1 Dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.11)dnl dnl Minimum Autoconf version required.
4 AC_INIT(include/features.h)
5 AC_CONFIG_HEADER(config.h)
7 # This will get text that should go into config.make.
10 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
12 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
15 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
17 *) config_vars="$config_vars
18 gmp-srcdir = $withval" ;;
21 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
22 AC_ARG_WITH(gettext, dnl
23 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
25 case "$with_gettext" in
27 AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
30 config_vars="$config_vars
31 gettext-srcdir = $withval" ;;
35 dnl Arguments to specify presence of other packages/features.
37 [ --with-fp if using floating-point hardware [default=yes]],
38 with_fp=$withval, with_fp=yes)
39 AC_ARG_WITH(binutils, dnl
40 --with-binutils=PATH specify location of binutils (as and ld),
41 path_binutils=$withval, path_binutils='')
43 --with-elf if using the ELF object format,
46 AC_ARG_ENABLE(libio, dnl
47 [ --enable-libio build in GNU libio instead of GNU stdio],
48 [if test $enableval = yes; then
55 AC_ARG_ENABLE(sanity-checks, dnl
56 [ --disable-sanity-checks really do not use threads (should not be used
57 except in special situations) [default=yes]],
58 enable_sanity=$enableval, enable_sanity=yes)
60 dnl Arguments to enable or disable building the static, shared, profiled,
61 dnl and -fomit-frame-pointer libraries.
62 AC_ARG_ENABLE(static, dnl
63 [ --enable-static build static library [default=yes]],
64 static=$enableval, static=yes)
65 AC_ARG_ENABLE(shared, dnl
66 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
67 shared=$enableval, shared=default)
68 AC_ARG_ENABLE(profile, dnl
69 [ --enable-profile build profiled library [default=yes]],
70 profile=$enableval, profile=yes)
71 AC_ARG_ENABLE(omitfp, dnl
72 [ --enable-omitfp build undebuggable optimized library [default=no]],
73 omitfp=$enableval, omitfp=no)
74 AC_ARG_ENABLE(bounded, dnl
75 [ --enable-bounded build with runtime bounds checking [default=no]],
76 bounded=$enableval, bounded=no)
77 AC_ARG_ENABLE(versioning, dnl
78 [ --disable-versioning do not include versioning information in the
79 library objects [default=yes if supported]],
80 enable_versioning=$enableval, enable_versioning=yes)
82 dnl Generic infrastructure for drop-in additions to libc.
83 AC_ARG_ENABLE(add-ons, dnl
84 [ --enable-add-ons=DIR... configure and build named extra directories],
85 [add_ons=`echo "$enableval" | sed 's/,/ /g'`],
87 AC_CONFIG_SUBDIRS($add_ons)
89 if test x"$add_ons" != x; then
91 add_ons_pfx="$add_ons_pfx $f/"
95 dnl On some platforms we cannot use dynamic loading. We must provide
96 dnl static NSS modules.
97 AC_ARG_ENABLE(static-nss, dnl
98 [ --enable-static-nss build static NSS modules [default=no]],
99 static_nss=$enableval, static_nss=no)
100 if test x"$static_nss" = xyes; then
101 AC_DEFINE(DO_STATIC_NSS)
106 # The way shlib-versions is used to generate soversions.mk uses a
107 # fairly simplistic model for name recognition that can't distinguish
108 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
109 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
110 # tell. This doesn't get used much beyond that, so it's fairly safe.
115 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
120 ### I put this here to prevent those annoying emails from people who cannot
121 ### read and try to compile glibc on unsupported platforms. --drepper
123 ### By using the undocumented --enable-hacker-mode option for configure
124 ### one can skip this test to make the configuration not fail for unsupported
127 if test -z "$enable_hacker_mode"; then
132 echo "*** The GNU C library is currently not available for this platform."
133 echo "*** So far nobody cared to port it and if there is no volunteer it"
134 echo "*** might never happen. So, if you have interest to see glibc on"
135 echo "*** this platform visit"
136 echo "*** http://www.gnu.ai.mit.edu/software/libc/porting.html"
137 echo "*** and join the group of porters"
143 # We keep the original values in `$config_*' and never modify them, so we
144 # can write them unchanged into config.make. Everything else uses
145 # $machine, $vendor, and $os, and changes them whenever convenient.
146 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
148 # Some configurations imply other options.
150 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
151 # These systems always use GNU tools.
