| blob | 6a7e51d853ae81c76c1375f26ccca8b55e2237e5 |
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=$config_os
304 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
305 # Unify this here.
306 if test "$machine" = rs6000; then
307 machine="powerpc"
308 fi
310 # Braindead PowerPC box with absolutely no FPU.
311 case "$machine-$host_os" in
312 powerpc*-*soft)
313 with_fp=no
314 ;;
315 esac
317 submachine=
318 AC_ARG_WITH([cpu],
319 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
320 [dnl
321 case "$withval" in
322 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
323 no) ;;
324 *) submachine="$withval" ;;
325 esac
326 ])
329 # An add-on can set this when it wants to disable the sanity check below.
330 libc_config_ok=no
332 dnl Having this here, though empty, makes sure that if add-ons' fragments
333 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
334 dnl our AC_OUTPUT will actually use it.
335 AC_CONFIG_SUBDIRS()
337 case "$enable_add_ons" in
338 ''|no) add_ons= ;;
339 yes|'*')
340 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
341 sed 's@/[[^/]]*$@@' | sort | uniq`
342 add_ons_automatic=yes
343 ;;
344 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
345 add_ons_automatic=no ;;
346 esac
348 configured_add_ons=
349 add_ons_sfx=
350 add_ons_pfx=
351 if test x"$add_ons" != x; then
352 for f in $add_ons; do
353 # Some sanity checks
354 case "$f" in
355 crypt)
356 AC_MSG_ERROR([
357 *** It seems that you're using an old \`crypt' add-on. crypt is now
358 *** part of glibc and using the old add-on will not work with this
359 *** release. Start again with fresh sources and without the old
360 *** \`crypt' add-on.])
361 ;;
362 localedata)
363 AC_MSG_ERROR([
364 *** It seems that you're using an old \`localedata' add-on. localedata
365 *** is now part of glibc and using the old add-on will not work with
366 *** this release. Start again with fresh sources and without the old
367 *** \`localedata' add-on.])
368 ;;
369 esac
370 done
372 # Now source each add-on's configure fragment.
373 # The fragments can use $srcdir/$libc_add_on to find themselves,
374 # and test $add_ons_automatic to see if they were explicitly requested.
375 # A fragment can clear (or even change) $libc_add_on to affect
376 # whether it goes into the list to be actually used in the build.
377 use_add_ons=
378 for libc_add_on in $add_ons; do
379 # Test whether such a directory really exists.
380 # It can be absolute, or relative to $srcdir, or relative to the build dir.
381 case "$libc_add_on" in
382 /*)
383 libc_add_on_srcdir=$libc_add_on
384 ;;
385 *)
386 test -d "$srcdir/$libc_add_on" || {
387 if test -d "$libc_add_on"; then
388 libc_add_on="`pwd`/$libc_add_on"
389 else
390 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
391 fi
392 }
393 libc_add_on_srcdir=$srcdir/$libc_add_on
394 ;;
395 esac
397 libc_add_on_frag=$libc_add_on_srcdir/configure
398 libc_add_on_canonical=
399 if test -r "$libc_add_on_frag"; then
400 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
401 libc_add_on_canonical=unknown
402 libc_add_on_subdirs=
403 . "$libc_add_on_frag"
404 test -z "$libc_add_on" || {
405 configured_add_ons="$configured_add_ons $libc_add_on"
406 if test "x$libc_add_on_canonical" = xunknown; then
407 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
408 fi
409 for d in $libc_add_on_subdirs; do
410 case "$libc_add_on" in
411 /*) subdir_srcdir="$libc_add_on" ;;
412 *) subdir_srcdir="\$(..)$libc_add_on" ;;
413 esac
414 case "$d" in
415 .)
416 d="${libc_add_on_canonical:-$libc_add_on}"
417 ;;
418 /*)
419 subdir_srcdir="$d"
420 ;;
421 *)
422 subdir_srcdir="$subdir_srcdir/$d"
423 ;;
424 esac
425 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
426 add_on_subdirs="$add_on_subdirs $d"
427 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
428 $d-srcdir = $subdir_srcdir"
429 done
430 }
431 fi
432 if test -n "$libc_add_on"; then
433 if frags=`ls -d $libc_add_on_srcdir/sysdeps/*/preconfigure 2> /dev/null`
434 then
435 AC_MSG_CHECKING(add-on $libc_add_on for preconfigure fragments)
436 for frag in $frags; do
437 name=`echo "$frag" | sed 's@/[[^/]]*$@@;s@^.*/@@'`
438 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
439 . "$frag"
440 done
441 AC_MSG_RESULT()
442 fi
443 use_add_ons="$use_add_ons $libc_add_on"
444 add_ons_pfx="$add_ons_pfx $libc_add_on/"
445 test -z "$libc_add_on_canonical" ||
446 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
447 fi
448 done
449 # Use echo to strip excess whitespace.
450 add_ons="`echo $use_add_ons`"
451 fi
452 AC_SUBST(add_ons)
453 AC_SUBST(add_on_subdirs)
456 ###
457 ### I put this here to prevent those annoying emails from people who cannot
458 ### read and try to compile glibc on unsupported platforms. --drepper
459 ###
460 ### By using the undocumented --enable-hacker-mode option for configure
461 ### one can skip this test to make the configuration not fail for unsupported
462 ### platforms.
