| blob | e6a5abb54cf7c5d04ffe28afeb9c7fa0d4011f4f |
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 $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
10 AC_MSG_ERROR([you must configure in a separate build directory])
11 fi
13 # This will get text that should go into config.make.
14 config_vars=
16 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
17 AC_ARG_WITH([gd],
18 AC_HELP_STRING([--with-gd=DIR],
19 [find libgd include dir and library with prefix DIR]),
20 [dnl
21 case "$with_gd" in
22 yes|''|no) ;;
23 *) libgd_include="-I$withval/include"
24 libgd_ldflags="-L$withval/lib" ;;
25 esac
26 ])
27 AC_ARG_WITH([gd-include],
28 AC_HELP_STRING([--with-gd-include=DIR],
29 [find libgd include files in DIR]),
30 [dnl
31 case "$with_gd_include" in
32 ''|no) ;;
33 *) libgd_include="-I$withval" ;;
34 esac
35 ])
36 AC_ARG_WITH([gd-lib],
37 AC_HELP_STRING([--with-gd-lib=DIR],
38 [find libgd library files in DIR]),
39 [dnl
40 case "$with_gd_lib" in
41 ''|no) ;;
42 *) libgd_ldflags="-L$withval" ;;
43 esac
44 ])
46 if test -n "$libgd_include"; then
47 config_vars="$config_vars
48 CFLAGS-memusagestat.c = $libgd_include"
49 fi
50 if test -n "$libgd_ldflags"; then
51 config_vars="$config_vars
52 libgd-LDFLAGS = $libgd_ldflags"
53 fi
55 dnl Arguments to specify presence of other packages/features.
56 AC_ARG_WITH([fp],
57 AC_HELP_STRING([--with-fp],
58 [if using floating-point hardware @<:@default=yes@:>@]),
59 [with_fp=$withval],
60 [with_fp=yes])
61 AC_SUBST(with_fp)
62 AC_ARG_WITH([binutils],
63 AC_HELP_STRING([--with-binutils=PATH],
64 [specify location of binutils (as and ld)]),
65 [path_binutils=$withval],
66 [path_binutils=''])
67 AC_ARG_WITH([elf],
68 AC_HELP_STRING([--with-elf],
69 [if using the ELF object format]),
70 [elf=$withval],
71 [elf=no])
72 AC_ARG_WITH([selinux],
73 AC_HELP_STRING([--with-selinux],
74 [if building with SELinux support]),
75 [with_selinux=$withval],
76 [with_selinux=auto])
77 AC_ARG_WITH([xcoff],
78 AC_HELP_STRING([--with-xcoff],
79 [if using the XCOFF object format]),
80 [xcoff=$withval],
81 [xcoff=no])
82 AC_ARG_WITH([cvs],
83 AC_HELP_STRING([--without-cvs],
84 [if CVS should not be used]),
85 [with_cvs=$withval],
86 [with_cvs=yes])
87 if test "$with_cvs" = yes; then
88 if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
89 then
90 with_cvs=no
91 fi
92 fi
93 AC_SUBST(with_cvs)
95 AC_ARG_WITH([headers],
96 AC_HELP_STRING([--with-headers=PATH],
97 [location of system headers to use
98 (for example /usr/src/linux/include)
99 @<:@default=compiler default@:>@]),
100 [sysheaders=$withval],
101 [sysheaders=''])
103 AC_ARG_ENABLE([sanity-checks],
104 AC_HELP_STRING([--disable-sanity-checks],
105 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
106 [enable_sanity=$enableval],
107 [enable_sanity=yes])
109 AC_SUBST(enable_check_abi)
110 AC_ARG_ENABLE([check-abi],
111 AC_HELP_STRING([--enable-check-abi],
112 [do "make check-abi" in "make check" (no/warn/yes)
113 @<:@default=no@:>@]),
114 [enable_check_abi=$enableval],
115 [enable_check_abi=no])
117 dnl Arguments to enable or disable building the static, shared, profiled,
118 dnl and -fomit-frame-pointer libraries.
119 dnl I've disabled this for now since we cannot build glibc without static
120 dnl libraries built in the moment.
121 dnl AC_ARG_ENABLE([static],
122 dnl AC_HELP_STRING([--enable-static],
123 dnl [build static library @<:@default=yes@:>@]),
124 dnl [static=$enableval],
125 dnl [static=yes])
126 static=yes
127 AC_ARG_ENABLE([shared],
128 AC_HELP_STRING([--enable-shared],
129 [build shared library @<:@default=yes if GNU ld & ELF@:>@]),
130 [shared=$enableval],
131 [shared=default])
132 AC_ARG_ENABLE([profile],
133 AC_HELP_STRING([--enable-profile],
134 [build profiled library @<:@default=no@:>@]),
135 [profile=$enableval],
136 [profile=no])
137 AC_ARG_ENABLE([omitfp],
138 AC_HELP_STRING([--enable-omitfp],
139 [build undebuggable optimized library @<:@default=no@:>@]),
140 [omitfp=$enableval],
141 [omitfp=no])
142 AC_ARG_ENABLE([bounded],
143 AC_HELP_STRING([--enable-bounded],
144 [build with runtime bounds checking @<:@default=no@:>@]),
145 [bounded=$enableval],
146 [bounded=no])
147 AC_ARG_ENABLE([versioning],
148 AC_HELP_STRING([--disable-versioning],
149 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
150 [enable_versioning=$enableval],
151 [enable_versioning=yes])
153 AC_ARG_ENABLE([oldest-abi],
154 AC_HELP_STRING([--enable-oldest-abi=ABI],
155 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
156 [oldest_abi=$enableval],
157 [oldest_abi=no])
158 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
159 oldest_abi=default
160 else
161 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
162 fi
163 AC_SUBST(oldest_abi)
165 AC_ARG_ENABLE([stackguard-randomization],
166 AC_HELP_STRING([--enable-stackguard-randomization],
167 [initialize __stack_chk_guard canary with a random number at program start]),
168 [enable_stackguard_randomize=$enableval],
169 [enable_stackguard_randomize=no])
170 if test "$enable_stackguard_randomize" = yes; then
171 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
172 fi
174 dnl Generic infrastructure for drop-in additions to libc.
175 AC_ARG_ENABLE([add-ons],
176 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
177 [configure and build add-ons in DIR1,DIR2,...
178 search for add-ons if no parameter given]),
179 , [enable_add_ons=yes])
181 dnl Let the user avoid using TLS. Don't know why but...
182 AC_ARG_WITH([tls],
183 AC_HELP_STRING([--with-tls],
184 [enable support for TLS]),
185 [usetls=$withval],
186 [usetls=yes])
188 AC_ARG_WITH([__thread],
189 AC_HELP_STRING([--without-__thread],
190 [do not use TLS features even when supporting them]),
191 [use__thread=$withval],
192 [use__thread=yes])
194 AC_ARG_ENABLE([hidden-plt],
195 AC_HELP_STRING([--disable-hidden-plt],
196 [do not hide internal function calls to avoid PLT]),
197 [hidden=$enableval],
198 [hidden=yes])
199 if test "x$hidden" = xno; then
200 AC_DEFINE(NO_HIDDEN)
201 fi
203 AC_ARG_ENABLE([bind-now],
204 AC_HELP_STRING([--enable-bind-now],
205 [disable lazy relocations in DSOs]),
206 [bindnow=$enableval],
207 [bindnow=no])
208 AC_SUBST(bindnow)
210 dnl On some platforms we cannot use dynamic loading. We must provide
211 dnl static NSS modules.
212 AC_ARG_ENABLE([static-nss],
213 AC_HELP_STRING([--enable-static-nss],
214 [build static NSS modules @<:@default=no@:>@]),
215 [static_nss=$enableval],
216 [static_nss=no])
217 dnl Enable static NSS also if we build no shared objects.
218 if test x"$static_nss" = xyes || test x"$shared" = xno; then
219 static_nss=yes
220 AC_DEFINE(DO_STATIC_NSS)
221 fi
223 AC_ARG_ENABLE([force-install],
224 AC_HELP_STRING([--disable-force-install],
225 [don't force installation of files from this package, even if they are older than the installed files]),
226 [force_install=$enableval],
227 [force_install=yes])
228 AC_SUBST(force_install)
230 dnl On some platforms we allow dropping compatibility with all kernel
231 dnl versions.
232 AC_ARG_ENABLE([kernel],
233 AC_HELP_STRING([--enable-kernel=VERSION],
234 [compile for compatibility with kernel not older than VERSION]),
235 [minimum_kernel=$enableval],
236 [])
237 dnl Prevent unreasonable values.
238 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
239 # Better nothing than this.
240 minimum_kernel=""
241 else
242 if test "$minimum_kernel" = current; then
243 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
244 fi
245 fi
247 dnl For the development we sometimes want gcc to issue even more warnings.
248 dnl This is not the default since many of the extra warnings are not
249 dnl appropriate.
