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=$enableval],
116 AC_SUBST(enable_check_abi)
117 AC_ARG_ENABLE([check-abi],
118 AC_HELP_STRING([--enable-check-abi],
119 [do "make check-abi" in "make check" (no/warn/yes)
120 @<:@default=no@:>@]),
121 [enable_check_abi=$enableval],
122 [enable_check_abi=no])
124 dnl Arguments to enable or disable building the static, shared, profiled,
125 dnl and -fomit-frame-pointer libraries.
126 dnl I've disabled this for now since we cannot build glibc without static
127 dnl libraries built in the moment.
128 dnl AC_ARG_ENABLE([static],
129 dnl AC_HELP_STRING([--enable-static],
130 dnl [build static library @<:@default=yes@:>@]),
131 dnl [static=$enableval],
134 AC_ARG_ENABLE([shared],
135 AC_HELP_STRING([--enable-shared],
136 [build shared library @<:@default=yes if GNU ld & ELF@:>@]),
139 AC_ARG_ENABLE([profile],
140 AC_HELP_STRING([--enable-profile],
141 [build profiled library @<:@default=yes@:>@]),
142 [profile=$enableval],
144 AC_ARG_ENABLE([omitfp],
145 AC_HELP_STRING([--enable-omitfp],
146 [build undebuggable optimized library @<:@default=no@:>@]),
149 AC_ARG_ENABLE([bounded],
150 AC_HELP_STRING([--enable-bounded],
151 [build with runtime bounds checking @<:@default=no@:>@]),
152 [bounded=$enableval],
154 AC_ARG_ENABLE([versioning],
155 AC_HELP_STRING([--disable-versioning],
156 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
157 [enable_versioning=$enableval],
158 [enable_versioning=yes])
160 AC_ARG_ENABLE([oldest-abi],
161 AC_HELP_STRING([--enable-oldest-abi=ABI],
162 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
163 [oldest_abi=$enableval],
165 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
168 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
172 dnl Generic infrastructure for drop-in additions to libc.
173 AC_ARG_ENABLE([add-ons],
174 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
175 [configure and build add-ons in DIR1,DIR2,... search for add-ons if no parameter given]),
176 [case "$enableval" in
177 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
178 test "$add_ons" = "*" && add_ons= ;;
179 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
183 dnl Let the user avoid using TLS. Don't know why but...
184 dnl XXX For now we disable support by default.
186 AC_HELP_STRING([--with-tls],
187 [enable support for TLS]),
191 AC_ARG_WITH([__thread],
192 AC_HELP_STRING([--without-__thread],
193 [do not use TLS features even when supporting them]),
194 [use__thread=$withval],
197 AC_ARG_ENABLE([hidden-plt],
198 AC_HELP_STRING([--disable-hidden-plt],
199 [do not hide internal function calls to avoid PLT]),
202 if test "x$hidden" = xno; then
206 AC_CONFIG_SUBDIRS([ ])dnl Bonehead new Autoconf whines if we do it cleanly.
208 if test x"$add_ons" != x; then
209 for f in $add_ons; do
211 if test "$f" = "crypt"; then
213 *** It seems that you're using an old \`crypt' add-on. crypt is now
214 *** part of glibc and using the old add-on will not work with this
215 *** release. Start again with fresh sources and without the old
216 *** \`crypt' add-on.])
218 if test "$f" = "localedata"; then
220 *** It seems that you're using an old \`localedata' add-on. localedata
221 *** is now part of glibc and using the old add-on will not work with
222 *** this release. Start again with fresh sources and without the old
223 *** \`localedata' add-on.])
225 # Test whether such a subdir really exists.
226 if test -d $srcdir/$f; then
227 add_ons_pfx="$add_ons_pfx $f/"
228 dnl This variable is what AC_CONFIG_SUBDIRS is supposed to set,
229 dnl but the new Autoconf maintainers don't care about compatibility
230 dnl so we cannot use it normally any more without complaints.
231 subdirs="$subdirs $f"
233 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
238 dnl On some platforms we cannot use dynamic loading. We must provide
239 dnl static NSS modules.
240 AC_ARG_ENABLE([static-nss],
241 AC_HELP_STRING([--enable-static-nss],
242 [build static NSS modules @<:@default=no@:>@]),
243 [static_nss=$enableval],
245 dnl Enable static NSS also if we build no shared objects.
246 if test x"$static_nss" = xyes || test x"$shared" = xno; then
248 AC_DEFINE(DO_STATIC_NSS)
251 AC_ARG_ENABLE([force-install],
252 AC_HELP_STRING([--disable-force-install],
253 [don't force installation of files from this package, even if they are older than the installed files]),
254 [force_install=$enableval],
256 AC_SUBST(force_install)
258 dnl On some platforms we allow dropping compatibility with all kernel
260 AC_ARG_ENABLE([kernel],
261 AC_HELP_STRING([--enable-kernel=VERSION],
262 [compile for compatibility with kernel not older than VERSION]),
263 [minimum_kernel=$enableval],
265 dnl Prevent unreasonable values.
266 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
267 # Better nothing than this.
270 if test "$minimum_kernel" = current; then
271 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
275 dnl For the development we sometimes want gcc to issue even more warnings.
276 dnl This is not the default since many of the extra warnings are not
278 AC_ARG_ENABLE([all-warnings],
279 AC_HELP_STRING([--enable-all-warnings],
280 [enable all useful warnings gcc can issue]),
281 [all_warnings=$enableval],
283 AC_SUBST(all_warnings)
287 # The way shlib-versions is used to generate soversions.mk uses a
288 # fairly simplistic model for name recognition that can't distinguish
289 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
290 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
291 # tell. This doesn't get used much beyond that, so it's fairly safe.
296 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
300 # We keep the original values in `$config_*' and never modify them, so we
301 # can write them unchanged into config.make. Everything else uses
302 # $machine, $vendor, and $os, and changes them whenever convenient.
303 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
305 # Don't allow vendor == "unknown"
306 test "$config_vendor" = unknown && config_vendor=
307 config_os="`echo $config_os | sed 's/^unknown-//'`"
309 # Some configurations imply other options.
