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 AC_ARG_ENABLE(new-malloc, dnl
63 [ --enable-new-malloc use the new malloc implementation. This is the
64 default for Linux, others use the old malloc.],
65 [if test $enableval = yes; then
72 AC_ARG_ENABLE(sanity-checks, dnl
73 [ --disable-sanity-checks really do not use threads (should not be used
74 except in special situations) [default=yes]],
75 enable_sanity=$enableval, enable_sanity=yes)
77 dnl Arguments to enable or disable building the shared, profiled, and
78 dnl -fomit-frame-pointer libraries.
79 AC_ARG_ENABLE(shared, dnl
80 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
81 shared=$enableval, shared=default)
82 AC_ARG_ENABLE(profile, dnl
83 [ --enable-profile build profiled library [default=yes]],
84 profile=$enableval, profile=yes)
85 AC_ARG_ENABLE(omitfp, dnl
86 [ --enable-omitfp build undebuggable optimized library [default=no]],
87 omitfp=$enableval, omitfp=no)
89 dnl Generic infrastructure for drop-in additions to libc.
90 AC_ARG_ENABLE(add-ons, dnl
91 [ --enable-add-ons=DIR... configure and build named extra directories],
92 [add_ons=`echo "$enableval" | sed 's/,/ /g'`],
94 AC_CONFIG_SUBDIRS($add_ons)
96 if test x"$add_ons" != x; then
98 add_ons_pfx="$add_ons_pfx $f/"
104 # The way shlib-versions is used to generate soversions.mk uses a
105 # fairly simplistic model for name recognition that can't distinguish
106 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
107 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
108 # tell. This doesn't get used much beyond that, so it's fairly safe.
113 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
117 # We keep the original values in `$config_*' and never modify them, so we
118 # can write them unchanged into config.make. Everything else uses
119 # $machine, $vendor, and $os, and changes them whenever convenient.
120 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
122 # Some configurations imply other options.
124 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
125 # These systems always use GNU tools.
126 gnu_ld=yes gnu_as=yes ;;
131 gnu* | linux* | sysv4* | solaris2*)
132 # These systems (almost) always use the ELF format.
137 machine=$config_machine
138 vendor=$config_vendor
141 dnl We need to use [ and ] for other purposes for a while now.
143 # Expand the configuration machine name into a subdirectory by architecture
144 # type and particular chip.
146 a29k | am29000) base_machine=a29k machine=a29k ;;
147 alpha*) base_machine=alpha machine=alpha/$machine ;;
148 hppa*) base_machine=hppa machine=hppa/$machine ;;
149 i[3456]86) base_machine=i386 machine=i386/$machine ;;
150 m680?0) base_machine=m68k machine=m68k/$machine ;;
151 m68k) base_machine=m68k machine=m68k/m68020 ;;
152 m88???) base_machine=m88k machine=m88k/$machine ;;
153 m88k) base_machine=m88k machine=m88k/m88100 ;;
154 mips*) base_machine=mips machine=mips/$machine ;;
155 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
156 sparc[6789]) base_machine=sparc machine=sparc/$machine ;;
157 supersparc) base_machine=sparc machine=sparc/sparc8 ;;
160 AC_SUBST(base_machine)
162 # Compute the list of sysdep directories for this configuration.
163 # This can take a while to compute.
164 sysdep_dir=$srcdir/sysdeps
165 AC_MSG_CHECKING(sysdep dirs)
166 dnl We need to use [ and ] for other purposes for a while now.
168 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
169 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
174 netbsd* | 386bsd* | freebsd* | bsdi*)
175 base_os=unix/bsd/bsd4.4 ;;
176 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
178 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
181 base_os=unix/sysv/sysv4 ;;
183 base_os=standalone ;;
188 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
191 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
195 o=`echo $tail | sed 's/[0-9]*$//'`
196 if test $o != $tail; then
199 # For linux-gnu, try linux-gnu, then linux.
200 o=`echo $tail | sed 's/-.*$//'`
201 if test $o != $tail; then
205 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
208 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
214 # For sparc/sparc9, try sparc/sparc9 and then sparc.
