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) if test "$srcdir" = "."; then
88 add_ons=`echo */configure | sed -e 's!/configure!!g'`
90 add_ons=`echo $srcdir/*/configure | \
91 sed -e "s!^$srcdir/!!g" -e 's!/configure!!g'`
93 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
97 AC_CONFIG_SUBDIRS($add_ons)
99 if test x"$add_ons" != x; then
100 for f in $add_ons; do
101 # Test whether such a subdir really exists.
102 if test -d $srcdir/$f; then
103 add_ons_pfx="$add_ons_pfx $f/"
105 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
110 dnl On some platforms we cannot use dynamic loading. We must provide
111 dnl static NSS modules.
112 AC_ARG_ENABLE(static-nss, dnl
113 [ --enable-static-nss build static NSS modules [default=no]],
114 static_nss=$enableval, static_nss=no)
115 if test x"$static_nss" = xyes; then
116 AC_DEFINE(DO_STATIC_NSS)
121 # The way shlib-versions is used to generate soversions.mk uses a
122 # fairly simplistic model for name recognition that can't distinguish
123 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
124 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
125 # tell. This doesn't get used much beyond that, so it's fairly safe.
130 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
135 ### I put this here to prevent those annoying emails from people who cannot
136 ### read and try to compile glibc on unsupported platforms. --drepper
138 ### By using the undocumented --enable-hacker-mode option for configure
139 ### one can skip this test to make the configuration not fail for unsupported
142 if test -z "$enable_hacker_mode"; then
147 echo "*** The GNU C library is currently not available for this platform."
148 echo "*** So far nobody cared to port it and if there is no volunteer it"
149 echo "*** might never happen. So, if you have interest to see glibc on"
150 echo "*** this platform visit"
151 echo "*** http://www.gnu.org/software/libc/porting.html"
152 echo "*** and join the group of porters"
158 # We keep the original values in `$config_*' and never modify them, so we
159 # can write them unchanged into config.make. Everything else uses
160 # $machine, $vendor, and $os, and changes them whenever convenient.
161 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
163 # Some configurations imply other options.
165 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
166 # These systems always use GNU tools.
167 gnu_ld=yes gnu_as=yes ;;
170 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
171 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
173 gnu* | linux* | sysv4* | solaris2*)
174 # These systems (almost) always use the ELF format.
179 machine=$config_machine
180 vendor=$config_vendor
183 dnl We need to use [ and ] for other purposes for a while now.
185 # Expand the configuration machine name into a subdirectory by architecture
186 # type and particular chip.
188 a29k | am29000) base_machine=a29k machine=a29k ;;
189 alpha*) base_machine=alpha machine=alpha/$machine ;;
190 arm*) base_machine=arm machine=arm/$machine ;;
191 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
192 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
193 hppa*) base_machine=hppa machine=hppa/$machine ;;
194 i[3456]86) base_machine=i386 machine=i386/$machine ;;
195 m680?0) base_machine=m68k machine=m68k/$machine ;;
196 m68k) base_machine=m68k machine=m68k/m68020 ;;
197 m88???) base_machine=m88k machine=m88k/$machine ;;
198 m88k) base_machine=m88k machine=m88k/m88100 ;;
199 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
200 mips*) base_machine=mips machine=mips/$machine ;;
202 base_machine=sparc machine=sparc/sparc32 ;;
203 sparcv8 | supersparc | hypersparc)
204 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
205 sparc64 | ultrasparc)
206 base_machine=sparc machine=sparc/sparc64 ;;
209 AC_SUBST(base_machine)
211 if test "$base_machine" = "i386"; then
212 AC_DEFINE(USE_REGPARMS)
215 # Compute the list of sysdep directories for this configuration.
216 # This can take a while to compute.
217 sysdep_dir=$srcdir/sysdeps
218 AC_MSG_CHECKING(sysdep dirs)
219 dnl We need to use [ and ] for other purposes for a while now.
