1 dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.11)dnl dnl Minimum Autoconf version required.
4 AC_INIT(include/features.h)
5 AC_CONFIG_HEADER(config.h)
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 AC_ARG_ENABLE(static, dnl
74 [ --enable-static build static library [default=yes]],
75 static=$enableval, static=yes)
76 AC_ARG_ENABLE(shared, dnl
77 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
78 shared=$enableval, shared=default)
79 AC_ARG_ENABLE(profile, dnl
80 [ --enable-profile build profiled library [default=yes]],
81 profile=$enableval, profile=yes)
82 AC_ARG_ENABLE(omitfp, dnl
83 [ --enable-omitfp build undebuggable optimized library [default=no]],
84 omitfp=$enableval, omitfp=no)
85 AC_ARG_ENABLE(bounded, dnl
86 [ --enable-bounded build with runtime bounds checking [default=no]],
87 bounded=$enableval, bounded=no)
88 AC_ARG_ENABLE(versioning, dnl
89 [ --disable-versioning do not include versioning information in the
90 library objects [default=yes if supported]],
91 enable_versioning=$enableval, enable_versioning=yes)
93 dnl Generic infrastructure for drop-in additions to libc.
94 AC_ARG_ENABLE(add-ons, dnl
95 [ --enable-add-ons[=DIR1,DIR2]...
96 configure and build add-ons in DIR1,DIR2,...
97 search for add-ons if no parameter given],
99 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
100 test "$add_ons" = "*" && add_ons= ;;
101 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
105 AC_CONFIG_SUBDIRS($add_ons)
107 if test x"$add_ons" != x; then
108 for f in $add_ons; do
109 # Test whether such a subdir really exists.
110 if test -d $srcdir/$f; then
111 add_ons_pfx="$add_ons_pfx $f/"
113 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
118 dnl On some platforms we cannot use dynamic loading. We must provide
119 dnl static NSS modules.
120 AC_ARG_ENABLE(static-nss, dnl
121 [ --enable-static-nss build static NSS modules [default=no]],
122 static_nss=$enableval, static_nss=no)
123 if test x"$static_nss" = xyes; then
124 AC_DEFINE(DO_STATIC_NSS)
127 AC_ARG_ENABLE(force-install,
128 [ --disable-force-install don't force installation of files from this package,
129 even if they are older than the installed files],
130 force_install=$enableval, force_install=yes)
131 AC_SUBST(force_install)
135 # The way shlib-versions is used to generate soversions.mk uses a
136 # fairly simplistic model for name recognition that can't distinguish
137 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
138 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
139 # tell. This doesn't get used much beyond that, so it's fairly safe.
144 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
148 # We keep the original values in `$config_*' and never modify them, so we
149 # can write them unchanged into config.make. Everything else uses
150 # $machine, $vendor, and $os, and changes them whenever convenient.
151 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
153 # Some configurations imply other options.
155 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
156 # These systems always use GNU tools.
157 gnu_ld=yes gnu_as=yes ;;
160 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
161 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
163 gnu* | linux* | sysv4* | solaris2* | irix6*)
164 # These systems (almost) always use the ELF format.
169 machine=$config_machine
170 vendor=$config_vendor
174 ### I put this here to prevent those annoying emails from people who cannot
175 ### read and try to compile glibc on unsupported platforms. --drepper
177 ### By using the undocumented --enable-hacker-mode option for configure
178 ### one can skip this test to make the configuration not fail for unsupported
181 if test -z "$enable_hacker_mode"; then
182 case "$machine-$host_os" in
183 *-linux* | *-gnu* | arm*-none*)
186 echo "*** The GNU C library is currently not available for this platform."
187 echo "*** So far nobody cared to port it and if there is no volunteer it"
188 echo "*** might never happen. So, if you have interest to see glibc on"
189 echo "*** this platform visit"
190 echo "*** http://www.gnu.org/software/libc/porting.html"
191 echo "*** and join the group of porters"
197 dnl We need to use [ and ] for other purposes for a while now.
199 # Expand the configuration machine name into a subdirectory by architecture
200 # type and particular chip.