311 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
312 # These systems always use GNU tools.
313 gnu_ld=yes gnu_as=yes ;;
316 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
317 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
319 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
320 # These systems (almost) always use the ELF format.
324 # These systems are always xcoff
330 machine=$config_machine
331 vendor=$config_vendor
334 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
336 if test "$machine" = rs6000; then
340 # Braindead PowerPC box with absolutely no FPU.
341 case "$machine-$host_os" in
348 ### I put this here to prevent those annoying emails from people who cannot
349 ### read and try to compile glibc on unsupported platforms. --drepper
351 ### By using the undocumented --enable-hacker-mode option for configure
352 ### one can skip this test to make the configuration not fail for unsupported
355 if test -z "$enable_hacker_mode"; then
356 case "$machine-$host_os" in
357 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
360 echo "*** The GNU C library is currently not available for this platform."
361 echo "*** So far nobody cared to port it and if there is no volunteer it"
362 echo "*** might never happen. So, if you have interest to see glibc on"
363 echo "*** this platform visit"
364 echo "*** http://www.gnu.org/software/libc/porting.html"
365 echo "*** and join the group of porters"
371 dnl We need to use [ and ] for other purposes for a while now.
373 # Expand the configuration machine name into a subdirectory by architecture
374 # type and particular chip.
376 a29k | am29000) base_machine=a29k machine=a29k ;;
377 alpha*) base_machine=alpha machine=alpha/$machine ;;
378 arm*) base_machine=arm machine=arm/arm32/$machine ;;
379 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
380 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
381 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
382 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
383 i[3456]86) base_machine=i386 machine=i386/$machine ;;
384 ia64) base_machine=ia64 machine=ia64 ;;
385 m680?0) base_machine=m68k machine=m68k/$machine ;;
386 m68k) base_machine=m68k machine=m68k/m68020 ;;
387 m88???) base_machine=m88k machine=m88k/$machine ;;
388 m88k) base_machine=m88k machine=m88k/m88100 ;;
389 mips64*) base_machine=mips64
390 case "$CC $CFLAGS $CPPFLAGS " in
391 *" -mabi=n32 "*) mips_cc_abi=n32 ;;
392 *" -mabi=64 "*|*" -mabi=n64 "*) mips_cc_abi=64 ;;
393 *" -mabi=32 "*|*" -mabi=o32 "*) mips_cc_abi=32 ;;
394 *) mips_cc_abi=default ;;
397 *abin32*) mips_config_abi=n32 ;;
398 *abi64*|*abin64*) mips_config_abi=64 ;;
399 *abi32*|*abio32*) mips_config_abi=32 ;;
400 *) mips_config_abi=$mips_cc_abi ;;
402 case $mips_config_abi in
403 default) machine=mips/mips64/n32 mips_config_abi=n32 ;;
404 n32) machine=mips/mips64/n32 ;;
405 64) machine=mips/mips64/n64 ;;
406 32) machine=mips/mips32/kern64 ;;
408 machine=$machine/$config_machine
409 if test $mips_config_abi != $mips_cc_abi; then
410 # This won't make it to config.make, but we want to
411 # set this in case configure tests depend on it.
412 CPPFLAGS="$CPPFLAGS -mabi=$mips_config_abi"
415 mips*) base_machine=mips machine=mips/mips32/$machine ;;
416 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
417 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
418 s390) base_machine=s390 machine=s390/s390-32 ;;
419 s390x) base_machine=s390 machine=s390/s390-64 ;;
420 sh3*) base_machine=sh machine=sh/sh3 ;;
421 sh4*) base_machine=sh machine=sh/sh4 ;;
423 base_machine=sparc machine=sparc/sparc32 ;;
424 sparcv8 | supersparc | hypersparc)
425 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
426 sparcv8plus | sparcv8plusa | sparcv9)
427 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
428 sparcv8plusb | sparcv9b)
429 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
430 sparc64 | ultrasparc)
431 base_machine=sparc machine=sparc/sparc64 ;;
432 sparc64b | ultrasparc3)
433 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
434 thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
435 *) base_machine=$machine ;;
438 AC_SUBST(base_machine)
440 if test "$base_machine" = "i386"; then
441 AC_DEFINE(USE_REGPARMS)
444 # Compute the list of sysdep directories for this configuration.
445 # This can take a while to compute.
446 sysdep_dir=$srcdir/sysdeps
447 AC_MSG_CHECKING(sysdep dirs)
448 dnl We need to use [ and ] for other purposes for a while now.
450 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
451 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
456 netbsd* | 386bsd* | freebsd* | bsdi*)
457 base_os=unix/bsd/bsd4.4 ;;
458 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
460 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
463 base_os=unix/sysv/irix6/$os ;;
465 base_os=unix/sysv/sysv4 ;;
467 base_os=unix/sysv/hpux/$os ;;
469 base_os=unix/sysv/aix/aix4.3 ;;
471 base_os=standalone ;;
476 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
479 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
483 o=`echo $tail | sed 's/[0-9]*$//'`
484 if test $o != $tail; then
487 # For linux-gnu, try linux-gnu, then linux.
488 o=`echo $tail | sed 's/-.*$//'`
489 if test $o != $tail; then
493 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
496 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
502 # For sparc/sparc32, try sparc/sparc32 and then sparc.
505 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
507 # Prepend the machine's FPU directory unless --without-fp.
508 if test "$with_fp" = yes; then
511 mach="$mach /$1/nofpu"
517 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
520 # Find what sysdep directories exist.
522 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
523 for d in $add_ons_pfx ''; do
524 for b in $base ''; do
525 for m0 in $mach ''; do
526 for v in /$vendor ''; do
527 test "$v" = / && continue
528 for o in /$ostry ''; do
529 test "$o" = / && continue
530 for m in $mach ''; do
531 if test "$m0$b$v$o$m"; then
532 try="${d}sysdeps$m0$b$v$o$m"
533 test -n "$enable_debug_configure" &&
534 echo "$0 [DEBUG]: try $try" >&2
535 if test -d $srcdir/$try; then
536 sysnames="$sysnames $try"
537 { test -n "$o" || test -n "$b"; } && os_used=t
538 { test -n "$m" || test -n "$m0"; } && machine_used=t
549 if test -z "$os_used" && test "$os" != none; then
550 AC_MSG_ERROR(Operating system $os is not supported.)
552 if test -z "$machine_used" && test "$machine" != none; then
553 AC_MSG_ERROR(The $machine is not supported.)
556 # We have now validated the configuration.
