1 dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.13)dnl dnl Minimum Autoconf version required.
4 AC_INIT(include/features.h)
5 AC_CONFIG_HEADER(config.h)
6 AC_CONFIG_AUX_DIR(scripts)
8 # This will get text that should go into config.make.
11 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
13 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
16 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
18 *) config_vars="$config_vars
19 gmp-srcdir = $withval" ;;
22 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
23 AC_ARG_WITH(gettext, dnl
24 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
26 case "$with_gettext" in
28 AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
31 config_vars="$config_vars
32 gettext-srcdir = $withval" ;;
36 dnl Arguments to specify presence of other packages/features.
38 [ --with-fp if using floating-point hardware [default=yes]],
39 with_fp=$withval, with_fp=yes)
40 AC_ARG_WITH(binutils, dnl
41 --with-binutils=PATH specify location of binutils (as and ld),
42 path_binutils=$withval, path_binutils='')
44 --with-elf if using the ELF object format,
47 [ --without-cvs if CVS should not be used],
48 with_cvs=$withval, with_cvs=yes)
51 AC_ARG_WITH(headers, dnl
52 [ --with-headers=PATH location of system headers to use
53 [e.g. /usr/src/linux/include]
54 [default=compiler default]],
55 sysheaders=$withval, sysheaders='')
57 AC_ARG_ENABLE(libio, dnl
58 [ --enable-libio build in GNU libio instead of GNU stdio],
59 [if test $enableval = yes; then
66 AC_ARG_ENABLE(sanity-checks, dnl
67 [ --disable-sanity-checks really do not use threads (should not be used
68 except in special situations) [default=yes]],
69 enable_sanity=$enableval, enable_sanity=yes)
71 dnl Arguments to enable or disable building the static, shared, profiled,
72 dnl and -fomit-frame-pointer libraries.
73 dnl I've disabled this for now since we cannot build glibc without static
74 dnl libraries built in the moment.
75 dnl AC_ARG_ENABLE(static, dnl
76 dnl [ --enable-static build static library [default=yes]],
77 dnl static=$enableval, static=yes)
79 AC_ARG_ENABLE(shared, dnl
80 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
81 shared=$enableval, shared=default)
82 AC_ARG_ENABLE(profile, dnl
83 [ --enable-profile build profiled library [default=yes]],
84 profile=$enableval, profile=yes)
85 AC_ARG_ENABLE(omitfp, dnl
86 [ --enable-omitfp build undebuggable optimized library [default=no]],
87 omitfp=$enableval, omitfp=no)
88 AC_ARG_ENABLE(bounded, dnl
89 [ --enable-bounded build with runtime bounds checking [default=no]],
90 bounded=$enableval, bounded=no)
91 AC_ARG_ENABLE(versioning, dnl
92 [ --disable-versioning do not include versioning information in the
93 library objects [default=yes if supported]],
94 enable_versioning=$enableval, enable_versioning=yes)
96 dnl Generic infrastructure for drop-in additions to libc.
97 AC_ARG_ENABLE(add-ons, dnl
98 [ --enable-add-ons[=DIR1,DIR2]...
99 configure and build add-ons in DIR1,DIR2,...
100 search for add-ons if no parameter given],
101 [case "$enableval" in
102 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
103 test "$add_ons" = "*" && add_ons= ;;
104 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
108 AC_CONFIG_SUBDIRS($add_ons)
110 if test x"$add_ons" != x; then
111 for f in $add_ons; do
112 # Test whether such a subdir really exists.
113 if test -d $srcdir/$f; then
114 add_ons_pfx="$add_ons_pfx $f/"
116 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
121 dnl On some platforms we cannot use dynamic loading. We must provide
122 dnl static NSS modules.
123 AC_ARG_ENABLE(static-nss, dnl
124 [ --enable-static-nss build static NSS modules [default=no]],
125 static_nss=$enableval, static_nss=no)
126 if test x"$static_nss" = xyes; then
127 AC_DEFINE(DO_STATIC_NSS)
130 AC_ARG_ENABLE(force-install,
131 [ --disable-force-install don't force installation of files from this package,
132 even if they are older than the installed files],
133 force_install=$enableval, force_install=yes)
134 AC_SUBST(force_install)
138 # The way shlib-versions is used to generate soversions.mk uses a
139 # fairly simplistic model for name recognition that can't distinguish
140 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
141 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
142 # tell. This doesn't get used much beyond that, so it's fairly safe.
