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 AC_ARG_ENABLE(libio, dnl
44 [ --enable-libio build in GNU libio instead of GNU stdio],
45 stdio=libio, stdio=stdio)
47 dnl Arguments to enable or disable building the shared, profiled, and
48 dnl -fomit-frame-pointer libraries.
49 AC_ARG_ENABLE(shared, dnl
50 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
51 shared=$enableval, shared=default)
52 AC_ARG_ENABLE(profile, dnl
53 [ --enable-profile build profiled library [default=yes]],
54 profile=$enableval, profile=yes)
55 AC_ARG_ENABLE(omitfp, dnl
56 [ --enable-omitfp build undebuggable optimized library [default=no]],
57 omitfp=$enableval, omitfp=no)
59 AC_MSG_CHECKING(stdio selection)
61 if test $stdio = libio; then
62 AC_DEFINE(USE_IN_LIBIO)
67 # We keep the original values in `$config_*' and never modify them, so we
68 # can write them unchanged into config.make. Everything else uses
69 # $machine, $vendor, and $os, and changes them whenever convenient.
70 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
72 # Some configurations imply other options.
74 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
75 # These systems always use GNU tools.
79 gnu* | linux* | sysv4* | solaris2*)
80 # These systems always use the ELF format.
84 # Compute the list of sysdep directories for this configuration.
85 sysdep_dir=$srcdir/sysdeps
86 AC_CACHE_CHECK(sysdep dirs, libc_cv_sysdirs, [dnl
87 machine=$config_machine
91 dnl We need to use [ and ] for other purposes for a while now.
93 # Expand the configuration machine name into a subdirectory by architecture
94 # type and particular chip.
96 a29k | am29000) machine=a29k ;;
97 alpha*) machine=alpha/$machine ;;
98 hppa*) machine=hppa/$machine ;;
99 i[345]86) machine=i386/$machine ;;
100 m680?0) machine=m68k/$machine ;;
101 m68k) machine=m68k/m68020 ;;
102 m88???) machine=m88k/$machine ;;
103 m88k) machine=m88k/m88100 ;;
104 mips*) machine=mips/$machine ;;
105 mips64*) machine=mips/mips64/$machine ;;
106 sparc[6789]) machine=sparc/$machine ;;
107 supersparc) machine=sparc/sparc8 ;;
110 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
111 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
116 netbsd* | 386bsd* | freebsd* | bsdi*)
117 base_os=unix/bsd/bsd4.4 ;;
118 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
120 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
123 base_os=unix/sysv/sysv4 ;;
125 base_os=standalone ;;
130 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
133 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
137 o=`echo $tail | sed 's/[0-9]*$//'`
138 if test $o != $tail; then
142 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
145 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
151 # For sparc/sparc9, try sparc/sparc9 and then sparc.
154 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
156 # Prepend the machine's FPU directory unless --without-fp.
157 if test "$with_fp" = yes; then
164 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
167 # Find what sysdep directories exist.
169 for b in $base ''; do
170 for m0 in $mach ''; do
171 for v in /$vendor ''; do
172 for o in /$ostry ''; do
173 for m in $mach ''; do
175 test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2
176 if test -d $sysdep_dir$try; then
177 sysnames="$sysnames $try"
178 { test -n "$o" || test -n "$b"; } && os_used=t
179 { test -n "$m" || test -n "$m0"; } && machine_used=t
187 if test -z "$os_used" && test "$os" != none; then
188 AC_MSG_ERROR(Operating system $os is not supported.)
190 if test -z "$machine_used" && test "$machine" != none; then
191 AC_MSG_ERROR(The $machine is not supported.)
194 # We have now validated the configuration.
197 # If using ELF, look for an `elf' subdirectory of each machine directory.
198 # We prepend these rather than inserting them whereever the machine appears
199 # because things specified by the machine's ELF ABI should override
200 # OS-specific things, and should always be the same for any OS on the
201 # machine (otherwise what's the point of an ABI?).
202 if test "$elf" = yes; then
205 if test -d $sysdep_dir$m/elf; then
206 elf_dirs="$elf_dirs $m/elf"
209 sysnames="`echo $elf_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
213 # Remove the leading slashes.
214 sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"
217 # Expand the list of system names into a full list of directories
218 # from each element's parent name and Implies file (if present).
220 while test $# -gt 0; do
224 if test -f $sysdep_dir/$name/Implies; then
225 # Collect more names from the `Implies' file (removing comments).
226 implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`"
227 for x in $implied; do
228 test -d $sysdep_dir/$x || echo "Warning: $name implies nonexistent $x">&2
234 # Add NAME to the list of names.
237 # Find the parent of NAME, using the empty string if it has none.
239 parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==p'`"
242 # Add the names implied by NAME, and NAME's parent (if it has one), to
243 # the list of names to be processed (the argument list). We prepend the
244 # implied names to the list and append the parent. We want implied
245 # directories to come before further directories inferred from the
246 # configuration components; this ensures that for sysv4, unix/common
247 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
249 sysnames="`echo $implied $* $parent`"
250 test -n "$sysnames" && set $sysnames
253 # Add the default directories.
254 names="$names generic stub"
256 # Now uniquize the list.
259 for name in $names; do
260 if echo "$seen" | fgrep -x $name >/dev/null; then
261 # Already in the list.
265 if test -z "$seen"; then
266 seen="$name" sysnames="$name"
270 sysnames="$sysnames $name"
274 libc_cv_sysdirs="$sysnames"])
275 AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs"
278 if test "$INSTALL" = "${srcdir}/install-sh"; then
279 # The makefiles need to use a different form to find it in $srcdir.