559 # If using ELF, look for an `elf' subdirectory of each machine directory.
560 # We prepend these rather than inserting them whereever the machine appears
561 # because things specified by the machine's ELF ABI should override
562 # OS-specific things, and should always be the same for any OS on the
563 # machine (otherwise what's the point of an ABI?).
564 if test "$elf" = yes; then
566 for d in $add_ons_pfx ''; do
568 if test -d $srcdir/${d}sysdeps$m/elf; then
569 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
573 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
577 # Expand the list of system names into a full list of directories
578 # from each element's parent name and Implies file (if present).
581 while test $# -gt 0; do
585 case " $names " in *" $name "*)
586 # Already in the list.
590 # Report each name as we discover it, so there is no long pause in output.
591 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
593 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
597 *) xsrcdir=$srcdir/ ;;
599 test -n "$enable_debug_configure" &&
600 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
602 if test -f $xsrcdir$name/Implies; then
603 # Collect more names from the `Implies' file (removing comments).
604 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
606 for x in $implied_candidate; do
608 if test -d $xsrcdir$name_base/$x; then
609 implied="$implied $name_base/$x";
612 for d in $add_ons_pfx ''; do
616 *) try_srcdir=$srcdir/ ;;
618 test -n "$enable_debug_configure" &&
619 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
620 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
622 implied="$implied $try"
626 if test $found = no; then
627 AC_MSG_WARN($name/Implies specifies nonexistent $x)
634 # Add NAME to the list of names.
637 # Find the parent of NAME, using the empty string if it has none.
639 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
642 # Add the names implied by NAME, and NAME's parent (if it has one), to
643 # the list of names to be processed (the argument list). We prepend the
644 # implied names to the list and append the parent. We want implied
645 # directories to come before further directories inferred from the
646 # configuration components; this ensures that for sysv4, unix/common
647 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
649 sysnames="`echo $implied $* $parent`"
650 test -n "$sysnames" && set $sysnames
653 # Add the default directories.
654 default_sysnames=sysdeps/generic
655 if test "$elf" = yes; then
656 default_sysnames="sysdeps/generic/elf $default_sysnames"
658 sysnames="$names $default_sysnames"
660 # The other names were emitted during the scan.
661 AC_MSG_RESULT($default_sysnames)
667 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
668 # The makefiles need to use a different form to find it in $srcdir.
669 INSTALL='\$(..)./scripts/install-sh -c'
674 if test $host != $build; then
675 AC_CHECK_PROGS(BUILD_CC, gcc cc)
677 AC_SUBST(cross_compiling)
679 # We need the C++ compiler only for testing.
682 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
684 # Accept binutils 2.13 or newer.
685 AC_CHECK_PROG_VER(AS, $AS, --version,
686 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
687 [2.1[3-9]*], AS=: critic_missing="$critic_missing as")
688 AC_CHECK_PROG_VER(LD, $LD, --version,
689 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
690 [2.1[3-9]*], LD=: critic_missing="$critic_missing ld")
692 # We need the physical current working directory. We cannot use the
693 # "pwd -P" shell builtin since that's not portable. Instead we try to
694 # find a pwd binary. Note that assigning to the PWD environment
695 # variable might have some interesting side effects, so we don't do
697 AC_PATH_PROG(PWD_P, pwd, no)
698 if test "$PWD_P" = no; then
699 AC_MSG_ERROR(*** A pwd binary could not be found.)
702 # These programs are version sensitive.
704 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
705 [version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]*],
706 critic_missing="$critic_missing gcc")
707 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
708 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
709 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
711 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
712 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
713 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
714 MSGFMT=: aux_missing="$aux_missing msgfmt")
715 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
716 [GNU texinfo.* \([0-9][0-9.]*\)],
718 MAKEINFO=: aux_missing="$aux_missing makeinfo")
719 AC_CHECK_PROG_VER(SED, sed, --version,
720 [GNU sed version \([0-9]*\.[0-9.]*\)],
721 [3.0[2-9]*|3.[1-9]*|[4-9]*],
722 SED=: aux_missing="$aux_missing sed")
724 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
726 xno|x|x:) AUTOCONF=no ;;
729 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
730 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
731 libc_cv_autoconf_works=yes
733 libc_cv_autoconf_works=no
735 test $libc_cv_autoconf_works = yes || AUTOCONF=no
738 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
739 # If --without-cvs they probably won't change configure.in, so no complaints.
740 aux_missing="$aux_missing autoconf"
743 test -n "$critic_missing" && AC_MSG_ERROR([
744 *** These critical programs are missing or too old:$critic_missing
745 *** Check the INSTALL file for required versions.])
747 test -n "$aux_missing" && AC_MSG_WARN([
748 *** These auxiliary programs are missing or incompatible versions:$aux_missing
749 *** some features will be disabled.
750 *** Check the INSTALL file for required versions.])
752 # glibcbug.in wants to know the compiler version.
753 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
756 # if using special system headers, find out the compiler's sekrit
757 # header directory and add that to the list. NOTE: Only does the right
758 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
759 if test -n "$sysheaders"; then
760 ccheaders=`$CC -print-file-name=include`
761 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
763 AC_SUBST(SYSINCLUDES)
765 # check if ranlib is necessary
766 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
767 cat > conftest.c <<EOF
772 $CC $CFLAGS $CPPFLAGS -c conftest.c
773 $AR cr conftest.a conftest.o
774 cp conftest.a conftest2.a
776 if cmp -s conftest.a conftest2.a; then
777 libc_cv_ranlib_necessary=no
779 libc_cv_ranlib_necessary=yes
782 if test "$libc_cv_ranlib_necessary" = no; then
786 # Test if LD_LIBRARY_PATH contains the notation for the current directory
787 # since this would lead to problems installing/building glibc.
