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 = $withval" ;;
22 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
23 AC_ARG_WITH(gettext, dnl
24 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
26 case "$with_gettext" in
28 AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
31 config_vars="$config_vars
32 gettext-srcdir = $withval" ;;
35 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
37 --with-gd=DIR find libgd include dir and library with prefix DIR,
41 *) libgd_include="-I$withval/include"
42 libgd_ldflags="-L$withval/lib" ;;
45 AC_ARG_WITH(gd-include, dnl
46 --with-gd-include=DIR find libgd include files in DIR,
48 case "$with_gd_include" in
50 *) libgd_include="-I$withval" ;;
53 AC_ARG_WITH(gd-lib, dnl
54 --with-gd-lib=DIR find libgd library files in DIR,
56 case "$with_gd_lib" in
58 *) libgd_ldflags="-L$withval" ;;
62 if test -n "$libgd_include"; then
63 config_vars="$config_vars
64 CFLAGS-memusagestat.c = $libgd_include"
66 if test -n "$libgd_ldflags"; then
67 config_vars="$config_vars
68 libgd-LDFLAGS = $libgd_ldflags"
71 dnl Arguments to specify presence of other packages/features.
73 [ --with-fp if using floating-point hardware [default=yes]],
74 with_fp=$withval, with_fp=yes)
75 AC_ARG_WITH(binutils, dnl
76 --with-binutils=PATH specify location of binutils (as and ld),
77 path_binutils=$withval, path_binutils='')
79 --with-elf if using the ELF object format,
82 [ --without-cvs if CVS should not be used],
83 with_cvs=$withval, with_cvs=yes)
86 AC_ARG_WITH(headers, dnl
87 [ --with-headers=PATH location of system headers to use
88 [e.g. /usr/src/linux/include]
89 [default=compiler default]],
90 sysheaders=$withval, sysheaders='')
92 AC_ARG_ENABLE(libio, dnl
93 [ --enable-libio build in GNU libio instead of GNU stdio],
94 [if test $enableval = yes; then
101 AC_ARG_ENABLE(sanity-checks, dnl
102 [ --disable-sanity-checks really do not use threads (should not be used
103 except in special situations) [default=yes]],
104 enable_sanity=$enableval, enable_sanity=yes)
106 dnl Arguments to enable or disable building the static, shared, profiled,
107 dnl and -fomit-frame-pointer libraries.
108 dnl I've disabled this for now since we cannot build glibc without static
109 dnl libraries built in the moment.
110 dnl AC_ARG_ENABLE(static, dnl
111 dnl [ --enable-static build static library [default=yes]],
112 dnl static=$enableval, static=yes)
114 AC_ARG_ENABLE(shared, dnl
115 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
116 shared=$enableval, shared=default)
117 AC_ARG_ENABLE(profile, dnl
118 [ --enable-profile build profiled library [default=yes]],
119 profile=$enableval, profile=yes)
120 AC_ARG_ENABLE(omitfp, dnl
121 [ --enable-omitfp build undebuggable optimized library [default=no]],
122 omitfp=$enableval, omitfp=no)
123 AC_ARG_ENABLE(bounded, dnl
124 [ --enable-bounded build with runtime bounds checking [default=no]],
125 bounded=$enableval, bounded=no)
126 AC_ARG_ENABLE(versioning, dnl
127 [ --disable-versioning do not include versioning information in the
128 library objects [default=yes if supported]],
129 enable_versioning=$enableval, enable_versioning=yes)
131 dnl Generic infrastructure for drop-in additions to libc.
132 AC_ARG_ENABLE(add-ons, dnl
133 [ --enable-add-ons[=DIR1,DIR2]...
134 configure and build add-ons in DIR1,DIR2,...
135 search for add-ons if no parameter given],
136 [case "$enableval" in
137 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
138 test "$add_ons" = "*" && add_ons= ;;
139 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
143 AC_CONFIG_SUBDIRS($add_ons)
145 if test x"$add_ons" != x; then
146 for f in $add_ons; do
147 # Test whether such a subdir really exists.
148 if test -d $srcdir/$f; then
149 add_ons_pfx="$add_ons_pfx $f/"
151 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
156 dnl On some platforms we cannot use dynamic loading. We must provide
157 dnl static NSS modules.
