| blob | 099a9e216efc4eff74a2607781fb4ddb16393dbe |
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 dnl On some platforms we cannot use dynamic loading. We must provide
214 dnl static NSS modules.
215 AC_ARG_ENABLE([static-nss],
216 AC_HELP_STRING([--enable-static-nss],
217 [build static NSS modules @<:@default=no@:>@]),
218 [static_nss=$enableval],
219 [static_nss=no])
220 dnl Enable static NSS also if we build no shared objects.
221 if test x"$static_nss" = xyes || test x"$shared" = xno; then
222 static_nss=yes
223 AC_DEFINE(DO_STATIC_NSS)
224 fi
226 AC_ARG_ENABLE([force-install],
227 AC_HELP_STRING([--disable-force-install],
228 [don't force installation of files from this package, even if they are older than the installed files]),
229 [force_install=$enableval],
230 [force_install=yes])
231 AC_SUBST(force_install)
233 dnl On some platforms we allow dropping compatibility with all kernel
234 dnl versions.
235 AC_ARG_ENABLE([kernel],
236 AC_HELP_STRING([--enable-kernel=VERSION],
237 [compile for compatibility with kernel not older than VERSION]),
238 [minimum_kernel=$enableval],
239 [])
240 dnl Prevent unreasonable values.
241 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
242 # Better nothing than this.
243 minimum_kernel=""
244 else
245 if test "$minimum_kernel" = current; then
246 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
247 fi
248 fi
250 dnl For the development we sometimes want gcc to issue even more warnings.
251 dnl This is not the default since many of the extra warnings are not
252 dnl appropriate.
253 AC_ARG_ENABLE([all-warnings],
254 AC_HELP_STRING([--enable-all-warnings],
255 [enable all useful warnings gcc can issue]),
256 [all_warnings=$enableval],
257 [])
258 AC_SUBST(all_warnings)
260 AC_CANONICAL_HOST
262 # The way shlib-versions is used to generate soversions.mk uses a
263 # fairly simplistic model for name recognition that can't distinguish
264 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
265 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
266 # tell. This doesn't get used much beyond that, so it's fairly safe.
267 case "$host_os" in
268 linux*)
269 ;;
270 gnu*)
271 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
272 ;;
273 esac
275 # We keep the original values in `$config_*' and never modify them, so we
276 # can write them unchanged into config.make. Everything else uses
277 # $machine, $vendor, and $os, and changes them whenever convenient.
278 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
280 # Don't allow vendor == "unknown"
281 test "$config_vendor" = unknown && config_vendor=
282 config_os="`echo $config_os | sed 's/^unknown-//'`"
284 # Some configurations imply other options.
285 case "$host_os" in
286 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
287 # These systems always use GNU tools.
288 gnu_ld=yes gnu_as=yes ;;
289 esac
290 case "$host_os" in
291 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
292 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
293 ;;
294 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
295 # These systems (almost) always use the ELF format.
296 elf=yes
297 ;;
298 aix*)
299 # These systems are always xcoff
300 xcoff=yes
301 elf=no
302 ;;
303 esac
305 # The configure fragment of an add-on port can modify these to supplement
306 # or override the table in the case statement below. No fragment should
307 # ever change the config_* variables, however.
308 machine=$config_machine
309 vendor=$config_vendor
310 os=$config_os
312 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
313 # Unify this here.
314 if test "$machine" = rs6000; then
315 machine="powerpc"
316 fi
318 # Braindead PowerPC box with absolutely no FPU.
319 case "$machine-$host_os" in
320 powerpc*-*soft)
321 with_fp=no
322 ;;
323 esac
326 # An add-on can set this when it the tuple to disable the sanity check below.
327 libc_config_ok=no
329 dnl Having this here, though empty, makes sure that if add-ons' fragments
330 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
331 dnl our AC_OUTPUT will actually use it.
332 AC_CONFIG_SUBDIRS()
334 add_ons_sfx=
335 add_ons_pfx=
336 if test x"$add_ons" != x; then
337 for f in $add_ons; do
338 # Some sanity checks
339 case "$f" in
340 crypt)
341 AC_MSG_ERROR([
342 *** It seems that you're using an old \`crypt' add-on. crypt is now
343 *** part of glibc and using the old add-on will not work with this
344 *** release. Start again with fresh sources and without the old
345 *** \`crypt' add-on.])
346 ;;
347 localedata)
348 AC_MSG_ERROR([
349 *** It seems that you're using an old \`localedata' add-on. localedata
350 *** is now part of glibc and using the old add-on will not work with
351 *** this release. Start again with fresh sources and without the old
352 *** \`localedata' add-on.])
353 ;;
354 esac
356 # Test whether such a subdir really exists.
357 if test -d $srcdir/$f; then
358 add_ons_pfx="$add_ons_pfx $f/"
359 add_ons_sfx="$add_ons_sfx /$f"
360 else
361 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
362 fi
363 done
365 # Now source each add-on's configure fragment.
366 # The fragments can use $srcdir/$libc_add_on to find themselves.
367 for libc_add_on in $add_ons; do
368 libc_add_on_frag=$srcdir/$libc_add_on/configure
369 if test -r $libc_add_on_frag; then
370 AC_MSG_RESULT(running configure fragment for add-on $libc_add_on)
371 . $libc_add_on_frag
372 else
373 AC_MSG_WARN(add-on fragment $libc_add_on_frag missing)
374 fi
375 done
376 fi
377 AC_SUBST(add_ons)
380 ###
381 ### I put this here to prevent those annoying emails from people who cannot
382 ### read and try to compile glibc on unsupported platforms. --drepper
383 ###
384 ### By using the undocumented --enable-hacker-mode option for configure
385 ### one can skip this test to make the configuration not fail for unsupported
386 ### platforms.
387 ###
388 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
389 case "$machine-$host_os" in
390 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
391 ;;
392 *)
393 echo "*** The GNU C library is currently not available for this platform."
394 echo "*** So far nobody cared to port it and if there is no volunteer it"
395 echo "*** might never happen. So, if you have interest to see glibc on"
396 echo "*** this platform visit"
397 echo "*** http://www.gnu.org/software/libc/porting.html"
398 echo "*** and join the group of porters"
399 exit 1
400 ;;
401 esac
402 fi
404 dnl We need to use [ and ] for other purposes for a while now.
405 changequote(,)dnl
406 # Expand the configuration machine name into a subdirectory by architecture
407 # type and particular chip. If an add-on configure fragment already set
408 # base_machine, we don't change it.
409 test -n "$base_machine" || case "$machine" in
410 a29k | am29000) base_machine=a29k machine=a29k ;;
411 alpha*) base_machine=alpha machine=alpha/$machine ;;
412 arm*) base_machine=arm machine=arm/arm32/$machine ;;
413 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
414 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
415 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
416 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
417 i[34567]86) base_machine=i386 machine=i386/$machine ;;
418 ia64) base_machine=ia64 machine=ia64 ;;
419 m680?0) base_machine=m68k machine=m68k/$machine ;;
420 m68k) base_machine=m68k machine=m68k/m68020 ;;
421 m88???) base_machine=m88k machine=m88k/$machine ;;
422 m88k) base_machine=m88k machine=m88k/m88100 ;;
423 mips64*) base_machine=mips64
424 case "$CC $CFLAGS $CPPFLAGS " in
425 *" -mabi=n32 "*) mips_cc_abi=n32 ;;
426 *" -mabi=64 "*|*" -mabi=n64 "*) mips_cc_abi=64 ;;
427 *" -mabi=32 "*|*" -mabi=o32 "*) mips_cc_abi=32 ;;
428 *) mips_cc_abi=default ;;
429 esac
430 case $config_os in
431 *abin32*) mips_config_abi=n32 ;;
432 *abi64*|*abin64*) mips_config_abi=64 ;;
433 *abi32*|*abio32*) mips_config_abi=32 ;;
434 *) mips_config_abi=$mips_cc_abi ;;
435 esac
436 case $mips_config_abi in
437 default) machine=mips/mips64/n32 mips_config_abi=n32 ;;
438 n32) machine=mips/mips64/n32 ;;
439 64) machine=mips/mips64/n64 ;;
440 32) machine=mips/mips32/kern64 ;;
441 esac
442 machine=$machine/$config_machine
443 if test $mips_config_abi != $mips_cc_abi; then
444 # This won't make it to config.make, but we want to
445 # set this in case configure tests depend on it.
