1 dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.13)dnl dnl Minimum Autoconf version required.
4 AC_INIT(include/features.h)
5 AC_CONFIG_HEADER(config.h)
6 AC_CONFIG_AUX_DIR(scripts)
8 # This will get text that should go into config.make.
11 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
13 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
16 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
18 *) config_vars="$config_vars
19 gmp-srcdir = $withval" ;;
22 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
24 --with-gd=DIR find libgd include dir and library with prefix DIR,
28 *) libgd_include="-I$withval/include"
29 libgd_ldflags="-L$withval/lib" ;;
32 AC_ARG_WITH(gd-include, dnl
33 --with-gd-include=DIR find libgd include files in DIR,
35 case "$with_gd_include" in
37 *) libgd_include="-I$withval" ;;
40 AC_ARG_WITH(gd-lib, dnl
41 --with-gd-lib=DIR find libgd library files in DIR,
43 case "$with_gd_lib" in
45 *) libgd_ldflags="-L$withval" ;;
49 if test -n "$libgd_include"; then
50 config_vars="$config_vars
51 CFLAGS-memusagestat.c = $libgd_include"
53 if test -n "$libgd_ldflags"; then
54 config_vars="$config_vars
55 libgd-LDFLAGS = $libgd_ldflags"
58 dnl Arguments to specify presence of other packages/features.
60 [ --with-fp if using floating-point hardware [default=yes]],
61 with_fp=$withval, with_fp=yes)
63 AC_ARG_WITH(binutils, dnl
64 --with-binutils=PATH specify location of binutils (as and ld),
65 path_binutils=$withval, path_binutils='')
67 --with-elf if using the ELF object format,
69 AC_ARG_WITH(xcoff, dnl
70 --with-xcoff if using the XCOFF object format,
71 xcoff=$withval, xcoff=no)
73 [ --without-cvs if CVS should not be used],
74 with_cvs=$withval, with_cvs=yes)
75 if test "$with_cvs" = yes; then
76 if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
83 AC_ARG_WITH(headers, dnl
84 [ --with-headers=PATH location of system headers to use
85 [e.g. /usr/src/linux/include]
86 [default=compiler default]],
87 sysheaders=$withval, sysheaders='')
89 AC_ARG_ENABLE(sanity-checks, dnl
90 [ --disable-sanity-checks really do not use threads (should not be used
91 except in special situations) [default=yes]],
92 enable_sanity=$enableval, enable_sanity=yes)
94 dnl Arguments to enable or disable building the static, shared, profiled,
95 dnl and -fomit-frame-pointer libraries.
96 dnl I've disabled this for now since we cannot build glibc without static
97 dnl libraries built in the moment.
98 dnl AC_ARG_ENABLE(static, dnl
99 dnl [ --enable-static build static library [default=yes]],
100 dnl static=$enableval, static=yes)
102 AC_ARG_ENABLE(shared, dnl
103 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
104 shared=$enableval, shared=default)
105 AC_ARG_ENABLE(profile, dnl
106 [ --enable-profile build profiled library [default=yes]],
107 profile=$enableval, profile=yes)
108 AC_ARG_ENABLE(omitfp, dnl
109 [ --enable-omitfp build undebuggable optimized library [default=no]],
110 omitfp=$enableval, omitfp=no)
111 AC_ARG_ENABLE(bounded, dnl
112 [ --enable-bounded build with runtime bounds checking [default=no]],
113 bounded=$enableval, bounded=no)
114 AC_ARG_ENABLE(versioning, dnl
115 [ --disable-versioning do not include versioning information in the
116 library objects [default=yes if supported]],
117 enable_versioning=$enableval, enable_versioning=yes)
119 AC_ARG_ENABLE(oldest-abi, dnl
120 [ --enable-oldest-abi=ABI configure the oldest ABI supported [e.g. 2.2]
121 [default=glibc default]],
122 oldest_abi=$enableval, oldest_abi=no)
123 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
126 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
130 dnl Generic infrastructure for drop-in additions to libc.
131 AC_ARG_ENABLE(add-ons, dnl
132 [ --enable-add-ons[=DIR1,DIR2]...
133 configure and build add-ons in DIR1,DIR2,...
134 search for add-ons if no parameter given],
135 [case "$enableval" in
136 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
137 test "$add_ons" = "*" && add_ons= ;;
138 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
142 dnl Let the user avoid using TLS. Don't know why but...
144 [ --without-tls prevent support for TLS],
145 usetls=$withval, usetls=yes)
147 AC_CONFIG_SUBDIRS($add_ons)
149 if test x"$add_ons" != x; then
150 for f in $add_ons; do
152 if test "$f" = "crypt"; then
154 *** It seems that you're using an old \`crypt' add-on. crypt is now
155 *** part of glibc and using the old add-on will not work with this
156 *** release. Start again with fresh sources and without the old
157 *** \`crypt' add-on.])
159 if test "$f" = "localedata"; then
161 *** It seems that you're using an old \`localedata' add-on. localedata
162 *** is now part of glibc and using the old add-on will not work with
163 *** this release. Start again with fresh sources and without the old
164 *** \`localedata' add-on.])
166 # Test whether such a subdir really exists.
167 if test -d $srcdir/$f; then
168 add_ons_pfx="$add_ons_pfx $f/"
170 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
175 dnl On some platforms we cannot use dynamic loading. We must provide
176 dnl static NSS modules.
177 AC_ARG_ENABLE(static-nss, dnl
178 [ --enable-static-nss build static NSS modules [default=no]],
179 static_nss=$enableval, static_nss=no)
180 dnl Enable static NSS also if we build no shared objects.