221 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
222 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
227 netbsd* | 386bsd* | freebsd* | bsdi*)
228 base_os=unix/bsd/bsd4.4 ;;
229 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
231 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
234 base_os=unix/sysv/sysv4 ;;
236 base_os=standalone ;;
241 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
244 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
248 o=`echo $tail | sed 's/[0-9]*$//'`
249 if test $o != $tail; then
252 # For linux-gnu, try linux-gnu, then linux.
253 o=`echo $tail | sed 's/-.*$//'`
254 if test $o != $tail; then
258 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
261 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
267 # For sparc/sparc9, try sparc/sparc9 and then sparc.
270 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
272 # Prepend the machine's FPU directory unless --without-fp.
273 if test "$with_fp" = yes; then
280 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
283 # Find what sysdep directories exist.
285 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
286 for d in $add_ons_pfx ''; do
287 for b in $base ''; do
288 for m0 in $mach ''; do
289 for v in /$vendor ''; do
290 for o in /$ostry ''; do
291 for m in $mach ''; do
292 if test "$m0$b$v$o$m"; then
293 try="${d}sysdeps$m0$b$v$o$m"
294 test -n "$enable_debug_configure" &&
295 echo "$0 [DEBUG]: try $try" >&2
298 *) dest=$srcdir/$try ;;
300 if test -d $dest; then
301 sysnames="$sysnames $try"
302 { test -n "$o" || test -n "$b"; } && os_used=t
303 { test -n "$m" || test -n "$m0"; } && machine_used=t
314 if test -z "$os_used" && test "$os" != none; then
315 AC_MSG_ERROR(Operating system $os is not supported.)
317 if test -z "$machine_used" && test "$machine" != none; then
318 AC_MSG_ERROR(The $machine is not supported.)
321 # We have now validated the configuration.
324 # If using ELF, look for an `elf' subdirectory of each machine directory.
325 # We prepend these rather than inserting them whereever the machine appears
326 # because things specified by the machine's ELF ABI should override
327 # OS-specific things, and should always be the same for any OS on the
328 # machine (otherwise what's the point of an ABI?).
329 if test "$elf" = yes; then
331 for d in $add_ons_pfx ''; do
334 *) xsrcdir=$srcdir/ ;;
337 if test -d $xsrcdir${d}sysdeps$m/elf; then
338 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
342 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
346 # Expand the list of system names into a full list of directories
347 # from each element's parent name and Implies file (if present).
350 while test $# -gt 0; do
354 case " $names " in *" $name "*)
355 # Already in the list.
359 # Report each name as we discover it, so there is no long pause in output.
360 echo $ac_n "$name $ac_c" >&AC_FD_MSG
362 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
366 *) xsrcdir=$srcdir/ ;;
368 test -n "$enable_debug_configure" &&
369 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
371 if test -f $xsrcdir$name/Implies; then
372 # Collect more names from the `Implies' file (removing comments).
373 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
375 for x in $implied_candidate; do
376 if test -d $xsrcdir$name_base/$x; then
377 implied="$implied $name_base/$x";
379 AC_MSG_WARN($name/Implies specifies nonexistent $x)
386 # Add NAME to the list of names.
389 # Find the parent of NAME, using the empty string if it has none.
391 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
394 # Add the names implied by NAME, and NAME's parent (if it has one), to
395 # the list of names to be processed (the argument list). We prepend the
396 # implied names to the list and append the parent. We want implied
397 # directories to come before further directories inferred from the
398 # configuration components; this ensures that for sysv4, unix/common
399 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
401 sysnames="`echo $implied $* $parent`"
402 test -n "$sysnames" && set $sysnames
405 # Add the default directories.
406 sysnames="$names sysdeps/generic"
408 # The other names were emitted during the scan.
409 AC_MSG_RESULT(sysdeps/generic)
415 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
416 # The makefiles need to use a different form to find it in $srcdir.
