1 Dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.11)dnl dnl Minimum Autoconf version required.
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(gnu-binutils, dnl
40 --with-gnu-binutils if using GNU binutils (as and ld),
41 gnu_binutils=$withval, gnu_binutils=no)
42 AC_ARG_WITH(gnu-ld, dnl
43 --with-gnu-ld if using GNU ld (in the binutils package),
44 gnu_ld=$withval, gnu_ld=no)
45 AC_ARG_WITH(gnu-as, dnl
46 --with-gnu-as if using GNU as (in the binutils package),
47 gnu_as=$withval, gnu_as=no)
48 test $gnu_binutils = yes && gnu_as=yes gnu_ld=yes
50 --with-elf if using the ELF object format,
53 AC_ARG_ENABLE(libio, dnl
54 [ --enable-libio build in GNU libio instead of GNU stdio],
55 [if test $enableval = yes; then
62 dnl Arguments to enable or disable building the shared, profiled, and
63 dnl -fomit-frame-pointer libraries.
64 AC_ARG_ENABLE(shared, dnl
65 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
66 shared=$enableval, shared=default)
67 AC_ARG_ENABLE(profile, dnl
68 [ --enable-profile build profiled library [default=yes]],
69 profile=$enableval, profile=yes)
70 AC_ARG_ENABLE(omitfp, dnl
71 [ --enable-omitfp build undebuggable optimized library [default=no]],
72 omitfp=$enableval, omitfp=no)
74 dnl Generic infrastructure for drop-in additions to libc.
75 AC_ARG_ENABLE(add-ons, dnl
76 [ --enable-add-ons=DIR... configure and build named extra directories],
77 [add_ons=`echo "$enableval" | sed 's/,/ /g'`],
79 AC_CONFIG_SUBDIRS($add_ons)
81 if test x"$add_ons" != x; then
83 add_ons_pfx="$add_ons_pfx $f/"
89 # The way shlib-versions is used to generate soversions.mk uses a
90 # fairly simplistic model for name recognition that can't distinguish
91 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
92 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
93 # tell. This doesn't get used much beyond that, so it's fairly safe.
98 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
102 # We keep the original values in `$config_*' and never modify them, so we
103 # can write them unchanged into config.make. Everything else uses
104 # $machine, $vendor, and $os, and changes them whenever convenient.
105 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
107 # Some configurations imply other options.
109 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
110 # These systems always use GNU tools.
111 gnu_ld=yes gnu_as=yes ;;
116 gnu* | linux* | sysv4* | solaris2*)
117 # These systems (almost) always use the ELF format.
122 machine=$config_machine
123 vendor=$config_vendor
126 dnl We need to use [ and ] for other purposes for a while now.
128 # Expand the configuration machine name into a subdirectory by architecture
129 # type and particular chip.
131 a29k | am29000) base_machine=a29k machine=a29k ;;
132 alpha*) base_machine=alpha machine=alpha/$machine ;;
133 hppa*) base_machine=hppa machine=hppa/$machine ;;
134 i[3456]86) base_machine=i386 machine=i386/$machine ;;
135 m680?0) base_machine=m68k machine=m68k/$machine ;;
136 m68k) base_machine=m68k machine=m68k/m68020 ;;
137 m88???) base_machine=m88k machine=m88k/$machine ;;
138 m88k) base_machine=m88k machine=m88k/m88100 ;;
139 mips*) base_machine=mips machine=mips/$machine ;;
140 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
141 sparc[6789]) base_machine=sparc machine=sparc/$machine ;;
142 supersparc) base_machine=sparc machine=sparc/sparc8 ;;
145 AC_SUBST(base_machine)
147 # Compute the list of sysdep directories for this configuration.
148 # This can take a while to compute.
149 sysdep_dir=$srcdir/sysdeps
150 AC_MSG_CHECKING(sysdep dirs)
151 dnl We need to use [ and ] for other purposes for a while now.
