| blob | c415f37de7615171851bbe79aa08986597df9609 |
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([xcoff],
85 AC_HELP_STRING([--with-xcoff],
86 [if using the XCOFF object format]),
87 [xcoff=$withval],
88 [xcoff=no])
89 AC_ARG_WITH([cvs],
90 AC_HELP_STRING([--without-cvs],
91 [if CVS should not be used]),
92 [with_cvs=$withval],
93 [with_cvs=yes])
94 if test "$with_cvs" = yes; then
95 if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
96 then
97 with_cvs=no
98 fi
99 fi
100 AC_SUBST(with_cvs)
102 AC_ARG_WITH([headers],
103 AC_HELP_STRING([--with-headers=PATH],
104 [location of system headers to use
105 (for example /usr/src/linux/include)
106 @<:@default=compiler default@:>@]),
107 [sysheaders=$withval],
108 [sysheaders=''])
110 AC_ARG_ENABLE([sanity-checks],
111 AC_HELP_STRING([--disable-sanity-checks],
112 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
113 [enable_sanity=$enableval],
114 [enable_sanity=yes])
116 AC_SUBST(enable_check_abi)
117 AC_ARG_ENABLE([check-abi],
118 AC_HELP_STRING([--enable-check-abi],
119 [do "make check-abi" in "make check" (no/warn/yes)
120 @<:@default=no@:>@]),
121 [enable_check_abi=$enableval],
122 [enable_check_abi=no])
124 dnl Arguments to enable or disable building the static, shared, profiled,
125 dnl and -fomit-frame-pointer libraries.
126 dnl I've disabled this for now since we cannot build glibc without static
127 dnl libraries built in the moment.
128 dnl AC_ARG_ENABLE([static],
129 dnl AC_HELP_STRING([--enable-static],
130 dnl [build static library @<:@default=yes@:>@]),
131 dnl [static=$enableval],
132 dnl [static=yes])
133 static=yes
134 AC_ARG_ENABLE([shared],
135 AC_HELP_STRING([--enable-shared],
136 [build shared library @<:@default=yes if GNU ld & ELF@:>@]),
137 [shared=$enableval],
138 [shared=default])
139 AC_ARG_ENABLE([profile],
140 AC_HELP_STRING([--enable-profile],
141 [build profiled library @<:@default=yes@:>@]),
142 [profile=$enableval],
143 [profile=yes])
144 AC_ARG_ENABLE([omitfp],
145 AC_HELP_STRING([--enable-omitfp],
146 [build undebuggable optimized library @<:@default=no@:>@]),
147 [omitfp=$enableval],
148 [omitfp=no])
149 AC_ARG_ENABLE([bounded],
150 AC_HELP_STRING([--enable-bounded],
151 [build with runtime bounds checking @<:@default=no@:>@]),
152 [bounded=$enableval],
153 [bounded=no])
154 AC_ARG_ENABLE([versioning],
155 AC_HELP_STRING([--disable-versioning],
156 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
157 [enable_versioning=$enableval],
158 [enable_versioning=yes])
160 AC_ARG_ENABLE([oldest-abi],
161 AC_HELP_STRING([--enable-oldest-abi=ABI],
162 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
163 [oldest_abi=$enableval],
164 [oldest_abi=no])
165 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
166 oldest_abi=default
167 else
168 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
169 fi
170 AC_SUBST(oldest_abi)
172 dnl Generic infrastructure for drop-in additions to libc.
173 AC_ARG_ENABLE([add-ons],
174 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
175 [configure and build add-ons in DIR1,DIR2,... search for add-ons if no parameter given]),
176 [case "$enableval" in
177 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
178 test "$add_ons" = "*" && add_ons= ;;
179 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
180 esac],
181 [add_ons=])
183 dnl Let the user avoid using TLS. Don't know why but...
184 dnl XXX For now we disable support by default.
185 AC_ARG_WITH([tls],
186 AC_HELP_STRING([--with-tls],
187 [enable support for TLS]),
188 [usetls=$withval],
189 [usetls=no])
191 AC_ARG_WITH([__thread],
192 AC_HELP_STRING([--without-__thread],
193 [do not use TLS features even when supporting them]),
194 [use__thread=$withval],
195 [use__thread=yes])
197 AC_ARG_ENABLE([hidden-plt],
198 AC_HELP_STRING([--disable-hidden-plt],
199 [do not hide internal function calls to avoid PLT]),
200 [hidden=$enableval],
201 [hidden=yes])
202 if test "x$hidden" = xno; then
203 AC_DEFINE(NO_HIDDEN)
204 fi
206 AC_CONFIG_SUBDIRS([ ])dnl Bonehead new Autoconf whines if we do it cleanly.
207 add_ons_pfx=
208 if test x"$add_ons" != x; then
209 for f in $add_ons; do
210 # Some sanity checks
211 if test "$f" = "crypt"; then
212 AC_MSG_ERROR([
213 *** It seems that you're using an old \`crypt' add-on. crypt is now
214 *** part of glibc and using the old add-on will not work with this
215 *** release. Start again with fresh sources and without the old
216 *** \`crypt' add-on.])
217 fi
218 if test "$f" = "localedata"; then
219 AC_MSG_ERROR([
220 *** It seems that you're using an old \`localedata' add-on. localedata
221 *** is now part of glibc and using the old add-on will not work with
222 *** this release. Start again with fresh sources and without the old
223 *** \`localedata' add-on.])
224 fi
225 # Test whether such a subdir really exists.
226 if test -d $srcdir/$f; then
227 add_ons_pfx="$add_ons_pfx $f/"
228 dnl This variable is what AC_CONFIG_SUBDIRS is supposed to set,
229 dnl but the new Autoconf maintainers don't care about compatibility
230 dnl so we cannot use it normally any more without complaints.
231 subdirs="$subdirs $f"
232 else
233 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
234 fi
235 done
236 fi
238 dnl On some platforms we cannot use dynamic loading. We must provide
239 dnl static NSS modules.
240 AC_ARG_ENABLE([static-nss],
241 AC_HELP_STRING([--enable-static-nss],
242 [build static NSS modules @<:@default=no@:>@]),
243 [static_nss=$enableval],
244 [static_nss=no])
245 dnl Enable static NSS also if we build no shared objects.
246 if test x"$static_nss" = xyes || test x"$shared" = xno; then
247 static_nss=yes
248 AC_DEFINE(DO_STATIC_NSS)
249 fi
251 AC_ARG_ENABLE([force-install],
252 AC_HELP_STRING([--disable-force-install],
253 [don't force installation of files from this package, even if they are older than the installed files]),
254 [force_install=$enableval],
255 [force_install=yes])
256 AC_SUBST(force_install)
258 dnl On some platforms we allow dropping compatibility with all kernel
259 dnl versions.
260 AC_ARG_ENABLE([kernel],
261 AC_HELP_STRING([--enable-kernel=VERSION],
262 [compile for compatibility with kernel not older than VERSION]),
263 [minimum_kernel=$enableval],
264 [])
265 dnl Prevent unreasonable values.
266 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
267 # Better nothing than this.
268 minimum_kernel=""
269 else
270 if test "$minimum_kernel" = current; then
271 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
272 fi
273 fi
275 dnl For the development we sometimes want gcc to issue even more warnings.
276 dnl This is not the default since many of the extra warnings are not
277 dnl appropriate.
278 AC_ARG_ENABLE([all-warnings],
279 AC_HELP_STRING([--enable-all-warnings],
280 [enable all useful warnings gcc can issue]),
281 [all_warnings=$enableval],
282 [])
283 AC_SUBST(all_warnings)
285 AC_CANONICAL_HOST
287 # The way shlib-versions is used to generate soversions.mk uses a
288 # fairly simplistic model for name recognition that can't distinguish
289 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
290 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
291 # tell. This doesn't get used much beyond that, so it's fairly safe.
