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=$enableval, force_install=yes)
134 AC_SUBST(force_install)
136 dnl On some platforms we allow dropping compatibility with all kernel
138 AC_ARG_ENABLE(kernel,
139 [ --enable-kernel=VERSION compile for compatibility with kernel not older
141 minimum_kernel=$enableval)
145 # The way shlib-versions is used to generate soversions.mk uses a
146 # fairly simplistic model for name recognition that can't distinguish
147 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
148 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
149 # tell. This doesn't get used much beyond that, so it's fairly safe.
154 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
158 # We keep the original values in `$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* | irix6*)
174 # These systems (almost) always use the ELF format.
179 machine=$config_machine
180 vendor=$config_vendor
184 ### I put this here to prevent those annoying emails from people who cannot
185 ### read and try to compile glibc on unsupported platforms. --drepper
187 ### By using the undocumented --enable-hacker-mode option for configure
188 ### one can skip this test to make the configuration not fail for unsupported
191 if test -z "$enable_hacker_mode"; then
192 case "$machine-$host_os" in
193 *-linux* | *-gnu* | arm*-none*)
196 echo "*** The GNU C library is currently not available for this platform."
197 echo "*** So far nobody cared to port it and if there is no volunteer it"
198 echo "*** might never happen. So, if you have interest to see glibc on"
199 echo "*** this platform visit"
200 echo "*** http://www.gnu.org/software/libc/porting.html"
201 echo "*** and join the group of porters"
207 dnl We need to use [ and ] for other purposes for a while now.
209 # Expand the configuration machine name into a subdirectory by architecture
210 # type and particular chip.
212 a29k | am29000) base_machine=a29k machine=a29k ;;
213 alpha*) base_machine=alpha machine=alpha/$machine ;;
214 arm*) base_machine=arm machine=arm/$machine ;;
215 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
216 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
217 hppa*) base_machine=hppa machine=hppa/$machine ;;
218 i[3456]86) base_machine=i386 machine=i386/$machine ;;
219 m680?0) base_machine=m68k machine=m68k/$machine ;;
220 m68k) base_machine=m68k machine=m68k/m68020 ;;
221 m88???) base_machine=m88k machine=m88k/$machine ;;
222 m88k) base_machine=m88k machine=m88k/m88100 ;;
223 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
224 mips*) base_machine=mips
226 IP22) machine=mips/mips3 ;;
227 *) machine=mips/$machine ;;
230 base_machine=sparc machine=sparc/sparc32 ;;
231 sparcv8 | supersparc | hypersparc)
232 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
233 sparcv8plus | sparcv8plusa | sparcv9)
234 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
235 sparc64 | ultrasparc)
236 base_machine=sparc machine=sparc/sparc64 ;;
239 AC_SUBST(base_machine)
241 if test "$base_machine" = "i386"; then
242 AC_DEFINE(USE_REGPARMS)
245 # Compute the list of sysdep directories for this configuration.
246 # This can take a while to compute.
247 sysdep_dir=$srcdir/sysdeps
248 AC_MSG_CHECKING(sysdep dirs)
249 dnl We need to use [ and ] for other purposes for a while now.
251 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
252 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
257 netbsd* | 386bsd* | freebsd* | bsdi*)
258 base_os=unix/bsd/bsd4.4 ;;
259 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
261 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
264 base_os=unix/sysv/irix6/$os ;;
266 base_os=unix/sysv/sysv4 ;;
268 base_os=unix/sysv/hpux/$os ;;
270 base_os=standalone ;;
275 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
278 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
282 o=`echo $tail | sed 's/[0-9]*$//'`
283 if test $o != $tail; then
286 # For linux-gnu, try linux-gnu, then linux.
287 o=`echo $tail | sed 's/-.*$//'`
288 if test $o != $tail; then
292 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
295 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
301 # For sparc/sparc32, try sparc/sparc32 and then sparc.
304 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
306 # Prepend the machine's FPU directory unless --without-fp.
307 if test "$with_fp" = yes; then
314 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
317 # Find what sysdep directories exist.