788 # LD_LIBRARY_PATH contains the current directory if one of the following
790 # - one of the terminals (":" and ";") is the first or last sign
791 # - two terminals occur directly after each other
792 # - the path contains an element with a dot in it
793 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
795 case ${LD_LIBRARY_PATH} in
796 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
797 ld_library_path_setting="contains current directory"
800 ld_library_path_setting="ok"
804 AC_MSG_RESULT($ld_library_path_setting)
805 if test "$ld_library_path_setting" != "ok"; then
807 *** LD_LIBRARY_PATH shouldn't contain the current directory when
808 *** building glibc. Please change the environment variable
809 *** and run configure again.])
812 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
813 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
814 libc_cv_gcc_static_libgcc=
816 libc_cv_gcc_static_libgcc=-static-libgcc
818 AC_SUBST(libc_cv_gcc_static_libgcc)
820 AC_PATH_PROG(BASH, bash, no)
821 if test "$BASH" != no &&
822 $BASH -c 'test "$BASH_VERSINFO" \
823 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
824 libc_cv_have_bash2=yes
826 libc_cv_have_bash2=no
828 AC_SUBST(libc_cv_have_bash2)
830 dnl We need a ksh compatible shell for tzselect.
831 if test "$BASH" = no; then
832 AC_PATH_PROG(KSH, ksh, no)
833 if test "$KSH" = no; then
843 AC_SUBST(libc_cv_have_ksh)
846 AC_PATH_PROG(PERL, perl, no)
847 if test "$PERL" != no &&
848 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
851 AC_PATH_PROG(INSTALL_INFO, install-info, no,
852 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
853 if test "$INSTALL_INFO" != "no"; then
854 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
856 # There is a hard ^_ on the next line. I am open to better ideas.
858 echo 'File: dir Node: Top This is the top of the INFO tree'
859 echo '* Menu:') >conftest.d/dir
860 (echo 'INFO-DIR-SECTION i-d-s works'
861 echo 'START-INFO-DIR-ENTRY'
862 echo '* Prog: (prog). Program.'
863 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
864 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AS_MESSAGE_LOG_FD 2>&1
866 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
867 then libc_cv_old_debian_install_info=no
868 else libc_cv_old_debian_install_info=yes
870 else libc_cv_old_debian_install_info=no testfailed=t
873 if test -n "$testfailed"
874 then AC_MSG_WARN([install-info errored out, check config.log])
876 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
878 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
880 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
882 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
883 echo '#include <stddef.h>
884 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
885 if eval "$ac_cpp conftest.c 2>/dev/null" \
886 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
887 libc_cv_signed_size_t=no
889 libc_cv_signed_size_t=yes
892 if test $libc_cv_signed_size_t = yes; then
893 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
894 cat >> confdefs.h <<\EOF
896 #define __SIZE_TYPE__ unsigned
900 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
902 [#define __need_size_t
903 #define __need_wchar_t
906 #include <stddef.h>], [size_t size; wchar_t wchar;
908 #error stddef.h ignored __need_*
910 if (&size == NULL || &wchar == NULL) abort ();],
911 libc_cv_friendly_stddef=yes,
912 libc_cv_friendly_stddef=no)])
913 if test $libc_cv_friendly_stddef = yes; then
914 config_vars="$config_vars
915 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
918 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
919 libc_cv_need_minus_P, [dnl
920 cat > conftest.S <<EOF
921 #include "confdefs.h"
922 /* Nothing whatsoever. */
924 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
925 libc_cv_need_minus_P=no
927 libc_cv_need_minus_P=yes
930 if test $libc_cv_need_minus_P = yes; then
931 config_vars="$config_vars
932 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
935 AC_MSG_CHECKING(whether .text pseudo-op must be used)
936 AC_CACHE_VAL(libc_cv_dot_text, [dnl
937 cat > conftest.s <<EOF
941 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
942 libc_cv_dot_text=.text
945 if test -z "$libc_cv_dot_text"; then
951 AC_CACHE_CHECK(for assembler global-symbol directive,
952 libc_cv_asm_global_directive, [dnl
953 libc_cv_asm_global_directive=UNKNOWN
954 for ac_globl in .globl .global .EXPORT; do
955 cat > conftest.s <<EOF
960 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
961 libc_cv_asm_global_directive=${ac_globl}
964 test $libc_cv_asm_global_directive != UNKNOWN && break
966 if test $libc_cv_asm_global_directive = UNKNOWN; then
967 AC_MSG_ERROR(cannot determine asm global directive)
969 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
972 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
973 cat > conftest.s <<EOF
976 .set glibc_conftest_frobozz,foo
977 $libc_cv_asm_global_directive glibc_conftest_frobozz
979 # The alpha-dec-osf1 assembler gives only a warning for `.set'
980 # (but it doesn't work), so we must do a linking check to be sure.
981 cat > conftest1.c <<\EOF
982 extern int glibc_conftest_frobozz;
983 void _start() { glibc_conftest_frobozz = 1; }
985 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
986 -nostartfiles -nostdlib \
987 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
988 libc_cv_asm_set_directive=yes
990 libc_cv_asm_set_directive=no
993 if test $libc_cv_asm_set_directive = yes; then
994 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
997 AC_CACHE_CHECK(for assembler .type directive prefix,
998 libc_cv_asm_type_prefix, [dnl
999 libc_cv_asm_type_prefix=no
1000 for ac_try_prefix in '@' '%' '#'; do
1001 cat > conftest.s <<EOF
1003 ${libc_cv_asm_global_directive} foo
1004 .type foo, ${ac_try_prefix}object
1009 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1010 libc_cv_asm_type_prefix=${ac_try_prefix}
1013 test "x$libc_cv_asm_type_prefix" != xno && break
1015 if test "x$libc_cv_asm_type_prefix" != xno; then
1016 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
1019 # The Aix ld uses global .symbol_names instead of symbol_names.
1020 # Unfortunately also used in the PPC64 ELF ABI.
