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=$withval, path_binutils='')
43 --with-elf if using the ELF object format,
46 [ --without-cvs if CVS should not be used],
47 with_cvs=$withval, with_cvs=yes)
50 AC_ARG_ENABLE(libio, dnl
51 [ --enable-libio build in GNU libio instead of GNU stdio],
52 [if test $enableval = yes; then
59 AC_ARG_ENABLE(sanity-checks, dnl
60 [ --disable-sanity-checks really do not use threads (should not be used
61 except in special situations) [default=yes]],
62 enable_sanity=$enableval, enable_sanity=yes)
64 dnl Arguments to enable or disable building the static, shared, profiled,
65 dnl and -fomit-frame-pointer libraries.
66 AC_ARG_ENABLE(static, dnl
67 [ --enable-static build static library [default=yes]],
68 static=$enableval, static=yes)
69 AC_ARG_ENABLE(shared, dnl
70 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
71 shared=$enableval, shared=default)
72 AC_ARG_ENABLE(profile, dnl
73 [ --enable-profile build profiled library [default=yes]],
74 profile=$enableval, profile=yes)
75 AC_ARG_ENABLE(omitfp, dnl
76 [ --enable-omitfp build undebuggable optimized library [default=no]],
77 omitfp=$enableval, omitfp=no)
78 AC_ARG_ENABLE(bounded, dnl
79 [ --enable-bounded build with runtime bounds checking [default=no]],
80 bounded=$enableval, bounded=no)
81 AC_ARG_ENABLE(versioning, dnl
82 [ --disable-versioning do not include versioning information in the
83 library objects [default=yes if supported]],
84 enable_versioning=$enableval, enable_versioning=yes)
86 dnl Generic infrastructure for drop-in additions to libc.
87 AC_ARG_ENABLE(add-ons, dnl
88 [ --enable-add-ons[=DIR1,DIR2]... configure and build add-ons in DIR1,DIR2,...
89 search for add-ons if no parameter given],
91 yes) if test "$srcdir" = "."; then
92 add_ons=`echo */configure | sed -e 's!/configure!!g'`
94 add_ons=`echo $srcdir/*/configure | \
95 sed -e 's!/configure!!g' -e "s!$srcdir/!!g"`
97 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
101 AC_CONFIG_SUBDIRS($add_ons)
103 if test x"$add_ons" != x; then
104 for f in $add_ons; do
105 # Test whether such a subdir really exists.
106 if test -d $srcdir/$f; then
107 add_ons_pfx="$add_ons_pfx $f/"
109 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
114 dnl On some platforms we cannot use dynamic loading. We must provide
115 dnl static NSS modules.
116 AC_ARG_ENABLE(static-nss, dnl
117 [ --enable-static-nss build static NSS modules [default=no]],
118 static_nss=$enableval, static_nss=no)
119 if test x"$static_nss" = xyes; then
120 AC_DEFINE(DO_STATIC_NSS)
125 # The way shlib-versions is used to generate soversions.mk uses a
126 # fairly simplistic model for name recognition that can't distinguish
127 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
128 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
129 # tell. This doesn't get used much beyond that, so it's fairly safe.
134 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
139 ### I put this here to prevent those annoying emails from people who cannot
140 ### read and try to compile glibc on unsupported platforms. --drepper
142 ### By using the undocumented --enable-hacker-mode option for configure
143 ### one can skip this test to make the configuration not fail for unsupported
146 if test -z "$enable_hacker_mode"; then
147 case "$machine-$host_os" in
148 *-linux* | *-gnu* | arm*-none*)
151 echo "*** The GNU C library is currently not available for this platform."
152 echo "*** So far nobody cared to port it and if there is no volunteer it"
153 echo "*** might never happen. So, if you have interest to see glibc on"
154 echo "*** this platform visit"
155 echo "*** http://www.gnu.org/software/libc/porting.html"
156 echo "*** and join the group of porters"
162 # We keep the original values in `$config_*' and never modify them, so we
163 # can write them unchanged into config.make. Everything else uses
164 # $machine, $vendor, and $os, and changes them whenever convenient.
165 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
167 # Some configurations imply other options.
169 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
170 # These systems always use GNU tools.
171 gnu_ld=yes gnu_as=yes ;;
174 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
175 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
177 gnu* | linux* | sysv4* | solaris2*)
178 # These systems (almost) always use the ELF format.
