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_WITH(headers, dnl
51 [ --with-headers=PATH location of system headers to use
52 [e.g. /usr/src/linux/include]
53 [default=compiler default]],
54 sysheaders=$withval, sysheaders='')
56 AC_ARG_ENABLE(libio, dnl
57 [ --enable-libio build in GNU libio instead of GNU stdio],
58 [if test $enableval = yes; then
65 AC_ARG_ENABLE(sanity-checks, dnl
66 [ --disable-sanity-checks really do not use threads (should not be used
67 except in special situations) [default=yes]],
68 enable_sanity=$enableval, enable_sanity=yes)
70 dnl Arguments to enable or disable building the static, shared, profiled,
71 dnl and -fomit-frame-pointer libraries.
72 AC_ARG_ENABLE(static, dnl
73 [ --enable-static build static library [default=yes]],
74 static=$enableval, static=yes)
75 AC_ARG_ENABLE(shared, dnl
76 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
77 shared=$enableval, shared=default)
78 AC_ARG_ENABLE(profile, dnl
79 [ --enable-profile build profiled library [default=yes]],
80 profile=$enableval, profile=yes)
81 AC_ARG_ENABLE(omitfp, dnl
82 [ --enable-omitfp build undebuggable optimized library [default=no]],
83 omitfp=$enableval, omitfp=no)
84 AC_ARG_ENABLE(bounded, dnl
85 [ --enable-bounded build with runtime bounds checking [default=no]],
86 bounded=$enableval, bounded=no)
87 AC_ARG_ENABLE(versioning, dnl
88 [ --disable-versioning do not include versioning information in the
89 library objects [default=yes if supported]],
90 enable_versioning=$enableval, enable_versioning=yes)
92 dnl Generic infrastructure for drop-in additions to libc.
93 AC_ARG_ENABLE(add-ons, dnl
94 [ --enable-add-ons[=DIR1,DIR2]... configure and build add-ons in DIR1,DIR2,...
95 search for add-ons if no parameter given],
97 yes) if test "$srcdir" = "."; then
98 add_ons=`echo */configure | sed -e 's!/configure!!g'`
100 add_ons=`echo $srcdir/*/configure | \
101 sed -e 's!/configure!!g' -e "s!$srcdir/!!g"`
103 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
107 AC_CONFIG_SUBDIRS($add_ons)
109 if test x"$add_ons" != x; then
110 for f in $add_ons; do
111 # Test whether such a subdir really exists.
112 if test -d $srcdir/$f; then
113 add_ons_pfx="$add_ons_pfx $f/"
115 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
120 dnl On some platforms we cannot use dynamic loading. We must provide
121 dnl static NSS modules.
122 AC_ARG_ENABLE(static-nss, dnl
123 [ --enable-static-nss build static NSS modules [default=no]],
124 static_nss=$enableval, static_nss=no)
125 if test x"$static_nss" = xyes; then
126 AC_DEFINE(DO_STATIC_NSS)
131 # The way shlib-versions is used to generate soversions.mk uses a
132 # fairly simplistic model for name recognition that can't distinguish
133 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
134 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
135 # tell. This doesn't get used much beyond that, so it's fairly safe.
140 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
145 ### I put this here to prevent those annoying emails from people who cannot
146 ### read and try to compile glibc on unsupported platforms. --drepper
148 ### By using the undocumented --enable-hacker-mode option for configure
149 ### one can skip this test to make the configuration not fail for unsupported
152 if test -z "$enable_hacker_mode"; then
153 case "$machine-$host_os" in
154 *-linux* | *-gnu* | arm*-none*)
157 echo "*** The GNU C library is currently not available for this platform."
158 echo "*** So far nobody cared to port it and if there is no volunteer it"
159 echo "*** might never happen. So, if you have interest to see glibc on"
160 echo "*** this platform visit"
161 echo "*** http://www.gnu.org/software/libc/porting.html"
162 echo "*** and join the group of porters"
168 # We keep the original values in `$config_*' and never modify them, so we
169 # can write them unchanged into config.make. Everything else uses
170 # $machine, $vendor, and $os, and changes them whenever convenient.
