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 # Test whether such a subdir really exists.
92 if test -d $srcdir/$f; then
93 add_ons_pfx="$add_ons_pfx $f/"
95 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
100 dnl On some platforms we cannot use dynamic loading. We must provide
101 dnl static NSS modules.
102 AC_ARG_ENABLE(static-nss, dnl
103 [ --enable-static-nss build static NSS modules [default=no]],
104 static_nss=$enableval, static_nss=no)
105 if test x"$static_nss" = xyes; then
106 AC_DEFINE(DO_STATIC_NSS)
111 # The way shlib-versions is used to generate soversions.mk uses a
112 # fairly simplistic model for name recognition that can't distinguish
113 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
114 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
115 # tell. This doesn't get used much beyond that, so it's fairly safe.
120 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
125 ### I put this here to prevent those annoying emails from people who cannot
126 ### read and try to compile glibc on unsupported platforms. --drepper
128 ### By using the undocumented --enable-hacker-mode option for configure
129 ### one can skip this test to make the configuration not fail for unsupported
132 if test -z "$enable_hacker_mode"; then
137 echo "*** The GNU C library is currently not available for this platform."
138 echo "*** So far nobody cared to port it and if there is no volunteer it"
139 echo "*** might never happen. So, if you have interest to see glibc on"
140 echo "*** this platform visit"
141 echo "*** http://www.gnu.ai.mit.edu/software/libc/porting.html"
142 echo "*** and join the group of porters"
148 # We keep the original values in `$config_*' and never modify them, so we
149 # can write them unchanged into config.make. Everything else uses
150 # $machine, $vendor, and $os, and changes them whenever convenient.
151 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
153 # Some configurations imply other options.
155 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
156 # These systems always use GNU tools.
157 gnu_ld=yes gnu_as=yes ;;
160 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
161 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
163 gnu* | linux* | sysv4* | solaris2*)
164 # These systems (almost) always use the ELF format.
169 machine=$config_machine
170 vendor=$config_vendor
173 dnl We need to use [ and ] for other purposes for a while now.
175 # Expand the configuration machine name into a subdirectory by architecture
176 # type and particular chip.
178 a29k | am29000) base_machine=a29k machine=a29k ;;
179 alpha*) base_machine=alpha machine=alpha/$machine ;;
180 arm*) base_machine=arm machine=arm/$machine ;;
181 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
182 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
183 hppa*) base_machine=hppa machine=hppa/$machine ;;
184 i[3456]86) base_machine=i386 machine=i386/$machine ;;
185 m680?0) base_machine=m68k machine=m68k/$machine ;;
186 m68k) base_machine=m68k machine=m68k/m68020 ;;
187 m88???) base_machine=m88k machine=m88k/$machine ;;
188 m88k) base_machine=m88k machine=m88k/m88100 ;;
189 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
190 mips*) base_machine=mips machine=mips/$machine ;;
192 base_machine=sparc machine=sparc/sparc32 ;;
193 sparcv8 | supersparc | hypersparc)
194 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
195 sparc64 | ultrasparc)
196 base_machine=sparc machine=sparc/sparc64 ;;
199 AC_SUBST(base_machine)
201 if test "$base_machine" = "i386"; then
202 AC_DEFINE(USE_REGPARMS)
205 # Compute the list of sysdep directories for this configuration.
206 # This can take a while to compute.
207 sysdep_dir=$srcdir/sysdeps
208 AC_MSG_CHECKING(sysdep dirs)
209 dnl We need to use [ and ] for other purposes for a while now.
211 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
212 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
217 netbsd* | 386bsd* | freebsd* | bsdi*)
218 base_os=unix/bsd/bsd4.4 ;;
219 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
221 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
224 base_os=unix/sysv/sysv4 ;;
226 base_os=standalone ;;
231 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
234 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
238 o=`echo $tail | sed 's/[0-9]*$//'`
239 if test $o != $tail; then
242 # For linux-gnu, try linux-gnu, then linux.
243 o=`echo $tail | sed 's/-.*$//'`
244 if test $o != $tail; then
248 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
251 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
257 # For sparc/sparc9, try sparc/sparc9 and then sparc.
260 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
262 # Prepend the machine's FPU directory unless --without-fp.
