1 Dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.10)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)
82 # We keep the original values in `$config_*' and never modify them, so we
83 # can write them unchanged into config.make. Everything else uses
84 # $machine, $vendor, and $os, and changes them whenever convenient.
85 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
87 # Some configurations imply other options.
89 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
90 # These systems always use GNU tools.
91 gnu_ld=yes gnu_as=yes ;;
96 gnu* | linux* | sysv4* | solaris2*)
97 # These systems (almost) always use the ELF format.
102 machine=$config_machine
103 vendor=$config_vendor
106 dnl We need to use [ and ] for other purposes for a while now.
108 # Expand the configuration machine name into a subdirectory by architecture
109 # type and particular chip.
111 a29k | am29000) base_machine=a29k machine=a29k ;;
112 alpha*) base_machine=alpha machine=alpha/$machine ;;
113 hppa*) base_machine=hppa machine=hppa/$machine ;;
114 i[3456]86) base_machine=i386 machine=i386/$machine ;;
115 m680?0) base_machine=m68k machine=m68k/$machine ;;
116 m68k) base_machine=m68k machine=m68k/m68020 ;;
117 m88???) base_machine=m88k machine=m88k/$machine ;;
118 m88k) base_machine=m88k machine=m88k/m88100 ;;
119 mips*) base_machine=mips machine=mips/$machine ;;
120 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
121 sparc[6789]) base_machine=sparc machine=sparc/$machine ;;
122 supersparc) base_machine=sparc machine=sparc/sparc8 ;;
125 AC_SUBST(base_machine)
127 # Compute the list of sysdep directories for this configuration.
128 # This can take a while to compute.
129 sysdep_dir=$srcdir/sysdeps
130 AC_MSG_CHECKING(sysdep dirs)
131 dnl We need to use [ and ] for other purposes for a while now.
133 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
134 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
139 netbsd* | 386bsd* | freebsd* | bsdi*)
140 base_os=unix/bsd/bsd4.4 ;;
141 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
143 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
146 base_os=unix/sysv/sysv4 ;;
148 base_os=standalone ;;
153 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
156 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
160 o=`echo $tail | sed 's/[0-9]*$//'`
161 if test $o != $tail; then
165 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
168 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
174 # For sparc/sparc9, try sparc/sparc9 and then sparc.
177 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
179 # Prepend the machine's FPU directory unless --without-fp.
180 if test "$with_fp" = yes; then
187 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
190 # Find what sysdep directories exist.
192 for b in $base ''; do
193 for m0 in $mach ''; do
194 for v in /$vendor ''; do
195 for o in /$ostry ''; do
196 for m in $mach ''; do
198 test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2
199 if test -d $sysdep_dir$try; then
200 sysnames="$sysnames $try"
201 { test -n "$o" || test -n "$b"; } && os_used=t
202 { test -n "$m" || test -n "$m0"; } && machine_used=t
210 if test -z "$os_used" && test "$os" != none; then
211 AC_MSG_ERROR(Operating system $os is not supported.)
213 if test -z "$machine_used" && test "$machine" != none; then
214 AC_MSG_ERROR(The $machine is not supported.)
217 # We have now validated the configuration.
220 # If using ELF, look for an `elf' subdirectory of each machine directory.
221 # We prepend these rather than inserting them whereever the machine appears
222 # because things specified by the machine's ELF ABI should override
223 # OS-specific things, and should always be the same for any OS on the
224 # machine (otherwise what's the point of an ABI?).
225 if test "$elf" = yes; then
228 if test -d $sysdep_dir$m/elf; then
229 elf_dirs="$elf_dirs $m/elf"
232 sysnames="`echo $elf_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
236 # Remove the leading slashes.
237 sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"
240 # Expand the list of system names into a full list of directories
241 # from each element's parent name and Implies file (if present).
244 while test $# -gt 0; do
248 case " $names " in *" $name "*)
249 # Already in the list.
253 # Report each name as we discover it, so there is no long pause in output.
254 echo $ac_n "$name $ac_c" >&AC_FD_MSG
256 if test -f $sysdep_dir/$name/Implies; then
257 # Collect more names from the `Implies' file (removing comments).
258 implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`"
259 for x in $implied; do
260 test -d $sysdep_dir/$x || {
261 AC_MSG_WARN(sysdeps/$name/Implies specifies nonexistent $x)
268 # Add NAME to the list of names.
