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}/install-sh -c"; then
448 # The makefiles need to use a different form to find it in $srcdir.
449 INSTALL='\$(..)./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, make gmake, --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, msgfmt gmsgfmt, --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.])
483 if test $host != $build; then
484 AC_CHECK_PROGS(BUILD_CC, gcc cc)
486 AC_SUBST(cross_compiling)
489 AC_CHECK_TOOL(MIG, mig)
491 # if using special system headers, find out the compiler's sekrit
492 # header directory and add that to the list. NOTE: Only does the right
493 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
494 if test -n "$sysheaders"; then
495 ccheaders=`$CC -print-file-name=include`
496 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
498 AC_SUBST(SYSINCLUDES)
500 # check if ranlib is necessary
501 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
502 cat > conftest.c <<EOF
507 $CC $CFLAGS -c conftest.c
508 $AR cr conftest.a conftest.c
509 cp conftest.a conftest2.a
511 if cmp -s conftest.a conftest2.a; then
512 libc_cv_ranlib_necessary=no
514 libc_cv_ranlib_necessary=yes
517 if test "$libc_cv_ranlib_necessary" = no; then
521 # Test if LD_LIBRARY_PATH contains the notation for the current directory
522 # since this would lead to problems installing/building glibc.
523 # LD_LIBRARY_PATH contains the current directory if one of the following
525 # - one of the terminals (":" and ";") is the first or last sign
526 # - two terminals occur directly after each other
527 # - the path contains an element with a dot in it
528 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
530 case ${LD_LIBRARY_PATH} in
531 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
532 ld_library_path_setting="contains current directory"
535 ld_library_path_setting="ok"
539 AC_MSG_RESULT($ld_library_path_setting)
540 if test "$ld_library_path_setting" != "ok"; then
542 *** LD_LIBRARY_PATH shouldn't contain the current directory when
543 *** building glibc. Please change the environment variable
544 *** and run configure again.])
547 AC_PATH_PROG(BASH, bash, no)
548 if test "$BASH" != no &&
549 $BASH -c 'test "$BASH_VERSINFO" \
550 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
551 libc_cv_have_bash2=yes
553 libc_cv_have_bash2=no
555 AC_SUBST(libc_cv_have_bash2)
557 dnl We need a ksh compatible shell for tzselect.
558 if test "$BASH" = no; then
559 AC_PATH_PROG(KSH, ksh, no)
560 if test "$KSH" = no; then
570 AC_SUBST(libc_cv_have_ksh)
573 AC_PATH_PROG(PERL, perl, no)
575 AC_PATH_PROG(INSTALL_INFO, install-info, no,
576 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
577 AC_SUBST(INSTALL_INFO)
578 if test "$INSTALL_INFO" != "no"; then
579 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
581 # There is a hard ^_ on the next line. I am open to better ideas.
583 echo 'File: dir Node: Top This is the top of the INFO tree'
584 echo '* Menu:') >conftest.d/dir
585 (echo 'INFO-DIR-SECTION i-d-s works'
586 echo 'START-INFO-DIR-ENTRY'
587 echo '* Prog: (prog). Program.'
588 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
589 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
591 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
592 then libc_cv_old_debian_install_info=no
593 else libc_cv_old_debian_install_info=yes
595 else libc_cv_old_debian_install_info=no testfailed=t
598 if test -n "$testfailed"
599 then AC_MSG_WARN([install-info errored out, check config.log])
601 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
603 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
605 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
606 echo '#include <stddef.h>
607 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
608 if eval "$ac_cpp conftest.c 2>/dev/null" \
609 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
610 libc_cv_signed_size_t=no
612 libc_cv_signed_size_t=yes
615 if test $libc_cv_signed_size_t = yes; then
616 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
617 cat >> confdefs.h <<\EOF
619 #define __SIZE_TYPE__ unsigned
623 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
625 [#define __need_size_t
626 #define __need_wchar_t
629 #include <stddef.h>], [size_t size; wchar_t wchar;
631 #error stddef.h ignored __need_*
633 if (&size == NULL || &wchar == NULL) abort ();],
634 libc_cv_friendly_stddef=yes,
635 libc_cv_friendly_stddef=no)])
636 if test $libc_cv_friendly_stddef = yes; then
637 config_vars="$config_vars
638 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
641 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
642 libc_cv_need_minus_P, [dnl
643 cat > conftest.S <<EOF
644 #include "confdefs.h"
645 /* Nothing whatsoever. */
647 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
648 libc_cv_need_minus_P=no
650 libc_cv_need_minus_P=yes
653 if test $libc_cv_need_minus_P = yes; then
654 config_vars="$config_vars
655 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
658 AC_CACHE_CHECK(for assembler global-symbol directive,
659 libc_cv_asm_global_directive, [dnl
660 libc_cv_asm_global_directive=UNKNOWN
661 for ac_globl in .globl .global .EXPORT; do
662 cat > conftest.s <<EOF
667 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
668 libc_cv_asm_global_directive=${ac_globl}
671 test $libc_cv_asm_global_directive != UNKNOWN && break
673 if test $libc_cv_asm_global_directive = UNKNOWN; then
674 AC_MSG_ERROR(cannot determine asm global directive)
676 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
679 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
680 cat > conftest.s <<EOF
683 .set glibc_conftest_frobozz,foo
684 $libc_cv_asm_global_directive glibc_conftest_frobozz
686 # The alpha-dec-osf1 assembler gives only a warning for `.set'
687 # (but it doesn't work), so we must do a linking check to be sure.