292 case "$host_os" in
293 linux*)
294 ;;
295 gnu*)
296 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
297 ;;
298 esac
300 # We keep the original values in `$config_*' and never modify them, so we
301 # can write them unchanged into config.make. Everything else uses
302 # $machine, $vendor, and $os, and changes them whenever convenient.
303 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
305 # Don't allow vendor == "unknown"
306 test "$config_vendor" = unknown && config_vendor=
307 config_os="`echo $config_os | sed 's/^unknown-//'`"
309 # Some configurations imply other options.
310 case "$host_os" in
311 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
312 # These systems always use GNU tools.
313 gnu_ld=yes gnu_as=yes ;;
314 esac
315 case "$host_os" in
316 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
317 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
318 ;;
319 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
320 # These systems (almost) always use the ELF format.
321 elf=yes
322 ;;
323 aix*)
324 # These systems are always xcoff
325 xcoff=yes
326 elf=no
327 ;;
328 esac
330 machine=$config_machine
331 vendor=$config_vendor
332 os=$config_os
334 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
335 # Unify this here.
336 if test "$machine" = rs6000; then
337 machine="powerpc"
338 fi
340 # Braindead PowerPC box with absolutely no FPU.
341 case "$machine-$host_os" in
342 powerpc*-*soft)
343 with_fp=no
344 ;;
345 esac
347 ###
348 ### I put this here to prevent those annoying emails from people who cannot
349 ### read and try to compile glibc on unsupported platforms. --drepper
350 ###
351 ### By using the undocumented --enable-hacker-mode option for configure
352 ### one can skip this test to make the configuration not fail for unsupported
353 ### platforms.
354 ###
355 if test -z "$enable_hacker_mode"; then
356 case "$machine-$host_os" in
357 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
358 ;;
359 *)
360 echo "*** The GNU C library is currently not available for this platform."
361 echo "*** So far nobody cared to port it and if there is no volunteer it"
362 echo "*** might never happen. So, if you have interest to see glibc on"
363 echo "*** this platform visit"
364 echo "*** http://www.gnu.org/software/libc/porting.html"
365 echo "*** and join the group of porters"
366 exit 1
367 ;;
368 esac
369 fi
371 dnl We need to use [ and ] for other purposes for a while now.
372 changequote(,)dnl
373 # Expand the configuration machine name into a subdirectory by architecture
374 # type and particular chip.
375 case "$machine" in
376 a29k | am29000) base_machine=a29k machine=a29k ;;
377 alpha*) base_machine=alpha machine=alpha/$machine ;;
378 arm*) base_machine=arm machine=arm/arm32/$machine ;;
379 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
380 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
381 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
382 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
383 i[3456]86) base_machine=i386 machine=i386/$machine ;;
384 ia64) base_machine=ia64 machine=ia64 ;;
385 m680?0) base_machine=m68k machine=m68k/$machine ;;
386 m68k) base_machine=m68k machine=m68k/m68020 ;;
387 m88???) base_machine=m88k machine=m88k/$machine ;;
388 m88k) base_machine=m88k machine=m88k/m88100 ;;
389 mips64*) base_machine=mips64
390 case "$CC $CFLAGS $CPPFLAGS " in
391 *" -mabi=n32 "*) mips_cc_abi=n32 ;;
392 *" -mabi=64 "*|*" -mabi=n64 "*) mips_cc_abi=64 ;;
393 *" -mabi=32 "*|*" -mabi=o32 "*) mips_cc_abi=32 ;;
394 *) mips_cc_abi=default ;;
395 esac
396 case $config_os in
397 *abin32*) mips_config_abi=n32 ;;
398 *abi64*|*abin64*) mips_config_abi=64 ;;
399 *abi32*|*abio32*) mips_config_abi=32 ;;
400 *) mips_config_abi=$mips_cc_abi ;;
401 esac
402 case $mips_config_abi in
403 default) machine=mips/mips64/n32 mips_config_abi=n32 ;;
404 n32) machine=mips/mips64/n32 ;;
405 64) machine=mips/mips64/n64 ;;
406 32) machine=mips/mips32/kern64 ;;
407 esac
408 machine=$machine/$config_machine
409 if test $mips_config_abi != $mips_cc_abi; then
410 # This won't make it to config.make, but we want to
411 # set this in case configure tests depend on it.
412 CPPFLAGS="$CPPFLAGS -mabi=$mips_config_abi"
413 fi
414 ;;
415 mips*) base_machine=mips machine=mips/mips32/$machine ;;
416 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
417 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
418 s390) base_machine=s390 machine=s390/s390-32 ;;
419 s390x) base_machine=s390 machine=s390/s390-64 ;;
420 sh3*) base_machine=sh machine=sh/sh3 ;;
421 sh4*) base_machine=sh machine=sh/sh4 ;;
422 sparc | sparcv[67])
423 base_machine=sparc machine=sparc/sparc32 ;;
424 sparcv8 | supersparc | hypersparc)
425 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
426 sparcv8plus | sparcv8plusa | sparcv9)
427 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
428 sparcv8plusb | sparcv9b)
429 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
430 sparc64 | ultrasparc)
431 base_machine=sparc machine=sparc/sparc64 ;;
432 sparc64b | ultrasparc3)
433 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
434 thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
435 *) base_machine=$machine ;;
436 esac
437 changequote([,])dnl
438 AC_SUBST(base_machine)
440 if test "$base_machine" = "i386"; then
441 AC_DEFINE(USE_REGPARMS)
442 fi
444 # Compute the list of sysdep directories for this configuration.
445 # This can take a while to compute.
446 sysdep_dir=$srcdir/sysdeps
447 AC_MSG_CHECKING(sysdep dirs)
448 dnl We need to use [ and ] for other purposes for a while now.
449 changequote(,)dnl
450 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
451 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
453 case "$os" in
454 gnu*)
455 base_os=mach/hurd ;;
456 netbsd* | 386bsd* | freebsd* | bsdi*)
457 base_os=unix/bsd/bsd4.4 ;;
458 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
459 base_os=unix/bsd ;;
460 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
461 base_os=unix/sysv ;;
462 irix6*)
463 base_os=unix/sysv/irix6/$os ;;
464 solaris[2-9]*)
465 base_os=unix/sysv/sysv4 ;;
466 hpux*)
467 base_os=unix/sysv/hpux/$os ;;
468 aix4.3*)
469 base_os=unix/sysv/aix/aix4.3 ;;
470 none)
471 base_os=standalone ;;
472 *)
473 base_os='' ;;
474 esac
476 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
477 tail=$os
478 ostry=$os
479 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
480 ostry="$ostry /$o"
481 tail=$o
482 done
483 o=`echo $tail | sed 's/[0-9]*$//'`
484 if test $o != $tail; then
485 ostry="$ostry /$o"
486 fi
487 # For linux-gnu, try linux-gnu, then linux.
488 o=`echo $tail | sed 's/-.*$//'`
489 if test $o != $tail; then
490 ostry="$ostry /$o"
491 fi
493 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
494 base=
495 tail=$base_os
496 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
497 set $b
498 base="$base /$1"
499 tail="$2"
500 done
502 # For sparc/sparc32, try sparc/sparc32 and then sparc.
503 mach=
504 tail=$machine
505 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
506 set $m
507 # Prepend the machine's FPU directory unless --without-fp.
508 if test "$with_fp" = yes; then
509 mach="$mach /$1/fpu"
510 else
511 mach="$mach /$1/nofpu"
512 fi
513 mach="$mach /$1"
514 tail="$2"
515 done
517 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
518 changequote([,])dnl
520 # Find what sysdep directories exist.
