1 Dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.10.2)dnl dnl Minimum Autoconf version required.
5 AC_CONFIG_HEADER(config.h)
7 # This will get text that should go into config.make.
10 # We need a variable with the absolute path to the toplevel build directory.
11 top_absdir=`cd $srcdir; pwd`
14 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
16 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
19 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
21 *) config_vars="$config_vars
22 gmp-srcdir = $withval" ;;
25 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
26 AC_ARG_WITH(gettext, dnl
27 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
29 case "$with_gettext" in
31 AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
34 config_vars="$config_vars
35 gettext-srcdir = $withval" ;;
39 dnl Arguments to specify presence of other packages/features.
41 --with-fp if using floating-point hardware [default=yes],
42 with_fp=$withval, with_fp=yes)
43 AC_ARG_WITH(gnu-binutils, dnl
44 --with-gnu-binutils if using GNU binutils (as and ld),
45 gnu_binutils=$withval, gnu_binutils=no)
46 AC_ARG_WITH(gnu-ld, dnl
47 --with-gnu-ld if using GNU ld (in the binutils package),
48 gnu_ld=$withval, gnu_ld=no)
49 AC_ARG_WITH(gnu-as, dnl
50 --with-gnu-as if using GNU as (in the binutils package),
51 gnu_as=$withval, gnu_as=no)
52 test $gnu_binutils = yes && gnu_as=yes gnu_ld=yes
54 --with-elf if using the ELF object format,
57 AC_ARG_ENABLE(libio, dnl
58 [ --enable-libio build in GNU libio instead of GNU stdio],
59 [if test $enableval = yes; then
66 dnl Arguments to enable or disable building the shared, profiled, and
67 dnl -fomit-frame-pointer libraries.
68 AC_ARG_ENABLE(shared, dnl
69 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
70 shared=$enableval, shared=default)
71 AC_ARG_ENABLE(profile, dnl
72 [ --enable-profile build profiled library [default=yes]],
73 profile=$enableval, profile=yes)
74 AC_ARG_ENABLE(omitfp, dnl
75 [ --enable-omitfp build undebuggable optimized library [default=no]],
76 omitfp=$enableval, omitfp=no)
78 dnl Generic infrastructure for drop-in additions to libc.
79 AC_ARG_ENABLE(add-ons, dnl
80 [ --enable-add-ons=DIR... configure and build named extra directories],
81 [add_ons=`echo "$enableval" | sed 's/,/ /g'`],
83 AC_CONFIG_SUBDIRS($add_ons)
85 if test x"$add_ons" != x; then
87 add_ons_pfx="$add_ons_pfx $f/"
92 # We keep the original values in `$config_*' and never modify them, so we
93 # can write them unchanged into config.make. Everything else uses
94 # $machine, $vendor, and $os, and changes them whenever convenient.
95 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
97 # Some configurations imply other options.
99 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
100 # These systems always use GNU tools.
101 gnu_ld=yes gnu_as=yes ;;
106 gnu* | linux* | sysv4* | solaris2*)
107 # These systems (almost) always use the ELF format.
112 machine=$config_machine
113 vendor=$config_vendor
116 dnl We need to use [ and ] for other purposes for a while now.
118 # Expand the configuration machine name into a subdirectory by architecture
119 # type and particular chip.
121 a29k | am29000) base_machine=a29k machine=a29k ;;
122 alpha*) base_machine=alpha machine=alpha/$machine ;;
123 hppa*) base_machine=hppa machine=hppa/$machine ;;
124 i[3456]86) base_machine=i386 machine=i386/$machine ;;
125 m680?0) base_machine=m68k machine=m68k/$machine ;;
126 m68k) base_machine=m68k machine=m68k/m68020 ;;
127 m88???) base_machine=m88k machine=m88k/$machine ;;
128 m88k) base_machine=m88k machine=m88k/m88100 ;;
129 mips*) base_machine=mips machine=mips/$machine ;;
130 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
131 sparc[6789]) base_machine=sparc machine=sparc/$machine ;;
132 supersparc) base_machine=sparc machine=sparc/sparc8 ;;
135 AC_SUBST(base_machine)
137 # Compute the list of sysdep directories for this configuration.
