1 Dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.9)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 = $withval" ;;
35 dnl Arguments to specify presence of other packages/features.
37 --with-fp if using floating-point hardware,
38 with_fp=$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 # Compute the list of sysdep directories for this configuration.
99 sysdep_dir=$srcdir/sysdeps
100 AC_CACHE_CHECK(sysdep dirs, libc_cv_sysdirs, [dnl
101 machine=$config_machine
102 vendor=$config_vendor
105 dnl We need to use [ and ] for other purposes for a while now.
107 # Expand the configuration machine name into a subdirectory by architecture
108 # type and particular chip.
110 a29k | am29000) machine=a29k ;;
111 alpha*) machine=alpha/$machine ;;
112 hppa*) machine=hppa/$machine ;;
113 i[345]86) machine=i386/$machine ;;
114 m680?0) machine=m68k/$machine ;;
115 m68k) machine=m68k/m68020 ;;
116 m88???) machine=m88k/$machine ;;
117 m88k) machine=m88k/m88100 ;;
118 mips*) machine=mips/$machine ;;
119 mips64*) machine=mips/mips64/$machine ;;
120 sparc[6789]) machine=sparc/$machine ;;
121 supersparc) machine=sparc/sparc8 ;;
124 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
125 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
130 netbsd* | 386bsd* | freebsd* | bsdi*)
131 base_os=unix/bsd/bsd4.4 ;;
132 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
134 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
137 base_os=unix/sysv/sysv4 ;;
139 base_os=standalone ;;
144 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
147 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
151 o=`echo $tail | sed 's/[0-9]*$//'`
152 if test $o != $tail; then
156 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
159 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
165 # For sparc/sparc9, try sparc/sparc9 and then sparc.
168 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
170 # Prepend the machine's FPU directory unless --without-fp.
171 if test "$with_fp" = yes; then
178 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
181 # Find what sysdep directories exist.
183 for b in $base ''; do
184 for m0 in $mach ''; do
185 for v in /$vendor ''; do
186 for o in /$ostry ''; do
187 for m in $mach ''; do
189 test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2
190 if test -d $sysdep_dir$try; then
191 sysnames="$sysnames $try"
192 { test -n "$o" || test -n "$b"; } && os_used=t
193 { test -n "$m" || test -n "$m0"; } && machine_used=t
201 if test -z "$os_used" && test "$os" != none; then
202 AC_MSG_ERROR(Operating system $os is not supported.)
204 if test -z "$machine_used" && test "$machine" != none; then
205 AC_MSG_ERROR(The $machine is not supported.)
208 # We have now validated the configuration.
211 # If using ELF, look for an `elf' subdirectory of each machine directory.
212 # We prepend these rather than inserting them whereever the machine appears
213 # because things specified by the machine's ELF ABI should override
214 # OS-specific things, and should always be the same for any OS on the
215 # machine (otherwise what's the point of an ABI?).
216 if test "$elf" = yes; then
219 if test -d $sysdep_dir$m/elf; then
220 elf_dirs="$elf_dirs $m/elf"
223 sysnames="`echo $elf_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
227 # Remove the leading slashes.
228 sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"
231 # Expand the list of system names into a full list of directories
232 # from each element's parent name and Implies file (if present).
234 while test $# -gt 0; do
238 if test -f $sysdep_dir/$name/Implies; then
239 # Collect more names from the `Implies' file (removing comments).
240 implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`"
241 for x in $implied; do
242 test -d $sysdep_dir/$x || echo "Warning: $name implies nonexistent $x">&2
248 # Add NAME to the list of names.
251 # Find the parent of NAME, using the empty string if it has none.
253 parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==p'`"
256 # Add the names implied by NAME, and NAME's parent (if it has one), to
257 # the list of names to be processed (the argument list). We prepend the
258 # implied names to the list and append the parent. We want implied
259 # directories to come before further directories inferred from the
260 # configuration components; this ensures that for sysv4, unix/common
261 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
263 sysnames="`echo $implied $* $parent`"
264 test -n "$sysnames" && set $sysnames
267 # Add the default directories.
