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 = $withval" ;;
21 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
22 AC_ARG_WITH(gettext, dnl
23 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
25 case "$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 $gnu_binutils = yes && gnu_as=yes gnu_ld=yes
50 --with-elf if using the ELF object format,
52 AC_ARG_WITH(weak-symbols, dnl
53 --with-weak-symbols if weak symbols are available in as and ld,
54 weak=$withval, weak=no)
56 AC_ARG_ENABLE(libio, dnl
57 [ --enable-libio build in GNU libio instead of GNU stdio],
58 stdio=libio, stdio=default)
60 dnl Arguments to enable or disable building the shared, profiled, and
61 dnl -fomit-frame-pointer libraries.
62 AC_ARG_ENABLE(shared, dnl
63 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
64 shared=$enableval, shared=default)
65 AC_ARG_ENABLE(profile, dnl
66 [ --enable-profile build profiled library [default=yes]],
67 profile=$enableval, profile=yes)
68 AC_ARG_ENABLE(omitfp, dnl
69 [ --enable-omitfp build undebuggable optimized library [default=no]],
70 omitfp=$enableval, omitfp=no)
73 # We keep the original values in `$config_*' and never modify them, so we
74 # can write them unchanged into config.make. Everything else uses
75 # $machine, $vendor, and $os, and changes them whenever convenient.
76 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
78 # Some configurations imply other options.
80 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
81 # These systems always use GNU tools.
85 gnu* | linux* | sysv4* | solaris2*)
86 # These systems always use the ELF format.
90 # Compute the list of sysdep directories for this configuration.
91 sysdep_dir=$srcdir/sysdeps
92 AC_CACHE_CHECK(sysdep dirs, libc_cv_sysdirs, [dnl
93 machine=$config_machine
97 dnl We need to use [ and ] for other purposes for a while now.
99 # Expand the configuration machine name into a subdirectory by architecture
100 # type and particular chip.
102 a29k | am29000) machine=a29k ;;
103 alpha*) machine=alpha/$machine ;;
104 hppa*) machine=hppa/$machine ;;
105 i[345]86) machine=i386/$machine ;;
106 m680?0) machine=m68k/$machine ;;
107 m68k) machine=m68k/m68020 ;;
108 m88???) machine=m88k/$machine ;;
109 m88k) machine=m88k/m88100 ;;
110 mips*) machine=mips/$machine ;;
111 mips64*) machine=mips/mips64/$machine ;;
112 sparc[6789]) machine=sparc/$machine ;;
113 supersparc) machine=sparc/sparc8 ;;
116 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
117 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
122 netbsd* | 386bsd* | freebsd* | bsdi*)
123 base_os=unix/bsd/bsd4.4 ;;
124 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
126 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
129 base_os=unix/sysv/sysv4 ;;
131 base_os=standalone ;;
136 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
139 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
143 o=`echo $tail | sed 's/[0-9]*$//'`
144 if test $o != $tail; then
148 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
151 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
157 # For sparc/sparc9, try sparc/sparc9 and then sparc.
160 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
162 # Prepend the machine's FPU directory unless --without-fp.
163 if test "$with_fp" = yes; then
170 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
173 # Find what sysdep directories exist.
175 for b in $base ''; do
176 for m0 in $mach ''; do
177 for v in /$vendor ''; do
178 for o in /$ostry ''; do
179 for m in $mach ''; do
181 test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2
182 if test -d $sysdep_dir$try; then
183 sysnames="$sysnames $try"
184 { test -n "$o" || test -n "$b"; } && os_used=t
185 { test -n "$m" || test -n "$m0"; } && machine_used=t
193 if test -z "$os_used" && test "$os" != none; then
194 AC_MSG_ERROR(Operating system $os is not supported.)
196 if test -z "$machine_used" && test "$machine" != none; then
197 AC_MSG_ERROR(The $machine is not supported.)
200 # We have now validated the configuration.
