| blob | 683f6b6a39d21671dd4f0bdced385d446d1ae050 |
1 dnl Process this file with autoconf to produce a configure script.
2 AC_REVISION([$CVSid$])
3 AC_PREREQ(2.11)dnl dnl Minimum Autoconf version required.
4 AC_INIT(include/features.h)
5 AC_CONFIG_HEADER(config.h)
6 AC_CONFIG_AUX_DIR(scripts)
8 # This will get text that should go into config.make.
9 config_vars=
11 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
12 AC_ARG_WITH(gmp, dnl
13 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
14 [dnl
15 case "$with_gmp" in
16 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
17 ''|no) ;;
18 *) config_vars="$config_vars
19 gmp-srcdir = $withval" ;;
20 esac
21 ])
22 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
23 AC_ARG_WITH(gettext, dnl
24 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
25 [dnl
26 case "$with_gettext" in
27 yes)
28 AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
29 ''|no) ;;
30 *)
31 config_vars="$config_vars
32 gettext-srcdir = $withval" ;;
33 esac
34 ])
36 dnl Arguments to specify presence of other packages/features.
37 AC_ARG_WITH(fp, dnl
38 [ --with-fp if using floating-point hardware [default=yes]],
39 with_fp=$withval, with_fp=yes)
40 AC_ARG_WITH(binutils, dnl
41 --with-binutils=PATH specify location of binutils (as and ld),
42 path_binutils=$withval, path_binutils='')
43 AC_ARG_WITH(elf, dnl
44 --with-elf if using the ELF object format,
45 elf=$withval, elf=no)
46 AC_ARG_WITH(cvs, dnl
47 [ --without-cvs if CVS should not be used],
48 with_cvs=$withval, with_cvs=yes)
49 AC_SUBST(with_cvs)
51 AC_ARG_WITH(headers, dnl
52 [ --with-headers=PATH location of system headers to use
53 [e.g. /usr/src/linux/include]
54 [default=compiler default]],
55 sysheaders=$withval, sysheaders='')
57 AC_ARG_ENABLE(libio, dnl
58 [ --enable-libio build in GNU libio instead of GNU stdio],
59 [if test $enableval = yes; then
60 stdio=libio
61 else
62 stdio=stdio
63 fi],
64 stdio=default)
66 AC_ARG_ENABLE(sanity-checks, dnl
67 [ --disable-sanity-checks really do not use threads (should not be used
68 except in special situations) [default=yes]],
69 enable_sanity=$enableval, enable_sanity=yes)
71 dnl Arguments to enable or disable building the static, shared, profiled,
72 dnl and -fomit-frame-pointer libraries.
73 AC_ARG_ENABLE(static, dnl
74 [ --enable-static build static library [default=yes]],
75 static=$enableval, static=yes)
76 AC_ARG_ENABLE(shared, dnl
77 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
78 shared=$enableval, shared=default)
79 AC_ARG_ENABLE(profile, dnl
80 [ --enable-profile build profiled library [default=yes]],
81 profile=$enableval, profile=yes)
82 AC_ARG_ENABLE(omitfp, dnl
83 [ --enable-omitfp build undebuggable optimized library [default=no]],
84 omitfp=$enableval, omitfp=no)
85 AC_ARG_ENABLE(bounded, dnl
86 [ --enable-bounded build with runtime bounds checking [default=no]],
87 bounded=$enableval, bounded=no)
88 AC_ARG_ENABLE(versioning, dnl
89 [ --disable-versioning do not include versioning information in the
90 library objects [default=yes if supported]],
91 enable_versioning=$enableval, enable_versioning=yes)
93 dnl Generic infrastructure for drop-in additions to libc.
94 AC_ARG_ENABLE(add-ons, dnl
95 [ --enable-add-ons[=DIR1,DIR2]...
96 configure and build add-ons in DIR1,DIR2,...
97 search for add-ons if no parameter given],
98 [case "$enableval" in
99 yes) if test "$srcdir" = "."; then
100 add_ons=`echo */configure | sed -e 's!/configure!!g'`
101 else
102 add_ons=`echo $srcdir/*/configure | \
103 sed -e 's!/configure!!g' -e "s!$srcdir/!!g"`
104 fi;;
105 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
106 esac],
107 [add_ons=])
109 AC_CONFIG_SUBDIRS($add_ons)
110 add_ons_pfx=
111 if test x"$add_ons" != x; then
112 for f in $add_ons; do
113 # Test whether such a subdir really exists.
114 if test -d $srcdir/$f; then
115 add_ons_pfx="$add_ons_pfx $f/"
116 else
117 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
118 fi
119 done
120 fi
122 dnl On some platforms we cannot use dynamic loading. We must provide
123 dnl static NSS modules.