417 INSTALL='\$(..)./install-sh -c'
420 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
421 AC_CHECK_PROG(MAKEINFO, makeinfo, makeinfo)
422 if test "$MAKEINFO"; then
423 changequote(,)dnl Need [] for regexps.
424 if $MAKEINFO --version | grep 'texinfo 3\.[1-9][1-9]' >/dev/null 2>&1
426 then : # Makeinfo 3.11 or greater, works.
429 *** makeinfo is too old (need version 3.11 or better).
430 *** You should install the needed version and re-configure since otherwise
431 *** you won't get the info pages installed.])
438 if test $host != $build; then
439 AC_CHECK_PROGS(BUILD_CC, gcc cc)
441 AC_SUBST(cross_compiling)
444 AC_CHECK_TOOL(AR, ar)
445 AC_CHECK_TOOL(RANLIB, ranlib, :)
447 AC_PATH_PROG(BASH, bash, no)
448 if test "$BASH" != no &&
449 $BASH -c 'test "$BASH_VERSINFO" \
450 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
451 libc_cv_have_bash2=yes
453 libc_cv_have_bash2=no
455 AC_SUBST(libc_cv_have_bash2)
457 dnl We need a ksh compatible shell for tzselect.
458 if test "$BASH" = no; then
459 AC_PATH_PROG(KSH, ksh, no)
460 if test "$KSH" = no; then
470 AC_SUBST(libc_cv_have_ksh)
472 AC_PATH_PROGS(PERL, perl, no)
475 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
476 echo '#include <stddef.h>
477 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
478 if eval "$ac_cpp conftest.c 2>/dev/null" \
479 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
480 libc_cv_signed_size_t=no
482 libc_cv_signed_size_t=yes
485 if test $libc_cv_signed_size_t = yes; then
486 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
487 cat >> confdefs.h <<\EOF
489 #define __SIZE_TYPE__ unsigned
493 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
495 [#define __need_size_t
496 #define __need_wchar_t
499 #include <stddef.h>], [size_t size; wchar_t wchar;
501 #error stddef.h ignored __need_*
503 if (&size == NULL || &wchar == NULL) abort ();],
504 libc_cv_friendly_stddef=yes,
505 libc_cv_friendly_stddef=no)])
506 if test $libc_cv_friendly_stddef = yes; then
507 config_vars="$config_vars
508 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
511 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
512 libc_cv_need_minus_P, [dnl
513 cat > conftest.S <<EOF
514 #include "confdefs.h"
515 /* Nothing whatsoever. */
517 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
518 libc_cv_need_minus_P=no
520 libc_cv_need_minus_P=yes
523 if test $libc_cv_need_minus_P = yes; then
524 config_vars="$config_vars
525 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
528 # gcc 2.7.x has a bug where if -pipe is set, the assembler will always
529 # be told to read stdin. This causes the compiler to hang when fed an
531 if test $ac_cv_prog_gcc = yes; then
532 case `${CC-cc} -v 2>&1` in
534 # We must check this even if -pipe is not given here, because the user
535 # might do `make CFLAGS=-pipe'.
536 AC_CACHE_CHECK(for gcc 2.7.x -pipe bug, libc_cv_gcc_pipe_bug, [dnl
537 cp /dev/null conftest.s
538 cat >conftest1.s <<EOF
541 if ${CC-cc} -pipe -c conftest.s <conftest1.s 2>/dev/null; then
542 libc_cv_gcc_pipe_bug=no
544 libc_cv_gcc_pipe_bug=yes
547 if test $libc_cv_gcc_pipe_bug = yes; then
548 makeCC="${CC-cc} -B\$(common-objpfx)"
550 CFLAGS=`echo $CFLAGS |sed 's/-pipe//'`
552 *) libc_cv_gcc_pipe_bug=no;;
555 libc_cv_gcc_pipe_bug=no
558 AC_CACHE_CHECK(for assembler global-symbol directive,
559 libc_cv_asm_global_directive, [dnl
560 libc_cv_asm_global_directive=UNKNOWN
561 for ac_globl in .globl .global; do
562 cat > conftest.s <<EOF
567 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
568 libc_cv_asm_global_directive=${ac_globl}
571 test $libc_cv_asm_global_directive != UNKNOWN && break
573 if test $libc_cv_asm_global_directive = UNKNOWN; then
574 AC_MSG_ERROR(cannot determine asm global directive)
576 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
579 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
580 cat > conftest.s <<EOF
583 .set glibc_conftest_frobozz,foo
584 $libc_cv_asm_global_directive glibc_conftest_frobozz
586 # The alpha-dec-osf1 assembler gives only a warning for `.set'
587 # (but it doesn't work), so we must do a linking check to be sure.