181 if test x"$static_nss" = xyes || test x"$shared" = xno; then
183 AC_DEFINE(DO_STATIC_NSS)
186 AC_ARG_ENABLE(force-install,
187 [ --disable-force-install don't force installation of files from this package,
188 even if they are older than the installed files],
189 force_install=$enableval, force_install=yes)
190 AC_SUBST(force_install)
192 dnl On some platforms we allow dropping compatibility with all kernel
194 AC_ARG_ENABLE(kernel,
195 [ --enable-kernel=VERSION compile for compatibility with kernel not older
197 minimum_kernel=$enableval)
198 dnl Prevent unreasonable values.
199 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
200 # Better nothing than this.
203 if test "$minimum_kernel" = current; then
204 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
208 dnl For the development we sometimes want gcc to issue even more warnings.
209 dnl This is not the default since many of the extra warnings are not
211 AC_ARG_ENABLE(all-warnings,
212 [ --enable-all-warnings enable all useful warnings gcc can issue],
213 all_warnings=$enableval)
214 AC_SUBST(all_warnings)
218 # The way shlib-versions is used to generate soversions.mk uses a
219 # fairly simplistic model for name recognition that can't distinguish
220 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
221 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
222 # tell. This doesn't get used much beyond that, so it's fairly safe.
227 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
231 # We keep the original values in `$config_*' and never modify them, so we
232 # can write them unchanged into config.make. Everything else uses
233 # $machine, $vendor, and $os, and changes them whenever convenient.
234 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
236 # Don't allow vendor == "unknown"
237 test "$config_vendor" = unknown && config_vendor=
238 config_os="`echo $config_os | sed 's/^unknown-//'`"
240 # Some configurations imply other options.
242 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
243 # These systems always use GNU tools.
244 gnu_ld=yes gnu_as=yes ;;
247 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
248 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
250 gnu* | linux* | sysv4* | solaris2* | irix6*)
251 # These systems (almost) always use the ELF format.
255 # These systems are always xcoff
261 machine=$config_machine
262 vendor=$config_vendor
265 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
267 if test "$machine" = rs6000; then
272 ### I put this here to prevent those annoying emails from people who cannot
273 ### read and try to compile glibc on unsupported platforms. --drepper
275 ### By using the undocumented --enable-hacker-mode option for configure
276 ### one can skip this test to make the configuration not fail for unsupported
279 if test -z "$enable_hacker_mode"; then
280 case "$machine-$host_os" in
281 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
284 echo "*** The GNU C library is currently not available for this platform."
285 echo "*** So far nobody cared to port it and if there is no volunteer it"
286 echo "*** might never happen. So, if you have interest to see glibc on"
287 echo "*** this platform visit"
288 echo "*** http://www.gnu.org/software/libc/porting.html"
289 echo "*** and join the group of porters"
295 dnl We need to use [ and ] for other purposes for a while now.
297 # Expand the configuration machine name into a subdirectory by architecture
298 # type and particular chip.
300 a29k | am29000) base_machine=a29k machine=a29k ;;
301 alpha*) base_machine=alpha machine=alpha/$machine ;;
302 arm*) base_machine=arm machine=arm/arm32/$machine ;;
303 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
304 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
305 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
306 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
307 i[3456]86) base_machine=i386 machine=i386/$machine ;;
308 ia64) base_machine=ia64 machine=ia64 ;;
309 m680?0) base_machine=m68k machine=m68k/$machine ;;
310 m68k) base_machine=m68k machine=m68k/m68020 ;;
311 m88???) base_machine=m88k machine=m88k/$machine ;;
312 m88k) base_machine=m88k machine=m88k/m88100 ;;
313 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
314 mips*) base_machine=mips machine=mips/$machine ;;
315 s390) base_machine=s390 machine=s390/s390-32 ;;
316 s390x) base_machine=s390 machine=s390/s390-64 ;;
317 sh3*) base_machine=sh machine=sh/sh3 ;;
318 sh4*) base_machine=sh machine=sh/sh4 ;;
320 base_machine=sparc machine=sparc/sparc32 ;;
321 sparcv8 | supersparc | hypersparc)
322 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
323 sparcv8plus | sparcv8plusa | sparcv9)
324 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
325 sparcv8plusb | sparcv9b)
326 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
327 sparc64 | ultrasparc)
328 base_machine=sparc machine=sparc/sparc64 ;;
329 sparc64b | ultrasparc3)
330 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
331 thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
332 *) base_machine=$machine ;;
335 AC_SUBST(base_machine)
337 if test "$base_machine" = "i386"; then
338 AC_DEFINE(USE_REGPARMS)
341 # Compute the list of sysdep directories for this configuration.
342 # This can take a while to compute.
343 sysdep_dir=$srcdir/sysdeps
344 AC_MSG_CHECKING(sysdep dirs)
345 dnl We need to use [ and ] for other purposes for a while now.
347 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
348 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
353 netbsd* | 386bsd* | freebsd* | bsdi*)
354 base_os=unix/bsd/bsd4.4 ;;
355 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
357 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
360 base_os=unix/sysv/irix6/$os ;;
362 base_os=unix/sysv/sysv4 ;;
364 base_os=unix/sysv/hpux/$os ;;
366 base_os=unix/sysv/aix/aix4.3 ;;
368 base_os=standalone ;;
373 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
376 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
380 o=`echo $tail | sed 's/[0-9]*$//'`
381 if test $o != $tail; then
384 # For linux-gnu, try linux-gnu, then linux.