521 sysnames=
522 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
523 for d in $add_ons_pfx ''; do
524 for b in $base ''; do
525 for m0 in $mach ''; do
526 for v in /$vendor ''; do
527 test "$v" = / && continue
528 for o in /$ostry ''; do
529 test "$o" = / && continue
530 for m in $mach ''; do
531 if test "$m0$b$v$o$m"; then
532 try="${d}sysdeps$m0$b$v$o$m"
533 test -n "$enable_debug_configure" &&
534 echo "$0 [DEBUG]: try $try" >&2
535 if test -d $srcdir/$try; then
536 sysnames="$sysnames $try"
537 { test -n "$o" || test -n "$b"; } && os_used=t
538 { test -n "$m" || test -n "$m0"; } && machine_used=t
539 fi
540 fi
541 done
542 done
543 done
544 done
545 done
546 done
547 IFS="$ac_save_ifs"
549 if test -z "$os_used" && test "$os" != none; then
550 AC_MSG_ERROR(Operating system $os is not supported.)
551 fi
552 if test -z "$machine_used" && test "$machine" != none; then
553 AC_MSG_ERROR(The $machine is not supported.)
554 fi
556 # We have now validated the configuration.
559 # If using ELF, look for an `elf' subdirectory of each machine directory.
560 # We prepend these rather than inserting them whereever the machine appears
561 # because things specified by the machine's ELF ABI should override
562 # OS-specific things, and should always be the same for any OS on the
563 # machine (otherwise what's the point of an ABI?).
564 if test "$elf" = yes; then
565 elf_dirs=
566 for d in $add_ons_pfx ''; do
567 for m in $mach; do
568 if test -d $srcdir/${d}sysdeps$m/elf; then
569 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
570 fi
571 done
572 done
573 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
574 fi
577 # Expand the list of system names into a full list of directories
578 # from each element's parent name and Implies file (if present).
579 set $sysnames
580 names=
581 while test $# -gt 0; do
582 name=$1
583 shift
585 case " $names " in *" $name "*)
586 # Already in the list.
587 continue
588 esac
590 # Report each name as we discover it, so there is no long pause in output.
591 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
593 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
595 case $name in
596 /*) xsrcdir= ;;
597 *) xsrcdir=$srcdir/ ;;
598 esac
599 test -n "$enable_debug_configure" &&
600 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
602 if test -f $xsrcdir$name/Implies; then
603 # Collect more names from the `Implies' file (removing comments).
604 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
605 implied=
606 for x in $implied_candidate; do
607 found=no
608 if test -d $xsrcdir$name_base/$x; then
609 implied="$implied $name_base/$x";
610 found=yes
611 fi
612 for d in $add_ons_pfx ''; do
613 try="${d}sysdeps/$x"
614 case $d in
615 /*) try_srcdir= ;;
616 *) try_srcdir=$srcdir/ ;;
617 esac
618 test -n "$enable_debug_configure" &&
619 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
620 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
621 then
622 implied="$implied $try"
623 found=yes
624 fi
625 done
626 if test $found = no; then
627 AC_MSG_WARN($name/Implies specifies nonexistent $x)
628 fi
629 done
630 else
631 implied=
632 fi
634 # Add NAME to the list of names.
635 names="$names $name"
637 # Find the parent of NAME, using the empty string if it has none.
638 changequote(,)dnl
639 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
640 changequote([,])dnl
642 # Add the names implied by NAME, and NAME's parent (if it has one), to
643 # the list of names to be processed (the argument list). We prepend the
644 # implied names to the list and append the parent. We want implied
645 # directories to come before further directories inferred from the
646 # configuration components; this ensures that for sysv4, unix/common
647 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
648 # after sysv4).
649 sysnames="`echo $implied $* $parent`"
650 test -n "$sysnames" && set $sysnames
651 done
653 # Add the default directories.
654 default_sysnames=sysdeps/generic
655 if test "$elf" = yes; then
656 default_sysnames="sysdeps/generic/elf $default_sysnames"
657 fi
658 sysnames="$names $default_sysnames"
659 AC_SUBST(sysnames)
660 # The other names were emitted during the scan.
661 AC_MSG_RESULT($default_sysnames)
664 ### Locate tools.
666 AC_PROG_INSTALL
667 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
668 # The makefiles need to use a different form to find it in $srcdir.
669 INSTALL='\$(..)./scripts/install-sh -c'
670 fi
671 AC_PROG_LN_S
673 AC_PROG_CC
674 if test $host != $build; then
675 AC_CHECK_PROGS(BUILD_CC, gcc cc)
676 fi
677 AC_SUBST(cross_compiling)
678 AC_PROG_CPP
679 # We need the C++ compiler only for testing.
680 AC_PROG_CXX
681 LIBC_PROG_BINUTILS
682 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
684 # Accept binutils 2.13 or newer.
685 AC_CHECK_PROG_VER(AS, $AS, --version,
686 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
687 [2.1[3-9]*], AS=: critic_missing="$critic_missing as")
688 AC_CHECK_PROG_VER(LD, $LD, --version,
689 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
690 [2.1[3-9]*], LD=: critic_missing="$critic_missing ld")
692 # We need the physical current working directory. We cannot use the
693 # "pwd -P" shell builtin since that's not portable. Instead we try to
694 # find a pwd binary. Note that assigning to the PWD environment
695 # variable might have some interesting side effects, so we don't do
696 # that.
697 AC_PATH_PROG(PWD_P, pwd, no)
698 if test "$PWD_P" = no; then
699 AC_MSG_ERROR(*** A pwd binary could not be found.)
700 fi
702 # These programs are version sensitive.
703 AC_CHECK_TOOL_PREFIX
704 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
705 [version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]*],
706 critic_missing="$critic_missing gcc")
707 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
708 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
709 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
711 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
712 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
713 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
714 MSGFMT=: aux_missing="$aux_missing msgfmt")
715 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
716 [GNU texinfo.* \([0-9][0-9.]*\)],
717 [4.*],
718 MAKEINFO=: aux_missing="$aux_missing makeinfo")
719 AC_CHECK_PROG_VER(SED, sed, --version,
720 [GNU sed version \([0-9]*\.[0-9.]*\)],
721 [3.0[2-9]*|3.[1-9]*|[4-9]*],
722 SED=: aux_missing="$aux_missing sed")
724 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
725 case "x$AUTOCONF" in
726 xno|x|x:) AUTOCONF=no ;;
727 *)
728 AC_CACHE_CHECK(dnl
729 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
730 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
731 libc_cv_autoconf_works=yes
732 else
733 libc_cv_autoconf_works=no
734 fi])
735 test $libc_cv_autoconf_works = yes || AUTOCONF=no
736 ;;
737 esac
738 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
739 # If --without-cvs they probably won't change configure.in, so no complaints.
740 aux_missing="$aux_missing autoconf"
741 fi
743 test -n "$critic_missing" && AC_MSG_ERROR([
744 *** These critical programs are missing or too old:$critic_missing
745 *** Check the INSTALL file for required versions.])
747 test -n "$aux_missing" && AC_MSG_WARN([
748 *** These auxiliary programs are missing or incompatible versions:$aux_missing
749 *** some features will be disabled.
750 *** Check the INSTALL file for required versions.])
752 # glibcbug.in wants to know the compiler version.
753 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
754 AC_SUBST(CCVERSION)
756 # if using special system headers, find out the compiler's sekrit
757 # header directory and add that to the list. NOTE: Only does the right
758 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
759 if test -n "$sysheaders"; then
760 ccheaders=`$CC -print-file-name=include`
761 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
762 fi
763 AC_SUBST(SYSINCLUDES)
765 # check if ranlib is necessary
766 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
767 cat > conftest.c <<EOF
768 int a;
769 char b;
770 void c(void) {}
771 EOF
772 $CC $CFLAGS $CPPFLAGS -c conftest.c
773 $AR cr conftest.a conftest.o
774 cp conftest.a conftest2.a
775 $RANLIB conftest.a
776 if cmp -s conftest.a conftest2.a; then
777 libc_cv_ranlib_necessary=no
778 else
779 libc_cv_ranlib_necessary=yes
780 fi
781 rm -rf conftest*])
782 if test "$libc_cv_ranlib_necessary" = no; then
783 RANLIB=:
784 fi
786 # Test if LD_LIBRARY_PATH contains the notation for the current directory
787 # since this would lead to problems installing/building glibc.
