| blob | 30cf01266cbd4111affcb349dfa5bd80674639cd |
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$hidden" = xno; then
203 AC_DEFINE(NO_HIDDEN)
204 fi
206 AC_ARG_ENABLE([bind-now],
207 AC_HELP_STRING([--enable-bind-now],
208 [disable lazy relocations in DSOs]),
209 [bindnow=$enableval],
210 [bindnow=no])
211 AC_SUBST(bindnow)
213 AC_CONFIG_SUBDIRS([ ])dnl Bonehead new Autoconf whines if we do it cleanly.
214 add_ons_pfx=
215 if test x"$add_ons" != x; then
216 for f in $add_ons; do
217 # Some sanity checks
218 if test "$f" = "crypt"; then
219 AC_MSG_ERROR([
220 *** It seems that you're using an old \`crypt' add-on. crypt is now
221 *** part of glibc and using the old add-on will not work with this
222 *** release. Start again with fresh sources and without the old
223 *** \`crypt' add-on.])
224 fi
225 if test "$f" = "localedata"; then
226 AC_MSG_ERROR([
227 *** It seems that you're using an old \`localedata' add-on. localedata
228 *** is now part of glibc and using the old add-on will not work with
229 *** this release. Start again with fresh sources and without the old
230 *** \`localedata' add-on.])
231 fi
232 # Test whether such a subdir really exists.
233 if test -d $srcdir/$f; then
234 add_ons_pfx="$add_ons_pfx $f/"
235 dnl This variable is what AC_CONFIG_SUBDIRS is supposed to set,
236 dnl but the new Autoconf maintainers don't care about compatibility
237 dnl so we cannot use it normally any more without complaints.
238 subdirs="$subdirs $f"
239 else
240 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
241 fi
242 done
243 fi
245 dnl On some platforms we cannot use dynamic loading. We must provide
246 dnl static NSS modules.
247 AC_ARG_ENABLE([static-nss],
248 AC_HELP_STRING([--enable-static-nss],
249 [build static NSS modules @<:@default=no@:>@]),
250 [static_nss=$enableval],
251 [static_nss=no])
252 dnl Enable static NSS also if we build no shared objects.
253 if test x"$static_nss" = xyes || test x"$shared" = xno; then
254 static_nss=yes
255 AC_DEFINE(DO_STATIC_NSS)
256 fi
258 AC_ARG_ENABLE([force-install],
259 AC_HELP_STRING([--disable-force-install],
260 [don't force installation of files from this package, even if they are older than the installed files]),
261 [force_install=$enableval],
262 [force_install=yes])
263 AC_SUBST(force_install)
265 dnl On some platforms we allow dropping compatibility with all kernel
266 dnl versions.
267 AC_ARG_ENABLE([kernel],
268 AC_HELP_STRING([--enable-kernel=VERSION],
269 [compile for compatibility with kernel not older than VERSION]),
270 [minimum_kernel=$enableval],
271 [])
272 dnl Prevent unreasonable values.
273 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
274 # Better nothing than this.
275 minimum_kernel=""
276 else
277 if test "$minimum_kernel" = current; then
278 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
279 fi
280 fi
282 dnl For the development we sometimes want gcc to issue even more warnings.
283 dnl This is not the default since many of the extra warnings are not
284 dnl appropriate.
285 AC_ARG_ENABLE([all-warnings],
286 AC_HELP_STRING([--enable-all-warnings],
287 [enable all useful warnings gcc can issue]),
288 [all_warnings=$enableval],
289 [])
290 AC_SUBST(all_warnings)
292 AC_CANONICAL_HOST
294 # The way shlib-versions is used to generate soversions.mk uses a
295 # fairly simplistic model for name recognition that can't distinguish
296 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
297 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
298 # tell. This doesn't get used much beyond that, so it's fairly safe.
299 case "$host_os" in
300 linux*)
301 ;;
302 gnu*)
303 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
304 ;;
305 esac
307 # We keep the original values in `$config_*' and never modify them, so we
308 # can write them unchanged into config.make. Everything else uses
309 # $machine, $vendor, and $os, and changes them whenever convenient.
310 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
312 # Don't allow vendor == "unknown"
313 test "$config_vendor" = unknown && config_vendor=
314 config_os="`echo $config_os | sed 's/^unknown-//'`"
316 # Some configurations imply other options.
317 case "$host_os" in
318 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
319 # These systems always use GNU tools.
320 gnu_ld=yes gnu_as=yes ;;
321 esac
322 case "$host_os" in
323 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
324 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
325 ;;
326 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
327 # These systems (almost) always use the ELF format.
328 elf=yes
329 ;;
330 aix*)
331 # These systems are always xcoff
332 xcoff=yes
333 elf=no
334 ;;
335 esac
337 machine=$config_machine
338 vendor=$config_vendor
339 os=$config_os
341 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
342 # Unify this here.
343 if test "$machine" = rs6000; then
344 machine="powerpc"
345 fi
347 # Braindead PowerPC box with absolutely no FPU.
348 case "$machine-$host_os" in
349 powerpc*-*soft)
350 with_fp=no
351 ;;
352 esac
354 ###
355 ### I put this here to prevent those annoying emails from people who cannot
356 ### read and try to compile glibc on unsupported platforms. --drepper
357 ###
358 ### By using the undocumented --enable-hacker-mode option for configure
359 ### one can skip this test to make the configuration not fail for unsupported
360 ### platforms.
361 ###
362 if test -z "$enable_hacker_mode"; then
363 case "$machine-$host_os" in
364 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
365 ;;
366 *)
367 echo "*** The GNU C library is currently not available for this platform."
368 echo "*** So far nobody cared to port it and if there is no volunteer it"
369 echo "*** might never happen. So, if you have interest to see glibc on"
370 echo "*** this platform visit"
371 echo "*** http://www.gnu.org/software/libc/porting.html"
372 echo "*** and join the group of porters"
373 exit 1
374 ;;
375 esac
376 fi
378 dnl We need to use [ and ] for other purposes for a while now.
379 changequote(,)dnl
380 # Expand the configuration machine name into a subdirectory by architecture
381 # type and particular chip.
382 case "$machine" in
383 a29k | am29000) base_machine=a29k machine=a29k ;;
384 alpha*) base_machine=alpha machine=alpha/$machine ;;
385 arm*) base_machine=arm machine=arm/arm32/$machine ;;
386 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
387 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
388 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
389 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
390 i[3456]86) base_machine=i386 machine=i386/$machine ;;
391 ia64) base_machine=ia64 machine=ia64 ;;
392 m680?0) base_machine=m68k machine=m68k/$machine ;;
393 m68k) base_machine=m68k machine=m68k/m68020 ;;
394 m88???) base_machine=m88k machine=m88k/$machine ;;
395 m88k) base_machine=m88k machine=m88k/m88100 ;;
396 mips64*) base_machine=mips64
397 case "$CC $CFLAGS $CPPFLAGS " in
398 *" -mabi=n32 "*) mips_cc_abi=n32 ;;
399 *" -mabi=64 "*|*" -mabi=n64 "*) mips_cc_abi=64 ;;
400 *" -mabi=32 "*|*" -mabi=o32 "*) mips_cc_abi=32 ;;
401 *) mips_cc_abi=default ;;
402 esac
403 case $config_os in
404 *abin32*) mips_config_abi=n32 ;;
405 *abi64*|*abin64*) mips_config_abi=64 ;;
406 *abi32*|*abio32*) mips_config_abi=32 ;;
407 *) mips_config_abi=$mips_cc_abi ;;
408 esac
409 case $mips_config_abi in
410 default) machine=mips/mips64/n32 mips_config_abi=n32 ;;
411 n32) machine=mips/mips64/n32 ;;
412 64) machine=mips/mips64/n64 ;;
413 32) machine=mips/mips32/kern64 ;;
414 esac
415 machine=$machine/$config_machine
416 if test $mips_config_abi != $mips_cc_abi; then
417 # This won't make it to config.make, but we want to
418 # set this in case configure tests depend on it.