202 a29k | am29000) base_machine=a29k machine=a29k ;;
203 alpha*) base_machine=alpha machine=alpha/$machine ;;
204 arm*) base_machine=arm machine=arm/$machine ;;
205 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
206 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
207 hppa*) base_machine=hppa machine=hppa/$machine ;;
208 i[3456]86) base_machine=i386 machine=i386/$machine ;;
209 m680?0) base_machine=m68k machine=m68k/$machine ;;
210 m68k) base_machine=m68k machine=m68k/m68020 ;;
211 m88???) base_machine=m88k machine=m88k/$machine ;;
212 m88k) base_machine=m88k machine=m88k/m88100 ;;
213 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
214 mips*) base_machine=mips
216 IP22) machine=mips/mips3 ;;
217 *) machine=mips/$machine ,,
220 base_machine=sparc machine=sparc/sparc32 ;;
221 sparcv8 | supersparc | hypersparc)
222 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
223 sparc64 | ultrasparc)
224 base_machine=sparc machine=sparc/sparc64 ;;
227 AC_SUBST(base_machine)
229 if test "$base_machine" = "i386"; then
230 AC_DEFINE(USE_REGPARMS)
233 # Compute the list of sysdep directories for this configuration.
234 # This can take a while to compute.
235 sysdep_dir=$srcdir/sysdeps
236 AC_MSG_CHECKING(sysdep dirs)
237 dnl We need to use [ and ] for other purposes for a while now.
239 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
240 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
245 netbsd* | 386bsd* | freebsd* | bsdi*)
246 base_os=unix/bsd/bsd4.4 ;;
247 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
249 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
252 base_os=unix/sysv/irix6/$os ;;
254 base_os=unix/sysv/sysv4 ;;
256 base_os=standalone ;;
261 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
264 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
268 o=`echo $tail | sed 's/[0-9]*$//'`
269 if test $o != $tail; then
272 # For linux-gnu, try linux-gnu, then linux.
273 o=`echo $tail | sed 's/-.*$//'`
274 if test $o != $tail; then
278 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
281 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
287 # For sparc/sparc9, try sparc/sparc9 and then sparc.
290 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
292 # Prepend the machine's FPU directory unless --without-fp.
293 if test "$with_fp" = yes; then
300 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
303 # Find what sysdep directories exist.
305 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
306 for d in $add_ons_pfx ''; do
307 for b in $base ''; do
308 for m0 in $mach ''; do
309 for v in /$vendor ''; do
310 test "$v" = / && continue
311 for o in /$ostry ''; do
312 test "$o" = / && continue
313 for m in $mach ''; do
314 if test "$m0$b$v$o$m"; then
315 try="${d}sysdeps$m0$b$v$o$m"
316 test -n "$enable_debug_configure" &&
317 echo "$0 [DEBUG]: try $try" >&2
318 if test -d $srcdir/$try; then
319 sysnames="$sysnames $try"
320 { test -n "$o" || test -n "$b"; } && os_used=t
321 { test -n "$m" || test -n "$m0"; } && machine_used=t
332 if test -z "$os_used" && test "$os" != none; then
333 AC_MSG_ERROR(Operating system $os is not supported.)
335 if test -z "$machine_used" && test "$machine" != none; then
336 AC_MSG_ERROR(The $machine is not supported.)
339 # We have now validated the configuration.
342 # If using ELF, look for an `elf' subdirectory of each machine directory.
343 # We prepend these rather than inserting them whereever the machine appears
344 # because things specified by the machine's ELF ABI should override
345 # OS-specific things, and should always be the same for any OS on the
346 # machine (otherwise what's the point of an ABI?).
347 if test "$elf" = yes; then
349 for d in $add_ons_pfx ''; do
351 if test -d $srcdir/${d}sysdeps$m/elf; then
352 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
356 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
360 # Expand the list of system names into a full list of directories
361 # from each element's parent name and Implies file (if present).
364 while test $# -gt 0; do
368 case " $names " in *" $name "*)
369 # Already in the list.
373 # Report each name as we discover it, so there is no long pause in output.
374 echo $ac_n "$name $ac_c" >&AC_FD_MSG
376 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
380 *) xsrcdir=$srcdir/ ;;
382 test -n "$enable_debug_configure" &&
383 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
385 if test -f $xsrcdir$name/Implies; then
386 # Collect more names from the `Implies' file (removing comments).
387 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
389 for x in $implied_candidate; do
390 if test -d $xsrcdir$name_base/$x; then
391 implied="$implied $name_base/$x";
393 AC_MSG_WARN($name/Implies specifies nonexistent $x)
400 # Add NAME to the list of names.
403 # Find the parent of NAME, using the empty string if it has none.