158 AC_ARG_ENABLE(static-nss, dnl
159 [ --enable-static-nss build static NSS modules [default=no]],
160 static_nss=$enableval, static_nss=no)
161 if test x"$static_nss" = xyes; then
162 AC_DEFINE(DO_STATIC_NSS)
165 AC_ARG_ENABLE(force-install,
166 [ --disable-force-install don't force installation of files from this package,
167 even if they are older than the installed files],
168 force_install=$enableval, force_install=yes)
169 AC_SUBST(force_install)
171 dnl On some platforms we allow dropping compatibility with all kernel
173 AC_ARG_ENABLE(kernel,
174 [ --enable-kernel=VERSION compile for compatibility with kernel not older
176 minimum_kernel=$enableval)
177 dnl Prevent unreasonable values.
178 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
179 # Better nothing than this.
182 if test "$minimum_kernel" = current; then
183 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
189 # The way shlib-versions is used to generate soversions.mk uses a
190 # fairly simplistic model for name recognition that can't distinguish
191 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
192 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
193 # tell. This doesn't get used much beyond that, so it's fairly safe.
198 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
202 # We keep the original values in `$config_*' and never modify them, so we
203 # can write them unchanged into config.make. Everything else uses
204 # $machine, $vendor, and $os, and changes them whenever convenient.
205 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
207 # Some configurations imply other options.
209 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
210 # These systems always use GNU tools.
211 gnu_ld=yes gnu_as=yes ;;
214 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
215 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
217 gnu* | linux* | sysv4* | solaris2* | irix6*)
218 # These systems (almost) always use the ELF format.
223 machine=$config_machine
224 vendor=$config_vendor
227 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
229 if test "$machine" = rs6000; then
234 ### I put this here to prevent those annoying emails from people who cannot
235 ### read and try to compile glibc on unsupported platforms. --drepper
237 ### By using the undocumented --enable-hacker-mode option for configure
238 ### one can skip this test to make the configuration not fail for unsupported
241 if test -z "$enable_hacker_mode"; then
242 case "$machine-$host_os" in
243 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
246 echo "*** The GNU C library is currently not available for this platform."
247 echo "*** So far nobody cared to port it and if there is no volunteer it"
248 echo "*** might never happen. So, if you have interest to see glibc on"
249 echo "*** this platform visit"
250 echo "*** http://www.gnu.org/software/libc/porting.html"
251 echo "*** and join the group of porters"
257 dnl We need to use [ and ] for other purposes for a while now.
259 # Expand the configuration machine name into a subdirectory by architecture
260 # type and particular chip.
262 a29k | am29000) base_machine=a29k machine=a29k ;;
263 alpha*) base_machine=alpha machine=alpha/$machine ;;
264 arm*) base_machine=arm machine=arm/$machine ;;
265 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
266 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
267 hppa*) base_machine=hppa machine=hppa/$machine ;;
268 i[3456]86) base_machine=i386 machine=i386/$machine ;;
269 ia64) base_machine=ia64 machine=ia64 ;;
270 m680?0) base_machine=m68k machine=m68k/$machine ;;
271 m68k) base_machine=m68k machine=m68k/m68020 ;;
272 m88???) base_machine=m88k machine=m88k/$machine ;;
273 m88k) base_machine=m88k machine=m88k/m88100 ;;
274 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
275 mips*) base_machine=mips
277 IP22) machine=mips/mips3 ;;
278 *) machine=mips/$machine ;;
280 sh3*) base_machine=sh machine=sh/sh3 ;;
281 sh4*) base_machine=sh machine=sh/sh4 ;;
283 base_machine=sparc machine=sparc/sparc32 ;;
284 sparcv8 | supersparc | hypersparc)
285 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
286 sparcv8plus | sparcv8plusa | sparcv9)
287 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
288 sparc64 | ultrasparc)
289 base_machine=sparc machine=sparc/sparc64 ;;
292 AC_SUBST(base_machine)
294 if test "$base_machine" = "i386"; then
295 AC_DEFINE(USE_REGPARMS)
298 # Compute the list of sysdep directories for this configuration.
299 # This can take a while to compute.
300 sysdep_dir=$srcdir/sysdeps
301 AC_MSG_CHECKING(sysdep dirs)
302 dnl We need to use [ and ] for other purposes for a while now.
