| blob | 503611a6b9da90803760c9e6a58b3179ce2f74bc |
1 dnl Process this file with autoconf to produce a configure script.
2 AC_REVISION([$CVSid$])
3 AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required.
4 AC_INIT([GNU C Library], [(see version.h)], [glibc])
5 AC_CONFIG_SRCDIR([include/features.h])
6 AC_CONFIG_HEADERS([config.h])
7 AC_CONFIG_AUX_DIR([scripts])
9 if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
10 AC_MSG_ERROR([you must configure in a separate build directory])
11 fi
13 # This will get text that should go into config.make.
14 config_vars=
16 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
17 AC_ARG_WITH([gmp],
18 AC_HELP_STRING([--with-gmp=DIRECTORY],
19 [find GMP source code in DIRECTORY (not needed)]),
20 [
21 case "$with_gmp" in
22 yes) AC_MSG_ERROR([--with-gmp requires an argument; use --with-gmp=DIRECTORY]) ;;
23 ''|no) ;;
24 *) config_vars="$config_vars
25 gmp-srcdir = $withval" ;;
26 esac
27 ])
28 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
29 AC_ARG_WITH([gd],
30 AC_HELP_STRING([--with-gd=DIR],
31 [find libgd include dir and library with prefix DIR]),
32 [dnl
33 case "$with_gd" in
34 yes|''|no) ;;
35 *) libgd_include="-I$withval/include"
36 libgd_ldflags="-L$withval/lib" ;;
37 esac
38 ])
39 AC_ARG_WITH([gd-include],
40 AC_HELP_STRING([--with-gd-include=DIR],
41 [find libgd include files in DIR]),
42 [dnl
43 case "$with_gd_include" in
44 ''|no) ;;
45 *) libgd_include="-I$withval" ;;
46 esac
47 ])
48 AC_ARG_WITH([gd-lib],
49 AC_HELP_STRING([--with-gd-lib=DIR],
50 [find libgd library files in DIR]),
51 [dnl
52 case "$with_gd_lib" in
53 ''|no) ;;
54 *) libgd_ldflags="-L$withval" ;;
55 esac
56 ])
58 if test -n "$libgd_include"; then
59 config_vars="$config_vars
60 CFLAGS-memusagestat.c = $libgd_include"
61 fi
62 if test -n "$libgd_ldflags"; then
63 config_vars="$config_vars
64 libgd-LDFLAGS = $libgd_ldflags"
65 fi
67 dnl Arguments to specify presence of other packages/features.
68 AC_ARG_WITH([fp],
69 AC_HELP_STRING([--with-fp],
70 [if using floating-point hardware @<:@default=yes@:>@]),
71 [with_fp=$withval],
72 [with_fp=yes])
73 AC_SUBST(with_fp)
74 AC_ARG_WITH([binutils],
75 AC_HELP_STRING([--with-binutils=PATH],
76 [specify location of binutils (as and ld)]),
77 [path_binutils=$withval],
78 [path_binutils=''])
79 AC_ARG_WITH([elf],
80 AC_HELP_STRING([--with-elf],
81 [if using the ELF object format]),
82 [elf=$withval],
83 [elf=no])
84 AC_ARG_WITH([selinux],
85 AC_HELP_STRING([--with-selinux],
86 [if building with SELinux support]),
87 [with_selinux=$withval],
88 [with_selinux=auto])
89 AC_ARG_WITH([xcoff],
90 AC_HELP_STRING([--with-xcoff],
91 [if using the XCOFF object format]),
92 [xcoff=$withval],
93 [xcoff=no])
94 AC_ARG_WITH([cvs],
95 AC_HELP_STRING([--without-cvs],
96 [if CVS should not be used]),
97 [with_cvs=$withval],
98 [with_cvs=yes])
99 if test "$with_cvs" = yes; then
100 if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
101 then
102 with_cvs=no
103 fi
104 fi
105 AC_SUBST(with_cvs)
107 AC_ARG_WITH([headers],
108 AC_HELP_STRING([--with-headers=PATH],
109 [location of system headers to use
110 (for example /usr/src/linux/include)
111 @<:@default=compiler default@:>@]),
112 [sysheaders=$withval],
113 [sysheaders=''])
115 AC_ARG_ENABLE([sanity-checks],
116 AC_HELP_STRING([--disable-sanity-checks],
117 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
118 [enable_sanity=$enableval],
119 [enable_sanity=yes])
121 AC_SUBST(enable_check_abi)
122 AC_ARG_ENABLE([check-abi],
123 AC_HELP_STRING([--enable-check-abi],
124 [do "make check-abi" in "make check" (no/warn/yes)
125 @<:@default=no@:>@]),
126 [enable_check_abi=$enableval],
127 [enable_check_abi=no])
129 dnl Arguments to enable or disable building the static, shared, profiled,
130 dnl and -fomit-frame-pointer libraries.
131 dnl I've disabled this for now since we cannot build glibc without static
132 dnl libraries built in the moment.
133 dnl AC_ARG_ENABLE([static],
134 dnl AC_HELP_STRING([--enable-static],
135 dnl [build static library @<:@default=yes@:>@]),
136 dnl [static=$enableval],
137 dnl [static=yes])
138 static=yes
139 AC_ARG_ENABLE([shared],
140 AC_HELP_STRING([--enable-shared],
141 [build shared library @<:@default=yes if GNU ld & ELF@:>@]),
142 [shared=$enableval],
143 [shared=default])
144 AC_ARG_ENABLE([profile],
145 AC_HELP_STRING([--enable-profile],
146 [build profiled library @<:@default=yes@:>@]),
147 [profile=$enableval],
148 [profile=yes])
149 AC_ARG_ENABLE([omitfp],
150 AC_HELP_STRING([--enable-omitfp],
151 [build undebuggable optimized library @<:@default=no@:>@]),
152 [omitfp=$enableval],
153 [omitfp=no])
154 AC_ARG_ENABLE([bounded],
155 AC_HELP_STRING([--enable-bounded],
156 [build with runtime bounds checking @<:@default=no@:>@]),
157 [bounded=$enableval],
158 [bounded=no])
159 AC_ARG_ENABLE([versioning],
160 AC_HELP_STRING([--disable-versioning],
161 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
162 [enable_versioning=$enableval],
163 [enable_versioning=yes])
165 AC_ARG_ENABLE([oldest-abi],
166 AC_HELP_STRING([--enable-oldest-abi=ABI],
167 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
168 [oldest_abi=$enableval],
169 [oldest_abi=no])
170 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
171 oldest_abi=default
172 else
173 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
174 fi
175 AC_SUBST(oldest_abi)
177 dnl Generic infrastructure for drop-in additions to libc.
178 AC_ARG_ENABLE([add-ons],
179 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
180 [configure and build add-ons in DIR1,DIR2,... search for add-ons if no parameter given]),
181 [case "$enableval" in
182 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
183 add_ons_automatic=yes
184 test "$add_ons" = "*" && add_ons= ;;
185 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`
186 add_ons_automatic=no ;;
187 esac],
188 [add_ons= add_ons_automatic=no])
190 dnl Let the user avoid using TLS. Don't know why but...
191 AC_ARG_WITH([tls],
192 AC_HELP_STRING([--with-tls],
193 [enable support for TLS]),
194 [usetls=$withval],
195 [usetls=yes])
197 AC_ARG_WITH([__thread],
198 AC_HELP_STRING([--without-__thread],
199 [do not use TLS features even when supporting them]),
200 [use__thread=$withval],
201 [use__thread=yes])
203 AC_ARG_ENABLE([hidden-plt],
204 AC_HELP_STRING([--disable-hidden-plt],
205 [do not hide internal function calls to avoid PLT]),
206 [hidden=$enableval],
207 [hidden=yes])
208 if test "x$hidden" = xno; then
209 AC_DEFINE(NO_HIDDEN)
210 fi
212 AC_ARG_ENABLE([bind-now],
213 AC_HELP_STRING([--enable-bind-now],
214 [disable lazy relocations in DSOs]),
215 [bindnow=$enableval],
216 [bindnow=no])
217 AC_SUBST(bindnow)
219 dnl On some platforms we cannot use dynamic loading. We must provide
220 dnl static NSS modules.
221 AC_ARG_ENABLE([static-nss],
222 AC_HELP_STRING([--enable-static-nss],
223 [build static NSS modules @<:@default=no@:>@]),
224 [static_nss=$enableval],
225 [static_nss=no])
226 dnl Enable static NSS also if we build no shared objects.
227 if test x"$static_nss" = xyes || test x"$shared" = xno; then
228 static_nss=yes
229 AC_DEFINE(DO_STATIC_NSS)
230 fi
232 AC_ARG_ENABLE([force-install],
233 AC_HELP_STRING([--disable-force-install],
234 [don't force installation of files from this package, even if they are older than the installed files]),
235 [force_install=$enableval],
236 [force_install=yes])
237 AC_SUBST(force_install)
239 dnl On some platforms we allow dropping compatibility with all kernel
240 dnl versions.