147 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
151 # We keep the original values in `$config_*' and never modify them, so we
152 # can write them unchanged into config.make. Everything else uses
153 # $machine, $vendor, and $os, and changes them whenever convenient.
154 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
156 # Some configurations imply other options.
158 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
159 # These systems always use GNU tools.
160 gnu_ld=yes gnu_as=yes ;;
163 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
164 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
166 gnu* | linux* | sysv4* | solaris2* | irix6*)
167 # These systems (almost) always use the ELF format.
172 machine=$config_machine
173 vendor=$config_vendor
177 ### I put this here to prevent those annoying emails from people who cannot
178 ### read and try to compile glibc on unsupported platforms. --drepper
180 ### By using the undocumented --enable-hacker-mode option for configure
181 ### one can skip this test to make the configuration not fail for unsupported
184 if test -z "$enable_hacker_mode"; then
185 case "$machine-$host_os" in
186 *-linux* | *-gnu* | arm*-none*)
189 echo "*** The GNU C library is currently not available for this platform."
190 echo "*** So far nobody cared to port it and if there is no volunteer it"
191 echo "*** might never happen. So, if you have interest to see glibc on"
192 echo "*** this platform visit"
193 echo "*** http://www.gnu.org/software/libc/porting.html"
194 echo "*** and join the group of porters"
200 dnl We need to use [ and ] for other purposes for a while now.
202 # Expand the configuration machine name into a subdirectory by architecture
203 # type and particular chip.
205 a29k | am29000) base_machine=a29k machine=a29k ;;
206 alpha*) base_machine=alpha machine=alpha/$machine ;;
207 arm*) base_machine=arm machine=arm/$machine ;;
208 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
209 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
210 hppa*) base_machine=hppa machine=hppa/$machine ;;
211 i[3456]86) base_machine=i386 machine=i386/$machine ;;
212 m680?0) base_machine=m68k machine=m68k/$machine ;;
213 m68k) base_machine=m68k machine=m68k/m68020 ;;
214 m88???) base_machine=m88k machine=m88k/$machine ;;
215 m88k) base_machine=m88k machine=m88k/m88100 ;;
216 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
217 mips*) base_machine=mips
219 IP22) machine=mips/mips3 ;;
220 *) machine=mips/$machine ;;
223 base_machine=sparc machine=sparc/sparc32 ;;
224 sparcv8 | supersparc | hypersparc)
225 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
226 sparcv8plus | sparcv8plusa | sparcv9)
227 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
228 sparc64 | ultrasparc)
229 base_machine=sparc machine=sparc/sparc64 ;;
232 AC_SUBST(base_machine)
234 if test "$base_machine" = "i386"; then
235 AC_DEFINE(USE_REGPARMS)
238 # Compute the list of sysdep directories for this configuration.
239 # This can take a while to compute.
240 sysdep_dir=$srcdir/sysdeps
241 AC_MSG_CHECKING(sysdep dirs)
242 dnl We need to use [ and ] for other purposes for a while now.
244 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
245 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
250 netbsd* | 386bsd* | freebsd* | bsdi*)
251 base_os=unix/bsd/bsd4.4 ;;
252 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
254 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
257 base_os=unix/sysv/irix6/$os ;;
259 base_os=unix/sysv/sysv4 ;;
261 base_os=standalone ;;
266 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
269 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
273 o=`echo $tail | sed 's/[0-9]*$//'`
274 if test $o != $tail; then
277 # For linux-gnu, try linux-gnu, then linux.
278 o=`echo $tail | sed 's/-.*$//'`
279 if test $o != $tail; then
283 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
286 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
292 # For sparc/sparc32, try sparc/sparc32 and then sparc.
295 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
297 # Prepend the machine's FPU directory unless --without-fp.
298 if test "$with_fp" = yes; then
305 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
308 # Find what sysdep directories exist.