788 # LD_LIBRARY_PATH contains the current directory if one of the following
789 # is true:
790 # - one of the terminals (":" and ";") is the first or last sign
791 # - two terminals occur directly after each other
792 # - the path contains an element with a dot in it
793 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
794 changequote(,)dnl
795 case ${LD_LIBRARY_PATH} in
796 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
797 ld_library_path_setting="contains current directory"
798 ;;
799 *)
800 ld_library_path_setting="ok"
801 ;;
802 esac
803 changequote([,])dnl
804 AC_MSG_RESULT($ld_library_path_setting)
805 if test "$ld_library_path_setting" != "ok"; then
806 AC_MSG_ERROR([
807 *** LD_LIBRARY_PATH shouldn't contain the current directory when
808 *** building glibc. Please change the environment variable
809 *** and run configure again.])
810 fi
812 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
813 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
814 libc_cv_gcc_static_libgcc=
815 else
816 libc_cv_gcc_static_libgcc=-static-libgcc
817 fi])
818 AC_SUBST(libc_cv_gcc_static_libgcc)
820 AC_PATH_PROG(BASH, bash, no)
821 if test "$BASH" != no &&
822 $BASH -c 'test "$BASH_VERSINFO" \
823 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
824 libc_cv_have_bash2=yes
825 else
826 libc_cv_have_bash2=no
827 fi
828 AC_SUBST(libc_cv_have_bash2)
830 dnl We need a ksh compatible shell for tzselect.
831 if test "$BASH" = no; then
832 AC_PATH_PROG(KSH, ksh, no)
833 if test "$KSH" = no; then
834 libc_cv_have_ksh=no
835 else
836 libc_cv_have_ksh=yes
837 fi
838 else
839 KSH="$BASH"
840 AC_SUBST(KSH)
841 libc_cv_have_ksh=yes
842 fi
843 AC_SUBST(libc_cv_have_ksh)
845 AC_PROG_AWK
846 AC_PATH_PROG(PERL, perl, no)
847 if test "$PERL" != no &&
848 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
849 PERL=no
850 fi
851 AC_PATH_PROG(INSTALL_INFO, install-info, no,
852 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
853 if test "$INSTALL_INFO" != "no"; then
854 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
855 [mkdir conftest.d
856 # There is a hard ^_ on the next line. I am open to better ideas.
857 (echo '\x1f'
858 echo 'File: dir Node: Top This is the top of the INFO tree'
859 echo '* Menu:') >conftest.d/dir
860 (echo 'INFO-DIR-SECTION i-d-s works'
861 echo 'START-INFO-DIR-ENTRY'
862 echo '* Prog: (prog). Program.'
863 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
864 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AS_MESSAGE_LOG_FD 2>&1
865 then
866 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
867 then libc_cv_old_debian_install_info=no
868 else libc_cv_old_debian_install_info=yes
869 fi
870 else libc_cv_old_debian_install_info=no testfailed=t
871 fi
872 rm -fr conftest.d])
873 if test -n "$testfailed"
874 then AC_MSG_WARN([install-info errored out, check config.log])
875 fi
876 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
877 fi
878 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
880 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
882 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
883 echo '#include <stddef.h>
884 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
885 if eval "$ac_cpp conftest.c 2>/dev/null" \
886 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
887 libc_cv_signed_size_t=no
888 else
889 libc_cv_signed_size_t=yes
890 fi
891 rm -f conftest*])
892 if test $libc_cv_signed_size_t = yes; then
893 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
894 cat >> confdefs.h <<\EOF
895 #undef __SIZE_TYPE__
896 #define __SIZE_TYPE__ unsigned
897 EOF
898 fi
900 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
901 AC_TRY_COMPILE(dnl
902 [#define __need_size_t
903 #define __need_wchar_t
904 #include <stddef.h>
905 #define __need_NULL
906 #include <stddef.h>], [size_t size; wchar_t wchar;
907 #ifdef offsetof
908 #error stddef.h ignored __need_*
909 #endif
910 if (&size == NULL || &wchar == NULL) abort ();],
911 libc_cv_friendly_stddef=yes,
912 libc_cv_friendly_stddef=no)])
913 if test $libc_cv_friendly_stddef = yes; then
914 config_vars="$config_vars
915 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
916 fi
918 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
919 libc_cv_need_minus_P, [dnl
920 cat > conftest.S <<EOF
921 #include "confdefs.h"
922 /* Nothing whatsoever. */
923 EOF
924 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
925 libc_cv_need_minus_P=no
926 else
927 libc_cv_need_minus_P=yes
928 fi
929 rm -f conftest*])
930 if test $libc_cv_need_minus_P = yes; then
931 config_vars="$config_vars
932 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
933 fi
935 AC_MSG_CHECKING(whether .text pseudo-op must be used)
936 AC_CACHE_VAL(libc_cv_dot_text, [dnl
937 cat > conftest.s <<EOF
938 .text
939 EOF
940 libc_cv_dot_text=
941 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
942 libc_cv_dot_text=.text
943 fi
944 rm -f conftest*])
945 if test -z "$libc_cv_dot_text"; then
946 AC_MSG_RESULT(no)
947 else
948 AC_MSG_RESULT(yes)
949 fi
951 AC_CACHE_CHECK(for assembler global-symbol directive,
952 libc_cv_asm_global_directive, [dnl
953 libc_cv_asm_global_directive=UNKNOWN
954 for ac_globl in .globl .global .EXPORT; do
955 cat > conftest.s <<EOF
956 ${libc_cv_dot_text}
957 ${ac_globl} foo
958 foo:
959 EOF
960 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
961 libc_cv_asm_global_directive=${ac_globl}
962 fi
963 rm -f conftest*
964 test $libc_cv_asm_global_directive != UNKNOWN && break
965 done])
966 if test $libc_cv_asm_global_directive = UNKNOWN; then
967 AC_MSG_ERROR(cannot determine asm global directive)
968 else
969 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
970 fi
972 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
973 cat > conftest.s <<EOF
974 ${libc_cv_dot_text}
975 foo:
976 .set glibc_conftest_frobozz,foo
977 $libc_cv_asm_global_directive glibc_conftest_frobozz
978 EOF
979 # The alpha-dec-osf1 assembler gives only a warning for `.set'
980 # (but it doesn't work), so we must do a linking check to be sure.
981 cat > conftest1.c <<\EOF
982 extern int glibc_conftest_frobozz;
983 void _start() { glibc_conftest_frobozz = 1; }
984 EOF
985 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
986 -nostartfiles -nostdlib \
987 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
988 libc_cv_asm_set_directive=yes
989 else
990 libc_cv_asm_set_directive=no
991 fi
992 rm -f conftest*])
993 if test $libc_cv_asm_set_directive = yes; then
994 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
995 fi
997 AC_CACHE_CHECK(for assembler .type directive prefix,
998 libc_cv_asm_type_prefix, [dnl
999 libc_cv_asm_type_prefix=no
1000 for ac_try_prefix in '@' '%' '#'; do
1001 cat > conftest.s <<EOF
1002 ${libc_cv_dot_text}
1003 ${libc_cv_asm_global_directive} foo
1004 .type foo, ${ac_try_prefix}object
1005 .size foo, 1
1006 foo:
1007 .byte 1
1008 EOF
1009 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1010 libc_cv_asm_type_prefix=${ac_try_prefix}
1011 fi
1012 rm -f conftest*
1013 test "x$libc_cv_asm_type_prefix" != xno && break
1014 done])
1015 if test "x$libc_cv_asm_type_prefix" != xno; then
1016 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
1017 fi
1019 # The Aix ld uses global .symbol_names instead of symbol_names.
1020 # Unfortunately also used in the PPC64 ELF ABI.