124 AC_ARG_ENABLE(static-nss, dnl
125 [ --enable-static-nss build static NSS modules [default=no]],
126 static_nss=$enableval, static_nss=no)
127 if test x"$static_nss" = xyes; then
128 AC_DEFINE(DO_STATIC_NSS)
129 fi
131 AC_ARG_ENABLE(force-install,
132 [ --disable-force-install don't force installation of files from this package,
133 even if they are older than the installed files],
134 force_install=$enableval, force_install=yes)
135 AC_SUBST(force_install)
137 AC_CANONICAL_HOST
139 # The way shlib-versions is used to generate soversions.mk uses a
140 # fairly simplistic model for name recognition that can't distinguish
141 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
142 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
143 # tell. This doesn't get used much beyond that, so it's fairly safe.
144 case "$host_os" in
145 linux*)
146 ;;
147 gnu*)
148 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
149 ;;
150 esac
152 ###
153 ### I put this here to prevent those annoying emails from people who cannot
154 ### read and try to compile glibc on unsupported platforms. --drepper
155 ###
156 ### By using the undocumented --enable-hacker-mode option for configure
157 ### one can skip this test to make the configuration not fail for unsupported
158 ### platforms.
159 ###
160 if test -z "$enable_hacker_mode"; then
161 case "$machine-$host_os" in
162 *-linux* | *-gnu* | arm*-none*)
163 ;;
164 *)
165 echo "*** The GNU C library is currently not available for this platform."
166 echo "*** So far nobody cared to port it and if there is no volunteer it"
167 echo "*** might never happen. So, if you have interest to see glibc on"
168 echo "*** this platform visit"
169 echo "*** http://www.gnu.org/software/libc/porting.html"
170 echo "*** and join the group of porters"
171 exit 1
172 ;;
173 esac
174 fi
176 # We keep the original values in `$config_*' and never modify them, so we
177 # can write them unchanged into config.make. Everything else uses
178 # $machine, $vendor, and $os, and changes them whenever convenient.
179 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
181 # Some configurations imply other options.
182 case "$host_os" in
183 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
184 # These systems always use GNU tools.
185 gnu_ld=yes gnu_as=yes ;;
186 esac
187 case "$host_os" in
188 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
189 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
190 ;;
191 gnu* | linux* | sysv4* | solaris2* | irix6*)
192 # These systems (almost) always use the ELF format.
193 elf=yes
194 ;;
195 esac
197 machine=$config_machine
198 vendor=$config_vendor
199 os=$config_os
201 dnl We need to use [ and ] for other purposes for a while now.
202 changequote(,)dnl
203 # Expand the configuration machine name into a subdirectory by architecture
204 # type and particular chip.
205 case "$machine" in
206 a29k | am29000) base_machine=a29k machine=a29k ;;
207 alpha*) base_machine=alpha machine=alpha/$machine ;;
208 arm*) base_machine=arm machine=arm/$machine ;;
209 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
210 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
211 hppa*) base_machine=hppa machine=hppa/$machine ;;
212 i[3456]86) base_machine=i386 machine=i386/$machine ;;
213 m680?0) base_machine=m68k machine=m68k/$machine ;;
214 m68k) base_machine=m68k machine=m68k/m68020 ;;
215 m88???) base_machine=m88k machine=m88k/$machine ;;
216 m88k) base_machine=m88k machine=m88k/m88100 ;;
217 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
218 mips*) base_machine=mips
219 case "`uname -m`" in
220 IP22) machine=mips/mips3 ;;
221 *) machine=mips/$machine ,,
222 esac ;;
223 sparc | sparcv[67])
224 base_machine=sparc machine=sparc/sparc32 ;;
225 sparcv8 | supersparc | hypersparc)
226 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
227 sparc64 | ultrasparc)
228 base_machine=sparc machine=sparc/sparc64 ;;
229 esac
230 changequote([,])dnl
231 AC_SUBST(base_machine)
233 if test "$base_machine" = "i386"; then
234 AC_DEFINE(USE_REGPARMS)
235 fi
237 # Compute the list of sysdep directories for this configuration.
238 # This can take a while to compute.
239 sysdep_dir=$srcdir/sysdeps
240 AC_MSG_CHECKING(sysdep dirs)
241 dnl We need to use [ and ] for other purposes for a while now.
