1 dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.11)dnl dnl Minimum Autoconf version required.
4 AC_INIT(include/features.h)
5 AC_CONFIG_HEADER(config.h)
7 # This will get text that should go into config.make.
10 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
12 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
15 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
17 *) config_vars="$config_vars
18 gmp-srcdir = $withval" ;;
21 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
22 AC_ARG_WITH(gettext, dnl
23 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
25 case "$with_gettext" in
27 AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
30 config_vars="$config_vars
31 gettext-srcdir = $withval" ;;
35 dnl Arguments to specify presence of other packages/features.
37 [ --with-fp if using floating-point hardware [default=yes]],
38 with_fp=$withval, with_fp=yes)
39 AC_ARG_WITH(binutils, dnl
40 --with-binutils=PATH specify location of binutils (as and ld),
41 path_binutils=$withval, path_binutils='')
43 --with-elf if using the ELF object format,
46 [ --without-cvs if CVS should not be used],
47 with_cvs=$withval, with_cvs=yes)
50 AC_ARG_ENABLE(libio, dnl
51 [ --enable-libio build in GNU libio instead of GNU stdio],
52 [if test $enableval = yes; then
59 AC_ARG_ENABLE(sanity-checks, dnl
60 [ --disable-sanity-checks really do not use threads (should not be used
61 except in special situations) [default=yes]],
62 enable_sanity=$enableval, enable_sanity=yes)
64 dnl Arguments to enable or disable building the static, shared, profiled,
65 dnl and -fomit-frame-pointer libraries.
66 AC_ARG_ENABLE(static, dnl
67 [ --enable-static build static library [default=yes]],
68 static=$enableval, static=yes)
69 AC_ARG_ENABLE(shared, dnl
70 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
71 shared=$enableval, shared=default)
72 AC_ARG_ENABLE(profile, dnl
73 [ --enable-profile build profiled library [default=yes]],
74 profile=$enableval, profile=yes)
75 AC_ARG_ENABLE(omitfp, dnl
76 [ --enable-omitfp build undebuggable optimized library [default=no]],
77 omitfp=$enableval, omitfp=no)
78 AC_ARG_ENABLE(bounded, dnl
79 [ --enable-bounded build with runtime bounds checking [default=no]],
80 bounded=$enableval, bounded=no)
81 AC_ARG_ENABLE(versioning, dnl
82 [ --disable-versioning do not include versioning information in the
83 library objects [default=yes if supported]],
84 enable_versioning=$enableval, enable_versioning=yes)
86 dnl Generic infrastructure for drop-in additions to libc.
87 AC_ARG_ENABLE(add-ons, dnl
88 [ --enable-add-ons[=DIR1,DIR2]... configure and build add-ons in DIR1,DIR2,...
89 search for add-ons if no parameter given],
91 yes) if test "$srcdir" = "."; then
92 add_ons=`echo */configure | sed -e 's!/configure!!g'`
94 add_ons=`echo $srcdir/*/configure | \
95 sed -e 's!/configure!!g' -e "s!$srcdir/!!g"`
97 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
101 AC_CONFIG_SUBDIRS($add_ons)
103 if test x"$add_ons" != x; then
104 for f in $add_ons; do
105 # Test whether such a subdir really exists.
106 if test -d $srcdir/$f; then
107 add_ons_pfx="$add_ons_pfx $f/"
109 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
114 dnl On some platforms we cannot use dynamic loading. We must provide
115 dnl static NSS modules.
116 AC_ARG_ENABLE(static-nss, dnl
117 [ --enable-static-nss build static NSS modules [default=no]],
118 static_nss=$enableval, static_nss=no)
119 if test x"$static_nss" = xyes; then
120 AC_DEFINE(DO_STATIC_NSS)
125 # The way shlib-versions is used to generate soversions.mk uses a
126 # fairly simplistic model for name recognition that can't distinguish
127 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
128 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
129 # tell. This doesn't get used much beyond that, so it's fairly safe.