241 AC_ARG_ENABLE([kernel],
242 AC_HELP_STRING([--enable-kernel=VERSION],
243 [compile for compatibility with kernel not older than VERSION]),
244 [minimum_kernel=$enableval],
245 [])
246 dnl Prevent unreasonable values.
247 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
248 # Better nothing than this.
249 minimum_kernel=""
250 else
251 if test "$minimum_kernel" = current; then
252 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
253 fi
254 fi
256 dnl For the development we sometimes want gcc to issue even more warnings.
257 dnl This is not the default since many of the extra warnings are not
258 dnl appropriate.
259 AC_ARG_ENABLE([all-warnings],
260 AC_HELP_STRING([--enable-all-warnings],
261 [enable all useful warnings gcc can issue]),
262 [all_warnings=$enableval],
263 [])
264 AC_SUBST(all_warnings)
266 AC_CANONICAL_HOST
268 # The way shlib-versions is used to generate soversions.mk uses a
269 # fairly simplistic model for name recognition that can't distinguish
270 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
271 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
272 # tell. This doesn't get used much beyond that, so it's fairly safe.
273 case "$host_os" in
274 linux*)
275 ;;
276 gnu*)
277 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
278 ;;
279 esac
281 # We keep the original values in `$config_*' and never modify them, so we
282 # can write them unchanged into config.make. Everything else uses
283 # $machine, $vendor, and $os, and changes them whenever convenient.
284 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
286 # Don't allow vendor == "unknown"
287 test "$config_vendor" = unknown && config_vendor=
288 config_os="`echo $config_os | sed 's/^unknown-//'`"
290 # Some configurations imply other options.
291 case "$host_os" in
292 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
293 # These systems always use GNU tools.
294 gnu_ld=yes gnu_as=yes ;;
295 esac
296 case "$host_os" in
297 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
298 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
299 ;;
300 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
301 # These systems (almost) always use the ELF format.
302 elf=yes
303 ;;
304 aix*)
305 # These systems are always xcoff
306 xcoff=yes
307 elf=no
308 ;;
309 esac
311 # The configure fragment of an add-on port can modify these to supplement
312 # or override the table in the case statement below. No fragment should
313 # ever change the config_* variables, however.
314 machine=$config_machine
315 vendor=$config_vendor
316 os=$config_os
318 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
319 # Unify this here.
320 if test "$machine" = rs6000; then
321 machine="powerpc"
322 fi
324 # Braindead PowerPC box with absolutely no FPU.
325 case "$machine-$host_os" in
326 powerpc*-*soft)
327 with_fp=no
328 ;;
329 esac
332 # An add-on can set this when it the tuple to disable the sanity check below.
333 libc_config_ok=no
335 dnl Having this here, though empty, makes sure that if add-ons' fragments
336 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
337 dnl our AC_OUTPUT will actually use it.
338 AC_CONFIG_SUBDIRS()
340 add_ons_sfx=
341 add_ons_pfx=
342 if test x"$add_ons" != x; then
343 for f in $add_ons; do
344 # Some sanity checks
345 case "$f" in
346 crypt)
347 AC_MSG_ERROR([
348 *** It seems that you're using an old \`crypt' add-on. crypt is now
349 *** part of glibc and using the old add-on will not work with this
350 *** release. Start again with fresh sources and without the old
351 *** \`crypt' add-on.])
352 ;;
353 localedata)
354 AC_MSG_ERROR([
355 *** It seems that you're using an old \`localedata' add-on. localedata
356 *** is now part of glibc and using the old add-on will not work with
357 *** this release. Start again with fresh sources and without the old
358 *** \`localedata' add-on.])
359 ;;
360 esac
362 # Test whether such a subdir really exists.
363 test -d $srcdir/$f || {
364 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
365 }
366 done
368 # Now source each add-on's configure fragment.
369 # The fragments can use $srcdir/$libc_add_on to find themselves,
370 # and test $add_ons_automatic to see if they were explicitly requested.
371 # A fragment can clear (or even change) $libc_add_on to affect
372 # whether it goes into the list to be actually used in the build.
373 use_add_ons=
374 for libc_add_on in $add_ons; do
375 libc_add_on_frag=$srcdir/$libc_add_on/configure
376 if test -r $libc_add_on_frag; then
377 AC_MSG_RESULT(running configure fragment for add-on $libc_add_on)
378 . $libc_add_on_frag
379 else
380 AC_MSG_WARN(add-on fragment $libc_add_on_frag missing)
381 fi
382 if test -n "$libc_add_on"; then
383 use_add_ons="$use_add_ons $libc_add_on"
384 add_ons_pfx="$add_ons_pfx $libc_add_on/"
385 add_ons_sfx="$add_ons_sfx /$libc_add_on"
386 fi
387 done
388 # Use echo to strip excess whitespace.
389 add_ons="`echo $use_add_ons`"
390 fi
391 AC_SUBST(add_ons)
394 ###
395 ### I put this here to prevent those annoying emails from people who cannot
396 ### read and try to compile glibc on unsupported platforms. --drepper
397 ###
398 ### By using the undocumented --enable-hacker-mode option for configure
399 ### one can skip this test to make the configuration not fail for unsupported
400 ### platforms.
401 ###
402 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
403 case "$machine-$host_os" in
404 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
405 ;;
406 *)
407 echo "*** The GNU C library is currently not available for this platform."
408 echo "*** So far nobody cared to port it and if there is no volunteer it"
409 echo "*** might never happen. So, if you have interest to see glibc on"
410 echo "*** this platform visit"
411 echo "*** http://www.gnu.org/software/libc/porting.html"
412 echo "*** and join the group of porters"
413 exit 1
414 ;;
415 esac
416 fi
418 dnl We need to use [ and ] for other purposes for a while now.
419 changequote(,)dnl
420 # Expand the configuration machine name into a subdirectory by architecture
421 # type and particular chip. If an add-on configure fragment already set
422 # base_machine, we don't change it.
423 test -n "$base_machine" || case "$machine" in
424 a29k | am29000) base_machine=a29k machine=a29k ;;
425 alpha*) base_machine=alpha machine=alpha/$machine ;;
426 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
427 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
428 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
429 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
430 i[34567]86) base_machine=i386 machine=i386/$machine ;;
431 ia64) base_machine=ia64 machine=ia64 ;;
432 m680?0) base_machine=m68k machine=m68k/$machine ;;
433 m68k) base_machine=m68k machine=m68k/m68020 ;;
434 m88???) base_machine=m88k machine=m88k/$machine ;;
435 m88k) base_machine=m88k machine=m88k/m88100 ;;
436 mips64*) base_machine=mips64
437 case "$CC $CFLAGS $CPPFLAGS " in
438 *" -mabi=n32 "*) mips_cc_abi=n32 ;;
439 *" -mabi=64 "*|*" -mabi=n64 "*) mips_cc_abi=64 ;;
440 *" -mabi=32 "*|*" -mabi=o32 "*) mips_cc_abi=32 ;;
441 *) mips_cc_abi=default ;;
442 esac
443 case $config_os in
444 *abin32*) mips_config_abi=n32 ;;
445 *abi64*|*abin64*) mips_config_abi=64 ;;
446 *abi32*|*abio32*) mips_config_abi=32 ;;
447 *) mips_config_abi=$mips_cc_abi ;;
448 esac
449 case $mips_config_abi in
450 default) machine=mips/mips64/n32 mips_config_abi=n32 ;;
451 n32) machine=mips/mips64/n32 ;;
452 64) machine=mips/mips64/n64 ;;
453 32) machine=mips/mips32/kern64 ;;
454 esac
455 machine=$machine/$config_machine
456 if test $mips_config_abi != $mips_cc_abi; then
457 # This won't make it to config.make, but we want to
458 # set this in case configure tests depend on it.
459 CPPFLAGS="$CPPFLAGS -mabi=$mips_config_abi"
460 fi
461 ;;
462 mips*) base_machine=mips machine=mips/mips32/$machine ;;
463 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
464 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
465 s390) base_machine=s390 machine=s390/s390-32 ;;
466 s390x) base_machine=s390 machine=s390/s390-64 ;;
467 sh3*) base_machine=sh machine=sh/sh3 ;;
468 sh4*) base_machine=sh machine=sh/sh4 ;;
469 sparc | sparcv[67])
470 base_machine=sparc machine=sparc/sparc32 ;;
471 sparcv8 | supersparc | hypersparc)
472 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
473 sparcv8plus | sparcv8plusa | sparcv9)
474 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
475 sparcv8plusb | sparcv9b)
476 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
477 sparc64)
478 base_machine=sparc machine=sparc/sparc64 ;;
479 sparc64b)
480 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
481 *) base_machine=$machine ;;
482 esac
483 changequote([,])dnl
484 AC_SUBST(base_machine)
486 if test "$base_machine" = "i386"; then
487 AC_DEFINE(USE_REGPARMS)
488 fi
490 # Compute the list of sysdep directories for this configuration.