304 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
305 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
310 netbsd* | 386bsd* | freebsd* | bsdi*)
311 base_os=unix/bsd/bsd4.4 ;;
312 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
314 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
317 base_os=unix/sysv/irix6/$os ;;
319 base_os=unix/sysv/sysv4 ;;
321 base_os=unix/sysv/hpux/$os ;;
323 base_os=unix/sysv/aix/aix4.3 ;;
325 base_os=standalone ;;
330 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
333 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
337 o=`echo $tail | sed 's/[0-9]*$//'`
338 if test $o != $tail; then
341 # For linux-gnu, try linux-gnu, then linux.
342 o=`echo $tail | sed 's/-.*$//'`
343 if test $o != $tail; then
347 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
350 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
356 # For sparc/sparc32, try sparc/sparc32 and then sparc.
359 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
361 # Prepend the machine's FPU directory unless --without-fp.
362 if test "$with_fp" = yes; then
369 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
372 # Find what sysdep directories exist.
374 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
375 for d in $add_ons_pfx ''; do
376 for b in $base ''; do
377 for m0 in $mach ''; do
378 for v in /$vendor ''; do
379 test "$v" = / && continue
380 for o in /$ostry ''; do
381 test "$o" = / && continue
382 for m in $mach ''; do
383 if test "$m0$b$v$o$m"; then
384 try="${d}sysdeps$m0$b$v$o$m"
385 test -n "$enable_debug_configure" &&
386 echo "$0 [DEBUG]: try $try" >&2
387 if test -d $srcdir/$try; then
388 sysnames="$sysnames $try"
389 { test -n "$o" || test -n "$b"; } && os_used=t
390 { test -n "$m" || test -n "$m0"; } && machine_used=t
401 if test -z "$os_used" && test "$os" != none; then
402 AC_MSG_ERROR(Operating system $os is not supported.)
404 if test -z "$machine_used" && test "$machine" != none; then
405 AC_MSG_ERROR(The $machine is not supported.)
408 # We have now validated the configuration.
411 # If using ELF, look for an `elf' subdirectory of each machine directory.
412 # We prepend these rather than inserting them whereever the machine appears
413 # because things specified by the machine's ELF ABI should override
414 # OS-specific things, and should always be the same for any OS on the
415 # machine (otherwise what's the point of an ABI?).
416 if test "$elf" = yes; then
418 for d in $add_ons_pfx ''; do
420 if test -d $srcdir/${d}sysdeps$m/elf; then
421 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
425 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
429 # Expand the list of system names into a full list of directories
430 # from each element's parent name and Implies file (if present).
433 while test $# -gt 0; do
437 case " $names " in *" $name "*)
438 # Already in the list.
442 # Report each name as we discover it, so there is no long pause in output.
443 echo $ac_n "$name $ac_c" >&AC_FD_MSG
445 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
449 *) xsrcdir=$srcdir/ ;;
451 test -n "$enable_debug_configure" &&
452 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
454 if test -f $xsrcdir$name/Implies; then
455 # Collect more names from the `Implies' file (removing comments).
456 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
458 for x in $implied_candidate; do
459 if test -d $xsrcdir$name_base/$x; then
460 implied="$implied $name_base/$x";
462 AC_MSG_WARN($name/Implies specifies nonexistent $x)
469 # Add NAME to the list of names.
472 # Find the parent of NAME, using the empty string if it has none.
474 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
477 # Add the names implied by NAME, and NAME's parent (if it has one), to
478 # the list of names to be processed (the argument list). We prepend the
479 # implied names to the list and append the parent. We want implied
480 # directories to come before further directories inferred from the
481 # configuration components; this ensures that for sysv4, unix/common
482 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
484 sysnames="`echo $implied $* $parent`"
485 test -n "$sysnames" && set $sysnames
488 # Add the default directories.
489 default_sysnames=sysdeps/generic
490 if test "$elf" = yes; then
491 default_sysnames="sysdeps/generic/elf $default_sysnames"
493 sysnames="$names $default_sysnames"
495 # The other names were emitted during the scan.
496 AC_MSG_RESULT($default_sysnames)
502 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
503 # The makefiles need to use a different form to find it in $srcdir.
504 INSTALL='\$(..)./scripts/install-sh -c'
508 # We need the physical current working directory. We cannot use the
509 # "pwd -P" shell builtin since that's not portable. Instead we try to
510 # find a pwd binary. Note that assigning to the PWD environment
511 # variable might have some interesting side effects, so we don't do
513 AC_PATH_PROG(PWD_P, pwd, no)
514 if test "$PWD_P" = no; then
515 AC_MSG_ERROR(*** A pwd binary could not be found.)
518 # These programs are version sensitive.
