1 dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.2)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 = $withval" ;;
22 dnl Arguments to specify presence of other packages/features.
24 --with-fp if using floating-point hardware,
25 with_fp=$withval, with_fp=yes)
26 AC_ARG_WITH(gnu-binutils, dnl
27 --with-gnu-binutils if using GNU binutils (as and ld),
28 gnu_binutils=$withval, gnu_binutils=no)
29 AC_ARG_WITH(gnu-ld, dnl
30 --with-gnu-ld if using GNU ld (in the binutils package),
31 gnu_ld=$withval, gnu_ld=no)
32 AC_ARG_WITH(gnu-as, dnl
33 --with-gnu-as if using GNU as (in the binutils package),
34 gnu_as=$withval, gnu_as=no)
35 test $gnu_binutils = yes && gnu_as=yes gnu_ld=yes
37 --with-elf if using the ELF object format,
39 AC_ARG_WITH(weak-symbols, dnl
40 --with-weak-symbols if weak symbols are available in as and ld,
41 weak=$withval, weak=no)
43 dnl Arguments to enable or disable building the shared, profiled, and
44 dnl -fomit-frame-pointer libraries.
45 AC_ARG_ENABLE(shared, dnl
46 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
47 shared=$enableval, shared=default)
48 AC_ARG_ENABLE(profile, dnl
49 [ --enable-profile build profiled library [default=yes]],
50 profile=$enableval, profile=yes)
51 AC_ARG_ENABLE(omitfp, dnl
52 [ --enable-omitfp build undebuggable optimized library [default=no]],
53 omitfp=$enableval, omitfp=no)
56 # We keep the original values in `$config_*' and never modify them, so we
57 # can write them unchanged into config.make. Everything else uses
58 # $machine, $vendor, and $os, and changes them whenever convenient.
59 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
61 sysdep_dir=$srcdir/sysdeps
62 AC_MSG_CHECKING(sysdep dirs)
63 AC_CACHE_VAL(libc_cv_sysdirs, [dnl
64 machine=$config_machine
68 dnl We need to use [ and ] for other purposes for a while now.
70 # Expand the configuration machine name into a subdirectory by architecture
71 # type and particular chip.
74 machine=i386/$machine ;;
76 machine=sparc/$machine ;;
78 machine=m68k/m68020 ;;
80 machine=m68k/$machine ;;
82 machine=m88k/m88100 ;;
84 machine=m88k/$machine ;;
86 machine=mips/mips64/$machine ;;
88 machine=mips/$machine ;;
91 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
92 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
97 netbsd* | 386bsd* | freebsd* | bsdi*)
98 base_os=unix/bsd/bsd4.4 ;;
99 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
101 linux* | sysv* | isc* | esix* | sco* | minix* | irix4*)
104 base_os=unix/sysv/sysv4 ;;
106 base_os=standalone ;;
111 # Some configurations imply other options.
113 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
114 # These systems always use GNU tools.
115 gnu_ld=yes gnu_as=yes
118 gnu*elf* | linux* | sysv4* | solaris2*)
119 # These systems always use the ELF format.
124 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
127 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
131 o=`echo $tail | sed 's/[0-9]*$//'`
132 if test $o != $tail; then
136 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
139 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
145 # For sparc/sparc9, try sparc/sparc9 and then sparc.
148 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
150 # Prepend the machine's FPU directory unless --without-fp.
151 if test "$with_fp" = yes; then
158 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
161 # Find what sysdep directories exist.
163 for b in $base ''; do
164 for m0 in $mach ''; do
165 for v in /$vendor ''; do
166 for o in /$ostry ''; do
167 for m in $mach ''; do
169 if test -d $sysdep_dir$try; then
170 sysnames="$sysnames $try"
171 { test -n "$o" || test -n "$b"; } && os_used=t
172 { test -n "$m" || test -n "$m0"; } && machine_used=t
180 if test -z "$os_used" && test "$os" != none; then
181 AC_MSG_ERROR(Operating system $os is not supported.)
183 if test -z "$machine_used" && test "$machine" != none; then
184 AC_MSG_ERROR(The $machine is not supported.)
187 # We have now validated the configuration.
