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)
75 # We keep the original values in `$config_*' and never modify them, so we
76 # can write them unchanged into config.make. Everything else uses
77 # $machine, $vendor, and $os, and changes them whenever convenient.
78 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
80 # Some configurations imply other options.
82 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
83 # These systems always use GNU tools.
84 gnu_ld=yes gnu_as=yes ;;
87 gnu* | linux* | sysv4* | solaris2*)
88 # These systems always use the ELF format.
92 # Linux/Alpha does not use ELF yet.
93 case "$host_cpu-$host_os" in
98 machine=$config_machine
102 dnl We need to use [ and ] for other purposes for a while now.
104 # Expand the configuration machine name into a subdirectory by architecture
105 # type and particular chip.
107 a29k | am29000) base_machine=a29k machine=a29k ;;
108 alpha*) base_machine=alpha machine=alpha/$machine ;;
109 hppa*) base_machine=hppa machine=hppa/$machine ;;
110 i[345]86) base_machine=i386 machine=i386/$machine ;;
111 m680?0) base_machine=m68k machine=m68k/$machine ;;
112 m68k) base_machine=m68k machine=m68k/m68020 ;;
113 m88???) base_machine=m88k machine=m88k/$machine ;;
114 m88k) base_machine=m88k machine=m88k/m88100 ;;
115 mips*) base_machine=mips machine=mips/$machine ;;
116 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
117 sparc[6789]) base_machine=sparc machine=sparc/$machine ;;
118 supersparc) base_machine=sparc machine=sparc/sparc8 ;;
121 AC_SUBST(base_machine)
123 # Compute the list of sysdep directories for this configuration.
124 sysdep_dir=$srcdir/sysdeps
125 AC_CACHE_CHECK(sysdep dirs, libc_cv_sysdirs, [dnl
126 dnl We need to use [ and ] for other purposes for a while now.
128 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
129 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
134 netbsd* | 386bsd* | freebsd* | bsdi*)
135 base_os=unix/bsd/bsd4.4 ;;
136 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
138 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
141 base_os=unix/sysv/sysv4 ;;
143 base_os=standalone ;;
148 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
151 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
155 o=`echo $tail | sed 's/[0-9]*$//'`
156 if test $o != $tail; then
160 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
163 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
169 # For sparc/sparc9, try sparc/sparc9 and then sparc.
172 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
174 # Prepend the machine's FPU directory unless --without-fp.
175 if test "$with_fp" = yes; then
182 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
185 # Find what sysdep directories exist.
187 for b in $base ''; do
188 for m0 in $mach ''; do
189 for v in /$vendor ''; do
190 for o in /$ostry ''; do
191 for m in $mach ''; do
193 test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2
194 if test -d $sysdep_dir$try; then
195 sysnames="$sysnames $try"
196 { test -n "$o" || test -n "$b"; } && os_used=t
197 { test -n "$m" || test -n "$m0"; } && machine_used=t
205 if test -z "$os_used" && test "$os" != none; then
206 AC_MSG_ERROR(Operating system $os is not supported.)
208 if test -z "$machine_used" && test "$machine" != none; then
209 AC_MSG_ERROR(The $machine is not supported.)
212 # We have now validated the configuration.
215 # If using ELF, look for an `elf' subdirectory of each machine directory.
216 # We prepend these rather than inserting them whereever the machine appears
217 # because things specified by the machine's ELF ABI should override
218 # OS-specific things, and should always be the same for any OS on the
219 # machine (otherwise what's the point of an ABI?).
220 if test "$elf" = yes; then
223 if test -d $sysdep_dir$m/elf; then
224 elf_dirs="$elf_dirs $m/elf"
227 sysnames="`echo $elf_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
231 # Remove the leading slashes.
232 sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"
235 # Expand the list of system names into a full list of directories
236 # from each element's parent name and Implies file (if present).
238 while test $# -gt 0; do
242 if test -f $sysdep_dir/$name/Implies; then
243 # Collect more names from the `Implies' file (removing comments).
244 implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`"
245 for x in $implied; do
246 test -d $sysdep_dir/$x || echo "Warning: $name implies nonexistent $x">&2
252 # Add NAME to the list of names.
255 # Find the parent of NAME, using the empty string if it has none.