183 machine=$config_machine
184 vendor=$config_vendor
187 dnl We need to use [ and ] for other purposes for a while now.
189 # Expand the configuration machine name into a subdirectory by architecture
190 # type and particular chip.
192 a29k | am29000) base_machine=a29k machine=a29k ;;
193 alpha*) base_machine=alpha machine=alpha/$machine ;;
194 arm*) base_machine=arm machine=arm/$machine ;;
195 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
196 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
197 hppa*) base_machine=hppa machine=hppa/$machine ;;
198 i[3456]86) base_machine=i386 machine=i386/$machine ;;
199 m680?0) base_machine=m68k machine=m68k/$machine ;;
200 m68k) base_machine=m68k machine=m68k/m68020 ;;
201 m88???) base_machine=m88k machine=m88k/$machine ;;
202 m88k) base_machine=m88k machine=m88k/m88100 ;;
203 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
204 mips*) base_machine=mips machine=mips/$machine ;;
206 base_machine=sparc machine=sparc/sparc32 ;;
207 sparcv8 | supersparc | hypersparc)
208 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
209 sparc64 | ultrasparc)
210 base_machine=sparc machine=sparc/sparc64 ;;
213 AC_SUBST(base_machine)
215 if test "$base_machine" = "i386"; then
216 AC_DEFINE(USE_REGPARMS)
219 # Compute the list of sysdep directories for this configuration.
220 # This can take a while to compute.
221 sysdep_dir=$srcdir/sysdeps
222 AC_MSG_CHECKING(sysdep dirs)
223 dnl We need to use [ and ] for other purposes for a while now.
225 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
226 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
231 netbsd* | 386bsd* | freebsd* | bsdi*)
232 base_os=unix/bsd/bsd4.4 ;;
233 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
235 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
238 base_os=unix/sysv/sysv4 ;;
240 base_os=standalone ;;
245 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
248 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
252 o=`echo $tail | sed 's/[0-9]*$//'`
253 if test $o != $tail; then
256 # For linux-gnu, try linux-gnu, then linux.
257 o=`echo $tail | sed 's/-.*$//'`
258 if test $o != $tail; then
262 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
265 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
271 # For sparc/sparc9, try sparc/sparc9 and then sparc.
274 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
276 # Prepend the machine's FPU directory unless --without-fp.
277 if test "$with_fp" = yes; then
284 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
287 # Find what sysdep directories exist.
289 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
290 for d in $add_ons_pfx ''; do
291 for b in $base ''; do
292 for m0 in $mach ''; do
293 for v in /$vendor ''; do
294 test "$v" = / && continue
295 for o in /$ostry ''; do
296 test "$o" = / && continue
297 for m in $mach ''; do
298 if test "$m0$b$v$o$m"; then
299 try="${d}sysdeps$m0$b$v$o$m"
300 test -n "$enable_debug_configure" &&
301 echo "$0 [DEBUG]: try $try" >&2
304 *) dest=$srcdir/$try ;;
306 if test -d $dest; then
307 sysnames="$sysnames $try"
308 { test -n "$o" || test -n "$b"; } && os_used=t
309 { test -n "$m" || test -n "$m0"; } && machine_used=t
320 if test -z "$os_used" && test "$os" != none; then
321 AC_MSG_ERROR(Operating system $os is not supported.)
323 if test -z "$machine_used" && test "$machine" != none; then
324 AC_MSG_ERROR(The $machine is not supported.)
327 # We have now validated the configuration.
330 # If using ELF, look for an `elf' subdirectory of each machine directory.
331 # We prepend these rather than inserting them whereever the machine appears
332 # because things specified by the machine's ELF ABI should override
333 # OS-specific things, and should always be the same for any OS on the
334 # machine (otherwise what's the point of an ABI?).
335 if test "$elf" = yes; then
337 for d in $add_ons_pfx ''; do
340 *) xsrcdir=$srcdir/ ;;
343 if test -d $xsrcdir${d}sysdeps$m/elf; then
344 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
348 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
352 # Expand the list of system names into a full list of directories
353 # from each element's parent name and Implies file (if present).
356 while test $# -gt 0; do
360 case " $names " in *" $name "*)
361 # Already in the list.