385 o=`echo $tail | sed 's/-.*$//'`
386 if test $o != $tail; then
390 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
393 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
399 # For sparc/sparc32, try sparc/sparc32 and then sparc.
402 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
404 # Prepend the machine's FPU directory unless --without-fp.
405 if test "$with_fp" = yes; then
412 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
415 # Find what sysdep directories exist.
417 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
418 for d in $add_ons_pfx ''; do
419 for b in $base ''; do
420 for m0 in $mach ''; do
421 for v in /$vendor ''; do
422 test "$v" = / && continue
423 for o in /$ostry ''; do
424 test "$o" = / && continue
425 for m in $mach ''; do
426 if test "$m0$b$v$o$m"; then
427 try="${d}sysdeps$m0$b$v$o$m"
428 test -n "$enable_debug_configure" &&
429 echo "$0 [DEBUG]: try $try" >&2
430 if test -d $srcdir/$try; then
431 sysnames="$sysnames $try"
432 { test -n "$o" || test -n "$b"; } && os_used=t
433 { test -n "$m" || test -n "$m0"; } && machine_used=t
444 if test -z "$os_used" && test "$os" != none; then
445 AC_MSG_ERROR(Operating system $os is not supported.)
447 if test -z "$machine_used" && test "$machine" != none; then
448 AC_MSG_ERROR(The $machine is not supported.)
451 # We have now validated the configuration.
454 # If using ELF, look for an `elf' subdirectory of each machine directory.
455 # We prepend these rather than inserting them whereever the machine appears
456 # because things specified by the machine's ELF ABI should override
457 # OS-specific things, and should always be the same for any OS on the
458 # machine (otherwise what's the point of an ABI?).
459 if test "$elf" = yes; then
461 for d in $add_ons_pfx ''; do
463 if test -d $srcdir/${d}sysdeps$m/elf; then
464 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
468 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
472 # Expand the list of system names into a full list of directories
473 # from each element's parent name and Implies file (if present).
476 while test $# -gt 0; do
480 case " $names " in *" $name "*)
481 # Already in the list.
485 # Report each name as we discover it, so there is no long pause in output.
486 echo $ac_n "$name $ac_c" >&AC_FD_MSG
488 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
492 *) xsrcdir=$srcdir/ ;;
494 test -n "$enable_debug_configure" &&
495 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
497 if test -f $xsrcdir$name/Implies; then
498 # Collect more names from the `Implies' file (removing comments).
499 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
501 for x in $implied_candidate; do
503 if test -d $xsrcdir$name_base/$x; then
504 implied="$implied $name_base/$x";
507 for d in $add_ons_pfx ''; do
511 *) try_srcdir=$srcdir/ ;;
513 test -n "$enable_debug_configure" &&
514 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
515 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
517 implied="$implied $try"
521 if test $found = no; then
522 AC_MSG_WARN($name/Implies specifies nonexistent $x)
529 # Add NAME to the list of names.
532 # Find the parent of NAME, using the empty string if it has none.
534 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
537 # Add the names implied by NAME, and NAME's parent (if it has one), to
538 # the list of names to be processed (the argument list). We prepend the
539 # implied names to the list and append the parent. We want implied
540 # directories to come before further directories inferred from the
541 # configuration components; this ensures that for sysv4, unix/common
542 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
544 sysnames="`echo $implied $* $parent`"
545 test -n "$sysnames" && set $sysnames
548 # Add the default directories.
549 default_sysnames=sysdeps/generic
550 if test "$elf" = yes; then
551 default_sysnames="sysdeps/generic/elf $default_sysnames"
553 sysnames="$names $default_sysnames"
555 # The other names were emitted during the scan.
556 AC_MSG_RESULT($default_sysnames)
562 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
563 # The makefiles need to use a different form to find it in $srcdir.
564 INSTALL='\$(..)./scripts/install-sh -c'
568 # We need the physical current working directory. We cannot use the
569 # "pwd -P" shell builtin since that's not portable. Instead we try to
570 # find a pwd binary. Note that assigning to the PWD environment
571 # variable might have some interesting side effects, so we don't do
573 AC_PATH_PROG(PWD_P, pwd, no)
574 if test "$PWD_P" = no; then
575 AC_MSG_ERROR(*** A pwd binary could not be found.)
578 # These programs are version sensitive.
579 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
580 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
581 [version \([egcygnustpi-]*[0-9.]*\)],
582 [*gcc-2.9[5-9].*|*2.8.[1-9]*|*2.9|*2.9.[0-9]*|2.9[5-9]*|3.[0-9]*|cygnus-2.9[1-9]*|gcc-2.9[5-9]|gcc-2.1[0-9][0-9]|sgicc-*],
584 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
585 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
586 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
589 if test -n "$critic_missing"; then
591 *** These critical programs are missing or too old:$critic_missing
592 *** Check the INSTALL file for required versions.])
596 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
597 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
598 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
599 MSGFMT=: aux_missing="$aux_missing msgfmt")
600 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
601 [GNU texinfo.* \([0-9][0-9.]*\)],
603 MAKEINFO=: aux_missing="$aux_missing makeinfo")
604 AC_CHECK_PROG_VER(SED, sed, --version,
605 [GNU sed version \([0-9]*\.[0-9.]*\)],
606 [3.0[2-9]*|3.[1-9]*|[4-9]*],
607 SED=: aux_missing="$aux_missing sed")
611 if test $host != $build; then
612 AC_CHECK_PROGS(BUILD_CC, gcc cc)
614 AC_SUBST(cross_compiling)
617 AC_CHECK_TOOL(MIG, mig)
619 # Accept binutils 2.10.1 or newer (and also any ia64 2.9 version)
620 # XXX Commented out because it filters out too many good versions.
