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-memprofstat.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.
185 # The way shlib-versions is used to generate soversions.mk uses a
186 # fairly simplistic model for name recognition that can't distinguish
187 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
188 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
189 # tell. This doesn't get used much beyond that, so it's fairly safe.
194 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
198 # We keep the original values in `$config_*' and never modify them, so we
199 # can write them unchanged into config.make. Everything else uses
200 # $machine, $vendor, and $os, and changes them whenever convenient.
201 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
203 # Some configurations imply other options.
205 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
206 # These systems always use GNU tools.
207 gnu_ld=yes gnu_as=yes ;;
210 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
211 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
213 gnu* | linux* | sysv4* | solaris2* | irix6*)
214 # These systems (almost) always use the ELF format.
219 machine=$config_machine
220 vendor=$config_vendor
224 ### I put this here to prevent those annoying emails from people who cannot
225 ### read and try to compile glibc on unsupported platforms. --drepper
227 ### By using the undocumented --enable-hacker-mode option for configure
228 ### one can skip this test to make the configuration not fail for unsupported
231 if test -z "$enable_hacker_mode"; then
232 case "$machine-$host_os" in
233 *-linux* | *-gnu* | arm*-none*)
236 echo "*** The GNU C library is currently not available for this platform."
237 echo "*** So far nobody cared to port it and if there is no volunteer it"
238 echo "*** might never happen. So, if you have interest to see glibc on"
239 echo "*** this platform visit"
240 echo "*** http://www.gnu.org/software/libc/porting.html"
241 echo "*** and join the group of porters"
247 dnl We need to use [ and ] for other purposes for a while now.
249 # Expand the configuration machine name into a subdirectory by architecture
250 # type and particular chip.
252 a29k | am29000) base_machine=a29k machine=a29k ;;
253 alpha*) base_machine=alpha machine=alpha/$machine ;;
254 arm*) base_machine=arm machine=arm/$machine ;;
255 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
256 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
257 hppa*) base_machine=hppa machine=hppa/$machine ;;
258 i[3456]86) base_machine=i386 machine=i386/$machine ;;
259 m680?0) base_machine=m68k machine=m68k/$machine ;;
260 m68k) base_machine=m68k machine=m68k/m68020 ;;
261 m88???) base_machine=m88k machine=m88k/$machine ;;
262 m88k) base_machine=m88k machine=m88k/m88100 ;;
263 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
264 mips*) base_machine=mips
266 IP22) machine=mips/mips3 ;;
267 *) machine=mips/$machine ;;
270 base_machine=sparc machine=sparc/sparc32 ;;
271 sparcv8 | supersparc | hypersparc)
272 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
273 sparcv8plus | sparcv8plusa | sparcv9)
274 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
275 sparc64 | ultrasparc)
276 base_machine=sparc machine=sparc/sparc64 ;;
279 AC_SUBST(base_machine)
281 if test "$base_machine" = "i386"; then
282 AC_DEFINE(USE_REGPARMS)
285 # Compute the list of sysdep directories for this configuration.
286 # This can take a while to compute.
287 sysdep_dir=$srcdir/sysdeps
288 AC_MSG_CHECKING(sysdep dirs)
289 dnl We need to use [ and ] for other purposes for a while now.
291 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
292 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
297 netbsd* | 386bsd* | freebsd* | bsdi*)
298 base_os=unix/bsd/bsd4.4 ;;
299 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
301 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
304 base_os=unix/sysv/irix6/$os ;;
306 base_os=unix/sysv/sysv4 ;;
308 base_os=unix/sysv/hpux/$os ;;
310 base_os=standalone ;;
315 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
318 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
322 o=`echo $tail | sed 's/[0-9]*$//'`
323 if test $o != $tail; then
326 # For linux-gnu, try linux-gnu, then linux.
327 o=`echo $tail | sed 's/-.*$//'`
328 if test $o != $tail; then
332 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
335 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
341 # For sparc/sparc32, try sparc/sparc32 and then sparc.