365 # Report each name as we discover it, so there is no long pause in output.
366 echo $ac_n "$name $ac_c" >&AC_FD_MSG
368 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
372 *) xsrcdir=$srcdir/ ;;
374 test -n "$enable_debug_configure" &&
375 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
377 if test -f $xsrcdir$name/Implies; then
378 # Collect more names from the `Implies' file (removing comments).
379 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
381 for x in $implied_candidate; do
382 if test -d $xsrcdir$name_base/$x; then
383 implied="$implied $name_base/$x";
385 AC_MSG_WARN($name/Implies specifies nonexistent $x)
392 # Add NAME to the list of names.
395 # Find the parent of NAME, using the empty string if it has none.
397 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
400 # Add the names implied by NAME, and NAME's parent (if it has one), to
401 # the list of names to be processed (the argument list). We prepend the
402 # implied names to the list and append the parent. We want implied
403 # directories to come before further directories inferred from the
404 # configuration components; this ensures that for sysv4, unix/common
405 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
407 sysnames="`echo $implied $* $parent`"
408 test -n "$sysnames" && set $sysnames
411 # Add the default directories.
412 sysnames="$names sysdeps/generic"
414 # The other names were emitted during the scan.
415 AC_MSG_RESULT(sysdeps/generic)
421 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
422 # The makefiles need to use a different form to find it in $srcdir.
423 INSTALL='\$(..)./install-sh -c'
426 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
427 if test "$MSGFMT" != ":"; then
428 changequote(,)dnl Need [] for regexps.
429 if $MSGFMT --version 2>&1 | grep 'GNU gettext.*0\.[1-9][0-9]' >/dev/null 2>&1
431 then : # msgfmt from gettext 0.10 or greater, works.
434 *** (g)msgfmt is too old or wrong version (need gettext 0.10 or better).])
439 AC_CHECK_PROG(MAKEINFO, makeinfo, makeinfo)
440 if test "$MAKEINFO"; then
441 changequote(,)dnl Need [] for regexps.
442 if $MAKEINFO --version | grep 'texinfo 3\.[1-9][1-9]' >/dev/null 2>&1
444 then : # Makeinfo 3.11 or greater, works.
447 *** makeinfo is too old (need version 3.11 or better).
448 *** You should install the needed version and re-configure since otherwise
449 *** you won't get the info pages installed.])
456 if test $host != $build; then
457 AC_CHECK_PROGS(BUILD_CC, gcc cc)
459 AC_SUBST(cross_compiling)
462 AC_CHECK_TOOL(AR, ar)
463 AC_CHECK_TOOL(RANLIB, ranlib, :)
465 AC_PATH_PROG(BASH, bash, no)
466 if test "$BASH" != no &&
467 $BASH -c 'test "$BASH_VERSINFO" \
468 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
469 libc_cv_have_bash2=yes
471 libc_cv_have_bash2=no
473 AC_SUBST(libc_cv_have_bash2)
475 dnl We need a ksh compatible shell for tzselect.
476 if test "$BASH" = no; then
477 AC_PATH_PROG(KSH, ksh, no)
478 if test "$KSH" = no; then
488 AC_SUBST(libc_cv_have_ksh)
490 AC_PATH_PROGS(PERL, perl, no)
493 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
494 echo '#include <stddef.h>
495 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
496 if eval "$ac_cpp conftest.c 2>/dev/null" \
497 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
498 libc_cv_signed_size_t=no
500 libc_cv_signed_size_t=yes
503 if test $libc_cv_signed_size_t = yes; then
504 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
505 cat >> confdefs.h <<\EOF
507 #define __SIZE_TYPE__ unsigned
511 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
513 [#define __need_size_t
514 #define __need_wchar_t
517 #include <stddef.h>], [size_t size; wchar_t wchar;
519 #error stddef.h ignored __need_*
521 if (&size == NULL || &wchar == NULL) abort ();],
522 libc_cv_friendly_stddef=yes,
523 libc_cv_friendly_stddef=no)])
524 if test $libc_cv_friendly_stddef = yes; then
525 config_vars="$config_vars
526 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
529 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
530 libc_cv_need_minus_P, [dnl
531 cat > conftest.S <<EOF
532 #include "confdefs.h"
533 /* Nothing whatsoever. */
535 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
536 libc_cv_need_minus_P=no
538 libc_cv_need_minus_P=yes
541 if test $libc_cv_need_minus_P = yes; then
542 config_vars="$config_vars
543 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
546 # gcc 2.7.x has a bug where if -pipe is set, the assembler will always
547 # be told to read stdin. This causes the compiler to hang when fed an
549 if test $ac_cv_prog_gcc = yes; then
550 case `${CC-cc} -v 2>&1` in
552 # We must check this even if -pipe is not given here, because the user
553 # might do `make CFLAGS=-pipe'.
