| blob | 9b8a1eb26d4f6f109c2f0d093f1584bdc93dce5c |
1 dnl Process this file with autoconf to produce a configure script.
2 AC_REVISION([$CVSid$])
3 AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required.
4 AC_INIT([GNU C Library], [(see version.h)], [glibc])
5 AC_CONFIG_SRCDIR([include/features.h])
6 AC_CONFIG_HEADERS([config.h])
7 AC_CONFIG_AUX_DIR([scripts])
9 if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
10 AC_MSG_ERROR([you must configure in a separate build directory])
11 fi
13 # This will get text that should go into config.make.
14 config_vars=
16 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
17 AC_ARG_WITH([gmp],
18 AC_HELP_STRING([--with-gmp=DIRECTORY],
19 [find GMP source code in DIRECTORY (not needed)]),
20 [
21 case "$with_gmp" in
22 yes) AC_MSG_ERROR([--with-gmp requires an argument; use --with-gmp=DIRECTORY]) ;;
23 ''|no) ;;
24 *) config_vars="$config_vars
25 gmp-srcdir = $withval" ;;
26 esac
27 ])
28 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
29 AC_ARG_WITH([gd],
30 AC_HELP_STRING([--with-gd=DIR],
31 [find libgd include dir and library with prefix DIR]),
32 [dnl
33 case "$with_gd" in
34 yes|''|no) ;;
35 *) libgd_include="-I$withval/include"
36 libgd_ldflags="-L$withval/lib" ;;
37 esac
38 ])
39 AC_ARG_WITH([gd-include],
40 AC_HELP_STRING([--with-gd-include=DIR],
41 [find libgd include files in DIR]),
42 [dnl
43 case "$with_gd_include" in
44 ''|no) ;;
45 *) libgd_include="-I$withval" ;;
46 esac
47 ])
48 AC_ARG_WITH([gd-lib],
49 AC_HELP_STRING([--with-gd-lib=DIR],
50 [find libgd library files in DIR]),
51 [dnl
52 case "$with_gd_lib" in
53 ''|no) ;;
54 *) libgd_ldflags="-L$withval" ;;
55 esac
56 ])
58 if test -n "$libgd_include"; then
59 config_vars="$config_vars
60 CFLAGS-memusagestat.c = $libgd_include"
61 fi
62 if test -n "$libgd_ldflags"; then
63 config_vars="$config_vars
64 libgd-LDFLAGS = $libgd_ldflags"
65 fi
67 dnl Arguments to specify presence of other packages/features.
68 AC_ARG_WITH([fp],
69 AC_HELP_STRING([--with-fp],
70 [if using floating-point hardware @<:@default=yes@:>@]),
71 [with_fp=$withval],
72 [with_fp=yes])
73 AC_SUBST(with_fp)
74 AC_ARG_WITH([binutils],
75 AC_HELP_STRING([--with-binutils=PATH],
76 [specify location of binutils (as and ld)]),
77 [path_binutils=$withval],
78 [path_binutils=''])
79 AC_ARG_WITH([elf],
80 AC_HELP_STRING([--with-elf],
81 [if using the ELF object format]),
82 [elf=$withval],
83 [elf=no])
84 AC_ARG_WITH([selinux],
85 AC_HELP_STRING([--with-selinux],
86 [if building with SELinux support]),
87 [with_selinux=$withval],
88 [with_selinux=auto])
89 AC_ARG_WITH([xcoff],
90 AC_HELP_STRING([--with-xcoff],
91 [if using the XCOFF object format]),
92 [xcoff=$withval],
93 [xcoff=no])
94 AC_ARG_WITH([cvs],
95 AC_HELP_STRING([--without-cvs],
96 [if CVS should not be used]),
97 [with_cvs=$withval],
98 [with_cvs=yes])
99 if test "$with_cvs" = yes; then
100 if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
101 then
102 with_cvs=no
103 fi
104 fi
105 AC_SUBST(with_cvs)
107 AC_ARG_WITH([headers],
108 AC_HELP_STRING([--with-headers=PATH],
109 [location of system headers to use
110 (for example /usr/src/linux/include)
111 @<:@default=compiler default@:>@]),
112 [sysheaders=$withval],
113 [sysheaders=''])
115 AC_ARG_ENABLE([sanity-checks],
116 AC_HELP_STRING([--disable-sanity-checks],
117 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
118 [enable_sanity=$enableval],
119 [enable_sanity=yes])
121 AC_SUBST(enable_check_abi)
122 AC_ARG_ENABLE([check-abi],
123 AC_HELP_STRING([--enable-check-abi],
124 [do "make check-abi" in "make check" (no/warn/yes)
125 @<:@default=no@:>@]),
126 [enable_check_abi=$enableval],
127 [enable_check_abi=no])
129 dnl Arguments to enable or disable building the static, shared, profiled,
130 dnl and -fomit-frame-pointer libraries.
131 dnl I've disabled this for now since we cannot build glibc without static
132 dnl libraries built in the moment.
133 dnl AC_ARG_ENABLE([static],
134 dnl AC_HELP_STRING([--enable-static],
135 dnl [build static library @<:@default=yes@:>@]),
136 dnl [static=$enableval],
137 dnl [static=yes])
138 static=yes
139 AC_ARG_ENABLE([shared],
140 AC_HELP_STRING([--enable-shared],
141 [build shared library @<:@default=yes if GNU ld & ELF@:>@]),
142 [shared=$enableval],
143 [shared=default])
144 AC_ARG_ENABLE([profile],
145 AC_HELP_STRING([--enable-profile],
146 [build profiled library @<:@default=yes@:>@]),
147 [profile=$enableval],
148 [profile=yes])
149 AC_ARG_ENABLE([omitfp],
150 AC_HELP_STRING([--enable-omitfp],
151 [build undebuggable optimized library @<:@default=no@:>@]),
152 [omitfp=$enableval],
153 [omitfp=no])
154 AC_ARG_ENABLE([bounded],
155 AC_HELP_STRING([--enable-bounded],
156 [build with runtime bounds checking @<:@default=no@:>@]),
157 [bounded=$enableval],
158 [bounded=no])
159 AC_ARG_ENABLE([versioning],
160 AC_HELP_STRING([--disable-versioning],
161 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
162 [enable_versioning=$enableval],
163 [enable_versioning=yes])
165 AC_ARG_ENABLE([oldest-abi],
166 AC_HELP_STRING([--enable-oldest-abi=ABI],
167 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
168 [oldest_abi=$enableval],
169 [oldest_abi=no])
170 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
171 oldest_abi=default
172 else
173 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
174 fi
175 AC_SUBST(oldest_abi)
177 dnl Generic infrastructure for drop-in additions to libc.
178 AC_ARG_ENABLE([add-ons],
179 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
180 [configure and build add-ons in DIR1,DIR2,... search for add-ons if no parameter given]),
181 [case "$enableval" in
182 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
183 add_ons_automatic=yes
184 test "$add_ons" = "*" && add_ons= ;;
185 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`
186 add_ons_automatic=no ;;
187 esac],
188 [add_ons= add_ons_automatic=no])
190 dnl Let the user avoid using TLS. Don't know why but...
191 AC_ARG_WITH([tls],
192 AC_HELP_STRING([--with-tls],
193 [enable support for TLS]),
194 [usetls=$withval],
195 [usetls=yes])
197 AC_ARG_WITH([__thread],
198 AC_HELP_STRING([--without-__thread],
199 [do not use TLS features even when supporting them]),
200 [use__thread=$withval],
201 [use__thread=yes])
203 AC_ARG_ENABLE([hidden-plt],
204 AC_HELP_STRING([--disable-hidden-plt],
205 [do not hide internal function calls to avoid PLT]),
206 [hidden=$enableval],
207 [hidden=yes])
208 if test "x$hidden" = xno; then
209 AC_DEFINE(NO_HIDDEN)
210 fi
212 AC_ARG_ENABLE([bind-now],
213 AC_HELP_STRING([--enable-bind-now],
214 [disable lazy relocations in DSOs]),
215 [bindnow=$enableval],
216 [bindnow=no])
217 AC_SUBST(bindnow)
219 dnl On some platforms we cannot use dynamic loading. We must provide
220 dnl static NSS modules.
221 AC_ARG_ENABLE([static-nss],
222 AC_HELP_STRING([--enable-static-nss],
223 [build static NSS modules @<:@default=no@:>@]),
224 [static_nss=$enableval],
225 [static_nss=no])
226 dnl Enable static NSS also if we build no shared objects.
227 if test x"$static_nss" = xyes || test x"$shared" = xno; then
228 static_nss=yes
229 AC_DEFINE(DO_STATIC_NSS)
230 fi
232 AC_ARG_ENABLE([force-install],
233 AC_HELP_STRING([--disable-force-install],
234 [don't force installation of files from this package, even if they are older than the installed files]),
235 [force_install=$enableval],
236 [force_install=yes])
237 AC_SUBST(force_install)
239 dnl On some platforms we allow dropping compatibility with all kernel
240 dnl versions.