519 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
520 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
521 [version \([egcygnustpi-]*[0-9.]*\)],
522 [egcs-2.9[1-9].*|egcs-2.90.2[789]|egcs-2.90.[3-9][0-9]|*gcc-2.9[1-9].*|pgcc-2.90.2[789]|pgcc-2.90.[3-9][0-9]|*2.8.[1-9]*|*2.9|*2.9.[0-9]*|2.9[5-9]*|cygnus-2.9[1-9]*|gcc-2.9[5-9]|gcc-2.1[0-9][0-9]|sgicc-*],
524 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
525 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
526 [3.75 | 3.76.[1-9]* | 3.7[789]* | 3.[89]*], critic_missing=t)
528 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
529 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
530 [0.[1-9][0-9].* | [1-9].*], MSGFMT=: aux_missing=t)
531 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
532 [GNU texinfo.* \([0-9][0-9.]*\)],
533 [3.1[1-9] | 3.[2-9][0-9] | 4.* | 1.6[89] | 1.7[0-9]], MAKEINFO=: aux_missing=t)
534 AC_CHECK_PROG_VER(SED, gsed sed, --version,
535 [GNU sed version \([0-9]*\.[0-9.]*\)],
536 [3.0[2-9]|3.[1-9]*|[4-9]*], SED=: aux_missing=t)
538 if test -n "$critic_missing"; then
540 *** Some critical program is missing or too old.
541 *** Check the INSTALL file for required versions.])
544 test -n "$aux_missing" && AC_MSG_WARN([
545 *** An auxiliary program is missing or too old;
546 *** some features will be disabled.
547 *** Check the INSTALL file for required versions.])
549 # glibcbug.in wants to know the compiler version.
550 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
555 if test $host != $build; then
556 AC_CHECK_PROGS(BUILD_CC, gcc cc)
558 AC_SUBST(cross_compiling)
561 AC_CHECK_TOOL(MIG, mig)
563 # if using special system headers, find out the compiler's sekrit
564 # header directory and add that to the list. NOTE: Only does the right
565 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
566 if test -n "$sysheaders"; then
567 ccheaders=`$CC -print-file-name=include`
568 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
570 AC_SUBST(SYSINCLUDES)
572 # check if ranlib is necessary
573 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
574 cat > conftest.c <<EOF
579 $CC $CFLAGS -c conftest.c
580 $AR cr conftest.a conftest.c
581 cp conftest.a conftest2.a
583 if cmp -s conftest.a conftest2.a; then
584 libc_cv_ranlib_necessary=no
586 libc_cv_ranlib_necessary=yes
589 if test "$libc_cv_ranlib_necessary" = no; then
593 # Test if LD_LIBRARY_PATH contains the notation for the current directory
594 # since this would lead to problems installing/building glibc.
595 # LD_LIBRARY_PATH contains the current directory if one of the following
597 # - one of the terminals (":" and ";") is the first or last sign
598 # - two terminals occur directly after each other
599 # - the path contains an element with a dot in it
600 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
602 case ${LD_LIBRARY_PATH} in
603 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
604 ld_library_path_setting="contains current directory"
607 ld_library_path_setting="ok"
611 AC_MSG_RESULT($ld_library_path_setting)
612 if test "$ld_library_path_setting" != "ok"; then
614 *** LD_LIBRARY_PATH shouldn't contain the current directory when
615 *** building glibc. Please change the environment variable
616 *** and run configure again.])
619 AC_PATH_PROG(BASH, bash, no)
620 if test "$BASH" != no &&
621 $BASH -c 'test "$BASH_VERSINFO" \
622 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
623 libc_cv_have_bash2=yes
625 libc_cv_have_bash2=no
627 AC_SUBST(libc_cv_have_bash2)
629 dnl We need a ksh compatible shell for tzselect.
630 if test "$BASH" = no; then
631 AC_PATH_PROG(KSH, ksh, no)
632 if test "$KSH" = no; then
642 AC_SUBST(libc_cv_have_ksh)
645 AC_PATH_PROG(PERL, perl, no)
646 if test "$PERL" != no &&
647 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
650 AC_PATH_PROG(INSTALL_INFO, install-info, no,
651 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
652 if test "$INSTALL_INFO" != "no"; then
653 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
655 # There is a hard ^_ on the next line. I am open to better ideas.
