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[=DIR1,DIR2]... configure and build add-ons in DIR1,DIR2,...
85 search for add-ons if no parameter given],
87 yes) add_ons=`echo $srcdir/*/configure | \
88 sed -e "s!$srcdir/!!g" -e 's!/configure!!g'`;;
89 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
93 AC_CONFIG_SUBDIRS($add_ons)
95 if test x"$add_ons" != x; then
97 # Test whether such a subdir really exists.
98 if test -d $srcdir/$f; then
99 add_ons_pfx="$add_ons_pfx $f/"
101 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
106 dnl On some platforms we cannot use dynamic loading. We must provide
107 dnl static NSS modules.
108 AC_ARG_ENABLE(static-nss, dnl
109 [ --enable-static-nss build static NSS modules [default=no]],
110 static_nss=$enableval, static_nss=no)
111 if test x"$static_nss" = xyes; then
112 AC_DEFINE(DO_STATIC_NSS)
117 # The way shlib-versions is used to generate soversions.mk uses a
118 # fairly simplistic model for name recognition that can't distinguish
119 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
120 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
121 # tell. This doesn't get used much beyond that, so it's fairly safe.
126 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
131 ### I put this here to prevent those annoying emails from people who cannot
132 ### read and try to compile glibc on unsupported platforms. --drepper
134 ### By using the undocumented --enable-hacker-mode option for configure
135 ### one can skip this test to make the configuration not fail for unsupported
138 if test -z "$enable_hacker_mode"; then
143 echo "*** The GNU C library is currently not available for this platform."
144 echo "*** So far nobody cared to port it and if there is no volunteer it"
145 echo "*** might never happen. So, if you have interest to see glibc on"
146 echo "*** this platform visit"
147 echo "*** http://www.gnu.ai.mit.edu/software/libc/porting.html"
148 echo "*** and join the group of porters"
154 # We keep the original values in `$config_*' and never modify them, so we
155 # can write them unchanged into config.make. Everything else uses
156 # $machine, $vendor, and $os, and changes them whenever convenient.
157 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
159 # Some configurations imply other options.
161 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
162 # These systems always use GNU tools.
163 gnu_ld=yes gnu_as=yes ;;
166 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
167 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
169 gnu* | linux* | sysv4* | solaris2*)
170 # These systems (almost) always use the ELF format.
175 machine=$config_machine
176 vendor=$config_vendor
179 dnl We need to use [ and ] for other purposes for a while now.
181 # Expand the configuration machine name into a subdirectory by architecture
182 # type and particular chip.
184 a29k | am29000) base_machine=a29k machine=a29k ;;
185 alpha*) base_machine=alpha machine=alpha/$machine ;;
186 arm*) base_machine=arm machine=arm/$machine ;;
187 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
188 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
189 hppa*) base_machine=hppa machine=hppa/$machine ;;
190 i[3456]86) base_machine=i386 machine=i386/$machine ;;
191 m680?0) base_machine=m68k machine=m68k/$machine ;;
192 m68k) base_machine=m68k machine=m68k/m68020 ;;
193 m88???) base_machine=m88k machine=m88k/$machine ;;
194 m88k) base_machine=m88k machine=m88k/m88100 ;;
195 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
196 mips*) base_machine=mips machine=mips/$machine ;;
198 base_machine=sparc machine=sparc/sparc32 ;;
199 sparcv8 | supersparc | hypersparc)
200 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
201 sparc64 | ultrasparc)
202 base_machine=sparc machine=sparc/sparc64 ;;
205 AC_SUBST(base_machine)
207 if test "$base_machine" = "i386"; then
208 AC_DEFINE(USE_REGPARMS)
211 # Compute the list of sysdep directories for this configuration.
212 # This can take a while to compute.
213 sysdep_dir=$srcdir/sysdeps
214 AC_MSG_CHECKING(sysdep dirs)
215 dnl We need to use [ and ] for other purposes for a while now.
217 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
218 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
223 netbsd* | 386bsd* | freebsd* | bsdi*)
224 base_os=unix/bsd/bsd4.4 ;;
225 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
227 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
230 base_os=unix/sysv/sysv4 ;;
232 base_os=standalone ;;
237 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
240 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
244 o=`echo $tail | sed 's/[0-9]*$//'`
245 if test $o != $tail; then
248 # For linux-gnu, try linux-gnu, then linux.
249 o=`echo $tail | sed 's/-.*$//'`
250 if test $o != $tail; then
254 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
257 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
263 # For sparc/sparc9, try sparc/sparc9 and then sparc.