344 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
346 # Prepend the machine's FPU directory unless --without-fp.
347 if test "$with_fp" = yes; then
354 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
357 # Find what sysdep directories exist.
359 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
360 for d in $add_ons_pfx ''; do
361 for b in $base ''; do
362 for m0 in $mach ''; do
363 for v in /$vendor ''; do
364 test "$v" = / && continue
365 for o in /$ostry ''; do
366 test "$o" = / && continue
367 for m in $mach ''; do
368 if test "$m0$b$v$o$m"; then
369 try="${d}sysdeps$m0$b$v$o$m"
370 test -n "$enable_debug_configure" &&
371 echo "$0 [DEBUG]: try $try" >&2
372 if test -d $srcdir/$try; then
373 sysnames="$sysnames $try"
374 { test -n "$o" || test -n "$b"; } && os_used=t
375 { test -n "$m" || test -n "$m0"; } && machine_used=t
386 if test -z "$os_used" && test "$os" != none; then
387 AC_MSG_ERROR(Operating system $os is not supported.)
389 if test -z "$machine_used" && test "$machine" != none; then
390 AC_MSG_ERROR(The $machine is not supported.)
393 # We have now validated the configuration.
396 # If using ELF, look for an `elf' subdirectory of each machine directory.
397 # We prepend these rather than inserting them whereever the machine appears
398 # because things specified by the machine's ELF ABI should override
399 # OS-specific things, and should always be the same for any OS on the
400 # machine (otherwise what's the point of an ABI?).
401 if test "$elf" = yes; then
403 for d in $add_ons_pfx ''; do
405 if test -d $srcdir/${d}sysdeps$m/elf; then
406 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
410 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
414 # Expand the list of system names into a full list of directories
415 # from each element's parent name and Implies file (if present).
418 while test $# -gt 0; do
422 case " $names " in *" $name "*)
423 # Already in the list.
427 # Report each name as we discover it, so there is no long pause in output.
428 echo $ac_n "$name $ac_c" >&AC_FD_MSG
430 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
434 *) xsrcdir=$srcdir/ ;;
436 test -n "$enable_debug_configure" &&
437 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
439 if test -f $xsrcdir$name/Implies; then
440 # Collect more names from the `Implies' file (removing comments).
441 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
443 for x in $implied_candidate; do
444 if test -d $xsrcdir$name_base/$x; then
445 implied="$implied $name_base/$x";
447 AC_MSG_WARN($name/Implies specifies nonexistent $x)
454 # Add NAME to the list of names.
457 # Find the parent of NAME, using the empty string if it has none.
459 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
462 # Add the names implied by NAME, and NAME's parent (if it has one), to
463 # the list of names to be processed (the argument list). We prepend the
464 # implied names to the list and append the parent. We want implied
465 # directories to come before further directories inferred from the
466 # configuration components; this ensures that for sysv4, unix/common
467 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
469 sysnames="`echo $implied $* $parent`"
470 test -n "$sysnames" && set $sysnames
473 # Add the default directories.
474 default_sysnames=sysdeps/generic
475 if test "$elf" = yes; then
476 default_sysnames="sysdeps/generic/elf $default_sysnames"
478 sysnames="$names $default_sysnames"
480 # The other names were emitted during the scan.
481 AC_MSG_RESULT($default_sysnames)
487 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
488 # The makefiles need to use a different form to find it in $srcdir.
489 INSTALL='\$(..)./scripts/install-sh -c'
493 # These programs are version sensitive.
494 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
495 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
496 [version \([egcygnustp-]*[0-9.]*\)],
497 [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]],
499 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
500 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
501 [3.75 | 3.76.[1-9]* | 3.7[789]* | 3.[89]*], critic_missing=t)
503 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
504 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
505 [0.[1-9][0-9].* | [1-9].*], MSGFMT=: aux_missing=t)
506 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
507 [GNU texinfo.* \([0-9][0-9.]*\)],
508 [3.1[1-9] | 3.[2-9][0-9] | 4.* | 1.6[89] | 1.7[0-9]], MAKEINFO=: aux_missing=t)
510 if test -n "$critic_missing"; then
512 *** Some critical program is missing or too old.
