
713 *** some features will be disabled.
714 *** Check the INSTALL file for required versions.])
716 # glibcbug.in wants to know the compiler version.
717 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
720 # if using special system headers, find out the compiler's sekrit
721 # header directory and add that to the list. NOTE: Only does the right
722 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
723 if test -n "$sysheaders"; then
724 ccheaders=`$CC -print-file-name=include`
725 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
727 AC_SUBST(SYSINCLUDES)
729 # check if ranlib is necessary
730 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
731 cat > conftest.c <<EOF
736 $CC $CFLAGS -c conftest.c
737 $AR cr conftest.a conftest.o
738 cp conftest.a conftest2.a
740 if cmp -s conftest.a conftest2.a; then
741 libc_cv_ranlib_necessary=no
743 libc_cv_ranlib_necessary=yes
746 if test "$libc_cv_ranlib_necessary" = no; then
750 # Test if LD_LIBRARY_PATH contains the notation for the current directory
751 # since this would lead to problems installing/building glibc.
752 # LD_LIBRARY_PATH contains the current directory if one of the following
754 # - one of the terminals (":" and ";") is the first or last sign
755 # - two terminals occur directly after each other
756 # - the path contains an element with a dot in it
757 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
759 case ${LD_LIBRARY_PATH} in
760 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
761 ld_library_path_setting="contains current directory"
764 ld_library_path_setting="ok"
768 AC_MSG_RESULT($ld_library_path_setting)
769 if test "$ld_library_path_setting" != "ok"; then
771 *** LD_LIBRARY_PATH shouldn't contain the current directory when
772 *** building glibc. Please change the environment variable
773 *** and run configure again.])
776 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
777 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
778 libc_cv_gcc_static_libgcc=
780 libc_cv_gcc_static_libgcc=-static-libgcc
782 AC_SUBST(libc_cv_gcc_static_libgcc)
784 AC_PATH_PROG(BASH, bash, no)
785 if test "$BASH" != no &&
786 $BASH -c 'test "$BASH_VERSINFO" \
787 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
788 libc_cv_have_bash2=yes
790 libc_cv_have_bash2=no
792 AC_SUBST(libc_cv_have_bash2)
794 dnl We need a ksh compatible shell for tzselect.
795 if test "$BASH" = no; then
796 AC_PATH_PROG(KSH, ksh, no)
797 if test "$KSH" = no; then
807 AC_SUBST(libc_cv_have_ksh)
810 AC_PATH_PROG(PERL, perl, no)
811 if test "$PERL" != no &&
812 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
815 AC_PATH_PROG(INSTALL_INFO, install-info, no,
816 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
817 if test "$INSTALL_INFO" != "no"; then
818 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
820 # There is a hard ^_ on the next line. I am open to better ideas.
822 echo 'File: dir Node: Top This is the top of the INFO tree'
823 echo '* Menu:') >conftest.d/dir
824 (echo 'INFO-DIR-SECTION i-d-s works'
825 echo 'START-INFO-DIR-ENTRY'
826 echo '* Prog: (prog). Program.'
827 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
828 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AS_MESSAGE_LOG_FD 2>&1
830 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
831 then libc_cv_old_debian_install_info=no
832 else libc_cv_old_debian_install_info=yes
834 else libc_cv_old_debian_install_info=no testfailed=t
837 if test -n "$testfailed"
838 then AC_MSG_WARN([install-info errored out, check config.log])
840 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
842 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
844 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
846 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
847 echo '#include <stddef.h>
848 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
849 if eval "$ac_cpp conftest.c 2>/dev/null" \
850 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
851 libc_cv_signed_size_t=no
853 libc_cv_signed_size_t=yes
856 if test $libc_cv_signed_size_t = yes; then
857 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
858 cat >> confdefs.h <<\EOF
860 #define __SIZE_TYPE__ unsigned
864 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
866 [#define __need_size_t
867 #define __need_wchar_t
870 #include <stddef.h>], [size_t size; wchar_t wchar;
872 #error stddef.h ignored __need_*