241 AC_ARG_ENABLE([kernel],
242 AC_HELP_STRING([--enable-kernel=VERSION],
243 [compile for compatibility with kernel not older than VERSION]),
244 [minimum_kernel=$enableval],
245 [])
246 dnl Prevent unreasonable values.
247 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
248 # Better nothing than this.
249 minimum_kernel=""
250 else
251 if test "$minimum_kernel" = current; then
252 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
253 fi
254 fi
256 dnl For the development we sometimes want gcc to issue even more warnings.
257 dnl This is not the default since many of the extra warnings are not
258 dnl appropriate.
259 AC_ARG_ENABLE([all-warnings],
260 AC_HELP_STRING([--enable-all-warnings],
261 [enable all useful warnings gcc can issue]),
262 [all_warnings=$enableval],
263 [])
264 AC_SUBST(all_warnings)
266 AC_CANONICAL_HOST
268 # The way shlib-versions is used to generate soversions.mk uses a
269 # fairly simplistic model for name recognition that can't distinguish
270 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
271 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
272 # tell. This doesn't get used much beyond that, so it's fairly safe.
273 case "$host_os" in
274 linux*)
275 ;;
276 gnu*)
277 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
278 ;;
279 esac
281 # We keep the original values in `$config_*' and never modify them, so we
282 # can write them unchanged into config.make. Everything else uses
283 # $machine, $vendor, and $os, and changes them whenever convenient.
284 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
286 # Don't allow vendor == "unknown"
287 test "$config_vendor" = unknown && config_vendor=
288 config_os="`echo $config_os | sed 's/^unknown-//'`"
290 # Some configurations imply other options.
291 case "$host_os" in
292 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
293 # These systems always use GNU tools.
294 gnu_ld=yes gnu_as=yes ;;
295 esac
296 case "$host_os" in
297 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
298 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
299 ;;
300 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
301 # These systems (almost) always use the ELF format.
302 elf=yes
303 ;;
304 aix*)
305 # These systems are always xcoff
306 xcoff=yes
307 elf=no
308 ;;
309 esac
311 # The configure fragment of an add-on port can modify these to supplement
312 # or override the table in the case statement below. No fragment should
313 # ever change the config_* variables, however.
314 machine=$config_machine
315 vendor=$config_vendor
316 os=$config_os
318 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
319 # Unify this here.
320 if test "$machine" = rs6000; then
321 machine="powerpc"
322 fi
324 # Braindead PowerPC box with absolutely no FPU.
325 case "$machine-$host_os" in
326 powerpc*-*soft)
327 with_fp=no
328 ;;
329 esac
332 # An add-on can set this when it the tuple to disable the sanity check below.
333 libc_config_ok=no
335 dnl Having this here, though empty, makes sure that if add-ons' fragments
336 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
337 dnl our AC_OUTPUT will actually use it.
338 AC_CONFIG_SUBDIRS()
340 add_ons_sfx=
341 add_ons_pfx=
342 if test x"$add_ons" != x; then
343 for f in $add_ons; do
344 # Some sanity checks
345 case "$f" in
346 crypt)
347 AC_MSG_ERROR([
348 *** It seems that you're using an old \`crypt' add-on. crypt is now
349 *** part of glibc and using the old add-on will not work with this
350 *** release. Start again with fresh sources and without the old
351 *** \`crypt' add-on.])
352 ;;
353 localedata)
354 AC_MSG_ERROR([
355 *** It seems that you're using an old \`localedata' add-on. localedata
356 *** is now part of glibc and using the old add-on will not work with
357 *** this release. Start again with fresh sources and without the old
358 *** \`localedata' add-on.])
359 ;;
360 esac
362 # Test whether such a subdir really exists.
363 test -d $srcdir/$f || {
364 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
365 }
366 done
368 # Now source each add-on's configure fragment.
369 # The fragments can use $srcdir/$libc_add_on to find themselves,
370 # and test $add_ons_automatic to see if they were explicitly requested.
371 # A fragment can clear (or even change) $libc_add_on to affect
372 # whether it goes into the list to be actually used in the build.
373 use_add_ons=
374 for libc_add_on in $add_ons; do
375 libc_add_on_frag=$srcdir/$libc_add_on/configure
376 if test -r $libc_add_on_frag; then
377 AC_MSG_RESULT(running configure fragment for add-on $libc_add_on)
378 . $libc_add_on_frag
379 else
380 AC_MSG_WARN(add-on fragment $libc_add_on_frag missing)
381 fi
382 if test -n "$libc_add_on"; then
383 use_add_ons="$use_add_ons $libc_add_on"
384 add_ons_pfx="$add_ons_pfx $libc_add_on/"
385 add_ons_sfx="$add_ons_sfx /$libc_add_on"
386 fi
387 done
388 # Use echo to strip excess whitespace.
389 add_ons="`echo $use_add_ons`"
390 fi
391 AC_SUBST(add_ons)
394 ###
395 ### I put this here to prevent those annoying emails from people who cannot
396 ### read and try to compile glibc on unsupported platforms. --drepper
397 ###
398 ### By using the undocumented --enable-hacker-mode option for configure
399 ### one can skip this test to make the configuration not fail for unsupported
400 ### platforms.
401 ###
402 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
403 case "$machine-$host_os" in
404 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
405 ;;
406 *)
407 echo "*** The GNU C library is currently not available for this platform."
408 echo "*** So far nobody cared to port it and if there is no volunteer it"
409 echo "*** might never happen. So, if you have interest to see glibc on"
410 echo "*** this platform visit"
411 echo "*** http://www.gnu.org/software/libc/porting.html"
412 echo "*** and join the group of porters"
413 exit 1
414 ;;
415 esac
416 fi
418 dnl We need to use [ and ] for other purposes for a while now.
419 changequote(,)dnl
420 # Expand the configuration machine name into a subdirectory by architecture
421 # type and particular chip. If an add-on configure fragment already set
422 # base_machine, we don't change it.
423 test -n "$base_machine" || case "$machine" in
424 a29k | am29000) base_machine=a29k machine=a29k ;;
425 alpha*) base_machine=alpha machine=alpha/$machine ;;
426 arm*) base_machine=arm machine=arm/arm32/$machine ;;
427 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
428 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
429 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
430 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
431 i[34567]86) base_machine=i386 machine=i386/$machine ;;
432 ia64) base_machine=ia64 machine=ia64 ;;
433 m680?0) base_machine=m68k machine=m68k/$machine ;;
434 m68k) base_machine=m68k machine=m68k/m68020 ;;
435 m88???) base_machine=m88k machine=m88k/$machine ;;
436 m88k) base_machine=m88k machine=m88k/m88100 ;;
437 mips64*) base_machine=mips64
438 case "$CC $CFLAGS $CPPFLAGS " in
439 *" -mabi=n32 "*) mips_cc_abi=n32 ;;
440 *" -mabi=64 "*|*" -mabi=n64 "*) mips_cc_abi=64 ;;
441 *" -mabi=32 "*|*" -mabi=o32 "*) mips_cc_abi=32 ;;
442 *) mips_cc_abi=default ;;
443 esac
444 case $config_os in
445 *abin32*) mips_config_abi=n32 ;;
446 *abi64*|*abin64*) mips_config_abi=64 ;;
447 *abi32*|*abio32*) mips_config_abi=32 ;;
448 *) mips_config_abi=$mips_cc_abi ;;
449 esac
450 case $mips_config_abi in
451 default) machine=mips/mips64/n32 mips_config_abi=n32 ;;
452 n32) machine=mips/mips64/n32 ;;
453 64) machine=mips/mips64/n64 ;;
454 32) machine=mips/mips32/kern64 ;;
455 esac
456 machine=$machine/$config_machine
457 if test $mips_config_abi != $mips_cc_abi; then
458 # This won't make it to config.make, but we want to
459 # set this in case configure tests depend on it.
460 CPPFLAGS="$CPPFLAGS -mabi=$mips_config_abi"
461 fi
462 ;;
463 mips*) base_machine=mips machine=mips/mips32/$machine ;;
464 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
465 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
466 s390) base_machine=s390 machine=s390/s390-32 ;;
467 s390x) base_machine=s390 machine=s390/s390-64 ;;
468 sh3*) base_machine=sh machine=sh/sh3 ;;
469 sh4*) base_machine=sh machine=sh/sh4 ;;
470 sparc | sparcv[67])
471 base_machine=sparc machine=sparc/sparc32 ;;
472 sparcv8 | supersparc | hypersparc)
473 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
474 sparcv8plus | sparcv8plusa | sparcv9)
475 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
476 sparcv8plusb | sparcv9b)
477 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
478 sparc64 | ultrasparc)
479 base_machine=sparc machine=sparc/sparc64 ;;
480 sparc64b | ultrasparc3)
481 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
482 thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
483 *) base_machine=$machine ;;
484 esac
485 changequote([,])dnl
486 AC_SUBST(base_machine)
488 if test "$base_machine" = "i386"; then
489 AC_DEFINE(USE_REGPARMS)
490 fi
492 # Compute the list of sysdep directories for this configuration.