463 ###
464 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
465 case "$machine-$host_os" in
466 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
467 ;;
468 *)
469 echo "*** The GNU C library is currently not available for this platform."
470 echo "*** So far nobody cared to port it and if there is no volunteer it"
471 echo "*** might never happen. So, if you have interest to see glibc on"
472 echo "*** this platform visit"
473 echo "*** http://www.gnu.org/software/libc/porting.html"
474 echo "*** and join the group of porters"
475 exit 1
476 ;;
477 esac
478 fi
480 dnl We need to use [ and ] for other purposes for a while now.
481 changequote(,)dnl
482 # Expand the configuration machine name into a subdirectory by architecture
483 # type and particular chip. If an add-on configure fragment already set
484 # base_machine, we don't change it.
485 test -n "$base_machine" || case "$machine" in
486 a29k | am29000) base_machine=a29k machine=a29k ;;
487 alpha*) base_machine=alpha machine=alpha/$machine ;;
488 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
489 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
490 i[34567]86) base_machine=i386 machine=i386/$machine ;;
491 ia64) base_machine=ia64 machine=ia64 ;;
492 m88???) base_machine=m88k machine=m88k/$machine ;;
493 m88k) base_machine=m88k machine=m88k/m88100 ;;
494 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
495 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
496 s390) base_machine=s390 machine=s390/s390-32 ;;
497 s390x) base_machine=s390 machine=s390/s390-64 ;;
498 sh3*) base_machine=sh machine=sh/sh3 ;;
499 sh4*) base_machine=sh machine=sh/sh4 ;;
500 sparc | sparcv[67])
501 base_machine=sparc machine=sparc/sparc32 ;;
502 sparcv8 | supersparc | hypersparc)
503 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
504 sparcv8plus | sparcv8plusa | sparcv9)
505 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
506 sparcv8plusb | sparcv9b)
507 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
508 sparcv9v)
509 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
510 sparc64)
511 base_machine=sparc machine=sparc/sparc64 ;;
512 sparc64b)
513 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
514 sparc64v)
515 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
516 *) base_machine=$machine ;;
517 esac
518 changequote([,])dnl
519 AC_SUBST(base_machine)
521 if test "$base_machine" = "i386"; then
522 AC_DEFINE(USE_REGPARMS)
523 fi
525 # Compute the list of sysdep directories for this configuration.
526 # This can take a while to compute.
527 sysdep_dir=$srcdir/sysdeps
528 AC_MSG_CHECKING(sysdep dirs)
529 dnl We need to use [ and ] for other purposes for a while now.
530 changequote(,)dnl
531 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
532 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
534 case "$os" in
535 gnu*)
536 base_os=mach/hurd ;;
537 netbsd* | 386bsd* | freebsd* | bsdi*)
538 base_os=unix/bsd/bsd4.4 ;;
539 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
540 base_os=unix/bsd ;;
541 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
542 base_os=unix/sysv ;;
543 irix6*)
544 base_os=unix/sysv/irix6/$os ;;
545 solaris[2-9]*)
546 base_os=unix/sysv/sysv4 ;;
547 hpux*)
548 base_os=unix/sysv/hpux/$os ;;
549 aix4.3*)
550 base_os=unix/sysv/aix/aix4.3 ;;
551 none)
552 base_os=standalone ;;
553 *)
554 base_os='' ;;
555 esac
557 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
558 tail=$os
559 ostry=$os
560 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
561 ostry="$ostry /$o"
562 tail=$o
563 done
564 o=`echo $tail | sed 's/[0-9]*$//'`
565 if test $o != $tail; then
566 ostry="$ostry /$o"
567 fi
568 # For linux-gnu, try linux-gnu, then linux.
569 o=`echo $tail | sed 's/-.*$//'`
570 if test $o != $tail; then
571 ostry="$ostry /$o"
572 fi
574 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
575 base=
576 tail=$base_os
577 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
578 set $b
579 base="$base /$1"
580 tail="$2"
581 done
583 # For sparc/sparc32, try sparc/sparc32 and then sparc.
584 mach=
585 tail=$machine${submachine:+/$submachine}
586 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
587 set $m
588 # Prepend the machine's FPU directory unless --without-fp.
589 if test "$with_fp" = yes; then
590 mach="$mach /$1/fpu"
591 else
592 mach="$mach /$1/nofpu"
593 fi
594 mach="$mach /$1"
595 tail="$2"
596 done
598 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
599 changequote([,])dnl
601 # Find what sysdep directories exist.