874 if (&size == NULL || &wchar == NULL) abort ();],
875 libc_cv_friendly_stddef=yes,
876 libc_cv_friendly_stddef=no)])
877 if test $libc_cv_friendly_stddef = yes; then
878 config_vars="$config_vars
879 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
882 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
883 libc_cv_need_minus_P, [dnl
884 cat > conftest.S <<EOF
885 #include "confdefs.h"
886 /* Nothing whatsoever. */
888 if AC_TRY_COMMAND(${CC-cc} $CFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
889 libc_cv_need_minus_P=no
891 libc_cv_need_minus_P=yes
894 if test $libc_cv_need_minus_P = yes; then
895 config_vars="$config_vars
896 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
899 AC_MSG_CHECKING(whether .text pseudo-op must be used)
900 AC_CACHE_VAL(libc_cv_dot_text, [dnl
901 cat > conftest.s <<EOF
905 if AC_TRY_COMMAND(${CC-cc} $CFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
906 libc_cv_dot_text=.text
909 if test -z "$libc_cv_dot_text"; then
915 AC_CACHE_CHECK(for assembler global-symbol directive,
916 libc_cv_asm_global_directive, [dnl
917 libc_cv_asm_global_directive=UNKNOWN
918 for ac_globl in .globl .global .EXPORT; do
919 cat > conftest.s <<EOF
924 if AC_TRY_COMMAND(${CC-cc} $CFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
925 libc_cv_asm_global_directive=${ac_globl}
928 test $libc_cv_asm_global_directive != UNKNOWN && break
930 if test $libc_cv_asm_global_directive = UNKNOWN; then
931 AC_MSG_ERROR(cannot determine asm global directive)
933 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
936 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
937 cat > conftest.s <<EOF
940 .set glibc_conftest_frobozz,foo
941 $libc_cv_asm_global_directive glibc_conftest_frobozz
943 # The alpha-dec-osf1 assembler gives only a warning for `.set'
944 # (but it doesn't work), so we must do a linking check to be sure.
945 cat > conftest1.c <<\EOF
946 extern int glibc_conftest_frobozz;
947 main () { printf ("%d\n", glibc_conftest_frobozz); }
949 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
950 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
951 libc_cv_asm_set_directive=yes
953 libc_cv_asm_set_directive=no
956 if test $libc_cv_asm_set_directive = yes; then
957 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
960 AC_CACHE_CHECK(for assembler .type directive prefix,
961 libc_cv_asm_type_prefix, [dnl
962 libc_cv_asm_type_prefix=no
963 for ac_try_prefix in '@' '%' '#'; do
964 cat > conftest.s <<EOF
966 ${libc_cv_asm_global_directive} foo
967 .type foo, ${ac_try_prefix}object
972 if AC_TRY_COMMAND(${CC-cc} $CFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
973 libc_cv_asm_type_prefix=${ac_try_prefix}
976 test "x$libc_cv_asm_type_prefix" != xno && break
978 if test "x$libc_cv_asm_type_prefix" != xno; then
979 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
982 # The Aix ld uses global .symbol_names instead of symbol_names.
983 # Unfortunately also used in the PPC64 ELF ABI.
984 case "${os}${machine}" in
985 aix4.3* | linux*powerpc/powerpc64*)
986 AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
989 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
990 [cat > conftest.s <<EOF
993 .symver _sym,sym@VERS
995 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
996 libc_cv_asm_symver_directive=yes
998 libc_cv_asm_symver_directive=no
1001 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1002 if test $libc_cv_asm_symver_directive = yes; then
1003 cat > conftest.s <<EOF
1006 .symver _sym,sym@VERS
1008 cat > conftest.map <<EOF
1017 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1018 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
1019 -nostartfiles -nostdlib
1020 -Wl,--version-script,conftest.map
1021 1>&AS_MESSAGE_LOG_FD]);
1023 libc_cv_ld_version_script_option=yes
1025 libc_cv_ld_version_script_option=no
1028 libc_cv_ld_version_script_option=no
1031 libc_cv_ld_version_script_option=no
1034 if test $shared != no &&
1035 test $libc_cv_asm_symver_directive = yes &&
1036 test $libc_cv_ld_version_script_option = yes &&
1037 test $enable_versioning = yes; then
1039 AC_DEFINE(DO_VERSIONING)
1043 AC_SUBST(VERSIONING)
1045 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1047 *** WARNING: You should not compile GNU libc without versioning. Not using
1048 *** versioning will introduce incompatibilities so that old binaries
1049 *** will not run anymore.