250 AC_ARG_ENABLE([all-warnings],
251 AC_HELP_STRING([--enable-all-warnings],
252 [enable all useful warnings gcc can issue]),
253 [all_warnings=$enableval],
254 [])
255 AC_SUBST(all_warnings)
257 AC_CANONICAL_HOST
259 # The way shlib-versions is used to generate soversions.mk uses a
260 # fairly simplistic model for name recognition that can't distinguish
261 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
262 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
263 # tell. This doesn't get used much beyond that, so it's fairly safe.
264 case "$host_os" in
265 linux*)
266 ;;
267 gnu*)
268 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
269 ;;
270 esac
272 # We keep the original values in `$config_*' and never modify them, so we
273 # can write them unchanged into config.make. Everything else uses
274 # $machine, $vendor, and $os, and changes them whenever convenient.
275 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
277 # Don't allow vendor == "unknown"
278 test "$config_vendor" = unknown && config_vendor=
279 config_os="`echo $config_os | sed 's/^unknown-//'`"
281 # Some configurations imply other options.
282 case "$host_os" in
283 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
284 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
285 ;;
286 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
287 # These systems (almost) always use the ELF format.
288 elf=yes
289 ;;
290 aix*)
291 # These systems are always xcoff
292 xcoff=yes
293 elf=no
294 ;;
295 esac
297 # The configure fragment of an add-on port can modify these to supplement
298 # or override the table in the case statement below. No fragment should
299 # ever change the config_* variables, however.
300 machine=$config_machine
301 vendor=$config_vendor
302 os=$config_os
303 base_os=''
305 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
306 # Unify this here.
307 if test "$machine" = rs6000; then
308 machine="powerpc"
309 fi
311 # Braindead PowerPC box with absolutely no FPU.
312 case "$machine-$host_os" in
313 powerpc*-*soft)
314 with_fp=no
315 ;;
316 esac
318 submachine=
319 AC_ARG_WITH([cpu],
320 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
321 [dnl
322 case "$withval" in
323 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
324 no) ;;
325 *) submachine="$withval" ;;
326 esac
327 ])
330 # An add-on can set this when it wants to disable the sanity check below.
331 libc_config_ok=no
333 dnl Having this here, though empty, makes sure that if add-ons' fragments
334 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
335 dnl our AC_OUTPUT will actually use it.
336 AC_CONFIG_SUBDIRS()
338 case "$enable_add_ons" in
339 ''|no) add_ons= ;;
340 yes|'*')
341 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
342 sed 's@/[[^/]]*$@@' | sort | uniq`
343 add_ons_automatic=yes
344 ;;
345 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
346 add_ons_automatic=no ;;
347 esac
349 configured_add_ons=
350 add_ons_sfx=
351 add_ons_pfx=
352 if test x"$add_ons" != x; then
353 for f in $add_ons; do
354 # Some sanity checks
355 case "$f" in
356 crypt)
357 AC_MSG_ERROR([
358 *** It seems that you're using an old \`crypt' add-on. crypt is now
359 *** part of glibc and using the old add-on will not work with this
360 *** release. Start again with fresh sources and without the old
361 *** \`crypt' add-on.])
362 ;;
363 localedata)
364 AC_MSG_ERROR([
365 *** It seems that you're using an old \`localedata' add-on. localedata
366 *** is now part of glibc and using the old add-on will not work with
367 *** this release. Start again with fresh sources and without the old
368 *** \`localedata' add-on.])
369 ;;
370 esac
371 done
373 # Now source each add-on's configure fragment.
374 # The fragments can use $srcdir/$libc_add_on to find themselves,
375 # and test $add_ons_automatic to see if they were explicitly requested.
376 # A fragment can clear (or even change) $libc_add_on to affect
377 # whether it goes into the list to be actually used in the build.
378 use_add_ons=
379 for libc_add_on in $add_ons; do
380 # Test whether such a directory really exists.
381 # It can be absolute, or relative to $srcdir, or relative to the build dir.
382 case "$libc_add_on" in
383 /*)
384 libc_add_on_srcdir=$libc_add_on
385 ;;
386 *)
387 test -d "$srcdir/$libc_add_on" || {
388 if test -d "$libc_add_on"; then
389 libc_add_on="`pwd`/$libc_add_on"
390 else
391 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
392 fi
393 }
394 libc_add_on_srcdir=$srcdir/$libc_add_on
395 ;;
396 esac
398 libc_add_on_frag=$libc_add_on_srcdir/configure
399 libc_add_on_canonical=
400 if test -r "$libc_add_on_frag"; then
401 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
402 libc_add_on_canonical=unknown
403 libc_add_on_subdirs=
404 . "$libc_add_on_frag"
405 test -z "$libc_add_on" || {
406 configured_add_ons="$configured_add_ons $libc_add_on"
407 if test "x$libc_add_on_canonical" = xunknown; then
408 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
409 fi
410 for d in $libc_add_on_subdirs; do
411 case "$libc_add_on" in
412 /*) subdir_srcdir="$libc_add_on" ;;
413 *) subdir_srcdir="\$(..)$libc_add_on" ;;
414 esac
415 case "$d" in
416 .)
417 d="${libc_add_on_canonical:-$libc_add_on}"
418 ;;
419 /*)
420 subdir_srcdir="$d"
421 ;;
422 *)
423 subdir_srcdir="$subdir_srcdir/$d"
424 ;;
425 esac
426 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
427 add_on_subdirs="$add_on_subdirs $d"
428 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
429 $d-srcdir = $subdir_srcdir"
430 done
431 }
432 fi
433 if test -n "$libc_add_on"; then
434 if frags=`ls -d $libc_add_on_srcdir/sysdeps/*/preconfigure 2> /dev/null`
435 then
436 AC_MSG_CHECKING(add-on $libc_add_on for preconfigure fragments)
437 for frag in $frags; do
438 name=`echo "$frag" | sed 's@/[[^/]]*$@@;s@^.*/@@'`
439 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
440 . "$frag"
441 done
442 AC_MSG_RESULT()
443 fi
444 use_add_ons="$use_add_ons $libc_add_on"
445 add_ons_pfx="$add_ons_pfx $libc_add_on/"
446 test -z "$libc_add_on_canonical" ||
447 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
448 fi
449 done
450 # Use echo to strip excess whitespace.
451 add_ons="`echo $use_add_ons`"
452 fi
453 AC_SUBST(add_ons)
454 AC_SUBST(add_on_subdirs)
457 ###
458 ### I put this here to prevent those annoying emails from people who cannot
459 ### read and try to compile glibc on unsupported platforms. --drepper
460 ###
461 ### By using the undocumented --enable-hacker-mode option for configure
462 ### one can skip this test to make the configuration not fail for unsupported
463 ### platforms.
464 ###
465 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
466 case "$machine-$host_os" in
467 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
468 ;;
469 *)
470 echo "*** The GNU C library is currently not available for this platform."
471 echo "*** So far nobody cared to port it and if there is no volunteer it"
472 echo "*** might never happen. So, if you have interest to see glibc on"
473 echo "*** this platform visit"
474 echo "*** http://www.gnu.org/software/libc/porting.html"
475 echo "*** and join the group of porters"
476 exit 1
477 ;;
478 esac
479 fi
481 dnl We need to use [ and ] for other purposes for a while now.
482 changequote(,)dnl
483 # Expand the configuration machine name into a subdirectory by architecture
484 # type and particular chip. If an add-on configure fragment already set
485 # base_machine, we don't change it.
486 test -n "$base_machine" || case "$machine" in
487 a29k | am29000) base_machine=a29k machine=a29k ;;
488 alpha*) base_machine=alpha machine=alpha/$machine ;;
489 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
490 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
491 i[34567]86) base_machine=i386 machine=i386/$machine ;;
492 ia64) base_machine=ia64 machine=ia64 ;;
493 m88???) base_machine=m88k machine=m88k/$machine ;;
494 m88k) base_machine=m88k machine=m88k/m88100 ;;
495 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
496 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
497 s390) base_machine=s390 machine=s390/s390-32 ;;
498 s390x) base_machine=s390 machine=s390/s390-64 ;;
499 sh3*) base_machine=sh machine=sh/sh3 ;;
500 sh4*) base_machine=sh machine=sh/sh4 ;;
501 sparc | sparcv[67])
502 base_machine=sparc machine=sparc/sparc32 ;;
503 sparcv8 | supersparc | hypersparc)
504 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
505 sparcv8plus | sparcv8plusa | sparcv9)
506 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
507 sparcv8plusb | sparcv9b)
508 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
509 sparcv9v)
510 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
511 sparcv9v2)
512 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
513 sparc64)
514 base_machine=sparc machine=sparc/sparc64 ;;
515 sparc64b)
516 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
517 sparc64v)
518 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
519 sparc64v2)
520 base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
521 *) base_machine=$machine ;;
522 esac
523 changequote([,])dnl
524 AC_SUBST(base_machine)
526 if test "$base_machine" = "i386"; then
527 AC_DEFINE(USE_REGPARMS)
528 fi
530 # Compute the list of sysdep directories for this configuration.