622 # AC_CHECK_PROG_VER(AS, $AS, --version,
623 # [GNU assembler.* \([0-9]*\.[0-9.]*\(-ia64-[0-9]*\)*\)],
624 # [2.10.[1-9]* | 2.1[1-9]* | 2.9-ia64-*], AS=: critic_missing=t)
626 test -n "$aux_missing" && AC_MSG_WARN([
627 *** These auxiliary programs are missing or too old:$aux_missing
628 *** some features will be disabled.
629 *** Check the INSTALL file for required versions.])
631 # glibcbug.in wants to know the compiler version.
632 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
635 # if using special system headers, find out the compiler's sekrit
636 # header directory and add that to the list. NOTE: Only does the right
637 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
638 if test -n "$sysheaders"; then
639 ccheaders=`$CC -print-file-name=include`
640 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
642 AC_SUBST(SYSINCLUDES)
644 # check if ranlib is necessary
645 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
646 cat > conftest.c <<EOF
651 $CC $CFLAGS -c conftest.c
652 $AR cr conftest.a conftest.c
653 cp conftest.a conftest2.a
655 if cmp -s conftest.a conftest2.a; then
656 libc_cv_ranlib_necessary=no
658 libc_cv_ranlib_necessary=yes
661 if test "$libc_cv_ranlib_necessary" = no; then
665 # Test if LD_LIBRARY_PATH contains the notation for the current directory
666 # since this would lead to problems installing/building glibc.
667 # LD_LIBRARY_PATH contains the current directory if one of the following
669 # - one of the terminals (":" and ";") is the first or last sign
670 # - two terminals occur directly after each other
671 # - the path contains an element with a dot in it
672 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
674 case ${LD_LIBRARY_PATH} in
675 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
676 ld_library_path_setting="contains current directory"
679 ld_library_path_setting="ok"
683 AC_MSG_RESULT($ld_library_path_setting)
684 if test "$ld_library_path_setting" != "ok"; then
686 *** LD_LIBRARY_PATH shouldn't contain the current directory when
687 *** building glibc. Please change the environment variable
688 *** and run configure again.])
691 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
692 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
693 libc_cv_gcc_static_libgcc=
695 libc_cv_gcc_static_libgcc=-static-libgcc
697 AC_SUBST(libc_cv_gcc_static_libgcc)
699 AC_PATH_PROG(BASH, bash, no)
700 if test "$BASH" != no &&
701 $BASH -c 'test "$BASH_VERSINFO" \
702 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
703 libc_cv_have_bash2=yes
705 libc_cv_have_bash2=no
707 AC_SUBST(libc_cv_have_bash2)
709 dnl We need a ksh compatible shell for tzselect.
710 if test "$BASH" = no; then
711 AC_PATH_PROG(KSH, ksh, no)
712 if test "$KSH" = no; then
722 AC_SUBST(libc_cv_have_ksh)
725 AC_PATH_PROG(PERL, perl, no)
726 if test "$PERL" != no &&
727 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
730 AC_PATH_PROG(INSTALL_INFO, install-info, no,
731 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
732 if test "$INSTALL_INFO" != "no"; then
733 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
735 # There is a hard ^_ on the next line. I am open to better ideas.
737 echo 'File: dir Node: Top This is the top of the INFO tree'
738 echo '* Menu:') >conftest.d/dir
739 (echo 'INFO-DIR-SECTION i-d-s works'
740 echo 'START-INFO-DIR-ENTRY'
741 echo '* Prog: (prog). Program.'
742 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
743 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
745 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
746 then libc_cv_old_debian_install_info=no
747 else libc_cv_old_debian_install_info=yes
749 else libc_cv_old_debian_install_info=no testfailed=t
752 if test -n "$testfailed"
753 then AC_MSG_WARN([install-info errored out, check config.log])
755 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
757 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
759 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
761 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
762 echo '#include <stddef.h>
763 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
764 if eval "$ac_cpp conftest.c 2>/dev/null" \
765 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
766 libc_cv_signed_size_t=no
768 libc_cv_signed_size_t=yes
771 if test $libc_cv_signed_size_t = yes; then
772 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
773 cat >> confdefs.h <<\EOF
775 #define __SIZE_TYPE__ unsigned
779 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
781 [#define __need_size_t
782 #define __need_wchar_t
785 #include <stddef.h>], [size_t size; wchar_t wchar;
787 #error stddef.h ignored __need_*
789 if (&size == NULL || &wchar == NULL) abort ();],
790 libc_cv_friendly_stddef=yes,
791 libc_cv_friendly_stddef=no)])
792 if test $libc_cv_friendly_stddef = yes; then
793 config_vars="$config_vars
794 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
797 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
798 libc_cv_need_minus_P, [dnl
799 cat > conftest.S <<EOF
800 #include "confdefs.h"
801 /* Nothing whatsoever. */
803 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
804 libc_cv_need_minus_P=no
806 libc_cv_need_minus_P=yes
809 if test $libc_cv_need_minus_P = yes; then
810 config_vars="$config_vars
811 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
814 AC_MSG_CHECKING(whether .text pseudo-op must be used)
815 AC_CACHE_VAL(libc_cv_dot_text, [dnl
816 cat > conftest.s <<EOF
820 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
821 libc_cv_dot_text=.text
824 if test -z "$libc_cv_dot_text"; then
830 AC_CACHE_CHECK(for assembler global-symbol directive,
831 libc_cv_asm_global_directive, [dnl
832 libc_cv_asm_global_directive=UNKNOWN
833 for ac_globl in .globl .global .EXPORT; do
834 cat > conftest.s <<EOF
839 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
840 libc_cv_asm_global_directive=${ac_globl}
843 test $libc_cv_asm_global_directive != UNKNOWN && break
845 if test $libc_cv_asm_global_directive = UNKNOWN; then
846 AC_MSG_ERROR(cannot determine asm global directive)
848 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
851 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
852 cat > conftest.s <<EOF
855 .set glibc_conftest_frobozz,foo
856 $libc_cv_asm_global_directive glibc_conftest_frobozz
858 # The alpha-dec-osf1 assembler gives only a warning for `.set'
859 # (but it doesn't work), so we must do a linking check to be sure.