513 *** Check the INSTALL file for required versions.])
516 test -n "$aux_missing" && AC_MSG_WARN([
517 *** An auxiliary program is missing or too old;
518 *** some features will be disabled.
519 *** Check the INSTALL file for required versions.])
521 # glibcbug.in wants to know the compiler version.
522 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
527 if test $host != $build; then
528 AC_CHECK_PROGS(BUILD_CC, gcc cc)
530 AC_SUBST(cross_compiling)
533 AC_CHECK_TOOL(MIG, mig)
535 # if using special system headers, find out the compiler's sekrit
536 # header directory and add that to the list. NOTE: Only does the right
537 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
538 if test -n "$sysheaders"; then
539 ccheaders=`$CC -print-file-name=include`
540 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
542 AC_SUBST(SYSINCLUDES)
544 # check if ranlib is necessary
545 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
546 cat > conftest.c <<EOF
551 $CC $CFLAGS -c conftest.c
552 $AR cr conftest.a conftest.c
553 cp conftest.a conftest2.a
555 if cmp -s conftest.a conftest2.a; then
556 libc_cv_ranlib_necessary=no
558 libc_cv_ranlib_necessary=yes
561 if test "$libc_cv_ranlib_necessary" = no; then
565 # Test if LD_LIBRARY_PATH contains the notation for the current directory
566 # since this would lead to problems installing/building glibc.
567 # LD_LIBRARY_PATH contains the current directory if one of the following
569 # - one of the terminals (":" and ";") is the first or last sign
570 # - two terminals occur directly after each other
571 # - the path contains an element with a dot in it
572 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
574 case ${LD_LIBRARY_PATH} in
575 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
576 ld_library_path_setting="contains current directory"
579 ld_library_path_setting="ok"
583 AC_MSG_RESULT($ld_library_path_setting)
584 if test "$ld_library_path_setting" != "ok"; then
586 *** LD_LIBRARY_PATH shouldn't contain the current directory when
587 *** building glibc. Please change the environment variable
588 *** and run configure again.])
591 AC_PATH_PROG(BASH, bash, no)
592 if test "$BASH" != no &&
593 $BASH -c 'test "$BASH_VERSINFO" \
594 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
595 libc_cv_have_bash2=yes
597 libc_cv_have_bash2=no
599 AC_SUBST(libc_cv_have_bash2)
601 dnl We need a ksh compatible shell for tzselect.
602 if test "$BASH" = no; then
603 AC_PATH_PROG(KSH, ksh, no)
604 if test "$KSH" = no; then
614 AC_SUBST(libc_cv_have_ksh)
617 AC_PATH_PROG(PERL, perl, no)
619 AC_PATH_PROG(INSTALL_INFO, install-info, no,
620 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
621 AC_SUBST(INSTALL_INFO)
622 if test "$INSTALL_INFO" != "no"; then
623 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
625 # There is a hard ^_ on the next line. I am open to better ideas.
627 echo 'File: dir Node: Top This is the top of the INFO tree'
628 echo '* Menu:') >conftest.d/dir
629 (echo 'INFO-DIR-SECTION i-d-s works'
630 echo 'START-INFO-DIR-ENTRY'
631 echo '* Prog: (prog). Program.'