171 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
173 # Some configurations imply other options.
175 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
176 # These systems always use GNU tools.
177 gnu_ld=yes gnu_as=yes ;;
180 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
181 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
183 gnu* | linux* | sysv4* | solaris2* | irix6*)
184 # These systems (almost) always use the ELF format.
189 machine=$config_machine
190 vendor=$config_vendor
193 dnl We need to use [ and ] for other purposes for a while now.
195 # Expand the configuration machine name into a subdirectory by architecture
196 # type and particular chip.
198 a29k | am29000) base_machine=a29k machine=a29k ;;
199 alpha*) base_machine=alpha machine=alpha/$machine ;;
200 arm*) base_machine=arm machine=arm/$machine ;;
201 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
202 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
203 hppa*) base_machine=hppa machine=hppa/$machine ;;
204 i[3456]86) base_machine=i386 machine=i386/$machine ;;
205 m680?0) base_machine=m68k machine=m68k/$machine ;;
206 m68k) base_machine=m68k machine=m68k/m68020 ;;
207 m88???) base_machine=m88k machine=m88k/$machine ;;
208 m88k) base_machine=m88k machine=m88k/m88100 ;;
209 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
210 mips*) base_machine=mips
212 IP22) machine=mips/mips3 ;;
213 *) machine=mips/$machine ,,
216 base_machine=sparc machine=sparc/sparc32 ;;
217 sparcv8 | supersparc | hypersparc)
218 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
219 sparc64 | ultrasparc)
220 base_machine=sparc machine=sparc/sparc64 ;;
223 AC_SUBST(base_machine)
225 if test "$base_machine" = "i386"; then
226 AC_DEFINE(USE_REGPARMS)
229 # Compute the list of sysdep directories for this configuration.
230 # This can take a while to compute.
231 sysdep_dir=$srcdir/sysdeps
232 AC_MSG_CHECKING(sysdep dirs)
233 dnl We need to use [ and ] for other purposes for a while now.
235 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
236 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
241 netbsd* | 386bsd* | freebsd* | bsdi*)
242 base_os=unix/bsd/bsd4.4 ;;
243 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
245 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
248 base_os=unix/sysv/irix6/$os ;;
250 base_os=unix/sysv/sysv4 ;;
252 base_os=standalone ;;
257 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
260 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
264 o=`echo $tail | sed 's/[0-9]*$//'`
265 if test $o != $tail; then
268 # For linux-gnu, try linux-gnu, then linux.
269 o=`echo $tail | sed 's/-.*$//'`
270 if test $o != $tail; then
274 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
277 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
283 # For sparc/sparc9, try sparc/sparc9 and then sparc.
286 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
288 # Prepend the machine's FPU directory unless --without-fp.
289 if test "$with_fp" = yes; then
296 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
299 # Find what sysdep directories exist.
301 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
302 for d in $add_ons_pfx ''; do
303 for b in $base ''; do
304 for m0 in $mach ''; do
305 for v in /$vendor ''; do
306 test "$v" = / && continue
307 for o in /$ostry ''; do
308 test "$o" = / && continue
309 for m in $mach ''; do
310 if test "$m0$b$v$o$m"; then
311 try="${d}sysdeps$m0$b$v$o$m"
312 test -n "$enable_debug_configure" &&
313 echo "$0 [DEBUG]: try $try" >&2
316 *) dest=$srcdir/$try ;;
318 if test -d $dest; then
319 sysnames="$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 $add_ons_pfx ''; do
352 *) xsrcdir=$srcdir/ ;;
355 if test -d $xsrcdir${d}sysdeps$m/elf; then
356 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
360 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
364 # Expand the list of system names into a full list of directories
365 # from each element's parent name and Implies file (if present).
368 while test $# -gt 0; do
372 case " $names " in *" $name "*)
373 # Already in the list.
377 # Report each name as we discover it, so there is no long pause in output.