263 if test "$with_fp" = yes; then
270 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
273 # Find what sysdep directories exist.
275 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
276 for d in $add_ons_pfx ''; do
277 for b in $base ''; do
278 for m0 in $mach ''; do
279 for v in /$vendor ''; do
280 for o in /$ostry ''; do
281 for m in $mach ''; do
282 if test "$m0$b$v$o$m"; then
283 try="${d}sysdeps$m0$b$v$o$m"
284 test -n "$enable_debug_configure" &&
285 echo "$0 [DEBUG]: try $try" >&2
288 *) dest=$srcdir/$try ;;
290 if test -d $dest; then
291 sysnames="$sysnames $try"
292 { test -n "$o" || test -n "$b"; } && os_used=t
293 { test -n "$m" || test -n "$m0"; } && machine_used=t
304 if test -z "$os_used" && test "$os" != none; then
305 AC_MSG_ERROR(Operating system $os is not supported.)
307 if test -z "$machine_used" && test "$machine" != none; then
308 AC_MSG_ERROR(The $machine is not supported.)
311 # We have now validated the configuration.
314 # If using ELF, look for an `elf' subdirectory of each machine directory.
315 # We prepend these rather than inserting them whereever the machine appears
316 # because things specified by the machine's ELF ABI should override
317 # OS-specific things, and should always be the same for any OS on the
318 # machine (otherwise what's the point of an ABI?).
319 if test "$elf" = yes; then
321 for d in $add_ons_pfx ''; do
324 *) xsrcdir=$srcdir/ ;;
327 if test -d $xsrcdir${d}sysdeps$m/elf; then
328 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
332 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
336 # Expand the list of system names into a full list of directories
337 # from each element's parent name and Implies file (if present).
340 while test $# -gt 0; do
344 case " $names " in *" $name "*)
345 # Already in the list.
349 # Report each name as we discover it, so there is no long pause in output.
350 echo $ac_n "$name $ac_c" >&AC_FD_MSG
352 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
356 *) xsrcdir=$srcdir/ ;;
358 test -n "$enable_debug_configure" &&
359 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
361 if test -f $xsrcdir$name/Implies; then
362 # Collect more names from the `Implies' file (removing comments).
363 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
365 for x in $implied_candidate; do
366 if test -d $xsrcdir$name_base/$x; then
367 implied="$implied $name_base/$x";
369 AC_MSG_WARN($name/Implies specifies nonexistent $x)
376 # Add NAME to the list of names.
379 # Find the parent of NAME, using the empty string if it has none.
381 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
384 # Add the names implied by NAME, and NAME's parent (if it has one), to
385 # the list of names to be processed (the argument list). We prepend the
386 # implied names to the list and append the parent. We want implied
387 # directories to come before further directories inferred from the
388 # configuration components; this ensures that for sysv4, unix/common
389 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
391 sysnames="`echo $implied $* $parent`"
392 test -n "$sysnames" && set $sysnames
395 # Add the default directories.
396 sysnames="$names sysdeps/generic"
398 # The other names were emitted during the scan.
399 AC_MSG_RESULT(sysdeps/generic)
405 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
406 # The makefiles need to use a different form to find it in $srcdir.
407 INSTALL='\$(..)./install-sh -c'
410 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
414 if test $host != $build; then
415 AC_CHECK_PROGS(BUILD_CC, gcc cc)
417 AC_SUBST(cross_compiling)
420 AC_CHECK_TOOL(AR, ar)
421 AC_CHECK_TOOL(RANLIB, ranlib, :)
423 AC_PATH_PROG(BASH, bash, no)
424 if test "$BASH" != no &&
425 $BASH -c 'test "$BASH_VERSINFO"
426 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
427 libc_cv_have_bash2=yes
429 libc_cv_have_bash2=no
431 AC_SUBST(libc_cv_have_bash2)
433 dnl We need a ksh compatible shell for tzselect.