657 echo 'File: dir Node: Top This is the top of the INFO tree'
658 echo '* Menu:') >conftest.d/dir
659 (echo 'INFO-DIR-SECTION i-d-s works'
660 echo 'START-INFO-DIR-ENTRY'
661 echo '* Prog: (prog). Program.'
662 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
663 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
665 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
666 then libc_cv_old_debian_install_info=no
667 else libc_cv_old_debian_install_info=yes
669 else libc_cv_old_debian_install_info=no testfailed=t
672 if test -n "$testfailed"
673 then AC_MSG_WARN([install-info errored out, check config.log])
675 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
677 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
679 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
680 echo '#include <stddef.h>
681 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
682 if eval "$ac_cpp conftest.c 2>/dev/null" \
683 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
684 libc_cv_signed_size_t=no
686 libc_cv_signed_size_t=yes
689 if test $libc_cv_signed_size_t = yes; then
690 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
691 cat >> confdefs.h <<\EOF
693 #define __SIZE_TYPE__ unsigned
697 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
699 [#define __need_size_t
700 #define __need_wchar_t
703 #include <stddef.h>], [size_t size; wchar_t wchar;
705 #error stddef.h ignored __need_*
707 if (&size == NULL || &wchar == NULL) abort ();],
708 libc_cv_friendly_stddef=yes,
709 libc_cv_friendly_stddef=no)])
710 if test $libc_cv_friendly_stddef = yes; then
711 config_vars="$config_vars
712 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
715 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
716 libc_cv_need_minus_P, [dnl
717 cat > conftest.S <<EOF
718 #include "confdefs.h"
719 /* Nothing whatsoever. */
721 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
722 libc_cv_need_minus_P=no
724 libc_cv_need_minus_P=yes
727 if test $libc_cv_need_minus_P = yes; then
728 config_vars="$config_vars
729 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
732 AC_MSG_CHECKING(whether .text pseudo-op must be used)
733 AC_CACHE_VAL(libc_cv_dot_text, [dnl
734 cat > conftest.s <<EOF
738 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
739 libc_cv_dot_text=.text
742 if test -z "$libc_cv_dot_text"; then
748 AC_CACHE_CHECK(for assembler global-symbol directive,
749 libc_cv_asm_global_directive, [dnl
750 libc_cv_asm_global_directive=UNKNOWN
751 for ac_globl in .globl .global .EXPORT; do
752 cat > conftest.s <<EOF
757 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
758 libc_cv_asm_global_directive=${ac_globl}
761 test $libc_cv_asm_global_directive != UNKNOWN && break
763 if test $libc_cv_asm_global_directive = UNKNOWN; then
764 AC_MSG_ERROR(cannot determine asm global directive)
766 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
769 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
770 cat > conftest.s <<EOF
773 .set glibc_conftest_frobozz,foo
774 $libc_cv_asm_global_directive glibc_conftest_frobozz
776 # The alpha-dec-osf1 assembler gives only a warning for `.set'
777 # (but it doesn't work), so we must do a linking check to be sure.
778 cat > conftest1.c <<\EOF
779 extern int glibc_conftest_frobozz;
780 main () { printf ("%d\n", glibc_conftest_frobozz); }
782 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
783 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
784 libc_cv_asm_set_directive=yes
786 libc_cv_asm_set_directive=no
789 if test $libc_cv_asm_set_directive = yes; then
790 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
793 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
794 [cat > conftest.s <<EOF
797 .symver _sym,sym@VERS
799 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
800 libc_cv_asm_symver_directive=yes
802 libc_cv_asm_symver_directive=no
805 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
806 if test $libc_cv_asm_symver_directive = yes; then
807 cat > conftest.s <<EOF
810 .symver _sym,sym@VERS
812 cat > conftest.map <<EOF
821 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
822 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
823 -nostartfiles -nostdlib
824 -Wl,--version-script,conftest.map
827 libc_cv_ld_version_script_option=yes
829 libc_cv_ld_version_script_option=no
832 libc_cv_ld_version_script_option=no
835 libc_cv_ld_version_script_option=no
838 if test $shared != no &&
839 test $libc_cv_asm_symver_directive = yes &&
840 test $libc_cv_ld_version_script_option = yes &&
841 test $enable_versioning = yes; then
843 AC_DEFINE(DO_VERSIONING)
849 if test $shared != no && test $VERSIONING = no; then
851 *** WARNING: You should not compile GNU libc without versioning. Not using
852 *** versioning will introduce incompatibilities so that old binaries
853 *** will not run anymore.