419 CPPFLAGS="$CPPFLAGS -mabi=$mips_config_abi"
420 fi
421 ;;
422 mips*) base_machine=mips machine=mips/mips32/$machine ;;
423 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
424 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
425 s390) base_machine=s390 machine=s390/s390-32 ;;
426 s390x) base_machine=s390 machine=s390/s390-64 ;;
427 sh3*) base_machine=sh machine=sh/sh3 ;;
428 sh4*) base_machine=sh machine=sh/sh4 ;;
429 sparc | sparcv[67])
430 base_machine=sparc machine=sparc/sparc32 ;;
431 sparcv8 | supersparc | hypersparc)
432 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
433 sparcv8plus | sparcv8plusa | sparcv9)
434 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
435 sparcv8plusb | sparcv9b)
436 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
437 sparc64 | ultrasparc)
438 base_machine=sparc machine=sparc/sparc64 ;;
439 sparc64b | ultrasparc3)
440 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
441 thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
442 *) base_machine=$machine ;;
443 esac
444 changequote([,])dnl
445 AC_SUBST(base_machine)
447 if test "$base_machine" = "i386"; then
448 AC_DEFINE(USE_REGPARMS)
449 fi
451 # Compute the list of sysdep directories for this configuration.
452 # This can take a while to compute.
453 sysdep_dir=$srcdir/sysdeps
454 AC_MSG_CHECKING(sysdep dirs)
455 dnl We need to use [ and ] for other purposes for a while now.
456 changequote(,)dnl
457 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
458 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
460 case "$os" in
461 gnu*)
462 base_os=mach/hurd ;;
463 netbsd* | 386bsd* | freebsd* | bsdi*)
464 base_os=unix/bsd/bsd4.4 ;;
465 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
466 base_os=unix/bsd ;;
467 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
468 base_os=unix/sysv ;;
469 irix6*)
470 base_os=unix/sysv/irix6/$os ;;
471 solaris[2-9]*)
472 base_os=unix/sysv/sysv4 ;;
473 hpux*)
474 base_os=unix/sysv/hpux/$os ;;
475 aix4.3*)
476 base_os=unix/sysv/aix/aix4.3 ;;
477 none)
478 base_os=standalone ;;
479 *)
480 base_os='' ;;
481 esac
483 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
484 tail=$os
485 ostry=$os
486 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
487 ostry="$ostry /$o"
488 tail=$o
489 done
490 o=`echo $tail | sed 's/[0-9]*$//'`
491 if test $o != $tail; then
492 ostry="$ostry /$o"
493 fi
494 # For linux-gnu, try linux-gnu, then linux.
495 o=`echo $tail | sed 's/-.*$//'`
496 if test $o != $tail; then
497 ostry="$ostry /$o"
498 fi
500 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
501 base=
502 tail=$base_os
503 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
504 set $b
505 base="$base /$1"
506 tail="$2"
507 done
509 # For sparc/sparc32, try sparc/sparc32 and then sparc.
510 mach=
511 tail=$machine
512 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
513 set $m
514 # Prepend the machine's FPU directory unless --without-fp.
515 if test "$with_fp" = yes; then
516 mach="$mach /$1/fpu"
517 else
518 mach="$mach /$1/nofpu"
519 fi
520 mach="$mach /$1"
521 tail="$2"
522 done
524 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
525 changequote([,])dnl
527 # Find what sysdep directories exist.
528 sysnames=
529 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
530 for d in $add_ons_pfx ''; do
531 for b in $base ''; do
532 for m0 in $mach ''; do
533 for v in /$vendor ''; do
534 test "$v" = / && continue
535 for o in /$ostry ''; do
536 test "$o" = / && continue
537 for m in $mach ''; do
538 if test "$m0$b$v$o$m"; then
539 try="${d}sysdeps$m0$b$v$o$m"
540 test -n "$enable_debug_configure" &&
541 echo "$0 [DEBUG]: try $try" >&2
542 if test -d $srcdir/$try; then
543 sysnames="$sysnames $try"
544 { test -n "$o" || test -n "$b"; } && os_used=t
545 { test -n "$m" || test -n "$m0"; } && machine_used=t
546 fi
547 fi
548 done
549 done
550 done
551 done
552 done
553 done
554 IFS="$ac_save_ifs"
556 if test -z "$os_used" && test "$os" != none; then
557 AC_MSG_ERROR(Operating system $os is not supported.)
558 fi
559 if test -z "$machine_used" && test "$machine" != none; then
560 AC_MSG_ERROR(The $machine is not supported.)
561 fi
563 # We have now validated the configuration.
566 # If using ELF, look for an `elf' subdirectory of each machine directory.
567 # We prepend these rather than inserting them whereever the machine appears
568 # because things specified by the machine's ELF ABI should override
569 # OS-specific things, and should always be the same for any OS on the
570 # machine (otherwise what's the point of an ABI?).
571 if test "$elf" = yes; then
572 elf_dirs=
573 for d in $add_ons_pfx ''; do
574 for m in $mach; do
575 if test -d $srcdir/${d}sysdeps$m/elf; then
576 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
577 fi
578 done
579 done
580 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
581 fi
584 # Expand the list of system names into a full list of directories
585 # from each element's parent name and Implies file (if present).
586 set $sysnames
587 names=
588 while test $# -gt 0; do
589 name=$1
590 shift
592 case " $names " in *" $name "*)
593 # Already in the list.
594 continue
595 esac
597 # Report each name as we discover it, so there is no long pause in output.
598 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
600 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
602 case $name in
603 /*) xsrcdir= ;;
604 *) xsrcdir=$srcdir/ ;;
605 esac
606 test -n "$enable_debug_configure" &&
607 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
609 if test -f $xsrcdir$name/Implies; then
610 # Collect more names from the `Implies' file (removing comments).
611 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
612 implied=
613 for x in $implied_candidate; do
614 found=no
615 if test -d $xsrcdir$name_base/$x; then
616 implied="$implied $name_base/$x";
617 found=yes
618 fi
619 for d in $add_ons_pfx ''; do
620 try="${d}sysdeps/$x"
621 case $d in
622 /*) try_srcdir= ;;
623 *) try_srcdir=$srcdir/ ;;
624 esac
625 test -n "$enable_debug_configure" &&
626 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
627 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
628 then
629 implied="$implied $try"
630 found=yes
631 fi
632 done
633 if test $found = no; then
634 AC_MSG_WARN($name/Implies specifies nonexistent $x)
635 fi
636 done
637 else
638 implied=
639 fi
641 # Add NAME to the list of names.
642 names="$names $name"
644 # Find the parent of NAME, using the empty string if it has none.
645 changequote(,)dnl
646 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
647 changequote([,])dnl
649 # Add the names implied by NAME, and NAME's parent (if it has one), to
650 # the list of names to be processed (the argument list). We prepend the
651 # implied names to the list and append the parent. We want implied
652 # directories to come before further directories inferred from the
653 # configuration components; this ensures that for sysv4, unix/common
654 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
655 # after sysv4).
656 sysnames="`echo $implied $* $parent`"
657 test -n "$sysnames" && set $sysnames
658 done
660 # Add the default directories.
661 default_sysnames=sysdeps/generic
662 if test "$elf" = yes; then
663 default_sysnames="sysdeps/generic/elf $default_sysnames"
664 fi
665 sysnames="$names $default_sysnames"
666 AC_SUBST(sysnames)
667 # The other names were emitted during the scan.