493 # This can take a while to compute.
494 sysdep_dir=$srcdir/sysdeps
495 AC_MSG_CHECKING(sysdep dirs)
496 dnl We need to use [ and ] for other purposes for a while now.
497 changequote(,)dnl
498 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
499 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
501 case "$os" in
502 gnu*)
503 base_os=mach/hurd ;;
504 netbsd* | 386bsd* | freebsd* | bsdi*)
505 base_os=unix/bsd/bsd4.4 ;;
506 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
507 base_os=unix/bsd ;;
508 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
509 base_os=unix/sysv ;;
510 irix6*)
511 base_os=unix/sysv/irix6/$os ;;
512 solaris[2-9]*)
513 base_os=unix/sysv/sysv4 ;;
514 hpux*)
515 base_os=unix/sysv/hpux/$os ;;
516 aix4.3*)
517 base_os=unix/sysv/aix/aix4.3 ;;
518 none)
519 base_os=standalone ;;
520 *)
521 base_os='' ;;
522 esac
524 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
525 tail=$os
526 ostry=$os
527 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
528 ostry="$ostry /$o"
529 tail=$o
530 done
531 o=`echo $tail | sed 's/[0-9]*$//'`
532 if test $o != $tail; then
533 ostry="$ostry /$o"
534 fi
535 # For linux-gnu, try linux-gnu, then linux.
536 o=`echo $tail | sed 's/-.*$//'`
537 if test $o != $tail; then
538 ostry="$ostry /$o"
539 fi
541 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
542 base=
543 tail=$base_os
544 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
545 set $b
546 base="$base /$1"
547 tail="$2"
548 done
550 # For sparc/sparc32, try sparc/sparc32 and then sparc.
551 mach=
552 tail=$machine
553 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
554 set $m
555 # Prepend the machine's FPU directory unless --without-fp.
556 if test "$with_fp" = yes; then
557 mach="$mach /$1/fpu"
558 else
559 mach="$mach /$1/nofpu"
560 fi
561 mach="$mach /$1"
562 tail="$2"
563 done
565 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
566 changequote([,])dnl
568 # Find what sysdep directories exist.
569 sysnames=
570 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
571 for d in $add_ons_pfx ''; do
572 for b in $base ''; do
573 for m0 in $mach ''; do
574 for v in /$vendor ''; do
575 test "$v" = / && continue
576 for o in /$ostry ''; do
577 test "$o" = / && continue
578 for m in $mach ''; do
579 for a in $add_ons_sfx ''; do
580 if test "$m0$b$v$o$m"; then
581 try="${d}sysdeps$m0$b$v$o$m$a"
582 test -n "$enable_debug_configure" &&
583 echo "$0 [DEBUG]: try $try" >&2
584 if test -d $srcdir/$try; then
585 sysnames="$sysnames $try"
586 { test -n "$o" || test -n "$b"; } && os_used=t
587 { test -n "$m" || test -n "$m0"; } && machine_used=t
588 fi
589 fi
590 done
591 done
592 done
593 done
594 done
595 done
596 done
597 IFS="$ac_save_ifs"
599 if test -z "$os_used" && test "$os" != none; then
600 AC_MSG_ERROR(Operating system $os is not supported.)
601 fi
602 if test -z "$machine_used" && test "$machine" != none; then
603 AC_MSG_ERROR(The $machine is not supported.)
604 fi
606 # We have now validated the configuration.
609 # If using ELF, look for an `elf' subdirectory of each machine directory.
610 # We prepend these rather than inserting them whereever the machine appears
611 # because things specified by the machine's ELF ABI should override
612 # OS-specific things, and should always be the same for any OS on the
613 # machine (otherwise what's the point of an ABI?).
614 if test "$elf" = yes; then
615 elf_dirs=
616 for d in $add_ons_pfx ''; do
617 for m in $mach; do
618 if test -d $srcdir/${d}sysdeps$m/elf; then
619 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
620 fi
621 done
622 done
623 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
624 fi
627 # Expand the list of system names into a full list of directories
628 # from each element's parent name and Implies file (if present).
629 set $sysnames
630 names=
631 while test $# -gt 0; do
632 name=$1
633 shift
635 case " $names " in *" $name "*)
636 # Already in the list.
637 continue
638 esac
640 # Report each name as we discover it, so there is no long pause in output.
641 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
643 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
645 case $name in
646 /*) xsrcdir= ;;
647 *) xsrcdir=$srcdir/ ;;
648 esac
649 test -n "$enable_debug_configure" &&
650 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
652 if test -f $xsrcdir$name/Implies; then
653 # Collect more names from the `Implies' file (removing comments).
654 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
655 implied=
656 for x in $implied_candidate; do
657 found=no
658 if test -d $xsrcdir$name_base/$x; then
659 implied="$implied $name_base/$x";
660 found=yes
661 fi
662 for d in $add_ons_pfx ''; do
663 try="${d}sysdeps/$x"
664 case $d in
665 /*) try_srcdir= ;;
666 *) try_srcdir=$srcdir/ ;;
667 esac
668 test -n "$enable_debug_configure" &&
669 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
670 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
671 then
672 implied="$implied $try"
673 found=yes
674 fi
675 done
676 if test $found = no; then
677 AC_MSG_WARN($name/Implies specifies nonexistent $x)
678 fi
679 done
680 else
681 implied=
682 fi
684 # Add NAME to the list of names.
685 names="$names $name"
687 # Find the parent of NAME, using the empty string if it has none.
688 changequote(,)dnl
689 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
690 changequote([,])dnl
692 # Add the names implied by NAME, and NAME's parent (if it has one), to
693 # the list of names to be processed (the argument list). We prepend the
694 # implied names to the list and append the parent. We want implied
695 # directories to come before further directories inferred from the
696 # configuration components; this ensures that for sysv4, unix/common
697 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
698 # after sysv4).
699 sysnames="`echo $implied $* $parent`"
700 test -n "$sysnames" && set $sysnames
701 done
703 # Add the default directories.
704 default_sysnames=sysdeps/generic
705 if test "$elf" = yes; then
706 default_sysnames="sysdeps/generic/elf $default_sysnames"
707 fi
708 sysnames="$names $default_sysnames"
709 AC_SUBST(sysnames)
710 # The other names were emitted during the scan.
711 AC_MSG_RESULT($default_sysnames)
714 ### Locate tools.
716 AC_PROG_INSTALL
717 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
718 # The makefiles need to use a different form to find it in $srcdir.
719 INSTALL='\$(..)./scripts/install-sh -c'
720 fi
721 AC_PROG_LN_S
723 AC_PROG_CC
724 if test $host != $build; then
725 AC_CHECK_PROGS(BUILD_CC, gcc cc)
726 fi
727 AC_SUBST(cross_compiling)
728 AC_PROG_CPP
729 # We need the C++ compiler only for testing.
730 AC_PROG_CXX
731 LIBC_PROG_BINUTILS
732 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
734 # Accept binutils 2.13 or newer.
735 AC_CHECK_PROG_VER(AS, $AS, --version,
736 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
737 [2.1[3-9]*], AS=: critic_missing="$critic_missing as")
738 AC_CHECK_PROG_VER(LD, $LD, --version,
739 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
740 [2.1[3-9]*], LD=: critic_missing="$critic_missing ld")
742 # We need the physical current working directory. We cannot use the
743 # "pwd -P" shell builtin since that's not portable. Instead we try to
744 # find a pwd binary. Note that assigning to the PWD environment
745 # variable might have some interesting side effects, so we don't do
746 # that.
747 AC_PATH_PROG(PWD_P, pwd, no)
748 if test "$PWD_P" = no; then
749 AC_MSG_ERROR(*** A pwd binary could not be found.)
750 fi
752 # These programs are version sensitive.
753 AC_CHECK_TOOL_PREFIX
754 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
755 [version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]* | 4.[0-9]* ],
756 critic_missing="$critic_missing gcc")
757 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
758 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
759 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
761 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
762 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
763 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
764 MSGFMT=: aux_missing="$aux_missing msgfmt")
765 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
766 [GNU texinfo.* \([0-9][0-9.]*\)],
767 [4.*],
768 MAKEINFO=: aux_missing="$aux_missing makeinfo")
769 AC_CHECK_PROG_VER(SED, sed, --version,
770 [GNU sed version \([0-9]*\.[0-9.]*\)],
771 [3.0[2-9]*|3.[1-9]*|[4-9]*],
772 SED=: aux_missing="$aux_missing sed")
774 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
775 case "x$AUTOCONF" in
776 xno|x|x:) AUTOCONF=no ;;
777 *)
778 AC_CACHE_CHECK(dnl
779 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
780 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
781 libc_cv_autoconf_works=yes
782 else
783 libc_cv_autoconf_works=no
784 fi])
785 test $libc_cv_autoconf_works = yes || AUTOCONF=no
786 ;;
787 esac
788 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
789 # If --without-cvs they probably won't change configure.in, so no complaints.