854 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
856 if test $elf = yes; then
857 AC_CACHE_CHECK(for .previous assembler directive,
858 libc_cv_asm_previous_directive, [dnl
859 cat > conftest.s <<EOF
863 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
864 libc_cv_asm_previous_directive=yes
866 libc_cv_asm_previous_directive=no
869 if test $libc_cv_asm_previous_directive = yes; then
870 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
872 AC_CACHE_CHECK(for .popsection assembler directive,
873 libc_cv_asm_popsection_directive, [dnl
874 cat > conftest.s <<EOF
875 .pushsection foo_section
878 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
879 libc_cv_asm_popsection_directive=yes
881 libc_cv_asm_popsection_directive=no
884 if test $libc_cv_asm_popsection_directive = yes; then
885 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
888 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
889 libc_cv_asm_protected_directive, [dnl
890 cat > conftest.s <<EOF
896 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
897 libc_cv_asm_protected_directive=yes
899 libc_cv_asm_protected_directive=no
902 AC_SUBST(libc_cv_asm_protected_directive)
905 if test $elf != yes; then
906 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
907 [AC_TRY_COMPILE(, [asm (".section .init");
908 asm (".section .fini");
909 asm ("${libc_cv_dot_text}");],
910 libc_cv_have_initfini=yes,
911 libc_cv_have_initfini=no)])
912 AC_SUBST(libc_cv_have_initfini)dnl
913 if test $libc_cv_have_initfini = yes; then
914 AC_DEFINE(HAVE_INITFINI)
918 if test $elf = yes -a $gnu_ld = yes; then
919 AC_CACHE_CHECK(whether cc puts quotes around section names,
920 libc_cv_have_section_quotes,
921 [cat > conftest.c <<EOF
923 __attribute__ ((section ("bar"))) = 1;
925 if ${CC-cc} -S conftest.c -o conftest.s; then
926 if grep '\.section.*"bar"' conftest.s >/dev/null; then
927 libc_cv_have_section_quotes=yes
929 libc_cv_have_section_quotes=no
932 libc_cv_have_section_quotes=unknown
936 if test $libc_cv_have_section_quotes = yes; then
937 AC_DEFINE(HAVE_SECTION_QUOTES)
941 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
942 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
943 [cat > conftest.$ac_ext <<EOF
944 dnl This sometimes fails to find confdefs.h, for some reason.
945 dnl [#]line __oline__ "[$]0"
946 [#]line __oline__ "configure"
947 #include "confdefs.h"
948 void underscore_test(void) {
951 if AC_TRY_EVAL(ac_compile); then
952 if grep _underscore_test conftest* >/dev/null; then
953 ifelse([$1], , :, [rm -f conftest*
956 ifelse([$2], , , [rm -f conftest*
960 echo "configure: failed program was:" >&AC_FD_CC
961 cat conftest.$ac_ext >&AC_FD_CC
962 ifelse([$2], , , [rm -f conftest*
967 if test $elf = yes; then
968 libc_cv_asm_underscores=no
970 if test $ac_cv_prog_cc_works = yes; then
971 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
972 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
973 libc_cv_asm_underscores=yes,
974 libc_cv_asm_underscores=no)])
976 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
977 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
978 libc_cv_asm_underscores=no)])
981 if test $libc_cv_asm_underscores = no; then
982 AC_DEFINE(NO_UNDERSCORES)
985 if test $elf = yes; then
986 libc_cv_weak_symbols=yes
989 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
991 cat > conftest.s <<EOF
993 ${libc_cv_asm_global_directive} foo
998 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
999 libc_cv_asm_weak_directive=yes
1001 libc_cv_asm_weak_directive=no
1005 if test $libc_cv_asm_weak_directive = no; then
1006 AC_CACHE_CHECK(for assembler .weakext directive,
1007 libc_cv_asm_weakext_directive,
1009 cat > conftest.s <<EOF
1011 ${libc_cv_asm_global_directive} foo
1015 ${libc_cv_asm_global_directive} baz
1018 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
1019 libc_cv_asm_weakext_directive=yes
1021 libc_cv_asm_weakext_directive=no
1027 if test $libc_cv_asm_weak_directive = yes; then
1028 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1029 elif test $libc_cv_asm_weakext_directive = yes; then
1030 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1033 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1034 cat > conftest.c <<\EOF
1039 dnl No \ in command here because it ends up inside ''.