688 cat > conftest1.c <<\EOF
689 extern int glibc_conftest_frobozz;
690 main () { printf ("%d\n", glibc_conftest_frobozz); }
692 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
693 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
694 libc_cv_asm_set_directive=yes
696 libc_cv_asm_set_directive=no
699 if test $libc_cv_asm_set_directive = yes; then
700 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
703 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
704 [cat > conftest.s <<EOF
707 .symver _sym,sym@VERS
709 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
710 libc_cv_asm_symver_directive=yes
712 libc_cv_asm_symver_directive=no
715 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
716 if test $libc_cv_asm_symver_directive = yes; then
717 cat > conftest.s <<EOF
720 .symver _sym,sym@VERS
722 cat > conftest.map <<EOF
731 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
732 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
733 -nostartfiles -nostdlib
734 -Wl,--version-script,conftest.map
737 libc_cv_ld_version_script_option=yes
739 libc_cv_ld_version_script_option=no
742 libc_cv_ld_version_script_option=no
745 libc_cv_ld_version_script_option=no
748 if test $libc_cv_asm_symver_directive = yes &&
749 test $libc_cv_ld_version_script_option = yes &&
750 test $enable_versioning = yes; then
752 AC_DEFINE(DO_VERSIONING)
758 if test $VERSIONING = no; then
760 *** WARNING: You should not compile GNU libc without versioning. Not using
761 *** versioning will introduce incompatibilities so that old binaries
762 *** will not run anymore.
763 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
765 if test $elf = yes; then
766 AC_CACHE_CHECK(for .previous assembler directive,
767 libc_cv_asm_previous_directive, [dnl
768 cat > conftest.s <<EOF
772 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
773 libc_cv_asm_previous_directive=yes
775 libc_cv_asm_previous_directive=no
778 if test $libc_cv_asm_previous_directive = yes; then
779 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
781 AC_CACHE_CHECK(for .popsection assembler directive,
782 libc_cv_asm_popsection_directive, [dnl
783 cat > conftest.s <<EOF
784 .pushsection foo_section
787 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
788 libc_cv_asm_popsection_directive=yes
790 libc_cv_asm_popsection_directive=no
793 if test $libc_cv_asm_popsection_directive = yes; then
794 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
799 if test $elf != yes; then
800 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
801 [AC_TRY_COMPILE(, [asm (".section .init");
802 asm (".section .fini");
804 libc_cv_have_initfini=yes,
805 libc_cv_have_initfini=no)])
806 AC_SUBST(libc_cv_have_initfini)dnl
807 if test $libc_cv_have_initfini = yes; then
808 AC_DEFINE(HAVE_INITFINI)
812 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
813 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
814 [cat > conftest.$ac_ext <<EOF
815 dnl This sometimes fails to find confdefs.h, for some reason.