378 echo $ac_n "$name $ac_c" >&AC_FD_MSG
380 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
384 *) xsrcdir=$srcdir/ ;;
386 test -n "$enable_debug_configure" &&
387 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
389 if test -f $xsrcdir$name/Implies; then
390 # Collect more names from the `Implies' file (removing comments).
391 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
393 for x in $implied_candidate; do
394 if test -d $xsrcdir$name_base/$x; then
395 implied="$implied $name_base/$x";
397 AC_MSG_WARN($name/Implies specifies nonexistent $x)
404 # Add NAME to the list of names.
407 # Find the parent of NAME, using the empty string if it has none.
409 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
412 # Add the names implied by NAME, and NAME's parent (if it has one), to
413 # the list of names to be processed (the argument list). We prepend the
414 # implied names to the list and append the parent. We want implied
415 # directories to come before further directories inferred from the
416 # configuration components; this ensures that for sysv4, unix/common
417 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
419 sysnames="`echo $implied $* $parent`"
420 test -n "$sysnames" && set $sysnames
423 # Add the default directories.
424 sysnames="$names sysdeps/generic"
426 # The other names were emitted during the scan.
427 AC_MSG_RESULT(sysdeps/generic)
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 \([egcst0-9.-]*\)],
443 [egcs-2.91.*|egcs-2.90.2[789]|egcs-2.90.[3-9][0-9]|*2.8.[1-9]*|*2.9.[0-9]*],
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.*\([0-9][0-9]*\.[0-9]*\)],
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 $sysheaders"
486 AC_SUBST(SYSINCLUDES)
488 # check if ar takes S
489 AC_CACHE_CHECK(for ar S, libc_cv_ar_S, [dnl
494 if AC_TRY_COMMAND([${AR-ar} rcuS $tmplib $tmpo > /dev/null 2>&1]); then
499 rm -f $tmpo $tmplib])
500 AC_SUBST(libc_cv_ar_S)dnl
502 # Test if LD_LIBRARY_PATH contains the notation for the current directory
503 # since this would lead to problems installing/building glibc.
504 # LD_LIBRARY_PATH contains the current directory if one of the following
506 # - one of the terminals (":" and ";") is the first or last sign
507 # - two terminals occur directly after each other
508 # - the path contains an element with a dot in it
509 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
511 case ${LD_LIBRARY_PATH} in
512 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
513 ld_library_path_setting="contains current directory"
516 ld_library_path_setting="ok"
520 AC_MSG_RESULT($ld_library_path_setting)
521 if test "$ld_library_path_setting" != "ok"; then
523 *** LD_LIBRARY_PATH shouldn't contain the current directory when
524 *** building glibc. Please change the environment variable
525 *** and run configure again.])
528 AC_PATH_PROG(BASH, bash, no)
529 if test "$BASH" != no &&
530 $BASH -c 'test "$BASH_VERSINFO" \
531 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
532 libc_cv_have_bash2=yes
534 libc_cv_have_bash2=no
536 AC_SUBST(libc_cv_have_bash2)
538 dnl We need a ksh compatible shell for tzselect.