602 sysnames_add_ons=
603 sysnames=
604 for b in $base ''; do
605 for m0 in $mach ''; do
606 for v in /$vendor ''; do
607 test "$v" = / && continue
608 for o in /$ostry ''; do
609 test "$o" = / && continue
610 for m in $mach ''; do
611 for d in $add_ons_pfx ''; do
612 for a in $add_ons_sfx ''; do
613 if test -n "$m0$m0sub$b$v$o$m$msub"; then
614 try_srcdir="${srcdir}/"
615 case "$d" in
616 /*) try_srcdir= ;;
617 esac
618 try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
619 test -n "$enable_debug_configure" &&
620 echo "$0 [DEBUG]: try $try" >&2
621 if test -d "$try_srcdir$try"; then
622 sysnames="$sysnames $try"
623 { test -n "$o" || test -n "$b"; } && os_used=t
624 { test -n "$m" || test -n "$m0"; } && machine_used=t
625 case x${m0:-$m} in
626 x*/$submachine) submachine_used=t ;;
627 esac
628 if test -n "$d"; then
629 case "$sysnames_add_ons" in
630 *" $d "*) ;;
631 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
632 esac
633 fi
634 fi
635 fi
636 done
637 done
638 done
639 done
640 done
641 done
642 done
644 if test -z "$os_used" && test "$os" != none; then
645 AC_MSG_ERROR(Operating system $os is not supported.)
646 fi
647 if test -z "$machine_used" && test "$machine" != none; then
648 AC_MSG_ERROR(The $machine is not supported.)
649 fi
650 if test -z "$submachine_used" && test -n "$submachine"; then
651 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
652 fi
653 AC_SUBST(submachine)
655 # We have now validated the configuration.
658 # If using ELF, look for an `elf' subdirectory of each machine directory.
659 # We prepend these rather than inserting them whereever the machine appears
660 # because things specified by the machine's ELF ABI should override
661 # OS-specific things, and should always be the same for any OS on the
662 # machine (otherwise what's the point of an ABI?).
663 if test "$elf" = yes; then
664 elf_dirs=
665 for d in $add_ons_pfx ''; do
666 for m in $mach; do
667 if test -d $srcdir/${d}sysdeps$m/elf; then
668 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
669 fi
670 done
671 done
672 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
673 fi
676 # Expand the list of system names into a full list of directories
677 # from each element's parent name and Implies file (if present).
678 set $sysnames
679 names=
680 while test $# -gt 0; do
681 name=$1
682 shift
684 case " $names " in *" $name "*)
685 # Already in the list.
686 continue
687 esac
689 # Report each name as we discover it, so there is no long pause in output.
690 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
692 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
694 case $name in
695 /*) xsrcdir= ;;
696 *) xsrcdir=$srcdir/ ;;
697 esac
698 test -n "$enable_debug_configure" &&
699 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
701 if test -f $xsrcdir$name/Implies; then
702 # Collect more names from the `Implies' file (removing comments).
703 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
704 implied=
705 for x in $implied_candidate; do
706 found=no
707 if test -d $xsrcdir$name_base/$x; then
708 implied="$implied $name_base/$x";
709 found=yes
710 fi
711 for d in $add_ons_pfx ''; do
712 try="${d}sysdeps/$x"
713 case $d in
714 /*) try_srcdir= ;;
715 *) try_srcdir=$srcdir/ ;;
716 esac
717 test -n "$enable_debug_configure" &&
718 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
719 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
720 then
721 implied="$implied $try"
722 found=yes
723 case "$sysnames_add_ons" in
724 *" $d "*) ;;
725 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
726 esac
727 fi
728 done
729 if test $found = no; then
730 AC_MSG_WARN($name/Implies specifies nonexistent $x)
731 fi
732 done
733 else
734 implied=
735 fi
737 # Add NAME to the list of names.
738 names="$names $name"
740 # Find the parent of NAME, using the empty string if it has none.
741 changequote(,)dnl
742 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
743 changequote([,])dnl
745 # Add the names implied by NAME, and NAME's parent (if it has one), to
746 # the list of names to be processed (the argument list). We prepend the
747 # implied names to the list and append the parent. We want implied
748 # directories to come before further directories inferred from the
749 # configuration components; this ensures that for sysv4, unix/common
750 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
751 # after sysv4).
752 sysnames="`echo $implied $* $parent`"
753 test -n "$sysnames" && set $sysnames
754 done
756 # Add the default directories.
757 default_sysnames=sysdeps/generic
758 if test "$elf" = yes; then
759 default_sysnames="sysdeps/generic/elf $default_sysnames"
760 fi
761 sysnames="$names $default_sysnames"
762 AC_SUBST(sysnames)
763 # The other names were emitted during the scan.
764 AC_MSG_RESULT($default_sysnames)
766 # Collect the list of add-ons that supply partial sysdeps trees.
767 sysdeps_add_ons=
768 for add_on in $add_ons; do
769 case "$add_on" in
770 /*) xsrcdir= ;;
771 *) xsrcdir="$srcdir/" ;;
772 esac
774 test -d "$xsrcdir$add_on/sysdeps" || {
775 case "$configured_add_ons " in
776 *" $add_on "*) ;;
777 *|'')
778 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
779 ;;
780 esac
781 continue
782 }
784 sysdeps_add_ons="$sysdeps_add_ons $add_on"
785 case "$sysnames_add_ons" in
786 *" $add_on/ "*) ;;
787 *|'')
788 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
789 continue ;;
790 esac
792 found=no
793 for d in $sysnames; do
794 case "$d" in
795 $add_on/sysdeps/*) ;;
796 *) continue ;;
797 esac
798 (cd "$xsrcdir$d" && for f in *[[!~]]; do
799 case "$f" in
800 sys|bits)
801 for ff in $f/*.h; do
802 test -d "$ff" || { test -e "$ff" && exit 88; }
803 done
804 ;;
805 *)
806 test -d "$f" || { test -e "$f" && exit 88; }
807 ;;
808 esac
809 done)
810 if test $? -eq 88; then
811 found=yes
812 break
813 fi
814 done
815 if test $found = no; then
816 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
817 fi
818 done
819 AC_SUBST(sysdeps_add_ons)
822 ### Locate tools.