531 # This can take a while to compute.
532 sysdep_dir=$srcdir/sysdeps
533 AC_MSG_CHECKING(sysdep dirs)
534 dnl We need to use [ and ] for other purposes for a while now.
535 changequote(,)dnl
536 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
537 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
539 test "x$base_os" != x || case "$os" in
540 gnu*)
541 base_os=mach/hurd ;;
542 netbsd* | 386bsd* | freebsd* | bsdi*)
543 base_os=unix/bsd/bsd4.4 ;;
544 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
545 base_os=unix/bsd ;;
546 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
547 base_os=unix/sysv ;;
548 irix6*)
549 base_os=unix/sysv/irix6/$os ;;
550 solaris[2-9]*)
551 base_os=unix/sysv/sysv4 ;;
552 hpux*)
553 base_os=unix/sysv/hpux/$os ;;
554 aix4.3*)
555 base_os=unix/sysv/aix/aix4.3 ;;
556 none)
557 base_os=standalone ;;
558 esac
560 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
561 tail=$os
562 ostry=$os
563 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
564 ostry="$ostry /$o"
565 tail=$o
566 done
567 o=`echo $tail | sed 's/[0-9]*$//'`
568 if test $o != $tail; then
569 ostry="$ostry /$o"
570 fi
571 # For linux-gnu, try linux-gnu, then linux.
572 o=`echo $tail | sed 's/-.*$//'`
573 if test $o != $tail; then
574 ostry="$ostry /$o"
575 fi
577 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
578 base=
579 tail=$base_os
580 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
581 set $b
582 base="$base /$1"
583 tail="$2"
584 done
586 # For sparc/sparc32, try sparc/sparc32 and then sparc.
587 mach=
588 tail=$machine${submachine:+/$submachine}
589 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
590 set $m
591 # Prepend the machine's FPU directory unless --without-fp.
592 if test "$with_fp" = yes; then
593 mach="$mach /$1/fpu"
594 else
595 mach="$mach /$1/nofpu"
596 fi
597 mach="$mach /$1"
598 tail="$2"
599 done
601 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
602 changequote([,])dnl
604 # Find what sysdep directories exist.
605 sysnames_add_ons=
606 sysnames=
607 for b in $base ''; do
608 for m0 in $mach ''; do
609 for v in /$vendor ''; do
610 test "$v" = / && continue
611 for o in /$ostry ''; do
612 test "$o" = / && continue
613 for m in $mach ''; do
614 for d in $add_ons_pfx ''; do
615 for a in $add_ons_sfx ''; do
616 if test -n "$m0$m0sub$b$v$o$m$msub"; then
617 try_srcdir="${srcdir}/"
618 case "$d" in
619 /*) try_srcdir= ;;
620 esac
621 try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
622 test -n "$enable_debug_configure" &&
623 echo "$0 [DEBUG]: try $try" >&2
624 if test -d "$try_srcdir$try"; then
625 sysnames="$sysnames $try"
626 { test -n "$o" || test -n "$b"; } && os_used=t
627 { test -n "$m" || test -n "$m0"; } && machine_used=t
628 case x${m0:-$m} in
629 x*/$submachine) submachine_used=t ;;
630 esac
631 if test -n "$d"; then
632 case "$sysnames_add_ons" in
633 *" $d "*) ;;
634 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
635 esac
636 fi
637 fi
638 fi
639 done
640 done
641 done
642 done
643 done
644 done
645 done
647 if test -z "$os_used" && test "$os" != none; then
648 AC_MSG_ERROR(Operating system $os is not supported.)
649 fi
650 if test -z "$machine_used" && test "$machine" != none; then
651 AC_MSG_ERROR(The $machine is not supported.)
652 fi
653 if test -z "$submachine_used" && test -n "$submachine"; then
654 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
655 fi
656 AC_SUBST(submachine)
658 # We have now validated the configuration.
661 # If using ELF, look for an `elf' subdirectory of each machine directory.
662 # We prepend these rather than inserting them whereever the machine appears
663 # because things specified by the machine's ELF ABI should override
664 # OS-specific things, and should always be the same for any OS on the
665 # machine (otherwise what's the point of an ABI?).
666 if test "$elf" = yes; then
667 elf_dirs=
668 for d in $add_ons_pfx ''; do
669 for m in $mach; do
670 if test -d $srcdir/${d}sysdeps$m/elf; then
671 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
672 fi
673 done
674 done
675 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
676 fi
679 # Expand the list of system names into a full list of directories
680 # from each element's parent name and Implies file (if present).
681 set $sysnames
682 names=
683 while test $# -gt 0; do
684 name=$1
685 shift
687 case " $names " in *" $name "*)
688 # Already in the list.
689 continue
690 esac
692 # Report each name as we discover it, so there is no long pause in output.
693 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
695 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
697 case $name in
698 /*) xsrcdir= ;;
699 *) xsrcdir=$srcdir/ ;;
700 esac
701 test -n "$enable_debug_configure" &&
702 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
704 if test -f $xsrcdir$name/Implies; then
705 # Collect more names from the `Implies' file (removing comments).
706 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
707 implied=
708 for x in $implied_candidate; do
709 found=no
710 if test -d $xsrcdir$name_base/$x; then
711 implied="$implied $name_base/$x";
712 found=yes
713 fi
714 for d in $add_ons_pfx ''; do
715 try="${d}sysdeps/$x"
716 case $d in
717 /*) try_srcdir= ;;
718 *) try_srcdir=$srcdir/ ;;
719 esac
720 test -n "$enable_debug_configure" &&
721 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
722 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
723 then
724 implied="$implied $try"
725 found=yes
726 case "$sysnames_add_ons" in
727 *" $d "*) ;;
728 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
729 esac
730 fi
731 done
732 if test $found = no; then
733 AC_MSG_WARN($name/Implies specifies nonexistent $x)
734 fi
735 done
736 else
737 implied=
738 fi
740 # Add NAME to the list of names.
741 names="$names $name"
743 # Find the parent of NAME, using the empty string if it has none.
744 changequote(,)dnl
745 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
746 changequote([,])dnl
748 # Add the names implied by NAME, and NAME's parent (if it has one), to
749 # the list of names to be processed (the argument list). We prepend the
750 # implied names to the list and append the parent. We want implied
751 # directories to come before further directories inferred from the
752 # configuration components; this ensures that for sysv4, unix/common
753 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
754 # after sysv4).
755 sysnames="`echo $implied $* $parent`"
756 test -n "$sysnames" && set $sysnames
757 done
759 # Add the default directories.
760 default_sysnames=sysdeps/generic
761 if test "$elf" = yes; then
762 default_sysnames="sysdeps/generic/elf $default_sysnames"
763 fi
764 sysnames="$names $default_sysnames"
765 AC_SUBST(sysnames)
766 # The other names were emitted during the scan.
767 AC_MSG_RESULT($default_sysnames)
769 # Collect the list of add-ons that supply partial sysdeps trees.
770 sysdeps_add_ons=
771 for add_on in $add_ons; do
772 case "$add_on" in
773 /*) xsrcdir= ;;
774 *) xsrcdir="$srcdir/" ;;
775 esac
777 test -d "$xsrcdir$add_on/sysdeps" || {
778 case "$configured_add_ons " in
779 *" $add_on "*) ;;
780 *|'')
781 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
782 ;;
783 esac
784 continue
785 }
787 sysdeps_add_ons="$sysdeps_add_ons $add_on"
788 case "$sysnames_add_ons" in
789 *" $add_on/ "*) ;;
790 *|'')
791 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
792 continue ;;
793 esac
795 found=no
796 for d in $sysnames; do
797 case "$d" in
798 $add_on/sysdeps/*) ;;
799 *) continue ;;
800 esac
801 (cd "$xsrcdir$d" && for f in *[[!~]]; do
802 case "$f" in
803 sys|bits)
804 for ff in $f/*.h; do
805 test -d "$ff" || { test -e "$ff" && exit 88; }
806 done
807 ;;
808 *)
809 test -d "$f" || { test -e "$f" && exit 88; }
810 ;;
811 esac
812 done)
813 if test $? -eq 88; then
814 found=yes
815 break
816 fi
817 done
818 if test $found = no; then
819 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
820 fi
821 done
822 AC_SUBST(sysdeps_add_ons)
825 ### Locate tools.
827 AC_PROG_INSTALL
828 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
829 # The makefiles need to use a different form to find it in $srcdir.
830 INSTALL='\$(..)./scripts/install-sh -c'
831 fi
832 AC_PROG_LN_S
834 AC_PROG_CC
835 if test $host != $build; then
836 AC_CHECK_PROGS(BUILD_CC, gcc cc)
837 fi
838 AC_SUBST(cross_compiling)
839 AC_PROG_CPP
840 # We need the C++ compiler only for testing.