266 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
268 # Prepend the machine's FPU directory unless --without-fp.
269 if test "$with_fp" = yes; then
276 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
279 # Find what sysdep directories exist.
281 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
282 for d in $add_ons_pfx ''; do
283 for b in $base ''; do
284 for m0 in $mach ''; do
285 for v in /$vendor ''; do
286 for o in /$ostry ''; do
287 for m in $mach ''; do
288 if test "$m0$b$v$o$m"; then
289 try="${d}sysdeps$m0$b$v$o$m"
290 test -n "$enable_debug_configure" &&
291 echo "$0 [DEBUG]: try $try" >&2
294 *) dest=$srcdir/$try ;;
296 if test -d $dest; then
297 sysnames="$sysnames $try"
298 { test -n "$o" || test -n "$b"; } && os_used=t
299 { test -n "$m" || test -n "$m0"; } && machine_used=t
310 if test -z "$os_used" && test "$os" != none; then
311 AC_MSG_ERROR(Operating system $os is not supported.)
313 if test -z "$machine_used" && test "$machine" != none; then
314 AC_MSG_ERROR(The $machine is not supported.)
317 # We have now validated the configuration.
320 # If using ELF, look for an `elf' subdirectory of each machine directory.
321 # We prepend these rather than inserting them whereever the machine appears
322 # because things specified by the machine's ELF ABI should override
323 # OS-specific things, and should always be the same for any OS on the
324 # machine (otherwise what's the point of an ABI?).
325 if test "$elf" = yes; then
327 for d in $add_ons_pfx ''; do
330 *) xsrcdir=$srcdir/ ;;
333 if test -d $xsrcdir${d}sysdeps$m/elf; then
334 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
338 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
342 # Expand the list of system names into a full list of directories
343 # from each element's parent name and Implies file (if present).
346 while test $# -gt 0; do
350 case " $names " in *" $name "*)
351 # Already in the list.
355 # Report each name as we discover it, so there is no long pause in output.
356 echo $ac_n "$name $ac_c" >&AC_FD_MSG
358 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
362 *) xsrcdir=$srcdir/ ;;
364 test -n "$enable_debug_configure" &&
365 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
367 if test -f $xsrcdir$name/Implies; then
368 # Collect more names from the `Implies' file (removing comments).
369 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
371 for x in $implied_candidate; do
372 if test -d $xsrcdir$name_base/$x; then
373 implied="$implied $name_base/$x";
375 AC_MSG_WARN($name/Implies specifies nonexistent $x)
382 # Add NAME to the list of names.
385 # Find the parent of NAME, using the empty string if it has none.
387 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
390 # Add the names implied by NAME, and NAME's parent (if it has one), to
391 # the list of names to be processed (the argument list). We prepend the
392 # implied names to the list and append the parent. We want implied
393 # directories to come before further directories inferred from the
394 # configuration components; this ensures that for sysv4, unix/common
395 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
397 sysnames="`echo $implied $* $parent`"
398 test -n "$sysnames" && set $sysnames
401 # Add the default directories.
402 sysnames="$names sysdeps/generic"
404 # The other names were emitted during the scan.
405 AC_MSG_RESULT(sysdeps/generic)
411 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
412 # The makefiles need to use a different form to find it in $srcdir.
413 INSTALL='\$(..)./install-sh -c'
416 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
417 AC_CHECK_PROG(MAKEINFO, makeinfo, makeinfo)
418 if test "$MAKEINFO"; then
419 changequote(,)dnl Need [] for regexps.
420 if $MAKEINFO --version | grep 'texinfo 3\.[1-9][1-9]' >/dev/null 2>&1
422 then : # Makeinfo 3.11 or greater, works.
425 *** makeinfo is too old (need version 3.11 or better).
426 *** You should install the needed version and re-configure since otherwise
427 *** you won't get the info pages installed.])
434 if test $host != $build; then
435 AC_CHECK_PROGS(BUILD_CC, gcc cc)
437 AC_SUBST(cross_compiling)
440 AC_CHECK_TOOL(AR, ar)
441 AC_CHECK_TOOL(RANLIB, ranlib, :)
443 AC_PATH_PROG(BASH, bash, no)
444 if test "$BASH" != no &&
445 $BASH -c 'test "$BASH_VERSINFO" \
446 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
447 libc_cv_have_bash2=yes
449 libc_cv_have_bash2=no
451 AC_SUBST(libc_cv_have_bash2)
453 dnl We need a ksh compatible shell for tzselect.