134 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
139 ### I put this here to prevent those annoying emails from people who cannot
140 ### read and try to compile glibc on unsupported platforms. --drepper
142 ### By using the undocumented --enable-hacker-mode option for configure
143 ### one can skip this test to make the configuration not fail for unsupported
146 if test -z "$enable_hacker_mode"; then
147 case "$machine-$host_os" in
148 *-linux* | *-gnu* | arm*-none*)
151 echo "*** The GNU C library is currently not available for this platform."
152 echo "*** So far nobody cared to port it and if there is no volunteer it"
153 echo "*** might never happen. So, if you have interest to see glibc on"
154 echo "*** this platform visit"
155 echo "*** http://www.gnu.org/software/libc/porting.html"
156 echo "*** and join the group of porters"
162 # We keep the original values in `$config_*' and never modify them, so we
163 # can write them unchanged into config.make. Everything else uses
164 # $machine, $vendor, and $os, and changes them whenever convenient.
165 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
167 # Some configurations imply other options.
169 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
170 # These systems always use GNU tools.
171 gnu_ld=yes gnu_as=yes ;;
174 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
175 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
177 gnu* | linux* | sysv4* | solaris2* | irix6*)
178 # These systems (almost) always use the ELF format.
183 machine=$config_machine
184 vendor=$config_vendor
187 dnl We need to use [ and ] for other purposes for a while now.
189 # Expand the configuration machine name into a subdirectory by architecture
190 # type and particular chip.
192 a29k | am29000) base_machine=a29k machine=a29k ;;
193 alpha*) base_machine=alpha machine=alpha/$machine ;;
194 arm*) base_machine=arm machine=arm/$machine ;;
195 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
196 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
197 hppa*) base_machine=hppa machine=hppa/$machine ;;
198 i[3456]86) base_machine=i386 machine=i386/$machine ;;
199 m680?0) base_machine=m68k machine=m68k/$machine ;;
200 m68k) base_machine=m68k machine=m68k/m68020 ;;
201 m88???) base_machine=m88k machine=m88k/$machine ;;
202 m88k) base_machine=m88k machine=m88k/m88100 ;;
203 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
204 mips*) base_machine=mips
206 IP22) machine=mips/mips3 ;;
207 *) machine=mips/$machine ,,
210 base_machine=sparc machine=sparc/sparc32 ;;
211 sparcv8 | supersparc | hypersparc)
212 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
213 sparc64 | ultrasparc)
214 base_machine=sparc machine=sparc/sparc64 ;;
217 AC_SUBST(base_machine)
219 if test "$base_machine" = "i386"; then
220 AC_DEFINE(USE_REGPARMS)
223 # Compute the list of sysdep directories for this configuration.
224 # This can take a while to compute.
225 sysdep_dir=$srcdir/sysdeps
226 AC_MSG_CHECKING(sysdep dirs)
227 dnl We need to use [ and ] for other purposes for a while now.
229 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
230 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
235 netbsd* | 386bsd* | freebsd* | bsdi*)
236 base_os=unix/bsd/bsd4.4 ;;
237 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
239 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
242 base_os=unix/sysv/irix6/$os ;;
244 base_os=unix/sysv/sysv4 ;;
246 base_os=standalone ;;
251 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
254 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
258 o=`echo $tail | sed 's/[0-9]*$//'`
259 if test $o != $tail; then
262 # For linux-gnu, try linux-gnu, then linux.
263 o=`echo $tail | sed 's/-.*$//'`
264 if test $o != $tail; then
268 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
271 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
277 # For sparc/sparc9, try sparc/sparc9 and then sparc.
280 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
282 # Prepend the machine's FPU directory unless --without-fp.
283 if test "$with_fp" = yes; then
290 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
293 # Find what sysdep directories exist.