841 AC_PROG_CXX
842 LIBC_PROG_BINUTILS
843 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
845 # Accept binutils 2.13 or newer.
846 AC_CHECK_PROG_VER(AS, $AS, --version,
847 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
848 [2.1[3-9]*], AS=: critic_missing="$critic_missing as")
849 AC_CHECK_PROG_VER(LD, $LD, --version,
850 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
851 [2.1[3-9]*], LD=: critic_missing="$critic_missing ld")
853 # We need the physical current working directory. We cannot use the
854 # "pwd -P" shell builtin since that's not portable. Instead we try to
855 # find a pwd binary. Note that assigning to the PWD environment
856 # variable might have some interesting side effects, so we don't do
857 # that.
858 AC_PATH_PROG(PWD_P, pwd, no)
859 if test "$PWD_P" = no; then
860 AC_MSG_ERROR(*** A pwd binary could not be found.)
861 fi
863 # These programs are version sensitive.
864 AC_CHECK_TOOL_PREFIX
865 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
866 [version \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ],
867 critic_missing="$critic_missing gcc")
868 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
869 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
870 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
872 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
873 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
874 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
875 MSGFMT=: aux_missing="$aux_missing msgfmt")
876 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
877 [GNU texinfo.* \([0-9][0-9.]*\)],
878 [4.*],
879 MAKEINFO=: aux_missing="$aux_missing makeinfo")
880 AC_CHECK_PROG_VER(SED, sed, --version,
881 [GNU sed version \([0-9]*\.[0-9.]*\)],
882 [3.0[2-9]*|3.[1-9]*|[4-9]*],
883 SED=: aux_missing="$aux_missing sed")
885 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
886 case "x$AUTOCONF" in
887 xno|x|x:) AUTOCONF=no ;;
888 *)
889 AC_CACHE_CHECK(dnl
890 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
891 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
892 libc_cv_autoconf_works=yes
893 else
894 libc_cv_autoconf_works=no
895 fi])
896 test $libc_cv_autoconf_works = yes || AUTOCONF=no
897 ;;
898 esac
899 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
900 # If --without-cvs they probably won't change configure.in, so no complaints.
901 aux_missing="$aux_missing autoconf"
902 fi
904 test -n "$critic_missing" && AC_MSG_ERROR([
905 *** These critical programs are missing or too old:$critic_missing
906 *** Check the INSTALL file for required versions.])
908 test -n "$aux_missing" && AC_MSG_WARN([
909 *** These auxiliary programs are missing or incompatible versions:$aux_missing
910 *** some features will be disabled.
911 *** Check the INSTALL file for required versions.])
913 # if using special system headers, find out the compiler's sekrit
914 # header directory and add that to the list. NOTE: Only does the right
915 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
916 if test -n "$sysheaders"; then
917 SYSINCLUDES=-nostdinc
918 for d in include include-fixed; do
919 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
920 SYSINCLUDES="$SYSINCLUDES -isystem $i"
921 done
922 SYSINCLUDES="$SYSINCLUDES \
923 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
924 if test -n "$CXX"; then
925 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
926 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
927 cxxheaders=`$CXX -print-file-name=../../../../include/c++/`"$cxxversion" &&
928 CXX_SYSINCLUDES="-isystem $cxxheaders \
929 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
930 fi
931 fi
932 AC_SUBST(SYSINCLUDES)
933 AC_SUBST(CXX_SYSINCLUDES)
935 # check if ranlib is necessary
936 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
937 cat > conftest.c <<EOF
938 int a;
939 char b;
940 void c(void) {}
941 EOF
942 $CC $CFLAGS $CPPFLAGS -c conftest.c
943 $AR cr conftest.a conftest.o
944 cp conftest.a conftest2.a
945 $RANLIB conftest.a
946 if cmp -s conftest.a conftest2.a; then
947 libc_cv_ranlib_necessary=no
948 else
949 libc_cv_ranlib_necessary=yes
950 fi
951 rm -rf conftest*])
952 if test "$libc_cv_ranlib_necessary" = no; then
953 RANLIB=:
954 fi
956 # Test if LD_LIBRARY_PATH contains the notation for the current directory
957 # since this would lead to problems installing/building glibc.
958 # LD_LIBRARY_PATH contains the current directory if one of the following
959 # is true:
960 # - one of the terminals (":" and ";") is the first or last sign
961 # - two terminals occur directly after each other
962 # - the path contains an element with a dot in it
963 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
964 changequote(,)dnl
965 case ${LD_LIBRARY_PATH} in
966 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
967 ld_library_path_setting="contains current directory"
968 ;;
969 *)
970 ld_library_path_setting="ok"
971 ;;
972 esac
973 changequote([,])dnl
974 AC_MSG_RESULT($ld_library_path_setting)
975 if test "$ld_library_path_setting" != "ok"; then
976 AC_MSG_ERROR([
977 *** LD_LIBRARY_PATH shouldn't contain the current directory when
978 *** building glibc. Please change the environment variable
979 *** and run configure again.])
980 fi
982 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
983 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
984 libc_cv_gcc_static_libgcc=
985 else
986 libc_cv_gcc_static_libgcc=-static-libgcc
987 fi])
988 AC_SUBST(libc_cv_gcc_static_libgcc)
990 AC_PATH_PROG(BASH_SHELL, bash, no)
991 if test "$BASH_SHELL" != no &&
992 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
993 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
994 libc_cv_have_bash2=yes
995 else
996 libc_cv_have_bash2=no
997 fi
998 AC_SUBST(libc_cv_have_bash2)
1000 dnl We need a ksh compatible shell for tzselect.
1001 if test "$BASH_SHELL" = no; then
1002 AC_PATH_PROG(KSH, ksh, no)
1003 if test "$KSH" = no; then
1004 libc_cv_have_ksh=no
1005 else
1006 libc_cv_have_ksh=yes
1007 fi
1008 else
1009 KSH="$BASH_SHELL"
1010 AC_SUBST(KSH)
1011 libc_cv_have_ksh=yes
1012 fi
1013 AC_SUBST(libc_cv_have_ksh)
1015 AC_PROG_AWK
1016 AC_PATH_PROG(PERL, perl, no)
1017 if test "$PERL" != no &&
1018 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1019 PERL=no
1020 fi
1021 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1022 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1023 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1025 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
1026 echo '#include <stddef.h>
1027 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
1028 if eval "$ac_cpp conftest.c 2>/dev/null" \
1029 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
1030 libc_cv_signed_size_t=no
1031 else
1032 libc_cv_signed_size_t=yes
1033 fi
1034 rm -f conftest*])
1035 if test $libc_cv_signed_size_t = yes; then
1036 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
1037 cat >> confdefs.h <<\EOF
1038 #undef __SIZE_TYPE__
1039 #define __SIZE_TYPE__ unsigned
1040 EOF
1041 fi
1043 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1044 AC_TRY_COMPILE(dnl
1045 [#define __need_size_t
1046 #define __need_wchar_t
1047 #include <stddef.h>
1048 #define __need_NULL
1049 #include <stddef.h>], [size_t size; wchar_t wchar;
1050 #ifdef offsetof
1051 #error stddef.h ignored __need_*
1052 #endif
1053 if (&size == NULL || &wchar == NULL) abort ();],
1054 libc_cv_friendly_stddef=yes,
1055 libc_cv_friendly_stddef=no)])
1056 if test $libc_cv_friendly_stddef = yes; then
1057 config_vars="$config_vars
1058 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1059 fi
1061 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1062 libc_cv_need_minus_P, [dnl
1063 cat > conftest.S <<EOF
1064 #include "confdefs.h"
1065 /* Nothing whatsoever. */
1066 EOF
1067 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1068 libc_cv_need_minus_P=no
1069 else
1070 libc_cv_need_minus_P=yes
1071 fi
1072 rm -f conftest*])
1073 if test $libc_cv_need_minus_P = yes; then
1074 config_vars="$config_vars
1075 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1076 fi
1078 AC_MSG_CHECKING(whether .text pseudo-op must be used)
1079 AC_CACHE_VAL(libc_cv_dot_text, [dnl
1080 cat > conftest.s <<EOF
1081 .text
1082 EOF
1083 libc_cv_dot_text=
1084 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1085 libc_cv_dot_text=.text
1086 fi
1087 rm -f conftest*])
1088 if test -z "$libc_cv_dot_text"; then
1089 AC_MSG_RESULT(no)
1090 else
1091 AC_MSG_RESULT(yes)
1092 fi
1094 AC_CACHE_CHECK(for assembler global-symbol directive,
1095 libc_cv_asm_global_directive, [dnl
1096 libc_cv_asm_global_directive=UNKNOWN
1097 for ac_globl in .globl .global .EXPORT; do
1098 cat > conftest.s <<EOF
1099 ${libc_cv_dot_text}
1100 ${ac_globl} foo
1101 foo:
1102 EOF
1103 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1104 libc_cv_asm_global_directive=${ac_globl}
1105 fi
1106 rm -f conftest*
1107 test $libc_cv_asm_global_directive != UNKNOWN && break
1108 done])
1109 if test $libc_cv_asm_global_directive = UNKNOWN; then
1110 AC_MSG_ERROR(cannot determine asm global directive)
1111 else
1112 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
1113 fi
1115 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1116 cat > conftest.s <<EOF
1117 ${libc_cv_dot_text}
1118 foo:
1119 .set glibc_conftest_frobozz,foo
1120 $libc_cv_asm_global_directive glibc_conftest_frobozz
1121 EOF
1122 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1123 # (but it doesn't work), so we must do a linking check to be sure.