632 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
633 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
635 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
636 then libc_cv_old_debian_install_info=no
637 else libc_cv_old_debian_install_info=yes
639 else libc_cv_old_debian_install_info=no testfailed=t
642 if test -n "$testfailed"
643 then AC_MSG_WARN([install-info errored out, check config.log])
645 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
647 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
649 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
650 echo '#include <stddef.h>
651 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
652 if eval "$ac_cpp conftest.c 2>/dev/null" \
653 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
654 libc_cv_signed_size_t=no
656 libc_cv_signed_size_t=yes
659 if test $libc_cv_signed_size_t = yes; then
660 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
661 cat >> confdefs.h <<\EOF
663 #define __SIZE_TYPE__ unsigned
667 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
669 [#define __need_size_t
670 #define __need_wchar_t
673 #include <stddef.h>], [size_t size; wchar_t wchar;
675 #error stddef.h ignored __need_*
677 if (&size == NULL || &wchar == NULL) abort ();],
678 libc_cv_friendly_stddef=yes,
679 libc_cv_friendly_stddef=no)])
680 if test $libc_cv_friendly_stddef = yes; then
681 config_vars="$config_vars
682 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
685 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
686 libc_cv_need_minus_P, [dnl
687 cat > conftest.S <<EOF
688 #include "confdefs.h"
689 /* Nothing whatsoever. */
691 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
692 libc_cv_need_minus_P=no
694 libc_cv_need_minus_P=yes
697 if test $libc_cv_need_minus_P = yes; then
698 config_vars="$config_vars
699 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
702 AC_MSG_CHECKING(whether .text pseudo-op must be used)
703 AC_CACHE_VAL(libc_cv_dot_text, [dnl
704 cat > conftest.s <<EOF
708 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
709 libc_cv_dot_text=.text
712 if test -z "$libc_cv_dot_text"; then
718 AC_CACHE_CHECK(for assembler global-symbol directive,
719 libc_cv_asm_global_directive, [dnl
720 libc_cv_asm_global_directive=UNKNOWN
721 for ac_globl in .globl .global .EXPORT; do
722 cat > conftest.s <<EOF
727 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
728 libc_cv_asm_global_directive=${ac_globl}
731 test $libc_cv_asm_global_directive != UNKNOWN && break
733 if test $libc_cv_asm_global_directive = UNKNOWN; then
734 AC_MSG_ERROR(cannot determine asm global directive)
736 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
739 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
740 cat > conftest.s <<EOF
743 .set glibc_conftest_frobozz,foo
744 $libc_cv_asm_global_directive glibc_conftest_frobozz
746 # The alpha-dec-osf1 assembler gives only a warning for `.set'
747 # (but it doesn't work), so we must do a linking check to be sure.
748 cat > conftest1.c <<\EOF
749 extern int glibc_conftest_frobozz;
750 main () { printf ("%d\n", glibc_conftest_frobozz); }
752 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
753 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
754 libc_cv_asm_set_directive=yes
756 libc_cv_asm_set_directive=no
759 if test $libc_cv_asm_set_directive = yes; then
760 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
763 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
764 [cat > conftest.s <<EOF
767 .symver _sym,sym@VERS
769 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
770 libc_cv_asm_symver_directive=yes
772 libc_cv_asm_symver_directive=no
775 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
776 if test $libc_cv_asm_symver_directive = yes; then
777 cat > conftest.s <<EOF
780 .symver _sym,sym@VERS
782 cat > conftest.map <<EOF
791 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
792 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
793 -nostartfiles -nostdlib
794 -Wl,--version-script,conftest.map
797 libc_cv_ld_version_script_option=yes
799 libc_cv_ld_version_script_option=no
802 libc_cv_ld_version_script_option=no
805 libc_cv_ld_version_script_option=no
808 if test $libc_cv_asm_symver_directive = yes &&
809 test $libc_cv_ld_version_script_option = yes &&
810 test $enable_versioning = yes; then
812 AC_DEFINE(DO_VERSIONING)
818 if test $VERSIONING = no; then
820 *** WARNING: You should not compile GNU libc without versioning. Not using
821 *** versioning will introduce incompatibilities so that old binaries
822 *** will not run anymore.