446 CPPFLAGS="$CPPFLAGS -mabi=$mips_config_abi"
447 fi
448 ;;
449 mips*) base_machine=mips machine=mips/mips32/$machine ;;
450 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
451 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
452 s390) base_machine=s390 machine=s390/s390-32 ;;
453 s390x) base_machine=s390 machine=s390/s390-64 ;;
454 sh3*) base_machine=sh machine=sh/sh3 ;;
455 sh4*) base_machine=sh machine=sh/sh4 ;;
456 sparc | sparcv[67])
457 base_machine=sparc machine=sparc/sparc32 ;;
458 sparcv8 | supersparc | hypersparc)
459 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
460 sparcv8plus | sparcv8plusa | sparcv9)
461 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
462 sparcv8plusb | sparcv9b)
463 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
464 sparc64 | ultrasparc)
465 base_machine=sparc machine=sparc/sparc64 ;;
466 sparc64b | ultrasparc3)
467 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
468 thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
469 *) base_machine=$machine ;;
470 esac
471 changequote([,])dnl
472 AC_SUBST(base_machine)
474 if test "$base_machine" = "i386"; then
475 AC_DEFINE(USE_REGPARMS)
476 fi
478 # Compute the list of sysdep directories for this configuration.
479 # This can take a while to compute.
480 sysdep_dir=$srcdir/sysdeps
481 AC_MSG_CHECKING(sysdep dirs)
482 dnl We need to use [ and ] for other purposes for a while now.
483 changequote(,)dnl
484 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
485 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
487 case "$os" in
488 gnu*)
489 base_os=mach/hurd ;;
490 netbsd* | 386bsd* | freebsd* | bsdi*)
491 base_os=unix/bsd/bsd4.4 ;;
492 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
493 base_os=unix/bsd ;;
494 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
495 base_os=unix/sysv ;;
496 irix6*)
497 base_os=unix/sysv/irix6/$os ;;
498 solaris[2-9]*)
499 base_os=unix/sysv/sysv4 ;;
500 hpux*)
501 base_os=unix/sysv/hpux/$os ;;
502 aix4.3*)
503 base_os=unix/sysv/aix/aix4.3 ;;
504 none)
505 base_os=standalone ;;
506 *)
507 base_os='' ;;
508 esac
510 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
511 tail=$os
512 ostry=$os
513 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
514 ostry="$ostry /$o"
515 tail=$o
516 done
517 o=`echo $tail | sed 's/[0-9]*$//'`
518 if test $o != $tail; then
519 ostry="$ostry /$o"
520 fi
521 # For linux-gnu, try linux-gnu, then linux.
522 o=`echo $tail | sed 's/-.*$//'`
523 if test $o != $tail; then
524 ostry="$ostry /$o"
525 fi
527 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
528 base=
529 tail=$base_os
530 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
531 set $b
532 base="$base /$1"
533 tail="$2"
534 done
536 # For sparc/sparc32, try sparc/sparc32 and then sparc.
537 mach=
538 tail=$machine
539 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
540 set $m
541 # Prepend the machine's FPU directory unless --without-fp.
542 if test "$with_fp" = yes; then
543 mach="$mach /$1/fpu"
544 else
545 mach="$mach /$1/nofpu"
546 fi
547 mach="$mach /$1"
548 tail="$2"
549 done
551 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
552 changequote([,])dnl
554 # Find what sysdep directories exist.
555 sysnames=
556 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
557 for d in $add_ons_pfx ''; do
558 for b in $base ''; do
559 for m0 in $mach ''; do
560 for v in /$vendor ''; do
561 test "$v" = / && continue
562 for o in /$ostry ''; do
563 test "$o" = / && continue
564 for m in $mach ''; do
565 for a in $add_ons_sfx ''; do
566 if test "$m0$b$v$o$m"; then
567 try="${d}sysdeps$m0$b$v$o$m$a"
568 test -n "$enable_debug_configure" &&
569 echo "$0 [DEBUG]: try $try" >&2
570 if test -d $srcdir/$try; then
571 sysnames="$sysnames $try"
572 { test -n "$o" || test -n "$b"; } && os_used=t
573 { test -n "$m" || test -n "$m0"; } && machine_used=t
574 fi
575 fi
576 done
577 done
578 done
579 done
580 done
581 done
582 done
583 IFS="$ac_save_ifs"
585 if test -z "$os_used" && test "$os" != none; then
586 AC_MSG_ERROR(Operating system $os is not supported.)
587 fi
588 if test -z "$machine_used" && test "$machine" != none; then
589 AC_MSG_ERROR(The $machine is not supported.)
590 fi
592 # We have now validated the configuration.
595 # If using ELF, look for an `elf' subdirectory of each machine directory.
596 # We prepend these rather than inserting them whereever the machine appears
597 # because things specified by the machine's ELF ABI should override
598 # OS-specific things, and should always be the same for any OS on the
599 # machine (otherwise what's the point of an ABI?).
600 if test "$elf" = yes; then
601 elf_dirs=
602 for d in $add_ons_pfx ''; do
603 for m in $mach; do
604 if test -d $srcdir/${d}sysdeps$m/elf; then
605 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
606 fi
607 done
608 done
609 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
610 fi
613 # Expand the list of system names into a full list of directories
614 # from each element's parent name and Implies file (if present).
615 set $sysnames
616 names=
617 while test $# -gt 0; do
618 name=$1
619 shift
621 case " $names " in *" $name "*)
622 # Already in the list.
623 continue
624 esac
626 # Report each name as we discover it, so there is no long pause in output.
627 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
629 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
631 case $name in
632 /*) xsrcdir= ;;
633 *) xsrcdir=$srcdir/ ;;
634 esac
635 test -n "$enable_debug_configure" &&
636 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
638 if test -f $xsrcdir$name/Implies; then
639 # Collect more names from the `Implies' file (removing comments).
640 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
641 implied=
642 for x in $implied_candidate; do
643 found=no
644 if test -d $xsrcdir$name_base/$x; then
645 implied="$implied $name_base/$x";
646 found=yes
647 fi
648 for d in $add_ons_pfx ''; do
649 try="${d}sysdeps/$x"
650 case $d in
651 /*) try_srcdir= ;;
652 *) try_srcdir=$srcdir/ ;;
653 esac
654 test -n "$enable_debug_configure" &&
655 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
656 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
657 then
658 implied="$implied $try"
659 found=yes
660 fi
661 done
662 if test $found = no; then
663 AC_MSG_WARN($name/Implies specifies nonexistent $x)
664 fi
665 done
666 else
667 implied=
668 fi
670 # Add NAME to the list of names.
671 names="$names $name"
673 # Find the parent of NAME, using the empty string if it has none.
674 changequote(,)dnl
675 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
676 changequote([,])dnl
678 # Add the names implied by NAME, and NAME's parent (if it has one), to
679 # the list of names to be processed (the argument list). We prepend the
680 # implied names to the list and append the parent. We want implied
681 # directories to come before further directories inferred from the
682 # configuration components; this ensures that for sysv4, unix/common
683 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
684 # after sysv4).
685 sysnames="`echo $implied $* $parent`"
686 test -n "$sysnames" && set $sysnames
687 done
689 # Add the default directories.
690 default_sysnames=sysdeps/generic
691 if test "$elf" = yes; then
692 default_sysnames="sysdeps/generic/elf $default_sysnames"
693 fi
694 sysnames="$names $default_sysnames"
695 AC_SUBST(sysnames)
696 # The other names were emitted during the scan.