1124 cat > conftest1.c <<\EOF
1125 extern int glibc_conftest_frobozz;
1126 void _start() { glibc_conftest_frobozz = 1; }
1127 EOF
1128 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1129 -nostartfiles -nostdlib \
1130 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1131 libc_cv_asm_set_directive=yes
1132 else
1133 libc_cv_asm_set_directive=no
1134 fi
1135 rm -f conftest*])
1136 if test $libc_cv_asm_set_directive = yes; then
1137 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1138 fi
1140 AC_CACHE_CHECK(for assembler .type directive prefix,
1141 libc_cv_asm_type_prefix, [dnl
1142 libc_cv_asm_type_prefix=no
1143 for ac_try_prefix in '@' '%' '#'; do
1144 cat > conftest.s <<EOF
1145 ${libc_cv_dot_text}
1146 ${libc_cv_asm_global_directive} foo
1147 .type foo, ${ac_try_prefix}object
1148 .size foo, 1
1149 foo:
1150 .byte 1
1151 EOF
1152 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1153 libc_cv_asm_type_prefix=${ac_try_prefix}
1154 fi
1155 rm -f conftest*
1156 test "x$libc_cv_asm_type_prefix" != xno && break
1157 done])
1158 if test "x$libc_cv_asm_type_prefix" != xno; then
1159 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
1160 fi
1162 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1163 [cat > conftest.s <<EOF
1164 ${libc_cv_dot_text}
1165 _sym:
1166 .symver _sym,sym@VERS
1167 EOF
1168 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1169 libc_cv_asm_symver_directive=yes
1170 else
1171 libc_cv_asm_symver_directive=no
1172 fi
1173 rm -f conftest*])
1174 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1175 if test $libc_cv_asm_symver_directive = yes; then
1176 cat > conftest.s <<EOF
1177 ${libc_cv_dot_text}
1178 _sym:
1179 .symver _sym,sym@VERS
1180 EOF
1181 cat > conftest.map <<EOF
1182 VERS_1 {
1183 global: sym;
1184 };
1186 VERS_2 {
1187 global: sym;
1188 } VERS_1;
1189 EOF
1190 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1191 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1192 -o conftest.so conftest.o
1193 -nostartfiles -nostdlib
1194 -Wl,--version-script,conftest.map
1195 1>&AS_MESSAGE_LOG_FD]);
1196 then
1197 libc_cv_ld_version_script_option=yes
1198 else
1199 libc_cv_ld_version_script_option=no
1200 fi
1201 else
1202 libc_cv_ld_version_script_option=no
1203 fi
1204 else
1205 libc_cv_ld_version_script_option=no
1206 fi
1207 rm -f conftest*])
1208 if test $shared != no &&
1209 test $libc_cv_asm_symver_directive = yes &&
1210 test $libc_cv_ld_version_script_option = yes &&
1211 test $enable_versioning = yes; then
1212 VERSIONING=yes
1213 AC_DEFINE(DO_VERSIONING)
1214 else
1215 VERSIONING=no
1216 fi
1217 AC_SUBST(VERSIONING)
1219 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1220 echo "\
1221 *** WARNING: You should not compile GNU libc without versioning. Not using
1222 *** versioning will introduce incompatibilities so that old binaries
1223 *** will not run anymore.
1224 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1225 fi
1226 if test $elf = yes; then
1227 AC_CACHE_CHECK(for .previous assembler directive,
1228 libc_cv_asm_previous_directive, [dnl
1229 cat > conftest.s <<EOF
1230 .section foo_section
1231 .previous
1232 EOF
1233 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1234 libc_cv_asm_previous_directive=yes
1235 else
1236 libc_cv_asm_previous_directive=no
1237 fi
1238 rm -f conftest*])
1239 if test $libc_cv_asm_previous_directive = yes; then
1240 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1241 else
1242 AC_CACHE_CHECK(for .popsection assembler directive,
1243 libc_cv_asm_popsection_directive, [dnl
1244 cat > conftest.s <<EOF
1245 .pushsection foo_section
1246 .popsection
1247 EOF
1248 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1249 libc_cv_asm_popsection_directive=yes
1250 else
1251 libc_cv_asm_popsection_directive=no
1252 fi
1253 rm -f conftest*])
1254 if test $libc_cv_asm_popsection_directive = yes; then
1255 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1256 fi
1257 fi
1258 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1259 libc_cv_asm_protected_directive, [dnl
1260 cat > conftest.s <<EOF
1261 .protected foo
1262 foo:
1263 .hidden bar
1264 bar:
1265 EOF
1266 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1267 libc_cv_asm_protected_directive=yes
1268 else
1269 AC_MSG_ERROR(assembler support for symbol visibility is required)
1270 fi
1271 rm -f conftest*])
1273 if test $libc_cv_asm_protected_directive = yes; then
1274 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1275 libc_cv_visibility_attribute,
1276 [cat > conftest.c <<EOF
1277 int foo __attribute__ ((visibility ("hidden"))) = 1;
1278 int bar __attribute__ ((visibility ("protected"))) = 1;
1279 EOF
1280 libc_cv_visibility_attribute=no
1281 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1282 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1283 if grep '\.protected.*bar' conftest.s >/dev/null; then
1284 libc_cv_visibility_attribute=yes
1285 fi
1286 fi
1287 fi
1288 rm -f conftest.[cs]
1289 ])
1290 if test $libc_cv_visibility_attribute != yes; then
1291 AC_MSG_ERROR(compiler support for visibility attribute is required)
1292 fi
1293 fi
1295 if test $libc_cv_visibility_attribute = yes; then
1296 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1297 libc_cv_broken_visibility_attribute,
1298 [cat > conftest.c <<EOF
1299 int foo (int x);
1300 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1301 int bar (int x) { return x; }
1302 EOF
1303 libc_cv_broken_visibility_attribute=yes
1304 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
1305 changequote(,)dnl
1306 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1307 changequote([,])dnl
1308 libc_cv_broken_visibility_attribute=no
1309 fi
1310 fi
1311 rm -f conftest.c conftest.s
1312 ])
1313 if test $libc_cv_broken_visibility_attribute = yes; then
1314 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1315 fi
1316 fi
1318 AC_CACHE_CHECK(for broken __attribute__((alias())),
1319 libc_cv_broken_alias_attribute,
1320 [cat > conftest.c <<EOF
1321 extern int foo (int x) __asm ("xyzzy");
1322 int bar (int x) { return x; }
1323 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1324 extern int dfoo;
1325 extern __typeof (dfoo) dfoo __asm ("abccb");
1326 int dfoo = 1;
1327 EOF
1328 libc_cv_broken_alias_attribute=yes
1329 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1330 if grep 'xyzzy' conftest.s >/dev/null &&
1331 grep 'abccb' conftest.s >/dev/null; then
1332 libc_cv_broken_alias_attribute=no
1333 fi
1334 fi
1335 rm -f conftest.c conftest.s
1336 ])
1337 if test $libc_cv_broken_alias_attribute = yes; then
1338 AC_MSG_ERROR(working alias attribute support required)
1339 fi
1341 if test $libc_cv_visibility_attribute = yes; then
1342 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1343 libc_cv_have_sdata_section,
1344 [echo "int i;" > conftest.c
1345 libc_cv_have_sdata_section=no
1346 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1347 | grep '\.sdata' >/dev/null; then
1348 libc_cv_have_sdata_section=yes
1349 fi
1350 rm -f conftest.c conftest.so
1351 ])
1352 if test $libc_cv_have_sdata_section = yes; then
1353 AC_DEFINE(HAVE_SDATA_SECTION)
1354 fi
1355 fi
1357 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1358 libc_cv_initfini_array, [dnl
1359 cat > conftest.c <<EOF
1360 int _start (void) { return 0; }
1361 int __start (void) { return 0; }
1362 int foo (void) { return 1; }
1363 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1364 EOF
1365 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1366 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1367 then
1368 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1369 libc_cv_initfini_array=yes
1370 else
1371 libc_cv_initfini_array=no
1372 fi
1373 else
1374 libc_cv_initfini_array=no
1375 fi
1376 rm -f conftest*])
1377 if test $libc_cv_initfini_array != yes; then
1378 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1379 fi
1381 AC_CACHE_CHECK(for libunwind-support in compiler,
1382 libc_cv_cc_with_libunwind, [
1383 cat > conftest.c <<EOF
1384 int main (void) { return 0; }
1385 EOF
1386 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1387 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1388 libc_cv_cc_with_libunwind=yes
1389 else
1390 libc_cv_cc_with_libunwind=no
1391 fi
1392 rm -f conftest*])
1393 AC_SUBST(libc_cv_cc_with_libunwind)
1394 if test $libc_cv_cc_with_libunwind = yes; then
1395 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1396 fi
1398 AC_CACHE_CHECK(for -z nodelete option,
1399 libc_cv_z_nodelete, [dnl
1400 cat > conftest.c <<EOF
1401 int _start (void) { return 42; }
1402 EOF
1403 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1404 -fPIC -shared -o conftest.so conftest.c
1405 -nostartfiles -nostdlib
1406 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1407 then
1408 libc_cv_z_nodelete=yes
1409 else
1410 AC_MSG_ERROR(linker with -z nodelete support required)