242 changequote(,)dnl
243 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
244 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
246 case "$os" in
247 gnu*)
248 base_os=mach/hurd ;;
249 netbsd* | 386bsd* | freebsd* | bsdi*)
250 base_os=unix/bsd/bsd4.4 ;;
251 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
252 base_os=unix/bsd ;;
253 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
254 base_os=unix/sysv ;;
255 irix6*)
256 base_os=unix/sysv/irix6/$os ;;
257 solaris[2-9]*)
258 base_os=unix/sysv/sysv4 ;;
259 none)
260 base_os=standalone ;;
261 *)
262 base_os='' ;;
263 esac
265 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
266 tail=$os
267 ostry=$os
268 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
269 ostry="$ostry /$o"
270 tail=$o
271 done
272 o=`echo $tail | sed 's/[0-9]*$//'`
273 if test $o != $tail; then
274 ostry="$ostry /$o"
275 fi
276 # For linux-gnu, try linux-gnu, then linux.
277 o=`echo $tail | sed 's/-.*$//'`
278 if test $o != $tail; then
279 ostry="$ostry /$o"
280 fi
282 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
283 base=
284 tail=$base_os
285 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
286 set $b
287 base="$base /$1"
288 tail="$2"
289 done
291 # For sparc/sparc9, try sparc/sparc9 and then sparc.
292 mach=
293 tail=$machine
294 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
295 set $m
296 # Prepend the machine's FPU directory unless --without-fp.
297 if test "$with_fp" = yes; then
298 mach="$mach /$1/fpu"
299 fi
300 mach="$mach /$1"
301 tail="$2"
302 done
304 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
305 changequote([,])dnl
307 # Find what sysdep directories exist.
308 sysnames=
309 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
310 for d in $add_ons_pfx ''; do
311 for b in $base ''; do
312 for m0 in $mach ''; do
313 for v in /$vendor ''; do
314 test "$v" = / && continue
315 for o in /$ostry ''; do
316 test "$o" = / && continue
317 for m in $mach ''; do
318 if test "$m0$b$v$o$m"; then
319 try="${d}sysdeps$m0$b$v$o$m"
320 test -n "$enable_debug_configure" &&
321 echo "$0 [DEBUG]: try $try" >&2
322 case $try in
323 /*) dest=$try ;;
324 *) dest=$srcdir/$try ;;
325 esac
326 if test -d $dest; then
327 sysnames="$sysnames $try"
328 { test -n "$o" || test -n "$b"; } && os_used=t
329 { test -n "$m" || test -n "$m0"; } && machine_used=t
330 fi
331 fi
332 done
333 done
334 done
335 done
336 done
337 done
338 IFS="$ac_save_ifs"
340 if test -z "$os_used" && test "$os" != none; then
341 AC_MSG_ERROR(Operating system $os is not supported.)
342 fi
343 if test -z "$machine_used" && test "$machine" != none; then
344 AC_MSG_ERROR(The $machine is not supported.)
345 fi
347 # We have now validated the configuration.
350 # If using ELF, look for an `elf' subdirectory of each machine directory.
351 # We prepend these rather than inserting them whereever the machine appears
352 # because things specified by the machine's ELF ABI should override
353 # OS-specific things, and should always be the same for any OS on the
354 # machine (otherwise what's the point of an ABI?).
355 if test "$elf" = yes; then
356 elf_dirs=
357 for d in $add_ons_pfx ''; do
358 case $d in
359 /*) xsrcdir= ;;
360 *) xsrcdir=$srcdir/ ;;
361 esac
362 for m in $mach; do
363 if test -d $xsrcdir${d}sysdeps$m/elf; then
364 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
365 fi
366 done
367 done
368 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
369 fi
372 # Expand the list of system names into a full list of directories
373 # from each element's parent name and Implies file (if present).
374 set $sysnames
375 names=
376 while test $# -gt 0; do
377 name=$1
378 shift
380 case " $names " in *" $name "*)
381 # Already in the list.
382 continue
383 esac
385 # Report each name as we discover it, so there is no long pause in output.
386 echo $ac_n "$name $ac_c" >&AC_FD_MSG
388 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
390 case $name in
391 /*) xsrcdir= ;;
392 *) xsrcdir=$srcdir/ ;;
393 esac
394 test -n "$enable_debug_configure" &&
395 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
397 if test -f $xsrcdir$name/Implies; then
398 # Collect more names from the `Implies' file (removing comments).
399 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
400 implied=
401 for x in $implied_candidate; do
402 if test -d $xsrcdir$name_base/$x; then
403 implied="$implied $name_base/$x";
404 else
405 AC_MSG_WARN($name/Implies specifies nonexistent $x)
406 fi
407 done
408 else
409 implied=
410 fi
412 # Add NAME to the list of names.
413 names="$names $name"
415 # Find the parent of NAME, using the empty string if it has none.