697 AC_MSG_RESULT($default_sysnames)
700 ### Locate tools.
702 AC_PROG_INSTALL
703 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
704 # The makefiles need to use a different form to find it in $srcdir.
705 INSTALL='\$(..)./scripts/install-sh -c'
706 fi
707 AC_PROG_LN_S
709 AC_PROG_CC
710 if test $host != $build; then
711 AC_CHECK_PROGS(BUILD_CC, gcc cc)
712 fi
713 AC_SUBST(cross_compiling)
714 AC_PROG_CPP
715 # We need the C++ compiler only for testing.
716 AC_PROG_CXX
717 LIBC_PROG_BINUTILS
718 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
720 # Accept binutils 2.13 or newer.
721 AC_CHECK_PROG_VER(AS, $AS, --version,
722 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
723 [2.1[3-9]*], AS=: critic_missing="$critic_missing as")
724 AC_CHECK_PROG_VER(LD, $LD, --version,
725 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
726 [2.1[3-9]*], LD=: critic_missing="$critic_missing ld")
728 # We need the physical current working directory. We cannot use the
729 # "pwd -P" shell builtin since that's not portable. Instead we try to
730 # find a pwd binary. Note that assigning to the PWD environment
731 # variable might have some interesting side effects, so we don't do
732 # that.
733 AC_PATH_PROG(PWD_P, pwd, no)
734 if test "$PWD_P" = no; then
735 AC_MSG_ERROR(*** A pwd binary could not be found.)
736 fi
738 # These programs are version sensitive.
739 AC_CHECK_TOOL_PREFIX
740 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
741 [version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]*],
742 critic_missing="$critic_missing gcc")
743 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
744 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
745 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
747 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
748 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
749 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
750 MSGFMT=: aux_missing="$aux_missing msgfmt")
751 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
752 [GNU texinfo.* \([0-9][0-9.]*\)],
753 [4.*],
754 MAKEINFO=: aux_missing="$aux_missing makeinfo")
755 AC_CHECK_PROG_VER(SED, sed, --version,
756 [GNU sed version \([0-9]*\.[0-9.]*\)],
757 [3.0[2-9]*|3.[1-9]*|[4-9]*],
758 SED=: aux_missing="$aux_missing sed")
760 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
761 case "x$AUTOCONF" in
762 xno|x|x:) AUTOCONF=no ;;
763 *)
764 AC_CACHE_CHECK(dnl
765 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
766 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
767 libc_cv_autoconf_works=yes
768 else
769 libc_cv_autoconf_works=no
770 fi])
771 test $libc_cv_autoconf_works = yes || AUTOCONF=no
772 ;;
773 esac
774 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
775 # If --without-cvs they probably won't change configure.in, so no complaints.
776 aux_missing="$aux_missing autoconf"
777 fi
779 test -n "$critic_missing" && AC_MSG_ERROR([
780 *** These critical programs are missing or too old:$critic_missing
781 *** Check the INSTALL file for required versions.])
783 test -n "$aux_missing" && AC_MSG_WARN([
784 *** These auxiliary programs are missing or incompatible versions:$aux_missing
785 *** some features will be disabled.
786 *** Check the INSTALL file for required versions.])
788 # if using special system headers, find out the compiler's sekrit
789 # header directory and add that to the list. NOTE: Only does the right
790 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
791 if test -n "$sysheaders"; then
792 ccheaders=`$CC -print-file-name=include`
793 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
794 fi
795 AC_SUBST(SYSINCLUDES)
797 # check if ranlib is necessary
798 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
799 cat > conftest.c <<EOF
800 int a;
801 char b;
802 void c(void) {}
803 EOF
804 $CC $CFLAGS $CPPFLAGS -c conftest.c
805 $AR cr conftest.a conftest.o
806 cp conftest.a conftest2.a
807 $RANLIB conftest.a
808 if cmp -s conftest.a conftest2.a; then
809 libc_cv_ranlib_necessary=no
810 else
811 libc_cv_ranlib_necessary=yes
812 fi
813 rm -rf conftest*])
814 if test "$libc_cv_ranlib_necessary" = no; then
815 RANLIB=:
816 fi
818 # Test if LD_LIBRARY_PATH contains the notation for the current directory
819 # since this would lead to problems installing/building glibc.
820 # LD_LIBRARY_PATH contains the current directory if one of the following
821 # is true:
822 # - one of the terminals (":" and ";") is the first or last sign
823 # - two terminals occur directly after each other
824 # - the path contains an element with a dot in it
825 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
826 changequote(,)dnl
827 case ${LD_LIBRARY_PATH} in
828 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
829 ld_library_path_setting="contains current directory"
830 ;;
831 *)
832 ld_library_path_setting="ok"
833 ;;
834 esac
835 changequote([,])dnl
836 AC_MSG_RESULT($ld_library_path_setting)
837 if test "$ld_library_path_setting" != "ok"; then
838 AC_MSG_ERROR([
839 *** LD_LIBRARY_PATH shouldn't contain the current directory when
840 *** building glibc. Please change the environment variable
841 *** and run configure again.])
842 fi
844 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
845 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
846 libc_cv_gcc_static_libgcc=
847 else
848 libc_cv_gcc_static_libgcc=-static-libgcc
849 fi])
850 AC_SUBST(libc_cv_gcc_static_libgcc)
852 AC_PATH_PROG(BASH, bash, no)
853 if test "$BASH" != no &&
854 $BASH -c 'test "$BASH_VERSINFO" \
855 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
856 libc_cv_have_bash2=yes
857 else
858 libc_cv_have_bash2=no
859 fi
860 AC_SUBST(libc_cv_have_bash2)
862 dnl We need a ksh compatible shell for tzselect.
863 if test "$BASH" = no; then
864 AC_PATH_PROG(KSH, ksh, no)
865 if test "$KSH" = no; then
866 libc_cv_have_ksh=no
867 else
868 libc_cv_have_ksh=yes
869 fi
870 else
871 KSH="$BASH"
872 AC_SUBST(KSH)
873 libc_cv_have_ksh=yes
874 fi
875 AC_SUBST(libc_cv_have_ksh)
877 AC_PROG_AWK
878 AC_PATH_PROG(PERL, perl, no)
879 if test "$PERL" != no &&
880 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
881 PERL=no
882 fi
883 AC_PATH_PROG(INSTALL_INFO, install-info, no,
884 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
885 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
887 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
888 echo '#include <stddef.h>
889 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
890 if eval "$ac_cpp conftest.c 2>/dev/null" \
891 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
892 libc_cv_signed_size_t=no
893 else
894 libc_cv_signed_size_t=yes
895 fi
896 rm -f conftest*])
897 if test $libc_cv_signed_size_t = yes; then
898 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
899 cat >> confdefs.h <<\EOF
900 #undef __SIZE_TYPE__
901 #define __SIZE_TYPE__ unsigned
902 EOF
903 fi
905 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
906 AC_TRY_COMPILE(dnl
907 [#define __need_size_t
908 #define __need_wchar_t
909 #include <stddef.h>
910 #define __need_NULL
911 #include <stddef.h>], [size_t size; wchar_t wchar;
912 #ifdef offsetof
913 #error stddef.h ignored __need_*
914 #endif
915 if (&size == NULL || &wchar == NULL) abort ();],
916 libc_cv_friendly_stddef=yes,
917 libc_cv_friendly_stddef=no)])
918 if test $libc_cv_friendly_stddef = yes; then
919 config_vars="$config_vars
920 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
921 fi
923 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
924 libc_cv_need_minus_P, [dnl
925 cat > conftest.S <<EOF
926 #include "confdefs.h"
927 /* Nothing whatsoever. */
928 EOF
929 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
930 libc_cv_need_minus_P=no
931 else
932 libc_cv_need_minus_P=yes
933 fi
934 rm -f conftest*])
935 if test $libc_cv_need_minus_P = yes; then
936 config_vars="$config_vars
937 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
938 fi
940 AC_MSG_CHECKING(whether .text pseudo-op must be used)
941 AC_CACHE_VAL(libc_cv_dot_text, [dnl
942 cat > conftest.s <<EOF
943 .text
944 EOF
945 libc_cv_dot_text=
946 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
947 libc_cv_dot_text=.text
948 fi
949 rm -f conftest*])
950 if test -z "$libc_cv_dot_text"; then
951 AC_MSG_RESULT(no)
952 else
953 AC_MSG_RESULT(yes)
954 fi
956 AC_CACHE_CHECK(for assembler global-symbol directive,
957 libc_cv_asm_global_directive, [dnl
958 libc_cv_asm_global_directive=UNKNOWN
959 for ac_globl in .globl .global .EXPORT; do
960 cat > conftest.s <<EOF
961 ${libc_cv_dot_text}
962 ${ac_globl} foo
963 foo:
964 EOF
965 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
966 libc_cv_asm_global_directive=${ac_globl}
967 fi
968 rm -f conftest*
969 test $libc_cv_asm_global_directive != UNKNOWN && break
970 done])
971 if test $libc_cv_asm_global_directive = UNKNOWN; then
972 AC_MSG_ERROR(cannot determine asm global directive)
973 else
974 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
975 fi
977 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
978 cat > conftest.s <<EOF
979 ${libc_cv_dot_text}
980 foo:
981 .set glibc_conftest_frobozz,foo
982 $libc_cv_asm_global_directive glibc_conftest_frobozz
983 EOF
984 # The alpha-dec-osf1 assembler gives only a warning for `.set'
985 # (but it doesn't work), so we must do a linking check to be sure.