153 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
154 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
159 netbsd* | 386bsd* | freebsd* | bsdi*)
160 base_os=unix/bsd/bsd4.4 ;;
161 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
163 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
166 base_os=unix/sysv/sysv4 ;;
168 base_os=standalone ;;
173 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
176 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
180 o=`echo $tail | sed 's/[0-9]*$//'`
181 if test $o != $tail; then
184 # For linux-gnu, try linux-gnu, then linux.
185 o=`echo $tail | sed 's/-.*$//'`
186 if test $o != $tail; then
190 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
193 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
199 # For sparc/sparc9, try sparc/sparc9 and then sparc.
202 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
204 # Prepend the machine's FPU directory unless --without-fp.
205 if test "$with_fp" = yes; then
212 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
215 # Find what sysdep directories exist.
217 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
218 for d in $add_ons_pfx ''; do
219 for b in $base ''; do
220 for m0 in $mach ''; do
221 for v in /$vendor ''; do
222 for o in /$ostry ''; do
223 for m in $mach ''; do
224 if test "$m0$b$v$o$m"; then
225 try="${d}sysdeps$m0$b$v$o$m"
226 test -n "$enable_debug_configure" &&
227 echo "$0 [DEBUG]: try $try" >&2
230 *) dest=$srcdir/$try ;;
232 if test -d $dest; then
233 sysnames="$sysnames $try"
234 { test -n "$o" || test -n "$b"; } && os_used=t
235 { test -n "$m" || test -n "$m0"; } && machine_used=t
246 if test -z "$os_used" && test "$os" != none; then
247 AC_MSG_ERROR(Operating system $os is not supported.)
249 if test -z "$machine_used" && test "$machine" != none; then
250 AC_MSG_ERROR(The $machine is not supported.)
253 # We have now validated the configuration.
256 # If using ELF, look for an `elf' subdirectory of each machine directory.
257 # We prepend these rather than inserting them whereever the machine appears
258 # because things specified by the machine's ELF ABI should override
259 # OS-specific things, and should always be the same for any OS on the
260 # machine (otherwise what's the point of an ABI?).
261 if test "$elf" = yes; then
263 for d in $add_ons_pfx ''; do
266 *) xsrcdir=$srcdir/ ;;
269 if test -d $xsrcdir${d}sysdeps$m/elf; then
270 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
274 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
278 # Expand the list of system names into a full list of directories
279 # from each element's parent name and Implies file (if present).
282 while test $# -gt 0; do
286 case " $names " in *" $name "*)
287 # Already in the list.
291 # Report each name as we discover it, so there is no long pause in output.
292 echo $ac_n "$name $ac_c" >&AC_FD_MSG
294 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
298 *) xsrcdir=$srcdir/ ;;
300 test -n "$enable_debug_configure" &&
301 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
303 if test -f $xsrcdir$name/Implies; then
304 # Collect more names from the `Implies' file (removing comments).
305 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
307 for x in $implied_candidate; do
308 if test -d $xsrcdir$name_base/$x; then
309 implied="$implied $name_base/$x";
311 AC_MSG_WARN($name/Implies specifies nonexistent $x)
318 # Add NAME to the list of names.
321 # Find the parent of NAME, using the empty string if it has none.
323 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
326 # Add the names implied by NAME, and NAME's parent (if it has one), to
327 # the list of names to be processed (the argument list). We prepend the
328 # implied names to the list and append the parent. We want implied
329 # directories to come before further directories inferred from the
330 # configuration components; this ensures that for sysv4, unix/common
331 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
333 sysnames="`echo $implied $* $parent`"
334 test -n "$sysnames" && set $sysnames
337 # Add the default directories.
338 sysnames="$names sysdeps/generic sysdeps/stub"
340 # The other names were emitted during the scan.
341 AC_MSG_RESULT(sysdeps/generic sysdeps/stub)
347 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
348 # The makefiles need to use a different form to find it in $srcdir.