824 AC_PROG_INSTALL
825 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
826 # The makefiles need to use a different form to find it in $srcdir.
827 INSTALL='\$(..)./scripts/install-sh -c'
828 fi
829 AC_PROG_LN_S
831 AC_PROG_CC
832 if test $host != $build; then
833 AC_CHECK_PROGS(BUILD_CC, gcc cc)
834 fi
835 AC_SUBST(cross_compiling)
836 AC_PROG_CPP
837 # We need the C++ compiler only for testing.
838 AC_PROG_CXX
839 LIBC_PROG_BINUTILS
840 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
842 # Accept binutils 2.13 or newer.
843 AC_CHECK_PROG_VER(AS, $AS, --version,
844 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
845 [2.1[3-9]*], AS=: critic_missing="$critic_missing as")
846 AC_CHECK_PROG_VER(LD, $LD, --version,
847 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
848 [2.1[3-9]*], LD=: critic_missing="$critic_missing ld")
850 # We need the physical current working directory. We cannot use the
851 # "pwd -P" shell builtin since that's not portable. Instead we try to
852 # find a pwd binary. Note that assigning to the PWD environment
853 # variable might have some interesting side effects, so we don't do
854 # that.
855 AC_PATH_PROG(PWD_P, pwd, no)
856 if test "$PWD_P" = no; then
857 AC_MSG_ERROR(*** A pwd binary could not be found.)
858 fi
860 # These programs are version sensitive.
861 AC_CHECK_TOOL_PREFIX
862 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
863 [version \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ],
864 critic_missing="$critic_missing gcc")
865 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
866 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
867 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
869 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
870 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
871 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
872 MSGFMT=: aux_missing="$aux_missing msgfmt")
873 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
874 [GNU texinfo.* \([0-9][0-9.]*\)],
875 [4.*],
876 MAKEINFO=: aux_missing="$aux_missing makeinfo")
877 AC_CHECK_PROG_VER(SED, sed, --version,
878 [GNU sed version \([0-9]*\.[0-9.]*\)],
879 [3.0[2-9]*|3.[1-9]*|[4-9]*],
880 SED=: aux_missing="$aux_missing sed")
882 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
883 case "x$AUTOCONF" in
884 xno|x|x:) AUTOCONF=no ;;
885 *)
886 AC_CACHE_CHECK(dnl
887 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
888 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
889 libc_cv_autoconf_works=yes
890 else
891 libc_cv_autoconf_works=no
892 fi])
893 test $libc_cv_autoconf_works = yes || AUTOCONF=no
894 ;;
895 esac
896 if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
897 # If --without-cvs they probably won't change configure.in, so no complaints.
898 aux_missing="$aux_missing autoconf"
899 fi
901 test -n "$critic_missing" && AC_MSG_ERROR([
902 *** These critical programs are missing or too old:$critic_missing
903 *** Check the INSTALL file for required versions.])
905 test -n "$aux_missing" && AC_MSG_WARN([
906 *** These auxiliary programs are missing or incompatible versions:$aux_missing
907 *** some features will be disabled.
908 *** Check the INSTALL file for required versions.])
910 # if using special system headers, find out the compiler's sekrit
911 # header directory and add that to the list. NOTE: Only does the right
912 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
913 if test -n "$sysheaders"; then
914 ccheaders=`$CC -print-file-name=include`
915 SYSINCLUDES="-nostdinc -isystem $ccheaders \
916 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
917 if test -n "$CXX"; then
918 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
919 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
920 cxxheaders=`$CXX -print-file-name=../../../../include/c++/`"$cxxversion" &&
921 CXX_SYSINCLUDES="-isystem $cxxheaders \
922 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
923 fi
924 fi
925 AC_SUBST(SYSINCLUDES)
926 AC_SUBST(CXX_SYSINCLUDES)
928 # check if ranlib is necessary
929 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
930 cat > conftest.c <<EOF
931 int a;
932 char b;
933 void c(void) {}
934 EOF
935 $CC $CFLAGS $CPPFLAGS -c conftest.c
936 $AR cr conftest.a conftest.o
937 cp conftest.a conftest2.a
938 $RANLIB conftest.a
939 if cmp -s conftest.a conftest2.a; then
940 libc_cv_ranlib_necessary=no
941 else
942 libc_cv_ranlib_necessary=yes
943 fi
944 rm -rf conftest*])
945 if test "$libc_cv_ranlib_necessary" = no; then
946 RANLIB=:
947 fi
949 # Test if LD_LIBRARY_PATH contains the notation for the current directory
950 # since this would lead to problems installing/building glibc.