790 aux_missing="$aux_missing autoconf"
791 fi
793 test -n "$critic_missing" && AC_MSG_ERROR([
794 *** These critical programs are missing or too old:$critic_missing
795 *** Check the INSTALL file for required versions.])
797 test -n "$aux_missing" && AC_MSG_WARN([
798 *** These auxiliary programs are missing or incompatible versions:$aux_missing
799 *** some features will be disabled.
800 *** Check the INSTALL file for required versions.])
802 # if using special system headers, find out the compiler's sekrit
803 # header directory and add that to the list. NOTE: Only does the right
804 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
805 if test -n "$sysheaders"; then
806 ccheaders=`$CC -print-file-name=include`
807 SYSINCLUDES="-nostdinc -isystem $ccheaders \
808 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
809 fi
810 AC_SUBST(SYSINCLUDES)
812 # check if ranlib is necessary
813 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
814 cat > conftest.c <<EOF
815 int a;
816 char b;
817 void c(void) {}
818 EOF
819 $CC $CFLAGS $CPPFLAGS -c conftest.c
820 $AR cr conftest.a conftest.o
821 cp conftest.a conftest2.a
822 $RANLIB conftest.a
823 if cmp -s conftest.a conftest2.a; then
824 libc_cv_ranlib_necessary=no
825 else
826 libc_cv_ranlib_necessary=yes
827 fi
828 rm -rf conftest*])
829 if test "$libc_cv_ranlib_necessary" = no; then
830 RANLIB=:
831 fi
833 # Test if LD_LIBRARY_PATH contains the notation for the current directory
834 # since this would lead to problems installing/building glibc.
835 # LD_LIBRARY_PATH contains the current directory if one of the following
836 # is true:
837 # - one of the terminals (":" and ";") is the first or last sign
838 # - two terminals occur directly after each other
839 # - the path contains an element with a dot in it
840 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
841 changequote(,)dnl
842 case ${LD_LIBRARY_PATH} in
843 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
844 ld_library_path_setting="contains current directory"
845 ;;
846 *)
847 ld_library_path_setting="ok"
848 ;;
849 esac
850 changequote([,])dnl
851 AC_MSG_RESULT($ld_library_path_setting)
852 if test "$ld_library_path_setting" != "ok"; then
853 AC_MSG_ERROR([
854 *** LD_LIBRARY_PATH shouldn't contain the current directory when
855 *** building glibc. Please change the environment variable
856 *** and run configure again.])
857 fi
859 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
860 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
861 libc_cv_gcc_static_libgcc=
862 else
863 libc_cv_gcc_static_libgcc=-static-libgcc
864 fi])
865 AC_SUBST(libc_cv_gcc_static_libgcc)
867 AC_PATH_PROG(BASH, bash, no)
868 if test "$BASH" != no &&
869 $BASH -c 'test "$BASH_VERSINFO" \
870 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
871 libc_cv_have_bash2=yes
872 else
873 libc_cv_have_bash2=no
874 fi
875 AC_SUBST(libc_cv_have_bash2)
877 dnl We need a ksh compatible shell for tzselect.
878 if test "$BASH" = no; then
879 AC_PATH_PROG(KSH, ksh, no)
880 if test "$KSH" = no; then
881 libc_cv_have_ksh=no
882 else
883 libc_cv_have_ksh=yes
884 fi
885 else
886 KSH="$BASH"
887 AC_SUBST(KSH)
888 libc_cv_have_ksh=yes
889 fi
890 AC_SUBST(libc_cv_have_ksh)
892 AC_PROG_AWK
893 AC_PATH_PROG(PERL, perl, no)
894 if test "$PERL" != no &&
895 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
896 PERL=no
897 fi
898 AC_PATH_PROG(INSTALL_INFO, install-info, no,
899 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
900 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
902 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
903 echo '#include <stddef.h>
904 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
905 if eval "$ac_cpp conftest.c 2>/dev/null" \
906 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
907 libc_cv_signed_size_t=no
908 else
909 libc_cv_signed_size_t=yes
910 fi
911 rm -f conftest*])
912 if test $libc_cv_signed_size_t = yes; then
913 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
914 cat >> confdefs.h <<\EOF
915 #undef __SIZE_TYPE__
916 #define __SIZE_TYPE__ unsigned
917 EOF
918 fi
920 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
921 AC_TRY_COMPILE(dnl
922 [#define __need_size_t
923 #define __need_wchar_t
924 #include <stddef.h>
925 #define __need_NULL
926 #include <stddef.h>], [size_t size; wchar_t wchar;
927 #ifdef offsetof
928 #error stddef.h ignored __need_*
929 #endif
930 if (&size == NULL || &wchar == NULL) abort ();],
931 libc_cv_friendly_stddef=yes,
932 libc_cv_friendly_stddef=no)])
933 if test $libc_cv_friendly_stddef = yes; then
934 config_vars="$config_vars
935 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
936 fi
938 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
939 libc_cv_need_minus_P, [dnl
940 cat > conftest.S <<EOF
941 #include "confdefs.h"
942 /* Nothing whatsoever. */
943 EOF
944 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
945 libc_cv_need_minus_P=no
946 else
947 libc_cv_need_minus_P=yes
948 fi
949 rm -f conftest*])
950 if test $libc_cv_need_minus_P = yes; then
951 config_vars="$config_vars
952 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
953 fi
955 AC_MSG_CHECKING(whether .text pseudo-op must be used)
956 AC_CACHE_VAL(libc_cv_dot_text, [dnl
957 cat > conftest.s <<EOF
958 .text
959 EOF
960 libc_cv_dot_text=
961 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
962 libc_cv_dot_text=.text
963 fi
964 rm -f conftest*])
965 if test -z "$libc_cv_dot_text"; then
966 AC_MSG_RESULT(no)
967 else
968 AC_MSG_RESULT(yes)
969 fi
971 AC_CACHE_CHECK(for assembler global-symbol directive,
972 libc_cv_asm_global_directive, [dnl
973 libc_cv_asm_global_directive=UNKNOWN
974 for ac_globl in .globl .global .EXPORT; do
975 cat > conftest.s <<EOF
976 ${libc_cv_dot_text}
977 ${ac_globl} foo
978 foo:
979 EOF
980 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
981 libc_cv_asm_global_directive=${ac_globl}
982 fi
983 rm -f conftest*
984 test $libc_cv_asm_global_directive != UNKNOWN && break
985 done])
986 if test $libc_cv_asm_global_directive = UNKNOWN; then
987 AC_MSG_ERROR(cannot determine asm global directive)
988 else
989 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
990 fi
992 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
993 cat > conftest.s <<EOF
994 ${libc_cv_dot_text}
995 foo:
996 .set glibc_conftest_frobozz,foo
997 $libc_cv_asm_global_directive glibc_conftest_frobozz
998 EOF
999 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1000 # (but it doesn't work), so we must do a linking check to be sure.
1001 cat > conftest1.c <<\EOF
1002 extern int glibc_conftest_frobozz;
1003 void _start() { glibc_conftest_frobozz = 1; }
1004 EOF
1005 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1006 -nostartfiles -nostdlib \
1007 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1008 libc_cv_asm_set_directive=yes
1009 else
1010 libc_cv_asm_set_directive=no
1011 fi
1012 rm -f conftest*])
1013 if test $libc_cv_asm_set_directive = yes; then
1014 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1015 fi
1017 AC_CACHE_CHECK(for assembler .type directive prefix,
1018 libc_cv_asm_type_prefix, [dnl
1019 libc_cv_asm_type_prefix=no
1020 for ac_try_prefix in '@' '%' '#'; do
1021 cat > conftest.s <<EOF
1022 ${libc_cv_dot_text}
1023 ${libc_cv_asm_global_directive} foo
1024 .type foo, ${ac_try_prefix}object
1025 .size foo, 1
1026 foo:
1027 .byte 1
1028 EOF
1029 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1030 libc_cv_asm_type_prefix=${ac_try_prefix}
1031 fi
1032 rm -f conftest*
1033 test "x$libc_cv_asm_type_prefix" != xno && break
1034 done])
1035 if test "x$libc_cv_asm_type_prefix" != xno; then
1036 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
1037 fi
1039 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1040 [cat > conftest.s <<EOF
1041 ${libc_cv_dot_text}
1042 _sym:
1043 .symver _sym,sym@VERS
1044 EOF
1045 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1046 libc_cv_asm_symver_directive=yes
1047 else
1048 libc_cv_asm_symver_directive=no
1049 fi
1050 rm -f conftest*])
1051 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1052 if test $libc_cv_asm_symver_directive = yes; then
1053 cat > conftest.s <<EOF
1054 ${libc_cv_dot_text}
1055 _sym:
1056 .symver _sym,sym@VERS
1057 EOF
1058 cat > conftest.map <<EOF
1059 VERS_1 {
1060 global: sym;
1061 };
1063 VERS_2 {
1064 global: sym;
1065 } VERS_1;
1066 EOF
1067 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1068 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1069 -o conftest.so conftest.o
1070 -nostartfiles -nostdlib
1071 -Wl,--version-script,conftest.map
1072 1>&AS_MESSAGE_LOG_FD]);
1073 then
1074 libc_cv_ld_version_script_option=yes
1075 else
1076 libc_cv_ld_version_script_option=no
1077 fi
1078 else
1079 libc_cv_ld_version_script_option=no
1080 fi
1081 else
1082 libc_cv_ld_version_script_option=no
1083 fi
1084 rm -f conftest*])
1085 if test $shared != no &&
1086 test $libc_cv_asm_symver_directive = yes &&
1087 test $libc_cv_ld_version_script_option = yes &&
1088 test $enable_versioning = yes; then
1089 VERSIONING=yes
1090 AC_DEFINE(DO_VERSIONING)
1091 else
1092 VERSIONING=no
1093 fi
1094 AC_SUBST(VERSIONING)
1096 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1097 echo "\
1098 *** WARNING: You should not compile GNU libc without versioning. Not using
1099 *** versioning will introduce incompatibilities so that old binaries
1100 *** will not run anymore.