138 # This can take a while to compute.
139 sysdep_dir=$srcdir/sysdeps
140 AC_MSG_CHECKING(sysdep dirs)
141 dnl We need to use [ and ] for other purposes for a while now.
143 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
144 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
149 netbsd* | 386bsd* | freebsd* | bsdi*)
150 base_os=unix/bsd/bsd4.4 ;;
151 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
153 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
156 base_os=unix/sysv/sysv4 ;;
158 base_os=standalone ;;
163 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
166 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
170 o=`echo $tail | sed 's/[0-9]*$//'`
171 if test $o != $tail; then
174 # For linux-gnu, try linux-gnu, then linux.
175 o=`echo $tail | sed 's/-.*$//'`
176 if test $o != $tail; then
180 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
183 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
189 # For sparc/sparc9, try sparc/sparc9 and then sparc.
192 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
194 # Prepend the machine's FPU directory unless --without-fp.
195 if test "$with_fp" = yes; then
202 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
205 # Find what sysdep directories exist.
207 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
208 for d in $add_ons_pfx ''; do
209 for b in $base ''; do
210 for m0 in $mach ''; do
211 for v in /$vendor ''; do
212 for o in /$ostry ''; do
213 for m in $mach ''; do
214 if test "$m0$b$v$o$m"; then
215 try="${d}sysdeps$m0$b$v$o$m"
216 test -n "$enable_debug_configure" &&
217 echo "$0 [DEBUG]: try $try" >&2
220 *) dest=$srcdir/$try ;;
222 if test -d $dest; then
223 sysnames="$sysnames $try"
224 { test -n "$o" || test -n "$b"; } && os_used=t
225 { test -n "$m" || test -n "$m0"; } && machine_used=t
236 if test -z "$os_used" && test "$os" != none; then
237 AC_MSG_ERROR(Operating system $os is not supported.)
239 if test -z "$machine_used" && test "$machine" != none; then
240 AC_MSG_ERROR(The $machine is not supported.)
243 # We have now validated the configuration.
246 # If using ELF, look for an `elf' subdirectory of each machine directory.
247 # We prepend these rather than inserting them whereever the machine appears
248 # because things specified by the machine's ELF ABI should override
249 # OS-specific things, and should always be the same for any OS on the
250 # machine (otherwise what's the point of an ABI?).
251 if test "$elf" = yes; then
253 for d in $add_ons_pfx ''; do
256 *) xsrcdir=$srcdir/ ;;
259 if test -d $xsrcdir${d}sysdeps$m/elf; then
260 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
264 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
268 # Expand the list of system names into a full list of directories
269 # from each element's parent name and Implies file (if present).
272 while test $# -gt 0; do
276 case " $names " in *" $name "*)
277 # Already in the list.
281 # Report each name as we discover it, so there is no long pause in output.
282 echo $ac_n "$name $ac_c" >&AC_FD_MSG
284 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
288 *) xsrcdir=$srcdir/ ;;
290 test -n "$enable_debug_configure" &&
291 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
293 if test -f $xsrcdir$name/Implies; then
294 # Collect more names from the `Implies' file (removing comments).
295 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
297 for x in $implied_candidate; do
298 if test -d $xsrcdir$name_base/$x; then
299 implied="$implied $name_base/$x";
301 AC_MSG_WARN($name/Implies specifies nonexistent $x)
308 # Add NAME to the list of names.
311 # Find the parent of NAME, using the empty string if it has none.
313 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
316 # Add the names implied by NAME, and NAME's parent (if it has one), to
317 # the list of names to be processed (the argument list). We prepend the
318 # implied names to the list and append the parent. We want implied
319 # directories to come before further directories inferred from the
320 # configuration components; this ensures that for sysv4, unix/common
321 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
323 sysnames="`echo $implied $* $parent`"
324 test -n "$sysnames" && set $sysnames
327 # Add the default directories.
328 sysnames="$names sysdeps/generic sysdeps/stub"
330 # The other names were emitted during the scan.