1411 fi
1412 rm -f conftest*])
1414 AC_CACHE_CHECK(for -z nodlopen option,
1415 libc_cv_z_nodlopen, [dnl
1416 cat > conftest.c <<EOF
1417 int _start (void) { return 42; }
1418 EOF
1419 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1420 -fPIC -shared -o conftest.so conftest.c
1421 -nostartfiles -nostdlib
1422 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1423 then
1424 libc_cv_z_nodlopen=yes
1425 else
1426 AC_MSG_ERROR(linker with -z nodlopen support required)
1427 fi
1428 rm -f conftest*])
1430 AC_CACHE_CHECK(for -z initfirst option,
1431 libc_cv_z_initfirst, [dnl
1432 cat > conftest.c <<EOF
1433 int _start (void) { return 42; }
1434 EOF
1435 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1436 -fPIC -shared -o conftest.so conftest.c
1437 -nostartfiles -nostdlib
1438 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1439 then
1440 libc_cv_z_initfirst=yes
1441 else
1442 AC_MSG_ERROR(linker with -z initfirst support required)
1443 fi
1444 rm -f conftest*])
1446 case "$base_machine" in
1447 changequote(,)dnl
1448 i[34567]86 | x86_64 | powerpc* | s390* | sparc* | alpha*)
1449 changequote([,])dnl
1450 AC_CACHE_CHECK(for -z relro option,
1451 libc_cv_z_relro, [dnl
1452 libc_cv_z_relro=no
1453 if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
1454 then
1455 if AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep DATA_SEGMENT_RELRO_END 1>&AS_MESSAGE_LOG_FD])
1456 then
1457 libc_cv_z_relro=yes
1458 fi
1459 fi])
1460 if test "$libc_cv_z_relro" = no; then
1461 AC_MSG_ERROR(linker with -z relro support required)
1462 fi
1463 ;;
1464 *) ;;
1465 esac
1467 AC_CACHE_CHECK(for -Bgroup option,
1468 libc_cv_Bgroup, [dnl
1469 cat > conftest.c <<EOF
1470 int _start (void) { return 42; }
1471 EOF
1472 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1473 -fPIC -shared -o conftest.so conftest.c
1474 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1475 then
1476 libc_cv_Bgroup=yes
1477 else
1478 libc_cv_Bgroup=no
1479 fi
1480 rm -f conftest*])
1481 AC_SUBST(libc_cv_Bgroup)
1483 AC_CACHE_CHECK(for libgcc_s suffix,
1484 libc_cv_libgcc_s_suffix, [dnl
1485 cat > conftest.c <<EOF
1486 int main (void) { return 0; }
1487 EOF
1488 changequote(,)dnl
1489 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1490 -fPIC -shared -shared-libgcc -o conftest.so \
1491 conftest.c -v 2>&1 >/dev/null \
1492 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1493 changequote([,])dnl
1494 rm -f conftest*])
1495 AC_SUBST(libc_cv_libgcc_s_suffix)
1497 AC_CACHE_CHECK(for --as-needed option,
1498 libc_cv_as_needed, [dnl
1499 cat > conftest.c <<EOF
1500 int main (void) { return 0; }
1501 EOF
1502 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1503 -fPIC -shared -o conftest.so conftest.c
1504 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1505 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1506 then
1507 libc_cv_as_needed=yes
1508 else
1509 libc_cv_as_needed=no
1510 fi
1511 rm -f conftest*])
1512 AC_SUBST(libc_cv_as_needed)
1514 ASFLAGS_config=
1515 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1516 libc_cv_as_noexecstack, [dnl
1517 cat > conftest.c <<EOF
1518 void foo (void) { }
1519 EOF
1520 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1521 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1522 && grep -q .note.GNU-stack conftest.s \
1523 && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wa,--noexecstack
1524 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1525 then
1526 libc_cv_as_noexecstack=yes
1527 else
1528 libc_cv_as_noexecstack=no
1529 fi
1530 rm -f conftest*])
1531 if test $libc_cv_as_noexecstack = yes; then
1532 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1533 fi
1534 AC_SUBST(ASFLAGS_config)
1536 AC_CACHE_CHECK(for -z combreloc,
1537 libc_cv_z_combreloc, [dnl
1538 cat > conftest.c <<EOF
1539 extern int bar (int);
1540 extern int mumble;
1541 int foo (void) { return bar (mumble); }
1542 EOF
1543 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1544 -fPIC -shared -o conftest.so conftest.c
1545 -nostdlib -nostartfiles
1546 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1547 then
1548 dnl The following test is a bit weak. We must use a tool which can test
1549 dnl cross-platform since the gcc used can be a cross compiler. Without
1550 dnl introducing new options this is not easily doable. Instead use a tool
1551 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1552 dnl look for a section named .rel.dyn.
1553 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1554 libc_cv_z_combreloc=yes
1555 else
1556 libc_cv_z_combreloc=no
1557 fi
1558 else
1559 libc_cv_z_combreloc=no
1560 fi
1561 rm -f conftest*])
1562 if test "$libc_cv_z_combreloc" = yes; then
1563 AC_DEFINE(HAVE_Z_COMBRELOC)
1564 fi
1565 AC_SUBST(libc_cv_z_combreloc)
1567 AC_CACHE_CHECK(for -z execstack,
1568 libc_cv_z_execstack, [dnl
1569 cat > conftest.c <<EOF
1570 int _start (void) { return 42; }
1571 EOF
1572 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1573 -fPIC -shared -o conftest.so conftest.c
1574 -Wl,-z,execstack -nostdlib
1575 1>&AS_MESSAGE_LOG_FD])
1576 then
1577 libc_cv_z_execstack=yes
1578 else
1579 libc_cv_z_execstack=no
1580 fi
1581 rm -f conftest*])
1582 AC_SUBST(libc_cv_z_execstack)
1584 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1585 cat > conftest.c <<EOF
1586 int foo;
1587 main () { return 0;}
1588 EOF
1589 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1590 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1591 then
1592 libc_cv_fpie=yes
1593 else
1594 libc_cv_fpie=no
1595 fi
1596 rm -f conftest*])
1598 AC_SUBST(libc_cv_fpie)
1600 AC_CACHE_CHECK(for --hash-style option,
1601 libc_cv_hashstyle, [dnl
1602 cat > conftest.c <<EOF
1603 int _start (void) { return 42; }
1604 EOF
1605 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1606 -fPIC -shared -o conftest.so conftest.c
1607 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1608 then
1609 libc_cv_hashstyle=yes
1610 else
1611 libc_cv_hashstyle=no
1612 fi
1613 rm -f conftest*])
1614 AC_SUBST(libc_cv_hashstyle)
1615 fi
1617 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1618 cat > conftest.c <<EOF
1619 int foo;
1620 EOF
1621 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1622 conftest.c 1>&AS_MESSAGE_LOG_FD])
1623 then
1624 libc_cv_fno_toplevel_reorder=yes
1625 else
1626 libc_cv_fno_toplevel_reorder=no
1627 fi
1628 rm -f conftest*])
1629 if test $libc_cv_fno_toplevel_reorder = yes; then
1630 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1631 else
1632 fno_unit_at_a_time=-fno-unit-at-a-time
1633 fi
1634 AC_SUBST(fno_unit_at_a_time)
1636 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1637 cat > conftest.c <<EOF
1638 int foo;
1639 main () { return 0;}
1640 EOF
1641 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -fstack-protector
1642 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1643 then
1644 libc_cv_ssp=yes
1645 else
1646 libc_cv_ssp=no
1647 fi
1648 rm -f conftest*])
1649 AC_SUBST(libc_cv_ssp)
1651 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1652 cat > conftest.c <<EOF
1653 int foo;
1654 #ifdef __GNUC_GNU_INLINE__
1655 main () { return 0;}
1656 #else
1657 #error
1658 #endif
1659 EOF
1660 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1661 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1662 then
1663 libc_cv_gnu89_inline=yes
1664 else
1665 libc_cv_gnu89_inline=no
1666 fi
1667 rm -f conftest*])
1668 if test $libc_cv_gnu89_inline = yes; then
1669 libc_cv_gnu89_inline=-fgnu89-inline
1670 else
1671 libc_cv_gnu89_inline=
1672 fi
1673 AC_SUBST(libc_cv_gnu89_inline)
1675 if test $elf != yes; then
1676 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1677 [AC_TRY_COMPILE(, [asm (".section .init");
1678 asm (".section .fini");
1679 asm ("${libc_cv_dot_text}");],
1680 libc_cv_have_initfini=yes,
1681 libc_cv_have_initfini=no)])
1682 AC_SUBST(libc_cv_have_initfini)dnl
1683 if test $libc_cv_have_initfini = yes; then
1684 AC_DEFINE(HAVE_INITFINI)
1685 fi
1686 fi
1688 if test $elf = yes; then
1689 AC_CACHE_CHECK(whether cc puts quotes around section names,
1690 libc_cv_have_section_quotes,
1691 [cat > conftest.c <<EOF
1692 static const int foo
1693 __attribute__ ((section ("bar"))) = 1;
1694 EOF
1695 if ${CC-cc} -S conftest.c -o conftest.s; then
1696 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1697 libc_cv_have_section_quotes=yes
1698 else
1699 libc_cv_have_section_quotes=no
1700 fi
1701 else
1702 libc_cv_have_section_quotes=unknown
1703 fi
1704 rm -f conftest.[cs]
1705 ])
1706 if test $libc_cv_have_section_quotes = yes; then
1707 AC_DEFINE(HAVE_SECTION_QUOTES)
1708 fi
1709 fi
1711 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1712 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1713 [cat > conftest.$ac_ext <<EOF
1714 dnl This sometimes fails to find confdefs.h, for some reason.