310 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
311 for d in $add_ons_pfx ''; do
312 for b in $base ''; do
313 for m0 in $mach ''; do
314 for v in /$vendor ''; do
315 test "$v" = / && continue
316 for o in /$ostry ''; do
317 test "$o" = / && continue
318 for m in $mach ''; do
319 if test "$m0$b$v$o$m"; then
320 try="${d}sysdeps$m0$b$v$o$m"
321 test -n "$enable_debug_configure" &&
322 echo "$0 [DEBUG]: try $try" >&2
323 if test -d $srcdir/$try; then
324 sysnames="$sysnames $try"
325 { test -n "$o" || test -n "$b"; } && os_used=t
326 { test -n "$m" || test -n "$m0"; } && machine_used=t
337 if test -z "$os_used" && test "$os" != none; then
338 AC_MSG_ERROR(Operating system $os is not supported.)
340 if test -z "$machine_used" && test "$machine" != none; then
341 AC_MSG_ERROR(The $machine is not supported.)
344 # We have now validated the configuration.
347 # If using ELF, look for an `elf' subdirectory of each machine directory.
348 # We prepend these rather than inserting them whereever the machine appears
349 # because things specified by the machine's ELF ABI should override
350 # OS-specific things, and should always be the same for any OS on the
351 # machine (otherwise what's the point of an ABI?).
352 if test "$elf" = yes; then
354 for d in $add_ons_pfx ''; do
356 if test -d $srcdir/${d}sysdeps$m/elf; then
357 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
361 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
365 # Expand the list of system names into a full list of directories
366 # from each element's parent name and Implies file (if present).
369 while test $# -gt 0; do
373 case " $names " in *" $name "*)
374 # Already in the list.
378 # Report each name as we discover it, so there is no long pause in output.
379 echo $ac_n "$name $ac_c" >&AC_FD_MSG
381 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
385 *) xsrcdir=$srcdir/ ;;
387 test -n "$enable_debug_configure" &&
388 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
390 if test -f $xsrcdir$name/Implies; then
391 # Collect more names from the `Implies' file (removing comments).
392 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
394 for x in $implied_candidate; do
395 if test -d $xsrcdir$name_base/$x; then
396 implied="$implied $name_base/$x";
398 AC_MSG_WARN($name/Implies specifies nonexistent $x)
405 # Add NAME to the list of names.
408 # Find the parent of NAME, using the empty string if it has none.
410 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
413 # Add the names implied by NAME, and NAME's parent (if it has one), to
414 # the list of names to be processed (the argument list). We prepend the
415 # implied names to the list and append the parent. We want implied
416 # directories to come before further directories inferred from the
417 # configuration components; this ensures that for sysv4, unix/common
418 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
420 sysnames="`echo $implied $* $parent`"
421 test -n "$sysnames" && set $sysnames
424 # Add the default directories.
425 default_sysnames=sysdeps/generic
426 if test "$elf" = yes; then
427 default_sysnames="sysdeps/generic/elf $default_sysnames"
429 sysnames="$names $default_sysnames"
431 # The other names were emitted during the scan.
432 AC_MSG_RESULT($default_sysnames)
438 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
439 # The makefiles need to use a different form to find it in $srcdir.
440 INSTALL='\$(..)./install-sh -c'
444 # These programs are version sensitive.
445 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
446 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
447 [version \([egcygnustp-]*[0-9.]*\)],
448 [egcs-2.9[1-9].*|egcs-2.90.2[789]|egcs-2.90.[3-9][0-9]|*gcc-2.9[1-9].*|pgcc-2.90.2[789]|pgcc-2.90.[3-9][0-9]|*2.8.[1-9]*|*2.9|*2.9.[0-9]*|cygnus-2.9[1-9].*|gcc-2.9[5-9]|gcc-2.1[0-9][0-9]],
450 AC_CHECK_PROG_VER(MAKE, make gmake, --version,
451 [version \([0-9][0-9.]*\), by],
452 [3.75 | 3.76.[1-9]* | 3.7[789]* | 3.[89]*], critic_missing=t)
454 AC_CHECK_PROG_VER(MSGFMT, msgfmt gmsgfmt, --version,
455 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
456 [0.[1-9][0-9].* | [1-9].*], MSGFMT=: aux_missing=t)
457 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
458 [GNU texinfo.* \([0-9][0-9.]*\)],
459 [3.1[1-9] | 3.[2-9][0-9] | 1.6[89] | 1.7[0-9]], MAKEINFO=: aux_missing=t)
461 if test -n "$critic_missing"; then
463 *** Some critical program is missing or too old.
464 *** Check the INSTALL file for required versions.])
467 test -n "$aux_missing" && AC_MSG_WARN([
468 *** An auxiliary program is missing or too old;
469 *** some features will be disabled.