1040 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1041 -nostdlib -nostartfiles -Wl,--no-whole-archive
1042 -o conftest conftest.c 1>&AC_FD_CC]); then
1043 libc_cv_ld_no_whole_archive=yes
1045 libc_cv_ld_no_whole_archive=no
1048 if test $libc_cv_ld_no_whole_archive = yes; then
1049 no_whole_archive=-Wl,--no-whole-archive
1051 AC_SUBST(no_whole_archive)dnl
1053 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1054 cat > conftest.c <<\EOF
1059 dnl No \ in command here because it ends up inside ''.
1060 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1061 -nostdlib -nostartfiles -fexceptions
1062 -o conftest conftest.c 1>&AC_FD_CC]); then
1063 libc_cv_gcc_exceptions=yes
1065 libc_cv_gcc_exceptions=no
1068 if test $libc_cv_gcc_exceptions = yes; then
1069 exceptions=-fexceptions
1071 AC_SUBST(exceptions)dnl
1073 if test "$base_machine" = alpha ; then
1074 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
1075 cat > conftest.c <<\EOF
1079 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
1081 libc_cv_gcc_alpha_ng_prefix=yes
1083 libc_cv_gcc_alpha_ng_prefix=no
1086 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
1087 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
1089 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
1093 if test "$host_cpu" = powerpc ; then
1094 # Check for a bug present in at least versions 2.8.x of GCC
1095 # and versions 1.0.x of EGCS.
1096 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1097 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1098 libc_cv_c_asmcr0_bug='no',
1099 libc_cv_c_asmcr0_bug='yes')])
1100 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1101 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1105 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1106 [cat > conftest.c <<EOF
1107 #line __oline__ "configure"
1108 static char __EH_FRAME_BEGIN__[];
1111 #ifdef CHECK__register_frame
1112 __register_frame (__EH_FRAME_BEGIN__);
1113 __deregister_frame (__EH_FRAME_BEGIN__);
1115 #ifdef CHECK__register_frame_info
1116 __register_frame_info (__EH_FRAME_BEGIN__);
1117 __deregister_frame_info (__EH_FRAME_BEGIN__);
1122 /* FIXME: this is fragile. */
1132 dnl No \ in command here because it ends up inside ''.
1133 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1134 -nostdlib -nostartfiles
1135 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1136 libc_cv_gcc_dwarf2_unwind_info=static
1138 libc_cv_gcc_dwarf2_unwind_info=no
1140 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1141 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1142 -nostdlib -nostartfiles
1143 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1144 libc_cv_gcc_dwarf2_unwind_info=yes
1146 libc_cv_gcc_dwarf2_unwind_info=no
1150 case $libc_cv_gcc_dwarf2_unwind_info in
1152 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1155 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1156 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1160 dnl Check whether compiler understands __builtin_expect.
1161 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1162 [cat > conftest.c <<EOF
1163 #line __oline__ "configure"
1166 a = __builtin_expect (a, 10);
1167 return a == 10 ? 0 : 1;
1170 dnl No \ in command here because it ends up inside ''.
1171 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1172 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1173 libc_cv_gcc_builtin_expect=yes
1175 libc_cv_gcc_builtin_expect=no
1178 if test "$libc_cv_gcc_builtin_expect" = yes; then
1179 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1182 dnl Check whether the compiler supports subtraction of local labels.
1183 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1184 [cat > conftest.c <<EOF
1186 #line __oline__ "configure"
1189 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1190 void *p = &&l1 + ar[a];
1199 dnl No \ in command here because it ends up inside ''.
1200 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1201 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1202 libc_cv_gcc_subtract_local_labels=yes
1204 libc_cv_gcc_subtract_local_labels=no
1207 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1208 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1211 dnl Check whether we have the gd library available.
1212 AC_MSG_CHECKING(for libgd)
1213 old_CFLAGS="$CFLAGS"
1214 CFLAGS="$CFLAGS $libgd_include"
1215 old_LDFLAGS="$LDFLAGS"
1216 LDFLAGS="$LDFLAGS $libgd_ldflags"
1218 LIBS="$LIBS -lgd -lpng -lz"
1219 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1220 CFLAGS="$old_CFLAGS"
1221 LDFLAGS="$old_LDFLAGS"
1223 AC_MSG_RESULT($LIBGD)
1226 dnl check for the size of 'long double'.
