1 Dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.4.2)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 # Some configurations imply other options.
63 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
64 # These systems always use GNU tools.
68 gnu* | linux* | sysv4* | solaris2*)
69 # These systems always use the ELF format.
73 # Compute the list of sysdep directories for this configuration.
74 sysdep_dir=$srcdir/sysdeps
75 AC_CACHE_CHECK(sysdep dirs, libc_cv_sysdirs, [dnl
76 machine=$config_machine
80 dnl We need to use [ and ] for other purposes for a while now.
82 # Expand the configuration machine name into a subdirectory by architecture
83 # type and particular chip.
85 a29k | am29000) machine=a29k ;;
86 alpha*) machine=alpha/$machine ;;
87 hppa*) machine=hppa/$machine ;;
88 i[345]86) machine=i386/$machine ;;
89 m680?0) machine=m68k/$machine ;;
90 m68k) machine=m68k/m68020 ;;
91 m88???) machine=m88k/$machine ;;
92 m88k) machine=m88k/m88100 ;;
93 mips*) machine=mips/$machine ;;
94 mips64*) machine=mips/mips64/$machine ;;
95 sparc[6789]) machine=sparc/$machine ;;
96 supersparc) machine=sparc/sparc8 ;;
99 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
100 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
105 netbsd* | 386bsd* | freebsd* | bsdi*)
106 base_os=unix/bsd/bsd4.4 ;;
107 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
109 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
112 base_os=unix/sysv/sysv4 ;;
114 base_os=standalone ;;
119 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
122 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
126 o=`echo $tail | sed 's/[0-9]*$//'`
127 if test $o != $tail; then
131 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
134 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
140 # For sparc/sparc9, try sparc/sparc9 and then sparc.
143 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
145 # Prepend the machine's FPU directory unless --without-fp.
146 if test "$with_fp" = yes; then
153 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
156 # Find what sysdep directories exist.
158 for b in $base ''; do
159 for m0 in $mach ''; do
160 for v in /$vendor ''; do
161 for o in /$ostry ''; do
162 for m in $mach ''; do
164 test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2
165 if test -d $sysdep_dir$try; then
166 sysnames="$sysnames $try"
167 { test -n "$o" || test -n "$b"; } && os_used=t
168 { test -n "$m" || test -n "$m0"; } && machine_used=t
176 if test -z "$os_used" && test "$os" != none; then
177 AC_MSG_ERROR(Operating system $os is not supported.)
179 if test -z "$machine_used" && test "$machine" != none; then
180 AC_MSG_ERROR(The $machine is not supported.)
183 # We have now validated the configuration.
186 # If using ELF, look for an `elf' subdirectory of each machine directory.
187 # We prepend these rather than inserting them whereever the machine appears
188 # because things specified by the machine's ELF ABI should override
189 # OS-specific things, and should always be the same for any OS on the
190 # machine (otherwise what's the point of an ABI?).
191 if test "$elf" = yes; then
194 if test -d $sysdep_dir$m/elf; then
195 elf_dirs="$elf_dirs $m/elf"
198 sysnames="`echo $elf_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
202 # Remove the leading slashes.
203 sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"
206 # Expand the list of system names into a full list of directories
207 # from each element's parent name and Implies file (if present).
209 while test $# -gt 0; do
213 if test -f $sysdep_dir/$name/Implies; then
214 # Collect more names from the `Implies' file (removing comments).
215 implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`"
216 for x in $implied; do
217 test -d $sysdep_dir/$x || echo "Warning: $name implies nonexistent $x">&2
223 # Add NAME to the list of names.
226 # Find the parent of NAME, using the empty string if it has none.
228 parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==p'`"
231 # Add the names implied by NAME, and NAME's parent (if it has one), to
232 # the list of names to be processed (the argument list). We prepend the
233 # implied names to the list and append the parent. We want implied
234 # directories to come before further directories inferred from the
235 # configuration components; this ensures that for sysv4, unix/common
236 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
238 sysnames="`echo $implied $* $parent`"
239 test -n "$sysnames" && set $sysnames
242 # Add the default directories.
243 names="$names generic stub"
245 # Now uniquize the list.
248 for name in $names; do
249 if echo "$seen" | fgrep -x $name >/dev/null; then
250 # Already in the list.
254 if test -z "$seen"; then
255 seen="$name" sysnames="$name"
259 sysnames="$sysnames $name"
263 libc_cv_sysdirs="$sysnames"])
264 AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs"
267 if test "$INSTALL" = "${srcdir}/install-sh"; then
268 # The makefiles need to use a different form to find it in $srcdir.