588 cat > conftest1.c <<\EOF
589 extern int glibc_conftest_frobozz;
590 main () { printf ("%d\n", glibc_conftest_frobozz); }
592 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
593 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
594 libc_cv_asm_set_directive=yes
596 libc_cv_asm_set_directive=no
599 if test $libc_cv_asm_set_directive = yes; then
600 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
603 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
604 [cat > conftest.s <<EOF
607 .symver _sym,sym@VERS
609 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
610 libc_cv_asm_symver_directive=yes
612 libc_cv_asm_symver_directive=no
615 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
616 if test $libc_cv_asm_symver_directive = yes; then
617 cat > conftest.s <<EOF
620 .symver _sym,sym@VERS
622 cat > conftest.map <<EOF
631 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
632 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
633 -nostartfiles -nostdlib
634 -Wl,--version-script,conftest.map
637 libc_cv_ld_version_script_option=yes
639 libc_cv_ld_version_script_option=no
642 libc_cv_ld_version_script_option=no
645 libc_cv_ld_version_script_option=no
648 if test $libc_cv_asm_symver_directive = yes &&
649 test $libc_cv_ld_version_script_option = yes &&
650 test $enable_versioning = yes; then
652 AC_DEFINE(DO_VERSIONING)
658 if test $VERSIONING = no; then
660 *** WARNING: You should not compile GNU libc without versioning. Not using
661 *** versioning will introduce incompatibilities so that old binaries
662 *** will not run anymore.
663 *** For versioning you need recent binutils (binutils-2.8.1.0.17 or newer)."
665 if test $elf = yes; then
666 AC_CACHE_CHECK(for .previous assembler directive,
667 libc_cv_asm_previous_directive, [dnl
668 cat > conftest.s <<EOF
672 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
673 libc_cv_asm_previous_directive=yes
675 libc_cv_asm_previous_directive=no
678 if test $libc_cv_asm_previous_directive = yes; then
679 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
681 AC_CACHE_CHECK(for .popsection assembler directive,
682 libc_cv_asm_popsection_directive, [dnl
683 cat > conftest.s <<EOF
684 .pushsection foo_section
687 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
688 libc_cv_asm_popsection_directive=yes
690 libc_cv_asm_popsection_directive=no
693 if test $libc_cv_asm_popsection_directive = yes; then
694 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
699 if test $elf != yes; then
700 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
701 [AC_TRY_COMPILE(, [asm (".section .init");
702 asm (".section .fini");
704 libc_cv_have_initfini=yes,
705 libc_cv_have_initfini=no)])
706 AC_SUBST(libc_cv_have_initfini)dnl
707 if test $libc_cv_have_initfini = yes; then
708 AC_DEFINE(HAVE_INITFINI)
712 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
713 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
714 [cat > conftest.$ac_ext <<EOF
715 dnl This sometimes fails to find confdefs.h, for some reason.