823 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
825 if test $elf = yes; then
826 AC_CACHE_CHECK(for .previous assembler directive,
827 libc_cv_asm_previous_directive, [dnl
828 cat > conftest.s <<EOF
832 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
833 libc_cv_asm_previous_directive=yes
835 libc_cv_asm_previous_directive=no
838 if test $libc_cv_asm_previous_directive = yes; then
839 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
841 AC_CACHE_CHECK(for .popsection assembler directive,
842 libc_cv_asm_popsection_directive, [dnl
843 cat > conftest.s <<EOF
844 .pushsection foo_section
847 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
848 libc_cv_asm_popsection_directive=yes
850 libc_cv_asm_popsection_directive=no
853 if test $libc_cv_asm_popsection_directive = yes; then
854 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
859 if test $elf != yes; then
860 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
861 [AC_TRY_COMPILE(, [asm (".section .init");
862 asm (".section .fini");
863 asm ("${libc_cv_dot_text}");],
864 libc_cv_have_initfini=yes,
865 libc_cv_have_initfini=no)])
866 AC_SUBST(libc_cv_have_initfini)dnl
867 if test $libc_cv_have_initfini = yes; then
868 AC_DEFINE(HAVE_INITFINI)
872 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
873 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
874 [cat > conftest.$ac_ext <<EOF
875 dnl This sometimes fails to find confdefs.h, for some reason.
876 dnl [#]line __oline__ "[$]0"
877 [#]line __oline__ "configure"
878 #include "confdefs.h"
879 void underscore_test(void) {
882 if AC_TRY_EVAL(ac_compile); then
883 if grep _underscore_test conftest* >/dev/null; then
884 ifelse([$1], , :, [rm -f conftest*
887 ifelse([$2], , , [rm -f conftest*
891 echo "configure: failed program was:" >&AC_FD_CC
892 cat conftest.$ac_ext >&AC_FD_CC
893 ifelse([$2], , , [rm -f conftest*
898 if test $elf = yes; then
899 libc_cv_asm_underscores=no
901 if test $ac_cv_prog_cc_works = yes; then
902 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
903 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
904 libc_cv_asm_underscores=yes,
905 libc_cv_asm_underscores=no)])
907 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
908 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
909 libc_cv_asm_underscores=no)])
912 if test $libc_cv_asm_underscores = no; then
913 AC_DEFINE(NO_UNDERSCORES)
916 if test $elf = yes; then
917 libc_cv_weak_symbols=yes
920 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
922 cat > conftest.s <<EOF
924 ${libc_cv_asm_global_directive} foo
929 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
930 libc_cv_asm_weak_directive=yes
932 libc_cv_asm_weak_directive=no
936 if test $libc_cv_asm_weak_directive = no; then
937 AC_CACHE_CHECK(for assembler .weakext directive,
938 libc_cv_asm_weakext_directive,
940 cat > conftest.s <<EOF
942 ${libc_cv_asm_global_directive} foo
946 ${libc_cv_asm_global_directive} baz
949 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
950 libc_cv_asm_weakext_directive=yes
952 libc_cv_asm_weakext_directive=no
958 if test $libc_cv_asm_weak_directive = yes; then
959 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
960 elif test $libc_cv_asm_weakext_directive = yes; then
961 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
964 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
965 cat > conftest.c <<\EOF
970 dnl No \ in command here because it ends up inside ''.
971 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
972 -nostdlib -nostartfiles -Wl,--no-whole-archive
973 -o conftest conftest.c 1>&AC_FD_CC]); then
974 libc_cv_ld_no_whole_archive=yes
976 libc_cv_ld_no_whole_archive=no
979 if test $libc_cv_ld_no_whole_archive = yes; then
980 no_whole_archive=-Wl,--no-whole-archive
982 AC_SUBST(no_whole_archive)dnl
984 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
985 cat > conftest.c <<\EOF
990 dnl No \ in command here because it ends up inside ''.