269 INSTALL='$(..)./install-sh'
272 AC_CHECK_TOOL(CC, gcc)
273 AC_CHECK_TOOL(AR, ar)
274 AC_CHECK_TOOL(RANLIB, ranlib, :)
277 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
278 echo '#include <stddef.h>
279 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
280 if eval "$ac_cpp conftest.c 2>/dev/null" \
281 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
282 libc_cv_signed_size_t=no
284 libc_cv_signed_size_t=yes
287 if test $libc_cv_signed_size_t = yes; then
288 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
289 cat >> confdefs.h <<\EOF
291 #define __SIZE_TYPE__ unsigned
295 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
297 [#define __need_size_t
298 #define __need_wchar_t
301 #include <stddef.h>], [size_t size; wchar_t wchar;
303 #error stddef.h ignored __need_*
305 if (&size == NULL || &wchar == NULL) abort ();],
306 libc_cv_friendly_stddef=yes,
307 libc_cv_friendly_stddef=no)])
308 if test $libc_cv_friendly_stddef = yes; then
309 config_vars="$config_vars
310 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
313 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
314 libc_cv_need_minus_P, [dnl
315 cat > conftest.S <<EOF
316 #include "confdefs.h"
317 /* Nothing whatsoever. */
319 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
320 libc_cv_need_minus_P=no
322 libc_cv_need_minus_P=yes
325 if test $libc_cv_need_minus_P = yes; then
326 config_vars="$config_vars
327 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
330 AC_CACHE_CHECK(for assembler global-symbol directive,
331 libc_cv_asm_global_directive, [dnl
332 libc_cv_asm_global_directive=UNKNOWN
333 for ac_globl in .globl .global; do
334 cat > conftest.s <<EOF
339 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
340 libc_cv_asm_global_directive=${ac_globl}
343 test $libc_cv_asm_global_directive != UNKNOWN && break
345 if test $libc_cv_asm_global_directive = UNKNOWN; then
346 AC_MSG_ERROR(cannot determine asm global directive)
348 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
351 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
352 cat > conftest.s <<EOF
355 .set glibc_conftest_frobozz,foo
356 $libc_cv_asm_global_directive glibc_conftest_frobozz
358 # The alpha-dec-osf1 assembler gives only a warning for `.set'
359 # (but it doesn't work), so we must do a linking check to be sure.
360 cat > conftest1.c <<\EOF
361 extern int glibc_conftest_frobozz;
362 main () { printf ("%d\n", glibc_conftest_frobozz); }
364 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
365 conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
366 libc_cv_asm_set_directive=yes
368 libc_cv_asm_set_directive=no
371 if test $libc_cv_asm_set_directive = yes; then
372 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
375 if test $elf != yes; then
376 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
377 [AC_TRY_COMPILE(, [asm (".section .init");
378 asm (".section .fini");],
379 libc_cv_have_initfini=yes,
380 libc_cv_have_initfini=no)])
381 AC_SUBST(libc_cv_have_initfini)dnl
382 if test $libc_cv_have_initfini = yes; then
383 AC_DEFINE(HAVE_INITFINI)
387 # sysdeps configure fragments may set these with files to be linked below.
391 # Iterate over all the sysdep directories we will use, running their
392 # configure fragments, and looking for a uname implementation.
394 for dir in $sysnames; do
395 if test -r $sysdep_dir/$dir/configure; then
396 AC_MSG_RESULT(running configure fragment for $dir)
397 . $sysdep_dir/$dir/configure
399 if test -z "$uname"; then
400 { test -r $sysdep_dir/$dir/uname.c || test -r $sysdep_dir/$dir/uname.S; } \
405 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
407 # If we will use the generic uname implementation, we must figure out what
408 # it will say by examining the system, and write the results in config-name.h.
409 if test "$uname" = generic; then
412 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
414 if test $uname_sysname != $config_os; then
415 config_release=`echo $config_os | sed s/$uname_sysname//`
418 AC_DEFUN(LIBC_KERNEL_ID, [dnl
419 if test -r /vmunix; then
420 kernel_id=`strings /vmunix | grep UNIX`
421 elif test -r /dynix; then
422 kernel_id=`strings /dynix | grep DYNIX`
428 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
429 AC_REQUIRE([LIBC_KERNEL_ID])dnl
431 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
433 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
434 != x$config_release; then
435 # The configuration release is a substring of the kernel release.
436 libc_cv_uname_release=$kernel_release
437 elif test x$config_release != x; then
438 libc_cv_uname_release=$config_release
439 elif test x$kernel_release != x; then
440 libc_cv_uname_release=$kernel_release
442 libc_cv_uname_release=unknown
444 uname_release="$libc_cv_uname_release"
446 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
447 AC_REQUIRE([LIBC_KERNEL_ID])dnl
449 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
451 if test -n "$kernel_version"; then
452 libc_cv_uname_version="$kernel_version"
454 libc_cv_uname_version=unknown
456 uname_version="$libc_cv_uname_version"
458 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
459 config_uname=config-name.h:config-name.in
461 # For non-generic uname, we don't need to create config-name.h at all.
465 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(weak)
466 if test $gnu_ld = yes; then
467 AC_DEFINE(HAVE_GNU_LD)
469 if test $gnu_as = yes; then
470 AC_DEFINE(HAVE_GNU_AS)
472 if test $elf = yes; then
475 if test $weak = yes; then
476 AC_DEFINE(HAVE_WEAK_SYMBOLS)
480 if test $shared = default; then
481 if test $gnu_ld = yes; then
489 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
492 config_makefile=Makefile
495 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
496 [echo '$config_vars' >> config.make])