319 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
320 for d in $add_ons_pfx ''; do
321 for b in $base ''; do
322 for m0 in $mach ''; do
323 for v in /$vendor ''; do
324 test "$v" = / && continue
325 for o in /$ostry ''; do
326 test "$o" = / && continue
327 for m in $mach ''; do
328 if test "$m0$b$v$o$m"; then
329 try="${d}sysdeps$m0$b$v$o$m"
330 test -n "$enable_debug_configure" &&
331 echo "$0 [DEBUG]: try $try" >&2
332 if test -d $srcdir/$try; then
333 sysnames="$sysnames $try"
334 { test -n "$o" || test -n "$b"; } && os_used=t
335 { test -n "$m" || test -n "$m0"; } && machine_used=t
346 if test -z "$os_used" && test "$os" != none; then
347 AC_MSG_ERROR(Operating system $os is not supported.)
349 if test -z "$machine_used" && test "$machine" != none; then
350 AC_MSG_ERROR(The $machine is not supported.)
353 # We have now validated the configuration.
356 # If using ELF, look for an `elf' subdirectory of each machine directory.
357 # We prepend these rather than inserting them whereever the machine appears
358 # because things specified by the machine's ELF ABI should override
359 # OS-specific things, and should always be the same for any OS on the
360 # machine (otherwise what's the point of an ABI?).
361 if test "$elf" = yes; then
363 for d in $add_ons_pfx ''; do
365 if test -d $srcdir/${d}sysdeps$m/elf; then
366 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
370 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
374 # Expand the list of system names into a full list of directories
375 # from each element's parent name and Implies file (if present).
378 while test $# -gt 0; do
382 case " $names " in *" $name "*)
383 # Already in the list.
387 # Report each name as we discover it, so there is no long pause in output.
388 echo $ac_n "$name $ac_c" >&AC_FD_MSG
390 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
394 *) xsrcdir=$srcdir/ ;;
396 test -n "$enable_debug_configure" &&
397 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
399 if test -f $xsrcdir$name/Implies; then
400 # Collect more names from the `Implies' file (removing comments).
401 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
403 for x in $implied_candidate; do
404 if test -d $xsrcdir$name_base/$x; then
405 implied="$implied $name_base/$x";
407 AC_MSG_WARN($name/Implies specifies nonexistent $x)
414 # Add NAME to the list of names.
417 # Find the parent of NAME, using the empty string if it has none.
419 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
422 # Add the names implied by NAME, and NAME's parent (if it has one), to
423 # the list of names to be processed (the argument list). We prepend the
424 # implied names to the list and append the parent. We want implied
425 # directories to come before further directories inferred from the
426 # configuration components; this ensures that for sysv4, unix/common
427 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
429 sysnames="`echo $implied $* $parent`"
430 test -n "$sysnames" && set $sysnames
433 # Add the default directories.
434 default_sysnames=sysdeps/generic
435 if test "$elf" = yes; then
436 default_sysnames="sysdeps/generic/elf $default_sysnames"
438 sysnames="$names $default_sysnames"
440 # The other names were emitted during the scan.
441 AC_MSG_RESULT($default_sysnames)
447 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
448 # The makefiles need to use a different form to find it in $srcdir.
449 INSTALL='\$(..)./scripts/install-sh -c'
453 # These programs are version sensitive.
454 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
455 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
456 [version \([egcygnustp-]*[0-9.]*\)],
457 [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]*|2.9[5-9]*|cygnus-2.9[1-9].*|gcc-2.9[5-9]|gcc-2.1[0-9][0-9]],
459 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
460 [version \([0-9][0-9.]*\), by],
461 [3.75 | 3.76.[1-9]* | 3.7[789]* | 3.[89]*], critic_missing=t)
463 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
464 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
465 [0.[1-9][0-9].* | [1-9].*], MSGFMT=: aux_missing=t)
466 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
467 [GNU texinfo.* \([0-9][0-9.]*\)],
468 [3.1[1-9] | 3.[2-9][0-9] | 1.6[89] | 1.7[0-9]], MAKEINFO=: aux_missing=t)
470 if test -n "$critic_missing"; then
472 *** Some critical program is missing or too old.
473 *** Check the INSTALL file for required versions.])
476 test -n "$aux_missing" && AC_MSG_WARN([
477 *** An auxiliary program is missing or too old;
478 *** some features will be disabled.
479 *** Check the INSTALL file for required versions.])
481 # glibcbug.in wants to know the compiler version.