1050 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1052 if test $elf = yes; then
1053 AC_CACHE_CHECK(for .previous assembler directive,
1054 libc_cv_asm_previous_directive, [dnl
1055 cat > conftest.s <<EOF
1056 .section foo_section
1059 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1060 libc_cv_asm_previous_directive=yes
1062 libc_cv_asm_previous_directive=no
1065 if test $libc_cv_asm_previous_directive = yes; then
1066 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1068 AC_CACHE_CHECK(for .popsection assembler directive,
1069 libc_cv_asm_popsection_directive, [dnl
1070 cat > conftest.s <<EOF
1071 .pushsection foo_section
1074 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1075 libc_cv_asm_popsection_directive=yes
1077 libc_cv_asm_popsection_directive=no
1080 if test $libc_cv_asm_popsection_directive = yes; then
1081 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1084 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1085 libc_cv_asm_protected_directive, [dnl
1086 cat > conftest.s <<EOF
1092 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1093 libc_cv_asm_protected_directive=yes
1095 libc_cv_asm_protected_directive=no
1098 AC_SUBST(libc_cv_asm_protected_directive)
1099 AC_DEFINE(HAVE_PROTECTED)
1100 AC_DEFINE(HAVE_HIDDEN)
1102 if test $libc_cv_asm_protected_directive = yes; then
1103 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1104 libc_cv_visibility_attribute,
1105 [cat > conftest.c <<EOF
1106 int foo __attribute__ ((visibility ("hidden"))) = 1;
1107 int bar __attribute__ ((visibility ("protected"))) = 1;
1109 libc_cv_visibility_attribute=no
1110 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1111 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1112 if grep '\.protected.*bar' conftest.s >/dev/null; then
1113 libc_cv_visibility_attribute=yes
1119 if test $libc_cv_visibility_attribute = yes; then
1120 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1124 if test $libc_cv_visibility_attribute = yes; then
1125 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1126 libc_cv_broken_visibility_attribute,
1127 [cat > conftest.c <<EOF
1129 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1130 int bar (int x) { return x; }
1132 libc_cv_broken_visibility_attribute=yes
1133 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
1135 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1137 libc_cv_broken_visibility_attribute=no
1140 rm -f conftest.c conftest.s
1142 if test $libc_cv_broken_visibility_attribute = yes; then
1143 AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
1147 AC_CACHE_CHECK(for broken __attribute__((alias())),
1148 libc_cv_broken_alias_attribute,
1149 [cat > conftest.c <<EOF
1150 extern int foo (int x) __asm ("xyzzy");
1151 int bar (int x) { return x; }
1152 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1154 extern __typeof (dfoo) dfoo __asm ("abccb");
1157 libc_cv_broken_alias_attribute=yes
1158 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1159 if grep 'xyzzy' conftest.s >/dev/null &&
1160 grep 'abccb' conftest.s >/dev/null; then
1161 libc_cv_broken_alias_attribute=no
1164 rm -f conftest.c conftest.s
1166 if test $libc_cv_broken_alias_attribute = yes; then
1167 AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
1170 if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
1171 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1172 libc_cv_have_sdata_section,
1173 [echo "int i;" > conftest.c
1174 libc_cv_have_sdata_section=no
1175 if ${CC-cc} -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1176 | grep '\.sdata' >/dev/null; then
1177 libc_cv_have_sdata_section=yes
1179 rm -f conftest.c conftest.so
1181 if test $libc_cv_have_sdata_section = yes; then
1182 AC_DEFINE(HAVE_SDATA_SECTION)
1186 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1187 libc_cv_initfinit_array, [dnl
1188 cat > conftest.c <<EOF
1189 int _start (void) { return 0; }
1190 int __start (void) { return 0; }
1191 int foo (void) { return 1; }
1192 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1194 if AC_TRY_COMMAND([${CC-cc} -o conftest conftest.c
1195 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1197 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1198 libc_cv_initfinit_array=yes
1200 libc_cv_initfinit_array=no
1203 libc_cv_initfinit_array=no
1206 AC_SUBST(libc_cv_initfinit_array)
1207 if test $libc_cv_initfinit_array = yes; then
1208 AC_DEFINE(HAVE_INITFINI_ARRAY)
1211 AC_CACHE_CHECK(for -z nodelete option,
1212 libc_cv_z_nodelete, [dnl
1213 cat > conftest.c <<EOF
1214 int _start (void) { return 42; }
1216 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1217 -nostartfiles -nostdlib
1218 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1220 libc_cv_z_nodelete=yes
1222 libc_cv_z_nodelete=no
1225 AC_SUBST(libc_cv_z_nodelete)
1227 AC_CACHE_CHECK(for -z nodlopen option,
1228 libc_cv_z_nodlopen, [dnl
1229 cat > conftest.c <<EOF
1230 int _start (void) { return 42; }