668 AC_MSG_RESULT($default_sysnames)
671 ### Locate tools.
673 AC_PROG_INSTALL
674 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
675 # The makefiles need to use a different form to find it in $srcdir.
676 INSTALL='\$(..)./scripts/install-sh -c'
677 fi
678 AC_PROG_LN_S
680 AC_PROG_CC
681 if test $host != $build; then
682 AC_CHECK_PROGS(BUILD_CC, gcc cc)
683 fi
684 AC_SUBST(cross_compiling)
685 AC_PROG_CPP
686 # We need the C++ compiler only for testing.
687 AC_PROG_CXX
688 LIBC_PROG_BINUTILS
689 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
691 # Accept binutils 2.13 or newer.
692 AC_CHECK_PROG_VER(AS, $AS, --version,
693 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
694 [2.1[3-9]*], AS=: critic_missing="$critic_missing as")
695 AC_CHECK_PROG_VER(LD, $LD, --version,
696 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
697 [2.1[3-9]*], LD=: critic_missing="$critic_missing ld")
699 # We need the physical current working directory. We cannot use the
700 # "pwd -P" shell builtin since that's not portable. Instead we try to
701 # find a pwd binary. Note that assigning to the PWD environment
702 # variable might have some interesting side effects, so we don't do
703 # that.
704 AC_PATH_PROG(PWD_P, pwd, no)
705 if test "$PWD_P" = no; then
706 AC_MSG_ERROR(*** A pwd binary could not be found.)
707 fi
709 # These programs are version sensitive.
710 AC_CHECK_TOOL_PREFIX
711 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
712 [version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]*],
713 critic_missing="$critic_missing gcc")
714 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
715 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
716 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
718 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
719 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
720 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
721 MSGFMT=: aux_missing="$aux_missing msgfmt")
722 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
723 [GNU texinfo.* \([0-9][0-9.]*\)],
724 [4.*],
725 MAKEINFO=: aux_missing="$aux_missing makeinfo")
726 AC_CHECK_PROG_VER(SED, sed, --version,
727 [GNU sed version \([0-9]*\.[0-9.]*\)],
728 [3.0[2-9]*|3.[1-9]*|[4-9]*],
729 SED=: aux_missing="$aux_missing sed")
731 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
732 case "x$AUTOCONF" in
733 xno|x|x:) AUTOCONF=no ;;
734 *)
735 AC_CACHE_CHECK(dnl
736 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
737 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
738 libc_cv_autoconf_works=yes
739 else
740 libc_cv_autoconf_works=no
741 fi])
742 test $libc_cv_autoconf_works = yes || AUTOCONF=no
743 ;;
744 esac
745 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
746 # If --without-cvs they probably won't change configure.in, so no complaints.
747 aux_missing="$aux_missing autoconf"
748 fi
750 test -n "$critic_missing" && AC_MSG_ERROR([
751 *** These critical programs are missing or too old:$critic_missing
752 *** Check the INSTALL file for required versions.])
754 test -n "$aux_missing" && AC_MSG_WARN([
755 *** These auxiliary programs are missing or incompatible versions:$aux_missing
756 *** some features will be disabled.
757 *** Check the INSTALL file for required versions.])
759 # if using special system headers, find out the compiler's sekrit
760 # header directory and add that to the list. NOTE: Only does the right
761 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
762 if test -n "$sysheaders"; then
763 ccheaders=`$CC -print-file-name=include`
764 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
765 fi
766 AC_SUBST(SYSINCLUDES)
768 # check if ranlib is necessary
769 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
770 cat > conftest.c <<EOF
771 int a;
772 char b;
773 void c(void) {}
774 EOF
775 $CC $CFLAGS $CPPFLAGS -c conftest.c
776 $AR cr conftest.a conftest.o
777 cp conftest.a conftest2.a
778 $RANLIB conftest.a
779 if cmp -s conftest.a conftest2.a; then
780 libc_cv_ranlib_necessary=no
781 else
782 libc_cv_ranlib_necessary=yes
783 fi
784 rm -rf conftest*])
785 if test "$libc_cv_ranlib_necessary" = no; then
786 RANLIB=:
787 fi
789 # Test if LD_LIBRARY_PATH contains the notation for the current directory
790 # since this would lead to problems installing/building glibc.
791 # LD_LIBRARY_PATH contains the current directory if one of the following
792 # is true:
793 # - one of the terminals (":" and ";") is the first or last sign
794 # - two terminals occur directly after each other
795 # - the path contains an element with a dot in it
796 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
797 changequote(,)dnl
798 case ${LD_LIBRARY_PATH} in
799 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
800 ld_library_path_setting="contains current directory"
801 ;;
802 *)
803 ld_library_path_setting="ok"
804 ;;
805 esac
806 changequote([,])dnl
807 AC_MSG_RESULT($ld_library_path_setting)
808 if test "$ld_library_path_setting" != "ok"; then
809 AC_MSG_ERROR([
810 *** LD_LIBRARY_PATH shouldn't contain the current directory when
811 *** building glibc. Please change the environment variable
812 *** and run configure again.])
813 fi
815 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
816 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
817 libc_cv_gcc_static_libgcc=
818 else
819 libc_cv_gcc_static_libgcc=-static-libgcc
820 fi])
821 AC_SUBST(libc_cv_gcc_static_libgcc)
823 AC_PATH_PROG(BASH, bash, no)
824 if test "$BASH" != no &&
825 $BASH -c 'test "$BASH_VERSINFO" \
826 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
827 libc_cv_have_bash2=yes
828 else
829 libc_cv_have_bash2=no
830 fi
831 AC_SUBST(libc_cv_have_bash2)
833 dnl We need a ksh compatible shell for tzselect.
834 if test "$BASH" = no; then
835 AC_PATH_PROG(KSH, ksh, no)
836 if test "$KSH" = no; then
837 libc_cv_have_ksh=no
838 else
839 libc_cv_have_ksh=yes
840 fi
841 else
842 KSH="$BASH"
843 AC_SUBST(KSH)
844 libc_cv_have_ksh=yes
845 fi
846 AC_SUBST(libc_cv_have_ksh)
848 AC_PROG_AWK
849 AC_PATH_PROG(PERL, perl, no)
850 if test "$PERL" != no &&
851 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
852 PERL=no
853 fi
854 AC_PATH_PROG(INSTALL_INFO, install-info, no,
855 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
856 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
858 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
859 echo '#include <stddef.h>
860 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
861 if eval "$ac_cpp conftest.c 2>/dev/null" \
862 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
863 libc_cv_signed_size_t=no
864 else
865 libc_cv_signed_size_t=yes
866 fi
867 rm -f conftest*])
868 if test $libc_cv_signed_size_t = yes; then
869 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
870 cat >> confdefs.h <<\EOF
871 #undef __SIZE_TYPE__
872 #define __SIZE_TYPE__ unsigned
873 EOF
874 fi
876 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
877 AC_TRY_COMPILE(dnl
878 [#define __need_size_t
879 #define __need_wchar_t
880 #include <stddef.h>
881 #define __need_NULL
882 #include <stddef.h>], [size_t size; wchar_t wchar;
883 #ifdef offsetof
884 #error stddef.h ignored __need_*
885 #endif
886 if (&size == NULL || &wchar == NULL) abort ();],
887 libc_cv_friendly_stddef=yes,
888 libc_cv_friendly_stddef=no)])
889 if test $libc_cv_friendly_stddef = yes; then
890 config_vars="$config_vars
891 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
892 fi
894 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
895 libc_cv_need_minus_P, [dnl
896 cat > conftest.S <<EOF
897 #include "confdefs.h"
898 /* Nothing whatsoever. */
899 EOF
900 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
901 libc_cv_need_minus_P=no
902 else
903 libc_cv_need_minus_P=yes
904 fi
905 rm -f conftest*])
906 if test $libc_cv_need_minus_P = yes; then
907 config_vars="$config_vars
908 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
909 fi
911 AC_MSG_CHECKING(whether .text pseudo-op must be used)
912 AC_CACHE_VAL(libc_cv_dot_text, [dnl
913 cat > conftest.s <<EOF
914 .text
915 EOF
916 libc_cv_dot_text=
917 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
918 libc_cv_dot_text=.text
919 fi
920 rm -f conftest*])
921 if test -z "$libc_cv_dot_text"; then
922 AC_MSG_RESULT(no)
923 else
924 AC_MSG_RESULT(yes)
925 fi
927 AC_CACHE_CHECK(for assembler global-symbol directive,
928 libc_cv_asm_global_directive, [dnl
929 libc_cv_asm_global_directive=UNKNOWN
930 for ac_globl in .globl .global .EXPORT; do
931 cat > conftest.s <<EOF
932 ${libc_cv_dot_text}
933 ${ac_globl} foo
934 foo:
935 EOF
936 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
937 libc_cv_asm_global_directive=${ac_globl}
938 fi
939 rm -f conftest*
940 test $libc_cv_asm_global_directive != UNKNOWN && break
941 done])
942 if test $libc_cv_asm_global_directive = UNKNOWN; then
943 AC_MSG_ERROR(cannot determine asm global directive)
944 else
945 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
946 fi
948 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
949 cat > conftest.s <<EOF
950 ${libc_cv_dot_text}
951 foo:
952 .set glibc_conftest_frobozz,foo
953 $libc_cv_asm_global_directive glibc_conftest_frobozz
954 EOF
955 # The alpha-dec-osf1 assembler gives only a warning for `.set'
956 # (but it doesn't work), so we must do a linking check to be sure.