482 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
487 if test $host != $build; then
488 AC_CHECK_PROGS(BUILD_CC, gcc cc)
490 AC_SUBST(cross_compiling)
493 AC_CHECK_TOOL(MIG, mig)
495 # if using special system headers, find out the compiler's sekrit
496 # header directory and add that to the list. NOTE: Only does the right
497 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
498 if test -n "$sysheaders"; then
499 ccheaders=`$CC -print-file-name=include`
500 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
502 AC_SUBST(SYSINCLUDES)
504 # check if ranlib is necessary
505 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
506 cat > conftest.c <<EOF
511 $CC $CFLAGS -c conftest.c
512 $AR cr conftest.a conftest.c
513 cp conftest.a conftest2.a
515 if cmp -s conftest.a conftest2.a; then
516 libc_cv_ranlib_necessary=no
518 libc_cv_ranlib_necessary=yes
521 if test "$libc_cv_ranlib_necessary" = no; then
525 # Test if LD_LIBRARY_PATH contains the notation for the current directory
526 # since this would lead to problems installing/building glibc.
527 # LD_LIBRARY_PATH contains the current directory if one of the following
529 # - one of the terminals (":" and ";") is the first or last sign
530 # - two terminals occur directly after each other
531 # - the path contains an element with a dot in it
532 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
534 case ${LD_LIBRARY_PATH} in
535 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
536 ld_library_path_setting="contains current directory"
539 ld_library_path_setting="ok"
543 AC_MSG_RESULT($ld_library_path_setting)
544 if test "$ld_library_path_setting" != "ok"; then
546 *** LD_LIBRARY_PATH shouldn't contain the current directory when
547 *** building glibc. Please change the environment variable
548 *** and run configure again.])
551 AC_PATH_PROG(BASH, bash, no)
552 if test "$BASH" != no &&
553 $BASH -c 'test "$BASH_VERSINFO" \
554 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
555 libc_cv_have_bash2=yes
557 libc_cv_have_bash2=no
559 AC_SUBST(libc_cv_have_bash2)
561 dnl We need a ksh compatible shell for tzselect.
562 if test "$BASH" = no; then
563 AC_PATH_PROG(KSH, ksh, no)
564 if test "$KSH" = no; then
574 AC_SUBST(libc_cv_have_ksh)
577 AC_PATH_PROG(PERL, perl, no)
579 AC_PATH_PROG(INSTALL_INFO, install-info, no,
580 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
581 AC_SUBST(INSTALL_INFO)
582 if test "$INSTALL_INFO" != "no"; then
583 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
585 # There is a hard ^_ on the next line. I am open to better ideas.
587 echo 'File: dir Node: Top This is the top of the INFO tree'
588 echo '* Menu:') >conftest.d/dir
589 (echo 'INFO-DIR-SECTION i-d-s works'
590 echo 'START-INFO-DIR-ENTRY'
591 echo '* Prog: (prog). Program.'
592 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
593 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
595 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
596 then libc_cv_old_debian_install_info=no
597 else libc_cv_old_debian_install_info=yes
599 else libc_cv_old_debian_install_info=no testfailed=t
602 if test -n "$testfailed"
603 then AC_MSG_WARN([install-info errored out, check config.log])
605 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
607 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
609 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
610 echo '#include <stddef.h>
611 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
612 if eval "$ac_cpp conftest.c 2>/dev/null" \
613 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
614 libc_cv_signed_size_t=no
616 libc_cv_signed_size_t=yes
619 if test $libc_cv_signed_size_t = yes; then
620 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
621 cat >> confdefs.h <<\EOF
623 #define __SIZE_TYPE__ unsigned
627 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
629 [#define __need_size_t
630 #define __need_wchar_t
633 #include <stddef.h>], [size_t size; wchar_t wchar;
635 #error stddef.h ignored __need_*
637 if (&size == NULL || &wchar == NULL) abort ();],
638 libc_cv_friendly_stddef=yes,
639 libc_cv_friendly_stddef=no)])
640 if test $libc_cv_friendly_stddef = yes; then
641 config_vars="$config_vars
642 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
645 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
646 libc_cv_need_minus_P, [dnl
647 cat > conftest.S <<EOF
648 #include "confdefs.h"
649 /* Nothing whatsoever. */
651 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
652 libc_cv_need_minus_P=no
654 libc_cv_need_minus_P=yes
657 if test $libc_cv_need_minus_P = yes; then
658 config_vars="$config_vars
659 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
662 AC_CACHE_CHECK(for assembler global-symbol directive,
663 libc_cv_asm_global_directive, [dnl
664 libc_cv_asm_global_directive=UNKNOWN
665 for ac_globl in .globl .global .EXPORT; do
666 cat > conftest.s <<EOF
671 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
672 libc_cv_asm_global_directive=${ac_globl}
675 test $libc_cv_asm_global_directive != UNKNOWN && break
677 if test $libc_cv_asm_global_directive = UNKNOWN; then
678 AC_MSG_ERROR(cannot determine asm global directive)
680 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
683 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
684 cat > conftest.s <<EOF
687 .set glibc_conftest_frobozz,foo
688 $libc_cv_asm_global_directive glibc_conftest_frobozz
690 # The alpha-dec-osf1 assembler gives only a warning for `.set'
691 # (but it doesn't work), so we must do a linking check to be sure.