554 AC_CACHE_CHECK(for gcc 2.7.x -pipe bug, libc_cv_gcc_pipe_bug, [dnl
555 cp /dev/null conftest.s
556 cat >conftest1.s <<EOF
559 if ${CC-cc} -pipe -c conftest.s <conftest1.s 2>/dev/null; then
560 libc_cv_gcc_pipe_bug=no
562 libc_cv_gcc_pipe_bug=yes
565 if test $libc_cv_gcc_pipe_bug = yes; then
566 makeCC="${CC-cc} -B\$(common-objpfx)"
568 CFLAGS=`echo $CFLAGS |sed 's/-pipe//'`
570 *) libc_cv_gcc_pipe_bug=no;;
573 libc_cv_gcc_pipe_bug=no
576 AC_CACHE_CHECK(for assembler global-symbol directive,
577 libc_cv_asm_global_directive, [dnl
578 libc_cv_asm_global_directive=UNKNOWN
579 for ac_globl in .globl .global; do
580 cat > conftest.s <<EOF
585 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
586 libc_cv_asm_global_directive=${ac_globl}
589 test $libc_cv_asm_global_directive != UNKNOWN && break
591 if test $libc_cv_asm_global_directive = UNKNOWN; then
592 AC_MSG_ERROR(cannot determine asm global directive)
594 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
597 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
598 cat > conftest.s <<EOF
601 .set glibc_conftest_frobozz,foo
602 $libc_cv_asm_global_directive glibc_conftest_frobozz
604 # The alpha-dec-osf1 assembler gives only a warning for `.set'
605 # (but it doesn't work), so we must do a linking check to be sure.
606 cat > conftest1.c <<\EOF
607 extern int glibc_conftest_frobozz;
608 main () { printf ("%d\n", glibc_conftest_frobozz); }
610 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
611 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
612 libc_cv_asm_set_directive=yes
614 libc_cv_asm_set_directive=no
617 if test $libc_cv_asm_set_directive = yes; then
618 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
621 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
622 [cat > conftest.s <<EOF
625 .symver _sym,sym@VERS
627 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
628 libc_cv_asm_symver_directive=yes
630 libc_cv_asm_symver_directive=no
633 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
634 if test $libc_cv_asm_symver_directive = yes; then
635 cat > conftest.s <<EOF
638 .symver _sym,sym@VERS
640 cat > conftest.map <<EOF
649 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
650 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
651 -nostartfiles -nostdlib
652 -Wl,--version-script,conftest.map
655 libc_cv_ld_version_script_option=yes
657 libc_cv_ld_version_script_option=no
660 libc_cv_ld_version_script_option=no
663 libc_cv_ld_version_script_option=no
666 if test $libc_cv_asm_symver_directive = yes &&
667 test $libc_cv_ld_version_script_option = yes &&
668 test $enable_versioning = yes; then
670 AC_DEFINE(DO_VERSIONING)
676 if test $VERSIONING = no; then
678 *** WARNING: You should not compile GNU libc without versioning. Not using
679 *** versioning will introduce incompatibilities so that old binaries
680 *** will not run anymore.
681 *** For versioning you need recent binutils (binutils-2.8.1.0.17 or newer)."