716 dnl [#]line __oline__ "[$]0"
717 [#]line __oline__ "configure"
718 #include "confdefs.h"
719 void underscore_test(void) {
722 if AC_TRY_EVAL(ac_compile); then
723 if grep _underscore_test conftest* >/dev/null; then
724 ifelse([$1], , :, [rm -f conftest*
727 ifelse([$2], , , [rm -f conftest*
731 echo "configure: failed program was:" >&AC_FD_CC
732 cat conftest.$ac_ext >&AC_FD_CC
733 ifelse([$2], , , [rm -f conftest*
738 if test $elf = yes; then
739 libc_cv_asm_underscores=no
741 if test $ac_cv_prog_cc_works = yes; then
742 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
743 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
744 libc_cv_asm_underscores=yes,
745 libc_cv_asm_underscores=no)])
747 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
748 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
749 libc_cv_asm_underscores=no)])
752 if test $libc_cv_asm_underscores = no; then
753 AC_DEFINE(NO_UNDERSCORES)
756 if test $elf = yes; then
757 libc_cv_weak_symbols=yes
758 libc_cv_asm_weak_directive=yes
759 libc_cv_asm_weakext_directive=no
761 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
763 cat > conftest.s <<EOF
765 ${libc_cv_asm_global_directive} foo
770 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
771 libc_cv_asm_weak_directive=yes
773 libc_cv_asm_weak_directive=no
777 if test $libc_cv_asm_weak_directive = no; then
778 AC_CACHE_CHECK(for assembler .weakext directive,
779 libc_cv_asm_weakext_directive,
781 cat > conftest.s <<EOF
783 ${libc_cv_asm_global_directive} foo
788 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
789 libc_cv_asm_weakext_directive=yes
791 libc_cv_asm_weakext_directive=no
798 if test $libc_cv_asm_weak_directive = yes; then
799 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
800 elif test $libc_cv_asm_weakext_directive = yes; then
801 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
804 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
805 cat > conftest.c <<\EOF
810 dnl No \ in command here because it ends up inside ''.
811 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
812 -nostdlib -nostartfiles -Wl,--no-whole-archive
813 -o conftest conftest.c 1>&AC_FD_CC]); then
814 libc_cv_ld_no_whole_archive=yes
816 libc_cv_ld_no_whole_archive=no
819 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
821 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
822 cat > conftest.c <<\EOF
827 dnl No \ in command here because it ends up inside ''.
828 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
829 -nostdlib -nostartfiles -fno-exceptions
830 -o conftest conftest.c 1>&AC_FD_CC]); then
831 libc_cv_gcc_no_exceptions=yes
833 libc_cv_gcc_no_exceptions=no
836 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
838 if test "$base_machine" = alpha ; then
839 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
840 cat > conftest.c <<\EOF
844 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
846 libc_cv_gcc_alpha_ng_prefix=yes
848 libc_cv_gcc_alpha_ng_prefix=no
851 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
852 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
854 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
858 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
859 [cat > conftest.c <<EOF
860 #line __oline__ "configure"
861 static char __EH_FRAME_BEGIN__[];
864 #ifdef CHECK__register_frame
865 __register_frame (__EH_FRAME_BEGIN__);
866 __deregister_frame (__EH_FRAME_BEGIN__);
868 #ifdef CHECK__register_frame_info
869 __register_frame_info (__EH_FRAME_BEGIN__);
870 __deregister_frame_info (__EH_FRAME_BEGIN__);
875 /* FIXME: this is fragile. */
885 dnl No \ in command here because it ends up inside ''.
886 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
887 -nostdlib -nostartfiles
888 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
889 libc_cv_gcc_dwarf2_unwind_info=static
891 libc_cv_gcc_dwarf2_unwind_info=no
893 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
894 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
895 -nostdlib -nostartfiles
896 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
897 libc_cv_gcc_dwarf2_unwind_info=yes
899 libc_cv_gcc_dwarf2_unwind_info=no
903 case $libc_cv_gcc_dwarf2_unwind_info in
905 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
908 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
909 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
913 ### End of automated tests.
914 ### Now run sysdeps configure fragments.