271 # Find the parent of NAME, using the empty string if it has none.
273 parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==p'`"
276 # Add the names implied by NAME, and NAME's parent (if it has one), to
277 # the list of names to be processed (the argument list). We prepend the
278 # implied names to the list and append the parent. We want implied
279 # directories to come before further directories inferred from the
280 # configuration components; this ensures that for sysv4, unix/common
281 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
283 sysnames="`echo $implied $* $parent`"
284 test -n "$sysnames" && set $sysnames
287 # Add the default directories.
288 sysnames="$names generic stub"
290 # The other names were emitted during the scan.
291 AC_MSG_RESULT(generic stub)
297 if test "$INSTALL" = "${srcdir}/install-sh"; then
298 # The makefiles need to use a different form to find it in $srcdir.
299 INSTALL='$(..)./install-sh'
302 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
304 AC_CHECK_TOOL(CC, gcc)
305 if test $host != $build; then
306 AC_CHECK_PROG(BUILD_CC, gcc cc)
309 AC_CHECK_TOOL(AR, ar)
310 AC_CHECK_TOOL(RANLIB, ranlib, :)
312 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
313 echo '#include <stddef.h>
314 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
315 if eval "$ac_cpp conftest.c 2>/dev/null" \
316 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
317 libc_cv_signed_size_t=no
319 libc_cv_signed_size_t=yes
322 if test $libc_cv_signed_size_t = yes; then
323 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
324 cat >> confdefs.h <<\EOF
326 #define __SIZE_TYPE__ unsigned
330 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
332 [#define __need_size_t
333 #define __need_wchar_t
336 #include <stddef.h>], [size_t size; wchar_t wchar;
338 #error stddef.h ignored __need_*
340 if (&size == NULL || &wchar == NULL) abort ();],
341 libc_cv_friendly_stddef=yes,
342 libc_cv_friendly_stddef=no)])
343 if test $libc_cv_friendly_stddef = yes; then
344 config_vars="$config_vars
345 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
348 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
349 libc_cv_need_minus_P, [dnl
350 cat > conftest.S <<EOF
351 #include "confdefs.h"
352 /* Nothing whatsoever. */
354 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
355 libc_cv_need_minus_P=no
357 libc_cv_need_minus_P=yes
360 if test $libc_cv_need_minus_P = yes; then
361 config_vars="$config_vars
362 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
365 AC_CACHE_CHECK(for assembler global-symbol directive,
366 libc_cv_asm_global_directive, [dnl
367 libc_cv_asm_global_directive=UNKNOWN
368 for ac_globl in .globl .global; do
369 cat > conftest.s <<EOF
374 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
375 libc_cv_asm_global_directive=${ac_globl}
378 test $libc_cv_asm_global_directive != UNKNOWN && break
380 if test $libc_cv_asm_global_directive = UNKNOWN; then
381 AC_MSG_ERROR(cannot determine asm global directive)
383 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
386 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
387 cat > conftest.s <<EOF
390 .set glibc_conftest_frobozz,foo
391 $libc_cv_asm_global_directive glibc_conftest_frobozz
393 # The alpha-dec-osf1 assembler gives only a warning for `.set'
394 # (but it doesn't work), so we must do a linking check to be sure.
395 cat > conftest1.c <<\EOF
396 extern int glibc_conftest_frobozz;
397 main () { printf ("%d\n", glibc_conftest_frobozz); }
399 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
400 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
401 libc_cv_asm_set_directive=yes
403 libc_cv_asm_set_directive=no
406 if test $libc_cv_asm_set_directive = yes; then
407 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
410 if test $elf != yes; then
411 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
412 [AC_TRY_COMPILE(, [asm (".section .init");
413 asm (".section .fini");
415 libc_cv_have_initfini=yes,
416 libc_cv_have_initfini=no)])
417 AC_SUBST(libc_cv_have_initfini)dnl
418 if test $libc_cv_have_initfini = yes; then
419 AC_DEFINE(HAVE_INITFINI)
423 if test $elf = yes; then
424 libc_cv_asm_underscores=no
426 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
427 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
428 libc_cv_asm_underscores=yes,
429 libc_cv_asm_underscores=no)])
431 if test $libc_cv_asm_underscores = no; then
432 AC_DEFINE(NO_UNDERSCORES)
435 if test $elf = yes; then
436 libc_cv_weak_symbols=yes
437 libc_cv_asm_weak_directive=yes
438 libc_cv_asm_weakext_directive=no
440 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
442 cat > conftest.s <<EOF
444 ${libc_cv_asm_global_directive} foo
449 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
450 libc_cv_asm_weak_directive=yes
452 libc_cv_asm_weak_directive=no
456 if test $libc_cv_asm_weak_directive = no; then
457 AC_CACHE_CHECK(for assembler .weakext directive,
458 libc_cv_asm_weakext_directive,
460 cat > conftest.s <<EOF
462 ${libc_cv_asm_global_directive} foo
467 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
468 libc_cv_asm_weakext_directive=yes
470 libc_cv_asm_weakext_directive=no
477 if test $libc_cv_asm_weak_directive = yes; then
478 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
479 elif test $libc_cv_asm_weakext_directive = yes; then
480 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
483 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
484 cat > conftest.c <<\EOF
489 dnl No \ in command here because it ends up inside ''.