295 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
296 for d in $add_ons_pfx ''; do
297 for b in $base ''; do
298 for m0 in $mach ''; do
299 for v in /$vendor ''; do
300 test "$v" = / && continue
301 for o in /$ostry ''; do
302 test "$o" = / && continue
303 for m in $mach ''; do
304 if test "$m0$b$v$o$m"; then
305 try="${d}sysdeps$m0$b$v$o$m"
306 test -n "$enable_debug_configure" &&
307 echo "$0 [DEBUG]: try $try" >&2
310 *) dest=$srcdir/$try ;;
312 if test -d $dest; then
313 sysnames="$sysnames $try"
314 { test -n "$o" || test -n "$b"; } && os_used=t
315 { test -n "$m" || test -n "$m0"; } && machine_used=t
326 if test -z "$os_used" && test "$os" != none; then
327 AC_MSG_ERROR(Operating system $os is not supported.)
329 if test -z "$machine_used" && test "$machine" != none; then
330 AC_MSG_ERROR(The $machine is not supported.)
333 # We have now validated the configuration.
336 # If using ELF, look for an `elf' subdirectory of each machine directory.
337 # We prepend these rather than inserting them whereever the machine appears
338 # because things specified by the machine's ELF ABI should override
339 # OS-specific things, and should always be the same for any OS on the
340 # machine (otherwise what's the point of an ABI?).
341 if test "$elf" = yes; then
343 for d in $add_ons_pfx ''; do
346 *) xsrcdir=$srcdir/ ;;
349 if test -d $xsrcdir${d}sysdeps$m/elf; then
350 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
354 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
358 # Expand the list of system names into a full list of directories
359 # from each element's parent name and Implies file (if present).
362 while test $# -gt 0; do
366 case " $names " in *" $name "*)
367 # Already in the list.
371 # Report each name as we discover it, so there is no long pause in output.
372 echo $ac_n "$name $ac_c" >&AC_FD_MSG
374 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
378 *) xsrcdir=$srcdir/ ;;
380 test -n "$enable_debug_configure" &&
381 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
383 if test -f $xsrcdir$name/Implies; then
384 # Collect more names from the `Implies' file (removing comments).
385 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
387 for x in $implied_candidate; do
388 if test -d $xsrcdir$name_base/$x; then
389 implied="$implied $name_base/$x";
391 AC_MSG_WARN($name/Implies specifies nonexistent $x)
398 # Add NAME to the list of names.
401 # Find the parent of NAME, using the empty string if it has none.
403 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
406 # Add the names implied by NAME, and NAME's parent (if it has one), to
407 # the list of names to be processed (the argument list). We prepend the
408 # implied names to the list and append the parent. We want implied
409 # directories to come before further directories inferred from the
410 # configuration components; this ensures that for sysv4, unix/common
411 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
413 sysnames="`echo $implied $* $parent`"
414 test -n "$sysnames" && set $sysnames
417 # Add the default directories.
418 sysnames="$names sysdeps/generic"
420 # The other names were emitted during the scan.
421 AC_MSG_RESULT(sysdeps/generic)
427 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
428 # The makefiles need to use a different form to find it in $srcdir.
429 INSTALL='\$(..)./install-sh -c'
432 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
433 if test "$MSGFMT" != ":"; then
434 changequote(,)dnl Need [] for regexps.
435 if $MSGFMT --version 2>&1 | grep 'GNU gettext.*0\.[1-9][0-9]' >/dev/null 2>&1
437 then : # msgfmt from gettext 0.10 or greater, works.
440 *** (g)msgfmt is too old or wrong version (need gettext 0.10 or better).])
445 AC_CHECK_PROG(MAKEINFO, makeinfo, makeinfo)
446 if test "$MAKEINFO"; then
447 changequote(,)dnl Need [] for regexps.
448 if $MAKEINFO --version | grep 'texinfo 3\.[1-9][1-9]' >/dev/null 2>&1
450 then : # Makeinfo 3.11 or greater, works.
453 *** makeinfo is too old (need version 3.11 or better).
454 *** You should install the needed version and re-configure since otherwise
455 *** you won't get the info pages installed.])