957 cat > conftest1.c <<\EOF
958 extern int glibc_conftest_frobozz;
959 void _start() { glibc_conftest_frobozz = 1; }
960 EOF
961 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
962 -nostartfiles -nostdlib \
963 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
964 libc_cv_asm_set_directive=yes
965 else
966 libc_cv_asm_set_directive=no
967 fi
968 rm -f conftest*])
969 if test $libc_cv_asm_set_directive = yes; then
970 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
971 fi
973 AC_CACHE_CHECK(for assembler .type directive prefix,
974 libc_cv_asm_type_prefix, [dnl
975 libc_cv_asm_type_prefix=no
976 for ac_try_prefix in '@' '%' '#'; do
977 cat > conftest.s <<EOF
978 ${libc_cv_dot_text}
979 ${libc_cv_asm_global_directive} foo
980 .type foo, ${ac_try_prefix}object
981 .size foo, 1
982 foo:
983 .byte 1
984 EOF
985 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
986 libc_cv_asm_type_prefix=${ac_try_prefix}
987 fi
988 rm -f conftest*
989 test "x$libc_cv_asm_type_prefix" != xno && break
990 done])
991 if test "x$libc_cv_asm_type_prefix" != xno; then
992 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
993 fi
995 # The Aix ld uses global .symbol_names instead of symbol_names.
996 # Unfortunately also used in the PPC64 ELF ABI.
997 case "${os}${machine}" in
998 aix4.3* | linux*powerpc/powerpc64*)
999 AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
1000 esac
1002 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1003 [cat > conftest.s <<EOF
1004 ${libc_cv_dot_text}
1005 _sym:
1006 .symver _sym,sym@VERS
1007 EOF
1008 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1009 libc_cv_asm_symver_directive=yes
1010 else
1011 libc_cv_asm_symver_directive=no
1012 fi
1013 rm -f conftest*])
1014 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1015 if test $libc_cv_asm_symver_directive = yes; then
1016 cat > conftest.s <<EOF
1017 ${libc_cv_dot_text}
1018 _sym:
1019 .symver _sym,sym@VERS
1020 EOF
1021 cat > conftest.map <<EOF
1022 VERS_1 {
1023 global: sym;
1024 };
1026 VERS_2 {
1027 global: sym;
1028 } VERS_1;
1029 EOF
1030 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1031 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1032 -o conftest.so conftest.o
1033 -nostartfiles -nostdlib
1034 -Wl,--version-script,conftest.map
1035 1>&AS_MESSAGE_LOG_FD]);
1036 then
1037 libc_cv_ld_version_script_option=yes
1038 else
1039 libc_cv_ld_version_script_option=no
1040 fi
1041 else
1042 libc_cv_ld_version_script_option=no
1043 fi
1044 else
1045 libc_cv_ld_version_script_option=no
1046 fi
1047 rm -f conftest*])
1048 if test $shared != no &&
1049 test $libc_cv_asm_symver_directive = yes &&
1050 test $libc_cv_ld_version_script_option = yes &&
1051 test $enable_versioning = yes; then
1052 VERSIONING=yes
1053 AC_DEFINE(DO_VERSIONING)
1054 else
1055 VERSIONING=no
1056 fi
1057 AC_SUBST(VERSIONING)
1059 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1060 echo "\
1061 *** WARNING: You should not compile GNU libc without versioning. Not using
1062 *** versioning will introduce incompatibilities so that old binaries
1063 *** will not run anymore.
1064 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1065 fi
1066 if test $elf = yes; then
1067 AC_CACHE_CHECK(for .previous assembler directive,
1068 libc_cv_asm_previous_directive, [dnl
1069 cat > conftest.s <<EOF
1070 .section foo_section
1071 .previous
1072 EOF
1073 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1074 libc_cv_asm_previous_directive=yes
1075 else
1076 libc_cv_asm_previous_directive=no
1077 fi
1078 rm -f conftest*])
1079 if test $libc_cv_asm_previous_directive = yes; then
1080 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1081 else
1082 AC_CACHE_CHECK(for .popsection assembler directive,
1083 libc_cv_asm_popsection_directive, [dnl
1084 cat > conftest.s <<EOF
1085 .pushsection foo_section
1086 .popsection
1087 EOF
1088 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1089 libc_cv_asm_popsection_directive=yes
1090 else
1091 libc_cv_asm_popsection_directive=no
1092 fi
1093 rm -f conftest*])
1094 if test $libc_cv_asm_popsection_directive = yes; then
1095 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1096 fi
1097 fi
1098 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1099 libc_cv_asm_protected_directive, [dnl
1100 cat > conftest.s <<EOF
1101 .protected foo
1102 foo:
1103 .hidden bar
1104 bar:
1105 EOF
1106 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1107 libc_cv_asm_protected_directive=yes
1108 else
1109 libc_cv_asm_protected_directive=no
1110 fi
1111 rm -f conftest*])
1112 AC_SUBST(libc_cv_asm_protected_directive)
1113 AC_DEFINE(HAVE_PROTECTED)
1114 AC_DEFINE(HAVE_HIDDEN)
1116 if test $libc_cv_asm_protected_directive = yes; then
1117 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1118 libc_cv_visibility_attribute,
1119 [cat > conftest.c <<EOF
1120 int foo __attribute__ ((visibility ("hidden"))) = 1;
1121 int bar __attribute__ ((visibility ("protected"))) = 1;
1122 EOF
1123 libc_cv_visibility_attribute=no
1124 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1125 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1126 if grep '\.protected.*bar' conftest.s >/dev/null; then
1127 libc_cv_visibility_attribute=yes
1128 fi
1129 fi
1130 fi
1131 rm -f conftest.[cs]
1132 ])
1133 if test $libc_cv_visibility_attribute = yes; then
1134 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1135 fi
1136 fi
1138 if test $libc_cv_visibility_attribute = yes; then
1139 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1140 libc_cv_broken_visibility_attribute,
1141 [cat > conftest.c <<EOF
1142 int foo (int x);
1143 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1144 int bar (int x) { return x; }
1145 EOF
1146 libc_cv_broken_visibility_attribute=yes
1147 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
1148 changequote(,)dnl
1149 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1150 changequote([,])dnl
1151 libc_cv_broken_visibility_attribute=no
1152 fi
1153 fi
1154 rm -f conftest.c conftest.s
1155 ])
1156 if test $libc_cv_broken_visibility_attribute = yes; then
1157 AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
1158 fi
1159 fi