416 changequote(,)dnl
417 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
418 changequote([,])dnl
420 # Add the names implied by NAME, and NAME's parent (if it has one), to
421 # the list of names to be processed (the argument list). We prepend the
422 # implied names to the list and append the parent. We want implied
423 # directories to come before further directories inferred from the
424 # configuration components; this ensures that for sysv4, unix/common
425 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
426 # after sysv4).
427 sysnames="`echo $implied $* $parent`"
428 test -n "$sysnames" && set $sysnames
429 done
431 # Add the default directories.
432 sysnames="$names sysdeps/generic"
433 AC_SUBST(sysnames)
434 # The other names were emitted during the scan.
435 AC_MSG_RESULT(sysdeps/generic)
438 ### Locate tools.
440 AC_PROG_INSTALL
441 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
442 # The makefiles need to use a different form to find it in $srcdir.
443 INSTALL='\$(..)./install-sh -c'
444 fi
445 AC_PROG_LN_S
447 # These programs are version sensitive.
448 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
449 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
450 [version \([egcst0-9.-]*\)],
451 [egcs-2.91.*|egcs-2.90.2[789]|egcs-2.90.[3-9][0-9]|*2.8.[1-9]*|*2.9.[0-9]*],
452 critic_missing=t)
453 AC_CHECK_PROG_VER(MAKE, make gmake, --version,
454 [version \([0-9][0-9.]*\), by],
455 [3.75 | 3.76.[1-9] | 3.7[789]* | 3.[89]*], critic_missing=t)
457 AC_CHECK_PROG_VER(MSGFMT, msgfmt gmsgfmt, --version,
458 [GNU gettext.*\([0-9][0-9]*\.[0-9]*\)],
459 [0.[1-9][0-9] | [1-9].*], MSGFMT=: aux_missing=t)
460 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
461 [GNU texinfo \([0-9][0-9.]*\)],
462 [3.1[1-9] | 3.[2-9][0-9]], MAKEINFO=: aux_missing=t)
464 if test -n "$critic_missing"; then
465 AC_MSG_ERROR([
466 *** Some critical program is missing or too old.
467 *** Check the INSTALL file for required versions.])
468 fi
470 test -n "$aux_missing" && AC_MSG_WARN([
471 *** An auxiliary program is missing or too old;
472 *** some features will be disabled.
473 *** Check the INSTALL file for required versions.])
475 AC_PROG_CC_LOCAL
476 AC_CANONICAL_BUILD
477 if test $host != $build; then
478 AC_CHECK_PROGS(BUILD_CC, gcc cc)
479 fi
480 AC_SUBST(cross_compiling)
481 AC_PROG_CPP
482 LIBC_PROG_BINUTILS
483 AC_CHECK_TOOL(AR, ar)
484 AC_CHECK_TOOL(RANLIB, ranlib, :)
485 AC_CHECK_TOOL(MIG, mig)
487 # if using special system headers, find out the compiler's sekrit
488 # header directory and add that to the list. NOTE: Only does the right
489 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
490 if test -n "$sysheaders"; then
491 ccheaders=`$CC -print-file-name=include`
492 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
493 fi
494 AC_SUBST(SYSINCLUDES)
496 # check if ranlib is necessary
497 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
498 cat > conftest.c <<EOF
499 int a;
500 char b;
501 void c(void) {}
502 EOF
503 $CC $CFLAGS -c conftest.c
504 $AR cr conftest.a conftest.c
505 cp conftest.a conftest2.a
506 $RANLIB conftest.a
507 if cmp -s conftest.a conftest2.a; then
508 libc_cv_ranlib_necessary=no
509 else
510 libc_cv_ranlib_necessary=yes
511 fi
512 rm -rf conftest*])
513 if test "$libc_cv_ranlib_necessary" = no; then
514 RANLIB=:
515 fi
517 # Test if LD_LIBRARY_PATH contains the notation for the current directory
518 # since this would lead to problems installing/building glibc.
519 # LD_LIBRARY_PATH contains the current directory if one of the following
520 # is true:
521 # - one of the terminals (":" and ";") is the first or last sign
522 # - two terminals occur directly after each other
523 # - the path contains an element with a dot in it
524 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
525 changequote(,)dnl
526 case ${LD_LIBRARY_PATH} in
527 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
528 ld_library_path_setting="contains current directory"
529 ;;
530 *)
531 ld_library_path_setting="ok"
532 ;;
533 esac
534 changequote([,])dnl
535 AC_MSG_RESULT($ld_library_path_setting)
536 if test "$ld_library_path_setting" != "ok"; then
537 AC_MSG_ERROR([
538 *** LD_LIBRARY_PATH shouldn't contain the current directory when
539 *** building glibc. Please change the environment variable
540 *** and run configure again.])