434 if test "$BASH" = no; then
435 AC_PATH_PROG(KSH, ksh, no)
436 if test "$KSH" = no; then
446 AC_SUBST(libc_cv_have_ksh)
448 AC_PATH_PROGS(PERL, perl, no)
451 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
452 echo '#include <stddef.h>
453 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
454 if eval "$ac_cpp conftest.c 2>/dev/null" \
455 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
456 libc_cv_signed_size_t=no
458 libc_cv_signed_size_t=yes
461 if test $libc_cv_signed_size_t = yes; then
462 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
463 cat >> confdefs.h <<\EOF
465 #define __SIZE_TYPE__ unsigned
469 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
471 [#define __need_size_t
472 #define __need_wchar_t
475 #include <stddef.h>], [size_t size; wchar_t wchar;
477 #error stddef.h ignored __need_*
479 if (&size == NULL || &wchar == NULL) abort ();],
480 libc_cv_friendly_stddef=yes,
481 libc_cv_friendly_stddef=no)])
482 if test $libc_cv_friendly_stddef = yes; then
483 config_vars="$config_vars
484 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
487 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
488 libc_cv_need_minus_P, [dnl
489 cat > conftest.S <<EOF
490 #include "confdefs.h"
491 /* Nothing whatsoever. */
493 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
494 libc_cv_need_minus_P=no
496 libc_cv_need_minus_P=yes
499 if test $libc_cv_need_minus_P = yes; then
500 config_vars="$config_vars
501 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
504 # gcc 2.7.x has a bug where if -pipe is set, the assembler will always
505 # be told to read stdin. This causes the compiler to hang when fed an
507 if test $ac_cv_prog_gcc = yes; then
508 case `${CC-cc} -v 2>&1` in
510 # We must check this even if -pipe is not given here, because the user
511 # might do `make CFLAGS=-pipe'.
512 AC_CACHE_CHECK(for gcc 2.7.x -pipe bug, libc_cv_gcc_pipe_bug, [dnl
513 cp /dev/null conftest.s
514 cat >conftest1.s <<EOF
517 if ${CC-cc} -pipe -c conftest.s <conftest1.s 2>/dev/null; then
518 libc_cv_gcc_pipe_bug=no
520 libc_cv_gcc_pipe_bug=yes
523 if test $libc_cv_gcc_pipe_bug = yes; then
524 makeCC="${CC-cc} -B\$(common-objpfx)"
526 CFLAGS=`echo $CFLAGS |sed 's/-pipe//'`
528 *) libc_cv_gcc_pipe_bug=no;;
531 libc_cv_gcc_pipe_bug=no
534 AC_CACHE_CHECK(for assembler global-symbol directive,
535 libc_cv_asm_global_directive, [dnl
536 libc_cv_asm_global_directive=UNKNOWN
537 for ac_globl in .globl .global; do
538 cat > conftest.s <<EOF
543 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
544 libc_cv_asm_global_directive=${ac_globl}
547 test $libc_cv_asm_global_directive != UNKNOWN && break
549 if test $libc_cv_asm_global_directive = UNKNOWN; then
550 AC_MSG_ERROR(cannot determine asm global directive)
552 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
555 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
556 cat > conftest.s <<EOF
559 .set glibc_conftest_frobozz,foo
560 $libc_cv_asm_global_directive glibc_conftest_frobozz
562 # The alpha-dec-osf1 assembler gives only a warning for `.set'
563 # (but it doesn't work), so we must do a linking check to be sure.