257 parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==p'`"
260 # Add the names implied by NAME, and NAME's parent (if it has one), to
261 # the list of names to be processed (the argument list). We prepend the
262 # implied names to the list and append the parent. We want implied
263 # directories to come before further directories inferred from the
264 # configuration components; this ensures that for sysv4, unix/common
265 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
267 sysnames="`echo $implied $* $parent`"
268 test -n "$sysnames" && set $sysnames
271 # Add the default directories.
272 names="$names generic stub"
274 # Now uniquize the list.
277 for name in $names; do
278 if echo "$seen" | fgrep -x $name >/dev/null; then
279 # Already in the list.
283 if test -z "$seen"; then
284 seen="$name" sysnames="$name"
288 sysnames="$sysnames $name"
292 libc_cv_sysdirs="$sysnames"])
293 AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs"
296 if test "$INSTALL" = "${srcdir}/install-sh"; then
297 # The makefiles need to use a different form to find it in $srcdir.
298 INSTALL='$(..)./install-sh'
301 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
303 AC_CHECK_TOOL(CC, gcc)
305 AC_CHECK_TOOL(AR, ar)
306 AC_CHECK_TOOL(RANLIB, ranlib, :)
307 AC_CHECK_TOOL(OBJDUMP, objdump)
308 AC_CHECK_TOOL(OBJCOPY, objcopy)
311 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
312 echo '#include <stddef.h>
313 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
314 if eval "$ac_cpp conftest.c 2>/dev/null" \
315 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
316 libc_cv_signed_size_t=no
318 libc_cv_signed_size_t=yes
321 if test $libc_cv_signed_size_t = yes; then
322 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
323 cat >> confdefs.h <<\EOF
325 #define __SIZE_TYPE__ unsigned
329 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
331 [#define __need_size_t
332 #define __need_wchar_t
335 #include <stddef.h>], [size_t size; wchar_t wchar;
337 #error stddef.h ignored __need_*
339 if (&size == NULL || &wchar == NULL) abort ();],
340 libc_cv_friendly_stddef=yes,
341 libc_cv_friendly_stddef=no)])
342 if test $libc_cv_friendly_stddef = yes; then
343 config_vars="$config_vars
344 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
347 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
348 libc_cv_need_minus_P, [dnl
349 cat > conftest.S <<EOF
350 #include "confdefs.h"
351 /* Nothing whatsoever. */
353 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
354 libc_cv_need_minus_P=no
356 libc_cv_need_minus_P=yes
359 if test $libc_cv_need_minus_P = yes; then
360 config_vars="$config_vars
361 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
364 AC_CACHE_CHECK(for assembler global-symbol directive,
365 libc_cv_asm_global_directive, [dnl
366 libc_cv_asm_global_directive=UNKNOWN
367 for ac_globl in .globl .global; do
368 cat > conftest.s <<EOF
373 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
374 libc_cv_asm_global_directive=${ac_globl}
377 test $libc_cv_asm_global_directive != UNKNOWN && break
379 if test $libc_cv_asm_global_directive = UNKNOWN; then
380 AC_MSG_ERROR(cannot determine asm global directive)
382 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
385 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
386 cat > conftest.s <<EOF
389 .set glibc_conftest_frobozz,foo
390 $libc_cv_asm_global_directive glibc_conftest_frobozz
392 # The alpha-dec-osf1 assembler gives only a warning for `.set'
393 # (but it doesn't work), so we must do a linking check to be sure.