491 # This can take a while to compute.
492 sysdep_dir=$srcdir/sysdeps
493 AC_MSG_CHECKING(sysdep dirs)
494 dnl We need to use [ and ] for other purposes for a while now.
495 changequote(,)dnl
496 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
497 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
499 case "$os" in
500 gnu*)
501 base_os=mach/hurd ;;
502 netbsd* | 386bsd* | freebsd* | bsdi*)
503 base_os=unix/bsd/bsd4.4 ;;
504 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
505 base_os=unix/bsd ;;
506 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
507 base_os=unix/sysv ;;
508 irix6*)
509 base_os=unix/sysv/irix6/$os ;;
510 solaris[2-9]*)
511 base_os=unix/sysv/sysv4 ;;
512 hpux*)
513 base_os=unix/sysv/hpux/$os ;;
514 aix4.3*)
515 base_os=unix/sysv/aix/aix4.3 ;;
516 none)
517 base_os=standalone ;;
518 *)
519 base_os='' ;;
520 esac
522 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
523 tail=$os
524 ostry=$os
525 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
526 ostry="$ostry /$o"
527 tail=$o
528 done
529 o=`echo $tail | sed 's/[0-9]*$//'`
530 if test $o != $tail; then
531 ostry="$ostry /$o"
532 fi
533 # For linux-gnu, try linux-gnu, then linux.
534 o=`echo $tail | sed 's/-.*$//'`
535 if test $o != $tail; then
536 ostry="$ostry /$o"
537 fi
539 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
540 base=
541 tail=$base_os
542 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
543 set $b
544 base="$base /$1"
545 tail="$2"
546 done
548 # For sparc/sparc32, try sparc/sparc32 and then sparc.
549 mach=
550 tail=$machine
551 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
552 set $m
553 # Prepend the machine's FPU directory unless --without-fp.
554 if test "$with_fp" = yes; then
555 mach="$mach /$1/fpu"
556 else
557 mach="$mach /$1/nofpu"
558 fi
559 mach="$mach /$1"
560 tail="$2"
561 done
563 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
564 changequote([,])dnl
566 # Find what sysdep directories exist.
567 sysnames=
568 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
569 for d in $add_ons_pfx ''; do
570 for b in $base ''; do
571 for m0 in $mach ''; do
572 for v in /$vendor ''; do
573 test "$v" = / && continue
574 for o in /$ostry ''; do
575 test "$o" = / && continue
576 for m in $mach ''; do
577 for a in $add_ons_sfx ''; do
578 if test "$m0$b$v$o$m"; then
579 try="${d}sysdeps$m0$b$v$o$m$a"
580 test -n "$enable_debug_configure" &&
581 echo "$0 [DEBUG]: try $try" >&2
582 if test -d $srcdir/$try; then
583 sysnames="$sysnames $try"
584 { test -n "$o" || test -n "$b"; } && os_used=t
585 { test -n "$m" || test -n "$m0"; } && machine_used=t
586 fi
587 fi
588 done
589 done
590 done
591 done
592 done
593 done
594 if test -n "$d"; then
595 try="${d}sysdeps/generic"
596 test -n "$enable_debug_configure" &&
597 echo "$0 DEBUG: try $try" >&2
598 if test -d $srcdir/$try; then
599 sysnames="$sysnames $try"
600 fi
601 fi
602 done
603 IFS="$ac_save_ifs"
605 if test -z "$os_used" && test "$os" != none; then
606 AC_MSG_ERROR(Operating system $os is not supported.)
607 fi
608 if test -z "$machine_used" && test "$machine" != none; then
609 AC_MSG_ERROR(The $machine is not supported.)
610 fi
612 # We have now validated the configuration.
615 # If using ELF, look for an `elf' subdirectory of each machine directory.
616 # We prepend these rather than inserting them whereever the machine appears
617 # because things specified by the machine's ELF ABI should override
618 # OS-specific things, and should always be the same for any OS on the
619 # machine (otherwise what's the point of an ABI?).
620 if test "$elf" = yes; then
621 elf_dirs=
622 for d in $add_ons_pfx ''; do
623 for m in $mach; do
624 if test -d $srcdir/${d}sysdeps$m/elf; then
625 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
626 fi
627 done
628 done
629 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
630 fi
633 # Expand the list of system names into a full list of directories
634 # from each element's parent name and Implies file (if present).
635 set $sysnames
636 names=
637 while test $# -gt 0; do
638 name=$1
639 shift
641 case " $names " in *" $name "*)
642 # Already in the list.
643 continue
644 esac
646 # Report each name as we discover it, so there is no long pause in output.
647 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
649 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
651 case $name in
652 /*) xsrcdir= ;;
653 *) xsrcdir=$srcdir/ ;;
654 esac
655 test -n "$enable_debug_configure" &&
656 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
658 if test -f $xsrcdir$name/Implies; then
659 # Collect more names from the `Implies' file (removing comments).
660 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
661 implied=
662 for x in $implied_candidate; do
663 found=no
664 if test -d $xsrcdir$name_base/$x; then
665 implied="$implied $name_base/$x";
666 found=yes
667 fi
668 for d in $add_ons_pfx ''; do
669 try="${d}sysdeps/$x"
670 case $d in
671 /*) try_srcdir= ;;
672 *) try_srcdir=$srcdir/ ;;
673 esac
674 test -n "$enable_debug_configure" &&
675 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
676 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
677 then
678 implied="$implied $try"
679 found=yes
680 fi
681 done
682 if test $found = no; then
683 AC_MSG_WARN($name/Implies specifies nonexistent $x)
684 fi
685 done
686 else
687 implied=
688 fi
690 # Add NAME to the list of names.
691 names="$names $name"
693 # Find the parent of NAME, using the empty string if it has none.
694 changequote(,)dnl
695 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
696 changequote([,])dnl
698 # Add the names implied by NAME, and NAME's parent (if it has one), to
699 # the list of names to be processed (the argument list). We prepend the
700 # implied names to the list and append the parent. We want implied
701 # directories to come before further directories inferred from the
702 # configuration components; this ensures that for sysv4, unix/common
703 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
704 # after sysv4).
705 sysnames="`echo $implied $* $parent`"
706 test -n "$sysnames" && set $sysnames
707 done
709 # Add the default directories.
710 default_sysnames=sysdeps/generic
711 if test "$elf" = yes; then
712 default_sysnames="sysdeps/generic/elf $default_sysnames"
713 fi
714 sysnames="$names $default_sysnames"
715 AC_SUBST(sysnames)
716 # The other names were emitted during the scan.
717 AC_MSG_RESULT($default_sysnames)
720 ### Locate tools.
722 AC_PROG_INSTALL
723 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
724 # The makefiles need to use a different form to find it in $srcdir.
725 INSTALL='\$(..)./scripts/install-sh -c'
726 fi
727 AC_PROG_LN_S
729 AC_PROG_CC
730 if test $host != $build; then
731 AC_CHECK_PROGS(BUILD_CC, gcc cc)
732 fi
733 AC_SUBST(cross_compiling)
734 AC_PROG_CPP
735 # We need the C++ compiler only for testing.
736 AC_PROG_CXX
737 LIBC_PROG_BINUTILS
738 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
740 # Accept binutils 2.13 or newer.
741 AC_CHECK_PROG_VER(AS, $AS, --version,
742 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
743 [2.1[3-9]*], AS=: critic_missing="$critic_missing as")
744 AC_CHECK_PROG_VER(LD, $LD, --version,
745 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
746 [2.1[3-9]*], LD=: critic_missing="$critic_missing ld")
748 # We need the physical current working directory. We cannot use the
749 # "pwd -P" shell builtin since that's not portable. Instead we try to
750 # find a pwd binary. Note that assigning to the PWD environment
751 # variable might have some interesting side effects, so we don't do
752 # that.
753 AC_PATH_PROG(PWD_P, pwd, no)
754 if test "$PWD_P" = no; then
755 AC_MSG_ERROR(*** A pwd binary could not be found.)
756 fi
758 # These programs are version sensitive.