1161 AC_CACHE_CHECK(for broken __attribute__((alias())),
1162 libc_cv_broken_alias_attribute,
1163 [cat > conftest.c <<EOF
1164 extern int foo (int x) __asm ("xyzzy");
1165 int bar (int x) { return x; }
1166 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1167 extern int dfoo;
1168 extern __typeof (dfoo) dfoo __asm ("abccb");
1169 int dfoo = 1;
1170 EOF
1171 libc_cv_broken_alias_attribute=yes
1172 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1173 if grep 'xyzzy' conftest.s >/dev/null &&
1174 grep 'abccb' conftest.s >/dev/null; then
1175 libc_cv_broken_alias_attribute=no
1176 fi
1177 fi
1178 rm -f conftest.c conftest.s
1179 ])
1180 if test $libc_cv_broken_alias_attribute = yes; then
1181 AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
1182 fi
1184 if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
1185 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1186 libc_cv_have_sdata_section,
1187 [echo "int i;" > conftest.c
1188 libc_cv_have_sdata_section=no
1189 if ${CC-cc} $LDFLAGS -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1190 | grep '\.sdata' >/dev/null; then
1191 libc_cv_have_sdata_section=yes
1192 fi
1193 rm -f conftest.c conftest.so
1194 ])
1195 if test $libc_cv_have_sdata_section = yes; then
1196 AC_DEFINE(HAVE_SDATA_SECTION)
1197 fi
1198 fi
1200 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1201 libc_cv_initfinit_array, [dnl
1202 cat > conftest.c <<EOF
1203 int _start (void) { return 0; }
1204 int __start (void) { return 0; }
1205 int foo (void) { return 1; }
1206 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1207 EOF
1208 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1209 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1210 then
1211 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1212 libc_cv_initfinit_array=yes
1213 else
1214 libc_cv_initfinit_array=no
1215 fi
1216 else
1217 libc_cv_initfinit_array=no
1218 fi
1219 rm -f conftest*])
1220 AC_SUBST(libc_cv_initfinit_array)
1221 if test $libc_cv_initfinit_array = yes; then
1222 AC_DEFINE(HAVE_INITFINI_ARRAY)
1223 fi
1225 AC_CACHE_CHECK(for libunwind-support in compiler,
1226 libc_cv_cc_with_libunwind, [dnl
1227 AC_TRY_LINK([#include <libunwind.h>], [
1228 unw_context_t uc;
1229 unw_cursor_t c;
1230 unw_getcontext (&uc);
1231 unw_init_local (&c, &uc)],
1232 libc_cv_cc_with_libunwind=yes, libc_cv_cc_with_libunwind=no)])
1233 AC_SUBST(libc_cv_cc_with_libunwind)
1234 if test $libc_cv_cc_with_libunwind = yes; then
1235 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1236 fi
1238 AC_CACHE_CHECK(for -z nodelete option,
1239 libc_cv_z_nodelete, [dnl
1240 cat > conftest.c <<EOF
1241 int _start (void) { return 42; }
1242 EOF
1243 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1244 -shared -o conftest.so conftest.c
1245 -nostartfiles -nostdlib
1246 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1247 then
1248 libc_cv_z_nodelete=yes
1249 else
1250 libc_cv_z_nodelete=no
1251 fi
1252 rm -f conftest*])
1253 AC_SUBST(libc_cv_z_nodelete)
1255 AC_CACHE_CHECK(for -z nodlopen option,
1256 libc_cv_z_nodlopen, [dnl
1257 cat > conftest.c <<EOF
1258 int _start (void) { return 42; }
1259 EOF
1260 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1261 -shared -o conftest.so conftest.c
1262 -nostartfiles -nostdlib
1263 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1264 then
1265 libc_cv_z_nodlopen=yes
1266 else
1267 libc_cv_z_nodlopen=no
1268 fi
1269 rm -f conftest*])
1270 AC_SUBST(libc_cv_z_nodlopen)
1272 AC_CACHE_CHECK(for -z initfirst option,
1273 libc_cv_z_initfirst, [dnl
1274 cat > conftest.c <<EOF
1275 int _start (void) { return 42; }
1276 EOF
1277 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1278 -shared -o conftest.so conftest.c
1279 -nostartfiles -nostdlib
1280 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1281 then
1282 libc_cv_z_initfirst=yes
1283 else
1284 libc_cv_z_initfirst=no
1285 fi
1286 rm -f conftest*])
1287 AC_SUBST(libc_cv_z_initfirst)
1289 AC_CACHE_CHECK(for -z relro option,
1290 libc_cv_z_relro, [dnl
1291 if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
1292 then
1293 libc_cv_z_relro=yes
1294 else
1295 libc_cv_z_relro=no
1296 fi])
1297 AC_SUBST(libc_cv_z_relro)
1298 if test $libc_cv_z_relro = yes; then
1299 AC_DEFINE(HAVE_Z_RELRO)
1300 fi
1302 AC_CACHE_CHECK(for -Bgroup option,
1303 libc_cv_Bgroup, [dnl
1304 cat > conftest.c <<EOF
1305 int _start (void) { return 42; }
1306 EOF
1307 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1308 -shared -o conftest.so conftest.c
1309 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1310 then
1311 libc_cv_Bgroup=yes
1312 else
1313 libc_cv_Bgroup=no
1314 fi
1315 rm -f conftest*])
1316 AC_SUBST(libc_cv_Bgroup)
1318 ASFLAGS_config=
1319 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1320 libc_cv_as_noexecstack, [dnl
1321 cat > conftest.c <<EOF
1322 void foo (void) { }
1323 EOF
1324 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1325 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1326 && grep -q .note.GNU-stack conftest.s \
1327 && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wa,--noexecstack
1328 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1329 then
1330 libc_cv_as_noexecstack=yes
1331 else
1332 libc_cv_as_noexecstack=no
1333 fi
1334 rm -f conftest*])
1335 if test $libc_cv_as_noexecstack = yes; then
1336 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1337 fi
1338 AC_SUBST(ASFLAGS_config)
1340 AC_CACHE_CHECK(for -z combreloc,
1341 libc_cv_z_combreloc, [dnl
1342 cat > conftest.c <<EOF
1343 extern int bar (int);
1344 extern int mumble;
1345 int foo (void) { return bar (mumble); }
1346 EOF
1347 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1348 -shared -o conftest.so conftest.c
1349 -nostdlib -nostartfiles
1350 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1351 then
1352 dnl The following test is a bit weak. We must use a tool which can test
1353 dnl cross-platform since the gcc used can be a cross compiler. Without
1354 dnl introducing new options this is not easily doable. Instead use a tool
1355 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1356 dnl look for a section named .rel.dyn.