203 # If using ELF, look for an `elf' subdirectory of each machine directory.
204 # We prepend these rather than inserting them whereever the machine appears
205 # because things specified by the machine's ELF ABI should override
206 # OS-specific things, and should always be the same for any OS on the
207 # machine (otherwise what's the point of an ABI?).
208 if test "$elf" = yes; then
211 if test -d $sysdep_dir$m/elf; then
212 elf_dirs="$elf_dirs $m/elf"
215 sysnames="`echo $elf_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
219 # Remove the leading slashes.
220 sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"
223 # Expand the list of system names into a full list of directories
224 # from each element's parent name and Implies file (if present).
226 while test $# -gt 0; do
230 if test -f $sysdep_dir/$name/Implies; then
231 # Collect more names from the `Implies' file (removing comments).
232 implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`"
233 for x in $implied; do
234 test -d $sysdep_dir/$x || echo "Warning: $name implies nonexistent $x">&2
240 # Add NAME to the list of names.
243 # Find the parent of NAME, using the empty string if it has none.
245 parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==p'`"
248 # Add the names implied by NAME, and NAME's parent (if it has one), to
249 # the list of names to be processed (the argument list). We prepend the
250 # implied names to the list and append the parent. We want implied
251 # directories to come before further directories inferred from the
252 # configuration components; this ensures that for sysv4, unix/common
253 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
255 sysnames="`echo $implied $* $parent`"
256 test -n "$sysnames" && set $sysnames
259 # Add the default directories.
260 names="$names generic stub"
262 # Now uniquize the list.
265 for name in $names; do
266 if echo "$seen" | fgrep -x $name >/dev/null; then
267 # Already in the list.
271 if test -z "$seen"; then
272 seen="$name" sysnames="$name"
276 sysnames="$sysnames $name"
280 libc_cv_sysdirs="$sysnames"])
281 AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs"
284 if test "$INSTALL" = "${srcdir}/install-sh"; then
285 # The makefiles need to use a different form to find it in $srcdir.
286 INSTALL='$(..)./install-sh'
289 AC_CHECK_TOOL(CC, gcc)
290 AC_CHECK_TOOL(AR, ar)
291 AC_CHECK_TOOL(RANLIB, ranlib, :)
294 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
295 echo '#include <stddef.h>
296 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
297 if eval "$ac_cpp conftest.c 2>/dev/null" \
298 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
299 libc_cv_signed_size_t=no
301 libc_cv_signed_size_t=yes
304 if test $libc_cv_signed_size_t = yes; then
305 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
306 cat >> confdefs.h <<\EOF
308 #define __SIZE_TYPE__ unsigned
312 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
314 [#define __need_size_t
315 #define __need_wchar_t
318 #include <stddef.h>], [size_t size; wchar_t wchar;
320 #error stddef.h ignored __need_*
322 if (&size == NULL || &wchar == NULL) abort ();],
323 libc_cv_friendly_stddef=yes,
324 libc_cv_friendly_stddef=no)])
325 if test $libc_cv_friendly_stddef = yes; then
326 config_vars="$config_vars
327 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
330 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
331 libc_cv_need_minus_P, [dnl
332 cat > conftest.S <<EOF
333 #include "confdefs.h"
334 /* Nothing whatsoever. */
336 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
337 libc_cv_need_minus_P=no
339 libc_cv_need_minus_P=yes
342 if test $libc_cv_need_minus_P = yes; then
343 config_vars="$config_vars
344 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
347 AC_CACHE_CHECK(for assembler global-symbol directive,
348 libc_cv_asm_global_directive, [dnl
349 libc_cv_asm_global_directive=UNKNOWN
350 for ac_globl in .globl .global; do
351 cat > conftest.s <<EOF
356 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
357 libc_cv_asm_global_directive=${ac_globl}
360 test $libc_cv_asm_global_directive != UNKNOWN && break
362 if test $libc_cv_asm_global_directive = UNKNOWN; then
363 AC_MSG_ERROR(cannot determine asm global directive)
365 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
368 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
369 cat > conftest.s <<EOF
372 .set glibc_conftest_frobozz,foo
373 $libc_cv_asm_global_directive glibc_conftest_frobozz
375 # The alpha-dec-osf1 assembler gives only a warning for `.set'
376 # (but it doesn't work), so we must do a linking check to be sure.