470 *** Check the INSTALL file for required versions.])
474 if test $host != $build; then
475 AC_CHECK_PROGS(BUILD_CC, gcc cc)
477 AC_SUBST(cross_compiling)
480 AC_CHECK_TOOL(MIG, mig)
482 # if using special system headers, find out the compiler's sekrit
483 # header directory and add that to the list. NOTE: Only does the right
484 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
485 if test -n "$sysheaders"; then
486 ccheaders=`$CC -print-file-name=include`
487 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
489 AC_SUBST(SYSINCLUDES)
491 # check if ranlib is necessary
492 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
493 cat > conftest.c <<EOF
498 $CC $CFLAGS -c conftest.c
499 $AR cr conftest.a conftest.c
500 cp conftest.a conftest2.a
502 if cmp -s conftest.a conftest2.a; then
503 libc_cv_ranlib_necessary=no
505 libc_cv_ranlib_necessary=yes
508 if test "$libc_cv_ranlib_necessary" = no; then
512 # Test if LD_LIBRARY_PATH contains the notation for the current directory
513 # since this would lead to problems installing/building glibc.
514 # LD_LIBRARY_PATH contains the current directory if one of the following
516 # - one of the terminals (":" and ";") is the first or last sign
517 # - two terminals occur directly after each other
518 # - the path contains an element with a dot in it
519 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
521 case ${LD_LIBRARY_PATH} in
522 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
523 ld_library_path_setting="contains current directory"
526 ld_library_path_setting="ok"
530 AC_MSG_RESULT($ld_library_path_setting)
531 if test "$ld_library_path_setting" != "ok"; then
533 *** LD_LIBRARY_PATH shouldn't contain the current directory when
534 *** building glibc. Please change the environment variable
535 *** and run configure again.])
538 AC_PATH_PROG(BASH, bash, no)
539 if test "$BASH" != no &&
540 $BASH -c 'test "$BASH_VERSINFO" \
541 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
542 libc_cv_have_bash2=yes
544 libc_cv_have_bash2=no
546 AC_SUBST(libc_cv_have_bash2)
548 dnl We need a ksh compatible shell for tzselect.
549 if test "$BASH" = no; then
550 AC_PATH_PROG(KSH, ksh, no)
551 if test "$KSH" = no; then
561 AC_SUBST(libc_cv_have_ksh)
564 AC_PATH_PROG(PERL, perl, no)
566 AC_PATH_PROG(INSTALL_INFO, install-info, no,
567 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
568 AC_SUBST(INSTALL_INFO)
569 if test "$INSTALL_INFO" != "no"; then
570 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
572 # There is a hard ^_ on the next line. I am open to better ideas.
574 echo 'File: dir Node: Top This is the top of the INFO tree'
575 echo '* Menu:') >conftest.d/dir
576 (echo 'INFO-DIR-SECTION i-d-s works'
577 echo 'START-INFO-DIR-ENTRY'
578 echo '* Prog: (prog). Program.'
579 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
580 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
582 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
583 then libc_cv_old_debian_install_info=no
584 else libc_cv_old_debian_install_info=yes
586 else libc_cv_old_debian_install_info=no testfailed=t
589 if test -n "$testfailed"
590 then AC_MSG_WARN([install-info errored out, check config.log])
592 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
594 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
596 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
597 echo '#include <stddef.h>
598 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
599 if eval "$ac_cpp conftest.c 2>/dev/null" \
600 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
601 libc_cv_signed_size_t=no
603 libc_cv_signed_size_t=yes
606 if test $libc_cv_signed_size_t = yes; then
607 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
608 cat >> confdefs.h <<\EOF
610 #define __SIZE_TYPE__ unsigned
614 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
616 [#define __need_size_t
617 #define __need_wchar_t
620 #include <stddef.h>], [size_t size; wchar_t wchar;
622 #error stddef.h ignored __need_*
624 if (&size == NULL || &wchar == NULL) abort ();],
625 libc_cv_friendly_stddef=yes,
626 libc_cv_friendly_stddef=no)])
627 if test $libc_cv_friendly_stddef = yes; then
628 config_vars="$config_vars
629 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
632 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
633 libc_cv_need_minus_P, [dnl
634 cat > conftest.S <<EOF
635 #include "confdefs.h"
636 /* Nothing whatsoever. */
638 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
639 libc_cv_need_minus_P=no
641 libc_cv_need_minus_P=yes
644 if test $libc_cv_need_minus_P = yes; then
645 config_vars="$config_vars
646 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
649 AC_CACHE_CHECK(for assembler global-symbol directive,
650 libc_cv_asm_global_directive, [dnl
651 libc_cv_asm_global_directive=UNKNOWN
652 for ac_globl in .globl .global; do
653 cat > conftest.s <<EOF
658 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
659 libc_cv_asm_global_directive=${ac_globl}
662 test $libc_cv_asm_global_directive != UNKNOWN && break
664 if test $libc_cv_asm_global_directive = UNKNOWN; then
665 AC_MSG_ERROR(cannot determine asm global directive)
667 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
670 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
671 cat > conftest.s <<EOF
674 .set glibc_conftest_frobozz,foo
675 $libc_cv_asm_global_directive glibc_conftest_frobozz
677 # The alpha-dec-osf1 assembler gives only a warning for `.set'
678 # (but it doesn't work), so we must do a linking check to be sure.