692 cat > conftest1.c <<\EOF
693 extern int glibc_conftest_frobozz;
694 main () { printf ("%d\n", glibc_conftest_frobozz); }
696 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
697 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
698 libc_cv_asm_set_directive=yes
700 libc_cv_asm_set_directive=no
703 if test $libc_cv_asm_set_directive = yes; then
704 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
707 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
708 [cat > conftest.s <<EOF
711 .symver _sym,sym@VERS
713 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
714 libc_cv_asm_symver_directive=yes
716 libc_cv_asm_symver_directive=no
719 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
720 if test $libc_cv_asm_symver_directive = yes; then
721 cat > conftest.s <<EOF
724 .symver _sym,sym@VERS
726 cat > conftest.map <<EOF
735 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
736 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
737 -nostartfiles -nostdlib
738 -Wl,--version-script,conftest.map
741 libc_cv_ld_version_script_option=yes
743 libc_cv_ld_version_script_option=no
746 libc_cv_ld_version_script_option=no
749 libc_cv_ld_version_script_option=no
752 if test $libc_cv_asm_symver_directive = yes &&
753 test $libc_cv_ld_version_script_option = yes &&
754 test $enable_versioning = yes; then
756 AC_DEFINE(DO_VERSIONING)
762 if test $VERSIONING = no; then
764 *** WARNING: You should not compile GNU libc without versioning. Not using
765 *** versioning will introduce incompatibilities so that old binaries
766 *** will not run anymore.
767 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
769 if test $elf = yes; then
770 AC_CACHE_CHECK(for .previous assembler directive,
771 libc_cv_asm_previous_directive, [dnl
772 cat > conftest.s <<EOF
776 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
777 libc_cv_asm_previous_directive=yes
779 libc_cv_asm_previous_directive=no
782 if test $libc_cv_asm_previous_directive = yes; then
783 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
785 AC_CACHE_CHECK(for .popsection assembler directive,
786 libc_cv_asm_popsection_directive, [dnl
787 cat > conftest.s <<EOF
788 .pushsection foo_section
791 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
792 libc_cv_asm_popsection_directive=yes
794 libc_cv_asm_popsection_directive=no
797 if test $libc_cv_asm_popsection_directive = yes; then
798 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
803 if test $elf != yes; then
804 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
805 [AC_TRY_COMPILE(, [asm (".section .init");
806 asm (".section .fini");
808 libc_cv_have_initfini=yes,
809 libc_cv_have_initfini=no)])
810 AC_SUBST(libc_cv_have_initfini)dnl
811 if test $libc_cv_have_initfini = yes; then
812 AC_DEFINE(HAVE_INITFINI)
816 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
817 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
818 [cat > conftest.$ac_ext <<EOF
819 dnl This sometimes fails to find confdefs.h, for some reason.
820 dnl [#]line __oline__ "[$]0"
821 [#]line __oline__ "configure"
822 #include "confdefs.h"
823 void underscore_test(void) {
826 if AC_TRY_EVAL(ac_compile); then
827 if grep _underscore_test conftest* >/dev/null; then
828 ifelse([$1], , :, [rm -f conftest*
831 ifelse([$2], , , [rm -f conftest*
835 echo "configure: failed program was:" >&AC_FD_CC
836 cat conftest.$ac_ext >&AC_FD_CC
837 ifelse([$2], , , [rm -f conftest*
842 if test $elf = yes; then
843 libc_cv_asm_underscores=no
845 if test $ac_cv_prog_cc_works = yes; then
846 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
847 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
848 libc_cv_asm_underscores=yes,
849 libc_cv_asm_underscores=no)])
851 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
852 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
853 libc_cv_asm_underscores=no)])
856 if test $libc_cv_asm_underscores = no; then
857 AC_DEFINE(NO_UNDERSCORES)
860 if test $elf = yes; then
861 libc_cv_weak_symbols=yes
864 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
866 cat > conftest.s <<EOF
868 ${libc_cv_asm_global_directive} foo
873 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
874 libc_cv_asm_weak_directive=yes
876 libc_cv_asm_weak_directive=no
880 if test $libc_cv_asm_weak_directive = no; then
881 AC_CACHE_CHECK(for assembler .weakext directive,
882 libc_cv_asm_weakext_directive,
884 cat > conftest.s <<EOF
886 ${libc_cv_asm_global_directive} foo
890 ${libc_cv_asm_global_directive} baz
893 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
894 libc_cv_asm_weakext_directive=yes
896 libc_cv_asm_weakext_directive=no
902 if test $libc_cv_asm_weak_directive = yes; then
903 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
904 elif test $libc_cv_asm_weakext_directive = yes; then
905 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
908 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
909 cat > conftest.c <<\EOF
914 dnl No \ in command here because it ends up inside ''.
