1 Dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.10)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 = $withval" ;;
35 dnl Arguments to specify presence of other packages/features.
37 --with-fp if using floating-point hardware [default=yes],
38 with_fp=$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,
53 AC_ARG_ENABLE(libio, dnl
54 [ --enable-libio build in GNU libio instead of GNU stdio],
55 [if test $enableval = yes; then
62 dnl Arguments to enable or disable building the shared, profiled, and
63 dnl -fomit-frame-pointer libraries.
64 AC_ARG_ENABLE(shared, dnl
65 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
66 shared=$enableval, shared=default)
67 AC_ARG_ENABLE(profile, dnl
68 [ --enable-profile build profiled library [default=yes]],
69 profile=$enableval, profile=yes)
70 AC_ARG_ENABLE(omitfp, dnl
71 [ --enable-omitfp build undebuggable optimized library [default=no]],
72 omitfp=$enableval, omitfp=no)
74 dnl Generic infrastructure for drop-in additions to libc.
75 AC_ARG_ENABLE(add-ons, dnl
76 [ --enable-add-ons=DIR... configure and build named extra directories],
77 [add_ons=`echo "$enableval" | sed 's/,/ /g'`],
79 AC_CONFIG_SUBDIRS($add_ons)
81 if test x"$add_ons" != x; then
83 add_ons_pfx="$add_ons_pfx $f/"
88 # We keep the original values in `$config_*' and never modify them, so we
89 # can write them unchanged into config.make. Everything else uses
90 # $machine, $vendor, and $os, and changes them whenever convenient.
91 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
93 # Some configurations imply other options.
95 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
96 # These systems always use GNU tools.
97 gnu_ld=yes gnu_as=yes ;;
102 gnu* | linux* | sysv4* | solaris2*)
103 # These systems (almost) always use the ELF format.
108 machine=$config_machine
109 vendor=$config_vendor
112 dnl We need to use [ and ] for other purposes for a while now.
114 # Expand the configuration machine name into a subdirectory by architecture
115 # type and particular chip.
117 a29k | am29000) base_machine=a29k machine=a29k ;;
118 alpha*) base_machine=alpha machine=alpha/$machine ;;
119 hppa*) base_machine=hppa machine=hppa/$machine ;;
120 i[3456]86) base_machine=i386 machine=i386/$machine ;;
121 m680?0) base_machine=m68k machine=m68k/$machine ;;
122 m68k) base_machine=m68k machine=m68k/m68020 ;;
123 m88???) base_machine=m88k machine=m88k/$machine ;;
124 m88k) base_machine=m88k machine=m88k/m88100 ;;
125 mips*) base_machine=mips machine=mips/$machine ;;
126 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
127 sparc[6789]) base_machine=sparc machine=sparc/$machine ;;
128 supersparc) base_machine=sparc machine=sparc/sparc8 ;;
131 AC_SUBST(base_machine)
133 # Compute the list of sysdep directories for this configuration.
134 # This can take a while to compute.
135 sysdep_dir=$srcdir/sysdeps
136 AC_MSG_CHECKING(sysdep dirs)
137 dnl We need to use [ and ] for other purposes for a while now.
139 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
140 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
145 netbsd* | 386bsd* | freebsd* | bsdi*)
146 base_os=unix/bsd/bsd4.4 ;;
147 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
149 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
152 base_os=unix/sysv/sysv4 ;;
154 base_os=standalone ;;
159 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
162 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
166 o=`echo $tail | sed 's/[0-9]*$//'`
167 if test $o != $tail; then
171 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
174 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
180 # For sparc/sparc9, try sparc/sparc9 and then sparc.
183 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
185 # Prepend the machine's FPU directory unless --without-fp.
186 if test "$with_fp" = yes; then
193 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
196 # Find what sysdep directories exist.
198 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
199 for d in $add_ons_pfx ''; do
200 for b in $base ''; do
201 for m0 in $mach ''; do
202 for v in /$vendor ''; do
203 for o in /$ostry ''; do
204 for m in $mach ''; do
205 if test "$m0$b$v$o$m"; then
206 try="${d}sysdeps$m0$b$v$o$m"
207 test -n "$enable_debug_configure" &&
208 echo "$0 [DEBUG]: try $try" >&2
211 *) dest=$srcdir/$try ;;
213 if test -d $dest; then
214 sysnames="$sysnames $try"
215 { test -n "$o" || test -n "$b"; } && os_used=t
216 { test -n "$m" || test -n "$m0"; } && machine_used=t
227 if test -z "$os_used" && test "$os" != none; then
228 AC_MSG_ERROR(Operating system $os is not supported.)
230 if test -z "$machine_used" && test "$machine" != none; then
231 AC_MSG_ERROR(The $machine is not supported.)
234 # We have now validated the configuration.
237 # If using ELF, look for an `elf' subdirectory of each machine directory.
238 # We prepend these rather than inserting them whereever the machine appears
239 # because things specified by the machine's ELF ABI should override
240 # OS-specific things, and should always be the same for any OS on the
241 # machine (otherwise what's the point of an ABI?).