331 AC_MSG_RESULT(sysdeps/generic sysdeps/stub)
337 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
338 # The makefiles need to use a different form to find it in $srcdir.
339 INSTALL="$top_absdir/install-sh -c"
342 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
344 AC_CHECK_TOOL(CC, gcc)
345 if test $host != $build; then
346 AC_CHECK_PROG(BUILD_CC, gcc cc)
349 AC_CHECK_TOOL(AR, ar)
350 AC_CHECK_TOOL(RANLIB, ranlib, :)
352 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
353 echo '#include <stddef.h>
354 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
355 if eval "$ac_cpp conftest.c 2>/dev/null" \
356 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
357 libc_cv_signed_size_t=no
359 libc_cv_signed_size_t=yes
362 if test $libc_cv_signed_size_t = yes; then
363 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
364 cat >> confdefs.h <<\EOF
366 #define __SIZE_TYPE__ unsigned
370 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
372 [#define __need_size_t
373 #define __need_wchar_t
376 #include <stddef.h>], [size_t size; wchar_t wchar;
378 #error stddef.h ignored __need_*
380 if (&size == NULL || &wchar == NULL) abort ();],
381 libc_cv_friendly_stddef=yes,
382 libc_cv_friendly_stddef=no)])
383 if test $libc_cv_friendly_stddef = yes; then
384 config_vars="$config_vars
385 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
388 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
389 libc_cv_need_minus_P, [dnl
390 cat > conftest.S <<EOF
391 #include "confdefs.h"
392 /* Nothing whatsoever. */
394 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
395 libc_cv_need_minus_P=no
397 libc_cv_need_minus_P=yes
400 if test $libc_cv_need_minus_P = yes; then
401 config_vars="$config_vars
402 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
405 AC_CACHE_CHECK(for assembler global-symbol directive,
406 libc_cv_asm_global_directive, [dnl
407 libc_cv_asm_global_directive=UNKNOWN
408 for ac_globl in .globl .global; do
409 cat > conftest.s <<EOF
414 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
415 libc_cv_asm_global_directive=${ac_globl}
418 test $libc_cv_asm_global_directive != UNKNOWN && break
420 if test $libc_cv_asm_global_directive = UNKNOWN; then
421 AC_MSG_ERROR(cannot determine asm global directive)
423 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
426 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
427 cat > conftest.s <<EOF
430 .set glibc_conftest_frobozz,foo
431 $libc_cv_asm_global_directive glibc_conftest_frobozz
433 # The alpha-dec-osf1 assembler gives only a warning for `.set'
434 # (but it doesn't work), so we must do a linking check to be sure.
435 cat > conftest1.c <<\EOF
436 extern int glibc_conftest_frobozz;
437 main () { printf ("%d\n", glibc_conftest_frobozz); }
439 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
440 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
441 libc_cv_asm_set_directive=yes
443 libc_cv_asm_set_directive=no
446 if test $libc_cv_asm_set_directive = yes; then
447 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
450 if test $elf != yes; then
451 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
452 [AC_TRY_COMPILE(, [asm (".section .init");
453 asm (".section .fini");
455 libc_cv_have_initfini=yes,
456 libc_cv_have_initfini=no)])
457 AC_SUBST(libc_cv_have_initfini)dnl
458 if test $libc_cv_have_initfini = yes; then
459 AC_DEFINE(HAVE_INITFINI)
463 if test $elf = yes; then
464 libc_cv_asm_underscores=no
466 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
467 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
468 libc_cv_asm_underscores=yes,
469 libc_cv_asm_underscores=no)])
471 if test $libc_cv_asm_underscores = no; then
472 AC_DEFINE(NO_UNDERSCORES)
475 if test $elf = yes; then
476 libc_cv_weak_symbols=yes
477 libc_cv_asm_weak_directive=yes
478 libc_cv_asm_weakext_directive=no
480 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
482 cat > conftest.s <<EOF
484 ${libc_cv_asm_global_directive} foo
489 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
490 libc_cv_asm_weak_directive=yes
492 libc_cv_asm_weak_directive=no
496 if test $libc_cv_asm_weak_directive = no; then
497 AC_CACHE_CHECK(for assembler .weakext directive,
498 libc_cv_asm_weakext_directive,
500 cat > conftest.s <<EOF
502 ${libc_cv_asm_global_directive} foo
507 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
508 libc_cv_asm_weakext_directive=yes
510 libc_cv_asm_weakext_directive=no
517 if test $libc_cv_asm_weak_directive = yes; then
518 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
519 elif test $libc_cv_asm_weakext_directive = yes; then
520 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
523 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
524 cat > conftest.c <<\EOF
529 dnl No \ in command here because it ends up inside ''.