1021 case "${os}${machine}" in
1022 aix4.3* | linux*powerpc/powerpc64*)
1023 AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
1026 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1027 [cat > conftest.s <<EOF
1030 .symver _sym,sym@VERS
1032 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1033 libc_cv_asm_symver_directive=yes
1035 libc_cv_asm_symver_directive=no
1038 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1039 if test $libc_cv_asm_symver_directive = yes; then
1040 cat > conftest.s <<EOF
1043 .symver _sym,sym@VERS
1045 cat > conftest.map <<EOF
1054 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1055 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1056 -o conftest.so conftest.o
1057 -nostartfiles -nostdlib
1058 -Wl,--version-script,conftest.map
1059 1>&AS_MESSAGE_LOG_FD]);
1061 libc_cv_ld_version_script_option=yes
1063 libc_cv_ld_version_script_option=no
1066 libc_cv_ld_version_script_option=no
1069 libc_cv_ld_version_script_option=no
1072 if test $shared != no &&
1073 test $libc_cv_asm_symver_directive = yes &&
1074 test $libc_cv_ld_version_script_option = yes &&
1075 test $enable_versioning = yes; then
1077 AC_DEFINE(DO_VERSIONING)
1081 AC_SUBST(VERSIONING)
1083 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1085 *** WARNING: You should not compile GNU libc without versioning. Not using
1086 *** versioning will introduce incompatibilities so that old binaries
1087 *** will not run anymore.
1088 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1090 if test $elf = yes; then
1091 AC_CACHE_CHECK(for .previous assembler directive,
1092 libc_cv_asm_previous_directive, [dnl
1093 cat > conftest.s <<EOF
1094 .section foo_section
1097 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1098 libc_cv_asm_previous_directive=yes
1100 libc_cv_asm_previous_directive=no
1103 if test $libc_cv_asm_previous_directive = yes; then
1104 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1106 AC_CACHE_CHECK(for .popsection assembler directive,
1107 libc_cv_asm_popsection_directive, [dnl
1108 cat > conftest.s <<EOF
1109 .pushsection foo_section
1112 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1113 libc_cv_asm_popsection_directive=yes
1115 libc_cv_asm_popsection_directive=no
1118 if test $libc_cv_asm_popsection_directive = yes; then
1119 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1122 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1123 libc_cv_asm_protected_directive, [dnl
1124 cat > conftest.s <<EOF
1130 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1131 libc_cv_asm_protected_directive=yes
1133 libc_cv_asm_protected_directive=no
1136 AC_SUBST(libc_cv_asm_protected_directive)
1137 AC_DEFINE(HAVE_PROTECTED)
1138 AC_DEFINE(HAVE_HIDDEN)
1140 if test $libc_cv_asm_protected_directive = yes; then
1141 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1142 libc_cv_visibility_attribute,
1143 [cat > conftest.c <<EOF
1144 int foo __attribute__ ((visibility ("hidden"))) = 1;
1145 int bar __attribute__ ((visibility ("protected"))) = 1;
1147 libc_cv_visibility_attribute=no
1148 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1149 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1150 if grep '\.protected.*bar' conftest.s >/dev/null; then
1151 libc_cv_visibility_attribute=yes
1157 if test $libc_cv_visibility_attribute = yes; then
1158 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1162 if test $libc_cv_visibility_attribute = yes; then
1163 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1164 libc_cv_broken_visibility_attribute,
1165 [cat > conftest.c <<EOF
1167 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1168 int bar (int x) { return x; }
1170 libc_cv_broken_visibility_attribute=yes
1171 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
1173 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1175 libc_cv_broken_visibility_attribute=no
1178 rm -f conftest.c conftest.s
1180 if test $libc_cv_broken_visibility_attribute = yes; then
1181 AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
1185 AC_CACHE_CHECK(for broken __attribute__((alias())),
1186 libc_cv_broken_alias_attribute,
1187 [cat > conftest.c <<EOF
1188 extern int foo (int x) __asm ("xyzzy");
1189 int bar (int x) { return x; }
1190 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1192 extern __typeof (dfoo) dfoo __asm ("abccb");
1195 libc_cv_broken_alias_attribute=yes
1196 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1197 if grep 'xyzzy' conftest.s >/dev/null &&
1198 grep 'abccb' conftest.s >/dev/null; then
1199 libc_cv_broken_alias_attribute=no
1202 rm -f conftest.c conftest.s
1204 if test $libc_cv_broken_alias_attribute = yes; then
1205 AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
1208 if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
1209 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1210 libc_cv_have_sdata_section,
1211 [echo "int i;" > conftest.c
1212 libc_cv_have_sdata_section=no
1213 if ${CC-cc} $LDFLAGS -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1214 | grep '\.sdata' >/dev/null; then
1215 libc_cv_have_sdata_section=yes
1217 rm -f conftest.c conftest.so
1219 if test $libc_cv_have_sdata_section = yes; then
1220 AC_DEFINE(HAVE_SDATA_SECTION)
1224 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1225 libc_cv_initfinit_array, [dnl
1226 cat > conftest.c <<EOF
1227 int _start (void) { return 0; }
1228 int __start (void) { return 0; }
1229 int foo (void) { return 1; }
1230 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1232 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1233 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1235 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1236 libc_cv_initfinit_array=yes
1238 libc_cv_initfinit_array=no
1241 libc_cv_initfinit_array=no
1244 AC_SUBST(libc_cv_initfinit_array)
1245 if test $libc_cv_initfinit_array = yes; then
1246 AC_DEFINE(HAVE_INITFINI_ARRAY)
1249 AC_CACHE_CHECK(for -z nodelete option,
1250 libc_cv_z_nodelete, [dnl
1251 cat > conftest.c <<EOF
1252 int _start (void) { return 42; }
1254 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1255 -shared -o conftest.so conftest.c
1256 -nostartfiles -nostdlib
1257 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1259 libc_cv_z_nodelete=yes
1261 libc_cv_z_nodelete=no