541 fi
543 AC_PATH_PROG(BASH, bash, no)
544 if test "$BASH" != no &&
545 $BASH -c 'test "$BASH_VERSINFO" \
546 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
547 libc_cv_have_bash2=yes
548 else
549 libc_cv_have_bash2=no
550 fi
551 AC_SUBST(libc_cv_have_bash2)
553 dnl We need a ksh compatible shell for tzselect.
554 if test "$BASH" = no; then
555 AC_PATH_PROG(KSH, ksh, no)
556 if test "$KSH" = no; then
557 libc_cv_have_ksh=no
558 else
559 libc_cv_have_ksh=yes
560 fi
561 else
562 KSH="$BASH"
563 AC_SUBST(KSH)
564 libc_cv_have_ksh=yes
565 fi
566 AC_SUBST(libc_cv_have_ksh)
568 AC_PROG_AWK
569 AC_PATH_PROGS(PERL, perl, no)
570 AC_SUBST(PERL)
572 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
573 echo '#include <stddef.h>
574 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
575 if eval "$ac_cpp conftest.c 2>/dev/null" \
576 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
577 libc_cv_signed_size_t=no
578 else
579 libc_cv_signed_size_t=yes
580 fi
581 rm -f conftest*])
582 if test $libc_cv_signed_size_t = yes; then
583 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
584 cat >> confdefs.h <<\EOF
585 #undef __SIZE_TYPE__
586 #define __SIZE_TYPE__ unsigned
587 EOF
588 fi
590 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
591 AC_TRY_COMPILE(dnl
592 [#define __need_size_t
593 #define __need_wchar_t
594 #include <stddef.h>
595 #define __need_NULL
596 #include <stddef.h>], [size_t size; wchar_t wchar;
597 #ifdef offsetof
598 #error stddef.h ignored __need_*
599 #endif
600 if (&size == NULL || &wchar == NULL) abort ();],
601 libc_cv_friendly_stddef=yes,
602 libc_cv_friendly_stddef=no)])
603 if test $libc_cv_friendly_stddef = yes; then
604 config_vars="$config_vars
605 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
606 fi
608 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
609 libc_cv_need_minus_P, [dnl
610 cat > conftest.S <<EOF
611 #include "confdefs.h"
612 /* Nothing whatsoever. */
613 EOF
614 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
615 libc_cv_need_minus_P=no
616 else
617 libc_cv_need_minus_P=yes
618 fi
619 rm -f conftest*])
620 if test $libc_cv_need_minus_P = yes; then
621 config_vars="$config_vars
622 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
623 fi
625 AC_CACHE_CHECK(for assembler global-symbol directive,
626 libc_cv_asm_global_directive, [dnl
627 libc_cv_asm_global_directive=UNKNOWN
628 for ac_globl in .globl .global; do
629 cat > conftest.s <<EOF
630 .text
631 ${ac_globl} foo
632 foo:
633 EOF
634 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
635 libc_cv_asm_global_directive=${ac_globl}
636 fi
637 rm -f conftest*
638 test $libc_cv_asm_global_directive != UNKNOWN && break
639 done])
640 if test $libc_cv_asm_global_directive = UNKNOWN; then
641 AC_MSG_ERROR(cannot determine asm global directive)
642 else
643 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
644 fi
646 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
647 cat > conftest.s <<EOF
648 .text
649 foo:
650 .set glibc_conftest_frobozz,foo
651 $libc_cv_asm_global_directive glibc_conftest_frobozz
652 EOF
653 # The alpha-dec-osf1 assembler gives only a warning for `.set'
654 # (but it doesn't work), so we must do a linking check to be sure.
655 cat > conftest1.c <<\EOF
656 extern int glibc_conftest_frobozz;
657 main () { printf ("%d\n", glibc_conftest_frobozz); }
658 EOF
659 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
660 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
661 libc_cv_asm_set_directive=yes
662 else
663 libc_cv_asm_set_directive=no
664 fi
665 rm -f conftest*])
666 if test $libc_cv_asm_set_directive = yes; then
667 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
668 fi
670 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
671 [cat > conftest.s <<EOF
672 .text
673 _sym:
674 .symver _sym,sym@VERS
675 EOF
676 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
677 libc_cv_asm_symver_directive=yes
678 else
679 libc_cv_asm_symver_directive=no
680 fi
681 rm -f conftest*])
682 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
683 if test $libc_cv_asm_symver_directive = yes; then
684 cat > conftest.s <<EOF
685 .text
686 _sym:
687 .symver _sym,sym@VERS
688 EOF
689 cat > conftest.map <<EOF
690 VERS_1 {
691 global: sym;
692 };
694 VERS_2 {
695 global: sym;
696 } VERS_1;
697 EOF
698 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
699 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
700 -nostartfiles -nostdlib
701 -Wl,--version-script,conftest.map
702 1>&AC_FD_CC]);
703 then
704 libc_cv_ld_version_script_option=yes
705 else
706 libc_cv_ld_version_script_option=no
707 fi
708 else
709 libc_cv_ld_version_script_option=no
710 fi
711 else
712 libc_cv_ld_version_script_option=no
713 fi
714 rm -f conftest*])
715 if test $libc_cv_asm_symver_directive = yes &&
716 test $libc_cv_ld_version_script_option = yes &&
717 test $enable_versioning = yes; then
718 VERSIONING=yes
719 AC_DEFINE(DO_VERSIONING)
720 else
721 VERSIONING=no
722 fi
723 AC_SUBST(VERSIONING)
725 if test $VERSIONING = no; then
726 echo "\
727 *** WARNING: You should not compile GNU libc without versioning. Not using
728 *** versioning will introduce incompatibilities so that old binaries
729 *** will not run anymore.