242 if test "$elf" = yes; then
244 for d in $add_ons_pfx ''; do
247 *) xsrcdir=$srcdir/ ;;
250 if test -d $xsrcdir${d}sysdeps$m/elf; then
251 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
255 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
259 # Expand the list of system names into a full list of directories
260 # from each element's parent name and Implies file (if present).
263 while test $# -gt 0; do
267 case " $names " in *" $name "*)
268 # Already in the list.
272 # Report each name as we discover it, so there is no long pause in output.
273 echo $ac_n "$name $ac_c" >&AC_FD_MSG
275 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
279 *) xsrcdir=$srcdir/ ;;
281 test -n "$enable_debug_configure" &&
282 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
284 if test -f $xsrcdir$name/Implies; then
285 # Collect more names from the `Implies' file (removing comments).
286 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
288 for x in $implied_candidate; do
289 if test -d $xsrcdir$name_base/$x; then
290 implied="$implied $name_base/$x";
292 AC_MSG_WARN($name/Implies specifies nonexistent $x)
299 # Add NAME to the list of names.
302 # Find the parent of NAME, using the empty string if it has none.
304 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
307 # Add the names implied by NAME, and NAME's parent (if it has one), to
308 # the list of names to be processed (the argument list). We prepend the
309 # implied names to the list and append the parent. We want implied
310 # directories to come before further directories inferred from the
311 # configuration components; this ensures that for sysv4, unix/common
312 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
314 sysnames="`echo $implied $* $parent`"
315 test -n "$sysnames" && set $sysnames
318 # Add the default directories.
319 sysnames="$names sysdeps/generic sysdeps/stub"
321 # The other names were emitted during the scan.
322 AC_MSG_RESULT(sysdeps/generic sysdeps/stub)
328 if test "$INSTALL" = "${srcdir}/install-sh"; then
329 # The makefiles need to use a different form to find it in $srcdir.
330 INSTALL='$(..)./install-sh'
333 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
335 AC_CHECK_TOOL(CC, gcc)
336 if test $host != $build; then
337 AC_CHECK_PROG(BUILD_CC, gcc cc)
340 AC_CHECK_TOOL(AR, ar)
341 AC_CHECK_TOOL(RANLIB, ranlib, :)
343 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
344 echo '#include <stddef.h>
345 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
346 if eval "$ac_cpp conftest.c 2>/dev/null" \
347 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
348 libc_cv_signed_size_t=no
350 libc_cv_signed_size_t=yes
353 if test $libc_cv_signed_size_t = yes; then
354 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
355 cat >> confdefs.h <<\EOF
357 #define __SIZE_TYPE__ unsigned
361 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
363 [#define __need_size_t
364 #define __need_wchar_t
367 #include <stddef.h>], [size_t size; wchar_t wchar;
369 #error stddef.h ignored __need_*
371 if (&size == NULL || &wchar == NULL) abort ();],
372 libc_cv_friendly_stddef=yes,
373 libc_cv_friendly_stddef=no)])
374 if test $libc_cv_friendly_stddef = yes; then
375 config_vars="$config_vars
376 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
379 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
380 libc_cv_need_minus_P, [dnl
381 cat > conftest.S <<EOF
382 #include "confdefs.h"
383 /* Nothing whatsoever. */
385 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
386 libc_cv_need_minus_P=no
388 libc_cv_need_minus_P=yes
391 if test $libc_cv_need_minus_P = yes; then
392 config_vars="$config_vars
393 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
396 AC_CACHE_CHECK(for assembler global-symbol directive,
397 libc_cv_asm_global_directive, [dnl
398 libc_cv_asm_global_directive=UNKNOWN
399 for ac_globl in .globl .global; do
400 cat > conftest.s <<EOF
405 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
406 libc_cv_asm_global_directive=${ac_globl}
409 test $libc_cv_asm_global_directive != UNKNOWN && break
411 if test $libc_cv_asm_global_directive = UNKNOWN; then
412 AC_MSG_ERROR(cannot determine asm global directive)
414 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
417 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
418 cat > conftest.s <<EOF
421 .set glibc_conftest_frobozz,foo
422 $libc_cv_asm_global_directive glibc_conftest_frobozz
424 # The alpha-dec-osf1 assembler gives only a warning for `.set'
425 # (but it doesn't work), so we must do a linking check to be sure.