679 cat > conftest1.c <<\EOF
680 extern int glibc_conftest_frobozz;
681 main () { printf ("%d\n", glibc_conftest_frobozz); }
683 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
684 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
685 libc_cv_asm_set_directive=yes
687 libc_cv_asm_set_directive=no
690 if test $libc_cv_asm_set_directive = yes; then
691 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
694 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
695 [cat > conftest.s <<EOF
698 .symver _sym,sym@VERS
700 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
701 libc_cv_asm_symver_directive=yes
703 libc_cv_asm_symver_directive=no
706 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
707 if test $libc_cv_asm_symver_directive = yes; then
708 cat > conftest.s <<EOF
711 .symver _sym,sym@VERS
713 cat > conftest.map <<EOF
722 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
723 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
724 -nostartfiles -nostdlib
725 -Wl,--version-script,conftest.map
728 libc_cv_ld_version_script_option=yes
730 libc_cv_ld_version_script_option=no
733 libc_cv_ld_version_script_option=no
736 libc_cv_ld_version_script_option=no
739 if test $libc_cv_asm_symver_directive = yes &&
740 test $libc_cv_ld_version_script_option = yes &&
741 test $enable_versioning = yes; then
743 AC_DEFINE(DO_VERSIONING)
749 if test $VERSIONING = no; then
751 *** WARNING: You should not compile GNU libc without versioning. Not using
752 *** versioning will introduce incompatibilities so that old binaries
753 *** will not run anymore.
754 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
756 if test $elf = yes; then
757 AC_CACHE_CHECK(for .previous assembler directive,
758 libc_cv_asm_previous_directive, [dnl
759 cat > conftest.s <<EOF
763 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
764 libc_cv_asm_previous_directive=yes
766 libc_cv_asm_previous_directive=no
769 if test $libc_cv_asm_previous_directive = yes; then
770 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
772 AC_CACHE_CHECK(for .popsection assembler directive,
773 libc_cv_asm_popsection_directive, [dnl
774 cat > conftest.s <<EOF
775 .pushsection foo_section
778 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
779 libc_cv_asm_popsection_directive=yes
781 libc_cv_asm_popsection_directive=no
784 if test $libc_cv_asm_popsection_directive = yes; then
785 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
790 if test $elf != yes; then
791 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
792 [AC_TRY_COMPILE(, [asm (".section .init");
793 asm (".section .fini");
795 libc_cv_have_initfini=yes,
796 libc_cv_have_initfini=no)])
797 AC_SUBST(libc_cv_have_initfini)dnl
798 if test $libc_cv_have_initfini = yes; then
799 AC_DEFINE(HAVE_INITFINI)
803 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
804 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
805 [cat > conftest.$ac_ext <<EOF
806 dnl This sometimes fails to find confdefs.h, for some reason.