405 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
408 # Add the names implied by NAME, and NAME's parent (if it has one), to
409 # the list of names to be processed (the argument list). We prepend the
410 # implied names to the list and append the parent. We want implied
411 # directories to come before further directories inferred from the
412 # configuration components; this ensures that for sysv4, unix/common
413 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
415 sysnames="`echo $implied $* $parent`"
416 test -n "$sysnames" && set $sysnames
419 # Add the default directories.
420 default_sysnames=sysdeps/generic
421 if test "$elf" = yes; then
422 default_sysnames="sysdeps/generic/elf $default_sysnames"
424 sysnames="$names $default_sysnames"
426 # The other names were emitted during the scan.
427 AC_MSG_RESULT($default_sysnames)
433 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
434 # The makefiles need to use a different form to find it in $srcdir.
435 INSTALL='\$(..)./install-sh -c'
439 # These programs are version sensitive.
440 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
441 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
442 [version \([egcygnustp-]*[0-9.]*\)],
443 [egcs-2.9[1-9].*|egcs-2.90.2[789]|egcs-2.90.[3-9][0-9]|pgcc-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].*],
445 AC_CHECK_PROG_VER(MAKE, make gmake, --version,
446 [version \([0-9][0-9.]*\), by],
447 [3.75 | 3.76.[1-9]* | 3.7[789]* | 3.[89]*], critic_missing=t)
449 AC_CHECK_PROG_VER(MSGFMT, msgfmt gmsgfmt, --version,
450 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
451 [0.[1-9][0-9].* | [1-9].*], MSGFMT=: aux_missing=t)
452 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
453 [GNU texinfo \([0-9][0-9.]*\)],
454 [3.1[1-9] | 3.[2-9][0-9]], MAKEINFO=: aux_missing=t)
456 if test -n "$critic_missing"; then
458 *** Some critical program is missing or too old.
459 *** Check the INSTALL file for required versions.])
462 test -n "$aux_missing" && AC_MSG_WARN([
463 *** An auxiliary program is missing or too old;
464 *** some features will be disabled.
465 *** Check the INSTALL file for required versions.])
469 if test $host != $build; then
470 AC_CHECK_PROGS(BUILD_CC, gcc cc)
472 AC_SUBST(cross_compiling)
475 AC_CHECK_TOOL(AR, ar)
476 AC_CHECK_TOOL(RANLIB, ranlib, :)
477 AC_CHECK_TOOL(MIG, mig)
479 # if using special system headers, find out the compiler's sekrit
480 # header directory and add that to the list. NOTE: Only does the right
481 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
482 if test -n "$sysheaders"; then
483 ccheaders=`$CC -print-file-name=include`
484 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
486 AC_SUBST(SYSINCLUDES)
488 # check if ranlib is necessary
489 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
490 cat > conftest.c <<EOF
495 $CC $CFLAGS -c conftest.c
496 $AR cr conftest.a conftest.c
497 cp conftest.a conftest2.a
499 if cmp -s conftest.a conftest2.a; then
500 libc_cv_ranlib_necessary=no
502 libc_cv_ranlib_necessary=yes
505 if test "$libc_cv_ranlib_necessary" = no; then
509 # Test if LD_LIBRARY_PATH contains the notation for the current directory
510 # since this would lead to problems installing/building glibc.
511 # LD_LIBRARY_PATH contains the current directory if one of the following
513 # - one of the terminals (":" and ";") is the first or last sign
514 # - two terminals occur directly after each other
515 # - the path contains an element with a dot in it
516 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
518 case ${LD_LIBRARY_PATH} in
519 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
520 ld_library_path_setting="contains current directory"
523 ld_library_path_setting="ok"
527 AC_MSG_RESULT($ld_library_path_setting)
528 if test "$ld_library_path_setting" != "ok"; then
530 *** LD_LIBRARY_PATH shouldn't contain the current directory when
531 *** building glibc. Please change the environment variable
532 *** and run configure again.])
535 AC_PATH_PROG(BASH, bash, no)
536 if test "$BASH" != no &&
537 $BASH -c 'test "$BASH_VERSINFO" \
538 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
539 libc_cv_have_bash2=yes
541 libc_cv_have_bash2=no
543 AC_SUBST(libc_cv_have_bash2)
545 dnl We need a ksh compatible shell for tzselect.