991 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
992 -nostdlib -nostartfiles -fexceptions
993 -o conftest conftest.c 1>&AC_FD_CC]); then
994 libc_cv_gcc_exceptions=yes
996 libc_cv_gcc_exceptions=no
999 if test $libc_cv_gcc_exceptions = yes; then
1000 exceptions=-fexceptions
1002 AC_SUBST(exceptions)dnl
1004 if test "$base_machine" = alpha ; then
1005 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
1006 cat > conftest.c <<\EOF
1010 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
1012 libc_cv_gcc_alpha_ng_prefix=yes
1014 libc_cv_gcc_alpha_ng_prefix=no
1017 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
1018 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
1020 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
1024 if test "$host_cpu" = powerpc ; then
1025 # Check for a bug present in at least versions 2.8.x of GCC
1026 # and versions 1.0.x of EGCS.
1027 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1028 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1029 libc_cv_c_asmcr0_bug='no',
1030 libc_cv_c_asmcr0_bug='yes')])
1031 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1032 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1036 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1037 [cat > conftest.c <<EOF
1038 #line __oline__ "configure"
1039 static char __EH_FRAME_BEGIN__[];
1042 #ifdef CHECK__register_frame
1043 __register_frame (__EH_FRAME_BEGIN__);
1044 __deregister_frame (__EH_FRAME_BEGIN__);
1046 #ifdef CHECK__register_frame_info
1047 __register_frame_info (__EH_FRAME_BEGIN__);
1048 __deregister_frame_info (__EH_FRAME_BEGIN__);
1053 /* FIXME: this is fragile. */
1063 dnl No \ in command here because it ends up inside ''.
1064 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1065 -nostdlib -nostartfiles
1066 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1067 libc_cv_gcc_dwarf2_unwind_info=static
1069 libc_cv_gcc_dwarf2_unwind_info=no
1071 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1072 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1073 -nostdlib -nostartfiles
1074 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1075 libc_cv_gcc_dwarf2_unwind_info=yes
1077 libc_cv_gcc_dwarf2_unwind_info=no
1081 case $libc_cv_gcc_dwarf2_unwind_info in
1083 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1086 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1087 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1091 dnl Check whether compiler understands __builtin_expect.
1092 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1093 [cat > conftest.c <<EOF
1094 #line __oline__ "configure"
1097 a = __builtin_expect (a, 10);
1098 return a == 10 ? 0 : 1;
1101 dnl No \ in command here because it ends up inside ''.
1102 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1103 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1104 libc_cv_gcc_builtin_expect=yes
1106 libc_cv_gcc_builtin_expect=no
1109 if test "$libc_cv_gcc_builtin_expect" = yes; then
1110 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1113 dnl Check whether the compiler supports subtraction of local labels.
1114 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1115 [cat > conftest.c <<EOF
1117 #line __oline__ "configure"
1120 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1121 void *p = &&l1 + ar[a];
1130 dnl No \ in command here because it ends up inside ''.
1131 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1132 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1133 libc_cv_gcc_subtract_local_labels=yes
1135 libc_cv_gcc_subtract_local_labels=no
1138 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1139 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1142 dnl Check whether we have the gd library available.
1143 AC_MSG_CHECKING(for libgd)
1144 old_CFLAGS="$CFLAGS"
1145 CFLAGS="$CFLAGS $libgd_include"
1146 old_LDFLAGS="$LDFLAGS"
1147 LDFLAGS="$LDFLAGS $libgd_ldflags"
1149 LIBS="$LIBS -lgd -lpng -lz"
1150 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1151 CFLAGS="$old_CFLAGS"
1152 LDFLAGS="$old_LDFLAGS"
1154 AC_MSG_RESULT($LIBGD)
1157 ### End of automated tests.
1158 ### Now run sysdeps configure fragments.
1160 # sysdeps configure fragments may set these with files to be linked below.
1164 # They also can set these variables.
1165 ldd_rewrite_script=no
1167 # Iterate over all the sysdep directories we will use, running their
1168 # configure fragments, and looking for a uname implementation.