807 dnl [#]line __oline__ "[$]0"
808 [#]line __oline__ "configure"
809 #include "confdefs.h"
810 void underscore_test(void) {
813 if AC_TRY_EVAL(ac_compile); then
814 if grep _underscore_test conftest* >/dev/null; then
815 ifelse([$1], , :, [rm -f conftest*
818 ifelse([$2], , , [rm -f conftest*
822 echo "configure: failed program was:" >&AC_FD_CC
823 cat conftest.$ac_ext >&AC_FD_CC
824 ifelse([$2], , , [rm -f conftest*
829 if test $elf = yes; then
830 libc_cv_asm_underscores=no
832 if test $ac_cv_prog_cc_works = yes; then
833 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
834 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
835 libc_cv_asm_underscores=yes,
836 libc_cv_asm_underscores=no)])
838 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
839 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
840 libc_cv_asm_underscores=no)])
843 if test $libc_cv_asm_underscores = no; then
844 AC_DEFINE(NO_UNDERSCORES)
847 if test $elf = yes; then
848 libc_cv_weak_symbols=yes
851 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
853 cat > conftest.s <<EOF
855 ${libc_cv_asm_global_directive} foo
860 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
861 libc_cv_asm_weak_directive=yes
863 libc_cv_asm_weak_directive=no
867 if test $libc_cv_asm_weak_directive = no; then
868 AC_CACHE_CHECK(for assembler .weakext directive,
869 libc_cv_asm_weakext_directive,
871 cat > conftest.s <<EOF
873 ${libc_cv_asm_global_directive} foo
877 ${libc_cv_asm_global_directive} baz
880 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
881 libc_cv_asm_weakext_directive=yes
883 libc_cv_asm_weakext_directive=no
889 if test $libc_cv_asm_weak_directive = yes; then
890 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
891 elif test $libc_cv_asm_weakext_directive = yes; then
892 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
895 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
896 cat > conftest.c <<\EOF
901 dnl No \ in command here because it ends up inside ''.
902 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
903 -nostdlib -nostartfiles -Wl,--no-whole-archive
904 -o conftest conftest.c 1>&AC_FD_CC]); then
905 libc_cv_ld_no_whole_archive=yes
907 libc_cv_ld_no_whole_archive=no
910 if test $libc_cv_ld_no_whole_archive = yes; then
911 no_whole_archive=-Wl,--no-whole-archive
913 AC_SUBST(no_whole_archive)dnl
915 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
916 cat > conftest.c <<\EOF
921 dnl No \ in command here because it ends up inside ''.
922 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
923 -nostdlib -nostartfiles -fexceptions
924 -o conftest conftest.c 1>&AC_FD_CC]); then
925 libc_cv_gcc_exceptions=yes
927 libc_cv_gcc_exceptions=no
930 if test $libc_cv_gcc_exceptions = yes; then
931 exceptions=-fexceptions
933 AC_SUBST(exceptions)dnl
935 if test "$base_machine" = alpha ; then
936 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
937 cat > conftest.c <<\EOF
941 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
943 libc_cv_gcc_alpha_ng_prefix=yes
945 libc_cv_gcc_alpha_ng_prefix=no
948 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
949 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
951 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
955 if test "$host_cpu" = powerpc ; then
956 # Check for a bug present in at least versions 2.8.x of GCC
957 # and versions 1.0.x of EGCS.
958 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
959 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
960 libc_cv_c_asmcr0_bug='no',
961 libc_cv_c_asmcr0_bug='yes')])
962 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
963 AC_DEFINE(BROKEN_PPC_ASM_CR0)
967 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
968 [cat > conftest.c <<EOF
969 #line __oline__ "configure"
970 static char __EH_FRAME_BEGIN__[];
973 #ifdef CHECK__register_frame
974 __register_frame (__EH_FRAME_BEGIN__);
975 __deregister_frame (__EH_FRAME_BEGIN__);
977 #ifdef CHECK__register_frame_info
978 __register_frame_info (__EH_FRAME_BEGIN__);
979 __deregister_frame_info (__EH_FRAME_BEGIN__);
984 /* FIXME: this is fragile. */
994 dnl No \ in command here because it ends up inside ''.
995 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
996 -nostdlib -nostartfiles
997 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
998 libc_cv_gcc_dwarf2_unwind_info=static
1000 libc_cv_gcc_dwarf2_unwind_info=no
1002 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1003 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1004 -nostdlib -nostartfiles
1005 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1006 libc_cv_gcc_dwarf2_unwind_info=yes
1008 libc_cv_gcc_dwarf2_unwind_info=no
1012 case $libc_cv_gcc_dwarf2_unwind_info in
1014 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1017 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1018 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1022 dnl Check whether compiler understands __builtin_expect.
1023 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1024 [cat > conftest.c <<EOF
1025 #line __oline__ "configure"
1028 a = __builtin_expect (a, 10);
1029 return a == 10 ? 0 : 1;
1032 dnl No \ in command here because it ends up inside ''.