462 if test $host != $build; then
463 AC_CHECK_PROGS(BUILD_CC, gcc cc)
465 AC_SUBST(cross_compiling)
468 AC_CHECK_TOOL(AR, ar)
469 AC_CHECK_TOOL(RANLIB, ranlib, :)
471 # check if ar takes S
472 AC_CACHE_CHECK(for ar S, libc_cv_ar_S, [dnl
477 if AC_TRY_COMMAND([${AR-ar} rcuS $tmplib $tmpo > /dev/null 2>&1]); then
482 rm -f $tmpo $tmplib])
483 AC_SUBST(libc_cv_ar_S)dnl
485 # check for recent compiler
486 AC_MSG_CHECKING(compiler version)
488 case `${CC-cc} -v 2>&1` in
489 *egcs-2.91.* | *egcs-1.0.[2-9]* | *egcs-1.1* | *2.8.[1-9]* | *2.9.[0-9]*)
493 cc_is_recent="too old"
497 AC_MSG_RESULT($cc_is_recent)
498 if test "$cc_is_recent" != "ok"; then
500 *** Your compiler is too old.
501 *** You need at least egcs 1.0.2 or GNU CC 2.8.1 to compile glibc.
505 # Test if LD_LIBRARY_PATH contains the notation for the current directory
506 # since this would lead to problems installing/building glibc.
507 # LD_LIBRARY_PATH contains the current directory if one of the following
509 # - one of the terminals (":" and ";") is the first or last sign
510 # - two terminals occur directly after each other
511 # - the path contains an element with a dot in it
512 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
514 case ${LD_LIBRARY_PATH} in
515 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
516 ld_library_path_setting="contains current directory"
519 ld_library_path_setting="ok"
523 AC_MSG_RESULT($ld_library_path_setting)
524 if test "$ld_library_path_setting" != "ok"; then
526 *** LD_LIBRARY_PATH shouldn't contain the current path when building glibc.
527 *** Please change the environment variable and run configure again.)
530 AC_PATH_PROG(BASH, bash, no)
531 if test "$BASH" != no &&
532 $BASH -c 'test "$BASH_VERSINFO" \
533 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
534 libc_cv_have_bash2=yes
536 libc_cv_have_bash2=no
538 AC_SUBST(libc_cv_have_bash2)
540 dnl We need a ksh compatible shell for tzselect.
541 if test "$BASH" = no; then
542 AC_PATH_PROG(KSH, ksh, no)
543 if test "$KSH" = no; then
553 AC_SUBST(libc_cv_have_ksh)
555 AC_PATH_PROGS(PERL, perl, no)
558 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
559 echo '#include <stddef.h>
560 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
561 if eval "$ac_cpp conftest.c 2>/dev/null" \
562 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
563 libc_cv_signed_size_t=no
565 libc_cv_signed_size_t=yes
568 if test $libc_cv_signed_size_t = yes; then
569 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
570 cat >> confdefs.h <<\EOF
572 #define __SIZE_TYPE__ unsigned
576 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
578 [#define __need_size_t
579 #define __need_wchar_t
582 #include <stddef.h>], [size_t size; wchar_t wchar;
584 #error stddef.h ignored __need_*
586 if (&size == NULL || &wchar == NULL) abort ();],
587 libc_cv_friendly_stddef=yes,
588 libc_cv_friendly_stddef=no)])
589 if test $libc_cv_friendly_stddef = yes; then
590 config_vars="$config_vars
591 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
594 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
595 libc_cv_need_minus_P, [dnl
596 cat > conftest.S <<EOF
597 #include "confdefs.h"
598 /* Nothing whatsoever. */
600 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
601 libc_cv_need_minus_P=no
603 libc_cv_need_minus_P=yes
606 if test $libc_cv_need_minus_P = yes; then
607 config_vars="$config_vars
608 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
611 # gcc 2.7.x has a bug where if -pipe is set, the assembler will always
612 # be told to read stdin. This causes the compiler to hang when fed an
614 if test $ac_cv_prog_gcc = yes; then
615 case `${CC-cc} -v 2>&1` in
617 # We must check this even if -pipe is not given here, because the user
618 # might do `make CFLAGS=-pipe'.