1357 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1358 libc_cv_z_combreloc=yes
1359 else
1360 libc_cv_z_combreloc=no
1361 fi
1362 else
1363 libc_cv_z_combreloc=no
1364 fi
1365 rm -f conftest*])
1366 if test "$libc_cv_z_combreloc" = yes; then
1367 AC_DEFINE(HAVE_Z_COMBRELOC)
1368 fi
1369 AC_SUBST(libc_cv_z_combreloc)
1371 AC_CACHE_CHECK(for -z execstack,
1372 libc_cv_z_execstack, [dnl
1373 cat > conftest.c <<EOF
1374 int _start (void) { return 42; }
1375 EOF
1376 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1377 -shared -o conftest.so conftest.c
1378 -Wl,-z,execstack -nostdlib
1379 1>&AS_MESSAGE_LOG_FD])
1380 then
1381 libc_cv_z_execstack=yes
1382 else
1383 libc_cv_z_execstack=no
1384 fi
1385 rm -f conftest*])
1386 AC_SUBST(libc_cv_z_execstack)
1388 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1389 cat > conftest.c <<EOF
1390 int foo;
1391 main () { return 0;}
1392 EOF
1393 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1394 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1395 then
1396 libc_cv_fpie=yes
1397 else
1398 libc_cv_fpie=no
1399 fi
1400 rm -f conftest*])
1402 AC_SUBST(libc_cv_fpie)
1403 fi
1405 AC_CACHE_CHECK(for -fno-unit-at-a-time, libc_cv_fno_unit_at_a_time, [dnl
1406 cat > conftest.c <<EOF
1407 int foo;
1408 EOF
1409 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-unit-at-a-time
1410 conftest.c 1>&AS_MESSAGE_LOG_FD])
1411 then
1412 libc_cv_fno_unit_at_a_time=yes
1413 else
1414 libc_cv_fno_unit_at_a_time=no
1415 fi
1416 rm -f conftest*])
1417 if test $libc_cv_fno_unit_at_a_time = yes; then
1418 fno_unit_at_a_time=-fno-unit-at-a-time
1419 fi
1420 AC_SUBST(fno_unit_at_a_time)
1422 if test $elf != yes; then
1423 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1424 [AC_TRY_COMPILE(, [asm (".section .init");
1425 asm (".section .fini");
1426 asm ("${libc_cv_dot_text}");],
1427 libc_cv_have_initfini=yes,
1428 libc_cv_have_initfini=no)])
1429 AC_SUBST(libc_cv_have_initfini)dnl
1430 if test $libc_cv_have_initfini = yes; then
1431 AC_DEFINE(HAVE_INITFINI)
1432 fi
1433 fi
1435 if test $elf = yes -a $gnu_ld = yes; then
1436 AC_CACHE_CHECK(whether cc puts quotes around section names,
1437 libc_cv_have_section_quotes,
1438 [cat > conftest.c <<EOF
1439 static const int foo
1440 __attribute__ ((section ("bar"))) = 1;
1441 EOF
1442 if ${CC-cc} -S conftest.c -o conftest.s; then
1443 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1444 libc_cv_have_section_quotes=yes
1445 else
1446 libc_cv_have_section_quotes=no
1447 fi
1448 else
1449 libc_cv_have_section_quotes=unknown
1450 fi
1451 rm -f conftest.[cs]
1452 ])
1453 if test $libc_cv_have_section_quotes = yes; then
1454 AC_DEFINE(HAVE_SECTION_QUOTES)
1455 fi
1456 fi
1458 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1459 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1460 [cat > conftest.$ac_ext <<EOF
1461 dnl This sometimes fails to find confdefs.h, for some reason.
1462 dnl [#]line $LINENO "[$]0"
1463 [#]line $LINENO "configure"
1464 #include "confdefs.h"
1465 void underscore_test(void) {
1466 return; }
1467 EOF
1468 if AC_TRY_EVAL(ac_compile); then
1469 if grep _underscore_test conftest* >/dev/null; then
1470 ifelse([$1], , :, [rm -f conftest*
1471 $1])
1472 else
1473 ifelse([$2], , , [rm -f conftest*
1474 $2])
1475 fi
1476 else
1477 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1478 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1479 ifelse([$2], , , [rm -f conftest*
1480 $2])
1481 fi
1482 rm -f conftest*])
1484 if test $elf = yes; then
1485 libc_cv_asm_underscores=no
1486 else
1487 if test $ac_cv_prog_cc_works = yes; then
1488 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1489 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1490 libc_cv_asm_underscores=yes,
1491 libc_cv_asm_underscores=no)])
1492 else
1493 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1494 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1495 libc_cv_asm_underscores=no)])
1496 fi
1497 fi
1498 if test $libc_cv_asm_underscores = no; then
1499 AC_DEFINE(NO_UNDERSCORES)
1500 fi
1502 if test $elf = yes; then
1503 libc_cv_weak_symbols=yes
1504 fi
1506 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1507 [dnl
1508 cat > conftest.s <<EOF
1509 ${libc_cv_dot_text}
1510 ${libc_cv_asm_global_directive} foo
1511 foo:
1512 .weak foo
1513 .weak bar; bar = foo
1514 EOF
1515 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1516 libc_cv_asm_weak_directive=yes
1517 else
1518 libc_cv_asm_weak_directive=no
1519 fi
1520 rm -f conftest*])
1522 if test $libc_cv_asm_weak_directive = no; then
1523 AC_CACHE_CHECK(for assembler .weakext directive,
1524 libc_cv_asm_weakext_directive,
1525 [dnl
1526 cat > conftest.s <<EOF
1527 ${libc_cv_dot_text}
1528 ${libc_cv_asm_global_directive} foo
1529 foo:
1530 .weakext bar foo
1531 .weakext baz
1532 ${libc_cv_asm_global_directive} baz
1533 baz:
1534 EOF
1535 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1536 libc_cv_asm_weakext_directive=yes
1537 else
1538 libc_cv_asm_weakext_directive=no
1539 fi
1540 rm -f conftest*])
1542 fi # no .weak
1544 if test $libc_cv_asm_weak_directive = yes; then
1545 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1546 elif test $libc_cv_asm_weakext_directive = yes; then
1547 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1548 fi
1550 dnl The standard hppa assembler uses `;' to start comments and `!'
1551 dnl as a line separator. CRIS uses `;' to start comments and `@' for
1552 dnl line separator.
1553 case "${host_cpu}-${host_os}" in
1554 cris*)
1555 libc_cv_asm_line_sep='@'
1556 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1557 ;;
1558 hppa*linux*)
1559 AC_CACHE_CHECK(for assembler line separator,
1560 libc_cv_asm_line_sep, [dnl
1561 cat > conftest.s <<EOF
1562 nop ; is_old_puffin
1563 EOF
1564 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1565 libc_cv_asm_line_sep='!'
1566 else
1567 if test -z "$enable_hacker_mode"; then
1568 echo "*** You need a newer assembler to compile glibc"
1569 rm -f conftest*
1570 exit 1
1571 fi
1572 libc_cv_asm_line_sep=';'
1573 fi
1574 rm -f conftest*])
1575 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1576 ;;
1577 esac
1579 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1580 cat > conftest.s <<EOF
1581 .text
1582 .type func,@function
1583 func:
1584 .cfi_startproc
1585 .cfi_remember_state
1586 .cfi_rel_offset 1, 0
1587 .cfi_endproc
1588 EOF
1589 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1590 libc_cv_asm_cfi_directives=yes
1591 else
1592 libc_cv_asm_cfi_directives=no
1593 fi
1594 rm -f conftest*])
1595 if test $libc_cv_asm_cfi_directives = yes; then
1596 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1597 fi
1599 AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
1600 libc_cv_cpp_asm_debuginfo, [dnl
1601 cat > conftest.S <<EOF
1602 #include "confdefs.h"
1604 /* comment on
1605 two lines */
1606 ${libc_cv_dot_text}
1607 ${libc_cv_asm_global_directive} foo
1608 foo:
1609 /* Unfortunately this test only works for a real instruction,
1610 not for any of the machine-independent pseudo-ops.