454 if test "$BASH" = no; then
455 AC_PATH_PROG(KSH, ksh, no)
456 if test "$KSH" = no; then
466 AC_SUBST(libc_cv_have_ksh)
468 AC_PATH_PROGS(PERL, perl, no)
471 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
472 echo '#include <stddef.h>
473 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
474 if eval "$ac_cpp conftest.c 2>/dev/null" \
475 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
476 libc_cv_signed_size_t=no
478 libc_cv_signed_size_t=yes
481 if test $libc_cv_signed_size_t = yes; then
482 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
483 cat >> confdefs.h <<\EOF
485 #define __SIZE_TYPE__ unsigned
489 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
491 [#define __need_size_t
492 #define __need_wchar_t
495 #include <stddef.h>], [size_t size; wchar_t wchar;
497 #error stddef.h ignored __need_*
499 if (&size == NULL || &wchar == NULL) abort ();],
500 libc_cv_friendly_stddef=yes,
501 libc_cv_friendly_stddef=no)])
502 if test $libc_cv_friendly_stddef = yes; then
503 config_vars="$config_vars
504 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
507 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
508 libc_cv_need_minus_P, [dnl
509 cat > conftest.S <<EOF
510 #include "confdefs.h"
511 /* Nothing whatsoever. */
513 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
514 libc_cv_need_minus_P=no
516 libc_cv_need_minus_P=yes
519 if test $libc_cv_need_minus_P = yes; then
520 config_vars="$config_vars
521 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
524 # gcc 2.7.x has a bug where if -pipe is set, the assembler will always
525 # be told to read stdin. This causes the compiler to hang when fed an
527 if test $ac_cv_prog_gcc = yes; then
528 case `${CC-cc} -v 2>&1` in
530 # We must check this even if -pipe is not given here, because the user
531 # might do `make CFLAGS=-pipe'.
532 AC_CACHE_CHECK(for gcc 2.7.x -pipe bug, libc_cv_gcc_pipe_bug, [dnl
533 cp /dev/null conftest.s
534 cat >conftest1.s <<EOF
537 if ${CC-cc} -pipe -c conftest.s <conftest1.s 2>/dev/null; then
538 libc_cv_gcc_pipe_bug=no
540 libc_cv_gcc_pipe_bug=yes
543 if test $libc_cv_gcc_pipe_bug = yes; then
544 makeCC="${CC-cc} -B\$(common-objpfx)"
546 CFLAGS=`echo $CFLAGS |sed 's/-pipe//'`
548 *) libc_cv_gcc_pipe_bug=no;;
551 libc_cv_gcc_pipe_bug=no
554 AC_CACHE_CHECK(for assembler global-symbol directive,
555 libc_cv_asm_global_directive, [dnl
556 libc_cv_asm_global_directive=UNKNOWN
557 for ac_globl in .globl .global; do
558 cat > conftest.s <<EOF
563 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
564 libc_cv_asm_global_directive=${ac_globl}
567 test $libc_cv_asm_global_directive != UNKNOWN && break
569 if test $libc_cv_asm_global_directive = UNKNOWN; then
570 AC_MSG_ERROR(cannot determine asm global directive)
572 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
575 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
576 cat > conftest.s <<EOF
579 .set glibc_conftest_frobozz,foo
580 $libc_cv_asm_global_directive glibc_conftest_frobozz
582 # The alpha-dec-osf1 assembler gives only a warning for `.set'
583 # (but it doesn't work), so we must do a linking check to be sure.
584 cat > conftest1.c <<\EOF
585 extern int glibc_conftest_frobozz;
586 main () { printf ("%d\n", glibc_conftest_frobozz); }
588 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
589 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
590 libc_cv_asm_set_directive=yes
592 libc_cv_asm_set_directive=no
595 if test $libc_cv_asm_set_directive = yes; then
596 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
599 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
600 [cat > conftest.s <<EOF
603 .symver _sym,sym@VERS
605 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
606 libc_cv_asm_symver_directive=yes
608 libc_cv_asm_symver_directive=no
611 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
612 if test $libc_cv_asm_symver_directive = yes; then
613 cat > conftest.s <<EOF
616 .symver _sym,sym@VERS
618 cat > conftest.map <<EOF
627 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
628 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
629 -nostartfiles -nostdlib
630 -Wl,--version-script,conftest.map
633 libc_cv_ld_version_script_option=yes
635 libc_cv_ld_version_script_option=no
638 libc_cv_ld_version_script_option=no
641 libc_cv_ld_version_script_option=no
644 if test $libc_cv_asm_symver_directive = yes &&
645 test $libc_cv_ld_version_script_option = yes &&
646 test $enable_versioning = yes; then
648 AC_DEFINE(DO_VERSIONING)
654 if test $VERSIONING = no; then
656 *** WARNING: You should not compile GNU libc without versioning. Not using
657 *** versioning will introduce incompatibilities so that old binaries
658 *** will not run anymore.