490 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
491 -nostdlib -nostartfiles -Wl,--no-whole-archive
492 -o conftest conftest.c]); then
493 libc_cv_ld_no_whole_archive=yes
495 libc_cv_ld_no_whole_archive=no
498 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
500 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
501 cat > conftest.c <<\EOF
506 dnl No \ in command here because it ends up inside ''.
507 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
508 -nostdlib -nostartfiles -fno-exceptions
509 -o conftest conftest.c]); then
510 libc_cv_gcc_no_exceptions=yes
512 libc_cv_gcc_no_exceptions=no
515 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
517 ### End of automated tests.
518 ### Now run sysdeps configure fragments.
520 # sysdeps configure fragments may set these with files to be linked below.
524 # Iterate over all the sysdep directories we will use, running their
525 # configure fragments, and looking for a uname implementation.
527 for dir in $sysnames; do
528 if test -r $sysdep_dir/$dir/configure; then
529 AC_MSG_RESULT(running configure fragment for $dir)
530 . $sysdep_dir/$dir/configure
533 if test -z "$uname"; then
534 if test -r $sysdep_dir/$dir/uname.c ||
535 test -r $sysdep_dir/$dir/uname.S ||
536 { test -r $sysdep_dir/$dir/syscalls.list &&
537 grep '^uname[ ]' $sysdep_dir/$dir/syscalls.list >/dev/null; }; then
544 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
546 # If we will use the generic uname implementation, we must figure out what
547 # it will say by examining the system, and write the results in config-name.h.
548 if test "$uname" = generic; then
551 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
553 if test $uname_sysname != $config_os; then
554 config_release=`echo $config_os | sed s/$uname_sysname//`
557 AC_DEFUN(LIBC_KERNEL_ID, [dnl
558 if test -r /vmunix; then
559 kernel_id=`strings /vmunix | grep UNIX`
560 elif test -r /dynix; then
561 kernel_id=`strings /dynix | grep DYNIX`
567 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
568 AC_REQUIRE([LIBC_KERNEL_ID])dnl
570 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
572 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
573 != x$config_release; then
574 # The configuration release is a substring of the kernel release.
575 libc_cv_uname_release=$kernel_release
576 elif test x$config_release != x; then
577 libc_cv_uname_release=$config_release
578 elif test x$kernel_release != x; then
579 libc_cv_uname_release=$kernel_release
581 libc_cv_uname_release=unknown
583 uname_release="$libc_cv_uname_release"
585 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
586 AC_REQUIRE([LIBC_KERNEL_ID])dnl
588 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
590 if test -n "$kernel_version"; then
591 libc_cv_uname_version="$kernel_version"
593 libc_cv_uname_version=unknown
595 uname_version="$libc_cv_uname_version"
597 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
598 config_uname=config-name.h:config-name.in
600 # For non-generic uname, we don't need to create config-name.h at all.
604 AC_MSG_CHECKING(stdio selection)
607 libio) AC_DEFINE(USE_IN_LIBIO) ;;
608 default) stdio=stdio ;;
610 AC_MSG_RESULT($stdio)
612 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
613 if test $gnu_ld = yes; then
614 AC_DEFINE(HAVE_GNU_LD)
616 if test $gnu_as = yes; then
617 AC_DEFINE(HAVE_GNU_AS)
619 if test $elf = yes; then
624 if test $shared = default; then
625 if test $gnu_ld = yes; then
632 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
635 config_makefile=Makefile
638 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
639 [echo '$config_vars' >> config.make])