759 AC_CHECK_TOOL_PREFIX
760 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
761 [version \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ],
762 critic_missing="$critic_missing gcc")
763 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
764 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
765 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
767 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
768 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
769 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
770 MSGFMT=: aux_missing="$aux_missing msgfmt")
771 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
772 [GNU texinfo.* \([0-9][0-9.]*\)],
773 [4.*],
774 MAKEINFO=: aux_missing="$aux_missing makeinfo")
775 AC_CHECK_PROG_VER(SED, sed, --version,
776 [GNU sed version \([0-9]*\.[0-9.]*\)],
777 [3.0[2-9]*|3.[1-9]*|[4-9]*],
778 SED=: aux_missing="$aux_missing sed")
780 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
781 case "x$AUTOCONF" in
782 xno|x|x:) AUTOCONF=no ;;
783 *)
784 AC_CACHE_CHECK(dnl
785 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
786 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
787 libc_cv_autoconf_works=yes
788 else
789 libc_cv_autoconf_works=no
790 fi])
791 test $libc_cv_autoconf_works = yes || AUTOCONF=no
792 ;;
793 esac
794 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
795 # If --without-cvs they probably won't change configure.in, so no complaints.
796 aux_missing="$aux_missing autoconf"
797 fi
799 test -n "$critic_missing" && AC_MSG_ERROR([
800 *** These critical programs are missing or too old:$critic_missing
801 *** Check the INSTALL file for required versions.])
803 test -n "$aux_missing" && AC_MSG_WARN([
804 *** These auxiliary programs are missing or incompatible versions:$aux_missing
805 *** some features will be disabled.
806 *** Check the INSTALL file for required versions.])
808 # if using special system headers, find out the compiler's sekrit
809 # header directory and add that to the list. NOTE: Only does the right
810 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
811 if test -n "$sysheaders"; then
812 ccheaders=`$CC -print-file-name=include`
813 SYSINCLUDES="-nostdinc -isystem $ccheaders \
814 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
815 fi
816 AC_SUBST(SYSINCLUDES)
818 # check if ranlib is necessary
819 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
820 cat > conftest.c <<EOF
821 int a;
822 char b;
823 void c(void) {}
824 EOF
825 $CC $CFLAGS $CPPFLAGS -c conftest.c
826 $AR cr conftest.a conftest.o
827 cp conftest.a conftest2.a
828 $RANLIB conftest.a
829 if cmp -s conftest.a conftest2.a; then
830 libc_cv_ranlib_necessary=no
831 else
832 libc_cv_ranlib_necessary=yes
833 fi
834 rm -rf conftest*])
835 if test "$libc_cv_ranlib_necessary" = no; then
836 RANLIB=:
837 fi
839 # Test if LD_LIBRARY_PATH contains the notation for the current directory
840 # since this would lead to problems installing/building glibc.
841 # LD_LIBRARY_PATH contains the current directory if one of the following
842 # is true:
843 # - one of the terminals (":" and ";") is the first or last sign
844 # - two terminals occur directly after each other
845 # - the path contains an element with a dot in it
846 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
847 changequote(,)dnl
848 case ${LD_LIBRARY_PATH} in
849 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
850 ld_library_path_setting="contains current directory"
851 ;;
852 *)
853 ld_library_path_setting="ok"
854 ;;
855 esac
856 changequote([,])dnl
857 AC_MSG_RESULT($ld_library_path_setting)
858 if test "$ld_library_path_setting" != "ok"; then
859 AC_MSG_ERROR([
860 *** LD_LIBRARY_PATH shouldn't contain the current directory when
861 *** building glibc. Please change the environment variable
862 *** and run configure again.])
863 fi
865 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
866 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
867 libc_cv_gcc_static_libgcc=
868 else
869 libc_cv_gcc_static_libgcc=-static-libgcc
870 fi])
871 AC_SUBST(libc_cv_gcc_static_libgcc)
873 AC_PATH_PROG(BASH, bash, no)
874 if test "$BASH" != no &&
875 $BASH -c 'test "$BASH_VERSINFO" \
876 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
877 libc_cv_have_bash2=yes
878 else
879 libc_cv_have_bash2=no
880 fi
881 AC_SUBST(libc_cv_have_bash2)
883 dnl We need a ksh compatible shell for tzselect.
884 if test "$BASH" = no; then
885 AC_PATH_PROG(KSH, ksh, no)
886 if test "$KSH" = no; then
887 libc_cv_have_ksh=no
888 else
889 libc_cv_have_ksh=yes
890 fi
891 else
892 KSH="$BASH"
893 AC_SUBST(KSH)
894 libc_cv_have_ksh=yes
895 fi
896 AC_SUBST(libc_cv_have_ksh)
898 AC_PROG_AWK
899 AC_PATH_PROG(PERL, perl, no)
900 if test "$PERL" != no &&
901 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
902 PERL=no
903 fi
904 AC_PATH_PROG(INSTALL_INFO, install-info, no,
905 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
906 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
908 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
909 echo '#include <stddef.h>
910 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
911 if eval "$ac_cpp conftest.c 2>/dev/null" \
912 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
913 libc_cv_signed_size_t=no
914 else
915 libc_cv_signed_size_t=yes
916 fi
917 rm -f conftest*])
918 if test $libc_cv_signed_size_t = yes; then
919 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
920 cat >> confdefs.h <<\EOF
921 #undef __SIZE_TYPE__
922 #define __SIZE_TYPE__ unsigned
923 EOF
924 fi
926 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
927 AC_TRY_COMPILE(dnl
928 [#define __need_size_t
929 #define __need_wchar_t
930 #include <stddef.h>
931 #define __need_NULL
932 #include <stddef.h>], [size_t size; wchar_t wchar;
933 #ifdef offsetof
934 #error stddef.h ignored __need_*
935 #endif
936 if (&size == NULL || &wchar == NULL) abort ();],
937 libc_cv_friendly_stddef=yes,
938 libc_cv_friendly_stddef=no)])
939 if test $libc_cv_friendly_stddef = yes; then
940 config_vars="$config_vars
941 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
942 fi
944 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
945 libc_cv_need_minus_P, [dnl
946 cat > conftest.S <<EOF
947 #include "confdefs.h"
948 /* Nothing whatsoever. */
949 EOF
950 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
951 libc_cv_need_minus_P=no
952 else
953 libc_cv_need_minus_P=yes
954 fi
955 rm -f conftest*])
956 if test $libc_cv_need_minus_P = yes; then
957 config_vars="$config_vars
958 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
959 fi
961 AC_MSG_CHECKING(whether .text pseudo-op must be used)
962 AC_CACHE_VAL(libc_cv_dot_text, [dnl
963 cat > conftest.s <<EOF
964 .text
965 EOF
966 libc_cv_dot_text=
967 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
968 libc_cv_dot_text=.text
969 fi
970 rm -f conftest*])
971 if test -z "$libc_cv_dot_text"; then
972 AC_MSG_RESULT(no)
973 else
974 AC_MSG_RESULT(yes)
975 fi
977 AC_CACHE_CHECK(for assembler global-symbol directive,
978 libc_cv_asm_global_directive, [dnl
979 libc_cv_asm_global_directive=UNKNOWN
980 for ac_globl in .globl .global .EXPORT; do
981 cat > conftest.s <<EOF
982 ${libc_cv_dot_text}
983 ${ac_globl} foo
984 foo:
985 EOF
986 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
987 libc_cv_asm_global_directive=${ac_globl}
988 fi
989 rm -f conftest*
990 test $libc_cv_asm_global_directive != UNKNOWN && break
991 done])
992 if test $libc_cv_asm_global_directive = UNKNOWN; then
993 AC_MSG_ERROR(cannot determine asm global directive)
994 else
995 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
996 fi
998 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
999 cat > conftest.s <<EOF
1000 ${libc_cv_dot_text}
1001 foo:
1002 .set glibc_conftest_frobozz,foo
1003 $libc_cv_asm_global_directive glibc_conftest_frobozz
1004 EOF
1005 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1006 # (but it doesn't work), so we must do a linking check to be sure.