1232 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1233 -nostartfiles -nostdlib
1234 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1236 libc_cv_z_nodlopen=yes
1238 libc_cv_z_nodlopen=no
1241 AC_SUBST(libc_cv_z_nodlopen)
1243 AC_CACHE_CHECK(for -z initfirst option,
1244 libc_cv_z_initfirst, [dnl
1245 cat > conftest.c <<EOF
1246 int _start (void) { return 42; }
1248 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1249 -nostartfiles -nostdlib
1250 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1252 libc_cv_z_initfirst=yes
1254 libc_cv_z_initfirst=no
1257 AC_SUBST(libc_cv_z_initfirst)
1259 AC_CACHE_CHECK(for -Bgroup option,
1260 libc_cv_Bgroup, [dnl
1261 cat > conftest.c <<EOF
1262 int _start (void) { return 42; }
1264 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1271 AC_SUBST(libc_cv_Bgroup)
1273 AC_CACHE_CHECK(for -z combreloc,
1274 libc_cv_z_combreloc, [dnl
1275 cat > conftest.c <<EOF
1276 extern int bar (int);
1278 int foo (void) { return bar (mumble); }
1280 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1281 -nostdlib -nostartfiles
1282 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1284 dnl The following test is a bit weak. We must use a tool which can test
1285 dnl cross-platform since the gcc used can be a cross compiler. Without
1286 dnl introducing new options this is not easily doable. Instead use a tool
1287 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1288 dnl look for a section named .rel.dyn.
1289 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1290 libc_cv_z_combreloc=yes
1292 libc_cv_z_combreloc=no
1295 libc_cv_z_combreloc=no
1298 if test "$libc_cv_z_combreloc" = yes; then
1299 AC_DEFINE(HAVE_Z_COMBRELOC)
1302 AC_SUBST(libc_cv_z_combreloc)
1304 if test $elf != yes; then
1305 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1306 [AC_TRY_COMPILE(, [asm (".section .init");
1307 asm (".section .fini");
1308 asm ("${libc_cv_dot_text}");],
1309 libc_cv_have_initfini=yes,
1310 libc_cv_have_initfini=no)])
1311 AC_SUBST(libc_cv_have_initfini)dnl
1312 if test $libc_cv_have_initfini = yes; then
1313 AC_DEFINE(HAVE_INITFINI)
1317 if test $elf = yes -a $gnu_ld = yes; then
1318 AC_CACHE_CHECK(whether cc puts quotes around section names,
1319 libc_cv_have_section_quotes,
1320 [cat > conftest.c <<EOF
1321 static const int foo
1322 __attribute__ ((section ("bar"))) = 1;
1324 if ${CC-cc} -S conftest.c -o conftest.s; then
1325 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1326 libc_cv_have_section_quotes=yes
1328 libc_cv_have_section_quotes=no
1331 libc_cv_have_section_quotes=unknown
1335 if test $libc_cv_have_section_quotes = yes; then
1336 AC_DEFINE(HAVE_SECTION_QUOTES)
1340 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1341 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1342 [cat > conftest.$ac_ext <<EOF
1343 dnl This sometimes fails to find confdefs.h, for some reason.
1344 dnl [#]line __oline__ "[$]0"
1345 [#]line __oline__ "configure"
1346 #include "confdefs.h"
1347 void underscore_test(void) {
1350 if AC_TRY_EVAL(ac_compile); then
1351 if grep _underscore_test conftest* >/dev/null; then
1352 ifelse([$1], , :, [rm -f conftest*
1355 ifelse([$2], , , [rm -f conftest*
1359 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1360 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1361 ifelse([$2], , , [rm -f conftest*
1366 if test $elf = yes; then
1367 libc_cv_asm_underscores=no
1369 if test $ac_cv_prog_cc_works = yes; then
1370 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1371 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1372 libc_cv_asm_underscores=yes,
1373 libc_cv_asm_underscores=no)])
1375 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1376 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1377 libc_cv_asm_underscores=no)])
1380 if test $libc_cv_asm_underscores = no; then
1381 AC_DEFINE(NO_UNDERSCORES)
1384 if test $elf = yes; then
1385 libc_cv_weak_symbols=yes
1388 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1390 cat > conftest.s <<EOF
1392 ${libc_cv_asm_global_directive} foo
1395 .weak bar; bar = foo
1397 if AC_TRY_COMMAND(${CC-cc} $CFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1398 libc_cv_asm_weak_directive=yes
1400 libc_cv_asm_weak_directive=no
1404 if test $libc_cv_asm_weak_directive = no; then
1405 AC_CACHE_CHECK(for assembler .weakext directive,
1406 libc_cv_asm_weakext_directive,
1408 cat > conftest.s <<EOF
1410 ${libc_cv_asm_global_directive} foo
1414 ${libc_cv_asm_global_directive} baz
1417 if AC_TRY_COMMAND(${CC-cc} $CFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1418 libc_cv_asm_weakext_directive=yes
1420 libc_cv_asm_weakext_directive=no
1426 if test $libc_cv_asm_weak_directive = yes; then
1427 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1428 elif test $libc_cv_asm_weakext_directive = yes; then
1429 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1432 dnl The standard hppa assembler uses `;' to start comments and `!'