1715 dnl [#]line $LINENO "[$]0"
1716 [#]line $LINENO "configure"
1717 #include "confdefs.h"
1718 void underscore_test(void) {
1719 return; }
1720 EOF
1721 if AC_TRY_EVAL(ac_compile); then
1722 if grep _underscore_test conftest* >/dev/null; then
1723 ifelse([$1], , :, [rm -f conftest*
1724 $1])
1725 else
1726 ifelse([$2], , , [rm -f conftest*
1727 $2])
1728 fi
1729 else
1730 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1731 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1732 ifelse([$2], , , [rm -f conftest*
1733 $2])
1734 fi
1735 rm -f conftest*])
1737 if test $elf = yes; then
1738 libc_cv_asm_underscores=no
1739 else
1740 if test $ac_cv_prog_cc_works = yes; then
1741 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1742 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1743 libc_cv_asm_underscores=yes,
1744 libc_cv_asm_underscores=no)])
1745 else
1746 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1747 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1748 libc_cv_asm_underscores=no)])
1749 fi
1750 fi
1751 if test $libc_cv_asm_underscores = no; then
1752 AC_DEFINE(NO_UNDERSCORES)
1753 fi
1755 if test $elf = yes; then
1756 libc_cv_weak_symbols=yes
1757 fi
1759 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1760 [dnl
1761 cat > conftest.s <<EOF
1762 ${libc_cv_dot_text}
1763 ${libc_cv_asm_global_directive} foo
1764 foo:
1765 .weak foo
1766 .weak bar; bar = foo
1767 EOF
1768 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1769 libc_cv_asm_weak_directive=yes
1770 else
1771 libc_cv_asm_weak_directive=no
1772 fi
1773 rm -f conftest*])
1775 if test $libc_cv_asm_weak_directive = no; then
1776 AC_CACHE_CHECK(for assembler .weakext directive,
1777 libc_cv_asm_weakext_directive,
1778 [dnl
1779 cat > conftest.s <<EOF
1780 ${libc_cv_dot_text}
1781 ${libc_cv_asm_global_directive} foo
1782 foo:
1783 .weakext bar foo
1784 .weakext baz
1785 ${libc_cv_asm_global_directive} baz
1786 baz:
1787 EOF
1788 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1789 libc_cv_asm_weakext_directive=yes
1790 else
1791 libc_cv_asm_weakext_directive=no
1792 fi
1793 rm -f conftest*])
1795 fi # no .weak
1797 if test $libc_cv_asm_weak_directive = yes; then
1798 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1799 elif test $libc_cv_asm_weakext_directive = yes; then
1800 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1801 fi
1803 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1804 case $machine in
1805 sparc/sparc64*) cfi_offset=2047;;
1806 *) cfi_offset=0;;
1807 esac
1808 cat > conftest.s <<EOF
1809 .text
1810 .type func,%function
1811 func:
1812 .cfi_startproc
1813 .cfi_remember_state
1814 .cfi_rel_offset 1, $cfi_offset
1815 .cfi_endproc
1816 EOF
1817 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1818 libc_cv_asm_cfi_directives=yes
1819 else
1820 libc_cv_asm_cfi_directives=no
1821 fi
1822 rm -f conftest*])
1823 if test $libc_cv_asm_cfi_directives = yes; then
1824 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1825 fi
1827 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1828 cat > conftest.c <<\EOF
1829 _start () {}
1830 int __eh_pc;
1831 __throw () {}
1832 EOF
1833 dnl No \ in command here because it ends up inside ''.
1834 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1835 -nostdlib -nostartfiles -Wl,--no-whole-archive
1836 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1837 libc_cv_ld_no_whole_archive=yes
1838 else
1839 libc_cv_ld_no_whole_archive=no
1840 fi
1841 rm -f conftest*])
1842 if test $libc_cv_ld_no_whole_archive = yes; then
1843 no_whole_archive=-Wl,--no-whole-archive
1844 fi
1845 AC_SUBST(no_whole_archive)dnl
1847 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1848 cat > conftest.c <<\EOF
1849 _start () {}
1850 int __eh_pc;
1851 __throw () {}
1852 EOF
1853 dnl No \ in command here because it ends up inside ''.
1854 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1855 -nostdlib -nostartfiles -fexceptions
1856 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1857 libc_cv_gcc_exceptions=yes
1858 else
1859 libc_cv_gcc_exceptions=no
1860 fi
1861 rm -f conftest*])
1862 if test $libc_cv_gcc_exceptions = yes; then
1863 exceptions=-fexceptions
1864 fi
1865 AC_SUBST(exceptions)dnl
1867 if test "$host_cpu" = powerpc ; then
1868 # Check for a bug present in at least versions 2.8.x of GCC
1869 # and versions 1.0.x of EGCS.
1870 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1871 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1872 libc_cv_c_asmcr0_bug='no',
1873 libc_cv_c_asmcr0_bug='yes')])
1874 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1875 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1876 fi
1877 fi
1879 dnl Check whether compiler understands __builtin_expect.
1880 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1881 [cat > conftest.c <<EOF
1882 #line $LINENO "configure"
1883 int foo (int a)
1884 {
1885 a = __builtin_expect (a, 10);
1886 return a == 10 ? 0 : 1;
1887 }
1888 EOF
1889 dnl No \ in command here because it ends up inside ''.
1890 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1891 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1892 libc_cv_gcc_builtin_expect=yes
1893 else
1894 libc_cv_gcc_builtin_expect=no
1895 fi
1896 rm -f conftest*])
1897 if test "$libc_cv_gcc_builtin_expect" = yes; then
1898 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1899 fi
1901 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1902 cat > conftest.c <<\EOF
1903 void zero (void *x)
1904 {
1905 __builtin_memset (x, 0, 1000);
1906 }
1907 EOF
1908 dnl
1909 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1910 then
1911 libc_cv_gcc_builtin_memset=no
1912 else
1913 libc_cv_gcc_builtin_memset=yes
1914 fi
1915 rm -f conftest* ])
1916 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1917 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1918 fi
1920 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1921 cat > conftest.c <<\EOF
1922 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1923 char *foo (const char *a, const char *b)
1924 {
1925 return __builtin_strstr (a, b);
1926 }
1927 EOF
1928 dnl
1929 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1930 then
1931 libc_cv_gcc_builtin_redirection=yes
1932 else
1933 libc_cv_gcc_builtin_redirection=no
1934 fi
1935 rm -f conftest* ])
1936 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
1937 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
1938 fi
1940 dnl Check whether the compiler supports the __thread keyword.
1941 if test "x$use__thread" != xno; then
1942 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1943 [cat > conftest.c <<\EOF
1944 __thread int a = 42;
1945 EOF
1946 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1947 libc_cv_gcc___thread=yes
1948 else
1949 libc_cv_gcc___thread=no
1950 fi
1951 rm -f conftest*])
1952 if test "$libc_cv_gcc___thread" = yes; then
1953 AC_DEFINE(HAVE___THREAD)
1954 fi
1955 else
1956 libc_cv_gcc___thread=no
1957 fi
1959 if test "$libc_cv_gcc___thread" = yes; then
1960 dnl Check whether the compiler supports the tls_model attribute.