1007 cat > conftest1.c <<\EOF
1008 extern int glibc_conftest_frobozz;
1009 void _start() { glibc_conftest_frobozz = 1; }
1010 EOF
1011 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1012 -nostartfiles -nostdlib \
1013 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1014 libc_cv_asm_set_directive=yes
1015 else
1016 libc_cv_asm_set_directive=no
1017 fi
1018 rm -f conftest*])
1019 if test $libc_cv_asm_set_directive = yes; then
1020 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1021 fi
1023 AC_CACHE_CHECK(for assembler .type directive prefix,
1024 libc_cv_asm_type_prefix, [dnl
1025 libc_cv_asm_type_prefix=no
1026 for ac_try_prefix in '@' '%' '#'; do
1027 cat > conftest.s <<EOF
1028 ${libc_cv_dot_text}
1029 ${libc_cv_asm_global_directive} foo
1030 .type foo, ${ac_try_prefix}object
1031 .size foo, 1
1032 foo:
1033 .byte 1
1034 EOF
1035 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1036 libc_cv_asm_type_prefix=${ac_try_prefix}
1037 fi
1038 rm -f conftest*
1039 test "x$libc_cv_asm_type_prefix" != xno && break
1040 done])
1041 if test "x$libc_cv_asm_type_prefix" != xno; then
1042 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
1043 fi
1045 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1046 [cat > conftest.s <<EOF
1047 ${libc_cv_dot_text}
1048 _sym:
1049 .symver _sym,sym@VERS
1050 EOF
1051 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1052 libc_cv_asm_symver_directive=yes
1053 else
1054 libc_cv_asm_symver_directive=no
1055 fi
1056 rm -f conftest*])
1057 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1058 if test $libc_cv_asm_symver_directive = yes; then
1059 cat > conftest.s <<EOF
1060 ${libc_cv_dot_text}
1061 _sym:
1062 .symver _sym,sym@VERS
1063 EOF
1064 cat > conftest.map <<EOF
1065 VERS_1 {
1066 global: sym;
1067 };
1069 VERS_2 {
1070 global: sym;
1071 } VERS_1;
1072 EOF
1073 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1074 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1075 -o conftest.so conftest.o
1076 -nostartfiles -nostdlib
1077 -Wl,--version-script,conftest.map
1078 1>&AS_MESSAGE_LOG_FD]);
1079 then
1080 libc_cv_ld_version_script_option=yes
1081 else
1082 libc_cv_ld_version_script_option=no
1083 fi
1084 else
1085 libc_cv_ld_version_script_option=no
1086 fi
1087 else
1088 libc_cv_ld_version_script_option=no
1089 fi
1090 rm -f conftest*])
1091 if test $shared != no &&
1092 test $libc_cv_asm_symver_directive = yes &&
1093 test $libc_cv_ld_version_script_option = yes &&
1094 test $enable_versioning = yes; then
1095 VERSIONING=yes
1096 AC_DEFINE(DO_VERSIONING)
1097 else
1098 VERSIONING=no
1099 fi
1100 AC_SUBST(VERSIONING)
1102 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1103 echo "\
1104 *** WARNING: You should not compile GNU libc without versioning. Not using
1105 *** versioning will introduce incompatibilities so that old binaries
1106 *** will not run anymore.
1107 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1108 fi
1109 if test $elf = yes; then
1110 AC_CACHE_CHECK(for .previous assembler directive,
1111 libc_cv_asm_previous_directive, [dnl
1112 cat > conftest.s <<EOF
1113 .section foo_section
1114 .previous
1115 EOF
1116 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1117 libc_cv_asm_previous_directive=yes
1118 else
1119 libc_cv_asm_previous_directive=no
1120 fi
1121 rm -f conftest*])
1122 if test $libc_cv_asm_previous_directive = yes; then
1123 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1124 else
1125 AC_CACHE_CHECK(for .popsection assembler directive,
1126 libc_cv_asm_popsection_directive, [dnl
1127 cat > conftest.s <<EOF
1128 .pushsection foo_section
1129 .popsection
1130 EOF
1131 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1132 libc_cv_asm_popsection_directive=yes
1133 else
1134 libc_cv_asm_popsection_directive=no
1135 fi
1136 rm -f conftest*])
1137 if test $libc_cv_asm_popsection_directive = yes; then
1138 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1139 fi
1140 fi
1141 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1142 libc_cv_asm_protected_directive, [dnl
1143 cat > conftest.s <<EOF
1144 .protected foo
1145 foo:
1146 .hidden bar
1147 bar:
1148 EOF
1149 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1150 libc_cv_asm_protected_directive=yes
1151 else
1152 libc_cv_asm_protected_directive=no
1153 fi
1154 rm -f conftest*])
1155 AC_SUBST(libc_cv_asm_protected_directive)
1156 AC_DEFINE(HAVE_PROTECTED)
1157 AC_DEFINE(HAVE_HIDDEN)
1159 if test $libc_cv_asm_protected_directive = yes; then
1160 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1161 libc_cv_visibility_attribute,
1162 [cat > conftest.c <<EOF
1163 int foo __attribute__ ((visibility ("hidden"))) = 1;
1164 int bar __attribute__ ((visibility ("protected"))) = 1;
1165 EOF
1166 libc_cv_visibility_attribute=no
1167 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1168 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1169 if grep '\.protected.*bar' conftest.s >/dev/null; then
1170 libc_cv_visibility_attribute=yes
1171 fi
1172 fi
1173 fi
1174 rm -f conftest.[cs]
1175 ])
1176 if test $libc_cv_visibility_attribute = yes; then
1177 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1178 fi
1179 fi
1181 if test $libc_cv_visibility_attribute = yes; then
1182 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1183 libc_cv_broken_visibility_attribute,
1184 [cat > conftest.c <<EOF
1185 int foo (int x);
1186 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1187 int bar (int x) { return x; }
1188 EOF
1189 libc_cv_broken_visibility_attribute=yes
1190 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
1191 changequote(,)dnl
1192 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1193 changequote([,])dnl
1194 libc_cv_broken_visibility_attribute=no
1195 fi
1196 fi
1197 rm -f conftest.c conftest.s
1198 ])
1199 if test $libc_cv_broken_visibility_attribute = yes; then
1200 AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
1201 fi
1202 fi
1204 AC_CACHE_CHECK(for broken __attribute__((alias())),
1205 libc_cv_broken_alias_attribute,
1206 [cat > conftest.c <<EOF
1207 extern int foo (int x) __asm ("xyzzy");
1208 int bar (int x) { return x; }
1209 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1210 extern int dfoo;
1211 extern __typeof (dfoo) dfoo __asm ("abccb");
1212 int dfoo = 1;
1213 EOF
1214 libc_cv_broken_alias_attribute=yes
1215 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1216 if grep 'xyzzy' conftest.s >/dev/null &&
1217 grep 'abccb' conftest.s >/dev/null; then
1218 libc_cv_broken_alias_attribute=no
1219 fi
1220 fi
1221 rm -f conftest.c conftest.s
1222 ])
1223 if test $libc_cv_broken_alias_attribute = yes; then
1224 AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
1225 fi
1227 if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
1228 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1229 libc_cv_have_sdata_section,
1230 [echo "int i;" > conftest.c
1231 libc_cv_have_sdata_section=no
1232 if ${CC-cc} $LDFLAGS -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1233 | grep '\.sdata' >/dev/null; then
1234 libc_cv_have_sdata_section=yes
1235 fi
1236 rm -f conftest.c conftest.so
1237 ])
1238 if test $libc_cv_have_sdata_section = yes; then
1239 AC_DEFINE(HAVE_SDATA_SECTION)
1240 fi
1241 fi
1243 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1244 libc_cv_initfinit_array, [dnl
1245 cat > conftest.c <<EOF
1246 int _start (void) { return 0; }
1247 int __start (void) { return 0; }
1248 int foo (void) { return 1; }
1249 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1250 EOF
1251 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1252 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1253 then
1254 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1255 libc_cv_initfinit_array=yes
1256 else
1257 libc_cv_initfinit_array=no
1258 fi
1259 else
1260 libc_cv_initfinit_array=no
1261 fi
1262 rm -f conftest*])
1263 AC_SUBST(libc_cv_initfinit_array)
1264 if test $libc_cv_initfinit_array = yes; then
1265 AC_DEFINE(HAVE_INITFINI_ARRAY)
1266 fi
1268 AC_CACHE_CHECK(for libunwind-support in compiler,
1269 libc_cv_cc_with_libunwind, [