816 dnl [#]line __oline__ "[$]0"
817 [#]line __oline__ "configure"
818 #include "confdefs.h"
819 void underscore_test(void) {
822 if AC_TRY_EVAL(ac_compile); then
823 if grep _underscore_test conftest* >/dev/null; then
824 ifelse([$1], , :, [rm -f conftest*
827 ifelse([$2], , , [rm -f conftest*
831 echo "configure: failed program was:" >&AC_FD_CC
832 cat conftest.$ac_ext >&AC_FD_CC
833 ifelse([$2], , , [rm -f conftest*
838 if test $elf = yes; then
839 libc_cv_asm_underscores=no
841 if test $ac_cv_prog_cc_works = yes; then
842 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
843 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
844 libc_cv_asm_underscores=yes,
845 libc_cv_asm_underscores=no)])
847 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
848 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
849 libc_cv_asm_underscores=no)])
852 if test $libc_cv_asm_underscores = no; then
853 AC_DEFINE(NO_UNDERSCORES)
856 if test $elf = yes; then
857 libc_cv_weak_symbols=yes
860 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
862 cat > conftest.s <<EOF
864 ${libc_cv_asm_global_directive} foo
869 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
870 libc_cv_asm_weak_directive=yes
872 libc_cv_asm_weak_directive=no
876 if test $libc_cv_asm_weak_directive = no; then
877 AC_CACHE_CHECK(for assembler .weakext directive,
878 libc_cv_asm_weakext_directive,
880 cat > conftest.s <<EOF
882 ${libc_cv_asm_global_directive} foo
886 ${libc_cv_asm_global_directive} baz
889 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
890 libc_cv_asm_weakext_directive=yes
892 libc_cv_asm_weakext_directive=no
898 if test $libc_cv_asm_weak_directive = yes; then
899 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
900 elif test $libc_cv_asm_weakext_directive = yes; then
901 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
904 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
905 cat > conftest.c <<\EOF
910 dnl No \ in command here because it ends up inside ''.
911 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
912 -nostdlib -nostartfiles -Wl,--no-whole-archive
913 -o conftest conftest.c 1>&AC_FD_CC]); then
914 libc_cv_ld_no_whole_archive=yes
916 libc_cv_ld_no_whole_archive=no
919 if test $libc_cv_ld_no_whole_archive = yes; then
920 no_whole_archive=-Wl,--no-whole-archive
922 AC_SUBST(no_whole_archive)dnl
924 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
925 cat > conftest.c <<\EOF
930 dnl No \ in command here because it ends up inside ''.
931 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
932 -nostdlib -nostartfiles -fexceptions
933 -o conftest conftest.c 1>&AC_FD_CC]); then
934 libc_cv_gcc_exceptions=yes
936 libc_cv_gcc_exceptions=no
939 if test $libc_cv_gcc_exceptions = yes; then
940 exceptions=-fexceptions
942 AC_SUBST(exceptions)dnl
944 if test "$base_machine" = alpha ; then
945 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
946 cat > conftest.c <<\EOF
950 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
952 libc_cv_gcc_alpha_ng_prefix=yes
954 libc_cv_gcc_alpha_ng_prefix=no
957 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
958 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
960 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
964 if test "$host_cpu" = powerpc ; then
965 # Check for a bug present in at least versions 2.8.x of GCC
966 # and versions 1.0.x of EGCS.
967 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
968 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
969 libc_cv_c_asmcr0_bug='no',
970 libc_cv_c_asmcr0_bug='yes')])
971 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
972 AC_DEFINE(BROKEN_PPC_ASM_CR0)
976 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
977 [cat > conftest.c <<EOF
978 #line __oline__ "configure"
979 static char __EH_FRAME_BEGIN__[];
982 #ifdef CHECK__register_frame
983 __register_frame (__EH_FRAME_BEGIN__);
984 __deregister_frame (__EH_FRAME_BEGIN__);
986 #ifdef CHECK__register_frame_info
987 __register_frame_info (__EH_FRAME_BEGIN__);
988 __deregister_frame_info (__EH_FRAME_BEGIN__);
993 /* FIXME: this is fragile. */
1003 dnl No \ in command here because it ends up inside ''.
1004 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1005 -nostdlib -nostartfiles
1006 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1007 libc_cv_gcc_dwarf2_unwind_info=static
1009 libc_cv_gcc_dwarf2_unwind_info=no
1011 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1012 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1013 -nostdlib -nostartfiles
1014 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1015 libc_cv_gcc_dwarf2_unwind_info=yes
1017 libc_cv_gcc_dwarf2_unwind_info=no
1021 case $libc_cv_gcc_dwarf2_unwind_info in
1023 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1026 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1027 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1031 dnl Check whether compiler understands __builtin_expect.
1032 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1033 [cat > conftest.c <<EOF
1034 #line __oline__ "configure"
1037 a = __builtin_expect (a, 10);
1038 return a == 10 ? 0 : 1;
1041 dnl No \ in command here because it ends up inside ''.