152 gnu_ld=yes gnu_as=yes ;;
155 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
156 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
158 gnu* | linux* | sysv4* | solaris2*)
159 # These systems (almost) always use the ELF format.
164 machine=$config_machine
165 vendor=$config_vendor
168 dnl We need to use [ and ] for other purposes for a while now.
170 # Expand the configuration machine name into a subdirectory by architecture
171 # type and particular chip.
173 a29k | am29000) base_machine=a29k machine=a29k ;;
174 alpha*) base_machine=alpha machine=alpha/$machine ;;
175 arm*) base_machine=arm machine=arm/$machine ;;
176 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
177 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
178 hppa*) base_machine=hppa machine=hppa/$machine ;;
179 i[3456]86) base_machine=i386 machine=i386/$machine ;;
180 m680?0) base_machine=m68k machine=m68k/$machine ;;
181 m68k) base_machine=m68k machine=m68k/m68020 ;;
182 m88???) base_machine=m88k machine=m88k/$machine ;;
183 m88k) base_machine=m88k machine=m88k/m88100 ;;
184 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
185 mips*) base_machine=mips machine=mips/$machine ;;
187 base_machine=sparc machine=sparc/sparc32 ;;
188 sparcv8 | supersparc | hypersparc)
189 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
190 sparc64 | ultrasparc)
191 base_machine=sparc machine=sparc/sparc64 ;;
194 AC_SUBST(base_machine)
196 if test "$base_machine" = "i386"; then
197 AC_DEFINE(USE_REGPARMS)
200 # Compute the list of sysdep directories for this configuration.
201 # This can take a while to compute.
202 sysdep_dir=$srcdir/sysdeps
203 AC_MSG_CHECKING(sysdep dirs)
204 dnl We need to use [ and ] for other purposes for a while now.
206 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
207 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
212 netbsd* | 386bsd* | freebsd* | bsdi*)
213 base_os=unix/bsd/bsd4.4 ;;
214 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
216 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
219 base_os=unix/sysv/sysv4 ;;
221 base_os=standalone ;;
226 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
229 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
233 o=`echo $tail | sed 's/[0-9]*$//'`
234 if test $o != $tail; then
237 # For linux-gnu, try linux-gnu, then linux.
238 o=`echo $tail | sed 's/-.*$//'`
239 if test $o != $tail; then
243 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
246 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
252 # For sparc/sparc9, try sparc/sparc9 and then sparc.
255 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
257 # Prepend the machine's FPU directory unless --without-fp.
258 if test "$with_fp" = yes; then
265 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
268 # Find what sysdep directories exist.
270 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
271 for d in $add_ons_pfx ''; do
272 for b in $base ''; do
273 for m0 in $mach ''; do
274 for v in /$vendor ''; do
275 for o in /$ostry ''; do
276 for m in $mach ''; do
277 if test "$m0$b$v$o$m"; then
278 try="${d}sysdeps$m0$b$v$o$m"
279 test -n "$enable_debug_configure" &&
280 echo "$0 [DEBUG]: try $try" >&2
283 *) dest=$srcdir/$try ;;
285 if test -d $dest; then
286 sysnames="$sysnames $try"
287 { test -n "$o" || test -n "$b"; } && os_used=t
288 { test -n "$m" || test -n "$m0"; } && machine_used=t
299 if test -z "$os_used" && test "$os" != none; then
300 AC_MSG_ERROR(Operating system $os is not supported.)
302 if test -z "$machine_used" && test "$machine" != none; then
303 AC_MSG_ERROR(The $machine is not supported.)
306 # We have now validated the configuration.
309 # If using ELF, look for an `elf' subdirectory of each machine directory.
310 # We prepend these rather than inserting them whereever the machine appears
311 # because things specified by the machine's ELF ABI should override
312 # OS-specific things, and should always be the same for any OS on the
313 # machine (otherwise what's the point of an ABI?).
314 if test "$elf" = yes; then
316 for d in $add_ons_pfx ''; do
319 *) xsrcdir=$srcdir/ ;;
322 if test -d $xsrcdir${d}sysdeps$m/elf; then
323 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
327 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
331 # Expand the list of system names into a full list of directories
332 # from each element's parent name and Implies file (if present).
335 while test $# -gt 0; do
339 case " $names " in *" $name "*)
340 # Already in the list.
344 # Report each name as we discover it, so there is no long pause in output.