217 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
219 # Prepend the machine's FPU directory unless --without-fp.
220 if test "$with_fp" = yes; then
227 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
230 # Find what sysdep directories exist.
232 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
233 for d in $add_ons_pfx ''; do
234 for b in $base ''; do
235 for m0 in $mach ''; do
236 for v in /$vendor ''; do
237 for o in /$ostry ''; do
238 for m in $mach ''; do
239 if test "$m0$b$v$o$m"; then
240 try="${d}sysdeps$m0$b$v$o$m"
241 test -n "$enable_debug_configure" &&
242 echo "$0 [DEBUG]: try $try" >&2
245 *) dest=$srcdir/$try ;;
247 if test -d $dest; then
248 sysnames="$sysnames $try"
249 { test -n "$o" || test -n "$b"; } && os_used=t
250 { test -n "$m" || test -n "$m0"; } && machine_used=t
261 if test -z "$os_used" && test "$os" != none; then
262 AC_MSG_ERROR(Operating system $os is not supported.)
264 if test -z "$machine_used" && test "$machine" != none; then
265 AC_MSG_ERROR(The $machine is not supported.)
268 # We have now validated the configuration.
271 # If using ELF, look for an `elf' subdirectory of each machine directory.
272 # We prepend these rather than inserting them whereever the machine appears
273 # because things specified by the machine's ELF ABI should override
274 # OS-specific things, and should always be the same for any OS on the
275 # machine (otherwise what's the point of an ABI?).
276 if test "$elf" = yes; then
278 for d in $add_ons_pfx ''; do
281 *) xsrcdir=$srcdir/ ;;
284 if test -d $xsrcdir${d}sysdeps$m/elf; then
285 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
289 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
293 # Expand the list of system names into a full list of directories
294 # from each element's parent name and Implies file (if present).
297 while test $# -gt 0; do
301 case " $names " in *" $name "*)
302 # Already in the list.
306 # Report each name as we discover it, so there is no long pause in output.
307 echo $ac_n "$name $ac_c" >&AC_FD_MSG
309 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
313 *) xsrcdir=$srcdir/ ;;
315 test -n "$enable_debug_configure" &&
316 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
318 if test -f $xsrcdir$name/Implies; then
319 # Collect more names from the `Implies' file (removing comments).
320 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
322 for x in $implied_candidate; do
323 if test -d $xsrcdir$name_base/$x; then
324 implied="$implied $name_base/$x";
326 AC_MSG_WARN($name/Implies specifies nonexistent $x)
333 # Add NAME to the list of names.
336 # Find the parent of NAME, using the empty string if it has none.
338 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
341 # Add the names implied by NAME, and NAME's parent (if it has one), to
342 # the list of names to be processed (the argument list). We prepend the
343 # implied names to the list and append the parent. We want implied
344 # directories to come before further directories inferred from the
345 # configuration components; this ensures that for sysv4, unix/common
346 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
348 sysnames="`echo $implied $* $parent`"
349 test -n "$sysnames" && set $sysnames
352 # Add the default directories.
353 sysnames="$names sysdeps/generic sysdeps/stub"
355 # The other names were emitted during the scan.
356 AC_MSG_RESULT(sysdeps/generic sysdeps/stub)
362 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
363 # The makefiles need to use a different form to find it in $srcdir.