268 names="$names generic stub"
270 # Now uniquize the list.
273 for name in $names; do
274 if echo "$seen" | fgrep -x $name >/dev/null; then
275 # Already in the list.
279 if test -z "$seen"; then
280 seen="$name" sysnames="$name"
284 sysnames="$sysnames $name"
288 libc_cv_sysdirs="$sysnames"])
289 AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs"
292 if test "$INSTALL" = "${srcdir}/install-sh"; then
293 # The makefiles need to use a different form to find it in $srcdir.
294 INSTALL='$(..)./install-sh'
297 AC_CHECK_TOOL(CC, gcc)
298 AC_CHECK_TOOL(AR, ar)
299 AC_CHECK_TOOL(RANLIB, ranlib, :)
302 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
303 echo '#include <stddef.h>
304 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
305 if eval "$ac_cpp conftest.c 2>/dev/null" \
306 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
307 libc_cv_signed_size_t=no
309 libc_cv_signed_size_t=yes
312 if test $libc_cv_signed_size_t = yes; then
313 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
314 cat >> confdefs.h <<\EOF
316 #define __SIZE_TYPE__ unsigned
320 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
322 [#define __need_size_t
323 #define __need_wchar_t
326 #include <stddef.h>], [size_t size; wchar_t wchar;
328 #error stddef.h ignored __need_*
330 if (&size == NULL || &wchar == NULL) abort ();],
331 libc_cv_friendly_stddef=yes,
332 libc_cv_friendly_stddef=no)])
333 if test $libc_cv_friendly_stddef = yes; then
334 config_vars="$config_vars
335 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
338 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
339 libc_cv_need_minus_P, [dnl
340 cat > conftest.S <<EOF
341 #include "confdefs.h"
342 /* Nothing whatsoever. */
344 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
345 libc_cv_need_minus_P=no
347 libc_cv_need_minus_P=yes
350 if test $libc_cv_need_minus_P = yes; then
351 config_vars="$config_vars
352 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
355 AC_CACHE_CHECK(for assembler global-symbol directive,
356 libc_cv_asm_global_directive, [dnl
357 libc_cv_asm_global_directive=UNKNOWN
358 for ac_globl in .globl .global; do
359 cat > conftest.s <<EOF
364 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
365 libc_cv_asm_global_directive=${ac_globl}
368 test $libc_cv_asm_global_directive != UNKNOWN && break
370 if test $libc_cv_asm_global_directive = UNKNOWN; then
371 AC_MSG_ERROR(cannot determine asm global directive)
373 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
376 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
377 cat > conftest.s <<EOF
380 .set glibc_conftest_frobozz,foo
381 $libc_cv_asm_global_directive glibc_conftest_frobozz
383 # The alpha-dec-osf1 assembler gives only a warning for `.set'
384 # (but it doesn't work), so we must do a linking check to be sure.