1611 So we just have to assume everybody has a "nop". */
1612 nop
1613 /* comment */
1614 nop
1615 /* comment */
1616 nop
1617 EOF
1618 if AC_TRY_COMMAND([${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) &&
1619 ac_pattern='conftest\.S'
1620 AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
1621 grep $ac_pattern 1>&AS_MESSAGE_LOG_FD]); then
1622 libc_cv_cpp_asm_debuginfo=yes
1623 else
1624 libc_cv_cpp_asm_debuginfo=no
1625 fi
1626 rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
1627 if test $libc_cv_cpp_asm_debuginfo = yes; then
1628 AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
1629 fi
1631 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1632 cat > conftest.c <<\EOF
1633 _start () {}
1634 int __eh_pc;
1635 __throw () {}
1636 EOF
1637 dnl No \ in command here because it ends up inside ''.
1638 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1639 -nostdlib -nostartfiles -Wl,--no-whole-archive
1640 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1641 libc_cv_ld_no_whole_archive=yes
1642 else
1643 libc_cv_ld_no_whole_archive=no
1644 fi
1645 rm -f conftest*])
1646 if test $libc_cv_ld_no_whole_archive = yes; then
1647 no_whole_archive=-Wl,--no-whole-archive
1648 fi
1649 AC_SUBST(no_whole_archive)dnl
1651 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1652 cat > conftest.c <<\EOF
1653 _start () {}
1654 int __eh_pc;
1655 __throw () {}
1656 EOF
1657 dnl No \ in command here because it ends up inside ''.
1658 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1659 -nostdlib -nostartfiles -fexceptions
1660 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1661 libc_cv_gcc_exceptions=yes
1662 else
1663 libc_cv_gcc_exceptions=no
1664 fi
1665 rm -f conftest*])
1666 if test $libc_cv_gcc_exceptions = yes; then
1667 exceptions=-fexceptions
1668 fi
1669 AC_SUBST(exceptions)dnl
1671 if test "$host_cpu" = powerpc ; then
1672 # Check for a bug present in at least versions 2.8.x of GCC
1673 # and versions 1.0.x of EGCS.
1674 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1675 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1676 libc_cv_c_asmcr0_bug='no',
1677 libc_cv_c_asmcr0_bug='yes')])
1678 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1679 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1680 fi
1681 fi
1683 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1684 [cat > conftest.c <<EOF
1685 #line $LINENO "configure"
1686 static char *__EH_FRAME_BEGIN__;
1687 _start ()
1688 {
1689 #ifdef CHECK__register_frame
1690 __register_frame (__EH_FRAME_BEGIN__);
1691 __deregister_frame (__EH_FRAME_BEGIN__);
1692 #endif
1693 #ifdef CHECK__register_frame_info
1694 __register_frame_info (__EH_FRAME_BEGIN__);
1695 __deregister_frame_info (__EH_FRAME_BEGIN__);
1696 #endif
1697 }
1698 int __eh_pc;
1699 __throw () {}
1700 /* FIXME: this is fragile. */
1701 malloc () {}
1702 strcmp () {}
1703 strlen () {}
1704 memcpy () {}
1705 memset () {}
1706 free () {}
1707 abort () {}
1708 __bzero () {}
1709 dl_iterate_phdr () {}
1710 EOF
1711 libc_unwind_check="${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame_info \
1712 $LDFLAGS \
1713 -nostdlib -nostartfiles -o conftest conftest.c \
1714 -lgcc"
1715 # Some platforms' specs put -lgcc first. The second one doesn't hurt.
1716 if AC_TRY_COMMAND([$libc_unwind_check >&AS_MESSAGE_LOG_FD]) ||
1717 AC_TRY_COMMAND([$libc_unwind_check -lgcc_eh -lgcc >&AS_MESSAGE_LOG_FD])
1718 then
1719 if $libc_unwind_check -v 2>&1 >/dev/null \
1720 | grep -- --eh-frame-hdr 2>&1 >/dev/null; then
1721 libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
1722 else
1723 libc_cv_gcc_dwarf2_unwind_info=static
1724 fi
1725 else
1726 libc_cv_gcc_dwarf2_unwind_info=no
1727 fi
1728 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1729 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame
1730 $LDFLAGS -nostdlib -nostartfiles
1731 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1732 libc_cv_gcc_dwarf2_unwind_info=yes
1733 else
1734 libc_cv_gcc_dwarf2_unwind_info=no
1735 fi
1736 fi
1737 rm -f conftest*])
1738 case $libc_cv_gcc_dwarf2_unwind_info in
1739 yes)
1740 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1741 ;;
1742 static)
1743 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1744 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1745 ;;
1746 esac
1748 dnl Check whether compiler understands __builtin_expect.
1749 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1750 [cat > conftest.c <<EOF
1751 #line $LINENO "configure"
1752 int foo (int a)
1753 {
1754 a = __builtin_expect (a, 10);
1755 return a == 10 ? 0 : 1;
1756 }
1757 EOF
1758 dnl No \ in command here because it ends up inside ''.
1759 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1760 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1761 libc_cv_gcc_builtin_expect=yes
1762 else
1763 libc_cv_gcc_builtin_expect=no
1764 fi
1765 rm -f conftest*])
1766 if test "$libc_cv_gcc_builtin_expect" = yes; then
1767 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1768 fi
1770 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1771 cat > conftest.c <<\EOF
1772 void zero (void *x)
1773 {
1774 __builtin_memset (x, 0, 1000);
1775 }
1776 EOF
1777 dnl
1778 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1779 then
1780 libc_cv_gcc_builtin_memset=no
1781 else
1782 libc_cv_gcc_builtin_memset=yes
1783 fi
1784 rm -f conftest* ])
1785 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1786 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1787 fi
1789 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1790 cat > conftest.c <<\EOF
1791 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1792 char *foo (const char *a, const char *b)
1793 {
1794 return __builtin_strstr (a, b);
1795 }
1796 EOF
1797 dnl
1798 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1799 then
1800 libc_cv_gcc_builtin_redirection=yes
1801 else
1802 libc_cv_gcc_builtin_redirection=no
1803 fi
1804 rm -f conftest* ])
1805 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
1806 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
1807 fi
1809 dnl Check whether the compiler supports subtraction of local labels.
1810 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1811 [cat > conftest.c <<EOF
1812 changequote(,)dnl
1813 #line $LINENO "configure"
1814 int foo (int a)
1815 {
1816 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1817 void *p = &&l1 + ar[a];
1818 goto *p;
1819 l1:
1820 return 1;
1821 l2:
1822 return 2;
1823 }
1824 changequote([,])dnl
1825 EOF
1826 dnl No \ in command here because it ends up inside ''.
1827 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1828 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1829 libc_cv_gcc_subtract_local_labels=yes
1830 else
1831 libc_cv_gcc_subtract_local_labels=no
1832 fi
1833 rm -f conftest*])
1834 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1835 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1836 fi
1838 dnl Check whether the compiler supports the __thread keyword.
1839 if test "x$use__thread" != xno; then
1840 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1841 [cat > conftest.c <<\EOF
1842 __thread int a = 42;
1843 EOF
1844 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1845 libc_cv_gcc___thread=yes
1846 else
1847 libc_cv_gcc___thread=no
1848 fi
1849 rm -f conftest*])
1850 if test "$libc_cv_gcc___thread" = yes; then
1851 AC_DEFINE(HAVE___THREAD)
1852 fi
1853 else
1854 libc_cv_gcc___thread=no
1855 fi
1857 if test "$libc_cv_gcc___thread" = yes; then
1858 dnl Check whether the compiler supports the tls_model attribute.