951 # LD_LIBRARY_PATH contains the current directory if one of the following
952 # is true:
953 # - one of the terminals (":" and ";") is the first or last sign
954 # - two terminals occur directly after each other
955 # - the path contains an element with a dot in it
956 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
957 changequote(,)dnl
958 case ${LD_LIBRARY_PATH} in
959 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
960 ld_library_path_setting="contains current directory"
961 ;;
962 *)
963 ld_library_path_setting="ok"
964 ;;
965 esac
966 changequote([,])dnl
967 AC_MSG_RESULT($ld_library_path_setting)
968 if test "$ld_library_path_setting" != "ok"; then
969 AC_MSG_ERROR([
970 *** LD_LIBRARY_PATH shouldn't contain the current directory when
971 *** building glibc. Please change the environment variable
972 *** and run configure again.])
973 fi
975 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
976 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
977 libc_cv_gcc_static_libgcc=
978 else
979 libc_cv_gcc_static_libgcc=-static-libgcc
980 fi])
981 AC_SUBST(libc_cv_gcc_static_libgcc)
983 AC_PATH_PROG(BASH, bash, no)
984 if test "$BASH" != no &&
985 $BASH -c 'test "$BASH_VERSINFO" \
986 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
987 libc_cv_have_bash2=yes
988 else
989 libc_cv_have_bash2=no
990 fi
991 AC_SUBST(libc_cv_have_bash2)
993 dnl We need a ksh compatible shell for tzselect.
994 if test "$BASH" = no; then
995 AC_PATH_PROG(KSH, ksh, no)
996 if test "$KSH" = no; then
997 libc_cv_have_ksh=no
998 else
999 libc_cv_have_ksh=yes
1000 fi
1001 else
1002 KSH="$BASH"
1003 AC_SUBST(KSH)
1004 libc_cv_have_ksh=yes
1005 fi
1006 AC_SUBST(libc_cv_have_ksh)
1008 AC_PROG_AWK
1009 AC_PATH_PROG(PERL, perl, no)
1010 if test "$PERL" != no &&
1011 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1012 PERL=no
1013 fi
1014 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1015 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1016 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1018 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
1019 echo '#include <stddef.h>
1020 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
1021 if eval "$ac_cpp conftest.c 2>/dev/null" \
1022 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
1023 libc_cv_signed_size_t=no
1024 else
1025 libc_cv_signed_size_t=yes
1026 fi
1027 rm -f conftest*])
1028 if test $libc_cv_signed_size_t = yes; then
1029 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
1030 cat >> confdefs.h <<\EOF
1031 #undef __SIZE_TYPE__
1032 #define __SIZE_TYPE__ unsigned
1033 EOF
1034 fi
1036 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1037 AC_TRY_COMPILE(dnl
1038 [#define __need_size_t
1039 #define __need_wchar_t
1040 #include <stddef.h>
1041 #define __need_NULL
1042 #include <stddef.h>], [size_t size; wchar_t wchar;
1043 #ifdef offsetof
1044 #error stddef.h ignored __need_*
1045 #endif
1046 if (&size == NULL || &wchar == NULL) abort ();],
1047 libc_cv_friendly_stddef=yes,
1048 libc_cv_friendly_stddef=no)])
1049 if test $libc_cv_friendly_stddef = yes; then
1050 config_vars="$config_vars
1051 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1052 fi
1054 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1055 libc_cv_need_minus_P, [dnl
1056 cat > conftest.S <<EOF
1057 #include "confdefs.h"
1058 /* Nothing whatsoever. */
1059 EOF
1060 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1061 libc_cv_need_minus_P=no
1062 else
1063 libc_cv_need_minus_P=yes
1064 fi
1065 rm -f conftest*])
1066 if test $libc_cv_need_minus_P = yes; then
1067 config_vars="$config_vars
1068 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1069 fi
1071 AC_MSG_CHECKING(whether .text pseudo-op must be used)
1072 AC_CACHE_VAL(libc_cv_dot_text, [dnl
1073 cat > conftest.s <<EOF
1074 .text
1075 EOF
1076 libc_cv_dot_text=
1077 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1078 libc_cv_dot_text=.text
1079 fi
1080 rm -f conftest*])
1081 if test -z "$libc_cv_dot_text"; then
1082 AC_MSG_RESULT(no)
1083 else
1084 AC_MSG_RESULT(yes)
1085 fi
1087 AC_CACHE_CHECK(for assembler global-symbol directive,
1088 libc_cv_asm_global_directive, [dnl
1089 libc_cv_asm_global_directive=UNKNOWN
1090 for ac_globl in .globl .global .EXPORT; do
1091 cat > conftest.s <<EOF
1092 ${libc_cv_dot_text}
1093 ${ac_globl} foo
1094 foo:
1095 EOF
1096 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1097 libc_cv_asm_global_directive=${ac_globl}
1098 fi
1099 rm -f conftest*
1100 test $libc_cv_asm_global_directive != UNKNOWN && break
1101 done])
1102 if test $libc_cv_asm_global_directive = UNKNOWN; then
1103 AC_MSG_ERROR(cannot determine asm global directive)
1104 else
1105 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
1106 fi
1108 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1109 cat > conftest.s <<EOF
1110 ${libc_cv_dot_text}
1111 foo:
1112 .set glibc_conftest_frobozz,foo
1113 $libc_cv_asm_global_directive glibc_conftest_frobozz
1114 EOF
1115 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1116 # (but it doesn't work), so we must do a linking check to be sure.