1270 cat > conftest.c <<EOF
1271 int main (void) { return 0; }
1272 EOF
1273 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1274 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1275 libc_cv_cc_with_libunwind=yes
1276 else
1277 libc_cv_cc_with_libunwind=no
1278 fi
1279 rm -f conftest*])
1280 AC_SUBST(libc_cv_cc_with_libunwind)
1281 if test $libc_cv_cc_with_libunwind = yes; then
1282 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1283 fi
1285 AC_CACHE_CHECK(for -z nodelete option,
1286 libc_cv_z_nodelete, [dnl
1287 cat > conftest.c <<EOF
1288 int _start (void) { return 42; }
1289 EOF
1290 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1291 -shared -o conftest.so conftest.c
1292 -nostartfiles -nostdlib
1293 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1294 then
1295 libc_cv_z_nodelete=yes
1296 else
1297 libc_cv_z_nodelete=no
1298 fi
1299 rm -f conftest*])
1300 AC_SUBST(libc_cv_z_nodelete)
1302 AC_CACHE_CHECK(for -z nodlopen option,
1303 libc_cv_z_nodlopen, [dnl
1304 cat > conftest.c <<EOF
1305 int _start (void) { return 42; }
1306 EOF
1307 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1308 -shared -o conftest.so conftest.c
1309 -nostartfiles -nostdlib
1310 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1311 then
1312 libc_cv_z_nodlopen=yes
1313 else
1314 libc_cv_z_nodlopen=no
1315 fi
1316 rm -f conftest*])
1317 AC_SUBST(libc_cv_z_nodlopen)
1319 AC_CACHE_CHECK(for -z initfirst option,
1320 libc_cv_z_initfirst, [dnl
1321 cat > conftest.c <<EOF
1322 int _start (void) { return 42; }
1323 EOF
1324 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1325 -shared -o conftest.so conftest.c
1326 -nostartfiles -nostdlib
1327 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1328 then
1329 libc_cv_z_initfirst=yes
1330 else
1331 libc_cv_z_initfirst=no
1332 fi
1333 rm -f conftest*])
1334 AC_SUBST(libc_cv_z_initfirst)
1336 AC_CACHE_CHECK(for -z relro option,
1337 libc_cv_z_relro, [dnl
1338 libc_cv_z_relro=no
1339 if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
1340 then
1341 if AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep DATA_SEGMENT_RELRO_END 1>&AS_MESSAGE_LOG_FD])
1342 then
1343 libc_cv_z_relro=yes
1344 fi
1345 fi])
1346 AC_SUBST(libc_cv_z_relro)
1347 if test $libc_cv_z_relro = yes; then
1348 AC_DEFINE(HAVE_Z_RELRO)
1349 fi
1351 AC_CACHE_CHECK(for -Bgroup option,
1352 libc_cv_Bgroup, [dnl
1353 cat > conftest.c <<EOF
1354 int _start (void) { return 42; }
1355 EOF
1356 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1357 -shared -o conftest.so conftest.c
1358 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1359 then
1360 libc_cv_Bgroup=yes
1361 else
1362 libc_cv_Bgroup=no
1363 fi
1364 rm -f conftest*])
1365 AC_SUBST(libc_cv_Bgroup)
1367 AC_CACHE_CHECK(for libgcc_s suffix,
1368 libc_cv_libgcc_s_suffix, [dnl
1369 cat > conftest.c <<EOF
1370 int main (void) { return 0; }
1371 EOF
1372 changequote(,)dnl
1373 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1374 -shared -shared-libgcc -o conftest.so \
1375 conftest.c -v 2>&1 >/dev/null \
1376 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1377 changequote([,])dnl
1378 rm -f conftest*])
1379 AC_SUBST(libc_cv_libgcc_s_suffix)
1381 AC_CACHE_CHECK(for --as-needed option,
1382 libc_cv_as_needed, [dnl
1383 cat > conftest.c <<EOF
1384 int main (void) { return 0; }
1385 EOF
1386 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1387 -shared -o conftest.so conftest.c
1388 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1389 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1390 then
1391 libc_cv_as_needed=yes
1392 else
1393 libc_cv_as_needed=no
1394 fi
1395 rm -f conftest*])
1396 AC_SUBST(libc_cv_as_needed)
1398 ASFLAGS_config=
1399 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1400 libc_cv_as_noexecstack, [dnl
1401 cat > conftest.c <<EOF
1402 void foo (void) { }
1403 EOF
1404 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1405 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1406 && grep -q .note.GNU-stack conftest.s \
1407 && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wa,--noexecstack
1408 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1409 then
1410 libc_cv_as_noexecstack=yes
1411 else
1412 libc_cv_as_noexecstack=no
1413 fi
1414 rm -f conftest*])
1415 if test $libc_cv_as_noexecstack = yes; then
1416 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1417 fi
1418 AC_SUBST(ASFLAGS_config)
1420 AC_CACHE_CHECK(for -z combreloc,
1421 libc_cv_z_combreloc, [dnl
1422 cat > conftest.c <<EOF
1423 extern int bar (int);
1424 extern int mumble;
1425 int foo (void) { return bar (mumble); }
1426 EOF
1427 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1428 -shared -o conftest.so conftest.c
1429 -nostdlib -nostartfiles
1430 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1431 then
1432 dnl The following test is a bit weak. We must use a tool which can test
1433 dnl cross-platform since the gcc used can be a cross compiler. Without
1434 dnl introducing new options this is not easily doable. Instead use a tool
1435 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1436 dnl look for a section named .rel.dyn.
1437 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1438 libc_cv_z_combreloc=yes
1439 else
1440 libc_cv_z_combreloc=no
1441 fi
1442 else
1443 libc_cv_z_combreloc=no
1444 fi
1445 rm -f conftest*])
1446 if test "$libc_cv_z_combreloc" = yes; then
1447 AC_DEFINE(HAVE_Z_COMBRELOC)
1448 fi
1449 AC_SUBST(libc_cv_z_combreloc)
1451 AC_CACHE_CHECK(for -z execstack,
1452 libc_cv_z_execstack, [dnl
1453 cat > conftest.c <<EOF
1454 int _start (void) { return 42; }
1455 EOF
1456 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1457 -shared -o conftest.so conftest.c
1458 -Wl,-z,execstack -nostdlib
1459 1>&AS_MESSAGE_LOG_FD])
1460 then
1461 libc_cv_z_execstack=yes
1462 else
1463 libc_cv_z_execstack=no
1464 fi
1465 rm -f conftest*])
1466 AC_SUBST(libc_cv_z_execstack)
1468 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1469 cat > conftest.c <<EOF
1470 int foo;
1471 main () { return 0;}
1472 EOF
1473 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1474 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1475 then
1476 libc_cv_fpie=yes
1477 else
1478 libc_cv_fpie=no
1479 fi
1480 rm -f conftest*])
1482 AC_SUBST(libc_cv_fpie)
1483 fi
1485 AC_CACHE_CHECK(for -fno-unit-at-a-time, libc_cv_fno_unit_at_a_time, [dnl
1486 cat > conftest.c <<EOF
1487 int foo;
1488 EOF
1489 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-unit-at-a-time
1490 conftest.c 1>&AS_MESSAGE_LOG_FD])
1491 then
1492 libc_cv_fno_unit_at_a_time=yes
1493 else
1494 libc_cv_fno_unit_at_a_time=no
1495 fi
1496 rm -f conftest*])
1497 if test $libc_cv_fno_unit_at_a_time = yes; then
1498 fno_unit_at_a_time=-fno-unit-at-a-time
1499 fi
1500 AC_SUBST(fno_unit_at_a_time)
1502 if test $elf != yes; then
1503 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1504 [AC_TRY_COMPILE(, [asm (".section .init");
1505 asm (".section .fini");
1506 asm ("${libc_cv_dot_text}");],
1507 libc_cv_have_initfini=yes,
1508 libc_cv_have_initfini=no)])
1509 AC_SUBST(libc_cv_have_initfini)dnl
1510 if test $libc_cv_have_initfini = yes; then
1511 AC_DEFINE(HAVE_INITFINI)
1512 fi
1513 fi
1515 if test $elf = yes -a $gnu_ld = yes; then
1516 AC_CACHE_CHECK(whether cc puts quotes around section names,
1517 libc_cv_have_section_quotes,
1518 [cat > conftest.c <<EOF
1519 static const int foo
1520 __attribute__ ((section ("bar"))) = 1;
1521 EOF
1522 if ${CC-cc} -S conftest.c -o conftest.s; then
1523 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1524 libc_cv_have_section_quotes=yes
1525 else
1526 libc_cv_have_section_quotes=no
1527 fi
1528 else
1529 libc_cv_have_section_quotes=unknown
1530 fi
1531 rm -f conftest.[cs]
1532 ])
1533 if test $libc_cv_have_section_quotes = yes; then
1534 AC_DEFINE(HAVE_SECTION_QUOTES)
1535 fi
1536 fi
1538 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1539 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1540 [cat > conftest.$ac_ext <<EOF
1541 dnl This sometimes fails to find confdefs.h, for some reason.