1433 dnl as a line separator. CRIS uses `;' to start comments and `@' for
1435 case "${host_cpu}-${host_os}" in
1437 libc_cv_asm_line_sep='@'
1438 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1441 AC_CACHE_CHECK(for assembler line separator,
1442 libc_cv_asm_line_sep, [dnl
1443 cat > conftest.s <<EOF
1446 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1447 libc_cv_asm_line_sep='!'
1449 if test -z "$enable_hacker_mode"; then
1450 echo "*** You need a newer assembler to compile glibc"
1454 libc_cv_asm_line_sep=';'
1457 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1461 AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
1462 libc_cv_cpp_asm_debuginfo, [dnl
1463 cat > conftest.S <<EOF
1464 #include "confdefs.h"
1469 ${libc_cv_asm_global_directive} foo
1471 /* Unfortunately this test only works for a real instruction,
1472 not for any of the machine-independent pseudo-ops.
1473 So we just have to assume everybody has a "nop". */
1480 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) &&
1481 ac_pattern='conftest\.S'
1482 AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
1483 grep $ac_pattern 1>&AS_MESSAGE_LOG_FD]); then
1484 libc_cv_cpp_asm_debuginfo=yes
1486 libc_cv_cpp_asm_debuginfo=no
1488 rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
1489 if test $libc_cv_cpp_asm_debuginfo = yes; then
1490 AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
1493 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1494 cat > conftest.c <<\EOF
1499 dnl No \ in command here because it ends up inside ''.
1500 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1501 -nostdlib -nostartfiles -Wl,--no-whole-archive
1502 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1503 libc_cv_ld_no_whole_archive=yes
1505 libc_cv_ld_no_whole_archive=no
1508 if test $libc_cv_ld_no_whole_archive = yes; then
1509 no_whole_archive=-Wl,--no-whole-archive
1511 AC_SUBST(no_whole_archive)dnl
1513 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1514 cat > conftest.c <<\EOF
1519 dnl No \ in command here because it ends up inside ''.
1520 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1521 -nostdlib -nostartfiles -fexceptions
1522 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1523 libc_cv_gcc_exceptions=yes
1525 libc_cv_gcc_exceptions=no
1528 if test $libc_cv_gcc_exceptions = yes; then
1529 exceptions=-fexceptions
1531 AC_SUBST(exceptions)dnl
1533 if test "$host_cpu" = powerpc ; then
1534 # Check for a bug present in at least versions 2.8.x of GCC
1535 # and versions 1.0.x of EGCS.
1536 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1537 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1538 libc_cv_c_asmcr0_bug='no',
1539 libc_cv_c_asmcr0_bug='yes')])
1540 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1541 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1545 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1546 [cat > conftest.c <<EOF
1547 #line __oline__ "configure"
1548 static char *__EH_FRAME_BEGIN__;
1551 #ifdef CHECK__register_frame
1552 __register_frame (__EH_FRAME_BEGIN__);
1553 __deregister_frame (__EH_FRAME_BEGIN__);
1555 #ifdef CHECK__register_frame_info
1556 __register_frame_info (__EH_FRAME_BEGIN__);
1557 __deregister_frame_info (__EH_FRAME_BEGIN__);
1562 /* FIXME: this is fragile. */
1571 dl_iterate_phdr () {}
1573 dnl No \ in command here because it ends up inside ''.