546 if test "$BASH" = no; then
547 AC_PATH_PROG(KSH, ksh, no)
548 if test "$KSH" = no; then
558 AC_SUBST(libc_cv_have_ksh)
561 AC_PATH_PROGS(PERL, perl, no)
564 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
565 echo '#include <stddef.h>
566 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
567 if eval "$ac_cpp conftest.c 2>/dev/null" \
568 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
569 libc_cv_signed_size_t=no
571 libc_cv_signed_size_t=yes
574 if test $libc_cv_signed_size_t = yes; then
575 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
576 cat >> confdefs.h <<\EOF
578 #define __SIZE_TYPE__ unsigned
582 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
584 [#define __need_size_t
585 #define __need_wchar_t
588 #include <stddef.h>], [size_t size; wchar_t wchar;
590 #error stddef.h ignored __need_*
592 if (&size == NULL || &wchar == NULL) abort ();],
593 libc_cv_friendly_stddef=yes,
594 libc_cv_friendly_stddef=no)])
595 if test $libc_cv_friendly_stddef = yes; then
596 config_vars="$config_vars
597 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
600 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
601 libc_cv_need_minus_P, [dnl
602 cat > conftest.S <<EOF
603 #include "confdefs.h"
604 /* Nothing whatsoever. */
606 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
607 libc_cv_need_minus_P=no
609 libc_cv_need_minus_P=yes
612 if test $libc_cv_need_minus_P = yes; then
613 config_vars="$config_vars
614 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
617 AC_CACHE_CHECK(for assembler global-symbol directive,
618 libc_cv_asm_global_directive, [dnl
619 libc_cv_asm_global_directive=UNKNOWN
620 for ac_globl in .globl .global; do
621 cat > conftest.s <<EOF
626 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
627 libc_cv_asm_global_directive=${ac_globl}
630 test $libc_cv_asm_global_directive != UNKNOWN && break
632 if test $libc_cv_asm_global_directive = UNKNOWN; then
633 AC_MSG_ERROR(cannot determine asm global directive)
635 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
638 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
639 cat > conftest.s <<EOF
642 .set glibc_conftest_frobozz,foo
643 $libc_cv_asm_global_directive glibc_conftest_frobozz
645 # The alpha-dec-osf1 assembler gives only a warning for `.set'
646 # (but it doesn't work), so we must do a linking check to be sure.
647 cat > conftest1.c <<\EOF
648 extern int glibc_conftest_frobozz;
649 main () { printf ("%d\n", glibc_conftest_frobozz); }
651 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
652 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
653 libc_cv_asm_set_directive=yes
655 libc_cv_asm_set_directive=no
658 if test $libc_cv_asm_set_directive = yes; then
659 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
662 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
663 [cat > conftest.s <<EOF
666 .symver _sym,sym@VERS
668 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
669 libc_cv_asm_symver_directive=yes
671 libc_cv_asm_symver_directive=no
674 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
675 if test $libc_cv_asm_symver_directive = yes; then
676 cat > conftest.s <<EOF
679 .symver _sym,sym@VERS
681 cat > conftest.map <<EOF
690 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
691 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
692 -nostartfiles -nostdlib
693 -Wl,--version-script,conftest.map
696 libc_cv_ld_version_script_option=yes
698 libc_cv_ld_version_script_option=no
701 libc_cv_ld_version_script_option=no
704 libc_cv_ld_version_script_option=no
707 if test $libc_cv_asm_symver_directive = yes &&
708 test $libc_cv_ld_version_script_option = yes &&
709 test $enable_versioning = yes; then
711 AC_DEFINE(DO_VERSIONING)
717 if test $VERSIONING = no; then
719 *** WARNING: You should not compile GNU libc without versioning. Not using
720 *** versioning will introduce incompatibilities so that old binaries
721 *** will not run anymore.
722 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
724 if test $elf = yes; then
725 AC_CACHE_CHECK(for .previous assembler directive,
726 libc_cv_asm_previous_directive, [dnl
727 cat > conftest.s <<EOF
731 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
732 libc_cv_asm_previous_directive=yes
734 libc_cv_asm_previous_directive=no
737 if test $libc_cv_asm_previous_directive = yes; then
738 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
740 AC_CACHE_CHECK(for .popsection assembler directive,
741 libc_cv_asm_popsection_directive, [dnl
742 cat > conftest.s <<EOF
743 .pushsection foo_section
746 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
747 libc_cv_asm_popsection_directive=yes
749 libc_cv_asm_popsection_directive=no
752 if test $libc_cv_asm_popsection_directive = yes; then
753 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
758 if test $elf != yes; then
759 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
760 [AC_TRY_COMPILE(, [asm (".section .init");
761 asm (".section .fini");
763 libc_cv_have_initfini=yes,
764 libc_cv_have_initfini=no)])
765 AC_SUBST(libc_cv_have_initfini)dnl
766 if test $libc_cv_have_initfini = yes; then
767 AC_DEFINE(HAVE_INITFINI)
771 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
772 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
773 [cat > conftest.$ac_ext <<EOF
774 dnl This sometimes fails to find confdefs.h, for some reason.