1170 for dir in $sysnames; do
1173 *) dest=$srcdir/$dir ;;
1175 if test -r $dest/configure; then
1176 AC_MSG_RESULT(running configure fragment for $dest)
1180 if test -z "$uname"; then
1181 if test -r $dest/uname.c ||
1182 test -r $dest/uname.S ||
1183 { test -r $dest/syscalls.list &&
1184 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1191 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1193 # If we will use the generic uname implementation, we must figure out what
1194 # it will say by examining the system, and write the results in config-name.h.
1195 if test "$uname" = "sysdeps/generic"; then
1198 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1200 if test $uname_sysname != $config_os; then
1201 config_release=`echo $config_os | sed s/$uname_sysname//`
1204 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1205 if test -r /vmunix; then
1206 kernel_id=`strings /vmunix | grep UNIX`
1207 elif test -r /dynix; then
1208 kernel_id=`strings /dynix | grep DYNIX`
1214 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1215 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1217 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1219 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1220 != x$config_release; then
1221 # The configuration release is a substring of the kernel release.
1222 libc_cv_uname_release=$kernel_release
1223 elif test x$config_release != x; then
1224 libc_cv_uname_release=$config_release
1225 elif test x$kernel_release != x; then
1226 libc_cv_uname_release=$kernel_release
1228 libc_cv_uname_release=unknown
1230 uname_release="$libc_cv_uname_release"
1232 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1233 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1235 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1237 if test -n "$kernel_version"; then
1238 libc_cv_uname_version="$kernel_version"
1240 libc_cv_uname_version=unknown
1242 uname_version="$libc_cv_uname_version"
1244 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1245 config_uname=config-name.h:config-name.in
1247 # For non-generic uname, we don't need to create config-name.h at all.
1251 AC_MSG_CHECKING(stdio selection)
1254 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1255 default) stdio=stdio ;;
1257 AC_MSG_RESULT($stdio)
1259 # Test for old glibc 2.0.x headers so that they can be removed properly
1260 # Search only in includedir.
1261 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1262 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1264 old_glibc_headers=yes
1266 old_glibc_headers=no
1268 AC_MSG_RESULT($old_glibc_headers)
1269 if test ${old_glibc_headers} = yes; then
1270 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1271 AC_MSG_WARN(*** be removed.)
1273 AC_SUBST(old_glibc_headers)
1275 AC_SUBST(libc_cv_slibdir)
1276 AC_SUBST(libc_cv_sysconfdir)
1277 AC_SUBST(libc_cv_rootsbindir)
1279 AC_SUBST(has_ldconfig)
1280 AC_SUBST(ldd_rewrite_script)
1282 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1283 if test $gnu_ld = yes; then
1284 AC_DEFINE(HAVE_GNU_LD)
1286 if test $gnu_as = yes; then
1287 AC_DEFINE(HAVE_GNU_AS)
1289 if test $elf = yes; then
1295 if test $shared = default; then
1296 if test $gnu_ld = yes; then
1299 # For now we do not assume shared libs are available. In future more
1300 # tests might become available.
1305 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1307 cat > conftest.c <<EOF
1308 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1309 # error PIC is default.
1312 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1316 AC_SUBST(pic_default)
1321 AC_SUBST(static_nss)
1322 AC_SUBST(nopic_initfini)
1327 *door*) linux_doors=yes ;;
1328 *) linux_doors=no ;;
1330 AC_SUBST(linux_doors)
1332 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1335 config_makefile=Makefile
1338 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1339 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1343 echo '*** Do NOT install this release on any production system!'
1344 echo '*** It is known to be broken and will be so for quite some time.'
1345 echo '*** Use the latest released version instead.'
1347 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1348 case $CONFIG_FILES in *config.make*)
1349 echo "$config_vars" >> config.make;;
1351 test -d bits || mkdir bits], [config_vars='$config_vars'])