349 INSTALL='$(..)./install-sh -c'
352 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
354 AC_CHECK_TOOL(CC, gcc)
355 if test $host != $build; then
356 AC_CHECK_PROG(BUILD_CC, gcc cc)
359 AC_CHECK_TOOL(AR, ar)
360 AC_CHECK_TOOL(RANLIB, ranlib, :)
362 AC_PATH_PROG(BASH, bash, no)
363 if test "$BASH" != no && $BASH -c 'test "$BASH_VERSINFO" -ge 2'; then
364 libc_cv_have_bash2=yes
366 libc_cv_have_bash2=no
368 AC_SUBST(libc_cv_have_bash2)
370 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
371 echo '#include <stddef.h>
372 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
373 if eval "$ac_cpp conftest.c 2>/dev/null" \
374 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
375 libc_cv_signed_size_t=no
377 libc_cv_signed_size_t=yes
380 if test $libc_cv_signed_size_t = yes; then
381 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
382 cat >> confdefs.h <<\EOF
384 #define __SIZE_TYPE__ unsigned
388 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
390 [#define __need_size_t
391 #define __need_wchar_t
394 #include <stddef.h>], [size_t size; wchar_t wchar;
396 #error stddef.h ignored __need_*
398 if (&size == NULL || &wchar == NULL) abort ();],
399 libc_cv_friendly_stddef=yes,
400 libc_cv_friendly_stddef=no)])
401 if test $libc_cv_friendly_stddef = yes; then
402 config_vars="$config_vars
403 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
406 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
407 libc_cv_need_minus_P, [dnl
408 cat > conftest.S <<EOF
409 #include "confdefs.h"
410 /* Nothing whatsoever. */
412 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
413 libc_cv_need_minus_P=no
415 libc_cv_need_minus_P=yes
418 if test $libc_cv_need_minus_P = yes; then
419 config_vars="$config_vars
420 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
423 AC_CACHE_CHECK(for assembler global-symbol directive,
424 libc_cv_asm_global_directive, [dnl
425 libc_cv_asm_global_directive=UNKNOWN
426 for ac_globl in .globl .global; do
427 cat > conftest.s <<EOF
432 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
433 libc_cv_asm_global_directive=${ac_globl}
436 test $libc_cv_asm_global_directive != UNKNOWN && break
438 if test $libc_cv_asm_global_directive = UNKNOWN; then
439 AC_MSG_ERROR(cannot determine asm global directive)
441 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
444 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
445 cat > conftest.s <<EOF
448 .set glibc_conftest_frobozz,foo
449 $libc_cv_asm_global_directive glibc_conftest_frobozz
451 # The alpha-dec-osf1 assembler gives only a warning for `.set'
452 # (but it doesn't work), so we must do a linking check to be sure.
453 cat > conftest1.c <<\EOF
454 extern int glibc_conftest_frobozz;
455 main () { printf ("%d\n", glibc_conftest_frobozz); }
457 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
458 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
459 libc_cv_asm_set_directive=yes
461 libc_cv_asm_set_directive=no
464 if test $libc_cv_asm_set_directive = yes; then
465 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
468 if test $elf != yes; then
469 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
470 [AC_TRY_COMPILE(, [asm (".section .init");
471 asm (".section .fini");
473 libc_cv_have_initfini=yes,
474 libc_cv_have_initfini=no)])
475 AC_SUBST(libc_cv_have_initfini)dnl
476 if test $libc_cv_have_initfini = yes; then
477 AC_DEFINE(HAVE_INITFINI)
481 if test $elf = yes; then
482 libc_cv_asm_underscores=no
484 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
485 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
486 libc_cv_asm_underscores=yes,
487 libc_cv_asm_underscores=no)])
489 if test $libc_cv_asm_underscores = no; then
490 AC_DEFINE(NO_UNDERSCORES)
493 if test $elf = yes; then
494 libc_cv_weak_symbols=yes
495 libc_cv_asm_weak_directive=yes
496 libc_cv_asm_weakext_directive=no
498 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
500 cat > conftest.s <<EOF
502 ${libc_cv_asm_global_directive} foo
507 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
508 libc_cv_asm_weak_directive=yes
510 libc_cv_asm_weak_directive=no
514 if test $libc_cv_asm_weak_directive = no; then
515 AC_CACHE_CHECK(for assembler .weakext directive,
516 libc_cv_asm_weakext_directive,
518 cat > conftest.s <<EOF
520 ${libc_cv_asm_global_directive} foo
525 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
526 libc_cv_asm_weakext_directive=yes
528 libc_cv_asm_weakext_directive=no
535 if test $libc_cv_asm_weak_directive = yes; then
536 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
537 elif test $libc_cv_asm_weakext_directive = yes; then
538 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
541 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
542 cat > conftest.c <<\EOF
547 dnl No \ in command here because it ends up inside ''.