775 dnl [#]line __oline__ "[$]0"
776 [#]line __oline__ "configure"
777 #include "confdefs.h"
778 void underscore_test(void) {
781 if AC_TRY_EVAL(ac_compile); then
782 if grep _underscore_test conftest* >/dev/null; then
783 ifelse([$1], , :, [rm -f conftest*
786 ifelse([$2], , , [rm -f conftest*
790 echo "configure: failed program was:" >&AC_FD_CC
791 cat conftest.$ac_ext >&AC_FD_CC
792 ifelse([$2], , , [rm -f conftest*
797 if test $elf = yes; then
798 libc_cv_asm_underscores=no
800 if test $ac_cv_prog_cc_works = yes; then
801 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
802 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
803 libc_cv_asm_underscores=yes,
804 libc_cv_asm_underscores=no)])
806 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
807 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
808 libc_cv_asm_underscores=no)])
811 if test $libc_cv_asm_underscores = no; then
812 AC_DEFINE(NO_UNDERSCORES)
815 if test $elf = yes; then
816 libc_cv_weak_symbols=yes
819 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
821 cat > conftest.s <<EOF
823 ${libc_cv_asm_global_directive} foo
828 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
829 libc_cv_asm_weak_directive=yes
831 libc_cv_asm_weak_directive=no
835 if test $libc_cv_asm_weak_directive = no; then
836 AC_CACHE_CHECK(for assembler .weakext directive,
837 libc_cv_asm_weakext_directive,
839 cat > conftest.s <<EOF
841 ${libc_cv_asm_global_directive} foo
845 ${libc_cv_asm_global_directive} baz
848 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
849 libc_cv_asm_weakext_directive=yes
851 libc_cv_asm_weakext_directive=no
857 if test $libc_cv_asm_weak_directive = yes; then
858 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
859 elif test $libc_cv_asm_weakext_directive = yes; then
860 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
863 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
864 cat > conftest.c <<\EOF
869 dnl No \ in command here because it ends up inside ''.
870 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
871 -nostdlib -nostartfiles -Wl,--no-whole-archive
872 -o conftest conftest.c 1>&AC_FD_CC]); then
873 libc_cv_ld_no_whole_archive=yes
875 libc_cv_ld_no_whole_archive=no
878 if test $libc_cv_ld_no_whole_archive = yes; then
879 no_whole_archive=-Wl,--no-whole-archive
881 AC_SUBST(no_whole_archive)dnl
883 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
884 cat > conftest.c <<\EOF
889 dnl No \ in command here because it ends up inside ''.
890 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
891 -nostdlib -nostartfiles -fexceptions
892 -o conftest conftest.c 1>&AC_FD_CC]); then
893 libc_cv_gcc_exceptions=yes
895 libc_cv_gcc_exceptions=no
898 if test $libc_cv_gcc_exceptions = yes; then
899 exceptions=-fexceptions
901 AC_SUBST(exceptions)dnl
903 if test "$base_machine" = alpha ; then
904 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
905 cat > conftest.c <<\EOF
909 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
911 libc_cv_gcc_alpha_ng_prefix=yes
913 libc_cv_gcc_alpha_ng_prefix=no
916 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
917 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
919 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
923 if test "$host_cpu" = powerpc ; then
924 # Check for a bug present in at least versions 2.8.x of GCC
925 # and versions 1.0.x of EGCS.
926 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
927 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
928 libc_cv_c_asmcr0_bug='no',
929 libc_cv_c_asmcr0_bug='yes')])
930 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
931 AC_DEFINE(BROKEN_PPC_ASM_CR0)
935 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
936 [cat > conftest.c <<EOF
937 #line __oline__ "configure"
938 static char __EH_FRAME_BEGIN__[];
941 #ifdef CHECK__register_frame
942 __register_frame (__EH_FRAME_BEGIN__);
943 __deregister_frame (__EH_FRAME_BEGIN__);
945 #ifdef CHECK__register_frame_info
946 __register_frame_info (__EH_FRAME_BEGIN__);
947 __deregister_frame_info (__EH_FRAME_BEGIN__);
952 /* FIXME: this is fragile. */
962 dnl No \ in command here because it ends up inside ''.