564 cat > conftest1.c <<\EOF
565 extern int glibc_conftest_frobozz;
566 main () { printf ("%d\n", glibc_conftest_frobozz); }
568 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
569 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
570 libc_cv_asm_set_directive=yes
572 libc_cv_asm_set_directive=no
575 if test $libc_cv_asm_set_directive = yes; then
576 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
579 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
580 [cat > conftest.s <<EOF
583 .symver _sym,sym@VERS
585 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
586 libc_cv_asm_symver_directive=yes
588 libc_cv_asm_symver_directive=no
591 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
592 if test $libc_cv_asm_symver_directive = yes; then
593 cat > conftest.s <<EOF
596 .symver _sym,sym@VERS
598 cat > conftest.map <<EOF
603 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
604 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
605 -nostartfiles -nostdlib
606 -Wl,--version-script,conftest.map
609 libc_cv_ld_version_script_option=yes
611 libc_cv_ld_version_script_option=no
614 libc_cv_ld_version_script_option=no
617 libc_cv_ld_version_script_option=no
620 if test $libc_cv_asm_symver_directive = yes &&
621 test $libc_cv_ld_version_script_option = yes &&
622 test $enable_versioning = yes; then
624 AC_DEFINE(DO_VERSIONING)
630 if test $elf = yes; then
631 AC_CACHE_CHECK(for .previous assembler directive,
632 libc_cv_asm_previous_directive, [dnl
633 cat > conftest.s <<EOF
637 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
638 libc_cv_asm_previous_directive=yes
640 libc_cv_asm_previous_directive=no
643 if test $libc_cv_asm_previous_directive = yes; then
644 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
646 AC_CACHE_CHECK(for .popsection assembler directive,
647 libc_cv_asm_popsection_directive, [dnl
648 cat > conftest.s <<EOF
649 .pushsection foo_section
652 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
653 libc_cv_asm_popsection_directive=yes
655 libc_cv_asm_popsection_directive=no
658 if test $libc_cv_asm_popsection_directive = yes; then
659 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
664 if test $elf != yes; then
665 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
666 [AC_TRY_COMPILE(, [asm (".section .init");
667 asm (".section .fini");
669 libc_cv_have_initfini=yes,
670 libc_cv_have_initfini=no)])
671 AC_SUBST(libc_cv_have_initfini)dnl
672 if test $libc_cv_have_initfini = yes; then
673 AC_DEFINE(HAVE_INITFINI)
677 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
678 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
679 [cat > conftest.$ac_ext <<EOF
680 dnl This sometimes fails to find confdefs.h, for some reason.
681 dnl [#]line __oline__ "[$]0"
682 [#]line __oline__ "configure"
683 #include "confdefs.h"
684 void underscore_test(void) {
687 if AC_TRY_EVAL(ac_compile); then
688 if grep _underscore_test conftest* >/dev/null; then
689 ifelse([$1], , :, [rm -f conftest*
692 ifelse([$2], , , [rm -f conftest*
696 echo "configure: failed program was:" >&AC_FD_CC
697 cat conftest.$ac_ext >&AC_FD_CC
698 ifelse([$2], , , [rm -f conftest*
703 if test $elf = yes; then
704 libc_cv_asm_underscores=no
706 if test $ac_cv_prog_cc_works = yes; then
707 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
708 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
709 libc_cv_asm_underscores=yes,
710 libc_cv_asm_underscores=no)])
712 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
713 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
714 libc_cv_asm_underscores=no)])
717 if test $libc_cv_asm_underscores = no; then
718 AC_DEFINE(NO_UNDERSCORES)
721 if test $elf = yes; then
722 libc_cv_weak_symbols=yes
723 libc_cv_asm_weak_directive=yes
724 libc_cv_asm_weakext_directive=no
726 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
728 cat > conftest.s <<EOF
730 ${libc_cv_asm_global_directive} foo
735 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
736 libc_cv_asm_weak_directive=yes
738 libc_cv_asm_weak_directive=no
742 if test $libc_cv_asm_weak_directive = no; then
743 AC_CACHE_CHECK(for assembler .weakext directive,
744 libc_cv_asm_weakext_directive,
746 cat > conftest.s <<EOF
748 ${libc_cv_asm_global_directive} foo
753 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
754 libc_cv_asm_weakext_directive=yes
756 libc_cv_asm_weakext_directive=no
763 if test $libc_cv_asm_weak_directive = yes; then
764 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
765 elif test $libc_cv_asm_weakext_directive = yes; then
766 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
769 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
770 cat > conftest.c <<\EOF
775 dnl No \ in command here because it ends up inside ''.
776 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
777 -nostdlib -nostartfiles -Wl,--no-whole-archive
778 -o conftest conftest.c 1>&AC_FD_CC]); then
779 libc_cv_ld_no_whole_archive=yes
781 libc_cv_ld_no_whole_archive=no
784 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
786 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
787 cat > conftest.c <<\EOF
792 dnl No \ in command here because it ends up inside ''.
793 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
794 -nostdlib -nostartfiles -fno-exceptions
795 -o conftest conftest.c 1>&AC_FD_CC]); then
796 libc_cv_gcc_no_exceptions=yes
798 libc_cv_gcc_no_exceptions=no
801 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
803 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
804 [cat > conftest.c <<EOF
805 #line __oline__ "configure"
806 static char __EH_FRAME_BEGIN__[];
809 __register_frame (__EH_FRAME_BEGIN__);
810 __deregister_frame (__EH_FRAME_BEGIN__);
814 /* FIXME: this is fragile. */
824 dnl No \ in command here because it ends up inside ''.