1117 cat > conftest1.c <<\EOF
1118 extern int glibc_conftest_frobozz;
1119 void _start() { glibc_conftest_frobozz = 1; }
1120 EOF
1121 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1122 -nostartfiles -nostdlib \
1123 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1124 libc_cv_asm_set_directive=yes
1125 else
1126 libc_cv_asm_set_directive=no
1127 fi
1128 rm -f conftest*])
1129 if test $libc_cv_asm_set_directive = yes; then
1130 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1131 fi
1133 AC_CACHE_CHECK(for assembler .type directive prefix,
1134 libc_cv_asm_type_prefix, [dnl
1135 libc_cv_asm_type_prefix=no
1136 for ac_try_prefix in '@' '%' '#'; do
1137 cat > conftest.s <<EOF
1138 ${libc_cv_dot_text}
1139 ${libc_cv_asm_global_directive} foo
1140 .type foo, ${ac_try_prefix}object
1141 .size foo, 1
1142 foo:
1143 .byte 1
1144 EOF
1145 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1146 libc_cv_asm_type_prefix=${ac_try_prefix}
1147 fi
1148 rm -f conftest*
1149 test "x$libc_cv_asm_type_prefix" != xno && break
1150 done])
1151 if test "x$libc_cv_asm_type_prefix" != xno; then
1152 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
1153 fi
1155 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1156 [cat > conftest.s <<EOF
1157 ${libc_cv_dot_text}
1158 _sym:
1159 .symver _sym,sym@VERS
1160 EOF
1161 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1162 libc_cv_asm_symver_directive=yes
1163 else
1164 libc_cv_asm_symver_directive=no
1165 fi
1166 rm -f conftest*])
1167 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1168 if test $libc_cv_asm_symver_directive = yes; then
1169 cat > conftest.s <<EOF
1170 ${libc_cv_dot_text}
1171 _sym:
1172 .symver _sym,sym@VERS
1173 EOF
1174 cat > conftest.map <<EOF
1175 VERS_1 {
1176 global: sym;
1177 };
1179 VERS_2 {
1180 global: sym;
1181 } VERS_1;
1182 EOF
1183 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1184 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1185 -o conftest.so conftest.o
1186 -nostartfiles -nostdlib
1187 -Wl,--version-script,conftest.map
1188 1>&AS_MESSAGE_LOG_FD]);
1189 then
1190 libc_cv_ld_version_script_option=yes
1191 else
1192 libc_cv_ld_version_script_option=no
1193 fi
1194 else
1195 libc_cv_ld_version_script_option=no
1196 fi
1197 else
1198 libc_cv_ld_version_script_option=no
1199 fi
1200 rm -f conftest*])
1201 if test $shared != no &&
1202 test $libc_cv_asm_symver_directive = yes &&
1203 test $libc_cv_ld_version_script_option = yes &&
1204 test $enable_versioning = yes; then
1205 VERSIONING=yes
1206 AC_DEFINE(DO_VERSIONING)
1207 else
1208 VERSIONING=no
1209 fi
1210 AC_SUBST(VERSIONING)
1212 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
1213 echo "\
1214 *** WARNING: You should not compile GNU libc without versioning. Not using
1215 *** versioning will introduce incompatibilities so that old binaries
1216 *** will not run anymore.