915 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
916 -nostdlib -nostartfiles -Wl,--no-whole-archive
917 -o conftest conftest.c 1>&AC_FD_CC]); then
918 libc_cv_ld_no_whole_archive=yes
920 libc_cv_ld_no_whole_archive=no
923 if test $libc_cv_ld_no_whole_archive = yes; then
924 no_whole_archive=-Wl,--no-whole-archive
926 AC_SUBST(no_whole_archive)dnl
928 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
929 cat > conftest.c <<\EOF
934 dnl No \ in command here because it ends up inside ''.
935 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
936 -nostdlib -nostartfiles -fexceptions
937 -o conftest conftest.c 1>&AC_FD_CC]); then
938 libc_cv_gcc_exceptions=yes
940 libc_cv_gcc_exceptions=no
943 if test $libc_cv_gcc_exceptions = yes; then
944 exceptions=-fexceptions
946 AC_SUBST(exceptions)dnl
948 if test "$base_machine" = alpha ; then
949 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
950 cat > conftest.c <<\EOF
954 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
956 libc_cv_gcc_alpha_ng_prefix=yes
958 libc_cv_gcc_alpha_ng_prefix=no
961 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
962 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
964 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
968 if test "$host_cpu" = powerpc ; then
969 # Check for a bug present in at least versions 2.8.x of GCC
970 # and versions 1.0.x of EGCS.
971 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
972 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
973 libc_cv_c_asmcr0_bug='no',
974 libc_cv_c_asmcr0_bug='yes')])
975 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
976 AC_DEFINE(BROKEN_PPC_ASM_CR0)
980 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
981 [cat > conftest.c <<EOF
982 #line __oline__ "configure"
983 static char __EH_FRAME_BEGIN__[];
986 #ifdef CHECK__register_frame
987 __register_frame (__EH_FRAME_BEGIN__);
988 __deregister_frame (__EH_FRAME_BEGIN__);
990 #ifdef CHECK__register_frame_info
991 __register_frame_info (__EH_FRAME_BEGIN__);
992 __deregister_frame_info (__EH_FRAME_BEGIN__);
997 /* FIXME: this is fragile. */
1007 dnl No \ in command here because it ends up inside ''.
1008 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1009 -nostdlib -nostartfiles
1010 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1011 libc_cv_gcc_dwarf2_unwind_info=static
1013 libc_cv_gcc_dwarf2_unwind_info=no
1015 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1016 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1017 -nostdlib -nostartfiles
1018 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1019 libc_cv_gcc_dwarf2_unwind_info=yes
1021 libc_cv_gcc_dwarf2_unwind_info=no
1025 case $libc_cv_gcc_dwarf2_unwind_info in
1027 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1030 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1031 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1035 dnl Check whether compiler understands __builtin_expect.
1036 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1037 [cat > conftest.c <<EOF
1038 #line __oline__ "configure"
1041 a = __builtin_expect (a, 10);
1042 return a == 10 ? 0 : 1;
1045 dnl No \ in command here because it ends up inside ''.
1046 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1047 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1048 libc_cv_gcc_builtin_expect=yes
1050 libc_cv_gcc_builtin_expect=no
1053 if test "$libc_cv_gcc_builtin_expect" = yes; then
1054 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1057 dnl Check whether the compiler supports subtraction of local labels.
1058 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1059 [cat > conftest.c <<EOF
1061 #line __oline__ "configure"
1064 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1065 void *p = &&l1 + ar[a];
1074 dnl No \ in command here because it ends up inside ''.