683 if test $elf = yes; then
684 AC_CACHE_CHECK(for .previous assembler directive,
685 libc_cv_asm_previous_directive, [dnl
686 cat > conftest.s <<EOF
690 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
691 libc_cv_asm_previous_directive=yes
693 libc_cv_asm_previous_directive=no
696 if test $libc_cv_asm_previous_directive = yes; then
697 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
699 AC_CACHE_CHECK(for .popsection assembler directive,
700 libc_cv_asm_popsection_directive, [dnl
701 cat > conftest.s <<EOF
702 .pushsection foo_section
705 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
706 libc_cv_asm_popsection_directive=yes
708 libc_cv_asm_popsection_directive=no
711 if test $libc_cv_asm_popsection_directive = yes; then
712 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
717 if test $elf != yes; then
718 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
719 [AC_TRY_COMPILE(, [asm (".section .init");
720 asm (".section .fini");
722 libc_cv_have_initfini=yes,
723 libc_cv_have_initfini=no)])
724 AC_SUBST(libc_cv_have_initfini)dnl
725 if test $libc_cv_have_initfini = yes; then
726 AC_DEFINE(HAVE_INITFINI)
730 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
731 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
732 [cat > conftest.$ac_ext <<EOF
733 dnl This sometimes fails to find confdefs.h, for some reason.
734 dnl [#]line __oline__ "[$]0"
735 [#]line __oline__ "configure"
736 #include "confdefs.h"
737 void underscore_test(void) {
740 if AC_TRY_EVAL(ac_compile); then
741 if grep _underscore_test conftest* >/dev/null; then
742 ifelse([$1], , :, [rm -f conftest*
745 ifelse([$2], , , [rm -f conftest*
749 echo "configure: failed program was:" >&AC_FD_CC
750 cat conftest.$ac_ext >&AC_FD_CC
751 ifelse([$2], , , [rm -f conftest*
756 if test $elf = yes; then
757 libc_cv_asm_underscores=no
759 if test $ac_cv_prog_cc_works = yes; then
760 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
761 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
762 libc_cv_asm_underscores=yes,
763 libc_cv_asm_underscores=no)])
765 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
766 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
767 libc_cv_asm_underscores=no)])
770 if test $libc_cv_asm_underscores = no; then
771 AC_DEFINE(NO_UNDERSCORES)
774 if test $elf = yes; then
775 libc_cv_weak_symbols=yes
776 libc_cv_asm_weak_directive=yes
777 libc_cv_asm_weakext_directive=no
779 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_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_weak_directive=yes
791 libc_cv_asm_weak_directive=no
795 if test $libc_cv_asm_weak_directive = no; then
796 AC_CACHE_CHECK(for assembler .weakext directive,
797 libc_cv_asm_weakext_directive,
799 cat > conftest.s <<EOF
801 ${libc_cv_asm_global_directive} foo
806 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
807 libc_cv_asm_weakext_directive=yes
809 libc_cv_asm_weakext_directive=no
816 if test $libc_cv_asm_weak_directive = yes; then
817 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
818 elif test $libc_cv_asm_weakext_directive = yes; then
819 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
822 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
823 cat > conftest.c <<\EOF
828 dnl No \ in command here because it ends up inside ''.
829 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
830 -nostdlib -nostartfiles -Wl,--no-whole-archive
831 -o conftest conftest.c 1>&AC_FD_CC]); then
832 libc_cv_ld_no_whole_archive=yes
834 libc_cv_ld_no_whole_archive=no
837 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
839 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
840 cat > conftest.c <<\EOF
845 dnl No \ in command here because it ends up inside ''.
846 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
847 -nostdlib -nostartfiles -fno-exceptions
848 -o conftest conftest.c 1>&AC_FD_CC]); then
849 libc_cv_gcc_no_exceptions=yes
851 libc_cv_gcc_no_exceptions=no
854 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
856 if test "$base_machine" = alpha ; then
857 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
858 cat > conftest.c <<\EOF
862 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
864 libc_cv_gcc_alpha_ng_prefix=yes
866 libc_cv_gcc_alpha_ng_prefix=no
869 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
870 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
872 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
876 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
877 [cat > conftest.c <<EOF
878 #line __oline__ "configure"
879 static char __EH_FRAME_BEGIN__[];
882 #ifdef CHECK__register_frame
883 __register_frame (__EH_FRAME_BEGIN__);
884 __deregister_frame (__EH_FRAME_BEGIN__);
886 #ifdef CHECK__register_frame_info
887 __register_frame_info (__EH_FRAME_BEGIN__);
888 __deregister_frame_info (__EH_FRAME_BEGIN__);
893 /* FIXME: this is fragile. */
903 dnl No \ in command here because it ends up inside ''.