1217 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1218 fi
1219 if test $elf = yes; then
1220 AC_CACHE_CHECK(for .previous assembler directive,
1221 libc_cv_asm_previous_directive, [dnl
1222 cat > conftest.s <<EOF
1223 .section foo_section
1224 .previous
1225 EOF
1226 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1227 libc_cv_asm_previous_directive=yes
1228 else
1229 libc_cv_asm_previous_directive=no
1230 fi
1231 rm -f conftest*])
1232 if test $libc_cv_asm_previous_directive = yes; then
1233 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1234 else
1235 AC_CACHE_CHECK(for .popsection assembler directive,
1236 libc_cv_asm_popsection_directive, [dnl
1237 cat > conftest.s <<EOF
1238 .pushsection foo_section
1239 .popsection
1240 EOF
1241 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1242 libc_cv_asm_popsection_directive=yes
1243 else
1244 libc_cv_asm_popsection_directive=no
1245 fi
1246 rm -f conftest*])
1247 if test $libc_cv_asm_popsection_directive = yes; then
1248 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1249 fi
1250 fi
1251 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1252 libc_cv_asm_protected_directive, [dnl
1253 cat > conftest.s <<EOF
1254 .protected foo
1255 foo:
1256 .hidden bar
1257 bar:
1258 EOF
1259 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
1260 libc_cv_asm_protected_directive=yes
1261 else
1262 libc_cv_asm_protected_directive=no
1263 fi
1264 rm -f conftest*])
1265 AC_SUBST(libc_cv_asm_protected_directive)
1266 AC_DEFINE(HAVE_PROTECTED)
1267 AC_DEFINE(HAVE_HIDDEN)
1269 if test $libc_cv_asm_protected_directive = yes; then
1270 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1271 libc_cv_visibility_attribute,
1272 [cat > conftest.c <<EOF
1273 int foo __attribute__ ((visibility ("hidden"))) = 1;
1274 int bar __attribute__ ((visibility ("protected"))) = 1;
1275 EOF
1276 libc_cv_visibility_attribute=no
1277 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1278 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1279 if grep '\.protected.*bar' conftest.s >/dev/null; then
1280 libc_cv_visibility_attribute=yes
1281 fi
1282 fi
1283 fi
1284 rm -f conftest.[cs]
1285 ])
1286 if test $libc_cv_visibility_attribute = yes; then
1287 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1288 fi
1289 fi
1291 if test $libc_cv_visibility_attribute = yes; then
1292 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1293 libc_cv_broken_visibility_attribute,
1294 [cat > conftest.c <<EOF
1295 int foo (int x);
1296 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1297 int bar (int x) { return x; }
1298 EOF
1299 libc_cv_broken_visibility_attribute=yes
1300 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
1301 changequote(,)dnl
1302 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1303 changequote([,])dnl
1304 libc_cv_broken_visibility_attribute=no
1305 fi
1306 fi
1307 rm -f conftest.c conftest.s
1308 ])
1309 if test $libc_cv_broken_visibility_attribute = yes; then
1310 AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
1311 fi
1312 fi
1314 AC_CACHE_CHECK(for broken __attribute__((alias())),
1315 libc_cv_broken_alias_attribute,
1316 [cat > conftest.c <<EOF
1317 extern int foo (int x) __asm ("xyzzy");
1318 int bar (int x) { return x; }
1319 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1320 extern int dfoo;
1321 extern __typeof (dfoo) dfoo __asm ("abccb");
1322 int dfoo = 1;
1323 EOF
1324 libc_cv_broken_alias_attribute=yes
1325 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1326 if grep 'xyzzy' conftest.s >/dev/null &&
1327 grep 'abccb' conftest.s >/dev/null; then
1328 libc_cv_broken_alias_attribute=no
1329 fi
1330 fi
1331 rm -f conftest.c conftest.s
1332 ])
1333 if test $libc_cv_broken_alias_attribute = yes; then
1334 AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
1335 fi
1337 if test $libc_cv_visibility_attribute = yes; then
1338 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1339 libc_cv_have_sdata_section,
1340 [echo "int i;" > conftest.c
1341 libc_cv_have_sdata_section=no
1342 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1343 | grep '\.sdata' >/dev/null; then
1344 libc_cv_have_sdata_section=yes
1345 fi
1346 rm -f conftest.c conftest.so
1347 ])
1348 if test $libc_cv_have_sdata_section = yes; then
1349 AC_DEFINE(HAVE_SDATA_SECTION)
1350 fi
1351 fi
1353 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1354 libc_cv_initfini_array, [dnl
1355 cat > conftest.c <<EOF
1356 int _start (void) { return 0; }
1357 int __start (void) { return 0; }
1358 int foo (void) { return 1; }
1359 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1360 EOF
1361 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
1362 -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
1363 then
1364 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1365 libc_cv_initfini_array=yes
1366 else
1367 libc_cv_initfini_array=no
1368 fi
1369 else
1370 libc_cv_initfini_array=no
1371 fi
1372 rm -f conftest*])
1373 if test $libc_cv_initfini_array != yes; then
1374 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1375 fi
1377 AC_CACHE_CHECK(for libunwind-support in compiler,
1378 libc_cv_cc_with_libunwind, [
1379 cat > conftest.c <<EOF
1380 int main (void) { return 0; }
1381 EOF
1382 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1383 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1384 libc_cv_cc_with_libunwind=yes
1385 else
1386 libc_cv_cc_with_libunwind=no
1387 fi
1388 rm -f conftest*])