1042 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1043 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1044 libc_cv_gcc_builtin_expect=yes
1046 libc_cv_gcc_builtin_expect=no
1049 if test "$libc_cv_gcc_builtin_expect" = yes; then
1050 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1053 ### End of automated tests.
1054 ### Now run sysdeps configure fragments.
1056 # sysdeps configure fragments may set these with files to be linked below.
1060 # They also can set these variables.
1061 ldd_rewrite_script=no
1063 # Iterate over all the sysdep directories we will use, running their
1064 # configure fragments, and looking for a uname implementation.
1066 for dir in $sysnames; do
1069 *) dest=$srcdir/$dir ;;
1071 if test -r $dest/configure; then
1072 AC_MSG_RESULT(running configure fragment for $dest)
1076 if test -z "$uname"; then
1077 if test -r $dest/uname.c ||
1078 test -r $dest/uname.S ||
1079 { test -r $dest/syscalls.list &&
1080 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1087 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1089 # If we will use the generic uname implementation, we must figure out what
1090 # it will say by examining the system, and write the results in config-name.h.
1091 if test "$uname" = "sysdeps/generic"; then
1094 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1096 if test $uname_sysname != $config_os; then
1097 config_release=`echo $config_os | sed s/$uname_sysname//`
1100 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1101 if test -r /vmunix; then
1102 kernel_id=`strings /vmunix | grep UNIX`
1103 elif test -r /dynix; then
1104 kernel_id=`strings /dynix | grep DYNIX`
1110 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1111 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1113 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1115 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1116 != x$config_release; then
1117 # The configuration release is a substring of the kernel release.
1118 libc_cv_uname_release=$kernel_release
1119 elif test x$config_release != x; then
1120 libc_cv_uname_release=$config_release
1121 elif test x$kernel_release != x; then
1122 libc_cv_uname_release=$kernel_release
1124 libc_cv_uname_release=unknown
1126 uname_release="$libc_cv_uname_release"
1128 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1129 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1131 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1133 if test -n "$kernel_version"; then
1134 libc_cv_uname_version="$kernel_version"
1136 libc_cv_uname_version=unknown
1138 uname_version="$libc_cv_uname_version"
1140 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1141 config_uname=config-name.h:config-name.in
1143 # For non-generic uname, we don't need to create config-name.h at all.
1147 AC_MSG_CHECKING(stdio selection)
1150 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1151 default) stdio=stdio ;;
1153 AC_MSG_RESULT($stdio)
1155 # Test for old glibc 2.0.x headers so that they can be removed properly
1156 # Search only in includedir.
1157 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1158 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1160 old_glibc_headers=yes
1162 old_glibc_headers=no
1164 AC_MSG_RESULT($old_glibc_headers)
1165 if test ${old_glibc_headers} = yes; then
1166 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1167 AC_MSG_WARN(*** be removed.)
1169 AC_SUBST(old_glibc_headers)
1171 AC_SUBST(libc_cv_slibdir)
1172 AC_SUBST(libc_cv_sysconfdir)
1173 AC_SUBST(libc_cv_rootsbindir)
1175 AC_SUBST(has_ldconfig)
1176 AC_SUBST(ldd_rewrite_script)
1178 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1179 if test $gnu_ld = yes; then
1180 AC_DEFINE(HAVE_GNU_LD)
1182 if test $gnu_as = yes; then
1183 AC_DEFINE(HAVE_GNU_AS)
1185 if test $elf = yes; then
1191 if test $shared = default; then
1192 if test $gnu_ld = yes; then
1195 # For now we do not assume shared libs are available. In future more
1196 # tests might become available.
1201 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1203 cat > conftest.c <<EOF
1204 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1205 # error PIC is default.
1208 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1212 AC_SUBST(pic_default)
1217 AC_SUBST(static_nss)
1218 AC_SUBST(nopic_initfini)
1223 *door*) linux_doors=yes ;;
1224 *) linux_doors=no ;;
1226 AC_SUBST(linux_doors)
1228 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1231 config_makefile=Makefile
1234 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1235 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1239 echo '*** Do NOT install this release on any production system!'
1240 echo '*** It is known to be broken and will be so for quite some time.'
1241 echo '*** Use the latest released version instead.'
1243 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1244 case $CONFIG_FILES in *config.make*)
1245 echo "$config_vars" >> config.make;;
1247 test -d bits || mkdir bits], [config_vars='$config_vars'])