377 cat > conftest1.c <<\EOF
378 extern int glibc_conftest_frobozz;
379 main () { printf ("%d\n", glibc_conftest_frobozz); }
381 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
382 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
383 libc_cv_asm_set_directive=yes
385 libc_cv_asm_set_directive=no
388 if test $libc_cv_asm_set_directive = yes; then
389 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
392 if test $elf != yes; then
393 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
394 [AC_TRY_COMPILE(, [asm (".section .init");
395 asm (".section .fini");],
396 libc_cv_have_initfini=yes,
397 libc_cv_have_initfini=no)])
398 AC_SUBST(libc_cv_have_initfini)dnl
399 if test $libc_cv_have_initfini = yes; then
400 AC_DEFINE(HAVE_INITFINI)
404 # sysdeps configure fragments may set these with files to be linked below.
408 # Iterate over all the sysdep directories we will use, running their
409 # configure fragments, and looking for a uname implementation.
411 for dir in $sysnames; do
412 if test -r $sysdep_dir/$dir/configure; then
413 AC_MSG_RESULT(running configure fragment for $dir)
414 . $sysdep_dir/$dir/configure
416 if test -z "$uname"; then
417 { test -r $sysdep_dir/$dir/uname.c || test -r $sysdep_dir/$dir/uname.S; } \
422 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
424 # If we will use the generic uname implementation, we must figure out what
425 # it will say by examining the system, and write the results in config-name.h.
426 if test "$uname" = generic; then
429 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
431 if test $uname_sysname != $config_os; then
432 config_release=`echo $config_os | sed s/$uname_sysname//`
435 AC_DEFUN(LIBC_KERNEL_ID, [dnl
436 if test -r /vmunix; then
437 kernel_id=`strings /vmunix | grep UNIX`
438 elif test -r /dynix; then
439 kernel_id=`strings /dynix | grep DYNIX`
445 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
446 AC_REQUIRE([LIBC_KERNEL_ID])dnl
448 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
450 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
451 != x$config_release; then
452 # The configuration release is a substring of the kernel release.
453 libc_cv_uname_release=$kernel_release
454 elif test x$config_release != x; then
455 libc_cv_uname_release=$config_release
456 elif test x$kernel_release != x; then
457 libc_cv_uname_release=$kernel_release
459 libc_cv_uname_release=unknown
461 uname_release="$libc_cv_uname_release"
463 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
464 AC_REQUIRE([LIBC_KERNEL_ID])dnl
466 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
468 if test -n "$kernel_version"; then
469 libc_cv_uname_version="$kernel_version"
471 libc_cv_uname_version=unknown
473 uname_version="$libc_cv_uname_version"
475 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
476 config_uname=config-name.h:config-name.in
478 # For non-generic uname, we don't need to create config-name.h at all.
482 AC_MSG_CHECKING(stdio selection)
485 libio) AC_DEFINE(USE_IN_LIBIO) ;;
486 default) stdio=stdio ;;
488 AC_MSG_RESULT($stdio)
490 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(weak)
491 if test $gnu_ld = yes; then
492 AC_DEFINE(HAVE_GNU_LD)
494 if test $gnu_as = yes; then
495 AC_DEFINE(HAVE_GNU_AS)
497 if test $elf = yes; then
500 if test $weak = yes; then
501 AC_DEFINE(HAVE_WEAK_SYMBOLS)
505 if test $shared = default; then
506 if test $gnu_ld = yes; then
513 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
516 config_makefile=Makefile
519 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
520 [echo '$config_vars' >> config.make])