916 # sysdeps configure fragments may set these with files to be linked below.
920 # Iterate over all the sysdep directories we will use, running their
921 # configure fragments, and looking for a uname implementation.
923 for dir in $sysnames; do
926 *) dest=$srcdir/$dir ;;
928 if test -r $dest/configure; then
929 AC_MSG_RESULT(running configure fragment for $dest)
933 if test -z "$uname"; then
934 if test -r $dest/uname.c ||
935 test -r $dest/uname.S ||
936 { test -r $dest/syscalls.list &&
937 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
944 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
946 # If we will use the generic uname implementation, we must figure out what
947 # it will say by examining the system, and write the results in config-name.h.
948 if test "$uname" = "sysdeps/generic"; then
951 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
953 if test $uname_sysname != $config_os; then
954 config_release=`echo $config_os | sed s/$uname_sysname//`
957 AC_DEFUN(LIBC_KERNEL_ID, [dnl
958 if test -r /vmunix; then
959 kernel_id=`strings /vmunix | grep UNIX`
960 elif test -r /dynix; then
961 kernel_id=`strings /dynix | grep DYNIX`
967 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
968 AC_REQUIRE([LIBC_KERNEL_ID])dnl
970 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
972 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
973 != x$config_release; then
974 # The configuration release is a substring of the kernel release.
975 libc_cv_uname_release=$kernel_release
976 elif test x$config_release != x; then
977 libc_cv_uname_release=$config_release
978 elif test x$kernel_release != x; then
979 libc_cv_uname_release=$kernel_release
981 libc_cv_uname_release=unknown
983 uname_release="$libc_cv_uname_release"
985 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
986 AC_REQUIRE([LIBC_KERNEL_ID])dnl
988 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
990 if test -n "$kernel_version"; then
991 libc_cv_uname_version="$kernel_version"
993 libc_cv_uname_version=unknown
995 uname_version="$libc_cv_uname_version"
997 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
998 config_uname=config-name.h:config-name.in
1000 # For non-generic uname, we don't need to create config-name.h at all.
1004 AC_MSG_CHECKING(stdio selection)
1007 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1008 default) stdio=stdio ;;
1010 AC_MSG_RESULT($stdio)
1012 AC_MSG_CHECKING(ldap selection)
1021 AC_MSG_RESULT($ldap)
1023 AC_SUBST(libc_cv_slibdir)
1024 AC_SUBST(libc_cv_sysconfdir)
1025 AC_SUBST(libc_cv_rootsbindir)
1027 AC_SUBST(has_ldconfig)
1029 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1030 if test $gnu_ld = yes; then
1031 AC_DEFINE(HAVE_GNU_LD)
1033 if test $gnu_as = yes; then
1034 AC_DEFINE(HAVE_GNU_AS)
1036 if test $elf = yes; then
1042 if test $shared = default; then
1043 if test $gnu_ld = yes; then
1046 # For now we do not assume shared libs are available. In future more
1047 # tests might become available.
1052 dnl We must not allow compilation without static library on some platforms.
1053 if test $static = no && test $shared = yes; then
1057 *** You must compile with support for the static library since the shared
1058 *** library uses it. Restart configure without \`--disable-static'.])
1065 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1067 cat > conftest.c <<EOF
1068 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1069 # error PIC is default.
1072 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1076 AC_SUBST(pic_default)
1081 AC_SUBST(static_nss)
1082 AC_SUBST(nopic_initfini)
1086 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1089 config_makefile=Makefile
1092 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
1095 if test $libc_cv_gcc_pipe_bug = yes; then
1100 AC_OUTPUT_COMMANDS([
1101 if test "$realCC"; then
1102 sed -e 's/%{pipe:-}/%|/g' `$realCC -print-file-name=specs` >specsT
1104 fi], [realCC=$realCC])
1106 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1107 [echo '$config_vars' >> config.make; test -d bits || mkdir bits])