659 *** For versioning you need recent binutils (binutils-2.8.1.0.17 or newer)."
661 if test $elf = yes; then
662 AC_CACHE_CHECK(for .previous assembler directive,
663 libc_cv_asm_previous_directive, [dnl
664 cat > conftest.s <<EOF
668 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
669 libc_cv_asm_previous_directive=yes
671 libc_cv_asm_previous_directive=no
674 if test $libc_cv_asm_previous_directive = yes; then
675 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
677 AC_CACHE_CHECK(for .popsection assembler directive,
678 libc_cv_asm_popsection_directive, [dnl
679 cat > conftest.s <<EOF
680 .pushsection foo_section
683 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
684 libc_cv_asm_popsection_directive=yes
686 libc_cv_asm_popsection_directive=no
689 if test $libc_cv_asm_popsection_directive = yes; then
690 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
695 if test $elf != yes; then
696 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
697 [AC_TRY_COMPILE(, [asm (".section .init");
698 asm (".section .fini");
700 libc_cv_have_initfini=yes,
701 libc_cv_have_initfini=no)])
702 AC_SUBST(libc_cv_have_initfini)dnl
703 if test $libc_cv_have_initfini = yes; then
704 AC_DEFINE(HAVE_INITFINI)
708 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
709 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
710 [cat > conftest.$ac_ext <<EOF
711 dnl This sometimes fails to find confdefs.h, for some reason.
712 dnl [#]line __oline__ "[$]0"
713 [#]line __oline__ "configure"
714 #include "confdefs.h"
715 void underscore_test(void) {
718 if AC_TRY_EVAL(ac_compile); then
719 if grep _underscore_test conftest* >/dev/null; then
720 ifelse([$1], , :, [rm -f conftest*
723 ifelse([$2], , , [rm -f conftest*
727 echo "configure: failed program was:" >&AC_FD_CC
728 cat conftest.$ac_ext >&AC_FD_CC
729 ifelse([$2], , , [rm -f conftest*
734 if test $elf = yes; then
735 libc_cv_asm_underscores=no
737 if test $ac_cv_prog_cc_works = yes; then
738 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
739 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
740 libc_cv_asm_underscores=yes,
741 libc_cv_asm_underscores=no)])
743 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
744 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
745 libc_cv_asm_underscores=no)])
748 if test $libc_cv_asm_underscores = no; then
749 AC_DEFINE(NO_UNDERSCORES)
752 if test $elf = yes; then
753 libc_cv_weak_symbols=yes
754 libc_cv_asm_weak_directive=yes
755 libc_cv_asm_weakext_directive=no
757 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
759 cat > conftest.s <<EOF
761 ${libc_cv_asm_global_directive} foo
766 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
767 libc_cv_asm_weak_directive=yes
769 libc_cv_asm_weak_directive=no
773 if test $libc_cv_asm_weak_directive = no; then
774 AC_CACHE_CHECK(for assembler .weakext directive,
775 libc_cv_asm_weakext_directive,
777 cat > conftest.s <<EOF
779 ${libc_cv_asm_global_directive} foo
784 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
785 libc_cv_asm_weakext_directive=yes
787 libc_cv_asm_weakext_directive=no
794 if test $libc_cv_asm_weak_directive = yes; then
795 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
796 elif test $libc_cv_asm_weakext_directive = yes; then
797 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
800 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
801 cat > conftest.c <<\EOF
806 dnl No \ in command here because it ends up inside ''.
807 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
808 -nostdlib -nostartfiles -Wl,--no-whole-archive
809 -o conftest conftest.c 1>&AC_FD_CC]); then
810 libc_cv_ld_no_whole_archive=yes
812 libc_cv_ld_no_whole_archive=no
815 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
817 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
818 cat > conftest.c <<\EOF
823 dnl No \ in command here because it ends up inside ''.
824 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
825 -nostdlib -nostartfiles -fno-exceptions
826 -o conftest conftest.c 1>&AC_FD_CC]); then
827 libc_cv_gcc_no_exceptions=yes
829 libc_cv_gcc_no_exceptions=no
832 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
834 if test "$base_machine" = alpha ; then
835 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
836 cat > conftest.c <<\EOF
840 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep '$foo..ng' > /dev/null]);
842 libc_cv_gcc_alpha_ng_prefix=yes
844 libc_cv_gcc_alpha_ng_prefix=no
847 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
848 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
850 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
854 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
855 [cat > conftest.c <<EOF
856 #line __oline__ "configure"
857 static char __EH_FRAME_BEGIN__[];
860 __register_frame (__EH_FRAME_BEGIN__);
861 __deregister_frame (__EH_FRAME_BEGIN__);
865 /* FIXME: this is fragile. */
875 dnl No \ in command here because it ends up inside ''.