539 if test "$BASH" = no; then
540 AC_PATH_PROG(KSH, ksh, no)
541 if test "$KSH" = no; then
551 AC_SUBST(libc_cv_have_ksh)
553 AC_PATH_PROGS(PERL, perl, no)
556 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
557 echo '#include <stddef.h>
558 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
559 if eval "$ac_cpp conftest.c 2>/dev/null" \
560 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
561 libc_cv_signed_size_t=no
563 libc_cv_signed_size_t=yes
566 if test $libc_cv_signed_size_t = yes; then
567 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
568 cat >> confdefs.h <<\EOF
570 #define __SIZE_TYPE__ unsigned
574 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
576 [#define __need_size_t
577 #define __need_wchar_t
580 #include <stddef.h>], [size_t size; wchar_t wchar;
582 #error stddef.h ignored __need_*
584 if (&size == NULL || &wchar == NULL) abort ();],
585 libc_cv_friendly_stddef=yes,
586 libc_cv_friendly_stddef=no)])
587 if test $libc_cv_friendly_stddef = yes; then
588 config_vars="$config_vars
589 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
592 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
593 libc_cv_need_minus_P, [dnl
594 cat > conftest.S <<EOF
595 #include "confdefs.h"
596 /* Nothing whatsoever. */
598 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
599 libc_cv_need_minus_P=no
601 libc_cv_need_minus_P=yes
604 if test $libc_cv_need_minus_P = yes; then
605 config_vars="$config_vars
606 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
609 AC_CACHE_CHECK(for assembler global-symbol directive,
610 libc_cv_asm_global_directive, [dnl
611 libc_cv_asm_global_directive=UNKNOWN
612 for ac_globl in .globl .global; do
613 cat > conftest.s <<EOF
618 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
619 libc_cv_asm_global_directive=${ac_globl}
622 test $libc_cv_asm_global_directive != UNKNOWN && break
624 if test $libc_cv_asm_global_directive = UNKNOWN; then
625 AC_MSG_ERROR(cannot determine asm global directive)
627 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
630 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
631 cat > conftest.s <<EOF
634 .set glibc_conftest_frobozz,foo
635 $libc_cv_asm_global_directive glibc_conftest_frobozz
637 # The alpha-dec-osf1 assembler gives only a warning for `.set'
638 # (but it doesn't work), so we must do a linking check to be sure.
639 cat > conftest1.c <<\EOF
640 extern int glibc_conftest_frobozz;
641 main () { printf ("%d\n", glibc_conftest_frobozz); }
643 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
644 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
645 libc_cv_asm_set_directive=yes
647 libc_cv_asm_set_directive=no
650 if test $libc_cv_asm_set_directive = yes; then
651 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
654 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
655 [cat > conftest.s <<EOF
658 .symver _sym,sym@VERS
660 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
661 libc_cv_asm_symver_directive=yes
663 libc_cv_asm_symver_directive=no
666 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
667 if test $libc_cv_asm_symver_directive = yes; then
668 cat > conftest.s <<EOF
671 .symver _sym,sym@VERS
673 cat > conftest.map <<EOF
682 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
683 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
684 -nostartfiles -nostdlib
685 -Wl,--version-script,conftest.map
688 libc_cv_ld_version_script_option=yes
690 libc_cv_ld_version_script_option=no
693 libc_cv_ld_version_script_option=no
696 libc_cv_ld_version_script_option=no
699 if test $libc_cv_asm_symver_directive = yes &&
700 test $libc_cv_ld_version_script_option = yes &&
701 test $enable_versioning = yes; then
703 AC_DEFINE(DO_VERSIONING)
709 if test $VERSIONING = no; then
711 *** WARNING: You should not compile GNU libc without versioning. Not using
712 *** versioning will introduce incompatibilities so that old binaries
713 *** will not run anymore.
714 *** For versioning you need recent binutils (binutils-2.8.1.0.17 or newer)."
716 if test $elf = yes; then
717 AC_CACHE_CHECK(for .previous assembler directive,
718 libc_cv_asm_previous_directive, [dnl
719 cat > conftest.s <<EOF
723 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
724 libc_cv_asm_previous_directive=yes
726 libc_cv_asm_previous_directive=no
729 if test $libc_cv_asm_previous_directive = yes; then
730 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
732 AC_CACHE_CHECK(for .popsection assembler directive,
733 libc_cv_asm_popsection_directive, [dnl
734 cat > conftest.s <<EOF
735 .pushsection foo_section
738 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
739 libc_cv_asm_popsection_directive=yes
741 libc_cv_asm_popsection_directive=no
744 if test $libc_cv_asm_popsection_directive = yes; then
745 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
750 if test $elf != yes; then
751 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
752 [AC_TRY_COMPILE(, [asm (".section .init");
753 asm (".section .fini");
755 libc_cv_have_initfini=yes,
756 libc_cv_have_initfini=no)])
757 AC_SUBST(libc_cv_have_initfini)dnl
758 if test $libc_cv_have_initfini = yes; then
759 AC_DEFINE(HAVE_INITFINI)
763 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
764 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
765 [cat > conftest.$ac_ext <<EOF
766 dnl This sometimes fails to find confdefs.h, for some reason.