860 cat > conftest1.c <<\EOF
861 extern int glibc_conftest_frobozz;
862 main () { printf ("%d\n", glibc_conftest_frobozz); }
864 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
865 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
866 libc_cv_asm_set_directive=yes
868 libc_cv_asm_set_directive=no
871 if test $libc_cv_asm_set_directive = yes; then
872 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
875 # The Aix ld uses global .symbol_names instead of symbol_names.
878 AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
881 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
882 [cat > conftest.s <<EOF
885 .symver _sym,sym@VERS
887 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
888 libc_cv_asm_symver_directive=yes
890 libc_cv_asm_symver_directive=no
893 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
894 if test $libc_cv_asm_symver_directive = yes; then
895 cat > conftest.s <<EOF
898 .symver _sym,sym@VERS
900 cat > conftest.map <<EOF
909 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
910 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
911 -nostartfiles -nostdlib
912 -Wl,--version-script,conftest.map
915 libc_cv_ld_version_script_option=yes
917 libc_cv_ld_version_script_option=no
920 libc_cv_ld_version_script_option=no
923 libc_cv_ld_version_script_option=no
926 if test $shared != no &&
927 test $libc_cv_asm_symver_directive = yes &&
928 test $libc_cv_ld_version_script_option = yes &&
929 test $enable_versioning = yes; then
931 AC_DEFINE(DO_VERSIONING)
937 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
939 *** WARNING: You should not compile GNU libc without versioning. Not using
940 *** versioning will introduce incompatibilities so that old binaries
941 *** will not run anymore.
942 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
944 if test $elf = yes; then
945 AC_CACHE_CHECK(for .previous assembler directive,
946 libc_cv_asm_previous_directive, [dnl
947 cat > conftest.s <<EOF
951 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
952 libc_cv_asm_previous_directive=yes
954 libc_cv_asm_previous_directive=no
957 if test $libc_cv_asm_previous_directive = yes; then
958 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
960 AC_CACHE_CHECK(for .popsection assembler directive,
961 libc_cv_asm_popsection_directive, [dnl
962 cat > conftest.s <<EOF
963 .pushsection foo_section
966 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
967 libc_cv_asm_popsection_directive=yes
969 libc_cv_asm_popsection_directive=no
972 if test $libc_cv_asm_popsection_directive = yes; then
973 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
976 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
977 libc_cv_asm_protected_directive, [dnl
978 cat > conftest.s <<EOF
984 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
985 libc_cv_asm_protected_directive=yes
987 libc_cv_asm_protected_directive=no
990 AC_SUBST(libc_cv_asm_protected_directive)
991 AC_DEFINE(HAVE_PROTECTED)
992 AC_DEFINE(HAVE_HIDDEN)
994 if test $libc_cv_asm_protected_directive = yes; then
995 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
996 libc_cv_visibility_attribute,
997 [cat > conftest.c <<EOF
998 int foo __attribute__ ((visibility ("hidden"))) = 1;
999 int bar __attribute__ ((visibility ("protected"))) = 1;
1001 libc_cv_visibility_attribute=no
1002 if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
1003 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1004 if grep '\.protected.*bar' conftest.s >/dev/null; then
1005 libc_cv_visibility_attribute=yes
1011 if test $libc_cv_visibility_attribute = yes; then
1012 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1016 if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
1017 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1018 libc_cv_have_sdata_section,
1019 [echo "int i;" > conftest.c
1020 libc_cv_have_sdata_section=no
1021 if ${CC-cc} -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1022 | grep '\.sdata' >/dev/null; then
1023 libc_cv_have_sdata_section=yes
1025 rm -f conftest.c conftest.so
1027 if test $libc_cv_have_sdata_section = yes; then
1028 AC_DEFINE(HAVE_SDATA_SECTION)
1032 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1033 libc_cv_initfinit_array, [dnl
1034 cat > conftest.c <<EOF
1035 int _start (void) { return 0; }
1036 int __start (void) { return 0; }
1037 int foo (void) { return 1; }
1038 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1040 if AC_TRY_COMMAND([${CC-cc} -o conftest conftest.c
1041 -static -nostartfiles -nostdlib 1>&AC_FD_CC])
1043 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1044 libc_cv_initfinit_array=yes
1046 libc_cv_initfinit_array=no
1049 libc_cv_initfinit_array=no
1052 AC_SUBST(libc_cv_initfinit_array)
1053 if test $libc_cv_initfinit_array = yes; then
1054 AC_DEFINE(HAVE_INITFINI_ARRAY)
1057 AC_CACHE_CHECK(for -z nodelete option,
1058 libc_cv_z_nodelete, [dnl
1059 cat > conftest.c <<EOF
1060 int _start (void) { return 42; }
1062 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1063 -nostartfiles -nostdlib
1064 -Wl,--enable-new-dtags,-z,nodelete 1>&AC_FD_CC])