280 INSTALL='$(..)./install-sh'
283 AC_CHECK_TOOL(CC, gcc)
284 AC_CHECK_TOOL(AR, ar)
285 AC_CHECK_TOOL(RANLIB, ranlib, :)
288 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
289 echo '#include <stddef.h>
290 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
291 if eval "$ac_cpp conftest.c 2>/dev/null" \
292 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
293 libc_cv_signed_size_t=no
295 libc_cv_signed_size_t=yes
298 if test $libc_cv_signed_size_t = yes; then
299 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
300 cat >> confdefs.h <<\EOF
302 #define __SIZE_TYPE__ unsigned
306 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
308 [#define __need_size_t
309 #define __need_wchar_t
312 #include <stddef.h>], [size_t size; wchar_t wchar;
314 #error stddef.h ignored __need_*
316 if (&size == NULL || &wchar == NULL) abort ();],
317 libc_cv_friendly_stddef=yes,
318 libc_cv_friendly_stddef=no)])
319 if test $libc_cv_friendly_stddef = yes; then
320 config_vars="$config_vars
321 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
324 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
325 libc_cv_need_minus_P, [dnl
326 cat > conftest.S <<EOF
327 #include "confdefs.h"
328 /* Nothing whatsoever. */
330 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
331 libc_cv_need_minus_P=no
333 libc_cv_need_minus_P=yes
336 if test $libc_cv_need_minus_P = yes; then
337 config_vars="$config_vars
338 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
341 AC_CACHE_CHECK(for assembler global-symbol directive,
342 libc_cv_asm_global_directive, [dnl
343 libc_cv_asm_global_directive=UNKNOWN
344 for ac_globl in .globl .global; do
345 cat > conftest.s <<EOF
350 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
351 libc_cv_asm_global_directive=${ac_globl}
354 test $libc_cv_asm_global_directive != UNKNOWN && break
356 if test $libc_cv_asm_global_directive = UNKNOWN; then
357 AC_MSG_ERROR(cannot determine asm global directive)
359 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
362 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
363 cat > conftest.s <<EOF
366 .set glibc_conftest_frobozz,foo
367 $libc_cv_asm_global_directive glibc_conftest_frobozz
369 # The alpha-dec-osf1 assembler gives only a warning for `.set'
370 # (but it doesn't work), so we must do a linking check to be sure.
371 cat > conftest1.c <<\EOF
372 extern int glibc_conftest_frobozz;
373 main () { printf ("%d\n", glibc_conftest_frobozz); }
375 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
376 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
377 libc_cv_asm_set_directive=yes
379 libc_cv_asm_set_directive=no
382 if test $libc_cv_asm_set_directive = yes; then
383 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
386 if test $elf != yes; then
387 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
388 [AC_TRY_COMPILE(, [asm (".section .init");
389 asm (".section .fini");],
390 libc_cv_have_initfini=yes,
391 libc_cv_have_initfini=no)])
392 AC_SUBST(libc_cv_have_initfini)dnl
393 if test $libc_cv_have_initfini = yes; then
394 AC_DEFINE(HAVE_INITFINI)
398 # sysdeps configure fragments may set these with files to be linked below.
402 # Iterate over all the sysdep directories we will use, running their
403 # configure fragments, and looking for a uname implementation.
405 for dir in $sysnames; do
406 if test -r $sysdep_dir/$dir/configure; then
407 AC_MSG_RESULT(running configure fragment for $dir)
408 . $sysdep_dir/$dir/configure
410 if test -z "$uname"; then
411 { test -r $sysdep_dir/$dir/uname.c || test -r $sysdep_dir/$dir/uname.S; } \
416 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
418 # If we will use the generic uname implementation, we must figure out what
419 # it will say by examining the system, and write the results in config-name.h.
420 if test "$uname" = generic; then
423 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
425 if test $uname_sysname != $config_os; then
426 config_release=`echo $config_os | sed s/$uname_sysname//`
429 AC_DEFUN(LIBC_KERNEL_ID, [dnl
430 if test -r /vmunix; then
431 kernel_id=`strings /vmunix | grep UNIX`
432 elif test -r /dynix; then
433 kernel_id=`strings /dynix | grep DYNIX`
439 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
440 AC_REQUIRE([LIBC_KERNEL_ID])dnl
442 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
444 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
445 != x$config_release; then
446 # The configuration release is a substring of the kernel release.
447 libc_cv_uname_release=$kernel_release
448 elif test x$config_release != x; then
449 libc_cv_uname_release=$config_release
450 elif test x$kernel_release != x; then
451 libc_cv_uname_release=$kernel_release
453 libc_cv_uname_release=unknown
455 uname_release="$libc_cv_uname_release"
457 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
458 AC_REQUIRE([LIBC_KERNEL_ID])dnl
460 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
462 if test -n "$kernel_version"; then
463 libc_cv_uname_version="$kernel_version"
465 libc_cv_uname_version=unknown
467 uname_version="$libc_cv_uname_version"
469 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
470 config_uname=config-name.h:config-name.in
472 # For non-generic uname, we don't need to create config-name.h at all.
476 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(weak)
477 if test $gnu_ld = yes; then
478 AC_DEFINE(HAVE_GNU_LD)
480 if test $gnu_as = yes; then
481 AC_DEFINE(HAVE_GNU_AS)
483 if test $elf = yes; then
486 if test $weak = yes; then
487 AC_DEFINE(HAVE_WEAK_SYMBOLS)
491 if test $shared = default; then
492 if test $gnu_ld = yes; then
499 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
502 config_makefile=Makefile
505 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
506 [echo '$config_vars' >> config.make])