345 echo $ac_n "$name $ac_c" >&AC_FD_MSG
347 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
351 *) xsrcdir=$srcdir/ ;;
353 test -n "$enable_debug_configure" &&
354 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
356 if test -f $xsrcdir$name/Implies; then
357 # Collect more names from the `Implies' file (removing comments).
358 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
360 for x in $implied_candidate; do
361 if test -d $xsrcdir$name_base/$x; then
362 implied="$implied $name_base/$x";
364 AC_MSG_WARN($name/Implies specifies nonexistent $x)
371 # Add NAME to the list of names.
374 # Find the parent of NAME, using the empty string if it has none.
376 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
379 # Add the names implied by NAME, and NAME's parent (if it has one), to
380 # the list of names to be processed (the argument list). We prepend the
381 # implied names to the list and append the parent. We want implied
382 # directories to come before further directories inferred from the
383 # configuration components; this ensures that for sysv4, unix/common
384 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
386 sysnames="`echo $implied $* $parent`"
387 test -n "$sysnames" && set $sysnames
390 # Add the default directories.
391 sysnames="$names sysdeps/generic sysdeps/stub"
393 # The other names were emitted during the scan.
394 AC_MSG_RESULT(sysdeps/generic sysdeps/stub)
400 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
401 # The makefiles need to use a different form to find it in $srcdir.
402 INSTALL='\$(..)./install-sh -c'
405 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
409 if test $host != $build; then
410 AC_CHECK_PROGS(BUILD_CC, gcc cc)
412 AC_SUBST(cross_compiling)
415 AC_CHECK_TOOL(AR, ar)
416 AC_CHECK_TOOL(RANLIB, ranlib, :)
418 AC_PATH_PROG(BASH, bash, no)
419 if test "$BASH" != no &&
420 $BASH -c 'test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
421 libc_cv_have_bash2=yes
423 libc_cv_have_bash2=no
425 AC_SUBST(libc_cv_have_bash2)
427 dnl We need a ksh compatible shell for tzselect.
428 if test "$BASH" = no; then
429 AC_PATH_PROG(KSH, ksh, no)
430 if test "$KSH" = no; then
440 AC_SUBST(libc_cv_have_ksh)
442 AC_PATH_PROGS(PERL, perl, no)
445 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
446 echo '#include <stddef.h>
447 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
448 if eval "$ac_cpp conftest.c 2>/dev/null" \
449 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
450 libc_cv_signed_size_t=no
452 libc_cv_signed_size_t=yes
455 if test $libc_cv_signed_size_t = yes; then
456 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
457 cat >> confdefs.h <<\EOF
459 #define __SIZE_TYPE__ unsigned
463 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
465 [#define __need_size_t
466 #define __need_wchar_t
469 #include <stddef.h>], [size_t size; wchar_t wchar;
471 #error stddef.h ignored __need_*
473 if (&size == NULL || &wchar == NULL) abort ();],
474 libc_cv_friendly_stddef=yes,
475 libc_cv_friendly_stddef=no)])
476 if test $libc_cv_friendly_stddef = yes; then
477 config_vars="$config_vars
478 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
481 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
482 libc_cv_need_minus_P, [dnl
483 cat > conftest.S <<EOF
484 #include "confdefs.h"
485 /* Nothing whatsoever. */
487 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
488 libc_cv_need_minus_P=no
490 libc_cv_need_minus_P=yes
493 if test $libc_cv_need_minus_P = yes; then
494 config_vars="$config_vars
495 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
498 AC_CACHE_CHECK(for assembler global-symbol directive,
499 libc_cv_asm_global_directive, [dnl
500 libc_cv_asm_global_directive=UNKNOWN
501 for ac_globl in .globl .global; do
502 cat > conftest.s <<EOF
507 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
508 libc_cv_asm_global_directive=${ac_globl}
511 test $libc_cv_asm_global_directive != UNKNOWN && break
513 if test $libc_cv_asm_global_directive = UNKNOWN; then
514 AC_MSG_ERROR(cannot determine asm global directive)
516 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
519 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
520 cat > conftest.s <<EOF
523 .set glibc_conftest_frobozz,foo
524 $libc_cv_asm_global_directive glibc_conftest_frobozz
526 # The alpha-dec-osf1 assembler gives only a warning for `.set'
527 # (but it doesn't work), so we must do a linking check to be sure.