825 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
826 -nostdlib -nostartfiles
827 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
828 libc_cv_gcc_dwarf2_unwind_info=yes
830 libc_cv_gcc_dwarf2_unwind_info=no
833 if test $libc_cv_gcc_dwarf2_unwind_info = yes; then
834 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
837 ### End of automated tests.
838 ### Now run sysdeps configure fragments.
840 # sysdeps configure fragments may set these with files to be linked below.
844 # Iterate over all the sysdep directories we will use, running their
845 # configure fragments, and looking for a uname implementation.
847 for dir in $sysnames; do
850 *) dest=$srcdir/$dir ;;
852 if test -r $dest/configure; then
853 AC_MSG_RESULT(running configure fragment for $dest)
857 if test -z "$uname"; then
858 if test -r $dest/uname.c ||
859 test -r $dest/uname.S ||
860 { test -r $dest/syscalls.list &&
861 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
868 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
870 # If we will use the generic uname implementation, we must figure out what
871 # it will say by examining the system, and write the results in config-name.h.
872 if test "$uname" = "sysdeps/generic"; then
875 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
877 if test $uname_sysname != $config_os; then
878 config_release=`echo $config_os | sed s/$uname_sysname//`
881 AC_DEFUN(LIBC_KERNEL_ID, [dnl
882 if test -r /vmunix; then
883 kernel_id=`strings /vmunix | grep UNIX`
884 elif test -r /dynix; then
885 kernel_id=`strings /dynix | grep DYNIX`
891 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
892 AC_REQUIRE([LIBC_KERNEL_ID])dnl
894 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
896 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
897 != x$config_release; then
898 # The configuration release is a substring of the kernel release.
899 libc_cv_uname_release=$kernel_release
900 elif test x$config_release != x; then
901 libc_cv_uname_release=$config_release
902 elif test x$kernel_release != x; then
903 libc_cv_uname_release=$kernel_release
905 libc_cv_uname_release=unknown
907 uname_release="$libc_cv_uname_release"
909 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
910 AC_REQUIRE([LIBC_KERNEL_ID])dnl
912 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
914 if test -n "$kernel_version"; then
915 libc_cv_uname_version="$kernel_version"
917 libc_cv_uname_version=unknown
919 uname_version="$libc_cv_uname_version"
921 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
922 config_uname=config-name.h:config-name.in
924 # For non-generic uname, we don't need to create config-name.h at all.
928 AC_MSG_CHECKING(stdio selection)
931 libio) AC_DEFINE(USE_IN_LIBIO) ;;
932 default) stdio=stdio ;;
934 AC_MSG_RESULT($stdio)
936 AC_MSG_CHECKING(ldap selection)
947 AC_SUBST(libc_cv_slibdir)
948 AC_SUBST(libc_cv_sysconfdir)
949 AC_SUBST(libc_cv_rootsbindir)
951 AC_SUBST(has_ldconfig)
953 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
954 if test $gnu_ld = yes; then
955 AC_DEFINE(HAVE_GNU_LD)
957 if test $gnu_as = yes; then
958 AC_DEFINE(HAVE_GNU_AS)
960 if test $elf = yes; then
966 if test $shared = default; then
967 if test $gnu_ld = yes; then
970 # For now we do not assume shared libs are available. In future more
971 # tests might become available.
976 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
978 cat > conftest.c <<EOF
979 #if defined(__PIC__) || defined(__pic__) || defined(PIC) || defined(pic)
980 # error PIC is default.
983 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
987 AC_SUBST(pic_default)
993 AC_SUBST(nopic_initfini)
997 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1000 config_makefile=Makefile
1003 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
1006 if test $libc_cv_gcc_pipe_bug = yes; then
1011 AC_OUTPUT_COMMANDS([
1012 if test "$realCC"; then
1013 sed -e 's/%{pipe:-}/%|/g' `$realCC -print-file-name=specs` >specsT
1015 fi], [realCC=$realCC])
1017 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1018 [echo '$config_vars' >> config.make; test -d bits || mkdir bits])