426 cat > conftest1.c <<\EOF
427 extern int glibc_conftest_frobozz;
428 main () { printf ("%d\n", glibc_conftest_frobozz); }
430 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
431 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
432 libc_cv_asm_set_directive=yes
434 libc_cv_asm_set_directive=no
437 if test $libc_cv_asm_set_directive = yes; then
438 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
441 if test $elf != yes; then
442 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
443 [AC_TRY_COMPILE(, [asm (".section .init");
444 asm (".section .fini");
446 libc_cv_have_initfini=yes,
447 libc_cv_have_initfini=no)])
448 AC_SUBST(libc_cv_have_initfini)dnl
449 if test $libc_cv_have_initfini = yes; then
450 AC_DEFINE(HAVE_INITFINI)
454 if test $elf = yes; then
455 libc_cv_asm_underscores=no
457 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
458 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
459 libc_cv_asm_underscores=yes,
460 libc_cv_asm_underscores=no)])
462 if test $libc_cv_asm_underscores = no; then
463 AC_DEFINE(NO_UNDERSCORES)
466 if test $elf = yes; then
467 libc_cv_weak_symbols=yes
468 libc_cv_asm_weak_directive=yes
469 libc_cv_asm_weakext_directive=no
471 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
473 cat > conftest.s <<EOF
475 ${libc_cv_asm_global_directive} foo
480 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
481 libc_cv_asm_weak_directive=yes
483 libc_cv_asm_weak_directive=no
487 if test $libc_cv_asm_weak_directive = no; then
488 AC_CACHE_CHECK(for assembler .weakext directive,
489 libc_cv_asm_weakext_directive,
491 cat > conftest.s <<EOF
493 ${libc_cv_asm_global_directive} foo
498 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
499 libc_cv_asm_weakext_directive=yes
501 libc_cv_asm_weakext_directive=no
508 if test $libc_cv_asm_weak_directive = yes; then
509 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
510 elif test $libc_cv_asm_weakext_directive = yes; then
511 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
514 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
515 cat > conftest.c <<\EOF
520 dnl No \ in command here because it ends up inside ''.
521 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
522 -nostdlib -nostartfiles -Wl,--no-whole-archive
523 -o conftest conftest.c]); then
524 libc_cv_ld_no_whole_archive=yes
526 libc_cv_ld_no_whole_archive=no
529 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
531 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
532 cat > conftest.c <<\EOF
537 dnl No \ in command here because it ends up inside ''.
538 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
539 -nostdlib -nostartfiles -fno-exceptions
540 -o conftest conftest.c]); then
541 libc_cv_gcc_no_exceptions=yes
543 libc_cv_gcc_no_exceptions=no
546 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
548 ### End of automated tests.
549 ### Now run sysdeps configure fragments.
551 # sysdeps configure fragments may set these with files to be linked below.
555 # Iterate over all the sysdep directories we will use, running their
556 # configure fragments, and looking for a uname implementation.
558 for dir in $sysnames; do
561 *) dest=$srcdir/$dir ;;
563 if test -r $dest/configure; then
564 AC_MSG_RESULT(running configure fragment for $dest)
568 if test -z "$uname"; then
569 if test -r $sysdep_dir/$dir/uname.c ||
570 test -r $sysdep_dir/$dir/uname.S ||
571 { test -r $sysdep_dir/$dir/syscalls.list &&
572 grep '^uname[ ]' $sysdep_dir/$dir/syscalls.list >/dev/null; }; then
579 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
581 # If we will use the generic uname implementation, we must figure out what
582 # it will say by examining the system, and write the results in config-name.h.
583 if test "$uname" = generic; then
586 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
588 if test $uname_sysname != $config_os; then
589 config_release=`echo $config_os | sed s/$uname_sysname//`
592 AC_DEFUN(LIBC_KERNEL_ID, [dnl
593 if test -r /vmunix; then
594 kernel_id=`strings /vmunix | grep UNIX`
595 elif test -r /dynix; then
596 kernel_id=`strings /dynix | grep DYNIX`
602 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
603 AC_REQUIRE([LIBC_KERNEL_ID])dnl
605 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
607 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
608 != x$config_release; then
609 # The configuration release is a substring of the kernel release.
610 libc_cv_uname_release=$kernel_release
611 elif test x$config_release != x; then
612 libc_cv_uname_release=$config_release
613 elif test x$kernel_release != x; then
614 libc_cv_uname_release=$kernel_release
616 libc_cv_uname_release=unknown
618 uname_release="$libc_cv_uname_release"
620 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
621 AC_REQUIRE([LIBC_KERNEL_ID])dnl
623 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
625 if test -n "$kernel_version"; then
626 libc_cv_uname_version="$kernel_version"
628 libc_cv_uname_version=unknown
630 uname_version="$libc_cv_uname_version"
632 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
633 config_uname=config-name.h:config-name.in
635 # For non-generic uname, we don't need to create config-name.h at all.
639 AC_MSG_CHECKING(stdio selection)
642 libio) AC_DEFINE(USE_IN_LIBIO) ;;
643 default) stdio=stdio ;;
645 AC_MSG_RESULT($stdio)
647 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
648 if test $gnu_ld = yes; then
649 AC_DEFINE(HAVE_GNU_LD)
651 if test $gnu_as = yes; then
652 AC_DEFINE(HAVE_GNU_AS)
654 if test $elf = yes; then
659 if test $shared = default; then
660 if test $gnu_ld = yes; then
669 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
672 config_makefile=Makefile
675 AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
676 [echo '$config_vars' >> config.make])