1574 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1575 -nostdlib -nostartfiles
1576 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1577 libc_cv_gcc_dwarf2_unwind_info=static
1579 libc_cv_gcc_dwarf2_unwind_info=no
1581 # Some platforms' specs put -lgcc first. The second one doesn't hurt.
1582 libc_unwind_check="${CC-cc} $CFLAGS -DCHECK__register_frame_info \
1583 -nostdlib -nostartfiles -o conftest conftest.c \
1584 -lgcc -lgcc_eh -lgcc"
1585 if AC_TRY_COMMAND([$libc_unwind_check >&AS_MESSAGE_LOG_FD]); then
1586 if $libc_unwind_check -v 2>&1 >/dev/null \
1587 | grep -q -- --eh-frame-hdr; then
1588 libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
1590 libc_cv_gcc_dwarf2_unwind_info=static
1593 libc_cv_gcc_dwarf2_unwind_info=no
1595 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1596 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1597 -nostdlib -nostartfiles
1598 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1599 libc_cv_gcc_dwarf2_unwind_info=yes
1601 libc_cv_gcc_dwarf2_unwind_info=no
1605 case $libc_cv_gcc_dwarf2_unwind_info in
1607 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1610 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1611 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1615 dnl Check whether compiler understands __builtin_expect.
1616 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1617 [cat > conftest.c <<EOF
1618 #line __oline__ "configure"
1621 a = __builtin_expect (a, 10);
1622 return a == 10 ? 0 : 1;
1625 dnl No \ in command here because it ends up inside ''.
1626 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1627 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1628 libc_cv_gcc_builtin_expect=yes
1630 libc_cv_gcc_builtin_expect=no
1633 if test "$libc_cv_gcc_builtin_expect" = yes; then
1634 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1637 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1638 cat > conftest.c <<\EOF
1641 __builtin_memset (x, 0, 1000);
1645 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1647 libc_cv_gcc_builtin_memset=no
1649 libc_cv_gcc_builtin_memset=yes
1652 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1653 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1656 dnl Check whether the compiler supports subtraction of local labels.
1657 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1658 [cat > conftest.c <<EOF
1660 #line __oline__ "configure"
1663 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1664 void *p = &&l1 + ar[a];
1673 dnl No \ in command here because it ends up inside ''.
1674 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1675 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1676 libc_cv_gcc_subtract_local_labels=yes
1678 libc_cv_gcc_subtract_local_labels=no
1681 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1682 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1685 dnl Check whether the compiler supports the __thread keyword.
1686 if test "x$use__thread" != xno; then
1687 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1688 [cat > conftest.c <<\EOF
1689 __thread int a = 42;
1691 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1692 libc_cv_gcc___thread=yes
1694 libc_cv_gcc___thread=no
1697 if test "$libc_cv_gcc___thread" = yes; then
1698 AC_DEFINE(HAVE___THREAD)
1701 libc_cv_gcc___thread=no
1704 if test "$libc_cv_gcc___thread" = yes; then
1705 dnl Check whether the compiler supports the tls_model attribute.
1706 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1707 cat > conftest.c <<\EOF
1708 extern __thread int a __attribute__((tls_model ("initial-exec")));
1710 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1711 libc_cv_gcc_tls_model_attr=yes
1713 libc_cv_gcc_tls_model_attr=no
1716 if test "$libc_cv_gcc_tls_model_attr" = yes; then
1717 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
1721 dnl Check whether we have the gd library available.
1722 AC_MSG_CHECKING(for libgd)
1723 if test "$with_gd" != "no"; then
1724 old_CFLAGS="$CFLAGS"
1725 CFLAGS="$CFLAGS $libgd_include"
1726 old_LDFLAGS="$LDFLAGS"
1727 LDFLAGS="$LDFLAGS $libgd_ldflags"
1729 LIBS="$LIBS -lgd -lpng -lz -lm"
1730 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1731 CFLAGS="$old_CFLAGS"
1732 LDFLAGS="$old_LDFLAGS"
1737 AC_MSG_RESULT($LIBGD)
1740 dnl check for the size of 'long double'.
1741 AC_CHECK_SIZEOF(long double, 0)
1742 sizeof_long_double=$ac_cv_sizeof_long_double
1743 AC_SUBST(sizeof_long_double)
1745 ### End of automated tests.
1746 ### Now run sysdeps configure fragments.
1748 # They also can set these variables.