1227 AC_CHECK_SIZEOF(long double, 0)
1228 sizeof_long_double=$ac_cv_sizeof_long_double
1229 AC_SUBST(sizeof_long_double)
1231 ### End of automated tests.
1232 ### Now run sysdeps configure fragments.
1234 # sysdeps configure fragments may set these with files to be linked below.
1238 # They also can set these variables.
1240 ldd_rewrite_script=no
1242 # Iterate over all the sysdep directories we will use, running their
1243 # configure fragments, and looking for a uname implementation.
1245 for dir in $sysnames; do
1248 *) dest=$srcdir/$dir ;;
1250 if test -r $dest/configure; then
1251 AC_MSG_RESULT(running configure fragment for $dest)
1255 if test -z "$uname"; then
1256 if test -r $dest/uname.c ||
1257 test -r $dest/uname.S ||
1258 { test -r $dest/syscalls.list &&
1259 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1266 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1268 # If we will use the generic uname implementation, we must figure out what
1269 # it will say by examining the system, and write the results in config-name.h.
1270 if test "$uname" = "sysdeps/generic"; then
1273 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1275 if test $uname_sysname != $config_os; then
1276 config_release=`echo $config_os | sed s/$uname_sysname//`
1279 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1280 if test -r /vmunix; then
1281 kernel_id=`strings /vmunix | grep UNIX`
1282 elif test -r /dynix; then
1283 kernel_id=`strings /dynix | grep DYNIX`
1289 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1290 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1292 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1294 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1295 != x$config_release; then
1296 # The configuration release is a substring of the kernel release.
1297 libc_cv_uname_release=$kernel_release
1298 elif test x$config_release != x; then
1299 libc_cv_uname_release=$config_release
1300 elif test x$kernel_release != x; then
1301 libc_cv_uname_release=$kernel_release
1303 libc_cv_uname_release=unknown
1305 uname_release="$libc_cv_uname_release"
1307 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1308 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1310 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1312 if test -n "$kernel_version"; then
1313 libc_cv_uname_version="$kernel_version"
1315 libc_cv_uname_version=unknown
1317 uname_version="$libc_cv_uname_version"
1319 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1320 config_uname=config-name.h:config-name.in
1322 # For non-generic uname, we don't need to create config-name.h at all.
1326 AC_MSG_CHECKING(stdio selection)
1329 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1330 default) stdio=stdio ;;
1332 AC_MSG_RESULT($stdio)
1334 # Test for old glibc 2.0.x headers so that they can be removed properly
1335 # Search only in includedir.
1336 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1337 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1339 old_glibc_headers=yes
1341 old_glibc_headers=no
1343 AC_MSG_RESULT($old_glibc_headers)
1344 if test ${old_glibc_headers} = yes; then
1345 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1346 AC_MSG_WARN(*** be removed.)
1348 AC_SUBST(old_glibc_headers)
1350 AC_SUBST(libc_cv_slibdir)
1351 AC_SUBST(libc_cv_localedir)
1352 AC_SUBST(libc_cv_sysconfdir)
1353 AC_SUBST(libc_cv_rootsbindir)
1355 AC_SUBST(use_ldconfig)
1356 AC_SUBST(ldd_rewrite_script)
1358 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1359 if test $gnu_ld = yes; then
1360 AC_DEFINE(HAVE_GNU_LD)
1362 if test $gnu_as = yes; then
1363 AC_DEFINE(HAVE_GNU_AS)
1365 if test $elf = yes; then
1371 if test $shared = default; then
1372 if test $gnu_ld = yes; then
1375 # For now we do not assume shared libs are available. In future more
1376 # tests might become available.
1381 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1383 cat > conftest.c <<EOF
1384 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1385 # error PIC is default.
1388 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1392 AC_SUBST(pic_default)
1397 AC_SUBST(static_nss)
1398 AC_SUBST(nopic_initfini)
1403 *door*) linux_doors=yes ;;
1404 *) linux_doors=no ;;
1406 AC_SUBST(linux_doors)
1408 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1411 config_makefile=Makefile
1414 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1415 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1419 echo '*** Do NOT install this release on any production system!'
1420 echo '*** We are in early testing stages.'
1422 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1423 case $CONFIG_FILES in *config.make*)
1424 echo "$config_vars" >> config.make;;
1426 test -d bits || mkdir bits], [config_vars='$config_vars'])