767 dnl [#]line __oline__ "[$]0"
768 [#]line __oline__ "configure"
769 #include "confdefs.h"
770 void underscore_test(void) {
773 if AC_TRY_EVAL(ac_compile); then
774 if grep _underscore_test conftest* >/dev/null; then
775 ifelse([$1], , :, [rm -f conftest*
778 ifelse([$2], , , [rm -f conftest*
782 echo "configure: failed program was:" >&AC_FD_CC
783 cat conftest.$ac_ext >&AC_FD_CC
784 ifelse([$2], , , [rm -f conftest*
789 if test $elf = yes; then
790 libc_cv_asm_underscores=no
792 if test $ac_cv_prog_cc_works = yes; then
793 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
794 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
795 libc_cv_asm_underscores=yes,
796 libc_cv_asm_underscores=no)])
798 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
799 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
800 libc_cv_asm_underscores=no)])
803 if test $libc_cv_asm_underscores = no; then
804 AC_DEFINE(NO_UNDERSCORES)
807 if test $elf = yes; then
808 libc_cv_weak_symbols=yes
811 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
813 cat > conftest.s <<EOF
815 ${libc_cv_asm_global_directive} foo
820 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
821 libc_cv_asm_weak_directive=yes
823 libc_cv_asm_weak_directive=no
827 if test $libc_cv_asm_weak_directive = no; then
828 AC_CACHE_CHECK(for assembler .weakext directive,
829 libc_cv_asm_weakext_directive,
831 cat > conftest.s <<EOF
833 ${libc_cv_asm_global_directive} foo
837 ${libc_cv_asm_global_directive} baz
840 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
841 libc_cv_asm_weakext_directive=yes
843 libc_cv_asm_weakext_directive=no
849 if test $libc_cv_asm_weak_directive = yes; then
850 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
851 elif test $libc_cv_asm_weakext_directive = yes; then
852 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
855 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
856 cat > conftest.c <<\EOF
861 dnl No \ in command here because it ends up inside ''.
862 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
863 -nostdlib -nostartfiles -Wl,--no-whole-archive
864 -o conftest conftest.c 1>&AC_FD_CC]); then
865 libc_cv_ld_no_whole_archive=yes
867 libc_cv_ld_no_whole_archive=no
870 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
872 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
873 cat > conftest.c <<\EOF
878 dnl No \ in command here because it ends up inside ''.
879 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
880 -nostdlib -nostartfiles -fno-exceptions
881 -o conftest conftest.c 1>&AC_FD_CC]); then
882 libc_cv_gcc_no_exceptions=yes
884 libc_cv_gcc_no_exceptions=no
887 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
889 if test "$base_machine" = alpha ; then
890 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
891 cat > conftest.c <<\EOF
895 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
897 libc_cv_gcc_alpha_ng_prefix=yes
899 libc_cv_gcc_alpha_ng_prefix=no
902 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
903 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
905 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
909 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
910 [cat > conftest.c <<EOF
911 #line __oline__ "configure"
912 static char __EH_FRAME_BEGIN__[];
915 #ifdef CHECK__register_frame
916 __register_frame (__EH_FRAME_BEGIN__);
917 __deregister_frame (__EH_FRAME_BEGIN__);
919 #ifdef CHECK__register_frame_info
920 __register_frame_info (__EH_FRAME_BEGIN__);
921 __deregister_frame_info (__EH_FRAME_BEGIN__);
926 /* FIXME: this is fragile. */
936 dnl No \ in command here because it ends up inside ''.