190 # If using ELF, look for an `elf' subdirectory of each machine directory.
191 # We prepend these rather than inserting them whereever the machine appears
192 # because things specified by the machine's ELF ABI should override
193 # OS-specific things, and should always be the same for any OS on the
194 # machine (otherwise what's the point of an ABI?).
195 if test "$elf" = yes; then
198 if test -d $sysdep_dir$m/elf; then
199 elf_dirs="$elf_dirs $m/elf"
202 sysnames="`echo $elf_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
206 # Remove the leading slashes.
207 sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"
210 # Expand the list of system names into a full list of directories
211 # from each element's parent name and Implies file (if present).
213 while test $# -gt 0; do
217 if test -f $sysdep_dir/$name/Implies; then
218 # Collect more names from the `Implies' file (removing comments).
219 implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`"
220 for x in $implied; do
221 test -d $sysdep_dir/$x || echo "Warning: $name implies nonexistent $x">&2
227 # Add NAME to the list of names.
230 # Find the parent of NAME, using the empty string if it has none.
232 parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==p'`"
235 # Add the names implied by NAME, and NAME's parent (if it has one), to
236 # the list of names to be processed (the argument list). We prepend the
237 # implied names to the list and append the parent. We want implied
238 # directories to come before further directories inferred from the
239 # configuration components; this ensures that for sysv4, unix/common
240 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
242 sysnames="`echo $implied $* $parent`"
243 test -n "$sysnames" && set $sysnames
246 # Add the default directories.
247 names="$names generic stub"
249 # Now uniquize the list.
252 for name in $names; do
253 if echo "$seen" | fgrep -x $name >/dev/null; then
254 # Already in the list.
258 if test -z "$seen"; then
259 seen="$name" sysnames="$name"
263 sysnames="$sysnames $name"
267 libc_cv_sysdirs="$sysnames"])
268 AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs"
269 AC_MSG_RESULT(${sysnames})
272 if test "$INSTALL" = "${srcdir}/install-sh"; then
273 # The makefiles need to use a different form to find it in $srcdir.
274 INSTALL='$(..)./install-sh'
277 AC_CHECK_TOOL(CC, gcc)
278 AC_CHECK_TOOL(AR, ar)
279 AC_CHECK_TOOL(RANLIB, ranlib, :)
282 AC_MSG_CHECKING(signed size_t type)
283 AC_CACHE_VAL(libc_cv_signed_size_t, [dnl
284 echo '#include <stddef.h>
285 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
286 if eval "$ac_cpp conftest.c 2>/dev/null" \
287 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
288 libc_cv_signed_size_t=no
290 libc_cv_signed_size_t=yes
293 AC_MSG_RESULT($libc_cv_signed_size_t)
294 if test $libc_cv_signed_size_t = yes; then
295 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
296 cat >> confdefs.h <<\EOF
298 #define __SIZE_TYPE__ unsigned
302 AC_MSG_CHECKING(libc-friendly stddef.h)
303 AC_CACHE_VAL(libc_cv_friendly_stddef, [dnl
305 [#define __need_size_t
306 #define __need_wchar_t
309 #include <stddef.h>], [size_t size; wchar_t wchar;
311 #error stddef.h ignored __need_*
313 if (&size == NULL || &wchar == NULL) abort ();],
314 libc_cv_friendly_stddef=yes,
315 libc_cv_friendly_stddef=no)])
316 AC_MSG_RESULT($libc_cv_friendly_stddef)
317 if test $libc_cv_friendly_stddef = yes; then
318 config_vars="$config_vars
319 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
322 AC_MSG_CHECKING(whether we need to use -P to assemble .S files)
323 AC_CACHE_VAL(libc_cv_need_minus_P, [dnl
324 cat > conftest.S <<EOF
325 #include "confdefs.h"
326 /* Nothing whatsoever. */
328 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
329 libc_cv_need_minus_P=no
331 libc_cv_need_minus_P=yes
334 AC_MSG_RESULT($libc_cv_need_minus_P)
335 if test $libc_cv_need_minus_P = yes; then
336 config_vars="$config_vars
337 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
340 AC_MSG_CHECKING(for .set assembler directive)
341 AC_CACHE_VAL(libc_cv_asm_set_directive, [dnl
342 cat > conftest.s <<\EOF
347 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
348 libc_cv_asm_set_directive=yes
350 libc_cv_asm_set_directive=no
353 AC_MSG_RESULT($libc_cv_asm_set_directive)
354 if test $libc_cv_asm_set_directive = yes; then
355 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
358 AC_MSG_CHECKING(for assembler global-symbol directive)
359 AC_CACHE_VAL(libc_cv_asm_global_directive, [dnl
360 libc_cv_asm_global_directive=UNKNOWN
361 for ac_globl in .globl .global; do
362 cat > conftest.s <<EOF
367 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
368 libc_cv_asm_global_directive=${ac_globl}
371 test $libc_cv_asm_global_directive != UNKNOWN && break
373 AC_MSG_RESULT($libc_cv_asm_global_directive)
374 if test $libc_cv_asm_global_directive = UNKNOWN; then
375 AC_MSG_ERROR(cannot determine asm global directive)
377 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
381 # sysdeps configure fragments may set these with files to be linked below.