1542 dnl [#]line $LINENO "[$]0"
1543 [#]line $LINENO "configure"
1544 #include "confdefs.h"
1545 void underscore_test(void) {
1546 return; }
1547 EOF
1548 if AC_TRY_EVAL(ac_compile); then
1549 if grep _underscore_test conftest* >/dev/null; then
1550 ifelse([$1], , :, [rm -f conftest*
1551 $1])
1552 else
1553 ifelse([$2], , , [rm -f conftest*
1554 $2])
1555 fi
1556 else
1557 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1558 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1559 ifelse([$2], , , [rm -f conftest*
1560 $2])
1561 fi
1562 rm -f conftest*])
1564 if test $elf = yes; then
1565 libc_cv_asm_underscores=no
1566 else
1567 if test $ac_cv_prog_cc_works = yes; then
1568 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1569 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1570 libc_cv_asm_underscores=yes,
1571 libc_cv_asm_underscores=no)])
1572 else
1573 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1574 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1575 libc_cv_asm_underscores=no)])
1576 fi
1577 fi
1578 if test $libc_cv_asm_underscores = no; then
1579 AC_DEFINE(NO_UNDERSCORES)
1580 fi
1582 if test $elf = yes; then
1583 libc_cv_weak_symbols=yes
1584 fi
1586 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1587 [dnl
1588 cat > conftest.s <<EOF
1589 ${libc_cv_dot_text}
1590 ${libc_cv_asm_global_directive} foo
1591 foo:
1592 .weak foo
1593 .weak bar; bar = foo
1594 EOF
1595 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1596 libc_cv_asm_weak_directive=yes
1597 else
1598 libc_cv_asm_weak_directive=no
1599 fi
1600 rm -f conftest*])
1602 if test $libc_cv_asm_weak_directive = no; then
1603 AC_CACHE_CHECK(for assembler .weakext directive,
1604 libc_cv_asm_weakext_directive,
1605 [dnl
1606 cat > conftest.s <<EOF
1607 ${libc_cv_dot_text}
1608 ${libc_cv_asm_global_directive} foo
1609 foo:
1610 .weakext bar foo
1611 .weakext baz
1612 ${libc_cv_asm_global_directive} baz
1613 baz:
1614 EOF
1615 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1616 libc_cv_asm_weakext_directive=yes
1617 else
1618 libc_cv_asm_weakext_directive=no
1619 fi
1620 rm -f conftest*])
1622 fi # no .weak
1624 if test $libc_cv_asm_weak_directive = yes; then
1625 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1626 elif test $libc_cv_asm_weakext_directive = yes; then
1627 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1628 fi
1630 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1631 cat > conftest.s <<EOF
1632 .text
1633 .type func,%function
1634 func:
1635 .cfi_startproc
1636 .cfi_remember_state
1637 .cfi_rel_offset 1, 0
1638 .cfi_endproc
1639 EOF
1640 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1641 libc_cv_asm_cfi_directives=yes
1642 else
1643 libc_cv_asm_cfi_directives=no
1644 fi
1645 rm -f conftest*])
1646 if test $libc_cv_asm_cfi_directives = yes; then
1647 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1648 fi
1650 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1651 cat > conftest.c <<\EOF
1652 _start () {}
1653 int __eh_pc;
1654 __throw () {}
1655 EOF
1656 dnl No \ in command here because it ends up inside ''.
1657 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1658 -nostdlib -nostartfiles -Wl,--no-whole-archive
1659 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1660 libc_cv_ld_no_whole_archive=yes
1661 else
1662 libc_cv_ld_no_whole_archive=no
1663 fi
1664 rm -f conftest*])
1665 if test $libc_cv_ld_no_whole_archive = yes; then
1666 no_whole_archive=-Wl,--no-whole-archive
1667 fi
1668 AC_SUBST(no_whole_archive)dnl
1670 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1671 cat > conftest.c <<\EOF
1672 _start () {}
1673 int __eh_pc;
1674 __throw () {}
1675 EOF
1676 dnl No \ in command here because it ends up inside ''.
1677 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1678 -nostdlib -nostartfiles -fexceptions
1679 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1680 libc_cv_gcc_exceptions=yes
1681 else
1682 libc_cv_gcc_exceptions=no
1683 fi
1684 rm -f conftest*])
1685 if test $libc_cv_gcc_exceptions = yes; then
1686 exceptions=-fexceptions
1687 fi
1688 AC_SUBST(exceptions)dnl
1690 if test "$host_cpu" = powerpc ; then
1691 # Check for a bug present in at least versions 2.8.x of GCC
1692 # and versions 1.0.x of EGCS.
1693 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1694 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1695 libc_cv_c_asmcr0_bug='no',
1696 libc_cv_c_asmcr0_bug='yes')])
1697 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1698 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1699 fi
1700 fi
1702 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1703 [cat > conftest.c <<EOF
1704 #line $LINENO "configure"
1705 static char *__EH_FRAME_BEGIN__;
1706 _start ()
1707 {
1708 #ifdef CHECK__register_frame
1709 __register_frame (__EH_FRAME_BEGIN__);
1710 __deregister_frame (__EH_FRAME_BEGIN__);
1711 #endif
1712 #ifdef CHECK__register_frame_info
1713 __register_frame_info (__EH_FRAME_BEGIN__);
1714 __deregister_frame_info (__EH_FRAME_BEGIN__);
1715 #endif
1716 }
1717 int __eh_pc;
1718 __throw () {}
1719 /* FIXME: this is fragile. */
1720 malloc () {}
1721 strcmp () {}
1722 strlen () {}
1723 memcpy () {}
1724 memset () {}
1725 free () {}
1726 abort () {}
1727 __bzero () {}
1728 dl_iterate_phdr () {}
1729 EOF
1730 libc_unwind_check="${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame_info \
1731 $LDFLAGS \
1732 -nostdlib -nostartfiles -o conftest conftest.c \
1733 -lgcc"
1734 # Some platforms' specs put -lgcc first. The second one doesn't hurt.
1735 if AC_TRY_COMMAND([$libc_unwind_check >&AS_MESSAGE_LOG_FD]) ||
1736 AC_TRY_COMMAND([$libc_unwind_check -lgcc_eh -lgcc >&AS_MESSAGE_LOG_FD])
1737 then
1738 if $libc_unwind_check -v 2>&1 >/dev/null \
1739 | grep -- --eh-frame-hdr 2>&1 >/dev/null; then
1740 libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
1741 else
1742 libc_cv_gcc_dwarf2_unwind_info=static
1743 fi
1744 else
1745 libc_cv_gcc_dwarf2_unwind_info=no
1746 fi
1747 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1748 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame
1749 $LDFLAGS -nostdlib -nostartfiles
1750 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1751 libc_cv_gcc_dwarf2_unwind_info=yes
1752 else
1753 libc_cv_gcc_dwarf2_unwind_info=no
1754 fi
1755 fi
1756 rm -f conftest*])
1757 case $libc_cv_gcc_dwarf2_unwind_info in
1758 yes)
1759 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1760 ;;
1761 static)
1762 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1763 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1764 ;;
1765 esac
1767 dnl Check whether compiler understands __builtin_expect.
1768 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1769 [cat > conftest.c <<EOF
1770 #line $LINENO "configure"
1771 int foo (int a)
1772 {
1773 a = __builtin_expect (a, 10);
1774 return a == 10 ? 0 : 1;
1775 }
1776 EOF
1777 dnl No \ in command here because it ends up inside ''.
1778 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1779 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1780 libc_cv_gcc_builtin_expect=yes
1781 else
1782 libc_cv_gcc_builtin_expect=no
1783 fi
1784 rm -f conftest*])
1785 if test "$libc_cv_gcc_builtin_expect" = yes; then
1786 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1787 fi
1789 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1790 cat > conftest.c <<\EOF
1791 void zero (void *x)
1792 {
1793 __builtin_memset (x, 0, 1000);
1794 }
1795 EOF
1796 dnl
1797 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1798 then
1799 libc_cv_gcc_builtin_memset=no
1800 else
1801 libc_cv_gcc_builtin_memset=yes
1802 fi
1803 rm -f conftest* ])
1804 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1805 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1806 fi
1808 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1809 cat > conftest.c <<\EOF
1810 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1811 char *foo (const char *a, const char *b)
1812 {
1813 return __builtin_strstr (a, b);
1814 }
1815 EOF
1816 dnl
1817 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1818 then
1819 libc_cv_gcc_builtin_redirection=yes
1820 else
1821 libc_cv_gcc_builtin_redirection=no
1822 fi
1823 rm -f conftest* ])
1824 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
1825 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
1826 fi
1828 dnl Check whether the compiler supports subtraction of local labels.
1829 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1830 [cat > conftest.c <<EOF
1831 changequote(,)dnl
1832 #line $LINENO "configure"
1833 int foo (int a)
1834 {
1835 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1836 void *p = &&l1 + ar[a];
1837 goto *p;
1838 l1:
1839 return 1;
1840 l2:
1841 return 2;
1842 }
1843 changequote([,])dnl
1844 EOF
1845 dnl No \ in command here because it ends up inside ''.
1846 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1847 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1848 libc_cv_gcc_subtract_local_labels=yes
1849 else
1850 libc_cv_gcc_subtract_local_labels=no
1851 fi
1852 rm -f conftest*])
1853 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1854 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1855 fi
1857 dnl Check whether the compiler supports the __thread keyword.
1858 if test "x$use__thread" != xno; then
1859 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1860 [cat > conftest.c <<\EOF
1861 __thread int a = 42;
1862 EOF
1863 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1864 libc_cv_gcc___thread=yes
1865 else
1866 libc_cv_gcc___thread=no
1867 fi
1868 rm -f conftest*])
1869 if test "$libc_cv_gcc___thread" = yes; then
1870 AC_DEFINE(HAVE___THREAD)
1871 fi
1872 else
1873 libc_cv_gcc___thread=no
1874 fi
1876 if test "$libc_cv_gcc___thread" = yes; then
1877 dnl Check whether the compiler supports the tls_model attribute.