1859 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1860 cat > conftest.c <<\EOF
1861 extern __thread int a __attribute__((tls_model ("initial-exec")));
1862 EOF
1863 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1864 libc_cv_gcc_tls_model_attr=yes
1865 else
1866 libc_cv_gcc_tls_model_attr=no
1867 fi
1868 rm -f conftest*])
1869 if test "$libc_cv_gcc_tls_model_attr" = yes; then
1870 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
1871 fi
1872 fi
1874 dnl Check whether we have the gd library available.
1875 AC_MSG_CHECKING(for libgd)
1876 if test "$with_gd" != "no"; then
1877 old_CFLAGS="$CFLAGS"
1878 CFLAGS="$CFLAGS $libgd_include"
1879 old_LDFLAGS="$LDFLAGS"
1880 LDFLAGS="$LDFLAGS $libgd_ldflags"
1881 old_LIBS="$LIBS"
1882 LIBS="$LIBS -lgd -lpng -lz -lm"
1883 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1884 CFLAGS="$old_CFLAGS"
1885 LDFLAGS="$old_LDFLAGS"
1886 LIBS="$old_LIBS"
1887 else
1888 LIBGD=no
1889 fi
1890 AC_MSG_RESULT($LIBGD)
1891 AC_SUBST(LIBGD)
1893 dnl check for the size of 'long double'.
1894 AC_CHECK_SIZEOF(long double, 0)
1895 sizeof_long_double=$ac_cv_sizeof_long_double
1896 AC_SUBST(sizeof_long_double)
1898 ### End of automated tests.
1899 ### Now run sysdeps configure fragments.
1901 # They also can set these variables.
1902 use_ldconfig=no
1903 ldd_rewrite_script=no
1904 libc_cv_sysconfdir=$sysconfdir
1905 libc_cv_gcc_unwind_find_fde=no
1906 libc_cv_idn=no
1908 # Iterate over all the sysdep directories we will use, running their
1909 # configure fragments, and looking for a uname implementation.
1910 uname=
1911 for dir in $sysnames; do
1912 case $dir in
1913 /*) dest=$dir ;;
1914 *) dest=$srcdir/$dir ;;
1915 esac
1916 if test -r $dest/configure; then
1917 AC_MSG_RESULT(running configure fragment for $dir)
1918 . $dest/configure
1919 fi
1920 [
1921 if test -z "$uname"; then
1922 if test -r $dest/uname.c ||
1923 test -r $dest/uname.S ||
1924 { test -r $dest/syscalls.list &&
1925 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1926 uname=$dir
1927 fi
1928 fi
1929 ]dnl
1930 done
1932 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
1933 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
1934 fi
1935 AC_SUBST(libc_cv_gcc_unwind_find_fde)
1937 # If we will use the generic uname implementation, we must figure out what
1938 # it will say by examining the system, and write the results in config-name.h.
1939 if test "$uname" = "sysdeps/generic"; then
1941 changequote(,)dnl
1942 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1943 changequote([,])dnl
1944 if test $uname_sysname != $config_os; then
1945 config_release=`echo $config_os | sed s/$uname_sysname//`
1946 fi
1947 dnl
1948 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1949 if test -r /vmunix; then
1950 kernel_id=`strings /vmunix | grep UNIX`
1951 elif test -r /dynix; then
1952 kernel_id=`strings /dynix | grep DYNIX`
1953 else
1954 kernel_id=
1955 fi
1956 ])dnl
1958 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1959 LIBC_KERNEL_ID
1960 changequote(,)dnl
1961 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1962 changequote([,])dnl
1963 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1964 != x$config_release; then
1965 # The configuration release is a substring of the kernel release.
1966 libc_cv_uname_release=$kernel_release
1967 elif test x$config_release != x; then
1968 libc_cv_uname_release=$config_release
1969 elif test x$kernel_release != x; then
1970 libc_cv_uname_release=$kernel_release
1971 else
1972 libc_cv_uname_release=unknown
1973 fi])
1974 uname_release="$libc_cv_uname_release"
1976 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1977 LIBC_KERNEL_ID
1978 changequote(,)dnl
1979 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1980 changequote([,])dnl
1981 if test -n "$kernel_version"; then
1982 libc_cv_uname_version="$kernel_version"
1983 else
1984 libc_cv_uname_version=unknown
1985 fi])
1986 uname_version="$libc_cv_uname_version"
1988 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1989 config_uname=config-name.h:config-name.in
1990 else
1991 # For non-generic uname, we don't need to create config-name.h at all.
1992 config_uname=
1993 fi
1995 dnl This is tested by existing code and it's simpler to avoid changing it.
1996 AC_DEFINE(USE_IN_LIBIO)
1998 # Test for old glibc 2.0.x headers so that they can be removed properly
1999 # Search only in includedir.
2000 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2001 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2002 then
2003 old_glibc_headers=yes
2004 else
2005 old_glibc_headers=no
2006 fi
2007 AC_MSG_RESULT($old_glibc_headers)
2008 if test ${old_glibc_headers} = yes; then
2009 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2010 AC_MSG_WARN(*** be removed.)
2011 fi
2012 AC_SUBST(old_glibc_headers)
2014 AC_SUBST(libc_cv_slibdir)
2015 AC_SUBST(libc_cv_localedir)
2016 AC_SUBST(libc_cv_sysconfdir)
2017 AC_SUBST(libc_cv_rootsbindir)
2018 AC_SUBST(libc_cv_forced_unwind)
2020 AC_SUBST(use_ldconfig)
2021 AC_SUBST(ldd_rewrite_script)
2023 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
2024 if test $gnu_ld = yes; then
2025 AC_DEFINE(HAVE_GNU_LD)
2026 fi
2027 if test $gnu_as = yes; then
2028 AC_DEFINE(HAVE_GNU_AS)
2029 fi
2030 if test $elf = yes; then
2031 AC_DEFINE(HAVE_ELF)
2032 fi
2033 if test $xcoff = yes; then
2034 AC_DEFINE(HAVE_XCOFF)
2035 fi
2037 AC_SUBST(static)
2038 AC_SUBST(shared)
2039 if test $shared = default; then
2040 if test $gnu_ld = yes; then
2041 shared=$elf
2042 else
2043 # For now we do not assume shared libs are available. In future more
2044 # tests might become available.
2045 shared=no
2046 fi
2047 fi
2049 if test x"$libc_cv_idn" = xyes; then
2050 AC_DEFINE(HAVE_LIBIDN)
2051 fi
2053 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
2054 [pic_default=yes
2055 cat > conftest.c <<EOF
2056 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2057 # error PIC is default.
2058 #endif
2059 EOF
2060 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2061 pic_default=no
2062 fi
2063 rm -f conftest.*])
2064 AC_SUBST(pic_default)
2066 AC_SUBST(profile)
2067 AC_SUBST(omitfp)
2068 AC_SUBST(bounded)
2069 AC_SUBST(static_nss)
2070 AC_SUBST(nopic_initfini)
2072 AC_SUBST(DEFINES)
2074 case "$add_ons" in
2075 *door*) linux_doors=yes ;;
2076 *) linux_doors=no ;;
2077 esac
2078 AC_SUBST(linux_doors)
2080 dnl See sysdeps/mach/configure.in for this variable.
2081 AC_SUBST(mach_interface_list)
2083 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2084 config_makefile=
2085 else
2086 config_makefile=Makefile
2087 fi
2089 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2090 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2091 AC_SUBST(VERSION)
2092 AC_SUBST(RELEASE)
2094 AC_CONFIG_FILES([config.make ${config_makefile} ${config_uname}])
2095 AC_CONFIG_COMMANDS([default],[[
2096 case $CONFIG_FILES in *config.make*)
2097 echo "$config_vars" >> config.make;;
2098 esac
2099 test -d bits || mkdir bits]],[[config_vars='$config_vars']])
2100 AC_OUTPUT