364 INSTALL='$(..)./install-sh -c'
367 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
369 AC_CHECK_TOOL(CC, gcc)
370 if test $host != $build; then
371 AC_CHECK_PROG(BUILD_CC, gcc cc)
374 AC_CHECK_TOOL(AR, ar)
375 AC_CHECK_TOOL(RANLIB, ranlib, :)
377 AC_PATH_PROG(BASH, bash, no)
378 if test "$BASH" != no &&
379 $BASH -c 'test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
380 libc_cv_have_bash2=yes
382 libc_cv_have_bash2=no
384 AC_SUBST(libc_cv_have_bash2)
386 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
387 echo '#include <stddef.h>
388 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
389 if eval "$ac_cpp conftest.c 2>/dev/null" \
390 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
391 libc_cv_signed_size_t=no
393 libc_cv_signed_size_t=yes
396 if test $libc_cv_signed_size_t = yes; then
397 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
398 cat >> confdefs.h <<\EOF
400 #define __SIZE_TYPE__ unsigned
404 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
406 [#define __need_size_t
407 #define __need_wchar_t
410 #include <stddef.h>], [size_t size; wchar_t wchar;
412 #error stddef.h ignored __need_*
414 if (&size == NULL || &wchar == NULL) abort ();],
415 libc_cv_friendly_stddef=yes,
416 libc_cv_friendly_stddef=no)])
417 if test $libc_cv_friendly_stddef = yes; then
418 config_vars="$config_vars
419 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
422 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
423 libc_cv_need_minus_P, [dnl
424 cat > conftest.S <<EOF
425 #include "confdefs.h"
426 /* Nothing whatsoever. */
428 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
429 libc_cv_need_minus_P=no
431 libc_cv_need_minus_P=yes
434 if test $libc_cv_need_minus_P = yes; then
435 config_vars="$config_vars
436 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
439 AC_CACHE_CHECK(for assembler global-symbol directive,
440 libc_cv_asm_global_directive, [dnl
441 libc_cv_asm_global_directive=UNKNOWN
442 for ac_globl in .globl .global; do
443 cat > conftest.s <<EOF
448 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
449 libc_cv_asm_global_directive=${ac_globl}
452 test $libc_cv_asm_global_directive != UNKNOWN && break
454 if test $libc_cv_asm_global_directive = UNKNOWN; then
455 AC_MSG_ERROR(cannot determine asm global directive)
457 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
460 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
461 cat > conftest.s <<EOF
464 .set glibc_conftest_frobozz,foo
465 $libc_cv_asm_global_directive glibc_conftest_frobozz
467 # The alpha-dec-osf1 assembler gives only a warning for `.set'
468 # (but it doesn't work), so we must do a linking check to be sure.
469 cat > conftest1.c <<\EOF
470 extern int glibc_conftest_frobozz;
471 main () { printf ("%d\n", glibc_conftest_frobozz); }
473 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
474 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
475 libc_cv_asm_set_directive=yes
477 libc_cv_asm_set_directive=no
480 if test $libc_cv_asm_set_directive = yes; then
481 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
484 if test $elf != yes; then
485 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
486 [AC_TRY_COMPILE(, [asm (".section .init");
487 asm (".section .fini");
489 libc_cv_have_initfini=yes,
490 libc_cv_have_initfini=no)])
491 AC_SUBST(libc_cv_have_initfini)dnl
492 if test $libc_cv_have_initfini = yes; then
493 AC_DEFINE(HAVE_INITFINI)
497 if test $elf = yes; then
498 libc_cv_asm_underscores=no
500 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
501 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
502 libc_cv_asm_underscores=yes,
503 libc_cv_asm_underscores=no)])
505 if test $libc_cv_asm_underscores = no; then
506 AC_DEFINE(NO_UNDERSCORES)
509 if test $elf = yes; then
510 libc_cv_weak_symbols=yes
511 libc_cv_asm_weak_directive=yes
512 libc_cv_asm_weakext_directive=no
514 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
516 cat > conftest.s <<EOF
518 ${libc_cv_asm_global_directive} foo
523 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
524 libc_cv_asm_weak_directive=yes
526 libc_cv_asm_weak_directive=no
530 if test $libc_cv_asm_weak_directive = no; then
531 AC_CACHE_CHECK(for assembler .weakext directive,
532 libc_cv_asm_weakext_directive,
534 cat > conftest.s <<EOF
536 ${libc_cv_asm_global_directive} foo
541 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
542 libc_cv_asm_weakext_directive=yes
544 libc_cv_asm_weakext_directive=no
551 if test $libc_cv_asm_weak_directive = yes; then
552 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
553 elif test $libc_cv_asm_weakext_directive = yes; then
554 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
557 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
558 cat > conftest.c <<\EOF
563 dnl No \ in command here because it ends up inside ''.