1101 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1102 fi
1103 if test $elf = yes; then
1104 AC_CACHE_CHECK(for .previous assembler directive,
1105 libc_cv_asm_previous_directive, [dnl
1106 cat > conftest.s <<EOF
1107 .section foo_section
1108 .previous
1109 EOF
1110 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1111 libc_cv_asm_previous_directive=yes
1112 else
1113 libc_cv_asm_previous_directive=no
1114 fi
1115 rm -f conftest*])
1116 if test $libc_cv_asm_previous_directive = yes; then
1117 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1118 else
1119 AC_CACHE_CHECK(for .popsection assembler directive,
1120 libc_cv_asm_popsection_directive, [dnl
1121 cat > conftest.s <<EOF
1122 .pushsection foo_section
1123 .popsection
1124 EOF
1125 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1126 libc_cv_asm_popsection_directive=yes
1127 else
1128 libc_cv_asm_popsection_directive=no
1129 fi
1130 rm -f conftest*])
1131 if test $libc_cv_asm_popsection_directive = yes; then
1132 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1133 fi
1134 fi
1135 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1136 libc_cv_asm_protected_directive, [dnl
1137 cat > conftest.s <<EOF
1138 .protected foo
1139 foo:
1140 .hidden bar
1141 bar:
1142 EOF
1143 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1144 libc_cv_asm_protected_directive=yes
1145 else
1146 libc_cv_asm_protected_directive=no
1147 fi
1148 rm -f conftest*])
1149 AC_SUBST(libc_cv_asm_protected_directive)
1150 AC_DEFINE(HAVE_PROTECTED)
1151 AC_DEFINE(HAVE_HIDDEN)
1153 if test $libc_cv_asm_protected_directive = yes; then
1154 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1155 libc_cv_visibility_attribute,
1156 [cat > conftest.c <<EOF
1157 int foo __attribute__ ((visibility ("hidden"))) = 1;
1158 int bar __attribute__ ((visibility ("protected"))) = 1;
1159 EOF
1160 libc_cv_visibility_attribute=no
1161 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1162 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1163 if grep '\.protected.*bar' conftest.s >/dev/null; then
1164 libc_cv_visibility_attribute=yes
1165 fi
1166 fi
1167 fi
1168 rm -f conftest.[cs]
1169 ])
1170 if test $libc_cv_visibility_attribute = yes; then
1171 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1172 fi
1173 fi
1175 if test $libc_cv_visibility_attribute = yes; then
1176 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1177 libc_cv_broken_visibility_attribute,
1178 [cat > conftest.c <<EOF
1179 int foo (int x);
1180 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1181 int bar (int x) { return x; }
1182 EOF
1183 libc_cv_broken_visibility_attribute=yes
1184 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
1185 changequote(,)dnl
1186 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1187 changequote([,])dnl
1188 libc_cv_broken_visibility_attribute=no
1189 fi
1190 fi
1191 rm -f conftest.c conftest.s
1192 ])
1193 if test $libc_cv_broken_visibility_attribute = yes; then
1194 AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
1195 fi
1196 fi
1198 AC_CACHE_CHECK(for broken __attribute__((alias())),
1199 libc_cv_broken_alias_attribute,
1200 [cat > conftest.c <<EOF
1201 extern int foo (int x) __asm ("xyzzy");
1202 int bar (int x) { return x; }
1203 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1204 extern int dfoo;
1205 extern __typeof (dfoo) dfoo __asm ("abccb");
1206 int dfoo = 1;
1207 EOF
1208 libc_cv_broken_alias_attribute=yes
1209 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1210 if grep 'xyzzy' conftest.s >/dev/null &&
1211 grep 'abccb' conftest.s >/dev/null; then
1212 libc_cv_broken_alias_attribute=no
1213 fi
1214 fi
1215 rm -f conftest.c conftest.s
1216 ])
1217 if test $libc_cv_broken_alias_attribute = yes; then
1218 AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
1219 fi
1221 if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
1222 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1223 libc_cv_have_sdata_section,
1224 [echo "int i;" > conftest.c
1225 libc_cv_have_sdata_section=no
1226 if ${CC-cc} $LDFLAGS -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1227 | grep '\.sdata' >/dev/null; then
1228 libc_cv_have_sdata_section=yes
1229 fi
1230 rm -f conftest.c conftest.so
1231 ])
1232 if test $libc_cv_have_sdata_section = yes; then
1233 AC_DEFINE(HAVE_SDATA_SECTION)
1234 fi
1235 fi
1237 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1238 libc_cv_initfinit_array, [dnl
1239 cat > conftest.c <<EOF
1240 int _start (void) { return 0; }
1241 int __start (void) { return 0; }
1242 int foo (void) { return 1; }
1243 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1244 EOF
1245 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1246 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1247 then
1248 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1249 libc_cv_initfinit_array=yes
1250 else
1251 libc_cv_initfinit_array=no
1252 fi
1253 else
1254 libc_cv_initfinit_array=no
1255 fi
1256 rm -f conftest*])
1257 AC_SUBST(libc_cv_initfinit_array)
1258 if test $libc_cv_initfinit_array = yes; then
1259 AC_DEFINE(HAVE_INITFINI_ARRAY)
1260 fi
1262 AC_CACHE_CHECK(for libunwind-support in compiler,
1263 libc_cv_cc_with_libunwind, [dnl
1264 AC_TRY_LINK([#include <libunwind.h>], [
1265 unw_context_t uc;
1266 unw_cursor_t c;
1267 unw_getcontext (&uc);
1268 unw_init_local (&c, &uc)],
1269 libc_cv_cc_with_libunwind=yes, libc_cv_cc_with_libunwind=no)])
1270 AC_SUBST(libc_cv_cc_with_libunwind)
1271 if test $libc_cv_cc_with_libunwind = yes; then
1272 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1273 fi
1275 AC_CACHE_CHECK(for -z nodelete option,
1276 libc_cv_z_nodelete, [dnl
1277 cat > conftest.c <<EOF
1278 int _start (void) { return 42; }
1279 EOF
1280 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1281 -shared -o conftest.so conftest.c
1282 -nostartfiles -nostdlib
1283 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1284 then
1285 libc_cv_z_nodelete=yes
1286 else
1287 libc_cv_z_nodelete=no
1288 fi
1289 rm -f conftest*])
1290 AC_SUBST(libc_cv_z_nodelete)
1292 AC_CACHE_CHECK(for -z nodlopen option,
1293 libc_cv_z_nodlopen, [dnl
1294 cat > conftest.c <<EOF
1295 int _start (void) { return 42; }
1296 EOF
1297 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1298 -shared -o conftest.so conftest.c
1299 -nostartfiles -nostdlib
1300 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1301 then
1302 libc_cv_z_nodlopen=yes
1303 else
1304 libc_cv_z_nodlopen=no
1305 fi
1306 rm -f conftest*])
1307 AC_SUBST(libc_cv_z_nodlopen)
1309 AC_CACHE_CHECK(for -z initfirst option,
1310 libc_cv_z_initfirst, [dnl
1311 cat > conftest.c <<EOF
1312 int _start (void) { return 42; }
1313 EOF
1314 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1315 -shared -o conftest.so conftest.c
1316 -nostartfiles -nostdlib
1317 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1318 then
1319 libc_cv_z_initfirst=yes
1320 else
1321 libc_cv_z_initfirst=no
1322 fi
1323 rm -f conftest*])
1324 AC_SUBST(libc_cv_z_initfirst)
1326 AC_CACHE_CHECK(for -z relro option,
1327 libc_cv_z_relro, [dnl
1328 libc_cv_z_relro=no
1329 if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
1330 then
1331 if AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep DATA_SEGMENT_RELRO_END 1>&AS_MESSAGE_LOG_FD])
1332 then
1333 libc_cv_z_relro=yes
1334 fi
1335 fi])
1336 AC_SUBST(libc_cv_z_relro)
1337 if test $libc_cv_z_relro = yes; then
1338 AC_DEFINE(HAVE_Z_RELRO)
1339 fi
1341 AC_CACHE_CHECK(for -Bgroup option,
1342 libc_cv_Bgroup, [dnl
1343 cat > conftest.c <<EOF
1344 int _start (void) { return 42; }
1345 EOF
1346 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1347 -shared -o conftest.so conftest.c
1348 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1349 then
1350 libc_cv_Bgroup=yes
1351 else
1352 libc_cv_Bgroup=no
1353 fi
1354 rm -f conftest*])
1355 AC_SUBST(libc_cv_Bgroup)
1357 AC_CACHE_CHECK(for libgcc_s suffix,
1358 libc_cv_libgcc_s_suffix, [dnl
1359 cat > conftest.c <<EOF
1360 int main (void) { return 0; }
1361 EOF
1362 changequote(,)dnl
1363 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1364 -shared -shared-libgcc -o conftest.so \
1365 conftest.c -v 2>&1 >/dev/null \
1366 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1367 changequote([,])dnl