986 cat > conftest1.c <<\EOF
987 extern int glibc_conftest_frobozz;
988 void _start() { glibc_conftest_frobozz = 1; }
989 EOF
990 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
991 -nostartfiles -nostdlib \
992 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
993 libc_cv_asm_set_directive=yes
994 else
995 libc_cv_asm_set_directive=no
996 fi
997 rm -f conftest*])
998 if test $libc_cv_asm_set_directive = yes; then
999 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1000 fi
1002 AC_CACHE_CHECK(for assembler .type directive prefix,
1003 libc_cv_asm_type_prefix, [dnl
1004 libc_cv_asm_type_prefix=no
1005 for ac_try_prefix in '@' '%' '#'; do
1006 cat > conftest.s <<EOF
1007 ${libc_cv_dot_text}
1008 ${libc_cv_asm_global_directive} foo
1009 .type foo, ${ac_try_prefix}object
1010 .size foo, 1
1011 foo:
1012 .byte 1
1013 EOF
1014 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1015 libc_cv_asm_type_prefix=${ac_try_prefix}
1016 fi
1017 rm -f conftest*
1018 test "x$libc_cv_asm_type_prefix" != xno && break
1019 done])
1020 if test "x$libc_cv_asm_type_prefix" != xno; then
1021 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
1022 fi
1024 # The Aix ld uses global .symbol_names instead of symbol_names.
1025 # Unfortunately also used in the PPC64 ELF ABI.
1026 case "${os}${machine}" in
1027 aix4.3* | linux*powerpc/powerpc64*)
1028 AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
1029 esac
1031 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1032 [cat > conftest.s <<EOF
1033 ${libc_cv_dot_text}
1034 _sym:
1035 .symver _sym,sym@VERS
1036 EOF
1037 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1038 libc_cv_asm_symver_directive=yes
1039 else
1040 libc_cv_asm_symver_directive=no
1041 fi
1042 rm -f conftest*])
1043 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1044 if test $libc_cv_asm_symver_directive = yes; then
1045 cat > conftest.s <<EOF
1046 ${libc_cv_dot_text}
1047 _sym:
1048 .symver _sym,sym@VERS
1049 EOF
1050 cat > conftest.map <<EOF
1051 VERS_1 {
1052 global: sym;
1053 };
1055 VERS_2 {
1056 global: sym;
1057 } VERS_1;
1058 EOF
1059 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1060 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1061 -o conftest.so conftest.o
1062 -nostartfiles -nostdlib
1063 -Wl,--version-script,conftest.map
1064 1>&AS_MESSAGE_LOG_FD]);
1065 then
1066 libc_cv_ld_version_script_option=yes
1067 else
1068 libc_cv_ld_version_script_option=no
1069 fi
1070 else
1071 libc_cv_ld_version_script_option=no
1072 fi
1073 else
1074 libc_cv_ld_version_script_option=no
1075 fi
1076 rm -f conftest*])
1077 if test $shared != no &&
1078 test $libc_cv_asm_symver_directive = yes &&
1079 test $libc_cv_ld_version_script_option = yes &&
1080 test $enable_versioning = yes; then
1081 VERSIONING=yes
1082 AC_DEFINE(DO_VERSIONING)
1083 else
1084 VERSIONING=no
1085 fi
1086 AC_SUBST(VERSIONING)
1088 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1089 echo "\
1090 *** WARNING: You should not compile GNU libc without versioning. Not using
1091 *** versioning will introduce incompatibilities so that old binaries
1092 *** will not run anymore.
1093 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1094 fi
1095 if test $elf = yes; then
1096 AC_CACHE_CHECK(for .previous assembler directive,
1097 libc_cv_asm_previous_directive, [dnl
1098 cat > conftest.s <<EOF
1099 .section foo_section
1100 .previous
1101 EOF
1102 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1103 libc_cv_asm_previous_directive=yes
1104 else
1105 libc_cv_asm_previous_directive=no
1106 fi
1107 rm -f conftest*])
1108 if test $libc_cv_asm_previous_directive = yes; then
1109 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1110 else
1111 AC_CACHE_CHECK(for .popsection assembler directive,
1112 libc_cv_asm_popsection_directive, [dnl
1113 cat > conftest.s <<EOF
1114 .pushsection foo_section
1115 .popsection
1116 EOF
1117 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1118 libc_cv_asm_popsection_directive=yes
1119 else
1120 libc_cv_asm_popsection_directive=no
1121 fi
1122 rm -f conftest*])
1123 if test $libc_cv_asm_popsection_directive = yes; then
1124 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1125 fi
1126 fi
1127 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1128 libc_cv_asm_protected_directive, [dnl
1129 cat > conftest.s <<EOF
1130 .protected foo
1131 foo:
1132 .hidden bar
1133 bar:
1134 EOF
1135 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1136 libc_cv_asm_protected_directive=yes
1137 else
1138 libc_cv_asm_protected_directive=no
1139 fi
1140 rm -f conftest*])
1141 AC_SUBST(libc_cv_asm_protected_directive)
1142 AC_DEFINE(HAVE_PROTECTED)
1143 AC_DEFINE(HAVE_HIDDEN)
1145 if test $libc_cv_asm_protected_directive = yes; then
1146 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1147 libc_cv_visibility_attribute,
1148 [cat > conftest.c <<EOF
1149 int foo __attribute__ ((visibility ("hidden"))) = 1;
1150 int bar __attribute__ ((visibility ("protected"))) = 1;
1151 EOF
1152 libc_cv_visibility_attribute=no
1153 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1154 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1155 if grep '\.protected.*bar' conftest.s >/dev/null; then
1156 libc_cv_visibility_attribute=yes
1157 fi
1158 fi
1159 fi
1160 rm -f conftest.[cs]
1161 ])
1162 if test $libc_cv_visibility_attribute = yes; then
1163 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1164 fi
1165 fi
1167 if test $libc_cv_visibility_attribute = yes; then
1168 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1169 libc_cv_broken_visibility_attribute,
1170 [cat > conftest.c <<EOF
1171 int foo (int x);
1172 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1173 int bar (int x) { return x; }
1174 EOF
1175 libc_cv_broken_visibility_attribute=yes
1176 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
1177 changequote(,)dnl
1178 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1179 changequote([,])dnl
1180 libc_cv_broken_visibility_attribute=no
1181 fi
1182 fi
1183 rm -f conftest.c conftest.s
1184 ])
1185 if test $libc_cv_broken_visibility_attribute = yes; then
1186 AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
1187 fi
1188 fi
1190 AC_CACHE_CHECK(for broken __attribute__((alias())),
1191 libc_cv_broken_alias_attribute,
1192 [cat > conftest.c <<EOF
1193 extern int foo (int x) __asm ("xyzzy");
1194 int bar (int x) { return x; }
1195 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1196 extern int dfoo;
1197 extern __typeof (dfoo) dfoo __asm ("abccb");
1198 int dfoo = 1;
1199 EOF
1200 libc_cv_broken_alias_attribute=yes
1201 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1202 if grep 'xyzzy' conftest.s >/dev/null &&