1264 AC_SUBST(libc_cv_z_nodelete)
1266 AC_CACHE_CHECK(for -z nodlopen option,
1267 libc_cv_z_nodlopen, [dnl
1268 cat > conftest.c <<EOF
1269 int _start (void) { return 42; }
1271 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1272 -shared -o conftest.so conftest.c
1273 -nostartfiles -nostdlib
1274 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1276 libc_cv_z_nodlopen=yes
1278 libc_cv_z_nodlopen=no
1281 AC_SUBST(libc_cv_z_nodlopen)
1283 AC_CACHE_CHECK(for -z initfirst option,
1284 libc_cv_z_initfirst, [dnl
1285 cat > conftest.c <<EOF
1286 int _start (void) { return 42; }
1288 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1289 -shared -o conftest.so conftest.c
1290 -nostartfiles -nostdlib
1291 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1293 libc_cv_z_initfirst=yes
1295 libc_cv_z_initfirst=no
1298 AC_SUBST(libc_cv_z_initfirst)
1300 AC_CACHE_CHECK(for -Bgroup option,
1301 libc_cv_Bgroup, [dnl
1302 cat > conftest.c <<EOF
1303 int _start (void) { return 42; }
1305 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1306 -shared -o conftest.so conftest.c
1307 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1314 AC_SUBST(libc_cv_Bgroup)
1317 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1318 libc_cv_as_noexecstack, [dnl
1319 cat > conftest.c <<EOF
1322 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1323 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1324 && grep -q .note.GNU-stack conftest.s \
1325 && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wa,--noexecstack
1326 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1328 libc_cv_as_noexecstack=yes
1330 libc_cv_as_noexecstack=no
1333 if test $libc_cv_as_noexecstack = yes; then
1334 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1336 AC_SUBST(ASFLAGS_config)
1337 AC_CACHE_CHECK(for -z combreloc,
1338 libc_cv_z_combreloc, [dnl
1339 cat > conftest.c <<EOF
1340 extern int bar (int);
1342 int foo (void) { return bar (mumble); }
1344 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1345 -shared -o conftest.so conftest.c
1346 -nostdlib -nostartfiles
1347 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1349 dnl The following test is a bit weak. We must use a tool which can test
1350 dnl cross-platform since the gcc used can be a cross compiler. Without
1351 dnl introducing new options this is not easily doable. Instead use a tool
1352 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1353 dnl look for a section named .rel.dyn.
1354 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1355 libc_cv_z_combreloc=yes
1357 libc_cv_z_combreloc=no
1360 libc_cv_z_combreloc=no
1363 if test "$libc_cv_z_combreloc" = yes; then
1364 AC_DEFINE(HAVE_Z_COMBRELOC)
1367 AC_SUBST(libc_cv_z_combreloc)
1369 if test $elf != yes; then
1370 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1371 [AC_TRY_COMPILE(, [asm (".section .init");
1372 asm (".section .fini");
1373 asm ("${libc_cv_dot_text}");],
1374 libc_cv_have_initfini=yes,
1375 libc_cv_have_initfini=no)])
1376 AC_SUBST(libc_cv_have_initfini)dnl
1377 if test $libc_cv_have_initfini = yes; then
1378 AC_DEFINE(HAVE_INITFINI)
1382 if test $elf = yes -a $gnu_ld = yes; then
1383 AC_CACHE_CHECK(whether cc puts quotes around section names,
1384 libc_cv_have_section_quotes,
1385 [cat > conftest.c <<EOF
1386 static const int foo
1387 __attribute__ ((section ("bar"))) = 1;
1389 if ${CC-cc} -S conftest.c -o conftest.s; then
1390 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1391 libc_cv_have_section_quotes=yes
1393 libc_cv_have_section_quotes=no
1396 libc_cv_have_section_quotes=unknown
1400 if test $libc_cv_have_section_quotes = yes; then
1401 AC_DEFINE(HAVE_SECTION_QUOTES)
1405 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1406 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1407 [cat > conftest.$ac_ext <<EOF
1408 dnl This sometimes fails to find confdefs.h, for some reason.
1409 dnl [#]line $LINENO "[$]0"
1410 [#]line $LINENO "configure"
1411 #include "confdefs.h"
1412 void underscore_test(void) {
1415 if AC_TRY_EVAL(ac_compile); then
1416 if grep _underscore_test conftest* >/dev/null; then
1417 ifelse([$1], , :, [rm -f conftest*
1420 ifelse([$2], , , [rm -f conftest*
1424 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1425 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1426 ifelse([$2], , , [rm -f conftest*
1431 if test $elf = yes; then
1432 libc_cv_asm_underscores=no
1434 if test $ac_cv_prog_cc_works = yes; then
1435 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1436 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1437 libc_cv_asm_underscores=yes,
1438 libc_cv_asm_underscores=no)])
1440 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1441 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1442 libc_cv_asm_underscores=no)])
1445 if test $libc_cv_asm_underscores = no; then
1446 AC_DEFINE(NO_UNDERSCORES)
1449 if test $elf = yes; then
1450 libc_cv_weak_symbols=yes
1453 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1455 cat > conftest.s <<EOF
1457 ${libc_cv_asm_global_directive} foo
1460 .weak bar; bar = foo
1462 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1463 libc_cv_asm_weak_directive=yes
1465 libc_cv_asm_weak_directive=no
1469 if test $libc_cv_asm_weak_directive = no; then
1470 AC_CACHE_CHECK(for assembler .weakext directive,
1471 libc_cv_asm_weakext_directive,
1473 cat > conftest.s <<EOF
1475 ${libc_cv_asm_global_directive} foo
1479 ${libc_cv_asm_global_directive} baz
1482 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1483 libc_cv_asm_weakext_directive=yes
1485 libc_cv_asm_weakext_directive=no
1491 if test $libc_cv_asm_weak_directive = yes; then
1492 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1493 elif test $libc_cv_asm_weakext_directive = yes; then
1494 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1497 dnl The standard hppa assembler uses `;' to start comments and `!'
1498 dnl as a line separator. CRIS uses `;' to start comments and `@' for
1500 case "${host_cpu}-${host_os}" in
1502 libc_cv_asm_line_sep='@'
1503 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1506 AC_CACHE_CHECK(for assembler line separator,
1507 libc_cv_asm_line_sep, [dnl
1508 cat > conftest.s <<EOF
1511 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1512 libc_cv_asm_line_sep='!'