385 cat > conftest1.c <<\EOF
386 extern int glibc_conftest_frobozz;
387 main () { printf ("%d\n", glibc_conftest_frobozz); }
389 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
390 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
391 libc_cv_asm_set_directive=yes
393 libc_cv_asm_set_directive=no
396 if test $libc_cv_asm_set_directive = yes; then
397 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
400 if test $elf != yes; then
401 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
402 [AC_TRY_COMPILE(, [asm (".section .init");
403 asm (".section .fini");],
404 libc_cv_have_initfini=yes,
405 libc_cv_have_initfini=no)])
406 AC_SUBST(libc_cv_have_initfini)dnl
407 if test $libc_cv_have_initfini = yes; then
408 AC_DEFINE(HAVE_INITFINI)
412 if test $elf = yes; then
413 libc_cv_asm_underscores=no
415 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
416 [AC_TRY_COMPILE([asm ("_glibc_foobar:");], [glibc_foobar ();],
417 libc_cv_asm_underscores=yes,
418 libc_cv_asm_underscores=no)])
420 if test $libc_cv_asm_underscores = no; then
421 AC_DEFINE(NO_UNDERSCORES)
424 if test $elf = yes; then
425 libc_cv_weak_symbols=yes
426 libc_cv_asm_weak_directive=yes
427 libc_cv_asm_weakext_directive=no
429 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
431 cat > conftest.s <<EOF
433 ${libc_cv_asm_global_directive} foo
438 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
439 libc_cv_asm_weak_directive=yes
441 libc_cv_asm_weak_directive=no
445 if test $libc_cv_asm_weak_directive = no; then
446 AC_CACHE_CHECK(for assembler .weakext directive,
447 libc_cv_asm_weakext_directive,
449 cat > conftest.s <<EOF
451 ${libc_cv_asm_global_directive} foo
456 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
457 libc_cv_asm_weakext_directive=yes
459 libc_cv_asm_weakext_directive=no
466 if test $libc_cv_asm_weak_directive; then
467 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
468 elif test $libc_cv_asm_weakext_directive; then
469 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
472 ### End of automated tests.
473 ### Now run sysdeps configure fragments.
475 # sysdeps configure fragments may set these with files to be linked below.
479 # Iterate over all the sysdep directories we will use, running their
480 # configure fragments, and looking for a uname implementation.
482 for dir in $sysnames; do
483 if test -r $sysdep_dir/$dir/configure; then
484 AC_MSG_RESULT(running configure fragment for $dir)
485 . $sysdep_dir/$dir/configure
488 if test -z "$uname"; then
489 if test -r $sysdep_dir/$dir/uname.c ||
490 test -r $sysdep_dir/$dir/uname.S ||
491 { test -r $sysdep_dir/$dir/syscalls.list &&
492 grep '^uname[ ]' $sysdep_dir/$dir/syscalls.list >/dev/null; }; then
499 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
501 # If we will use the generic uname implementation, we must figure out what
502 # it will say by examining the system, and write the results in config-name.h.
503 if test "$uname" = generic; then
506 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
508 if test $uname_sysname != $config_os; then
509 config_release=`echo $config_os | sed s/$uname_sysname//`
512 AC_DEFUN(LIBC_KERNEL_ID, [dnl
513 if test -r /vmunix; then
514 kernel_id=`strings /vmunix | grep UNIX`
515 elif test -r /dynix; then
516 kernel_id=`strings /dynix | grep DYNIX`
522 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
523 AC_REQUIRE([LIBC_KERNEL_ID])dnl
525 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
527 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
528 != x$config_release; then
529 # The configuration release is a substring of the kernel release.
530 libc_cv_uname_release=$kernel_release
531 elif test x$config_release != x; then
532 libc_cv_uname_release=$config_release
533 elif test x$kernel_release != x; then
534 libc_cv_uname_release=$kernel_release
536 libc_cv_uname_release=unknown
538 uname_release="$libc_cv_uname_release"
540 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
541 AC_REQUIRE([LIBC_KERNEL_ID])dnl
543 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
545 if test -n "$kernel_version"; then
546 libc_cv_uname_version="$kernel_version"
548 libc_cv_uname_version=unknown
550 uname_version="$libc_cv_uname_version"
552 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
553 config_uname=config-name.h:config-name.in
555 # For non-generic uname, we don't need to create config-name.h at all.
559 AC_MSG_CHECKING(stdio selection)
562 libio) AC_DEFINE(USE_IN_LIBIO) ;;
563 default) stdio=stdio ;;
565 AC_MSG_RESULT($stdio)
567 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
568 if test $gnu_ld = yes; then
569 AC_DEFINE(HAVE_GNU_LD)
571 if test $gnu_as = yes; then
572 AC_DEFINE(HAVE_GNU_AS)
574 if test $elf = yes; then
579 if test $shared = default; then
580 if test $gnu_ld = yes; then
587 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
590 config_makefile=Makefile
593 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
594 [echo '$config_vars' >> config.make])