528 cat > conftest1.c <<\EOF
529 extern int glibc_conftest_frobozz;
530 main () { printf ("%d\n", glibc_conftest_frobozz); }
532 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
533 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
534 libc_cv_asm_set_directive=yes
536 libc_cv_asm_set_directive=no
539 if test $libc_cv_asm_set_directive = yes; then
540 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
543 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
544 [cat > conftest.s <<EOF
547 .symver _sym,sym@VERS
549 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
550 libc_cv_asm_symver_directive=yes
552 libc_cv_asm_symver_directive=no
555 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
556 if test $libc_cv_asm_symver_directive = yes; then
557 cat > conftest.s <<EOF
560 .symver _sym,sym@VERS
562 cat > conftest.map <<EOF
567 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
568 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
569 -nostartfiles -nostdlib
570 -Wl,--version-script,conftest.map
573 libc_cv_ld_version_script_option=yes
575 libc_cv_ld_version_script_option=no
578 libc_cv_ld_version_script_option=no
581 libc_cv_ld_version_script_option=no
584 if test $libc_cv_asm_symver_directive = yes &&
585 test $libc_cv_ld_version_script_option = yes &&
586 test $enable_versioning = yes; then
588 AC_DEFINE(DO_VERSIONING)
594 if test $elf = yes; then
595 AC_CACHE_CHECK(for .previous assembler directive,
596 libc_cv_asm_previous_directive, [dnl
597 cat > conftest.s <<EOF
601 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
602 libc_cv_asm_previous_directive=yes
604 libc_cv_asm_previous_directive=no
607 if test $libc_cv_asm_previous_directive = yes; then
608 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
610 AC_CACHE_CHECK(for .popsection assembler directive,
611 libc_cv_asm_popsection_directive, [dnl
612 cat > conftest.s <<EOF
613 .pushsection foo_section
616 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
617 libc_cv_asm_popsection_directive=yes
619 libc_cv_asm_popsection_directive=no
622 if test $libc_cv_asm_popsection_directive = yes; then
623 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
628 if test $elf != yes; then
629 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
630 [AC_TRY_COMPILE(, [asm (".section .init");
631 asm (".section .fini");
633 libc_cv_have_initfini=yes,
634 libc_cv_have_initfini=no)])
635 AC_SUBST(libc_cv_have_initfini)dnl
636 if test $libc_cv_have_initfini = yes; then
637 AC_DEFINE(HAVE_INITFINI)
641 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
642 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
643 [cat > conftest.$ac_ext <<EOF
644 dnl This sometimes fails to find confdefs.h, for some reason.
645 dnl [#]line __oline__ "[$]0"
646 [#]line __oline__ "configure"
647 #include "confdefs.h"
648 void underscore_test(void) {
651 if AC_TRY_EVAL(ac_compile); then
652 if grep _underscore_test conftest* >/dev/null; then
653 ifelse([$1], , :, [rm -f conftest*
656 ifelse([$2], , , [rm -f conftest*
660 echo "configure: failed program was:" >&AC_FD_CC
661 cat conftest.$ac_ext >&AC_FD_CC
662 ifelse([$2], , , [rm -f conftest*
667 if test $elf = yes; then
668 libc_cv_asm_underscores=no
670 if test $ac_cv_prog_cc_works = yes; then
671 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
672 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
673 libc_cv_asm_underscores=yes,
674 libc_cv_asm_underscores=no)])
676 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
677 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
678 libc_cv_asm_underscores=no)])
681 if test $libc_cv_asm_underscores = no; then
682 AC_DEFINE(NO_UNDERSCORES)
685 if test $elf = yes; then
686 libc_cv_weak_symbols=yes
687 libc_cv_asm_weak_directive=yes
688 libc_cv_asm_weakext_directive=no
690 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
692 cat > conftest.s <<EOF
694 ${libc_cv_asm_global_directive} foo
699 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
700 libc_cv_asm_weak_directive=yes
702 libc_cv_asm_weak_directive=no
706 if test $libc_cv_asm_weak_directive = no; then
707 AC_CACHE_CHECK(for assembler .weakext directive,
708 libc_cv_asm_weakext_directive,
710 cat > conftest.s <<EOF
712 ${libc_cv_asm_global_directive} foo
717 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
718 libc_cv_asm_weakext_directive=yes
720 libc_cv_asm_weakext_directive=no
727 if test $libc_cv_asm_weak_directive = yes; then
728 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
729 elif test $libc_cv_asm_weakext_directive = yes; then
730 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
733 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
734 cat > conftest.c <<\EOF
739 dnl No \ in command here because it ends up inside ''.