1368 rm -f conftest*])
1369 AC_SUBST(libc_cv_libgcc_s_suffix)
1371 AC_CACHE_CHECK(for --as-needed option,
1372 libc_cv_as_needed, [dnl
1373 cat > conftest.c <<EOF
1374 int main (void) { return 0; }
1375 EOF
1376 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1377 -shared -o conftest.so conftest.c
1378 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1379 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1380 then
1381 libc_cv_as_needed=yes
1382 else
1383 libc_cv_as_needed=no
1384 fi
1385 rm -f conftest*])
1386 AC_SUBST(libc_cv_as_needed)
1388 ASFLAGS_config=
1389 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1390 libc_cv_as_noexecstack, [dnl
1391 cat > conftest.c <<EOF
1392 void foo (void) { }
1393 EOF
1394 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1395 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1396 && grep -q .note.GNU-stack conftest.s \
1397 && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wa,--noexecstack
1398 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1399 then
1400 libc_cv_as_noexecstack=yes
1401 else
1402 libc_cv_as_noexecstack=no
1403 fi
1404 rm -f conftest*])
1405 if test $libc_cv_as_noexecstack = yes; then
1406 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1407 fi
1408 AC_SUBST(ASFLAGS_config)
1410 AC_CACHE_CHECK(for -z combreloc,
1411 libc_cv_z_combreloc, [dnl
1412 cat > conftest.c <<EOF
1413 extern int bar (int);
1414 extern int mumble;
1415 int foo (void) { return bar (mumble); }
1416 EOF
1417 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1418 -shared -o conftest.so conftest.c
1419 -nostdlib -nostartfiles
1420 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1421 then
1422 dnl The following test is a bit weak. We must use a tool which can test
1423 dnl cross-platform since the gcc used can be a cross compiler. Without
1424 dnl introducing new options this is not easily doable. Instead use a tool
1425 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1426 dnl look for a section named .rel.dyn.
1427 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1428 libc_cv_z_combreloc=yes
1429 else
1430 libc_cv_z_combreloc=no
1431 fi
1432 else
1433 libc_cv_z_combreloc=no
1434 fi
1435 rm -f conftest*])
1436 if test "$libc_cv_z_combreloc" = yes; then
1437 AC_DEFINE(HAVE_Z_COMBRELOC)
1438 fi
1439 AC_SUBST(libc_cv_z_combreloc)
1441 AC_CACHE_CHECK(for -z execstack,
1442 libc_cv_z_execstack, [dnl
1443 cat > conftest.c <<EOF
1444 int _start (void) { return 42; }
1445 EOF
1446 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1447 -shared -o conftest.so conftest.c
1448 -Wl,-z,execstack -nostdlib
1449 1>&AS_MESSAGE_LOG_FD])
1450 then
1451 libc_cv_z_execstack=yes
1452 else
1453 libc_cv_z_execstack=no
1454 fi
1455 rm -f conftest*])
1456 AC_SUBST(libc_cv_z_execstack)
1458 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1459 cat > conftest.c <<EOF
1460 int foo;
1461 main () { return 0;}
1462 EOF
1463 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1464 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1465 then
1466 libc_cv_fpie=yes
1467 else
1468 libc_cv_fpie=no
1469 fi
1470 rm -f conftest*])
1472 AC_SUBST(libc_cv_fpie)
1473 fi
1475 AC_CACHE_CHECK(for -fno-unit-at-a-time, libc_cv_fno_unit_at_a_time, [dnl
1476 cat > conftest.c <<EOF
1477 int foo;
1478 EOF
1479 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-unit-at-a-time
1480 conftest.c 1>&AS_MESSAGE_LOG_FD])
1481 then
1482 libc_cv_fno_unit_at_a_time=yes
1483 else
1484 libc_cv_fno_unit_at_a_time=no
1485 fi
1486 rm -f conftest*])
1487 if test $libc_cv_fno_unit_at_a_time = yes; then
1488 fno_unit_at_a_time=-fno-unit-at-a-time
1489 fi
1490 AC_SUBST(fno_unit_at_a_time)
1492 if test $elf != yes; then
1493 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1494 [AC_TRY_COMPILE(, [asm (".section .init");
1495 asm (".section .fini");
1496 asm ("${libc_cv_dot_text}");],
1497 libc_cv_have_initfini=yes,
1498 libc_cv_have_initfini=no)])
1499 AC_SUBST(libc_cv_have_initfini)dnl
1500 if test $libc_cv_have_initfini = yes; then
1501 AC_DEFINE(HAVE_INITFINI)
1502 fi
1503 fi
1505 if test $elf = yes -a $gnu_ld = yes; then
1506 AC_CACHE_CHECK(whether cc puts quotes around section names,
1507 libc_cv_have_section_quotes,
1508 [cat > conftest.c <<EOF
1509 static const int foo
1510 __attribute__ ((section ("bar"))) = 1;
1511 EOF
1512 if ${CC-cc} -S conftest.c -o conftest.s; then
1513 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1514 libc_cv_have_section_quotes=yes
1515 else
1516 libc_cv_have_section_quotes=no
1517 fi
1518 else
1519 libc_cv_have_section_quotes=unknown
1520 fi
1521 rm -f conftest.[cs]
1522 ])
1523 if test $libc_cv_have_section_quotes = yes; then
1524 AC_DEFINE(HAVE_SECTION_QUOTES)
1525 fi
1526 fi
1528 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1529 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1530 [cat > conftest.$ac_ext <<EOF
1531 dnl This sometimes fails to find confdefs.h, for some reason.
1532 dnl [#]line $LINENO "[$]0"
1533 [#]line $LINENO "configure"
1534 #include "confdefs.h"
1535 void underscore_test(void) {
1536 return; }
1537 EOF
1538 if AC_TRY_EVAL(ac_compile); then
1539 if grep _underscore_test conftest* >/dev/null; then
1540 ifelse([$1], , :, [rm -f conftest*
1541 $1])
1542 else
1543 ifelse([$2], , , [rm -f conftest*
1544 $2])
1545 fi
1546 else
1547 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1548 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1549 ifelse([$2], , , [rm -f conftest*
1550 $2])
1551 fi
1552 rm -f conftest*])
1554 if test $elf = yes; then
1555 libc_cv_asm_underscores=no
1556 else
1557 if test $ac_cv_prog_cc_works = yes; then
1558 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1559 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1560 libc_cv_asm_underscores=yes,
1561 libc_cv_asm_underscores=no)])
1562 else
1563 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1564 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1565 libc_cv_asm_underscores=no)])
1566 fi
1567 fi
1568 if test $libc_cv_asm_underscores = no; then
1569 AC_DEFINE(NO_UNDERSCORES)
1570 fi
1572 if test $elf = yes; then
1573 libc_cv_weak_symbols=yes
1574 fi
1576 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1577 [dnl
1578 cat > conftest.s <<EOF
1579 ${libc_cv_dot_text}
1580 ${libc_cv_asm_global_directive} foo
1581 foo:
1582 .weak foo
1583 .weak bar; bar = foo
1584 EOF
1585 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1586 libc_cv_asm_weak_directive=yes
1587 else
1588 libc_cv_asm_weak_directive=no
1589 fi
1590 rm -f conftest*])
1592 if test $libc_cv_asm_weak_directive = no; then
1593 AC_CACHE_CHECK(for assembler .weakext directive,
1594 libc_cv_asm_weakext_directive,
1595 [dnl
1596 cat > conftest.s <<EOF
1597 ${libc_cv_dot_text}
1598 ${libc_cv_asm_global_directive} foo
1599 foo:
1600 .weakext bar foo
1601 .weakext baz
1602 ${libc_cv_asm_global_directive} baz
1603 baz:
1604 EOF
1605 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1606 libc_cv_asm_weakext_directive=yes
1607 else
1608 libc_cv_asm_weakext_directive=no
1609 fi
1610 rm -f conftest*])
1612 fi # no .weak
1614 if test $libc_cv_asm_weak_directive = yes; then
1615 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1616 elif test $libc_cv_asm_weakext_directive = yes; then
1617 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1618 fi
1620 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1621 cat > conftest.s <<EOF
1622 .text
1623 .type func,@function
1624 func:
1625 .cfi_startproc
1626 .cfi_remember_state
1627 .cfi_rel_offset 1, 0
1628 .cfi_endproc
1629 EOF
1630 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1631 libc_cv_asm_cfi_directives=yes
1632 else
1633 libc_cv_asm_cfi_directives=no
1634 fi
1635 rm -f conftest*])
1636 if test $libc_cv_asm_cfi_directives = yes; then
1637 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1638 fi
1640 AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
1641 libc_cv_cpp_asm_debuginfo, [dnl
1642 cat > conftest.S <<EOF
1643 #include "confdefs.h"
1645 /* comment on
1646 two lines */
1647 ${libc_cv_dot_text}
1648 ${libc_cv_asm_global_directive} foo
1649 foo:
1650 /* Unfortunately this test only works for a real instruction,
1651 not for any of the machine-independent pseudo-ops.