1075 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1076 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1077 libc_cv_gcc_subtract_local_labels=yes
1079 libc_cv_gcc_subtract_local_labels=no
1082 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1083 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1087 ### End of automated tests.
1088 ### Now run sysdeps configure fragments.
1090 # sysdeps configure fragments may set these with files to be linked below.
1094 # They also can set these variables.
1095 ldd_rewrite_script=no
1097 # Iterate over all the sysdep directories we will use, running their
1098 # configure fragments, and looking for a uname implementation.
1100 for dir in $sysnames; do
1103 *) dest=$srcdir/$dir ;;
1105 if test -r $dest/configure; then
1106 AC_MSG_RESULT(running configure fragment for $dest)
1110 if test -z "$uname"; then
1111 if test -r $dest/uname.c ||
1112 test -r $dest/uname.S ||
1113 { test -r $dest/syscalls.list &&
1114 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1121 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1123 # If we will use the generic uname implementation, we must figure out what
1124 # it will say by examining the system, and write the results in config-name.h.
1125 if test "$uname" = "sysdeps/generic"; then
1128 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1130 if test $uname_sysname != $config_os; then
1131 config_release=`echo $config_os | sed s/$uname_sysname//`
1134 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1135 if test -r /vmunix; then
1136 kernel_id=`strings /vmunix | grep UNIX`
1137 elif test -r /dynix; then
1138 kernel_id=`strings /dynix | grep DYNIX`
1144 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1145 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1147 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1149 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1150 != x$config_release; then
1151 # The configuration release is a substring of the kernel release.
1152 libc_cv_uname_release=$kernel_release
1153 elif test x$config_release != x; then
1154 libc_cv_uname_release=$config_release
1155 elif test x$kernel_release != x; then
1156 libc_cv_uname_release=$kernel_release
1158 libc_cv_uname_release=unknown
1160 uname_release="$libc_cv_uname_release"
1162 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1163 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1165 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1167 if test -n "$kernel_version"; then
1168 libc_cv_uname_version="$kernel_version"
1170 libc_cv_uname_version=unknown
1172 uname_version="$libc_cv_uname_version"
1174 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1175 config_uname=config-name.h:config-name.in
1177 # For non-generic uname, we don't need to create config-name.h at all.
1181 AC_MSG_CHECKING(stdio selection)
1184 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1185 default) stdio=stdio ;;
1187 AC_MSG_RESULT($stdio)
1189 # Test for old glibc 2.0.x headers so that they can be removed properly
1190 # Search only in includedir.
1191 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1192 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1194 old_glibc_headers=yes
1196 old_glibc_headers=no
1198 AC_MSG_RESULT($old_glibc_headers)
1199 if test ${old_glibc_headers} = yes; then
1200 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1201 AC_MSG_WARN(*** be removed.)
1203 AC_SUBST(old_glibc_headers)
1205 AC_SUBST(libc_cv_slibdir)
1206 AC_SUBST(libc_cv_sysconfdir)
1207 AC_SUBST(libc_cv_rootsbindir)
1209 AC_SUBST(has_ldconfig)
1210 AC_SUBST(ldd_rewrite_script)
1212 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1213 if test $gnu_ld = yes; then
1214 AC_DEFINE(HAVE_GNU_LD)
1216 if test $gnu_as = yes; then
1217 AC_DEFINE(HAVE_GNU_AS)
1219 if test $elf = yes; then
1225 if test $shared = default; then
1226 if test $gnu_ld = yes; then
1229 # For now we do not assume shared libs are available. In future more
1230 # tests might become available.
1235 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1237 cat > conftest.c <<EOF
1238 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1239 # error PIC is default.
1242 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1246 AC_SUBST(pic_default)
1251 AC_SUBST(static_nss)
1252 AC_SUBST(nopic_initfini)
1257 *door*) linux_doors=yes ;;
1258 *) linux_doors=no ;;
1260 AC_SUBST(linux_doors)
1262 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1265 config_makefile=Makefile
1268 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1269 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1273 echo '*** Do NOT install this release on any production system!'
1274 echo '*** It is known to be broken and will be so for quite some time.'
1275 echo '*** Use the latest released version instead.'
1277 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1278 case $CONFIG_FILES in *config.make*)
1279 echo "$config_vars" >> config.make;;
1281 test -d bits || mkdir bits], [config_vars='$config_vars'])