1033 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1034 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1035 libc_cv_gcc_builtin_expect=yes
1037 libc_cv_gcc_builtin_expect=no
1040 if test "$libc_cv_gcc_builtin_expect" = yes; then
1041 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1044 ### End of automated tests.
1045 ### Now run sysdeps configure fragments.
1047 # sysdeps configure fragments may set these with files to be linked below.
1051 # They also can set these variables.
1052 ldd_rewrite_script=no
1054 # Iterate over all the sysdep directories we will use, running their
1055 # configure fragments, and looking for a uname implementation.
1057 for dir in $sysnames; do
1060 *) dest=$srcdir/$dir ;;
1062 if test -r $dest/configure; then
1063 AC_MSG_RESULT(running configure fragment for $dest)
1067 if test -z "$uname"; then
1068 if test -r $dest/uname.c ||
1069 test -r $dest/uname.S ||
1070 { test -r $dest/syscalls.list &&
1071 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1078 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1080 # If we will use the generic uname implementation, we must figure out what
1081 # it will say by examining the system, and write the results in config-name.h.
1082 if test "$uname" = "sysdeps/generic"; then
1085 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1087 if test $uname_sysname != $config_os; then
1088 config_release=`echo $config_os | sed s/$uname_sysname//`
1091 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1092 if test -r /vmunix; then
1093 kernel_id=`strings /vmunix | grep UNIX`
1094 elif test -r /dynix; then
1095 kernel_id=`strings /dynix | grep DYNIX`
1101 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1102 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1104 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1106 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1107 != x$config_release; then
1108 # The configuration release is a substring of the kernel release.
1109 libc_cv_uname_release=$kernel_release
1110 elif test x$config_release != x; then
1111 libc_cv_uname_release=$config_release
1112 elif test x$kernel_release != x; then
1113 libc_cv_uname_release=$kernel_release
1115 libc_cv_uname_release=unknown
1117 uname_release="$libc_cv_uname_release"
1119 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1120 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1122 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1124 if test -n "$kernel_version"; then
1125 libc_cv_uname_version="$kernel_version"
1127 libc_cv_uname_version=unknown
1129 uname_version="$libc_cv_uname_version"
1131 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1132 config_uname=config-name.h:config-name.in
1134 # For non-generic uname, we don't need to create config-name.h at all.
1138 AC_MSG_CHECKING(stdio selection)
1141 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1142 default) stdio=stdio ;;
1144 AC_MSG_RESULT($stdio)
1146 # Test for old glibc 2.0.x headers so that they can be removed properly
1147 # Search only in includedir.
1148 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1149 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1151 old_glibc_headers=yes
1153 old_glibc_headers=no
1155 AC_MSG_RESULT($old_glibc_headers)
1156 if test ${old_glibc_headers} = yes; then
1157 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1158 AC_MSG_WARN(*** be removed.)
1160 AC_SUBST(old_glibc_headers)
1162 AC_SUBST(libc_cv_slibdir)
1163 AC_SUBST(libc_cv_sysconfdir)
1164 AC_SUBST(libc_cv_rootsbindir)
1166 AC_SUBST(has_ldconfig)
1167 AC_SUBST(ldd_rewrite_script)
1169 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1170 if test $gnu_ld = yes; then
1171 AC_DEFINE(HAVE_GNU_LD)
1173 if test $gnu_as = yes; then
1174 AC_DEFINE(HAVE_GNU_AS)
1176 if test $elf = yes; then
1182 if test $shared = default; then
1183 if test $gnu_ld = yes; then
1186 # For now we do not assume shared libs are available. In future more
1187 # tests might become available.
1192 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1194 cat > conftest.c <<EOF
1195 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1196 # error PIC is default.
1199 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1203 AC_SUBST(pic_default)
1208 AC_SUBST(static_nss)
1209 AC_SUBST(nopic_initfini)
1214 *door*) linux_doors=yes ;;
1215 *) linux_doors=no ;;
1217 AC_SUBST(linux_doors)
1219 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1222 config_makefile=Makefile
1225 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1226 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1230 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1231 case $CONFIG_FILES in *config.make*)
1232 echo "$config_vars" >> config.make;;
1234 test -d bits || mkdir bits], [config_vars='$config_vars'])