1652 So we just have to assume everybody has a "nop". */
1653 nop
1654 /* comment */
1655 nop
1656 /* comment */
1657 nop
1658 EOF
1659 if AC_TRY_COMMAND([${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) && {
1660 ac_pattern='conftest\.S'
1661 AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
1662 grep $ac_pattern 1>&AS_MESSAGE_LOG_FD])
1663 }; then
1664 libc_cv_cpp_asm_debuginfo=yes
1665 else
1666 libc_cv_cpp_asm_debuginfo=no
1667 fi
1668 rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
1669 if test $libc_cv_cpp_asm_debuginfo = yes; then
1670 AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
1671 fi
1673 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1674 cat > conftest.c <<\EOF
1675 _start () {}
1676 int __eh_pc;
1677 __throw () {}
1678 EOF
1679 dnl No \ in command here because it ends up inside ''.
1680 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1681 -nostdlib -nostartfiles -Wl,--no-whole-archive
1682 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1683 libc_cv_ld_no_whole_archive=yes
1684 else
1685 libc_cv_ld_no_whole_archive=no
1686 fi
1687 rm -f conftest*])
1688 if test $libc_cv_ld_no_whole_archive = yes; then
1689 no_whole_archive=-Wl,--no-whole-archive
1690 fi
1691 AC_SUBST(no_whole_archive)dnl
1693 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1694 cat > conftest.c <<\EOF
1695 _start () {}
1696 int __eh_pc;
1697 __throw () {}
1698 EOF
1699 dnl No \ in command here because it ends up inside ''.
1700 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1701 -nostdlib -nostartfiles -fexceptions
1702 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1703 libc_cv_gcc_exceptions=yes
1704 else
1705 libc_cv_gcc_exceptions=no
1706 fi
1707 rm -f conftest*])
1708 if test $libc_cv_gcc_exceptions = yes; then
1709 exceptions=-fexceptions
1710 fi
1711 AC_SUBST(exceptions)dnl
1713 if test "$host_cpu" = powerpc ; then
1714 # Check for a bug present in at least versions 2.8.x of GCC
1715 # and versions 1.0.x of EGCS.
1716 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1717 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1718 libc_cv_c_asmcr0_bug='no',
1719 libc_cv_c_asmcr0_bug='yes')])
1720 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1721 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1722 fi
1723 fi
1725 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1726 [cat > conftest.c <<EOF
1727 #line $LINENO "configure"
1728 static char *__EH_FRAME_BEGIN__;
1729 _start ()
1730 {
1731 #ifdef CHECK__register_frame
1732 __register_frame (__EH_FRAME_BEGIN__);
1733 __deregister_frame (__EH_FRAME_BEGIN__);
1734 #endif
1735 #ifdef CHECK__register_frame_info
1736 __register_frame_info (__EH_FRAME_BEGIN__);
1737 __deregister_frame_info (__EH_FRAME_BEGIN__);
1738 #endif
1739 }
1740 int __eh_pc;
1741 __throw () {}
1742 /* FIXME: this is fragile. */
1743 malloc () {}
1744 strcmp () {}
1745 strlen () {}
1746 memcpy () {}
1747 memset () {}
1748 free () {}
1749 abort () {}
1750 __bzero () {}
1751 dl_iterate_phdr () {}
1752 EOF
1753 libc_unwind_check="${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame_info \
1754 $LDFLAGS \
1755 -nostdlib -nostartfiles -o conftest conftest.c \
1756 -lgcc"
1757 # Some platforms' specs put -lgcc first. The second one doesn't hurt.
1758 if AC_TRY_COMMAND([$libc_unwind_check >&AS_MESSAGE_LOG_FD]) ||
1759 AC_TRY_COMMAND([$libc_unwind_check -lgcc_eh -lgcc >&AS_MESSAGE_LOG_FD])
1760 then
1761 if $libc_unwind_check -v 2>&1 >/dev/null \
1762 | grep -- --eh-frame-hdr 2>&1 >/dev/null; then
1763 libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
1764 else
1765 libc_cv_gcc_dwarf2_unwind_info=static
1766 fi
1767 else
1768 libc_cv_gcc_dwarf2_unwind_info=no
1769 fi
1770 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1771 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame
1772 $LDFLAGS -nostdlib -nostartfiles
1773 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1774 libc_cv_gcc_dwarf2_unwind_info=yes
1775 else
1776 libc_cv_gcc_dwarf2_unwind_info=no
1777 fi
1778 fi
1779 rm -f conftest*])
1780 case $libc_cv_gcc_dwarf2_unwind_info in
1781 yes)
1782 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1783 ;;
1784 static)
1785 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1786 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1787 ;;
1788 esac
1790 dnl Check whether compiler understands __builtin_expect.
1791 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1792 [cat > conftest.c <<EOF
1793 #line $LINENO "configure"
1794 int foo (int a)
1795 {
1796 a = __builtin_expect (a, 10);
1797 return a == 10 ? 0 : 1;
1798 }
1799 EOF
1800 dnl No \ in command here because it ends up inside ''.
1801 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1802 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1803 libc_cv_gcc_builtin_expect=yes
1804 else
1805 libc_cv_gcc_builtin_expect=no
1806 fi
1807 rm -f conftest*])
1808 if test "$libc_cv_gcc_builtin_expect" = yes; then
1809 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1810 fi
1812 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1813 cat > conftest.c <<\EOF
1814 void zero (void *x)
1815 {
1816 __builtin_memset (x, 0, 1000);
1817 }
1818 EOF
1819 dnl
1820 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1821 then
1822 libc_cv_gcc_builtin_memset=no
1823 else
1824 libc_cv_gcc_builtin_memset=yes
1825 fi
1826 rm -f conftest* ])
1827 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1828 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1829 fi
1831 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1832 cat > conftest.c <<\EOF
1833 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1834 char *foo (const char *a, const char *b)
1835 {
1836 return __builtin_strstr (a, b);
1837 }
1838 EOF
1839 dnl
1840 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1841 then
1842 libc_cv_gcc_builtin_redirection=yes
1843 else
1844 libc_cv_gcc_builtin_redirection=no
1845 fi
1846 rm -f conftest* ])
1847 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
1848 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
1849 fi
1851 dnl Check whether the compiler supports subtraction of local labels.
1852 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1853 [cat > conftest.c <<EOF
1854 changequote(,)dnl
1855 #line $LINENO "configure"
1856 int foo (int a)
1857 {
1858 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1859 void *p = &&l1 + ar[a];
1860 goto *p;
1861 l1:
1862 return 1;
1863 l2:
1864 return 2;
1865 }
1866 changequote([,])dnl
1867 EOF
1868 dnl No \ in command here because it ends up inside ''.
1869 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1870 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1871 libc_cv_gcc_subtract_local_labels=yes
1872 else
1873 libc_cv_gcc_subtract_local_labels=no
1874 fi
1875 rm -f conftest*])
1876 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1877 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1878 fi
1880 dnl Check whether the compiler supports the __thread keyword.
1881 if test "x$use__thread" != xno; then
1882 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1883 [cat > conftest.c <<\EOF
1884 __thread int a = 42;
1885 EOF
1886 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1887 libc_cv_gcc___thread=yes
1888 else
1889 libc_cv_gcc___thread=no
1890 fi
1891 rm -f conftest*])
1892 if test "$libc_cv_gcc___thread" = yes; then
1893 AC_DEFINE(HAVE___THREAD)
1894 fi
1895 else
1896 libc_cv_gcc___thread=no
1897 fi
1899 if test "$libc_cv_gcc___thread" = yes; then
1900 dnl Check whether the compiler supports the tls_model attribute.