876 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
877 -nostdlib -nostartfiles
878 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
879 libc_cv_gcc_dwarf2_unwind_info=yes
881 libc_cv_gcc_dwarf2_unwind_info=no
884 if test $libc_cv_gcc_dwarf2_unwind_info = yes; then
885 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
888 ### End of automated tests.
889 ### Now run sysdeps configure fragments.
891 # sysdeps configure fragments may set these with files to be linked below.
895 # Iterate over all the sysdep directories we will use, running their
896 # configure fragments, and looking for a uname implementation.
898 for dir in $sysnames; do
901 *) dest=$srcdir/$dir ;;
903 if test -r $dest/configure; then
904 AC_MSG_RESULT(running configure fragment for $dest)
908 if test -z "$uname"; then
909 if test -r $dest/uname.c ||
910 test -r $dest/uname.S ||
911 { test -r $dest/syscalls.list &&
912 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
919 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
921 # If we will use the generic uname implementation, we must figure out what
922 # it will say by examining the system, and write the results in config-name.h.
923 if test "$uname" = "sysdeps/generic"; then
926 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
928 if test $uname_sysname != $config_os; then
929 config_release=`echo $config_os | sed s/$uname_sysname//`
932 AC_DEFUN(LIBC_KERNEL_ID, [dnl
933 if test -r /vmunix; then
934 kernel_id=`strings /vmunix | grep UNIX`
935 elif test -r /dynix; then
936 kernel_id=`strings /dynix | grep DYNIX`
942 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
943 AC_REQUIRE([LIBC_KERNEL_ID])dnl
945 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
947 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
948 != x$config_release; then
949 # The configuration release is a substring of the kernel release.
950 libc_cv_uname_release=$kernel_release
951 elif test x$config_release != x; then
952 libc_cv_uname_release=$config_release
953 elif test x$kernel_release != x; then
954 libc_cv_uname_release=$kernel_release
956 libc_cv_uname_release=unknown
958 uname_release="$libc_cv_uname_release"
960 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
961 AC_REQUIRE([LIBC_KERNEL_ID])dnl
963 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
965 if test -n "$kernel_version"; then
966 libc_cv_uname_version="$kernel_version"
968 libc_cv_uname_version=unknown
970 uname_version="$libc_cv_uname_version"
972 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
973 config_uname=config-name.h:config-name.in
975 # For non-generic uname, we don't need to create config-name.h at all.
979 AC_MSG_CHECKING(stdio selection)
982 libio) AC_DEFINE(USE_IN_LIBIO) ;;
983 default) stdio=stdio ;;
985 AC_MSG_RESULT($stdio)
987 AC_MSG_CHECKING(ldap selection)
998 AC_SUBST(libc_cv_slibdir)
999 AC_SUBST(libc_cv_sysconfdir)
1000 AC_SUBST(libc_cv_rootsbindir)
1002 AC_SUBST(has_ldconfig)
1004 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1005 if test $gnu_ld = yes; then
1006 AC_DEFINE(HAVE_GNU_LD)
1008 if test $gnu_as = yes; then
1009 AC_DEFINE(HAVE_GNU_AS)
1011 if test $elf = yes; then
1017 if test $shared = default; then
1018 if test $gnu_ld = yes; then
1021 # For now we do not assume shared libs are available. In future more
1022 # tests might become available.
1027 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1029 cat > conftest.c <<EOF
1030 #if defined(__PIC__) || defined(__pic__) || defined(PIC) || defined(pic)
1031 # error PIC is default.
1034 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1038 AC_SUBST(pic_default)
1043 AC_SUBST(static_nss)
1044 AC_SUBST(nopic_initfini)
1048 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1051 config_makefile=Makefile
1054 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
1057 if test $libc_cv_gcc_pipe_bug = yes; then
1062 AC_OUTPUT_COMMANDS([
1063 if test "$realCC"; then
1064 sed -e 's/%{pipe:-}/%|/g' `$realCC -print-file-name=specs` >specsT
1066 fi], [realCC=$realCC])
1068 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1069 [echo '$config_vars' >> config.make; test -d bits || mkdir bits])