1066 libc_cv_z_nodelete=yes
1068 libc_cv_z_nodelete=no
1071 AC_SUBST(libc_cv_z_nodelete)
1073 AC_CACHE_CHECK(for -z nodlopen option,
1074 libc_cv_z_nodlopen, [dnl
1075 cat > conftest.c <<EOF
1076 int _start (void) { return 42; }
1078 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1079 -nostartfiles -nostdlib
1080 -Wl,--enable-new-dtags,-z,nodlopen 1>&AC_FD_CC])
1082 libc_cv_z_nodlopen=yes
1084 libc_cv_z_nodlopen=no
1087 AC_SUBST(libc_cv_z_nodlopen)
1089 AC_CACHE_CHECK(for -z initfirst option,
1090 libc_cv_z_initfirst, [dnl
1091 cat > conftest.c <<EOF
1092 int _start (void) { return 42; }
1094 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1095 -nostartfiles -nostdlib
1096 -Wl,--enable-new-dtags,-z,initfirst 1>&AC_FD_CC])
1098 libc_cv_z_initfirst=yes
1100 libc_cv_z_initfirst=no
1103 AC_SUBST(libc_cv_z_initfirst)
1105 AC_CACHE_CHECK(for -Bgroup option,
1106 libc_cv_Bgroup, [dnl
1107 cat > conftest.c <<EOF
1108 int _start (void) { return 42; }
1110 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c -Wl,-Bgroup -nostdlib 1>&AC_FD_CC])
1117 AC_SUBST(libc_cv_Bgroup)
1119 AC_CACHE_CHECK(for -z combreloc,
1120 libc_cv_z_combreloc, [dnl
1121 cat > conftest.c <<EOF
1122 extern int bar (int);
1124 int foo (void) { return bar (mumble); }
1126 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1127 -nostdlib -nostartfiles
1128 -Wl,-z,combreloc 1>&AC_FD_CC])
1130 dnl The following test is a bit weak. We must use a tool which can test
1131 dnl cross-platform since the gcc used can be a cross compiler. Without
1132 dnl introducing new options this is not easily doable. Instead use a tool
1133 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1134 dnl look for a section named .rel.dyn.
1135 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1136 libc_cv_z_combreloc=yes
1138 libc_cv_z_combreloc=no
1141 libc_cv_z_combreloc=no
1144 if test "$libc_cv_z_combreloc" = yes; then
1145 AC_DEFINE(HAVE_Z_COMBRELOC)
1148 AC_SUBST(libc_cv_z_combreloc)
1150 if test $elf != yes; then
1151 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1152 [AC_TRY_COMPILE(, [asm (".section .init");
1153 asm (".section .fini");
1154 asm ("${libc_cv_dot_text}");],
1155 libc_cv_have_initfini=yes,
1156 libc_cv_have_initfini=no)])
1157 AC_SUBST(libc_cv_have_initfini)dnl
1158 if test $libc_cv_have_initfini = yes; then
1159 AC_DEFINE(HAVE_INITFINI)
1163 if test $elf = yes -a $gnu_ld = yes; then
1164 AC_CACHE_CHECK(whether cc puts quotes around section names,
1165 libc_cv_have_section_quotes,
1166 [cat > conftest.c <<EOF
1167 static const int foo
1168 __attribute__ ((section ("bar"))) = 1;
1170 if ${CC-cc} -S conftest.c -o conftest.s; then
1171 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1172 libc_cv_have_section_quotes=yes
1174 libc_cv_have_section_quotes=no
1177 libc_cv_have_section_quotes=unknown
1181 if test $libc_cv_have_section_quotes = yes; then
1182 AC_DEFINE(HAVE_SECTION_QUOTES)
1186 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1187 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1188 [cat > conftest.$ac_ext <<EOF
1189 dnl This sometimes fails to find confdefs.h, for some reason.
1190 dnl [#]line __oline__ "[$]0"
1191 [#]line __oline__ "configure"
1192 #include "confdefs.h"
1193 void underscore_test(void) {
1196 if AC_TRY_EVAL(ac_compile); then
1197 if grep _underscore_test conftest* >/dev/null; then
1198 ifelse([$1], , :, [rm -f conftest*
1201 ifelse([$2], , , [rm -f conftest*
1205 echo "configure: failed program was:" >&AC_FD_CC
1206 cat conftest.$ac_ext >&AC_FD_CC
1207 ifelse([$2], , , [rm -f conftest*
1212 if test $elf = yes; then
1213 libc_cv_asm_underscores=no
1215 if test $ac_cv_prog_cc_works = yes; then
1216 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1217 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1218 libc_cv_asm_underscores=yes,
1219 libc_cv_asm_underscores=no)])
1221 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1222 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1223 libc_cv_asm_underscores=no)])
1226 if test $libc_cv_asm_underscores = no; then
1227 AC_DEFINE(NO_UNDERSCORES)
1230 if test $elf = yes; then
1231 libc_cv_weak_symbols=yes
1234 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1236 cat > conftest.s <<EOF
1238 ${libc_cv_asm_global_directive} foo
1241 .weak bar; bar = foo
1243 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
1244 libc_cv_asm_weak_directive=yes
1246 libc_cv_asm_weak_directive=no
1250 if test $libc_cv_asm_weak_directive = no; then
1251 AC_CACHE_CHECK(for assembler .weakext directive,
1252 libc_cv_asm_weakext_directive,
1254 cat > conftest.s <<EOF
1256 ${libc_cv_asm_global_directive} foo
1260 ${libc_cv_asm_global_directive} baz
1263 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
1264 libc_cv_asm_weakext_directive=yes
1266 libc_cv_asm_weakext_directive=no
1272 if test $libc_cv_asm_weak_directive = yes; then
1273 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1274 elif test $libc_cv_asm_weakext_directive = yes; then
1275 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1278 dnl The standard hppa assembler uses `;' to start comments and `!'