1203 grep 'abccb' conftest.s >/dev/null; then
1204 libc_cv_broken_alias_attribute=no
1205 fi
1206 fi
1207 rm -f conftest.c conftest.s
1208 ])
1209 if test $libc_cv_broken_alias_attribute = yes; then
1210 AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
1211 fi
1213 if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
1214 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1215 libc_cv_have_sdata_section,
1216 [echo "int i;" > conftest.c
1217 libc_cv_have_sdata_section=no
1218 if ${CC-cc} $LDFLAGS -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1219 | grep '\.sdata' >/dev/null; then
1220 libc_cv_have_sdata_section=yes
1221 fi
1222 rm -f conftest.c conftest.so
1223 ])
1224 if test $libc_cv_have_sdata_section = yes; then
1225 AC_DEFINE(HAVE_SDATA_SECTION)
1226 fi
1227 fi
1229 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1230 libc_cv_initfinit_array, [dnl
1231 cat > conftest.c <<EOF
1232 int _start (void) { return 0; }
1233 int __start (void) { return 0; }
1234 int foo (void) { return 1; }
1235 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1236 EOF
1237 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1238 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1239 then
1240 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1241 libc_cv_initfinit_array=yes
1242 else
1243 libc_cv_initfinit_array=no
1244 fi
1245 else
1246 libc_cv_initfinit_array=no
1247 fi
1248 rm -f conftest*])
1249 AC_SUBST(libc_cv_initfinit_array)
1250 if test $libc_cv_initfinit_array = yes; then
1251 AC_DEFINE(HAVE_INITFINI_ARRAY)
1252 fi
1254 AC_CACHE_CHECK(for libunwind-support in compiler,
1255 libc_cv_cc_with_libunwind, [dnl
1256 AC_TRY_LINK([#include <libunwind.h>], [
1257 unw_context_t uc;
1258 unw_cursor_t c;
1259 unw_getcontext (&uc);
1260 unw_init_local (&c, &uc)],
1261 libc_cv_cc_with_libunwind=yes, libc_cv_cc_with_libunwind=no)])
1262 AC_SUBST(libc_cv_cc_with_libunwind)
1263 if test $libc_cv_cc_with_libunwind = yes; then
1264 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1265 fi
1267 AC_CACHE_CHECK(for -z nodelete option,
1268 libc_cv_z_nodelete, [dnl
1269 cat > conftest.c <<EOF
1270 int _start (void) { return 42; }
1271 EOF
1272 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1273 -shared -o conftest.so conftest.c
1274 -nostartfiles -nostdlib
1275 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1276 then
1277 libc_cv_z_nodelete=yes
1278 else
1279 libc_cv_z_nodelete=no
1280 fi
1281 rm -f conftest*])
1282 AC_SUBST(libc_cv_z_nodelete)
1284 AC_CACHE_CHECK(for -z nodlopen option,
1285 libc_cv_z_nodlopen, [dnl
1286 cat > conftest.c <<EOF
1287 int _start (void) { return 42; }
1288 EOF
1289 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1290 -shared -o conftest.so conftest.c
1291 -nostartfiles -nostdlib
1292 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1293 then
1294 libc_cv_z_nodlopen=yes
1295 else
1296 libc_cv_z_nodlopen=no
1297 fi
1298 rm -f conftest*])
1299 AC_SUBST(libc_cv_z_nodlopen)
1301 AC_CACHE_CHECK(for -z initfirst option,
1302 libc_cv_z_initfirst, [dnl
1303 cat > conftest.c <<EOF
1304 int _start (void) { return 42; }
1305 EOF
1306 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1307 -shared -o conftest.so conftest.c
1308 -nostartfiles -nostdlib
1309 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1310 then
1311 libc_cv_z_initfirst=yes
1312 else
1313 libc_cv_z_initfirst=no
1314 fi
1315 rm -f conftest*])
1316 AC_SUBST(libc_cv_z_initfirst)
1318 AC_CACHE_CHECK(for -z relro option,
1319 libc_cv_z_relro, [dnl
1320 if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
1321 then
1322 libc_cv_z_relro=yes
1323 else
1324 libc_cv_z_relro=no
1325 fi])
1326 AC_SUBST(libc_cv_z_relro)
1327 if test $libc_cv_z_relro = yes; then
1328 AC_DEFINE(HAVE_Z_RELRO)
1329 fi
1331 AC_CACHE_CHECK(for -Bgroup option,
1332 libc_cv_Bgroup, [dnl
1333 cat > conftest.c <<EOF
1334 int _start (void) { return 42; }
1335 EOF
1336 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1337 -shared -o conftest.so conftest.c
1338 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1339 then
1340 libc_cv_Bgroup=yes
1341 else
1342 libc_cv_Bgroup=no
1343 fi
1344 rm -f conftest*])
1345 AC_SUBST(libc_cv_Bgroup)
1347 AC_CACHE_CHECK(for libgcc_s suffix,
1348 libc_cv_libgcc_s_suffix, [dnl
1349 cat > conftest.c <<EOF
1350 int main (void) { return 0; }
1351 EOF
1352 changequote(,)dnl
1353 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1354 -shared -shared-libgcc -o conftest.so \
1355 conftest.c -v 2>&1 >/dev/null \
1356 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1357 changequote([,])dnl
1358 rm -f conftest*])
1359 AC_SUBST(libc_cv_libgcc_s_suffix)
1361 AC_CACHE_CHECK(for --as-needed option,
1362 libc_cv_as_needed, [dnl
1363 cat > conftest.c <<EOF
1364 int main (void) { return 0; }
1365 EOF
1366 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1367 -shared -o conftest.so conftest.c
1368 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1369 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1370 then
1371 libc_cv_as_needed=yes
1372 else
1373 libc_cv_as_needed=no
1374 fi
1375 rm -f conftest*])
1376 AC_SUBST(libc_cv_as_needed)
1378 ASFLAGS_config=
1379 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1380 libc_cv_as_noexecstack, [dnl
1381 cat > conftest.c <<EOF
1382 void foo (void) { }
1383 EOF
1384 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1385 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1386 && grep -q .note.GNU-stack conftest.s \
1387 && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wa,--noexecstack
1388 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1389 then
1390 libc_cv_as_noexecstack=yes
1391 else
1392 libc_cv_as_noexecstack=no
1393 fi
1394 rm -f conftest*])
1395 if test $libc_cv_as_noexecstack = yes; then
1396 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1397 fi
1398 AC_SUBST(ASFLAGS_config)
1400 AC_CACHE_CHECK(for -z combreloc,
1401 libc_cv_z_combreloc, [dnl
1402 cat > conftest.c <<EOF
1403 extern int bar (int);
1404 extern int mumble;
1405 int foo (void) { return bar (mumble); }
1406 EOF
1407 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1408 -shared -o conftest.so conftest.c
1409 -nostdlib -nostartfiles
1410 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1411 then
1412 dnl The following test is a bit weak. We must use a tool which can test
1413 dnl cross-platform since the gcc used can be a cross compiler. Without
1414 dnl introducing new options this is not easily doable. Instead use a tool
1415 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1416 dnl look for a section named .rel.dyn.