740 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
741 -nostdlib -nostartfiles -Wl,--no-whole-archive
742 -o conftest conftest.c 1>&AC_FD_CC]); then
743 libc_cv_ld_no_whole_archive=yes
745 libc_cv_ld_no_whole_archive=no
748 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
750 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
751 cat > conftest.c <<\EOF
756 dnl No \ in command here because it ends up inside ''.
757 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
758 -nostdlib -nostartfiles -fno-exceptions
759 -o conftest conftest.c 1>&AC_FD_CC]); then
760 libc_cv_gcc_no_exceptions=yes
762 libc_cv_gcc_no_exceptions=no
765 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
767 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
768 [cat > conftest.c <<EOF
769 #line __oline__ "configure"
770 static char __EH_FRAME_BEGIN__[];
773 __register_frame (__EH_FRAME_BEGIN__);
774 __deregister_frame (__EH_FRAME_BEGIN__);
778 /* FIXME: this is fragile. */
788 dnl No \ in command here because it ends up inside ''.
789 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
790 -nostdlib -nostartfiles
791 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
792 libc_cv_gcc_dwarf2_unwind_info=yes
794 libc_cv_gcc_dwarf2_unwind_info=no
797 if test $libc_cv_gcc_dwarf2_unwind_info = yes; then
798 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
801 ### End of automated tests.
802 ### Now run sysdeps configure fragments.
804 # sysdeps configure fragments may set these with files to be linked below.
808 # Iterate over all the sysdep directories we will use, running their
809 # configure fragments, and looking for a uname implementation.
811 for dir in $sysnames; do
814 *) dest=$srcdir/$dir ;;
816 if test -r $dest/configure; then
817 AC_MSG_RESULT(running configure fragment for $dest)
821 if test -z "$uname"; then
822 if test -r $dest/uname.c ||
823 test -r $dest/uname.S ||
824 { test -r $dest/syscalls.list &&
825 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
832 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
834 # If we will use the generic uname implementation, we must figure out what
835 # it will say by examining the system, and write the results in config-name.h.
836 if test "$uname" = "sysdeps/generic"; then
839 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
841 if test $uname_sysname != $config_os; then
842 config_release=`echo $config_os | sed s/$uname_sysname//`
845 AC_DEFUN(LIBC_KERNEL_ID, [dnl
846 if test -r /vmunix; then
847 kernel_id=`strings /vmunix | grep UNIX`
848 elif test -r /dynix; then
849 kernel_id=`strings /dynix | grep DYNIX`
855 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
856 AC_REQUIRE([LIBC_KERNEL_ID])dnl
858 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
860 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
861 != x$config_release; then
862 # The configuration release is a substring of the kernel release.
863 libc_cv_uname_release=$kernel_release
864 elif test x$config_release != x; then
865 libc_cv_uname_release=$config_release
866 elif test x$kernel_release != x; then
867 libc_cv_uname_release=$kernel_release
869 libc_cv_uname_release=unknown
871 uname_release="$libc_cv_uname_release"
873 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
874 AC_REQUIRE([LIBC_KERNEL_ID])dnl
876 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
878 if test -n "$kernel_version"; then
879 libc_cv_uname_version="$kernel_version"
881 libc_cv_uname_version=unknown
883 uname_version="$libc_cv_uname_version"
885 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
886 config_uname=config-name.h:config-name.in
888 # For non-generic uname, we don't need to create config-name.h at all.
892 AC_MSG_CHECKING(stdio selection)
895 libio) AC_DEFINE(USE_IN_LIBIO) ;;
896 default) stdio=stdio ;;
898 AC_MSG_RESULT($stdio)
900 AC_MSG_CHECKING(ldap selection)
911 AC_SUBST(libc_cv_slibdir)
912 AC_SUBST(libc_cv_sysconfdir)
913 AC_SUBST(libc_cv_rootsbindir)
915 AC_SUBST(has_ldconfig)
917 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
918 if test $gnu_ld = yes; then
919 AC_DEFINE(HAVE_GNU_LD)
921 if test $gnu_as = yes; then
922 AC_DEFINE(HAVE_GNU_AS)
924 if test $elf = yes; then
930 if test $shared = default; then
931 if test $gnu_ld = yes; then
934 # For now we do not assume shared libs are available. In future more
935 # tests might become available.
943 AC_SUBST(nopic_initfini)
947 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
950 config_makefile=Makefile
953 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
956 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
957 [echo '$config_vars' >> config.make; test -d bits || mkdir bits])