1750 ldd_rewrite_script=no
1751 libc_cv_sysconfdir=$sysconfdir
1752 libc_cv_gcc_unwind_find_fde=no
1754 # Iterate over all the sysdep directories we will use, running their
1755 # configure fragments, and looking for a uname implementation.
1757 for dir in $sysnames; do
1760 *) dest=$srcdir/$dir ;;
1762 if test -r $dest/configure; then
1763 AC_MSG_RESULT(running configure fragment for $dir)
1767 if test -z "$uname"; then
1768 if test -r $dest/uname.c ||
1769 test -r $dest/uname.S ||
1770 { test -r $dest/syscalls.list &&
1771 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1778 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
1779 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
1781 AC_SUBST(libc_cv_gcc_unwind_find_fde)
1783 # If we will use the generic uname implementation, we must figure out what
1784 # it will say by examining the system, and write the results in config-name.h.
1785 if test "$uname" = "sysdeps/generic"; then
1788 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1790 if test $uname_sysname != $config_os; then
1791 config_release=`echo $config_os | sed s/$uname_sysname//`
1794 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1795 if test -r /vmunix; then
1796 kernel_id=`strings /vmunix | grep UNIX`
1797 elif test -r /dynix; then
1798 kernel_id=`strings /dynix | grep DYNIX`
1804 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1807 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1809 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1810 != x$config_release; then
1811 # The configuration release is a substring of the kernel release.
1812 libc_cv_uname_release=$kernel_release
1813 elif test x$config_release != x; then
1814 libc_cv_uname_release=$config_release
1815 elif test x$kernel_release != x; then
1816 libc_cv_uname_release=$kernel_release
1818 libc_cv_uname_release=unknown
1820 uname_release="$libc_cv_uname_release"
1822 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1825 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1827 if test -n "$kernel_version"; then
1828 libc_cv_uname_version="$kernel_version"
1830 libc_cv_uname_version=unknown
1832 uname_version="$libc_cv_uname_version"
1834 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1835 config_uname=config-name.h:config-name.in
1837 # For non-generic uname, we don't need to create config-name.h at all.
1841 dnl This is tested by existing code and it's simpler to avoid changing it.
1842 AC_DEFINE(USE_IN_LIBIO)
1844 # Test for old glibc 2.0.x headers so that they can be removed properly
1845 # Search only in includedir.
1846 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1847 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1849 old_glibc_headers=yes
1851 old_glibc_headers=no
1853 AC_MSG_RESULT($old_glibc_headers)
1854 if test ${old_glibc_headers} = yes; then
1855 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1856 AC_MSG_WARN(*** be removed.)
1858 AC_SUBST(old_glibc_headers)
1860 AC_SUBST(libc_cv_slibdir)
1861 AC_SUBST(libc_cv_localedir)
1862 AC_SUBST(libc_cv_sysconfdir)
1863 AC_SUBST(libc_cv_rootsbindir)
1865 AC_SUBST(use_ldconfig)
1866 AC_SUBST(ldd_rewrite_script)
1868 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
1869 if test $gnu_ld = yes; then
1870 AC_DEFINE(HAVE_GNU_LD)
1872 if test $gnu_as = yes; then
1873 AC_DEFINE(HAVE_GNU_AS)
1875 if test $elf = yes; then
1878 if test $xcoff = yes; then
1879 AC_DEFINE(HAVE_XCOFF)
1884 if test $shared = default; then
1885 if test $gnu_ld = yes; then
1888 # For now we do not assume shared libs are available. In future more
1889 # tests might become available.
1894 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1896 cat > conftest.c <<EOF
1897 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1898 # error PIC is default.
1901 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
1905 AC_SUBST(pic_default)
1910 AC_SUBST(static_nss)
1911 AC_SUBST(nopic_initfini)
1916 *door*) linux_doors=yes ;;
1917 *) linux_doors=no ;;
1919 AC_SUBST(linux_doors)
1921 dnl See sysdeps/mach/configure.in for this variable.
1922 AC_SUBST(mach_interface_list)
1924 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1927 config_makefile=Makefile
1930 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1931 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1935 AC_CONFIG_FILES([config.make glibcbug ${config_makefile} ${config_uname}])
1936 AC_CONFIG_COMMANDS([default],[[
1937 case $CONFIG_FILES in *config.make*)
1938 echo "$config_vars" >> config.make;;
1940 test -d bits || mkdir bits]],[[config_vars='$config_vars']])