730 *** For versioning you need recent binutils (binutils-2.8.1.0.17 or newer)."
731 fi
732 if test $elf = yes; then
733 AC_CACHE_CHECK(for .previous assembler directive,
734 libc_cv_asm_previous_directive, [dnl
735 cat > conftest.s <<EOF
736 .section foo_section
737 .previous
738 EOF
739 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
740 libc_cv_asm_previous_directive=yes
741 else
742 libc_cv_asm_previous_directive=no
743 fi
744 rm -f conftest*])
745 if test $libc_cv_asm_previous_directive = yes; then
746 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
747 else
748 AC_CACHE_CHECK(for .popsection assembler directive,
749 libc_cv_asm_popsection_directive, [dnl
750 cat > conftest.s <<EOF
751 .pushsection foo_section
752 .popsection
753 EOF
754 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
755 libc_cv_asm_popsection_directive=yes
756 else
757 libc_cv_asm_popsection_directive=no
758 fi
759 rm -f conftest*])
760 if test $libc_cv_asm_popsection_directive = yes; then
761 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
762 fi
763 fi
764 fi
766 if test $elf != yes; then
767 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
768 [AC_TRY_COMPILE(, [asm (".section .init");
769 asm (".section .fini");
770 asm (".text");],
771 libc_cv_have_initfini=yes,
772 libc_cv_have_initfini=no)])
773 AC_SUBST(libc_cv_have_initfini)dnl
774 if test $libc_cv_have_initfini = yes; then
775 AC_DEFINE(HAVE_INITFINI)
776 fi
777 fi
779 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
780 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
781 [cat > conftest.$ac_ext <<EOF
782 dnl This sometimes fails to find confdefs.h, for some reason.
783 dnl [#]line __oline__ "[$]0"
784 [#]line __oline__ "configure"
785 #include "confdefs.h"
786 void underscore_test(void) {
787 return; }
788 EOF
789 if AC_TRY_EVAL(ac_compile); then
790 if grep _underscore_test conftest* >/dev/null; then
791 ifelse([$1], , :, [rm -f conftest*
792 $1])
793 else
794 ifelse([$2], , , [rm -f conftest*
795 $2])
796 fi
797 else
798 echo "configure: failed program was:" >&AC_FD_CC
799 cat conftest.$ac_ext >&AC_FD_CC
800 ifelse([$2], , , [rm -f conftest*
801 $2])
802 fi
803 rm -f conftest*])
805 if test $elf = yes; then
806 libc_cv_asm_underscores=no
807 else
808 if test $ac_cv_prog_cc_works = yes; then
809 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
810 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
811 libc_cv_asm_underscores=yes,
812 libc_cv_asm_underscores=no)])
813 else
814 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
815 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
816 libc_cv_asm_underscores=no)])
817 fi
818 fi
819 if test $libc_cv_asm_underscores = no; then
820 AC_DEFINE(NO_UNDERSCORES)
821 fi
823 if test $elf = yes; then
824 libc_cv_weak_symbols=yes
825 fi
827 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
828 [dnl
829 cat > conftest.s <<EOF
830 .text
831 ${libc_cv_asm_global_directive} foo
832 foo:
833 .weak foo
834 .weak bar; bar = foo
835 EOF
836 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
837 libc_cv_asm_weak_directive=yes
838 else
839 libc_cv_asm_weak_directive=no
840 fi
841 rm -f conftest*])
843 if test $libc_cv_asm_weak_directive = no; then
844 AC_CACHE_CHECK(for assembler .weakext directive,
845 libc_cv_asm_weakext_directive,
846 [dnl
847 cat > conftest.s <<EOF
848 .text
849 ${libc_cv_asm_global_directive} foo
850 foo:
851 .weakext bar foo
852 .weakext baz
853 ${libc_cv_asm_global_directive} baz
854 baz:
855 EOF
856 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
857 libc_cv_asm_weakext_directive=yes
858 else
859 libc_cv_asm_weakext_directive=no
860 fi
861 rm -f conftest*])
863 fi # no .weak
865 if test $libc_cv_asm_weak_directive = yes; then
866 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
867 elif test $libc_cv_asm_weakext_directive = yes; then
868 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
869 fi
871 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
872 cat > conftest.c <<\EOF
873 _start () {}
874 int __eh_pc;
875 __throw () {}
876 EOF
877 dnl No \ in command here because it ends up inside ''.