385 # Iterate over all the sysdep directories we will use, running their
386 # configure fragments, and looking for a uname implementation.
388 for dir in $sysnames; do
389 if test -r $sysdep_dir/$dir/configure; then
390 AC_MSG_RESULT(running configure fragment for $dir)
391 . $sysdep_dir/$dir/configure
393 if test -z "$uname"; then
394 { test -r $sysdep_dir/$dir/uname.c || test -r $sysdep_dir/$dir/uname.S; } \
399 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
401 # If we will use the generic uname implementation, we must figure out what
402 # it will say by examining the system, and write the results in config-name.h.
403 if test "$uname" = generic; then
406 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
408 if test $uname_sysname != $config_os; then
409 config_release=`echo $config_os | sed s/$uname_sysname//`
412 AC_DEFUN(LIBC_KERNEL_ID, [dnl
413 if test -r /vmunix; then
414 kernel_id=`strings /vmunix | grep UNIX`
415 elif test -r /dynix; then
416 kernel_id=`strings /dynix | grep DYNIX`
422 AC_MSG_CHECKING(OS release for uname)
423 AC_CACHE_VAL(libc_cv_uname_release, [dnl
424 AC_REQUIRE([LIBC_KERNEL_ID])dnl
426 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
428 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
429 != x$config_release; then
430 # The configuration release is a substring of the kernel release.
431 libc_cv_uname_release=$kernel_release
432 elif test x$config_release != x; then
433 libc_cv_uname_release=$config_release
434 elif test x$kernel_release != x; then
435 libc_cv_uname_release=$kernel_release
437 libc_cv_uname_release=unknown
439 AC_MSG_RESULT($libc_cv_uname_release)
440 uname_release="$libc_cv_uname_release"
442 AC_MSG_CHECKING(OS version for uname)
443 AC_CACHE_VAL(libc_cv_uname_version, [dnl
444 AC_REQUIRE([LIBC_KERNEL_ID])dnl
446 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
448 if test -n "$kernel_version"; then
449 libc_cv_uname_version="$kernel_version"
451 libc_cv_uname_version=unknown
453 AC_MSG_RESULT($libc_cv_uname_version)
454 uname_version="$libc_cv_uname_version"
456 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
457 config_uname=config-name.h:config-name.in
459 # For non-generic uname, we don't need to create config-name.h at all.
463 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(weak)
464 if test $gnu_ld = yes; then
465 AC_DEFINE(HAVE_GNU_LD)
467 if test $gnu_as = yes; then
468 AC_DEFINE(HAVE_GNU_AS)
470 if test $elf = yes; then
473 if test $weak = yes; then
474 AC_DEFINE(HAVE_WEAK_SYMBOLS)
478 if test $shared = default; then
479 if test $gnu_ld = yes; then
487 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
490 config_makefile=Makefile
493 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
494 [echo '$config_vars' >> config.make])