1961 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1962 cat > conftest.c <<\EOF
1963 extern __thread int a __attribute__((tls_model ("initial-exec")));
1964 EOF
1965 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1966 libc_cv_gcc_tls_model_attr=yes
1967 else
1968 libc_cv_gcc_tls_model_attr=no
1969 fi
1970 rm -f conftest*])
1971 if test "$libc_cv_gcc_tls_model_attr" = yes; then
1972 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
1973 fi
1974 fi
1976 dnl Check whether we have the gd library available.
1977 AC_MSG_CHECKING(for libgd)
1978 if test "$with_gd" != "no"; then
1979 old_CFLAGS="$CFLAGS"
1980 CFLAGS="$CFLAGS $libgd_include"
1981 old_LDFLAGS="$LDFLAGS"
1982 LDFLAGS="$LDFLAGS $libgd_ldflags"
1983 old_LIBS="$LIBS"
1984 LIBS="$LIBS -lgd -lpng -lz -lm"
1985 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1986 CFLAGS="$old_CFLAGS"
1987 LDFLAGS="$old_LDFLAGS"
1988 LIBS="$old_LIBS"
1989 else
1990 LIBGD=no
1991 fi
1992 AC_MSG_RESULT($LIBGD)
1993 AC_SUBST(LIBGD)
1995 # SELinux detection
1996 if test x$with_selinux = xno ; then
1997 have_selinux=no;
1998 else
1999 # See if we have the SELinux library
2000 AC_CHECK_LIB(selinux, is_selinux_enabled,
2001 have_selinux=yes, have_selinux=no)
2002 # See if we have the SELinux header with the NSCD permissions in it.
2003 if test x$have_selinux = xyes ; then
2004 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
2005 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
2006 [#ifdef NSCD__SHMEMHOST
2007 return 0;
2008 #else
2009 #error NSCD__SHMEMHOST not defined
2010 #endif],
2011 have_selinux=yes, have_selinux=no)
2012 AC_MSG_RESULT($have_selinux)
2013 fi
2015 if test x$with_selinux = xyes ; then
2016 if test x$have_selinux = xno ; then
2017 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
2018 fi
2019 fi
2020 fi
2021 # Check if we're building with SELinux support.
2022 if test "x$have_selinux" = xyes; then
2023 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2025 # See if we have the libaudit library
2026 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2027 have_libaudit=yes, have_libaudit=no)
2028 if test "x$have_libaudit" = xyes; then
2029 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2030 fi
2031 AC_SUBST(have_libaudit)
2033 # See if we have the libcap library
2034 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2035 if test "x$have_libcap" = xyes; then
2036 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2037 fi
2038 AC_SUBST(have_libcap)
2039 fi
2040 AC_SUBST(have_selinux)
2042 dnl check for the size of 'long double'.
2043 AC_CHECK_SIZEOF(long double, 0)
2044 sizeof_long_double=$ac_cv_sizeof_long_double
2045 AC_SUBST(sizeof_long_double)
2047 ### End of automated tests.
2048 ### Now run sysdeps configure fragments.
2050 # They also can set these variables.
2051 use_ldconfig=no
2052 ldd_rewrite_script=no
2053 libc_cv_sysconfdir=$sysconfdir
2054 libc_cv_gcc_unwind_find_fde=no
2055 libc_cv_idn=no
2057 # Iterate over all the sysdep directories we will use, running their
2058 # configure fragments, and looking for a uname implementation.
2059 uname=
2060 for dir in $sysnames; do
2061 case $dir in
2062 /*) dest=$dir ;;
2063 *) dest=$srcdir/$dir ;;
2064 esac
2065 if test -r $dest/configure; then
2066 AC_MSG_RESULT(running configure fragment for $dir)
2067 . $dest/configure
2068 fi
2069 [
2070 if test -z "$uname"; then
2071 if test -r $dest/uname.c ||
2072 test -r $dest/uname.S ||
2073 { test -r $dest/syscalls.list &&
2074 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
2075 uname=$dir
2076 fi
2077 fi
2078 ]dnl
2079 done
2081 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2082 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2083 fi
2084 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2086 # If we will use the generic uname implementation, we must figure out what
2087 # it will say by examining the system, and write the results in config-name.h.
2088 if test "$uname" = "sysdeps/generic"; then
2090 changequote(,)dnl
2091 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
2092 changequote([,])dnl
2093 if test $uname_sysname != $config_os; then
2094 config_release=`echo $config_os | sed s/$uname_sysname//`
2095 fi
2096 dnl
2097 AC_DEFUN(LIBC_KERNEL_ID, [dnl
2098 if test -r /vmunix; then
2099 kernel_id=`strings /vmunix | grep UNIX`
2100 elif test -r /dynix; then
2101 kernel_id=`strings /dynix | grep DYNIX`
2102 else
2103 kernel_id=
2104 fi
2105 ])dnl
2107 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
2108 LIBC_KERNEL_ID
2109 changequote(,)dnl
2110 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
2111 changequote([,])dnl
2112 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
2113 != x$config_release; then
2114 # The configuration release is a substring of the kernel release.
2115 libc_cv_uname_release=$kernel_release
2116 elif test x$config_release != x; then
2117 libc_cv_uname_release=$config_release
2118 elif test x$kernel_release != x; then
2119 libc_cv_uname_release=$kernel_release
2120 else
2121 libc_cv_uname_release=unknown
2122 fi])
2123 uname_release="$libc_cv_uname_release"
2125 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
2126 LIBC_KERNEL_ID
2127 changequote(,)dnl
2128 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
2129 changequote([,])dnl
2130 if test -n "$kernel_version"; then
2131 libc_cv_uname_version="$kernel_version"
2132 else
2133 libc_cv_uname_version=unknown
2134 fi])
2135 uname_version="$libc_cv_uname_version"
2137 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
2138 config_uname=config-name.h:config-name.in
2139 else
2140 # For non-generic uname, we don't need to create config-name.h at all.
2141 config_uname=
2142 fi
2144 dnl This is tested by existing code and it's simpler to avoid changing it.
2145 AC_DEFINE(USE_IN_LIBIO)
2147 # Test for old glibc 2.0.x headers so that they can be removed properly
2148 # Search only in includedir.
2149 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2150 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2151 then
2152 old_glibc_headers=yes
2153 else
2154 old_glibc_headers=no
2155 fi
2156 AC_MSG_RESULT($old_glibc_headers)
2157 if test ${old_glibc_headers} = yes; then
2158 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2159 AC_MSG_WARN(*** be removed.)
2160 fi
2161 AC_SUBST(old_glibc_headers)
2163 AC_SUBST(libc_cv_slibdir)
2164 AC_SUBST(libc_cv_localedir)
2165 AC_SUBST(libc_cv_sysconfdir)
2166 AC_SUBST(libc_cv_rootsbindir)
2167 AC_SUBST(libc_cv_forced_unwind)
2169 AC_SUBST(use_ldconfig)
2170 AC_SUBST(ldd_rewrite_script)
2172 AC_SUBST(elf) AC_SUBST(xcoff)
2173 if test $elf = yes; then
2174 AC_DEFINE(HAVE_ELF)
2175 fi
2176 if test $xcoff = yes; then
2177 AC_DEFINE(HAVE_XCOFF)
2178 fi
2180 AC_SUBST(static)
2181 AC_SUBST(shared)
2182 if test $shared = default; then
2183 shared=$elf
2184 fi
2186 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
2187 [pic_default=yes
2188 cat > conftest.c <<EOF
2189 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2190 # error PIC is default.
2191 #endif
2192 EOF
2193 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2194 pic_default=no
2195 fi
2196 rm -f conftest.*])
2197 AC_SUBST(pic_default)
2199 AC_SUBST(profile)
2200 AC_SUBST(omitfp)
2201 AC_SUBST(bounded)
2202 AC_SUBST(static_nss)
2203 AC_SUBST(nopic_initfini)
2205 AC_SUBST(DEFINES)
2207 dnl See sysdeps/mach/configure.in for this variable.
2208 AC_SUBST(mach_interface_list)
2210 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2211 config_makefile=
2212 else
2213 config_makefile=Makefile
2214 fi
2216 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2217 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2218 AC_SUBST(VERSION)
2219 AC_SUBST(RELEASE)
2221 AC_CONFIG_FILES([config.make ${config_makefile} ${config_uname}])
2222 AC_CONFIG_COMMANDS([default],[[
2223 case $CONFIG_FILES in *config.make*)
2224 echo "$config_vars" >> config.make;;
2225 esac
2226 test -d bits || mkdir bits]],[[config_vars='$config_vars']])
2227 AC_OUTPUT