963 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
964 -nostdlib -nostartfiles
965 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
966 libc_cv_gcc_dwarf2_unwind_info=static
968 libc_cv_gcc_dwarf2_unwind_info=no
970 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
971 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
972 -nostdlib -nostartfiles
973 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
974 libc_cv_gcc_dwarf2_unwind_info=yes
976 libc_cv_gcc_dwarf2_unwind_info=no
980 case $libc_cv_gcc_dwarf2_unwind_info in
982 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
985 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
986 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
990 ### End of automated tests.
991 ### Now run sysdeps configure fragments.
993 # sysdeps configure fragments may set these with files to be linked below.
997 # They also can set these variables.
998 ldd_rewrite_script=no
1000 # Iterate over all the sysdep directories we will use, running their
1001 # configure fragments, and looking for a uname implementation.
1003 for dir in $sysnames; do
1006 *) dest=$srcdir/$dir ;;
1008 if test -r $dest/configure; then
1009 AC_MSG_RESULT(running configure fragment for $dest)
1013 if test -z "$uname"; then
1014 if test -r $dest/uname.c ||
1015 test -r $dest/uname.S ||
1016 { test -r $dest/syscalls.list &&
1017 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1024 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1026 # If we will use the generic uname implementation, we must figure out what
1027 # it will say by examining the system, and write the results in config-name.h.
1028 if test "$uname" = "sysdeps/generic"; then
1031 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1033 if test $uname_sysname != $config_os; then
1034 config_release=`echo $config_os | sed s/$uname_sysname//`
1037 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1038 if test -r /vmunix; then
1039 kernel_id=`strings /vmunix | grep UNIX`
1040 elif test -r /dynix; then
1041 kernel_id=`strings /dynix | grep DYNIX`
1047 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1048 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1050 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1052 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1053 != x$config_release; then
1054 # The configuration release is a substring of the kernel release.
1055 libc_cv_uname_release=$kernel_release
1056 elif test x$config_release != x; then
1057 libc_cv_uname_release=$config_release
1058 elif test x$kernel_release != x; then
1059 libc_cv_uname_release=$kernel_release
1061 libc_cv_uname_release=unknown
1063 uname_release="$libc_cv_uname_release"
1065 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1066 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1068 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1070 if test -n "$kernel_version"; then
1071 libc_cv_uname_version="$kernel_version"
1073 libc_cv_uname_version=unknown
1075 uname_version="$libc_cv_uname_version"
1077 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1078 config_uname=config-name.h:config-name.in
1080 # For non-generic uname, we don't need to create config-name.h at all.
1084 AC_MSG_CHECKING(stdio selection)
1087 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1088 default) stdio=stdio ;;
1090 AC_MSG_RESULT($stdio)
1092 # Test for old glibc 2.0.x headers so that they can be removed properly
1093 # Search only in includedir.
1094 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1095 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1097 old_glibc_headers=yes
1099 old_glibc_headers=no
1101 AC_MSG_RESULT($old_glibc_headers)
1102 if test ${old_glibc_headers} = yes; then
1103 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1104 AC_MSG_WARN(*** be removed.)
1106 AC_SUBST(old_glibc_headers)
1108 AC_SUBST(libc_cv_slibdir)
1109 AC_SUBST(libc_cv_sysconfdir)
1110 AC_SUBST(libc_cv_rootsbindir)
1112 AC_SUBST(has_ldconfig)
1113 AC_SUBST(ldd_rewrite_script)
1115 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1116 if test $gnu_ld = yes; then
1117 AC_DEFINE(HAVE_GNU_LD)
1119 if test $gnu_as = yes; then
1120 AC_DEFINE(HAVE_GNU_AS)
1122 if test $elf = yes; then
1128 if test $shared = default; then
1129 if test $gnu_ld = yes; then
1132 # For now we do not assume shared libs are available. In future more
1133 # tests might become available.
1138 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1140 cat > conftest.c <<EOF
1141 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1142 # error PIC is default.
1145 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1149 AC_SUBST(pic_default)
1154 AC_SUBST(static_nss)
1155 AC_SUBST(nopic_initfini)
1160 *door*) linux_doors=yes ;;
1161 *) linux_doors=no ;;
1163 AC_SUBST(linux_doors)
1165 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1168 config_makefile=Makefile
1171 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1172 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1176 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1177 case $CONFIG_FILES in *config.make*)
1178 echo "$config_vars" >> config.make;;
1180 test -d bits || mkdir bits], [config_vars='$config_vars'])