1514 if test -z "$enable_hacker_mode"; then
1515 echo "*** You need a newer assembler to compile glibc"
1519 libc_cv_asm_line_sep=';'
1522 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1526 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1527 cat > conftest.s <<EOF
1529 .type func,@function
1533 .cfi_rel_offset 1, 0
1536 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1537 libc_cv_asm_cfi_directives=yes
1539 libc_cv_asm_cfi_directives=no
1542 if test $libc_cv_asm_cfi_directives = yes; then
1543 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1546 AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
1547 libc_cv_cpp_asm_debuginfo, [dnl
1548 cat > conftest.S <<EOF
1549 #include "confdefs.h"
1554 ${libc_cv_asm_global_directive} foo
1556 /* Unfortunately this test only works for a real instruction,
1557 not for any of the machine-independent pseudo-ops.
1558 So we just have to assume everybody has a "nop". */
1565 if AC_TRY_COMMAND([${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) &&
1566 ac_pattern='conftest\.S'
1567 AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
1568 grep $ac_pattern 1>&AS_MESSAGE_LOG_FD]); then
1569 libc_cv_cpp_asm_debuginfo=yes
1571 libc_cv_cpp_asm_debuginfo=no
1573 rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
1574 if test $libc_cv_cpp_asm_debuginfo = yes; then
1575 AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
1578 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1579 cat > conftest.c <<\EOF
1584 dnl No \ in command here because it ends up inside ''.
1585 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1586 -nostdlib -nostartfiles -Wl,--no-whole-archive
1587 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1588 libc_cv_ld_no_whole_archive=yes
1590 libc_cv_ld_no_whole_archive=no
1593 if test $libc_cv_ld_no_whole_archive = yes; then
1594 no_whole_archive=-Wl,--no-whole-archive
1596 AC_SUBST(no_whole_archive)dnl
1598 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1599 cat > conftest.c <<\EOF
1604 dnl No \ in command here because it ends up inside ''.
1605 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1606 -nostdlib -nostartfiles -fexceptions
1607 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1608 libc_cv_gcc_exceptions=yes
1610 libc_cv_gcc_exceptions=no
1613 if test $libc_cv_gcc_exceptions = yes; then
1614 exceptions=-fexceptions
1616 AC_SUBST(exceptions)dnl
1618 if test "$host_cpu" = powerpc ; then
1619 # Check for a bug present in at least versions 2.8.x of GCC
1620 # and versions 1.0.x of EGCS.
1621 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1622 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1623 libc_cv_c_asmcr0_bug='no',
1624 libc_cv_c_asmcr0_bug='yes')])
1625 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1626 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1630 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1631 [cat > conftest.c <<EOF
1632 #line $LINENO "configure"
1633 static char *__EH_FRAME_BEGIN__;
1636 #ifdef CHECK__register_frame
1637 __register_frame (__EH_FRAME_BEGIN__);
1638 __deregister_frame (__EH_FRAME_BEGIN__);
1640 #ifdef CHECK__register_frame_info
1641 __register_frame_info (__EH_FRAME_BEGIN__);
1642 __deregister_frame_info (__EH_FRAME_BEGIN__);
1647 /* FIXME: this is fragile. */
1656 dl_iterate_phdr () {}
1658 libc_unwind_check="${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame_info \
1660 -nostdlib -nostartfiles -o conftest conftest.c \
1662 # Some platforms' specs put -lgcc first. The second one doesn't hurt.
1663 if AC_TRY_COMMAND([$libc_unwind_check >&AS_MESSAGE_LOG_FD]) ||
1664 AC_TRY_COMMAND([$libc_unwind_check -lgcc_eh -lgcc >&AS_MESSAGE_LOG_FD])
1666 if $libc_unwind_check -v 2>&1 >/dev/null \
1667 | grep -q -- --eh-frame-hdr; then
1668 libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
1670 libc_cv_gcc_dwarf2_unwind_info=static
1673 libc_cv_gcc_dwarf2_unwind_info=no
1675 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1676 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame
1677 $LDFLAGS -nostdlib -nostartfiles
1678 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1679 libc_cv_gcc_dwarf2_unwind_info=yes
1681 libc_cv_gcc_dwarf2_unwind_info=no
1685 case $libc_cv_gcc_dwarf2_unwind_info in
1687 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1690 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1691 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1695 dnl Check whether compiler understands __builtin_expect.
1696 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1697 [cat > conftest.c <<EOF
1698 #line $LINENO "configure"
1701 a = __builtin_expect (a, 10);
1702 return a == 10 ? 0 : 1;
1705 dnl No \ in command here because it ends up inside ''.
1706 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1707 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1708 libc_cv_gcc_builtin_expect=yes
1710 libc_cv_gcc_builtin_expect=no
1713 if test "$libc_cv_gcc_builtin_expect" = yes; then
1714 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1717 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1718 cat > conftest.c <<\EOF
1721 __builtin_memset (x, 0, 1000);
1725 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1727 libc_cv_gcc_builtin_memset=no
1729 libc_cv_gcc_builtin_memset=yes
1732 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1733 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1736 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1737 cat > conftest.c <<\EOF
1738 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1739 char *foo (const char *a, const char *b)
1741 return __builtin_strstr (a, b);
1745 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1747 libc_cv_gcc_builtin_redirection=yes
1749 libc_cv_gcc_builtin_redirection=no
1752 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
1753 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
1756 dnl Check whether the compiler supports subtraction of local labels.
1757 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1758 [cat > conftest.c <<EOF
1760 #line $LINENO "configure"
1763 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1764 void *p = &&l1 + ar[a];
1773 dnl No \ in command here because it ends up inside ''.
1774 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1775 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1776 libc_cv_gcc_subtract_local_labels=yes
1778 libc_cv_gcc_subtract_local_labels=no
1781 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1782 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1785 dnl Check whether the compiler supports the __thread keyword.