1901 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1902 cat > conftest.c <<\EOF
1903 extern __thread int a __attribute__((tls_model ("initial-exec")));
1904 EOF
1905 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1906 libc_cv_gcc_tls_model_attr=yes
1907 else
1908 libc_cv_gcc_tls_model_attr=no
1909 fi
1910 rm -f conftest*])
1911 if test "$libc_cv_gcc_tls_model_attr" = yes; then
1912 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
1913 fi
1914 fi
1916 dnl Check whether we have the gd library available.
1917 AC_MSG_CHECKING(for libgd)
1918 if test "$with_gd" != "no"; then
1919 old_CFLAGS="$CFLAGS"
1920 CFLAGS="$CFLAGS $libgd_include"
1921 old_LDFLAGS="$LDFLAGS"
1922 LDFLAGS="$LDFLAGS $libgd_ldflags"
1923 old_LIBS="$LIBS"
1924 LIBS="$LIBS -lgd -lpng -lz -lm"
1925 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1926 CFLAGS="$old_CFLAGS"
1927 LDFLAGS="$old_LDFLAGS"
1928 LIBS="$old_LIBS"
1929 else
1930 LIBGD=no
1931 fi
1932 AC_MSG_RESULT($LIBGD)
1933 AC_SUBST(LIBGD)
1935 # SELinux detection
1936 if test x$with_selinux = xno ; then
1937 have_selinux=no;
1938 else
1939 # See if we have the SELinux library
1940 AC_CHECK_LIB(selinux, is_selinux_enabled,
1941 have_selinux=yes, have_selinux=no)
1942 # See if we have the SELinux header with the NSCD permissions in it.
1943 if test x$have_selinux = xyes ; then
1944 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
1945 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
1946 [#ifdef NSCD__SHMEMHOST
1947 return 0;
1948 #else
1949 #error NSCD__SHMEMHOST not defined
1950 #endif],
1951 have_selinux=yes, have_selinux=no)
1952 AC_MSG_RESULT($have_selinux)
1953 fi
1955 if test x$with_selinux = xyes ; then
1956 if test x$have_selinux = xno ; then
1957 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
1958 fi
1959 fi
1960 fi
1961 # Check if we're building with SELinux support.
1962 if test "x$have_selinux" = xyes; then
1963 AC_DEFINE(HAVE_SELINUX,1,[SELinux support])
1964 fi
1965 AC_SUBST(have_selinux)
1967 dnl check for the size of 'long double'.
1968 AC_CHECK_SIZEOF(long double, 0)
1969 sizeof_long_double=$ac_cv_sizeof_long_double
1970 AC_SUBST(sizeof_long_double)
1972 ### End of automated tests.
1973 ### Now run sysdeps configure fragments.
1975 # They also can set these variables.
1976 use_ldconfig=no
1977 ldd_rewrite_script=no
1978 libc_cv_sysconfdir=$sysconfdir
1979 libc_cv_gcc_unwind_find_fde=no
1980 libc_cv_idn=no
1982 # Iterate over all the sysdep directories we will use, running their
1983 # configure fragments, and looking for a uname implementation.
1984 uname=
1985 for dir in $sysnames; do
1986 case $dir in
1987 /*) dest=$dir ;;
1988 *) dest=$srcdir/$dir ;;
1989 esac
1990 if test -r $dest/configure; then
1991 AC_MSG_RESULT(running configure fragment for $dir)
1992 . $dest/configure
1993 fi
1994 [
1995 if test -z "$uname"; then
1996 if test -r $dest/uname.c ||
1997 test -r $dest/uname.S ||
1998 { test -r $dest/syscalls.list &&
1999 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
2000 uname=$dir
2001 fi
2002 fi
2003 ]dnl
2004 done
2006 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2007 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2008 fi
2009 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2011 # If we will use the generic uname implementation, we must figure out what
2012 # it will say by examining the system, and write the results in config-name.h.
2013 if test "$uname" = "sysdeps/generic"; then
2015 changequote(,)dnl
2016 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
2017 changequote([,])dnl
2018 if test $uname_sysname != $config_os; then
2019 config_release=`echo $config_os | sed s/$uname_sysname//`
2020 fi
2021 dnl
2022 AC_DEFUN(LIBC_KERNEL_ID, [dnl
2023 if test -r /vmunix; then
2024 kernel_id=`strings /vmunix | grep UNIX`
2025 elif test -r /dynix; then
2026 kernel_id=`strings /dynix | grep DYNIX`
2027 else
2028 kernel_id=
2029 fi
2030 ])dnl
2032 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
2033 LIBC_KERNEL_ID
2034 changequote(,)dnl
2035 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
2036 changequote([,])dnl
2037 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
2038 != x$config_release; then
2039 # The configuration release is a substring of the kernel release.
2040 libc_cv_uname_release=$kernel_release
2041 elif test x$config_release != x; then
2042 libc_cv_uname_release=$config_release
2043 elif test x$kernel_release != x; then
2044 libc_cv_uname_release=$kernel_release
2045 else
2046 libc_cv_uname_release=unknown
2047 fi])
2048 uname_release="$libc_cv_uname_release"
2050 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
2051 LIBC_KERNEL_ID
2052 changequote(,)dnl
2053 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
2054 changequote([,])dnl
2055 if test -n "$kernel_version"; then
2056 libc_cv_uname_version="$kernel_version"
2057 else
2058 libc_cv_uname_version=unknown
2059 fi])
2060 uname_version="$libc_cv_uname_version"
2062 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
2063 config_uname=config-name.h:config-name.in
2064 else
2065 # For non-generic uname, we don't need to create config-name.h at all.
2066 config_uname=
2067 fi
2069 dnl This is tested by existing code and it's simpler to avoid changing it.
2070 AC_DEFINE(USE_IN_LIBIO)
2072 # Test for old glibc 2.0.x headers so that they can be removed properly
2073 # Search only in includedir.
2074 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2075 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2076 then
2077 old_glibc_headers=yes
2078 else
2079 old_glibc_headers=no
2080 fi
2081 AC_MSG_RESULT($old_glibc_headers)
2082 if test ${old_glibc_headers} = yes; then
2083 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2084 AC_MSG_WARN(*** be removed.)
2085 fi
2086 AC_SUBST(old_glibc_headers)
2088 AC_SUBST(libc_cv_slibdir)
2089 AC_SUBST(libc_cv_localedir)
2090 AC_SUBST(libc_cv_sysconfdir)
2091 AC_SUBST(libc_cv_rootsbindir)
2092 AC_SUBST(libc_cv_forced_unwind)
2094 AC_SUBST(use_ldconfig)
2095 AC_SUBST(ldd_rewrite_script)
2097 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
2098 if test $gnu_ld = yes; then
2099 AC_DEFINE(HAVE_GNU_LD)
2100 fi
2101 if test $gnu_as = yes; then
2102 AC_DEFINE(HAVE_GNU_AS)
2103 fi
2104 if test $elf = yes; then
2105 AC_DEFINE(HAVE_ELF)
2106 fi
2107 if test $xcoff = yes; then
2108 AC_DEFINE(HAVE_XCOFF)
2109 fi
2111 AC_SUBST(static)
2112 AC_SUBST(shared)
2113 if test $shared = default; then
2114 if test $gnu_ld = yes; then
2115 shared=$elf
2116 else
2117 # For now we do not assume shared libs are available. In future more
2118 # tests might become available.
2119 shared=no
2120 fi
2121 fi
2123 if test x"$libc_cv_idn" = xyes; then
2124 AC_DEFINE(HAVE_LIBIDN)
2125 fi
2127 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
2128 [pic_default=yes
2129 cat > conftest.c <<EOF
2130 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2131 # error PIC is default.
2132 #endif
2133 EOF
2134 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2135 pic_default=no
2136 fi
2137 rm -f conftest.*])
2138 AC_SUBST(pic_default)
2140 AC_SUBST(profile)
2141 AC_SUBST(omitfp)
2142 AC_SUBST(bounded)
2143 AC_SUBST(static_nss)
2144 AC_SUBST(nopic_initfini)
2146 AC_SUBST(DEFINES)
2148 case "$add_ons" in
2149 *door*) linux_doors=yes ;;
2150 *) linux_doors=no ;;
2151 esac
2152 AC_SUBST(linux_doors)
2154 dnl See sysdeps/mach/configure.in for this variable.
2155 AC_SUBST(mach_interface_list)
2157 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2158 config_makefile=
2159 else
2160 config_makefile=Makefile
2161 fi
2163 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2164 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2165 AC_SUBST(VERSION)
2166 AC_SUBST(RELEASE)
2168 AC_CONFIG_FILES([config.make ${config_makefile} ${config_uname}])
2169 AC_CONFIG_COMMANDS([default],[[
2170 case $CONFIG_FILES in *config.make*)
2171 echo "$config_vars" >> config.make;;
2172 esac
2173 test -d bits || mkdir bits]],[[config_vars='$config_vars']])
2174 AC_OUTPUT