1279 dnl as a line separator. CRIS uses `;' to start comments and `@' for
1281 case "${host_cpu}-${host_os}" in
1283 libc_cv_asm_line_sep='@'
1284 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1287 AC_CACHE_CHECK(for assembler line separator,
1288 libc_cv_asm_line_sep, [dnl
1289 cat > conftest.s <<EOF
1292 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
1293 libc_cv_asm_line_sep='!'
1295 if test -z "$enable_hacker_mode"; then
1296 echo "*** You need a newer assembler to compile glibc"
1300 libc_cv_asm_line_sep=';'
1303 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1307 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1308 cat > conftest.c <<\EOF
1313 dnl No \ in command here because it ends up inside ''.
1314 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1315 -nostdlib -nostartfiles -Wl,--no-whole-archive
1316 -o conftest conftest.c 1>&AC_FD_CC]); then
1317 libc_cv_ld_no_whole_archive=yes
1319 libc_cv_ld_no_whole_archive=no
1322 if test $libc_cv_ld_no_whole_archive = yes; then
1323 no_whole_archive=-Wl,--no-whole-archive
1325 AC_SUBST(no_whole_archive)dnl
1327 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1328 cat > conftest.c <<\EOF
1333 dnl No \ in command here because it ends up inside ''.
1334 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1335 -nostdlib -nostartfiles -fexceptions
1336 -o conftest conftest.c 1>&AC_FD_CC]); then
1337 libc_cv_gcc_exceptions=yes
1339 libc_cv_gcc_exceptions=no
1342 if test $libc_cv_gcc_exceptions = yes; then
1343 exceptions=-fexceptions
1345 AC_SUBST(exceptions)dnl
1347 if test "$base_machine" = alpha ; then
1348 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
1349 cat > conftest.c <<\EOF
1353 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
1355 libc_cv_gcc_alpha_ng_prefix=yes
1357 libc_cv_gcc_alpha_ng_prefix=no
1360 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
1361 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
1363 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
1367 if test "$host_cpu" = powerpc ; then
1368 # Check for a bug present in at least versions 2.8.x of GCC
1369 # and versions 1.0.x of EGCS.
1370 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1371 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1372 libc_cv_c_asmcr0_bug='no',
1373 libc_cv_c_asmcr0_bug='yes')])
1374 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1375 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1379 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1380 [cat > conftest.c <<EOF
1381 #line __oline__ "configure"
1382 static char *__EH_FRAME_BEGIN__;
1385 #ifdef CHECK__register_frame
1386 __register_frame (__EH_FRAME_BEGIN__);
1387 __deregister_frame (__EH_FRAME_BEGIN__);
1389 #ifdef CHECK__register_frame_info
1390 __register_frame_info (__EH_FRAME_BEGIN__);
1391 __deregister_frame_info (__EH_FRAME_BEGIN__);
1396 /* FIXME: this is fragile. */
1406 dnl No \ in command here because it ends up inside ''.
1407 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1408 -nostdlib -nostartfiles
1409 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1410 libc_cv_gcc_dwarf2_unwind_info=static
1412 libc_cv_gcc_dwarf2_unwind_info=no
1414 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1415 -nostdlib -nostartfiles
1416 -o conftest conftest.c -lgcc -lgcc_eh >&AC_FD_CC]); then
1417 if ${CC-cc} $CFLAGS -DCHECK__register_frame_info -nostdlib -nostartfiles \
1418 -o conftest conftest.c -lgcc -lgcc_eh -v 2>&1 >/dev/null \
1419 | grep -q -- --eh-frame-hdr; then
1420 libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
1422 libc_cv_gcc_dwarf2_unwind_info=static
1425 libc_cv_gcc_dwarf2_unwind_info=no
1427 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1428 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1429 -nostdlib -nostartfiles
1430 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1431 libc_cv_gcc_dwarf2_unwind_info=yes
1433 libc_cv_gcc_dwarf2_unwind_info=no
1437 case $libc_cv_gcc_dwarf2_unwind_info in
1439 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1442 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1443 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1447 dnl Check whether compiler understands __builtin_expect.
1448 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1449 [cat > conftest.c <<EOF
1450 #line __oline__ "configure"
1453 a = __builtin_expect (a, 10);
1454 return a == 10 ? 0 : 1;
1457 dnl No \ in command here because it ends up inside ''.
1458 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1459 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1460 libc_cv_gcc_builtin_expect=yes
1462 libc_cv_gcc_builtin_expect=no
1465 if test "$libc_cv_gcc_builtin_expect" = yes; then
1466 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1469 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1470 cat > conftest.c <<\EOF
1473 __builtin_memset (x, 0, 1000);
1477 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1479 libc_cv_gcc_builtin_memset=no
1481 libc_cv_gcc_builtin_memset=yes
1484 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1485 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1488 dnl Check whether the compiler supports subtraction of local labels.
1489 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1490 [cat > conftest.c <<EOF
1492 #line __oline__ "configure"
1495 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1496 void *p = &&l1 + ar[a];
1505 dnl No \ in command here because it ends up inside ''.
1506 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1507 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1508 libc_cv_gcc_subtract_local_labels=yes
1510 libc_cv_gcc_subtract_local_labels=no
1513 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1514 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1517 dnl Check whether the compiler supports the __thread keyword.