904 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
905 -nostdlib -nostartfiles
906 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
907 libc_cv_gcc_dwarf2_unwind_info=static
909 libc_cv_gcc_dwarf2_unwind_info=no
911 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
912 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
913 -nostdlib -nostartfiles
914 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
915 libc_cv_gcc_dwarf2_unwind_info=yes
917 libc_cv_gcc_dwarf2_unwind_info=no
921 case $libc_cv_gcc_dwarf2_unwind_info in
923 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
926 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
927 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
931 ### End of automated tests.
932 ### Now run sysdeps configure fragments.
934 # sysdeps configure fragments may set these with files to be linked below.
938 # Iterate over all the sysdep directories we will use, running their
939 # configure fragments, and looking for a uname implementation.
941 for dir in $sysnames; do
944 *) dest=$srcdir/$dir ;;
946 if test -r $dest/configure; then
947 AC_MSG_RESULT(running configure fragment for $dest)
951 if test -z "$uname"; then
952 if test -r $dest/uname.c ||
953 test -r $dest/uname.S ||
954 { test -r $dest/syscalls.list &&
955 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
962 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
964 # If we will use the generic uname implementation, we must figure out what
965 # it will say by examining the system, and write the results in config-name.h.
966 if test "$uname" = "sysdeps/generic"; then
969 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
971 if test $uname_sysname != $config_os; then
972 config_release=`echo $config_os | sed s/$uname_sysname//`
975 AC_DEFUN(LIBC_KERNEL_ID, [dnl
976 if test -r /vmunix; then
977 kernel_id=`strings /vmunix | grep UNIX`
978 elif test -r /dynix; then
979 kernel_id=`strings /dynix | grep DYNIX`
985 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
986 AC_REQUIRE([LIBC_KERNEL_ID])dnl
988 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
990 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
991 != x$config_release; then
992 # The configuration release is a substring of the kernel release.
993 libc_cv_uname_release=$kernel_release
994 elif test x$config_release != x; then
995 libc_cv_uname_release=$config_release
996 elif test x$kernel_release != x; then
997 libc_cv_uname_release=$kernel_release
999 libc_cv_uname_release=unknown
1001 uname_release="$libc_cv_uname_release"
1003 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1004 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1006 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1008 if test -n "$kernel_version"; then
1009 libc_cv_uname_version="$kernel_version"
1011 libc_cv_uname_version=unknown
1013 uname_version="$libc_cv_uname_version"
1015 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1016 config_uname=config-name.h:config-name.in
1018 # For non-generic uname, we don't need to create config-name.h at all.
1022 AC_MSG_CHECKING(stdio selection)
1025 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1026 default) stdio=stdio ;;
1028 AC_MSG_RESULT($stdio)
1030 AC_MSG_CHECKING(ldap selection)
1039 AC_MSG_RESULT($ldap)
1041 AC_SUBST(libc_cv_slibdir)
1042 AC_SUBST(libc_cv_sysconfdir)
1043 AC_SUBST(libc_cv_rootsbindir)
1045 AC_SUBST(has_ldconfig)
1047 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1048 if test $gnu_ld = yes; then
1049 AC_DEFINE(HAVE_GNU_LD)
1051 if test $gnu_as = yes; then
1052 AC_DEFINE(HAVE_GNU_AS)
1054 if test $elf = yes; then
1060 if test $shared = default; then
1061 if test $gnu_ld = yes; then
1064 # For now we do not assume shared libs are available. In future more
1065 # tests might become available.
1070 dnl We must not allow compilation without static library on some platforms.
1071 if test $static = no && test $shared = yes; then
1075 *** You must compile with support for the static library since the shared
1076 *** library uses it. Restart configure without \`--disable-static'.])
1083 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1085 cat > conftest.c <<EOF
1086 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1087 # error PIC is default.
1090 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1094 AC_SUBST(pic_default)
1099 AC_SUBST(static_nss)
1100 AC_SUBST(nopic_initfini)
1104 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1107 config_makefile=Makefile
1110 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
1113 if test $libc_cv_gcc_pipe_bug = yes; then
1118 AC_OUTPUT_COMMANDS([
1119 if test "$realCC"; then
1120 sed -e 's/%{pipe:-}/%|/g' `$realCC -print-file-name=specs` >specsT
1122 fi], [realCC=$realCC])
1124 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1125 [echo '$config_vars' >> config.make; test -d bits || mkdir bits])