1021 case "${os}${machine}" in
1022 aix4.3* | linux*powerpc/powerpc64*)
1023 AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
1024 esac
1026 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1027 [cat > conftest.s <<EOF
1028 ${libc_cv_dot_text}
1029 _sym:
1030 .symver _sym,sym@VERS
1031 EOF
1032 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1033 libc_cv_asm_symver_directive=yes
1034 else
1035 libc_cv_asm_symver_directive=no
1036 fi
1037 rm -f conftest*])
1038 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1039 if test $libc_cv_asm_symver_directive = yes; then
1040 cat > conftest.s <<EOF
1041 ${libc_cv_dot_text}
1042 _sym:
1043 .symver _sym,sym@VERS
1044 EOF
1045 cat > conftest.map <<EOF
1046 VERS_1 {
1047 global: sym;
1048 };
1050 VERS_2 {
1051 global: sym;
1052 } VERS_1;
1053 EOF
1054 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1055 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1056 -o conftest.so conftest.o
1057 -nostartfiles -nostdlib
1058 -Wl,--version-script,conftest.map
1059 1>&AS_MESSAGE_LOG_FD]);
1060 then
1061 libc_cv_ld_version_script_option=yes
1062 else
1063 libc_cv_ld_version_script_option=no
1064 fi
1065 else
1066 libc_cv_ld_version_script_option=no
1067 fi
1068 else
1069 libc_cv_ld_version_script_option=no
1070 fi
1071 rm -f conftest*])
1072 if test $shared != no &&
1073 test $libc_cv_asm_symver_directive = yes &&
1074 test $libc_cv_ld_version_script_option = yes &&
1075 test $enable_versioning = yes; then
1076 VERSIONING=yes
1077 AC_DEFINE(DO_VERSIONING)
1078 else
1079 VERSIONING=no
1080 fi
1081 AC_SUBST(VERSIONING)
1083 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1084 echo "\
1085 *** WARNING: You should not compile GNU libc without versioning. Not using
1086 *** versioning will introduce incompatibilities so that old binaries
1087 *** will not run anymore.
1088 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1089 fi
1090 if test $elf = yes; then
1091 AC_CACHE_CHECK(for .previous assembler directive,
1092 libc_cv_asm_previous_directive, [dnl
1093 cat > conftest.s <<EOF
1094 .section foo_section
1095 .previous
1096 EOF
1097 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1098 libc_cv_asm_previous_directive=yes
1099 else
1100 libc_cv_asm_previous_directive=no
1101 fi
1102 rm -f conftest*])
1103 if test $libc_cv_asm_previous_directive = yes; then
1104 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1105 else
1106 AC_CACHE_CHECK(for .popsection assembler directive,
1107 libc_cv_asm_popsection_directive, [dnl
1108 cat > conftest.s <<EOF
1109 .pushsection foo_section
1110 .popsection
1111 EOF
1112 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1113 libc_cv_asm_popsection_directive=yes
1114 else
1115 libc_cv_asm_popsection_directive=no
1116 fi
1117 rm -f conftest*])
1118 if test $libc_cv_asm_popsection_directive = yes; then
1119 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1120 fi
1121 fi
1122 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1123 libc_cv_asm_protected_directive, [dnl
1124 cat > conftest.s <<EOF
1125 .protected foo
1126 foo:
1127 .hidden bar
1128 bar:
1129 EOF
1130 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1131 libc_cv_asm_protected_directive=yes
1132 else
1133 libc_cv_asm_protected_directive=no
1134 fi
1135 rm -f conftest*])
1136 AC_SUBST(libc_cv_asm_protected_directive)
1137 AC_DEFINE(HAVE_PROTECTED)
1138 AC_DEFINE(HAVE_HIDDEN)
1140 if test $libc_cv_asm_protected_directive = yes; then
1141 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1142 libc_cv_visibility_attribute,
1143 [cat > conftest.c <<EOF
1144 int foo __attribute__ ((visibility ("hidden"))) = 1;
1145 int bar __attribute__ ((visibility ("protected"))) = 1;
1146 EOF
1147 libc_cv_visibility_attribute=no
1148 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1149 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1150 if grep '\.protected.*bar' conftest.s >/dev/null; then
1151 libc_cv_visibility_attribute=yes
1152 fi
1153 fi
1154 fi
1155 rm -f conftest.[cs]
1156 ])
1157 if test $libc_cv_visibility_attribute = yes; then
1158 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1159 fi
1160 fi
1162 if test $libc_cv_visibility_attribute = yes; then
1163 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1164 libc_cv_broken_visibility_attribute,
1165 [cat > conftest.c <<EOF
1166 int foo (int x);
1167 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1168 int bar (int x) { return x; }
1169 EOF
1170 libc_cv_broken_visibility_attribute=yes
1171 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
1172 changequote(,)dnl
1173 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1174 changequote([,])dnl
1175 libc_cv_broken_visibility_attribute=no
1176 fi
1177 fi
1178 rm -f conftest.c conftest.s
1179 ])
1180 if test $libc_cv_broken_visibility_attribute = yes; then
1181 AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
1182 fi
1183 fi
1185 AC_CACHE_CHECK(for broken __attribute__((alias())),
1186 libc_cv_broken_alias_attribute,
1187 [cat > conftest.c <<EOF
1188 extern int foo (int x) __asm ("xyzzy");
1189 int bar (int x) { return x; }
1190 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1191 extern int dfoo;
1192 extern __typeof (dfoo) dfoo __asm ("abccb");
1193 int dfoo = 1;
1194 EOF
1195 libc_cv_broken_alias_attribute=yes
1196 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1197 if grep 'xyzzy' conftest.s >/dev/null &&
1198 grep 'abccb' conftest.s >/dev/null; then
1199 libc_cv_broken_alias_attribute=no
1200 fi
1201 fi
1202 rm -f conftest.c conftest.s
1203 ])
1204 if test $libc_cv_broken_alias_attribute = yes; then
1205 AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
1206 fi
1208 if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
1209 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1210 libc_cv_have_sdata_section,
1211 [echo "int i;" > conftest.c
1212 libc_cv_have_sdata_section=no
1213 if ${CC-cc} $LDFLAGS -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1214 | grep '\.sdata' >/dev/null; then
1215 libc_cv_have_sdata_section=yes
1216 fi
1217 rm -f conftest.c conftest.so
1218 ])
1219 if test $libc_cv_have_sdata_section = yes; then
1220 AC_DEFINE(HAVE_SDATA_SECTION)
1221 fi
1222 fi
1224 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1225 libc_cv_initfinit_array, [dnl
1226 cat > conftest.c <<EOF
1227 int _start (void) { return 0; }
1228 int __start (void) { return 0; }
1229 int foo (void) { return 1; }
1230 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1231 EOF
1232 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1233 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1234 then
1235 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1236 libc_cv_initfinit_array=yes
1237 else
1238 libc_cv_initfinit_array=no
1239 fi
1240 else
1241 libc_cv_initfinit_array=no
1242 fi
1243 rm -f conftest*])
1244 AC_SUBST(libc_cv_initfinit_array)
1245 if test $libc_cv_initfinit_array = yes; then
1246 AC_DEFINE(HAVE_INITFINI_ARRAY)
1247 fi
1249 AC_CACHE_CHECK(for -z nodelete option,
1250 libc_cv_z_nodelete, [dnl
1251 cat > conftest.c <<EOF
1252 int _start (void) { return 42; }
1253 EOF
1254 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1255 -shared -o conftest.so conftest.c
1256 -nostartfiles -nostdlib
1257 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1258 then
1259 libc_cv_z_nodelete=yes
1260 else
1261 libc_cv_z_nodelete=no
1262 fi
1263 rm -f conftest*])
1264 AC_SUBST(libc_cv_z_nodelete)
1266 AC_CACHE_CHECK(for -z nodlopen option,
1267 libc_cv_z_nodlopen, [dnl
1268 cat > conftest.c <<EOF
1269 int _start (void) { return 42; }
1270 EOF
1271 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1272 -shared -o conftest.so conftest.c
1273 -nostartfiles -nostdlib
1274 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1275 then
1276 libc_cv_z_nodlopen=yes
1277 else
1278 libc_cv_z_nodlopen=no
1279 fi
1280 rm -f conftest*])
1281 AC_SUBST(libc_cv_z_nodlopen)
1283 AC_CACHE_CHECK(for -z initfirst option,
1284 libc_cv_z_initfirst, [dnl
1285 cat > conftest.c <<EOF
1286 int _start (void) { return 42; }
1287 EOF
1288 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1289 -shared -o conftest.so conftest.c
1290 -nostartfiles -nostdlib
1291 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1292 then
1293 libc_cv_z_initfirst=yes
1294 else
1295 libc_cv_z_initfirst=no
1296 fi
1297 rm -f conftest*])
1298 AC_SUBST(libc_cv_z_initfirst)
1300 AC_CACHE_CHECK(for -Bgroup option,
1301 libc_cv_Bgroup, [dnl
1302 cat > conftest.c <<EOF
1303 int _start (void) { return 42; }
1304 EOF
1305 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1306 -shared -o conftest.so conftest.c
1307 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1308 then
1309 libc_cv_Bgroup=yes
1310 else
1311 libc_cv_Bgroup=no
1312 fi
1313 rm -f conftest*])
1314 AC_SUBST(libc_cv_Bgroup)
1316 AC_CACHE_CHECK(for -z combreloc,
1317 libc_cv_z_combreloc, [dnl
1318 cat > conftest.c <<EOF
1319 extern int bar (int);
1320 extern int mumble;
1321 int foo (void) { return bar (mumble); }
1322 EOF
1323 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1324 -shared -o conftest.so conftest.c
1325 -nostdlib -nostartfiles
1326 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1327 then
1328 dnl The following test is a bit weak. We must use a tool which can test
1329 dnl cross-platform since the gcc used can be a cross compiler. Without
1330 dnl introducing new options this is not easily doable. Instead use a tool
1331 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1332 dnl look for a section named .rel.dyn.