1786 if test "x$use__thread" != xno; then
1787 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1788 [cat > conftest.c <<\EOF
1789 __thread int a = 42;
1791 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1792 libc_cv_gcc___thread=yes
1794 libc_cv_gcc___thread=no
1797 if test "$libc_cv_gcc___thread" = yes; then
1798 AC_DEFINE(HAVE___THREAD)
1801 libc_cv_gcc___thread=no
1804 if test "$libc_cv_gcc___thread" = yes; then
1805 dnl Check whether the compiler supports the tls_model attribute.
1806 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1807 cat > conftest.c <<\EOF
1808 extern __thread int a __attribute__((tls_model ("initial-exec")));
1810 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1811 libc_cv_gcc_tls_model_attr=yes
1813 libc_cv_gcc_tls_model_attr=no
1816 if test "$libc_cv_gcc_tls_model_attr" = yes; then
1817 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
1821 dnl Check whether we have the gd library available.
1822 AC_MSG_CHECKING(for libgd)
1823 if test "$with_gd" != "no"; then
1824 old_CFLAGS="$CFLAGS"
1825 CFLAGS="$CFLAGS $libgd_include"
1826 old_LDFLAGS="$LDFLAGS"
1827 LDFLAGS="$LDFLAGS $libgd_ldflags"
1829 LIBS="$LIBS -lgd -lpng -lz -lm"
1830 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1831 CFLAGS="$old_CFLAGS"
1832 LDFLAGS="$old_LDFLAGS"
1837 AC_MSG_RESULT($LIBGD)
1840 dnl check for the size of 'long double'.
1841 AC_CHECK_SIZEOF(long double, 0)
1842 sizeof_long_double=$ac_cv_sizeof_long_double
1843 AC_SUBST(sizeof_long_double)
1845 ### End of automated tests.
1846 ### Now run sysdeps configure fragments.
1848 # They also can set these variables.
1850 ldd_rewrite_script=no
1851 libc_cv_sysconfdir=$sysconfdir
1852 libc_cv_gcc_unwind_find_fde=no
1854 # Iterate over all the sysdep directories we will use, running their
1855 # configure fragments, and looking for a uname implementation.
1857 for dir in $sysnames; do
1860 *) dest=$srcdir/$dir ;;
1862 if test -r $dest/configure; then
1863 AC_MSG_RESULT(running configure fragment for $dir)
1867 if test -z "$uname"; then
1868 if test -r $dest/uname.c ||
1869 test -r $dest/uname.S ||
1870 { test -r $dest/syscalls.list &&
1871 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1878 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
1879 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
1881 AC_SUBST(libc_cv_gcc_unwind_find_fde)
1883 # If we will use the generic uname implementation, we must figure out what
1884 # it will say by examining the system, and write the results in config-name.h.
1885 if test "$uname" = "sysdeps/generic"; then
1888 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1890 if test $uname_sysname != $config_os; then
1891 config_release=`echo $config_os | sed s/$uname_sysname//`
1894 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1895 if test -r /vmunix; then
1896 kernel_id=`strings /vmunix | grep UNIX`
1897 elif test -r /dynix; then
1898 kernel_id=`strings /dynix | grep DYNIX`
1904 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1907 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1909 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1910 != x$config_release; then
1911 # The configuration release is a substring of the kernel release.
1912 libc_cv_uname_release=$kernel_release
1913 elif test x$config_release != x; then
1914 libc_cv_uname_release=$config_release
1915 elif test x$kernel_release != x; then
1916 libc_cv_uname_release=$kernel_release
1918 libc_cv_uname_release=unknown
1920 uname_release="$libc_cv_uname_release"
1922 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1925 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1927 if test -n "$kernel_version"; then
1928 libc_cv_uname_version="$kernel_version"
1930 libc_cv_uname_version=unknown
1932 uname_version="$libc_cv_uname_version"
1934 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1935 config_uname=config-name.h:config-name.in
1937 # For non-generic uname, we don't need to create config-name.h at all.
1941 dnl This is tested by existing code and it's simpler to avoid changing it.
1942 AC_DEFINE(USE_IN_LIBIO)
1944 # Test for old glibc 2.0.x headers so that they can be removed properly
1945 # Search only in includedir.
1946 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1947 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1949 old_glibc_headers=yes
1951 old_glibc_headers=no
1953 AC_MSG_RESULT($old_glibc_headers)
1954 if test ${old_glibc_headers} = yes; then
1955 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1956 AC_MSG_WARN(*** be removed.)
1958 AC_SUBST(old_glibc_headers)
1960 AC_SUBST(libc_cv_slibdir)
1961 AC_SUBST(libc_cv_localedir)
1962 AC_SUBST(libc_cv_sysconfdir)
1963 AC_SUBST(libc_cv_rootsbindir)
1964 AC_SUBST(libc_cv_forced_unwind)
1966 AC_SUBST(use_ldconfig)
1967 AC_SUBST(ldd_rewrite_script)
1969 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
1970 if test $gnu_ld = yes; then
1971 AC_DEFINE(HAVE_GNU_LD)
1973 if test $gnu_as = yes; then
1974 AC_DEFINE(HAVE_GNU_AS)
1976 if test $elf = yes; then
1979 if test $xcoff = yes; then
1980 AC_DEFINE(HAVE_XCOFF)
1985 if test $shared = default; then
1986 if test $gnu_ld = yes; then
1989 # For now we do not assume shared libs are available. In future more
1990 # tests might become available.
1995 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1997 cat > conftest.c <<EOF
1998 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1999 # error PIC is default.
2002 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2006 AC_SUBST(pic_default)
2011 AC_SUBST(static_nss)
2012 AC_SUBST(nopic_initfini)
2017 *door*) linux_doors=yes ;;
2018 *) linux_doors=no ;;
2020 AC_SUBST(linux_doors)
2022 dnl See sysdeps/mach/configure.in for this variable.
2023 AC_SUBST(mach_interface_list)
2025 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2028 config_makefile=Makefile
2031 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2032 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2036 AC_CONFIG_FILES([config.make glibcbug ${config_makefile} ${config_uname}])
2037 AC_CONFIG_COMMANDS([default],[[
2038 case $CONFIG_FILES in *config.make*)
2039 echo "$config_vars" >> config.make;;
2041 test -d bits || mkdir bits]],[[config_vars='$config_vars']])