619 AC_CACHE_CHECK(for gcc 2.7.x -pipe bug, libc_cv_gcc_pipe_bug, [dnl
620 cp /dev/null conftest.s
621 cat >conftest1.s <<EOF
624 if ${CC-cc} -pipe -c conftest.s <conftest1.s 2>/dev/null; then
625 libc_cv_gcc_pipe_bug=no
627 libc_cv_gcc_pipe_bug=yes
630 if test $libc_cv_gcc_pipe_bug = yes; then
631 makeCC="${CC-cc} -B\$(common-objpfx)"
633 CFLAGS=`echo $CFLAGS |sed 's/-pipe//'`
635 *) libc_cv_gcc_pipe_bug=no;;
638 libc_cv_gcc_pipe_bug=no
641 AC_CACHE_CHECK(for assembler global-symbol directive,
642 libc_cv_asm_global_directive, [dnl
643 libc_cv_asm_global_directive=UNKNOWN
644 for ac_globl in .globl .global; do
645 cat > conftest.s <<EOF
650 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
651 libc_cv_asm_global_directive=${ac_globl}
654 test $libc_cv_asm_global_directive != UNKNOWN && break
656 if test $libc_cv_asm_global_directive = UNKNOWN; then
657 AC_MSG_ERROR(cannot determine asm global directive)
659 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
662 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
663 cat > conftest.s <<EOF
666 .set glibc_conftest_frobozz,foo
667 $libc_cv_asm_global_directive glibc_conftest_frobozz
669 # The alpha-dec-osf1 assembler gives only a warning for `.set'
670 # (but it doesn't work), so we must do a linking check to be sure.
671 cat > conftest1.c <<\EOF
672 extern int glibc_conftest_frobozz;
673 main () { printf ("%d\n", glibc_conftest_frobozz); }
675 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
676 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
677 libc_cv_asm_set_directive=yes
679 libc_cv_asm_set_directive=no
682 if test $libc_cv_asm_set_directive = yes; then
683 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
686 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
687 [cat > conftest.s <<EOF
690 .symver _sym,sym@VERS
692 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
693 libc_cv_asm_symver_directive=yes
695 libc_cv_asm_symver_directive=no
698 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
699 if test $libc_cv_asm_symver_directive = yes; then
700 cat > conftest.s <<EOF
703 .symver _sym,sym@VERS
705 cat > conftest.map <<EOF
714 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
715 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
716 -nostartfiles -nostdlib
717 -Wl,--version-script,conftest.map
720 libc_cv_ld_version_script_option=yes
722 libc_cv_ld_version_script_option=no
725 libc_cv_ld_version_script_option=no
728 libc_cv_ld_version_script_option=no
731 if test $libc_cv_asm_symver_directive = yes &&
732 test $libc_cv_ld_version_script_option = yes &&
733 test $enable_versioning = yes; then
735 AC_DEFINE(DO_VERSIONING)
741 if test $VERSIONING = no; then
743 *** WARNING: You should not compile GNU libc without versioning. Not using
744 *** versioning will introduce incompatibilities so that old binaries
745 *** will not run anymore.
746 *** For versioning you need recent binutils (binutils-2.8.1.0.17 or newer)."
748 if test $elf = yes; then
749 AC_CACHE_CHECK(for .previous assembler directive,
750 libc_cv_asm_previous_directive, [dnl
751 cat > conftest.s <<EOF
755 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
756 libc_cv_asm_previous_directive=yes
758 libc_cv_asm_previous_directive=no
761 if test $libc_cv_asm_previous_directive = yes; then
762 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
764 AC_CACHE_CHECK(for .popsection assembler directive,
765 libc_cv_asm_popsection_directive, [dnl
766 cat > conftest.s <<EOF
767 .pushsection foo_section
770 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
771 libc_cv_asm_popsection_directive=yes
773 libc_cv_asm_popsection_directive=no
776 if test $libc_cv_asm_popsection_directive = yes; then
777 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
782 if test $elf != yes; then
783 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
784 [AC_TRY_COMPILE(, [asm (".section .init");
785 asm (".section .fini");
787 libc_cv_have_initfini=yes,
788 libc_cv_have_initfini=no)])
789 AC_SUBST(libc_cv_have_initfini)dnl
790 if test $libc_cv_have_initfini = yes; then
791 AC_DEFINE(HAVE_INITFINI)
795 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
796 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
797 [cat > conftest.$ac_ext <<EOF
798 dnl This sometimes fails to find confdefs.h, for some reason.