530 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
531 -nostdlib -nostartfiles -Wl,--no-whole-archive
532 -o conftest conftest.c]); then
533 libc_cv_ld_no_whole_archive=yes
535 libc_cv_ld_no_whole_archive=no
538 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
540 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
541 cat > conftest.c <<\EOF
546 dnl No \ in command here because it ends up inside ''.
547 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
548 -nostdlib -nostartfiles -fno-exceptions
549 -o conftest conftest.c]); then
550 libc_cv_gcc_no_exceptions=yes
552 libc_cv_gcc_no_exceptions=no
555 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
557 ### End of automated tests.
558 ### Now run sysdeps configure fragments.
560 # sysdeps configure fragments may set these with files to be linked below.
564 # Iterate over all the sysdep directories we will use, running their
565 # configure fragments, and looking for a uname implementation.
567 for dir in $sysnames; do
570 *) dest=$srcdir/$dir ;;
572 if test -r $dest/configure; then
573 AC_MSG_RESULT(running configure fragment for $dest)
577 if test -z "$uname"; then
578 if test -r $sysdep_dir/$dir/uname.c ||
579 test -r $sysdep_dir/$dir/uname.S ||
580 { test -r $sysdep_dir/$dir/syscalls.list &&
581 grep '^uname[ ]' $sysdep_dir/$dir/syscalls.list >/dev/null; }; then
588 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
590 # If we will use the generic uname implementation, we must figure out what
591 # it will say by examining the system, and write the results in config-name.h.
592 if test "$uname" = generic; then
595 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
597 if test $uname_sysname != $config_os; then
598 config_release=`echo $config_os | sed s/$uname_sysname//`
601 AC_DEFUN(LIBC_KERNEL_ID, [dnl
602 if test -r /vmunix; then
603 kernel_id=`strings /vmunix | grep UNIX`
604 elif test -r /dynix; then
605 kernel_id=`strings /dynix | grep DYNIX`
611 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
612 AC_REQUIRE([LIBC_KERNEL_ID])dnl
614 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
616 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
617 != x$config_release; then
618 # The configuration release is a substring of the kernel release.
619 libc_cv_uname_release=$kernel_release
620 elif test x$config_release != x; then
621 libc_cv_uname_release=$config_release
622 elif test x$kernel_release != x; then
623 libc_cv_uname_release=$kernel_release
625 libc_cv_uname_release=unknown
627 uname_release="$libc_cv_uname_release"
629 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
630 AC_REQUIRE([LIBC_KERNEL_ID])dnl
632 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
634 if test -n "$kernel_version"; then
635 libc_cv_uname_version="$kernel_version"
637 libc_cv_uname_version=unknown
639 uname_version="$libc_cv_uname_version"
641 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
642 config_uname=config-name.h:config-name.in
644 # For non-generic uname, we don't need to create config-name.h at all.
648 AC_MSG_CHECKING(stdio selection)
651 libio) AC_DEFINE(USE_IN_LIBIO) ;;
652 default) stdio=stdio ;;
654 AC_MSG_RESULT($stdio)
656 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
657 if test $gnu_ld = yes; then
658 AC_DEFINE(HAVE_GNU_LD)
660 if test $gnu_as = yes; then
661 AC_DEFINE(HAVE_GNU_AS)
663 if test $elf = yes; then
668 if test $shared = default; then
669 if test $gnu_ld = yes; then
678 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
681 config_makefile=Makefile
684 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
685 [echo '$config_vars' >> config.make])