937 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
938 -nostdlib -nostartfiles
939 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
940 libc_cv_gcc_dwarf2_unwind_info=static
942 libc_cv_gcc_dwarf2_unwind_info=no
944 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
945 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
946 -nostdlib -nostartfiles
947 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
948 libc_cv_gcc_dwarf2_unwind_info=yes
950 libc_cv_gcc_dwarf2_unwind_info=no
954 case $libc_cv_gcc_dwarf2_unwind_info in
956 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
959 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
960 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
964 ### End of automated tests.
965 ### Now run sysdeps configure fragments.
967 # sysdeps configure fragments may set these with files to be linked below.
971 # They also can set these variables.
972 ldd_rewrite_script=no
974 # Iterate over all the sysdep directories we will use, running their
975 # configure fragments, and looking for a uname implementation.
977 for dir in $sysnames; do
980 *) dest=$srcdir/$dir ;;
982 if test -r $dest/configure; then
983 AC_MSG_RESULT(running configure fragment for $dest)
987 if test -z "$uname"; then
988 if test -r $dest/uname.c ||
989 test -r $dest/uname.S ||
990 { test -r $dest/syscalls.list &&
991 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
998 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1000 # If we will use the generic uname implementation, we must figure out what
1001 # it will say by examining the system, and write the results in config-name.h.
1002 if test "$uname" = "sysdeps/generic"; then
1005 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1007 if test $uname_sysname != $config_os; then
1008 config_release=`echo $config_os | sed s/$uname_sysname//`
1011 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1012 if test -r /vmunix; then
1013 kernel_id=`strings /vmunix | grep UNIX`
1014 elif test -r /dynix; then
1015 kernel_id=`strings /dynix | grep DYNIX`
1021 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1022 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1024 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1026 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1027 != x$config_release; then
1028 # The configuration release is a substring of the kernel release.
1029 libc_cv_uname_release=$kernel_release
1030 elif test x$config_release != x; then
1031 libc_cv_uname_release=$config_release
1032 elif test x$kernel_release != x; then
1033 libc_cv_uname_release=$kernel_release
1035 libc_cv_uname_release=unknown
1037 uname_release="$libc_cv_uname_release"
1039 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1040 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1042 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1044 if test -n "$kernel_version"; then
1045 libc_cv_uname_version="$kernel_version"
1047 libc_cv_uname_version=unknown
1049 uname_version="$libc_cv_uname_version"
1051 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1052 config_uname=config-name.h:config-name.in
1054 # For non-generic uname, we don't need to create config-name.h at all.
1058 AC_MSG_CHECKING(stdio selection)
1061 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1062 default) stdio=stdio ;;
1064 AC_MSG_RESULT($stdio)
1066 AC_MSG_CHECKING(ldap selection)
1075 AC_MSG_RESULT($ldap)
1077 AC_SUBST(libc_cv_slibdir)
1078 AC_SUBST(libc_cv_sysconfdir)
1079 AC_SUBST(libc_cv_rootsbindir)
1081 AC_SUBST(has_ldconfig)
1082 AC_SUBST(ldd_rewrite_script)
1084 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1085 if test $gnu_ld = yes; then
1086 AC_DEFINE(HAVE_GNU_LD)
1088 if test $gnu_as = yes; then
1089 AC_DEFINE(HAVE_GNU_AS)
1091 if test $elf = yes; then
1097 if test $shared = default; then
1098 if test $gnu_ld = yes; then
1101 # For now we do not assume shared libs are available. In future more
1102 # tests might become available.
1107 dnl We must not allow compilation without static library on some platforms.
1108 if test $static = no && test $shared = yes; then
1112 *** You must compile with support for the static library since the shared
1113 *** library uses it. Restart configure without \`--disable-static'.])
1120 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1122 cat > conftest.c <<EOF
1123 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1124 # error PIC is default.
1127 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1131 AC_SUBST(pic_default)
1136 AC_SUBST(static_nss)
1137 AC_SUBST(nopic_initfini)
1141 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1144 config_makefile=Makefile
1147 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
1150 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1151 [echo '$config_vars' >> config.make; test -d bits || mkdir bits])