799 dnl [#]line __oline__ "[$]0"
800 [#]line __oline__ "configure"
801 #include "confdefs.h"
802 void underscore_test(void) {
805 if AC_TRY_EVAL(ac_compile); then
806 if grep _underscore_test conftest* >/dev/null; then
807 ifelse([$1], , :, [rm -f conftest*
810 ifelse([$2], , , [rm -f conftest*
814 echo "configure: failed program was:" >&AC_FD_CC
815 cat conftest.$ac_ext >&AC_FD_CC
816 ifelse([$2], , , [rm -f conftest*
821 if test $elf = yes; then
822 libc_cv_asm_underscores=no
824 if test $ac_cv_prog_cc_works = yes; then
825 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
826 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
827 libc_cv_asm_underscores=yes,
828 libc_cv_asm_underscores=no)])
830 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
831 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
832 libc_cv_asm_underscores=no)])
835 if test $libc_cv_asm_underscores = no; then
836 AC_DEFINE(NO_UNDERSCORES)
839 if test $elf = yes; then
840 libc_cv_weak_symbols=yes
843 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
845 cat > conftest.s <<EOF
847 ${libc_cv_asm_global_directive} foo
852 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
853 libc_cv_asm_weak_directive=yes
855 libc_cv_asm_weak_directive=no
859 if test $libc_cv_asm_weak_directive = no; then
860 AC_CACHE_CHECK(for assembler .weakext directive,
861 libc_cv_asm_weakext_directive,
863 cat > conftest.s <<EOF
865 ${libc_cv_asm_global_directive} foo
869 ${libc_cv_asm_global_directive} baz
872 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
873 libc_cv_asm_weakext_directive=yes
875 libc_cv_asm_weakext_directive=no
881 if test $libc_cv_asm_weak_directive = yes; then
882 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
883 elif test $libc_cv_asm_weakext_directive = yes; then
884 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
887 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
888 cat > conftest.c <<\EOF
893 dnl No \ in command here because it ends up inside ''.
894 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
895 -nostdlib -nostartfiles -Wl,--no-whole-archive
896 -o conftest conftest.c 1>&AC_FD_CC]); then
897 libc_cv_ld_no_whole_archive=yes
899 libc_cv_ld_no_whole_archive=no
902 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
904 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
905 cat > conftest.c <<\EOF
910 dnl No \ in command here because it ends up inside ''.
911 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
912 -nostdlib -nostartfiles -fno-exceptions
913 -o conftest conftest.c 1>&AC_FD_CC]); then
914 libc_cv_gcc_no_exceptions=yes
916 libc_cv_gcc_no_exceptions=no
919 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
921 if test "$base_machine" = alpha ; then
922 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
923 cat > conftest.c <<\EOF
927 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
929 libc_cv_gcc_alpha_ng_prefix=yes
931 libc_cv_gcc_alpha_ng_prefix=no
934 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
935 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
937 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
941 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
942 [cat > conftest.c <<EOF
943 #line __oline__ "configure"
944 static char __EH_FRAME_BEGIN__[];
947 #ifdef CHECK__register_frame
948 __register_frame (__EH_FRAME_BEGIN__);
949 __deregister_frame (__EH_FRAME_BEGIN__);
951 #ifdef CHECK__register_frame_info
952 __register_frame_info (__EH_FRAME_BEGIN__);
953 __deregister_frame_info (__EH_FRAME_BEGIN__);
958 /* FIXME: this is fragile. */
968 dnl No \ in command here because it ends up inside ''.
969 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
970 -nostdlib -nostartfiles
971 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
972 libc_cv_gcc_dwarf2_unwind_info=static
974 libc_cv_gcc_dwarf2_unwind_info=no
976 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
977 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
978 -nostdlib -nostartfiles
979 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
980 libc_cv_gcc_dwarf2_unwind_info=yes
982 libc_cv_gcc_dwarf2_unwind_info=no
986 case $libc_cv_gcc_dwarf2_unwind_info in
988 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
991 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
992 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
996 ### End of automated tests.