1518 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1519 [cat > conftest.c <<EOF
1520 __thread int a = 42;
1522 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AC_FD_CC]); then
1523 libc_cv_gcc___thread=yes
1525 libc_cv_gcc___thread=no
1528 if test "$libc_cv_gcc___thread" = yes; then
1529 AC_DEFINE(HAVE___THREAD)
1533 dnl Check whether we have the gd library available.
1534 AC_MSG_CHECKING(for libgd)
1535 if test "$with_gd" != "no"; then
1536 old_CFLAGS="$CFLAGS"
1537 CFLAGS="$CFLAGS $libgd_include"
1538 old_LDFLAGS="$LDFLAGS"
1539 LDFLAGS="$LDFLAGS $libgd_ldflags"
1541 LIBS="$LIBS -lgd -lpng -lz -lm"
1542 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1543 CFLAGS="$old_CFLAGS"
1544 LDFLAGS="$old_LDFLAGS"
1549 AC_MSG_RESULT($LIBGD)
1552 dnl check for the size of 'long double'.
1553 AC_CHECK_SIZEOF(long double, 0)
1554 sizeof_long_double=$ac_cv_sizeof_long_double
1555 AC_SUBST(sizeof_long_double)
1557 ### End of automated tests.
1558 ### Now run sysdeps configure fragments.
1560 # sysdeps configure fragments may set these with files to be linked below.
1564 # They also can set these variables.
1566 ldd_rewrite_script=no
1567 libc_cv_sysconfdir=$sysconfdir
1568 libc_cv_gcc_unwind_find_fde=no
1570 # Iterate over all the sysdep directories we will use, running their
1571 # configure fragments, and looking for a uname implementation.
1573 for dir in $sysnames; do
1576 *) dest=$srcdir/$dir ;;
1578 if test -r $dest/configure; then
1579 AC_MSG_RESULT(running configure fragment for $dest)
1583 if test -z "$uname"; then
1584 if test -r $dest/uname.c ||
1585 test -r $dest/uname.S ||
1586 { test -r $dest/syscalls.list &&
1587 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1594 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
1595 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
1597 AC_SUBST(libc_cv_gcc_unwind_find_fde)
1599 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1601 # If we will use the generic uname implementation, we must figure out what
1602 # it will say by examining the system, and write the results in config-name.h.
1603 if test "$uname" = "sysdeps/generic"; then
1606 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1608 if test $uname_sysname != $config_os; then
1609 config_release=`echo $config_os | sed s/$uname_sysname//`
1612 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1613 if test -r /vmunix; then
1614 kernel_id=`strings /vmunix | grep UNIX`
1615 elif test -r /dynix; then
1616 kernel_id=`strings /dynix | grep DYNIX`
1622 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1623 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1625 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1627 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1628 != x$config_release; then
1629 # The configuration release is a substring of the kernel release.
1630 libc_cv_uname_release=$kernel_release
1631 elif test x$config_release != x; then
1632 libc_cv_uname_release=$config_release
1633 elif test x$kernel_release != x; then
1634 libc_cv_uname_release=$kernel_release
1636 libc_cv_uname_release=unknown
1638 uname_release="$libc_cv_uname_release"
1640 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1641 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1643 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1645 if test -n "$kernel_version"; then
1646 libc_cv_uname_version="$kernel_version"
1648 libc_cv_uname_version=unknown
1650 uname_version="$libc_cv_uname_version"
1652 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1653 config_uname=config-name.h:config-name.in
1655 # For non-generic uname, we don't need to create config-name.h at all.
1659 dnl This is tested by existing code and it's simpler to avoid changing it.
1660 AC_DEFINE(USE_IN_LIBIO)
1662 # Test for old glibc 2.0.x headers so that they can be removed properly
1663 # Search only in includedir.
1664 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1665 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1667 old_glibc_headers=yes
1669 old_glibc_headers=no
1671 AC_MSG_RESULT($old_glibc_headers)
1672 if test ${old_glibc_headers} = yes; then
1673 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1674 AC_MSG_WARN(*** be removed.)
1676 AC_SUBST(old_glibc_headers)
1678 AC_SUBST(libc_cv_slibdir)
1679 AC_SUBST(libc_cv_localedir)
1680 AC_SUBST(libc_cv_sysconfdir)
1681 AC_SUBST(libc_cv_rootsbindir)
1683 AC_SUBST(use_ldconfig)
1684 AC_SUBST(ldd_rewrite_script)
1686 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
1687 if test $gnu_ld = yes; then
1688 AC_DEFINE(HAVE_GNU_LD)
1690 if test $gnu_as = yes; then
1691 AC_DEFINE(HAVE_GNU_AS)
1693 if test $elf = yes; then
1696 if test $xcoff = yes; then
1697 AC_DEFINE(HAVE_XCOFF)
1702 if test $shared = default; then
1703 if test $gnu_ld = yes; then
1706 # For now we do not assume shared libs are available. In future more
1707 # tests might become available.
1712 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1714 cat > conftest.c <<EOF
1715 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1716 # error PIC is default.
1719 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1723 AC_SUBST(pic_default)
1728 AC_SUBST(static_nss)
1729 AC_SUBST(nopic_initfini)
1734 *door*) linux_doors=yes ;;
1735 *) linux_doors=no ;;
1737 AC_SUBST(linux_doors)
1739 dnl See sysdeps/mach/configure.in for this variable.
1740 AC_SUBST(mach_interface_list)
1742 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1745 config_makefile=Makefile
1748 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1749 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1753 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1754 case $CONFIG_FILES in *config.make*)
1755 echo "$config_vars" >> config.make;;
1757 test -d bits || mkdir bits], [config_vars='$config_vars'])