548 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
549 -nostdlib -nostartfiles -Wl,--no-whole-archive
550 -o conftest conftest.c]); then
551 libc_cv_ld_no_whole_archive=yes
553 libc_cv_ld_no_whole_archive=no
556 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
558 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
559 cat > conftest.c <<\EOF
564 dnl No \ in command here because it ends up inside ''.
565 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
566 -nostdlib -nostartfiles -fno-exceptions
567 -o conftest conftest.c]); then
568 libc_cv_gcc_no_exceptions=yes
570 libc_cv_gcc_no_exceptions=no
573 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
575 ### End of automated tests.
576 ### Now run sysdeps configure fragments.
578 # sysdeps configure fragments may set these with files to be linked below.
582 # Iterate over all the sysdep directories we will use, running their
583 # configure fragments, and looking for a uname implementation.
585 for dir in $sysnames; do
588 *) dest=$srcdir/$dir ;;
590 if test -r $dest/configure; then
591 AC_MSG_RESULT(running configure fragment for $dest)
595 if test -z "$uname"; then
596 if test -r $sysdep_dir/$dir/uname.c ||
597 test -r $sysdep_dir/$dir/uname.S ||
598 { test -r $sysdep_dir/$dir/syscalls.list &&
599 grep '^uname[ ]' $sysdep_dir/$dir/syscalls.list >/dev/null; }; then
606 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
608 # If we will use the generic uname implementation, we must figure out what
609 # it will say by examining the system, and write the results in config-name.h.
610 if test "$uname" = generic; then
613 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
615 if test $uname_sysname != $config_os; then
616 config_release=`echo $config_os | sed s/$uname_sysname//`
619 AC_DEFUN(LIBC_KERNEL_ID, [dnl
620 if test -r /vmunix; then
621 kernel_id=`strings /vmunix | grep UNIX`
622 elif test -r /dynix; then
623 kernel_id=`strings /dynix | grep DYNIX`
629 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
630 AC_REQUIRE([LIBC_KERNEL_ID])dnl
632 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
634 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
635 != x$config_release; then
636 # The configuration release is a substring of the kernel release.
637 libc_cv_uname_release=$kernel_release
638 elif test x$config_release != x; then
639 libc_cv_uname_release=$config_release
640 elif test x$kernel_release != x; then
641 libc_cv_uname_release=$kernel_release
643 libc_cv_uname_release=unknown
645 uname_release="$libc_cv_uname_release"
647 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
648 AC_REQUIRE([LIBC_KERNEL_ID])dnl
650 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
652 if test -n "$kernel_version"; then
653 libc_cv_uname_version="$kernel_version"
655 libc_cv_uname_version=unknown
657 uname_version="$libc_cv_uname_version"
659 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
660 config_uname=config-name.h:config-name.in
662 # For non-generic uname, we don't need to create config-name.h at all.
666 AC_MSG_CHECKING(stdio selection)
669 libio) AC_DEFINE(USE_IN_LIBIO) ;;
670 default) stdio=stdio ;;
672 AC_MSG_RESULT($stdio)
674 AC_SUBST(libc_cv_slibdir)
675 AC_SUBST(libc_cv_sysconfdir)
677 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
678 if test $gnu_ld = yes; then
679 AC_DEFINE(HAVE_GNU_LD)
681 if test $gnu_as = yes; then
682 AC_DEFINE(HAVE_GNU_AS)
684 if test $elf = yes; then
689 if test $shared = default; then
690 if test $gnu_ld = yes; then
699 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
702 config_makefile=Makefile
705 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
706 [echo '$config_vars' >> config.make])