1417 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1418 libc_cv_z_combreloc=yes
1419 else
1420 libc_cv_z_combreloc=no
1421 fi
1422 else
1423 libc_cv_z_combreloc=no
1424 fi
1425 rm -f conftest*])
1426 if test "$libc_cv_z_combreloc" = yes; then
1427 AC_DEFINE(HAVE_Z_COMBRELOC)
1428 fi
1429 AC_SUBST(libc_cv_z_combreloc)
1431 AC_CACHE_CHECK(for -z execstack,
1432 libc_cv_z_execstack, [dnl
1433 cat > conftest.c <<EOF
1434 int _start (void) { return 42; }
1435 EOF
1436 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1437 -shared -o conftest.so conftest.c
1438 -Wl,-z,execstack -nostdlib
1439 1>&AS_MESSAGE_LOG_FD])
1440 then
1441 libc_cv_z_execstack=yes
1442 else
1443 libc_cv_z_execstack=no
1444 fi
1445 rm -f conftest*])
1446 AC_SUBST(libc_cv_z_execstack)
1448 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1449 cat > conftest.c <<EOF
1450 int foo;
1451 main () { return 0;}
1452 EOF
1453 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1454 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1455 then
1456 libc_cv_fpie=yes
1457 else
1458 libc_cv_fpie=no
1459 fi
1460 rm -f conftest*])
1462 AC_SUBST(libc_cv_fpie)
1463 fi
1465 AC_CACHE_CHECK(for -fno-unit-at-a-time, libc_cv_fno_unit_at_a_time, [dnl
1466 cat > conftest.c <<EOF
1467 int foo;
1468 EOF
1469 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-unit-at-a-time
1470 conftest.c 1>&AS_MESSAGE_LOG_FD])
1471 then
1472 libc_cv_fno_unit_at_a_time=yes
1473 else
1474 libc_cv_fno_unit_at_a_time=no
1475 fi
1476 rm -f conftest*])
1477 if test $libc_cv_fno_unit_at_a_time = yes; then
1478 fno_unit_at_a_time=-fno-unit-at-a-time
1479 fi
1480 AC_SUBST(fno_unit_at_a_time)
1482 if test $elf != yes; then
1483 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1484 [AC_TRY_COMPILE(, [asm (".section .init");
1485 asm (".section .fini");
1486 asm ("${libc_cv_dot_text}");],
1487 libc_cv_have_initfini=yes,
1488 libc_cv_have_initfini=no)])
1489 AC_SUBST(libc_cv_have_initfini)dnl
1490 if test $libc_cv_have_initfini = yes; then
1491 AC_DEFINE(HAVE_INITFINI)
1492 fi
1493 fi
1495 if test $elf = yes -a $gnu_ld = yes; then
1496 AC_CACHE_CHECK(whether cc puts quotes around section names,
1497 libc_cv_have_section_quotes,
1498 [cat > conftest.c <<EOF
1499 static const int foo
1500 __attribute__ ((section ("bar"))) = 1;
1501 EOF
1502 if ${CC-cc} -S conftest.c -o conftest.s; then
1503 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1504 libc_cv_have_section_quotes=yes
1505 else
1506 libc_cv_have_section_quotes=no
1507 fi
1508 else
1509 libc_cv_have_section_quotes=unknown
1510 fi
1511 rm -f conftest.[cs]
1512 ])
1513 if test $libc_cv_have_section_quotes = yes; then
1514 AC_DEFINE(HAVE_SECTION_QUOTES)
1515 fi
1516 fi
1518 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1519 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1520 [cat > conftest.$ac_ext <<EOF
1521 dnl This sometimes fails to find confdefs.h, for some reason.
1522 dnl [#]line $LINENO "[$]0"
1523 [#]line $LINENO "configure"
1524 #include "confdefs.h"
1525 void underscore_test(void) {
1526 return; }
1527 EOF
1528 if AC_TRY_EVAL(ac_compile); then
1529 if grep _underscore_test conftest* >/dev/null; then
1530 ifelse([$1], , :, [rm -f conftest*
1531 $1])
1532 else
1533 ifelse([$2], , , [rm -f conftest*
1534 $2])
1535 fi
1536 else
1537 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1538 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1539 ifelse([$2], , , [rm -f conftest*
1540 $2])
1541 fi
1542 rm -f conftest*])
1544 if test $elf = yes; then
1545 libc_cv_asm_underscores=no
1546 else
1547 if test $ac_cv_prog_cc_works = yes; then
1548 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1549 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1550 libc_cv_asm_underscores=yes,
1551 libc_cv_asm_underscores=no)])
1552 else
1553 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1554 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1555 libc_cv_asm_underscores=no)])
1556 fi
1557 fi
1558 if test $libc_cv_asm_underscores = no; then
1559 AC_DEFINE(NO_UNDERSCORES)
1560 fi
1562 if test $elf = yes; then
1563 libc_cv_weak_symbols=yes
1564 fi
1566 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1567 [dnl
1568 cat > conftest.s <<EOF
1569 ${libc_cv_dot_text}
1570 ${libc_cv_asm_global_directive} foo
1571 foo:
1572 .weak foo
1573 .weak bar; bar = foo
1574 EOF
1575 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1576 libc_cv_asm_weak_directive=yes
1577 else
1578 libc_cv_asm_weak_directive=no
1579 fi
1580 rm -f conftest*])
1582 if test $libc_cv_asm_weak_directive = no; then
1583 AC_CACHE_CHECK(for assembler .weakext directive,
1584 libc_cv_asm_weakext_directive,
1585 [dnl
1586 cat > conftest.s <<EOF
1587 ${libc_cv_dot_text}
1588 ${libc_cv_asm_global_directive} foo
1589 foo:
1590 .weakext bar foo
1591 .weakext baz
1592 ${libc_cv_asm_global_directive} baz
1593 baz:
1594 EOF
1595 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1596 libc_cv_asm_weakext_directive=yes
1597 else
1598 libc_cv_asm_weakext_directive=no
1599 fi
1600 rm -f conftest*])
1602 fi # no .weak
1604 if test $libc_cv_asm_weak_directive = yes; then
1605 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1606 elif test $libc_cv_asm_weakext_directive = yes; then
1607 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1608 fi
1610 dnl The standard hppa assembler uses `;' to start comments and `!'
1611 dnl as a line separator. CRIS uses `;' to start comments and `@' for
1612 dnl line separator.
1613 case "${host_cpu}-${host_os}" in
1614 cris*)
1615 libc_cv_asm_line_sep='@'
1616 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1617 ;;
1618 hppa*linux*)
1619 AC_CACHE_CHECK(for assembler line separator,
1620 libc_cv_asm_line_sep, [dnl
1621 cat > conftest.s <<EOF
1622 nop ; is_old_puffin
1623 EOF
1624 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1625 libc_cv_asm_line_sep='!'
1626 else
1627 if test -z "$enable_hacker_mode"; then
1628 echo "*** You need a newer assembler to compile glibc"
1629 rm -f conftest*
1630 exit 1
1631 fi
1632 libc_cv_asm_line_sep=';'
1633 fi
1634 rm -f conftest*])
1635 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1636 ;;
1637 esac
1639 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1640 cat > conftest.s <<EOF
1641 .text
1642 .type func,@function
1643 func:
1644 .cfi_startproc
1645 .cfi_remember_state
1646 .cfi_rel_offset 1, 0
1647 .cfi_endproc
1648 EOF
1649 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1650 libc_cv_asm_cfi_directives=yes
1651 else
1652 libc_cv_asm_cfi_directives=no
1653 fi
1654 rm -f conftest*])
1655 if test $libc_cv_asm_cfi_directives = yes; then
1656 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1657 fi
1659 AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
1660 libc_cv_cpp_asm_debuginfo, [dnl
1661 cat > conftest.S <<EOF
1662 #include "confdefs.h"
1664 /* comment on
1665 two lines */
1666 ${libc_cv_dot_text}
1667 ${libc_cv_asm_global_directive} foo
1668 foo:
1669 /* Unfortunately this test only works for a real instruction,
1670 not for any of the machine-independent pseudo-ops.