878 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
879 -nostdlib -nostartfiles -Wl,--no-whole-archive
880 -o conftest conftest.c 1>&AC_FD_CC]); then
881 libc_cv_ld_no_whole_archive=yes
882 else
883 libc_cv_ld_no_whole_archive=no
884 fi
885 rm -f conftest*])
886 if test $libc_cv_ld_no_whole_archive = yes; then
887 no_whole_archive=-Wl,--no-whole-archive
888 fi
889 AC_SUBST(no_whole_archive)dnl
891 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
892 cat > conftest.c <<\EOF
893 _start () {}
894 int __eh_pc;
895 __throw () {}
896 EOF
897 dnl No \ in command here because it ends up inside ''.
898 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
899 -nostdlib -nostartfiles -fno-exceptions
900 -o conftest conftest.c 1>&AC_FD_CC]); then
901 libc_cv_gcc_no_exceptions=yes
902 else
903 libc_cv_gcc_no_exceptions=no
904 fi
905 rm -f conftest*])
906 if test $libc_cv_ld_no_whole_archive = yes; then
907 no_exceptions=-fno-exceptions
908 fi
909 AC_SUBST(no_exceptions)dnl
911 if test "$base_machine" = alpha ; then
912 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
913 cat > conftest.c <<\EOF
914 foo () { }
915 EOF
916 dnl
917 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
918 then
919 libc_cv_gcc_alpha_ng_prefix=yes
920 else
921 libc_cv_gcc_alpha_ng_prefix=no
922 fi
923 rm -f conftest* ])
924 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
925 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
926 else
927 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
928 fi
929 fi
931 if test "$host_cpu" = powerpc ; then
932 # Check for a bug present in at least versions 2.8.x of GCC
933 # and versions 1.0.x of EGCS.
934 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
935 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
936 libc_cv_c_asmcr0_bug='no',
937 libc_cv_c_asmcr0_bug='yes')])
938 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
939 AC_DEFINE(BROKEN_PPC_ASM_CR0)
940 fi
941 fi
943 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
944 [cat > conftest.c <<EOF
945 #line __oline__ "configure"
946 static char __EH_FRAME_BEGIN__[];
947 _start ()
948 {
949 #ifdef CHECK__register_frame
950 __register_frame (__EH_FRAME_BEGIN__);
951 __deregister_frame (__EH_FRAME_BEGIN__);
952 #endif
953 #ifdef CHECK__register_frame_info
954 __register_frame_info (__EH_FRAME_BEGIN__);
955 __deregister_frame_info (__EH_FRAME_BEGIN__);
956 #endif
957 }
958 int __eh_pc;
959 __throw () {}
960 /* FIXME: this is fragile. */
961 malloc () {}
962 strcmp () {}
963 strlen () {}
964 memcpy () {}
965 memset () {}
966 free () {}
967 abort () {}
968 __bzero () {}
969 EOF
970 dnl No \ in command here because it ends up inside ''.
971 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
972 -nostdlib -nostartfiles
973 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
974 libc_cv_gcc_dwarf2_unwind_info=static
975 else
976 libc_cv_gcc_dwarf2_unwind_info=no
977 fi
978 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
979 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
980 -nostdlib -nostartfiles
981 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
982 libc_cv_gcc_dwarf2_unwind_info=yes
983 else
984 libc_cv_gcc_dwarf2_unwind_info=no
985 fi
986 fi
987 rm -f conftest*])
988 case $libc_cv_gcc_dwarf2_unwind_info in
989 yes)
990 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
991 ;;
992 static)
993 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
994 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
995 ;;
996 esac
998 ### End of automated tests.
999 ### Now run sysdeps configure fragments.
1001 # sysdeps configure fragments may set these with files to be linked below.
1002 libc_link_dests=
1003 libc_link_sources=
1005 # They also can set these variables.
1006 ldd_rewrite_script=no
1008 # Iterate over all the sysdep directories we will use, running their
1009 # configure fragments, and looking for a uname implementation.