1333 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1334 libc_cv_z_combreloc=yes
1335 else
1336 libc_cv_z_combreloc=no
1337 fi
1338 else
1339 libc_cv_z_combreloc=no
1340 fi
1341 rm -f conftest*])
1342 if test "$libc_cv_z_combreloc" = yes; then
1343 AC_DEFINE(HAVE_Z_COMBRELOC)
1344 fi
1345 fi
1346 AC_SUBST(libc_cv_z_combreloc)
1348 if test $elf != yes; then
1349 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1350 [AC_TRY_COMPILE(, [asm (".section .init");
1351 asm (".section .fini");
1352 asm ("${libc_cv_dot_text}");],
1353 libc_cv_have_initfini=yes,
1354 libc_cv_have_initfini=no)])
1355 AC_SUBST(libc_cv_have_initfini)dnl
1356 if test $libc_cv_have_initfini = yes; then
1357 AC_DEFINE(HAVE_INITFINI)
1358 fi
1359 fi
1361 if test $elf = yes -a $gnu_ld = yes; then
1362 AC_CACHE_CHECK(whether cc puts quotes around section names,
1363 libc_cv_have_section_quotes,
1364 [cat > conftest.c <<EOF
1365 static const int foo
1366 __attribute__ ((section ("bar"))) = 1;
1367 EOF
1368 if ${CC-cc} -S conftest.c -o conftest.s; then
1369 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1370 libc_cv_have_section_quotes=yes
1371 else
1372 libc_cv_have_section_quotes=no
1373 fi
1374 else
1375 libc_cv_have_section_quotes=unknown
1376 fi
1377 rm -f conftest.[cs]
1378 ])
1379 if test $libc_cv_have_section_quotes = yes; then
1380 AC_DEFINE(HAVE_SECTION_QUOTES)
1381 fi
1382 fi
1384 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1385 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1386 [cat > conftest.$ac_ext <<EOF
1387 dnl This sometimes fails to find confdefs.h, for some reason.
1388 dnl [#]line $LINENO "[$]0"
1389 [#]line $LINENO "configure"
1390 #include "confdefs.h"
1391 void underscore_test(void) {
1392 return; }
1393 EOF
1394 if AC_TRY_EVAL(ac_compile); then
1395 if grep _underscore_test conftest* >/dev/null; then
1396 ifelse([$1], , :, [rm -f conftest*
1397 $1])
1398 else
1399 ifelse([$2], , , [rm -f conftest*
1400 $2])
1401 fi
1402 else
1403 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1404 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1405 ifelse([$2], , , [rm -f conftest*
1406 $2])
1407 fi
1408 rm -f conftest*])
1410 if test $elf = yes; then
1411 libc_cv_asm_underscores=no
1412 else
1413 if test $ac_cv_prog_cc_works = yes; then
1414 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1415 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1416 libc_cv_asm_underscores=yes,
1417 libc_cv_asm_underscores=no)])
1418 else
1419 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1420 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1421 libc_cv_asm_underscores=no)])
1422 fi
1423 fi
1424 if test $libc_cv_asm_underscores = no; then
1425 AC_DEFINE(NO_UNDERSCORES)
1426 fi
1428 if test $elf = yes; then
1429 libc_cv_weak_symbols=yes
1430 fi
1432 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1433 [dnl
1434 cat > conftest.s <<EOF
1435 ${libc_cv_dot_text}
1436 ${libc_cv_asm_global_directive} foo
1437 foo:
1438 .weak foo
1439 .weak bar; bar = foo
1440 EOF
1441 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1442 libc_cv_asm_weak_directive=yes
1443 else
1444 libc_cv_asm_weak_directive=no
1445 fi
1446 rm -f conftest*])
1448 if test $libc_cv_asm_weak_directive = no; then
1449 AC_CACHE_CHECK(for assembler .weakext directive,
1450 libc_cv_asm_weakext_directive,
1451 [dnl
1452 cat > conftest.s <<EOF
1453 ${libc_cv_dot_text}
1454 ${libc_cv_asm_global_directive} foo
1455 foo:
1456 .weakext bar foo
1457 .weakext baz
1458 ${libc_cv_asm_global_directive} baz
1459 baz:
1460 EOF
1461 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1462 libc_cv_asm_weakext_directive=yes
1463 else
1464 libc_cv_asm_weakext_directive=no
1465 fi
1466 rm -f conftest*])
1468 fi # no .weak
1470 if test $libc_cv_asm_weak_directive = yes; then
1471 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1472 elif test $libc_cv_asm_weakext_directive = yes; then
1473 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1474 fi
1476 dnl The standard hppa assembler uses `;' to start comments and `!'
1477 dnl as a line separator. CRIS uses `;' to start comments and `@' for
1478 dnl line separator.
1479 case "${host_cpu}-${host_os}" in
1480 cris*)
1481 libc_cv_asm_line_sep='@'
1482 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1483 ;;
1484 hppa*linux*)
1485 AC_CACHE_CHECK(for assembler line separator,
1486 libc_cv_asm_line_sep, [dnl
1487 cat > conftest.s <<EOF
1488 nop ; is_old_puffin
1489 EOF
1490 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1491 libc_cv_asm_line_sep='!'
1492 else
1493 if test -z "$enable_hacker_mode"; then
1494 echo "*** You need a newer assembler to compile glibc"
1495 rm -f conftest*
1496 exit 1
1497 fi
1498 libc_cv_asm_line_sep=';'
1499 fi
1500 rm -f conftest*])
1501 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1502 ;;
1503 esac
1505 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1506 cat > conftest.s <<EOF
1507 .text
1508 .type func,@function
1509 func:
1510 .cfi_startproc
1511 .cfi_endproc
1512 EOF
1513 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1514 libc_cv_asm_cfi_directives=yes
1515 else
1516 libc_cv_asm_cfi_directives=no
1517 fi
1518 rm -f conftest*])
1519 if test $libc_cv_asm_cfi_directives = yes; then
1520 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1521 fi
1523 AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
1524 libc_cv_cpp_asm_debuginfo, [dnl
1525 cat > conftest.S <<EOF
1526 #include "confdefs.h"
1528 /* comment on
1529 two lines */
1530 ${libc_cv_dot_text}
1531 ${libc_cv_asm_global_directive} foo
1532 foo:
1533 /* Unfortunately this test only works for a real instruction,
1534 not for any of the machine-independent pseudo-ops.