564 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
565 -nostdlib -nostartfiles -Wl,--no-whole-archive
566 -o conftest conftest.c]); then
567 libc_cv_ld_no_whole_archive=yes
569 libc_cv_ld_no_whole_archive=no
572 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
574 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
575 cat > conftest.c <<\EOF
580 dnl No \ in command here because it ends up inside ''.
581 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
582 -nostdlib -nostartfiles -fno-exceptions
583 -o conftest conftest.c]); then
584 libc_cv_gcc_no_exceptions=yes
586 libc_cv_gcc_no_exceptions=no
589 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
591 ### End of automated tests.
592 ### Now run sysdeps configure fragments.
594 # sysdeps configure fragments may set these with files to be linked below.
598 # Iterate over all the sysdep directories we will use, running their
599 # configure fragments, and looking for a uname implementation.
601 for dir in $sysnames; do
604 *) dest=$srcdir/$dir ;;
606 if test -r $dest/configure; then
607 AC_MSG_RESULT(running configure fragment for $dest)
611 if test -z "$uname"; then
612 if test -r $sysdep_dir/$dir/uname.c ||
613 test -r $sysdep_dir/$dir/uname.S ||
614 { test -r $sysdep_dir/$dir/syscalls.list &&
615 grep '^uname[ ]' $sysdep_dir/$dir/syscalls.list >/dev/null; }; then
622 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
624 # If we will use the generic uname implementation, we must figure out what
625 # it will say by examining the system, and write the results in config-name.h.
626 if test "$uname" = generic; then
629 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
631 if test $uname_sysname != $config_os; then
632 config_release=`echo $config_os | sed s/$uname_sysname//`
635 AC_DEFUN(LIBC_KERNEL_ID, [dnl
636 if test -r /vmunix; then
637 kernel_id=`strings /vmunix | grep UNIX`
638 elif test -r /dynix; then
639 kernel_id=`strings /dynix | grep DYNIX`
645 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
646 AC_REQUIRE([LIBC_KERNEL_ID])dnl
648 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
650 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
651 != x$config_release; then
652 # The configuration release is a substring of the kernel release.
653 libc_cv_uname_release=$kernel_release
654 elif test x$config_release != x; then
655 libc_cv_uname_release=$config_release
656 elif test x$kernel_release != x; then
657 libc_cv_uname_release=$kernel_release
659 libc_cv_uname_release=unknown
661 uname_release="$libc_cv_uname_release"
663 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
664 AC_REQUIRE([LIBC_KERNEL_ID])dnl
666 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
668 if test -n "$kernel_version"; then
669 libc_cv_uname_version="$kernel_version"
671 libc_cv_uname_version=unknown
673 uname_version="$libc_cv_uname_version"
675 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
676 config_uname=config-name.h:config-name.in
678 # For non-generic uname, we don't need to create config-name.h at all.
682 AC_MSG_CHECKING(stdio selection)
685 libio) AC_DEFINE(USE_IN_LIBIO) ;;
686 default) stdio=stdio ;;
688 AC_MSG_RESULT($stdio)
690 AC_MSG_CHECKING(malloc selection)
693 new-malloc) USE_NEW_MALLOC=-DUSE_NEW_MALLOC ;;
694 default) malloc=malloc ;;
696 AC_SUBST(USE_NEW_MALLOC)
697 AC_MSG_RESULT($malloc)
700 AC_SUBST(libc_cv_slibdir)
701 AC_SUBST(libc_cv_sysconfdir)
703 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
704 if test $gnu_ld = yes; then
705 AC_DEFINE(HAVE_GNU_LD)
707 if test $gnu_as = yes; then
708 AC_DEFINE(HAVE_GNU_AS)
710 if test $elf = yes; then
715 if test $shared = default; then
716 if test $gnu_ld = yes; then
719 # For now we do not assume shared libs are available. In future more
720 # tests might become available.
729 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
732 config_makefile=Makefile
735 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
736 [echo '$config_vars' >> config.make])