1671 So we just have to assume everybody has a "nop". */
1672 nop
1673 /* comment */
1674 nop
1675 /* comment */
1676 nop
1677 EOF
1678 if AC_TRY_COMMAND([${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) &&
1679 ac_pattern='conftest\.S'
1680 AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
1681 grep $ac_pattern 1>&AS_MESSAGE_LOG_FD]); then
1682 libc_cv_cpp_asm_debuginfo=yes
1683 else
1684 libc_cv_cpp_asm_debuginfo=no
1685 fi
1686 rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
1687 if test $libc_cv_cpp_asm_debuginfo = yes; then
1688 AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
1689 fi
1691 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1692 cat > conftest.c <<\EOF
1693 _start () {}
1694 int __eh_pc;
1695 __throw () {}
1696 EOF
1697 dnl No \ in command here because it ends up inside ''.
1698 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1699 -nostdlib -nostartfiles -Wl,--no-whole-archive
1700 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1701 libc_cv_ld_no_whole_archive=yes
1702 else
1703 libc_cv_ld_no_whole_archive=no
1704 fi
1705 rm -f conftest*])
1706 if test $libc_cv_ld_no_whole_archive = yes; then
1707 no_whole_archive=-Wl,--no-whole-archive
1708 fi
1709 AC_SUBST(no_whole_archive)dnl
1711 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1712 cat > conftest.c <<\EOF
1713 _start () {}
1714 int __eh_pc;
1715 __throw () {}
1716 EOF
1717 dnl No \ in command here because it ends up inside ''.
1718 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1719 -nostdlib -nostartfiles -fexceptions
1720 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1721 libc_cv_gcc_exceptions=yes
1722 else
1723 libc_cv_gcc_exceptions=no
1724 fi
1725 rm -f conftest*])
1726 if test $libc_cv_gcc_exceptions = yes; then
1727 exceptions=-fexceptions
1728 fi
1729 AC_SUBST(exceptions)dnl
1731 if test "$host_cpu" = powerpc ; then
1732 # Check for a bug present in at least versions 2.8.x of GCC
1733 # and versions 1.0.x of EGCS.
1734 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1735 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1736 libc_cv_c_asmcr0_bug='no',
1737 libc_cv_c_asmcr0_bug='yes')])
1738 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1739 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1740 fi
1741 fi
1743 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1744 [cat > conftest.c <<EOF
1745 #line $LINENO "configure"
1746 static char *__EH_FRAME_BEGIN__;
1747 _start ()
1748 {
1749 #ifdef CHECK__register_frame
1750 __register_frame (__EH_FRAME_BEGIN__);
1751 __deregister_frame (__EH_FRAME_BEGIN__);
1752 #endif
1753 #ifdef CHECK__register_frame_info
1754 __register_frame_info (__EH_FRAME_BEGIN__);
1755 __deregister_frame_info (__EH_FRAME_BEGIN__);
1756 #endif
1757 }
1758 int __eh_pc;
1759 __throw () {}
1760 /* FIXME: this is fragile. */
1761 malloc () {}
1762 strcmp () {}
1763 strlen () {}
1764 memcpy () {}
1765 memset () {}
1766 free () {}
1767 abort () {}
1768 __bzero () {}
1769 dl_iterate_phdr () {}
1770 EOF
1771 libc_unwind_check="${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame_info \
1772 $LDFLAGS \
1773 -nostdlib -nostartfiles -o conftest conftest.c \
1774 -lgcc"
1775 # Some platforms' specs put -lgcc first. The second one doesn't hurt.
1776 if AC_TRY_COMMAND([$libc_unwind_check >&AS_MESSAGE_LOG_FD]) ||
1777 AC_TRY_COMMAND([$libc_unwind_check -lgcc_eh -lgcc >&AS_MESSAGE_LOG_FD])
1778 then
1779 if $libc_unwind_check -v 2>&1 >/dev/null \
1780 | grep -- --eh-frame-hdr 2>&1 >/dev/null; then
1781 libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
1782 else
1783 libc_cv_gcc_dwarf2_unwind_info=static
1784 fi
1785 else
1786 libc_cv_gcc_dwarf2_unwind_info=no
1787 fi
1788 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1789 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame
1790 $LDFLAGS -nostdlib -nostartfiles
1791 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1792 libc_cv_gcc_dwarf2_unwind_info=yes
1793 else
1794 libc_cv_gcc_dwarf2_unwind_info=no
1795 fi
1796 fi
1797 rm -f conftest*])
1798 case $libc_cv_gcc_dwarf2_unwind_info in
1799 yes)
1800 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1801 ;;
1802 static)
1803 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1804 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1805 ;;
1806 esac
1808 dnl Check whether compiler understands __builtin_expect.
1809 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1810 [cat > conftest.c <<EOF
1811 #line $LINENO "configure"
1812 int foo (int a)
1813 {
1814 a = __builtin_expect (a, 10);
1815 return a == 10 ? 0 : 1;
1816 }
1817 EOF
1818 dnl No \ in command here because it ends up inside ''.
1819 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1820 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1821 libc_cv_gcc_builtin_expect=yes
1822 else
1823 libc_cv_gcc_builtin_expect=no
1824 fi
1825 rm -f conftest*])
1826 if test "$libc_cv_gcc_builtin_expect" = yes; then
1827 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1828 fi
1830 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1831 cat > conftest.c <<\EOF
1832 void zero (void *x)
1833 {
1834 __builtin_memset (x, 0, 1000);
1835 }
1836 EOF
1837 dnl
1838 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1839 then
1840 libc_cv_gcc_builtin_memset=no
1841 else
1842 libc_cv_gcc_builtin_memset=yes
1843 fi
1844 rm -f conftest* ])
1845 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1846 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1847 fi
1849 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1850 cat > conftest.c <<\EOF
1851 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1852 char *foo (const char *a, const char *b)
1853 {
1854 return __builtin_strstr (a, b);
1855 }
1856 EOF
1857 dnl
1858 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1859 then
1860 libc_cv_gcc_builtin_redirection=yes
1861 else
1862 libc_cv_gcc_builtin_redirection=no
1863 fi
1864 rm -f conftest* ])
1865 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
1866 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
1867 fi
1869 dnl Check whether the compiler supports subtraction of local labels.
1870 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1871 [cat > conftest.c <<EOF
1872 changequote(,)dnl
1873 #line $LINENO "configure"
1874 int foo (int a)
1875 {
1876 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1877 void *p = &&l1 + ar[a];
1878 goto *p;
1879 l1:
1880 return 1;
1881 l2:
1882 return 2;
1883 }
1884 changequote([,])dnl
1885 EOF
1886 dnl No \ in command here because it ends up inside ''.
1887 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1888 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1889 libc_cv_gcc_subtract_local_labels=yes
1890 else
1891 libc_cv_gcc_subtract_local_labels=no
1892 fi
1893 rm -f conftest*])
1894 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1895 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1896 fi
1898 dnl Check whether the compiler supports the __thread keyword.
1899 if test "x$use__thread" != xno; then
1900 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1901 [cat > conftest.c <<\EOF
1902 __thread int a = 42;
1903 EOF
1904 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1905 libc_cv_gcc___thread=yes
1906 else
1907 libc_cv_gcc___thread=no
1908 fi
1909 rm -f conftest*])
1910 if test "$libc_cv_gcc___thread" = yes; then
1911 AC_DEFINE(HAVE___THREAD)
1912 fi
1913 else
1914 libc_cv_gcc___thread=no
1915 fi
1917 if test "$libc_cv_gcc___thread" = yes; then
1918 dnl Check whether the compiler supports the tls_model attribute.