394 cat > conftest1.c <<\EOF
395 extern int glibc_conftest_frobozz;
396 main () { printf ("%d\n", glibc_conftest_frobozz); }
398 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
399 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
400 libc_cv_asm_set_directive=yes
402 libc_cv_asm_set_directive=no
405 if test $libc_cv_asm_set_directive = yes; then
406 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
409 if test $elf != yes; then
410 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
411 [AC_TRY_COMPILE(, [asm (".section .init");
412 asm (".section .fini");],
413 libc_cv_have_initfini=yes,
414 libc_cv_have_initfini=no)])
415 AC_SUBST(libc_cv_have_initfini)dnl
416 if test $libc_cv_have_initfini = yes; then
417 AC_DEFINE(HAVE_INITFINI)
421 if test $elf = yes; then
422 libc_cv_asm_underscores=no
424 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
425 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
426 libc_cv_asm_underscores=yes,
427 libc_cv_asm_underscores=no)])
429 if test $libc_cv_asm_underscores = no; then
430 AC_DEFINE(NO_UNDERSCORES)
433 if test $elf = yes; then
434 libc_cv_weak_symbols=yes
435 libc_cv_asm_weak_directive=yes
436 libc_cv_asm_weakext_directive=no
438 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
440 cat > conftest.s <<EOF
442 ${libc_cv_asm_global_directive} foo
447 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
448 libc_cv_asm_weak_directive=yes
450 libc_cv_asm_weak_directive=no
454 if test $libc_cv_asm_weak_directive = no; then
455 AC_CACHE_CHECK(for assembler .weakext directive,
456 libc_cv_asm_weakext_directive,
458 cat > conftest.s <<EOF
460 ${libc_cv_asm_global_directive} foo
465 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
466 libc_cv_asm_weakext_directive=yes
468 libc_cv_asm_weakext_directive=no
475 if test $libc_cv_asm_weak_directive = yes; then
476 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
477 elif test $libc_cv_asm_weakext_directive = yes; then
478 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
481 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
482 cat > conftest.c <<\EOF
483 main () { exit (0); }
485 if ${CC-cc} $CFLAGS -Wl,--no-whole-archive \
486 -o conftest conftest.c 2>/dev/null; then
487 libc_cv_ld_no_whole_archive=yes
489 libc_cv_ld_no_whole_archive=no
492 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
494 ### End of automated tests.
495 ### Now run sysdeps configure fragments.
497 # sysdeps configure fragments may set these with files to be linked below.
501 # Iterate over all the sysdep directories we will use, running their
502 # configure fragments, and looking for a uname implementation.
504 for dir in $sysnames; do
505 if test -r $sysdep_dir/$dir/configure; then
506 AC_MSG_RESULT(running configure fragment for $dir)
507 . $sysdep_dir/$dir/configure
510 if test -z "$uname"; then
511 if test -r $sysdep_dir/$dir/uname.c ||
512 test -r $sysdep_dir/$dir/uname.S ||
513 { test -r $sysdep_dir/$dir/syscalls.list &&
514 grep '^uname[ ]' $sysdep_dir/$dir/syscalls.list >/dev/null; }; then
521 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
523 # If we will use the generic uname implementation, we must figure out what
524 # it will say by examining the system, and write the results in config-name.h.
525 if test "$uname" = generic; then
528 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
530 if test $uname_sysname != $config_os; then
531 config_release=`echo $config_os | sed s/$uname_sysname//`
534 AC_DEFUN(LIBC_KERNEL_ID, [dnl
535 if test -r /vmunix; then
536 kernel_id=`strings /vmunix | grep UNIX`
537 elif test -r /dynix; then
538 kernel_id=`strings /dynix | grep DYNIX`
544 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
545 AC_REQUIRE([LIBC_KERNEL_ID])dnl
547 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
549 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
550 != x$config_release; then
551 # The configuration release is a substring of the kernel release.
552 libc_cv_uname_release=$kernel_release
553 elif test x$config_release != x; then
554 libc_cv_uname_release=$config_release
555 elif test x$kernel_release != x; then
556 libc_cv_uname_release=$kernel_release
558 libc_cv_uname_release=unknown
560 uname_release="$libc_cv_uname_release"
562 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
563 AC_REQUIRE([LIBC_KERNEL_ID])dnl
565 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
567 if test -n "$kernel_version"; then
568 libc_cv_uname_version="$kernel_version"
570 libc_cv_uname_version=unknown
572 uname_version="$libc_cv_uname_version"
574 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
575 config_uname=config-name.h:config-name.in
577 # For non-generic uname, we don't need to create config-name.h at all.
581 AC_MSG_CHECKING(stdio selection)
584 libio) AC_DEFINE(USE_IN_LIBIO) ;;
585 default) stdio=stdio ;;
587 AC_MSG_RESULT($stdio)
589 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
590 if test $gnu_ld = yes; then
591 AC_DEFINE(HAVE_GNU_LD)
593 if test $gnu_as = yes; then
594 AC_DEFINE(HAVE_GNU_AS)
596 if test $elf = yes; then
601 if test $shared = default; then
602 if test $gnu_ld = yes; then
609 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
612 config_makefile=Makefile
615 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
616 [echo '$config_vars' >> config.make])