997 ### Now run sysdeps configure fragments.
999 # sysdeps configure fragments may set these with files to be linked below.
1003 # They also can set these variables.
1004 ldd_rewrite_script=no
1006 # Iterate over all the sysdep directories we will use, running their
1007 # configure fragments, and looking for a uname implementation.
1009 for dir in $sysnames; do
1012 *) dest=$srcdir/$dir ;;
1014 if test -r $dest/configure; then
1015 AC_MSG_RESULT(running configure fragment for $dest)
1019 if test -z "$uname"; then
1020 if test -r $dest/uname.c ||
1021 test -r $dest/uname.S ||
1022 { test -r $dest/syscalls.list &&
1023 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1030 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1032 # If we will use the generic uname implementation, we must figure out what
1033 # it will say by examining the system, and write the results in config-name.h.
1034 if test "$uname" = "sysdeps/generic"; then
1037 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1039 if test $uname_sysname != $config_os; then
1040 config_release=`echo $config_os | sed s/$uname_sysname//`
1043 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1044 if test -r /vmunix; then
1045 kernel_id=`strings /vmunix | grep UNIX`
1046 elif test -r /dynix; then
1047 kernel_id=`strings /dynix | grep DYNIX`
1053 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1054 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1056 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1058 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1059 != x$config_release; then
1060 # The configuration release is a substring of the kernel release.
1061 libc_cv_uname_release=$kernel_release
1062 elif test x$config_release != x; then
1063 libc_cv_uname_release=$config_release
1064 elif test x$kernel_release != x; then
1065 libc_cv_uname_release=$kernel_release
1067 libc_cv_uname_release=unknown
1069 uname_release="$libc_cv_uname_release"
1071 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1072 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1074 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1076 if test -n "$kernel_version"; then
1077 libc_cv_uname_version="$kernel_version"
1079 libc_cv_uname_version=unknown
1081 uname_version="$libc_cv_uname_version"
1083 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1084 config_uname=config-name.h:config-name.in
1086 # For non-generic uname, we don't need to create config-name.h at all.
1090 AC_MSG_CHECKING(stdio selection)
1093 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1094 default) stdio=stdio ;;
1096 AC_MSG_RESULT($stdio)
1098 AC_MSG_CHECKING(ldap selection)
1107 AC_MSG_RESULT($ldap)
1109 AC_SUBST(libc_cv_slibdir)
1110 AC_SUBST(libc_cv_sysconfdir)
1111 AC_SUBST(libc_cv_rootsbindir)
1113 AC_SUBST(has_ldconfig)
1114 AC_SUBST(ldd_rewrite_script)
1116 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1117 if test $gnu_ld = yes; then
1118 AC_DEFINE(HAVE_GNU_LD)
1120 if test $gnu_as = yes; then
1121 AC_DEFINE(HAVE_GNU_AS)
1123 if test $elf = yes; then
1129 if test $shared = default; then
1130 if test $gnu_ld = yes; then
1133 # For now we do not assume shared libs are available. In future more
1134 # tests might become available.
1139 dnl We must not allow compilation without static library on some platforms.
1140 if test $static = no && test $shared = yes; then
1144 *** You must compile with support for the static library since the shared
1145 *** library uses it. Restart configure without \`--disable-static'.])
1152 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1154 cat > conftest.c <<EOF
1155 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1156 # error PIC is default.
1159 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1163 AC_SUBST(pic_default)
1168 AC_SUBST(static_nss)
1169 AC_SUBST(nopic_initfini)
1173 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1176 config_makefile=Makefile
1179 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
1182 if test $libc_cv_gcc_pipe_bug = yes; then
1187 AC_OUTPUT_COMMANDS([
1188 if test "$realCC"; then
1189 sed -e 's/%{pipe:-}/%|/g' `$realCC -print-file-name=specs` >specsT
1191 fi], [realCC=$realCC])
1193 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1194 [echo '$config_vars' >> config.make; test -d bits || mkdir bits])