1919 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1920 cat > conftest.c <<\EOF
1921 extern __thread int a __attribute__((tls_model ("initial-exec")));
1922 EOF
1923 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1924 libc_cv_gcc_tls_model_attr=yes
1925 else
1926 libc_cv_gcc_tls_model_attr=no
1927 fi
1928 rm -f conftest*])
1929 if test "$libc_cv_gcc_tls_model_attr" = yes; then
1930 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
1931 fi
1932 fi
1934 dnl Check whether we have the gd library available.
1935 AC_MSG_CHECKING(for libgd)
1936 if test "$with_gd" != "no"; then
1937 old_CFLAGS="$CFLAGS"
1938 CFLAGS="$CFLAGS $libgd_include"
1939 old_LDFLAGS="$LDFLAGS"
1940 LDFLAGS="$LDFLAGS $libgd_ldflags"
1941 old_LIBS="$LIBS"
1942 LIBS="$LIBS -lgd -lpng -lz -lm"
1943 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1944 CFLAGS="$old_CFLAGS"
1945 LDFLAGS="$old_LDFLAGS"
1946 LIBS="$old_LIBS"
1947 else
1948 LIBGD=no
1949 fi
1950 AC_MSG_RESULT($LIBGD)
1951 AC_SUBST(LIBGD)
1953 dnl check for the size of 'long double'.
1954 AC_CHECK_SIZEOF(long double, 0)
1955 sizeof_long_double=$ac_cv_sizeof_long_double
1956 AC_SUBST(sizeof_long_double)
1958 ### End of automated tests.
1959 ### Now run sysdeps configure fragments.
1961 # They also can set these variables.
1962 use_ldconfig=no
1963 ldd_rewrite_script=no
1964 libc_cv_sysconfdir=$sysconfdir
1965 libc_cv_gcc_unwind_find_fde=no
1966 libc_cv_idn=no
1968 # Iterate over all the sysdep directories we will use, running their
1969 # configure fragments, and looking for a uname implementation.
1970 uname=
1971 for dir in $sysnames; do
1972 case $dir in
1973 /*) dest=$dir ;;
1974 *) dest=$srcdir/$dir ;;
1975 esac
1976 if test -r $dest/configure; then
1977 AC_MSG_RESULT(running configure fragment for $dir)
1978 . $dest/configure
1979 fi
1980 [
1981 if test -z "$uname"; then
1982 if test -r $dest/uname.c ||
1983 test -r $dest/uname.S ||
1984 { test -r $dest/syscalls.list &&
1985 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1986 uname=$dir
1987 fi
1988 fi
1989 ]dnl
1990 done
1992 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
1993 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
1994 fi
1995 AC_SUBST(libc_cv_gcc_unwind_find_fde)
1997 # If we will use the generic uname implementation, we must figure out what
1998 # it will say by examining the system, and write the results in config-name.h.
1999 if test "$uname" = "sysdeps/generic"; then
2001 changequote(,)dnl
2002 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
2003 changequote([,])dnl
2004 if test $uname_sysname != $config_os; then
2005 config_release=`echo $config_os | sed s/$uname_sysname//`
2006 fi
2007 dnl
2008 AC_DEFUN(LIBC_KERNEL_ID, [dnl
2009 if test -r /vmunix; then
2010 kernel_id=`strings /vmunix | grep UNIX`
2011 elif test -r /dynix; then
2012 kernel_id=`strings /dynix | grep DYNIX`
2013 else
2014 kernel_id=
2015 fi
2016 ])dnl
2018 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
2019 LIBC_KERNEL_ID
2020 changequote(,)dnl
2021 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
2022 changequote([,])dnl
2023 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
2024 != x$config_release; then
2025 # The configuration release is a substring of the kernel release.
2026 libc_cv_uname_release=$kernel_release
2027 elif test x$config_release != x; then
2028 libc_cv_uname_release=$config_release
2029 elif test x$kernel_release != x; then
2030 libc_cv_uname_release=$kernel_release
2031 else
2032 libc_cv_uname_release=unknown
2033 fi])
2034 uname_release="$libc_cv_uname_release"
2036 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
2037 LIBC_KERNEL_ID
2038 changequote(,)dnl
2039 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
2040 changequote([,])dnl
2041 if test -n "$kernel_version"; then
2042 libc_cv_uname_version="$kernel_version"
2043 else
2044 libc_cv_uname_version=unknown
2045 fi])
2046 uname_version="$libc_cv_uname_version"
2048 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
2049 config_uname=config-name.h:config-name.in
2050 else
2051 # For non-generic uname, we don't need to create config-name.h at all.
2052 config_uname=
2053 fi
2055 dnl This is tested by existing code and it's simpler to avoid changing it.
2056 AC_DEFINE(USE_IN_LIBIO)
2058 # Test for old glibc 2.0.x headers so that they can be removed properly
2059 # Search only in includedir.
2060 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2061 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2062 then
2063 old_glibc_headers=yes
2064 else
2065 old_glibc_headers=no
2066 fi
2067 AC_MSG_RESULT($old_glibc_headers)
2068 if test ${old_glibc_headers} = yes; then
2069 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2070 AC_MSG_WARN(*** be removed.)
2071 fi
2072 AC_SUBST(old_glibc_headers)
2074 AC_SUBST(libc_cv_slibdir)
2075 AC_SUBST(libc_cv_localedir)
2076 AC_SUBST(libc_cv_sysconfdir)
2077 AC_SUBST(libc_cv_rootsbindir)
2078 AC_SUBST(libc_cv_forced_unwind)
2080 AC_SUBST(use_ldconfig)
2081 AC_SUBST(ldd_rewrite_script)
2083 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
2084 if test $gnu_ld = yes; then
2085 AC_DEFINE(HAVE_GNU_LD)
2086 fi
2087 if test $gnu_as = yes; then
2088 AC_DEFINE(HAVE_GNU_AS)
2089 fi
2090 if test $elf = yes; then
2091 AC_DEFINE(HAVE_ELF)
2092 fi
2093 if test $xcoff = yes; then
2094 AC_DEFINE(HAVE_XCOFF)
2095 fi
2097 AC_SUBST(static)
2098 AC_SUBST(shared)
2099 if test $shared = default; then
2100 if test $gnu_ld = yes; then
2101 shared=$elf
2102 else
2103 # For now we do not assume shared libs are available. In future more
2104 # tests might become available.
2105 shared=no
2106 fi
2107 fi
2109 if test x"$libc_cv_idn" = xyes; then
2110 AC_DEFINE(HAVE_LIBIDN)
2111 fi
2113 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
2114 [pic_default=yes
2115 cat > conftest.c <<EOF
2116 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2117 # error PIC is default.
2118 #endif
2119 EOF
2120 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2121 pic_default=no
2122 fi
2123 rm -f conftest.*])
2124 AC_SUBST(pic_default)
2126 AC_SUBST(profile)
2127 AC_SUBST(omitfp)
2128 AC_SUBST(bounded)
2129 AC_SUBST(static_nss)
2130 AC_SUBST(nopic_initfini)
2132 AC_SUBST(DEFINES)
2134 case "$add_ons" in
2135 *door*) linux_doors=yes ;;
2136 *) linux_doors=no ;;
2137 esac
2138 AC_SUBST(linux_doors)
2140 dnl See sysdeps/mach/configure.in for this variable.
2141 AC_SUBST(mach_interface_list)
2143 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2144 config_makefile=
2145 else
2146 config_makefile=Makefile
2147 fi
2149 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2150 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2151 AC_SUBST(VERSION)
2152 AC_SUBST(RELEASE)
2154 AC_CONFIG_FILES([config.make ${config_makefile} ${config_uname}])
2155 AC_CONFIG_COMMANDS([default],[[
2156 case $CONFIG_FILES in *config.make*)
2157 echo "$config_vars" >> config.make;;
2158 esac
2159 test -d bits || mkdir bits]],[[config_vars='$config_vars']])
2160 AC_OUTPUT