1878 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1879 cat > conftest.c <<\EOF
1880 extern __thread int a __attribute__((tls_model ("initial-exec")));
1881 EOF
1882 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1883 libc_cv_gcc_tls_model_attr=yes
1884 else
1885 libc_cv_gcc_tls_model_attr=no
1886 fi
1887 rm -f conftest*])
1888 if test "$libc_cv_gcc_tls_model_attr" = yes; then
1889 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
1890 fi
1891 fi
1893 dnl Check whether we have the gd library available.
1894 AC_MSG_CHECKING(for libgd)
1895 if test "$with_gd" != "no"; then
1896 old_CFLAGS="$CFLAGS"
1897 CFLAGS="$CFLAGS $libgd_include"
1898 old_LDFLAGS="$LDFLAGS"
1899 LDFLAGS="$LDFLAGS $libgd_ldflags"
1900 old_LIBS="$LIBS"
1901 LIBS="$LIBS -lgd -lpng -lz -lm"
1902 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1903 CFLAGS="$old_CFLAGS"
1904 LDFLAGS="$old_LDFLAGS"
1905 LIBS="$old_LIBS"
1906 else
1907 LIBGD=no
1908 fi
1909 AC_MSG_RESULT($LIBGD)
1910 AC_SUBST(LIBGD)
1912 # SELinux detection
1913 if test x$with_selinux = xno ; then
1914 have_selinux=no;
1915 else
1916 # See if we have the SELinux library
1917 AC_CHECK_LIB(selinux, is_selinux_enabled,
1918 have_selinux=yes, have_selinux=no)
1919 # See if we have the SELinux header with the NSCD permissions in it.
1920 if test x$have_selinux = xyes ; then
1921 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
1922 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
1923 [#ifdef NSCD__SHMEMHOST
1924 return 0;
1925 #else
1926 #error NSCD__SHMEMHOST not defined
1927 #endif],
1928 have_selinux=yes, have_selinux=no)
1929 AC_MSG_RESULT($have_selinux)
1930 fi
1932 if test x$with_selinux = xyes ; then
1933 if test x$have_selinux = xno ; then
1934 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
1935 fi
1936 fi
1937 fi
1938 # Check if we're building with SELinux support.
1939 if test "x$have_selinux" = xyes; then
1940 AC_DEFINE(HAVE_SELINUX,1,[SELinux support])
1941 fi
1942 AC_SUBST(have_selinux)
1944 dnl check for the size of 'long double'.
1945 AC_CHECK_SIZEOF(long double, 0)
1946 sizeof_long_double=$ac_cv_sizeof_long_double
1947 AC_SUBST(sizeof_long_double)
1949 ### End of automated tests.
1950 ### Now run sysdeps configure fragments.
1952 # They also can set these variables.
1953 use_ldconfig=no
1954 ldd_rewrite_script=no
1955 libc_cv_sysconfdir=$sysconfdir
1956 libc_cv_gcc_unwind_find_fde=no
1957 libc_cv_idn=no
1959 # Iterate over all the sysdep directories we will use, running their
1960 # configure fragments, and looking for a uname implementation.
1961 uname=
1962 for dir in $sysnames; do
1963 case $dir in
1964 /*) dest=$dir ;;
1965 *) dest=$srcdir/$dir ;;
1966 esac
1967 if test -r $dest/configure; then
1968 AC_MSG_RESULT(running configure fragment for $dir)
1969 . $dest/configure
1970 fi
1971 [
1972 if test -z "$uname"; then
1973 if test -r $dest/uname.c ||
1974 test -r $dest/uname.S ||
1975 { test -r $dest/syscalls.list &&
1976 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1977 uname=$dir
1978 fi
1979 fi
1980 ]dnl
1981 done
1983 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
1984 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
1985 fi
1986 AC_SUBST(libc_cv_gcc_unwind_find_fde)
1988 # If we will use the generic uname implementation, we must figure out what
1989 # it will say by examining the system, and write the results in config-name.h.
1990 if test "$uname" = "sysdeps/generic"; then
1992 changequote(,)dnl
1993 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1994 changequote([,])dnl
1995 if test $uname_sysname != $config_os; then
1996 config_release=`echo $config_os | sed s/$uname_sysname//`
1997 fi
1998 dnl
1999 AC_DEFUN(LIBC_KERNEL_ID, [dnl
2000 if test -r /vmunix; then
2001 kernel_id=`strings /vmunix | grep UNIX`
2002 elif test -r /dynix; then
2003 kernel_id=`strings /dynix | grep DYNIX`
2004 else
2005 kernel_id=
2006 fi
2007 ])dnl
2009 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
2010 LIBC_KERNEL_ID
2011 changequote(,)dnl
2012 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
2013 changequote([,])dnl
2014 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
2015 != x$config_release; then
2016 # The configuration release is a substring of the kernel release.
2017 libc_cv_uname_release=$kernel_release
2018 elif test x$config_release != x; then
2019 libc_cv_uname_release=$config_release
2020 elif test x$kernel_release != x; then
2021 libc_cv_uname_release=$kernel_release
2022 else
2023 libc_cv_uname_release=unknown
2024 fi])
2025 uname_release="$libc_cv_uname_release"
2027 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
2028 LIBC_KERNEL_ID
2029 changequote(,)dnl
2030 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
2031 changequote([,])dnl
2032 if test -n "$kernel_version"; then
2033 libc_cv_uname_version="$kernel_version"
2034 else
2035 libc_cv_uname_version=unknown
2036 fi])
2037 uname_version="$libc_cv_uname_version"
2039 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
2040 config_uname=config-name.h:config-name.in
2041 else
2042 # For non-generic uname, we don't need to create config-name.h at all.
2043 config_uname=
2044 fi
2046 dnl This is tested by existing code and it's simpler to avoid changing it.
2047 AC_DEFINE(USE_IN_LIBIO)
2049 # Test for old glibc 2.0.x headers so that they can be removed properly
2050 # Search only in includedir.
2051 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2052 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2053 then
2054 old_glibc_headers=yes
2055 else
2056 old_glibc_headers=no
2057 fi
2058 AC_MSG_RESULT($old_glibc_headers)
2059 if test ${old_glibc_headers} = yes; then
2060 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2061 AC_MSG_WARN(*** be removed.)
2062 fi
2063 AC_SUBST(old_glibc_headers)
2065 AC_SUBST(libc_cv_slibdir)
2066 AC_SUBST(libc_cv_localedir)
2067 AC_SUBST(libc_cv_sysconfdir)
2068 AC_SUBST(libc_cv_rootsbindir)
2069 AC_SUBST(libc_cv_forced_unwind)
2071 AC_SUBST(use_ldconfig)
2072 AC_SUBST(ldd_rewrite_script)
2074 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
2075 if test $gnu_ld = yes; then
2076 AC_DEFINE(HAVE_GNU_LD)
2077 fi
2078 if test $gnu_as = yes; then
2079 AC_DEFINE(HAVE_GNU_AS)
2080 fi
2081 if test $elf = yes; then
2082 AC_DEFINE(HAVE_ELF)
2083 fi
2084 if test $xcoff = yes; then
2085 AC_DEFINE(HAVE_XCOFF)
2086 fi
2088 AC_SUBST(static)
2089 AC_SUBST(shared)
2090 if test $shared = default; then
2091 if test $gnu_ld = yes; then
2092 shared=$elf
2093 else
2094 # For now we do not assume shared libs are available. In future more
2095 # tests might become available.
2096 shared=no
2097 fi
2098 fi
2100 if test x"$libc_cv_idn" = xyes; then
2101 AC_DEFINE(HAVE_LIBIDN)
2102 fi
2104 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
2105 [pic_default=yes
2106 cat > conftest.c <<EOF
2107 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2108 # error PIC is default.
2109 #endif
2110 EOF
2111 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2112 pic_default=no
2113 fi
2114 rm -f conftest.*])
2115 AC_SUBST(pic_default)
2117 AC_SUBST(profile)
2118 AC_SUBST(omitfp)
2119 AC_SUBST(bounded)
2120 AC_SUBST(static_nss)
2121 AC_SUBST(nopic_initfini)
2123 AC_SUBST(DEFINES)
2125 dnl See sysdeps/mach/configure.in for this variable.
2126 AC_SUBST(mach_interface_list)
2128 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2129 config_makefile=
2130 else
2131 config_makefile=Makefile
2132 fi
2134 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2135 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2136 AC_SUBST(VERSION)
2137 AC_SUBST(RELEASE)
2139 AC_CONFIG_FILES([config.make ${config_makefile} ${config_uname}])
2140 AC_CONFIG_COMMANDS([default],[[
2141 case $CONFIG_FILES in *config.make*)
2142 echo "$config_vars" >> config.make;;
2143 esac
2144 test -d bits || mkdir bits]],[[config_vars='$config_vars']])
2145 AC_OUTPUT