1535 So we just have to assume everybody has a "nop". */
1536 nop
1537 /* comment */
1538 nop
1539 /* comment */
1540 nop
1541 EOF
1542 if AC_TRY_COMMAND([${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) &&
1543 ac_pattern='conftest\.S'
1544 AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
1545 grep $ac_pattern 1>&AS_MESSAGE_LOG_FD]); then
1546 libc_cv_cpp_asm_debuginfo=yes
1547 else
1548 libc_cv_cpp_asm_debuginfo=no
1549 fi
1550 rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
1551 if test $libc_cv_cpp_asm_debuginfo = yes; then
1552 AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
1553 fi
1555 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1556 cat > conftest.c <<\EOF
1557 _start () {}
1558 int __eh_pc;
1559 __throw () {}
1560 EOF
1561 dnl No \ in command here because it ends up inside ''.
1562 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1563 -nostdlib -nostartfiles -Wl,--no-whole-archive
1564 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1565 libc_cv_ld_no_whole_archive=yes
1566 else
1567 libc_cv_ld_no_whole_archive=no
1568 fi
1569 rm -f conftest*])
1570 if test $libc_cv_ld_no_whole_archive = yes; then
1571 no_whole_archive=-Wl,--no-whole-archive
1572 fi
1573 AC_SUBST(no_whole_archive)dnl
1575 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1576 cat > conftest.c <<\EOF
1577 _start () {}
1578 int __eh_pc;
1579 __throw () {}
1580 EOF
1581 dnl No \ in command here because it ends up inside ''.
1582 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1583 -nostdlib -nostartfiles -fexceptions
1584 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1585 libc_cv_gcc_exceptions=yes
1586 else
1587 libc_cv_gcc_exceptions=no
1588 fi
1589 rm -f conftest*])
1590 if test $libc_cv_gcc_exceptions = yes; then
1591 exceptions=-fexceptions
1592 fi
1593 AC_SUBST(exceptions)dnl
1595 if test "$host_cpu" = powerpc ; then
1596 # Check for a bug present in at least versions 2.8.x of GCC
1597 # and versions 1.0.x of EGCS.
1598 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1599 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1600 libc_cv_c_asmcr0_bug='no',
1601 libc_cv_c_asmcr0_bug='yes')])
1602 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1603 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1604 fi
1605 fi
1607 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1608 [cat > conftest.c <<EOF
1609 #line $LINENO "configure"
1610 static char *__EH_FRAME_BEGIN__;
1611 _start ()
1612 {
1613 #ifdef CHECK__register_frame
1614 __register_frame (__EH_FRAME_BEGIN__);
1615 __deregister_frame (__EH_FRAME_BEGIN__);
1616 #endif
1617 #ifdef CHECK__register_frame_info
1618 __register_frame_info (__EH_FRAME_BEGIN__);
1619 __deregister_frame_info (__EH_FRAME_BEGIN__);
1620 #endif
1621 }
1622 int __eh_pc;
1623 __throw () {}
1624 /* FIXME: this is fragile. */
1625 malloc () {}
1626 strcmp () {}
1627 strlen () {}
1628 memcpy () {}
1629 memset () {}
1630 free () {}
1631 abort () {}
1632 __bzero () {}
1633 dl_iterate_phdr () {}
1634 EOF
1635 libc_unwind_check="${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame_info \
1636 $LDFLAGS \
1637 -nostdlib -nostartfiles -o conftest conftest.c \
1638 -lgcc"
1639 # Some platforms' specs put -lgcc first. The second one doesn't hurt.
1640 if AC_TRY_COMMAND([$libc_unwind_check >&AS_MESSAGE_LOG_FD]) ||
1641 AC_TRY_COMMAND([$libc_unwind_check -lgcc_eh -lgcc >&AS_MESSAGE_LOG_FD])
1642 then
1643 if $libc_unwind_check -v 2>&1 >/dev/null \
1644 | grep -q -- --eh-frame-hdr; then
1645 libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
1646 else
1647 libc_cv_gcc_dwarf2_unwind_info=static
1648 fi
1649 else
1650 libc_cv_gcc_dwarf2_unwind_info=no
1651 fi
1652 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1653 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame
1654 $LDFLAGS -nostdlib -nostartfiles
1655 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1656 libc_cv_gcc_dwarf2_unwind_info=yes
1657 else
1658 libc_cv_gcc_dwarf2_unwind_info=no
1659 fi
1660 fi
1661 rm -f conftest*])
1662 case $libc_cv_gcc_dwarf2_unwind_info in
1663 yes)
1664 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1665 ;;
1666 static)
1667 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1668 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1669 ;;
1670 esac
1672 dnl Check whether compiler understands __builtin_expect.
1673 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1674 [cat > conftest.c <<EOF
1675 #line $LINENO "configure"
1676 int foo (int a)
1677 {
1678 a = __builtin_expect (a, 10);
1679 return a == 10 ? 0 : 1;
1680 }
1681 EOF
1682 dnl No \ in command here because it ends up inside ''.
1683 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1684 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1685 libc_cv_gcc_builtin_expect=yes
1686 else
1687 libc_cv_gcc_builtin_expect=no
1688 fi
1689 rm -f conftest*])
1690 if test "$libc_cv_gcc_builtin_expect" = yes; then
1691 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1692 fi
1694 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1695 cat > conftest.c <<\EOF
1696 void zero (void *x)
1697 {
1698 __builtin_memset (x, 0, 1000);
1699 }
1700 EOF
1701 dnl
1702 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1703 then
1704 libc_cv_gcc_builtin_memset=no
1705 else
1706 libc_cv_gcc_builtin_memset=yes
1707 fi
1708 rm -f conftest* ])
1709 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1710 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1711 fi
1713 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1714 cat > conftest.c <<\EOF
1715 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1716 char *foo (const char *a, const char *b)
1717 {
1718 return __builtin_strstr (a, b);
1719 }
1720 EOF
1721 dnl
1722 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1723 then
1724 libc_cv_gcc_builtin_redirection=yes
1725 else
1726 libc_cv_gcc_builtin_redirection=no
1727 fi
1728 rm -f conftest* ])
1729 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
1730 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
1731 fi
1733 dnl Check whether the compiler supports subtraction of local labels.
1734 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1735 [cat > conftest.c <<EOF
1736 changequote(,)dnl
1737 #line $LINENO "configure"
1738 int foo (int a)
1739 {
1740 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1741 void *p = &&l1 + ar[a];
1742 goto *p;
1743 l1:
1744 return 1;
1745 l2:
1746 return 2;
1747 }
1748 changequote([,])dnl
1749 EOF
1750 dnl No \ in command here because it ends up inside ''.
1751 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1752 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1753 libc_cv_gcc_subtract_local_labels=yes
1754 else
1755 libc_cv_gcc_subtract_local_labels=no
1756 fi
1757 rm -f conftest*])
1758 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1759 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1760 fi
1762 dnl Check whether the compiler supports the __thread keyword.
1763 if test "x$use__thread" != xno; then
1764 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1765 [cat > conftest.c <<\EOF
1766 __thread int a = 42;
1767 EOF
1768 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1769 libc_cv_gcc___thread=yes
1770 else
1771 libc_cv_gcc___thread=no
1772 fi
1773 rm -f conftest*])
1774 if test "$libc_cv_gcc___thread" = yes; then
1775 AC_DEFINE(HAVE___THREAD)
1776 fi
1777 else
1778 libc_cv_gcc___thread=no
1779 fi
1781 if test "$libc_cv_gcc___thread" = yes; then
1782 dnl Check whether the compiler supports the tls_model attribute.