1010 uname=
1011 for dir in $sysnames; do
1012 case $dir in
1013 /*) dest=$dir ;;
1014 *) dest=$srcdir/$dir ;;
1015 esac
1016 if test -r $dest/configure; then
1017 AC_MSG_RESULT(running configure fragment for $dest)
1018 . $dest/configure
1019 fi
1020 [
1021 if test -z "$uname"; then
1022 if test -r $dest/uname.c ||
1023 test -r $dest/uname.S ||
1024 { test -r $dest/syscalls.list &&
1025 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1026 uname=$dir
1027 fi
1028 fi
1029 ]dnl
1030 done
1032 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1034 # If we will use the generic uname implementation, we must figure out what
1035 # it will say by examining the system, and write the results in config-name.h.
1036 if test "$uname" = "sysdeps/generic"; then
1038 changequote(,)dnl
1039 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1040 changequote([,])dnl
1041 if test $uname_sysname != $config_os; then
1042 config_release=`echo $config_os | sed s/$uname_sysname//`
1043 fi
1044 dnl
1045 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1046 if test -r /vmunix; then
1047 kernel_id=`strings /vmunix | grep UNIX`
1048 elif test -r /dynix; then
1049 kernel_id=`strings /dynix | grep DYNIX`
1050 else
1051 kernel_id=
1052 fi
1053 ])dnl
1055 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1056 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1057 changequote(,)dnl
1058 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1059 changequote([,])dnl
1060 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1061 != x$config_release; then
1062 # The configuration release is a substring of the kernel release.
1063 libc_cv_uname_release=$kernel_release
1064 elif test x$config_release != x; then
1065 libc_cv_uname_release=$config_release
1066 elif test x$kernel_release != x; then
1067 libc_cv_uname_release=$kernel_release
1068 else
1069 libc_cv_uname_release=unknown
1070 fi])
1071 uname_release="$libc_cv_uname_release"
1073 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1074 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1075 changequote(,)dnl
1076 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1077 changequote([,])dnl
1078 if test -n "$kernel_version"; then
1079 libc_cv_uname_version="$kernel_version"
1080 else
1081 libc_cv_uname_version=unknown
1082 fi])
1083 uname_version="$libc_cv_uname_version"
1085 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1086 config_uname=config-name.h:config-name.in
1087 else
1088 # For non-generic uname, we don't need to create config-name.h at all.
1089 config_uname=
1090 fi
1092 AC_MSG_CHECKING(stdio selection)
1093 AC_SUBST(stdio)
1094 case $stdio in
1095 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1096 default) stdio=stdio ;;
1097 esac
1098 AC_MSG_RESULT($stdio)
1100 AC_MSG_CHECKING(ldap selection)
1101 AC_SUBST(LDAP)
1102 case $add_ons in
1103 *ldap*)
1104 ldap=yes
1105 LDAP=ldap ;;
1106 *) ldap=no
1107 LDAP= ;;
1108 esac
1109 AC_MSG_RESULT($ldap)
1111 AC_SUBST(libc_cv_slibdir)
1112 AC_SUBST(libc_cv_sysconfdir)
1113 AC_SUBST(libc_cv_rootsbindir)
1115 AC_SUBST(has_ldconfig)
1116 AC_SUBST(ldd_rewrite_script)
1118 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1119 if test $gnu_ld = yes; then
1120 AC_DEFINE(HAVE_GNU_LD)
1121 fi
1122 if test $gnu_as = yes; then
1123 AC_DEFINE(HAVE_GNU_AS)
1124 fi
1125 if test $elf = yes; then
1126 AC_DEFINE(HAVE_ELF)
1127 fi
1129 AC_SUBST(static)
1130 AC_SUBST(shared)
1131 if test $shared = default; then
1132 if test $gnu_ld = yes; then
1133 shared=$elf
1134 else
1135 # For now we do not assume shared libs are available. In future more
1136 # tests might become available.
1137 shared=no
1138 fi
1139 fi
1141 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1142 [pic_default=yes
1143 cat > conftest.c <<EOF
1144 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1145 # error PIC is default.
1146 #endif
1147 EOF
1148 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1149 pic_default=no
1150 fi
1151 rm -f conftest.*])
1152 AC_SUBST(pic_default)
1154 AC_SUBST(profile)
1155 AC_SUBST(omitfp)
1156 AC_SUBST(bounded)
1157 AC_SUBST(static_nss)
1158 AC_SUBST(nopic_initfini)
1160 AC_SUBST(DEFINES)
1162 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1163 config_makefile=
1164 else
1165 config_makefile=Makefile
1166 fi
1168 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1169 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1170 AC_SUBST(VERSION)
1171 AC_SUBST(RELEASE)
1173 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1174 [echo '$config_vars' >> config.make; test -d bits || mkdir bits])