1783 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1784 cat > conftest.c <<\EOF
1785 extern __thread int a __attribute__((tls_model ("initial-exec")));
1786 EOF
1787 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1788 libc_cv_gcc_tls_model_attr=yes
1789 else
1790 libc_cv_gcc_tls_model_attr=no
1791 fi
1792 rm -f conftest*])
1793 if test "$libc_cv_gcc_tls_model_attr" = yes; then
1794 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
1795 fi
1796 fi
1798 dnl Check whether we have the gd library available.
1799 AC_MSG_CHECKING(for libgd)
1800 if test "$with_gd" != "no"; then
1801 old_CFLAGS="$CFLAGS"
1802 CFLAGS="$CFLAGS $libgd_include"
1803 old_LDFLAGS="$LDFLAGS"
1804 LDFLAGS="$LDFLAGS $libgd_ldflags"
1805 old_LIBS="$LIBS"
1806 LIBS="$LIBS -lgd -lpng -lz -lm"
1807 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1808 CFLAGS="$old_CFLAGS"
1809 LDFLAGS="$old_LDFLAGS"
1810 LIBS="$old_LIBS"
1811 else
1812 LIBGD=no
1813 fi
1814 AC_MSG_RESULT($LIBGD)
1815 AC_SUBST(LIBGD)
1817 dnl check for the size of 'long double'.
1818 AC_CHECK_SIZEOF(long double, 0)
1819 sizeof_long_double=$ac_cv_sizeof_long_double
1820 AC_SUBST(sizeof_long_double)
1822 ### End of automated tests.
1823 ### Now run sysdeps configure fragments.
1825 # They also can set these variables.
1826 use_ldconfig=no
1827 ldd_rewrite_script=no
1828 libc_cv_sysconfdir=$sysconfdir
1829 libc_cv_gcc_unwind_find_fde=no
1831 # Iterate over all the sysdep directories we will use, running their
1832 # configure fragments, and looking for a uname implementation.
1833 uname=
1834 for dir in $sysnames; do
1835 case $dir in
1836 /*) dest=$dir ;;
1837 *) dest=$srcdir/$dir ;;
1838 esac
1839 if test -r $dest/configure; then
1840 AC_MSG_RESULT(running configure fragment for $dir)
1841 . $dest/configure
1842 fi
1843 [
1844 if test -z "$uname"; then
1845 if test -r $dest/uname.c ||
1846 test -r $dest/uname.S ||
1847 { test -r $dest/syscalls.list &&
1848 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1849 uname=$dir
1850 fi
1851 fi
1852 ]dnl
1853 done
1855 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
1856 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
1857 fi
1858 AC_SUBST(libc_cv_gcc_unwind_find_fde)
1860 # If we will use the generic uname implementation, we must figure out what
1861 # it will say by examining the system, and write the results in config-name.h.
1862 if test "$uname" = "sysdeps/generic"; then
1864 changequote(,)dnl
1865 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1866 changequote([,])dnl
1867 if test $uname_sysname != $config_os; then
1868 config_release=`echo $config_os | sed s/$uname_sysname//`
1869 fi
1870 dnl
1871 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1872 if test -r /vmunix; then
1873 kernel_id=`strings /vmunix | grep UNIX`
1874 elif test -r /dynix; then
1875 kernel_id=`strings /dynix | grep DYNIX`
1876 else
1877 kernel_id=
1878 fi
1879 ])dnl
1881 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1882 LIBC_KERNEL_ID
1883 changequote(,)dnl
1884 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1885 changequote([,])dnl
1886 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1887 != x$config_release; then
1888 # The configuration release is a substring of the kernel release.
1889 libc_cv_uname_release=$kernel_release
1890 elif test x$config_release != x; then
1891 libc_cv_uname_release=$config_release
1892 elif test x$kernel_release != x; then
1893 libc_cv_uname_release=$kernel_release
1894 else
1895 libc_cv_uname_release=unknown
1896 fi])
1897 uname_release="$libc_cv_uname_release"
1899 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1900 LIBC_KERNEL_ID
1901 changequote(,)dnl
1902 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1903 changequote([,])dnl
1904 if test -n "$kernel_version"; then
1905 libc_cv_uname_version="$kernel_version"
1906 else
1907 libc_cv_uname_version=unknown
1908 fi])
1909 uname_version="$libc_cv_uname_version"
1911 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1912 config_uname=config-name.h:config-name.in
1913 else
1914 # For non-generic uname, we don't need to create config-name.h at all.
1915 config_uname=
1916 fi
1918 dnl This is tested by existing code and it's simpler to avoid changing it.
1919 AC_DEFINE(USE_IN_LIBIO)
1921 # Test for old glibc 2.0.x headers so that they can be removed properly
1922 # Search only in includedir.
1923 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1924 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1925 then
1926 old_glibc_headers=yes
1927 else
1928 old_glibc_headers=no
1929 fi
1930 AC_MSG_RESULT($old_glibc_headers)
1931 if test ${old_glibc_headers} = yes; then
1932 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1933 AC_MSG_WARN(*** be removed.)
1934 fi
1935 AC_SUBST(old_glibc_headers)
1937 AC_SUBST(libc_cv_slibdir)
1938 AC_SUBST(libc_cv_localedir)
1939 AC_SUBST(libc_cv_sysconfdir)
1940 AC_SUBST(libc_cv_rootsbindir)
1942 AC_SUBST(use_ldconfig)
1943 AC_SUBST(ldd_rewrite_script)
1945 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
1946 if test $gnu_ld = yes; then
1947 AC_DEFINE(HAVE_GNU_LD)
1948 fi
1949 if test $gnu_as = yes; then
1950 AC_DEFINE(HAVE_GNU_AS)
1951 fi
1952 if test $elf = yes; then
1953 AC_DEFINE(HAVE_ELF)
1954 fi
1955 if test $xcoff = yes; then
1956 AC_DEFINE(HAVE_XCOFF)
1957 fi
1959 AC_SUBST(static)
1960 AC_SUBST(shared)
1961 if test $shared = default; then
1962 if test $gnu_ld = yes; then
1963 shared=$elf
1964 else
1965 # For now we do not assume shared libs are available. In future more
1966 # tests might become available.
1967 shared=no
1968 fi
1969 fi
1971 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1972 [pic_default=yes
1973 cat > conftest.c <<EOF
1974 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1975 # error PIC is default.
1976 #endif
1977 EOF
1978 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
1979 pic_default=no
1980 fi
1981 rm -f conftest.*])
1982 AC_SUBST(pic_default)
1984 AC_SUBST(profile)
1985 AC_SUBST(omitfp)
1986 AC_SUBST(bounded)
1987 AC_SUBST(static_nss)
1988 AC_SUBST(nopic_initfini)
1990 AC_SUBST(DEFINES)
1992 case "$add_ons" in
1993 *door*) linux_doors=yes ;;
1994 *) linux_doors=no ;;
1995 esac
1996 AC_SUBST(linux_doors)
1998 dnl See sysdeps/mach/configure.in for this variable.
1999 AC_SUBST(mach_interface_list)
2001 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2002 config_makefile=
2003 else
2004 config_makefile=Makefile
2005 fi
2007 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2008 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2009 AC_SUBST(VERSION)
2010 AC_SUBST(RELEASE)
2012 AC_CONFIG_FILES([config.make glibcbug ${config_makefile} ${config_uname}])
2013 AC_CONFIG_COMMANDS([default],[[
2014 case $CONFIG_FILES in *config.make*)
2015 echo "$config_vars" >> config.make;;
2016 esac
2017 test -d bits || mkdir bits]],[[config_vars='$config_vars']])
2018 AC_OUTPUT