1389 AC_SUBST(libc_cv_cc_with_libunwind)
1390 if test $libc_cv_cc_with_libunwind = yes; then
1391 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1392 fi
1394 AC_CACHE_CHECK(for -z nodelete option,
1395 libc_cv_z_nodelete, [dnl
1396 cat > conftest.c <<EOF
1397 int _start (void) { return 42; }
1398 EOF
1399 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1400 -fPIC -shared -o conftest.so conftest.c
1401 -nostartfiles -nostdlib
1402 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1403 then
1404 libc_cv_z_nodelete=yes
1405 else
1406 libc_cv_z_nodelete=no
1407 fi
1408 rm -f conftest*])
1409 AC_SUBST(libc_cv_z_nodelete)
1411 AC_CACHE_CHECK(for -z nodlopen option,
1412 libc_cv_z_nodlopen, [dnl
1413 cat > conftest.c <<EOF
1414 int _start (void) { return 42; }
1415 EOF
1416 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1417 -fPIC -shared -o conftest.so conftest.c
1418 -nostartfiles -nostdlib
1419 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1420 then
1421 libc_cv_z_nodlopen=yes
1422 else
1423 libc_cv_z_nodlopen=no
1424 fi
1425 rm -f conftest*])
1426 AC_SUBST(libc_cv_z_nodlopen)
1428 AC_CACHE_CHECK(for -z initfirst option,
1429 libc_cv_z_initfirst, [dnl
1430 cat > conftest.c <<EOF
1431 int _start (void) { return 42; }
1432 EOF
1433 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1434 -fPIC -shared -o conftest.so conftest.c
1435 -nostartfiles -nostdlib
1436 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1437 then
1438 libc_cv_z_initfirst=yes
1439 else
1440 libc_cv_z_initfirst=no
1441 fi
1442 rm -f conftest*])
1443 AC_SUBST(libc_cv_z_initfirst)
1445 AC_CACHE_CHECK(for -z relro option,
1446 libc_cv_z_relro, [dnl
1447 libc_cv_z_relro=no
1448 if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
1449 then
1450 if AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep DATA_SEGMENT_RELRO_END 1>&AS_MESSAGE_LOG_FD])
1451 then
1452 libc_cv_z_relro=yes
1453 fi
1454 fi])
1455 AC_SUBST(libc_cv_z_relro)
1456 if test $libc_cv_z_relro = yes; then
1457 AC_DEFINE(HAVE_Z_RELRO)
1458 fi
1460 AC_CACHE_CHECK(for -Bgroup option,
1461 libc_cv_Bgroup, [dnl
1462 cat > conftest.c <<EOF
1463 int _start (void) { return 42; }
1464 EOF
1465 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1466 -fPIC -shared -o conftest.so conftest.c
1467 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1468 then
1469 libc_cv_Bgroup=yes
1470 else
1471 libc_cv_Bgroup=no
1472 fi
1473 rm -f conftest*])
1474 AC_SUBST(libc_cv_Bgroup)
1476 AC_CACHE_CHECK(for libgcc_s suffix,
1477 libc_cv_libgcc_s_suffix, [dnl
1478 cat > conftest.c <<EOF
1479 int main (void) { return 0; }
1480 EOF
1481 changequote(,)dnl
1482 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1483 -fPIC -shared -shared-libgcc -o conftest.so \
1484 conftest.c -v 2>&1 >/dev/null \
1485 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1486 changequote([,])dnl
1487 rm -f conftest*])
1488 AC_SUBST(libc_cv_libgcc_s_suffix)
1490 AC_CACHE_CHECK(for --as-needed option,
1491 libc_cv_as_needed, [dnl
1492 cat > conftest.c <<EOF
1493 int main (void) { return 0; }
1494 EOF
1495 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1496 -fPIC -shared -o conftest.so conftest.c
1497 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1498 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1499 then
1500 libc_cv_as_needed=yes
1501 else
1502 libc_cv_as_needed=no
1503 fi
1504 rm -f conftest*])
1505 AC_SUBST(libc_cv_as_needed)
1507 ASFLAGS_config=
1508 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1509 libc_cv_as_noexecstack, [dnl
1510 cat > conftest.c <<EOF
1511 void foo (void) { }
1512 EOF
1513 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1514 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1515 && grep -q .note.GNU-stack conftest.s \
1516 && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wa,--noexecstack
1517 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1518 then
1519 libc_cv_as_noexecstack=yes
1520 else
1521 libc_cv_as_noexecstack=no
1522 fi
1523 rm -f conftest*])
1524 if test $libc_cv_as_noexecstack = yes; then
1525 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1526 fi
1527 AC_SUBST(ASFLAGS_config)
1529 AC_CACHE_CHECK(for -z combreloc,
1530 libc_cv_z_combreloc, [dnl
1531 cat > conftest.c <<EOF
1532 extern int bar (int);
1533 extern int mumble;
1534 int foo (void) { return bar (mumble); }
1535 EOF
1536 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1537 -fPIC -shared -o conftest.so conftest.c
1538 -nostdlib -nostartfiles
1539 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1540 then
1541 dnl The following test is a bit weak. We must use a tool which can test
1542 dnl cross-platform since the gcc used can be a cross compiler. Without
1543 dnl introducing new options this is not easily doable. Instead use a tool
1544 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1545 dnl look for a section named .rel.dyn.
1546 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1547 libc_cv_z_combreloc=yes
1548 else
1549 libc_cv_z_combreloc=no
1550 fi
1551 else
1552 libc_cv_z_combreloc=no
1553 fi
1554 rm -f conftest*])
1555 if test "$libc_cv_z_combreloc" = yes; then
1556 AC_DEFINE(HAVE_Z_COMBRELOC)
1557 fi
1558 AC_SUBST(libc_cv_z_combreloc)
1560 AC_CACHE_CHECK(for -z execstack,
1561 libc_cv_z_execstack, [dnl
1562 cat > conftest.c <<EOF
1563 int _start (void) { return 42; }
1564 EOF
1565 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1566 -fPIC -shared -o conftest.so conftest.c
1567 -Wl,-z,execstack -nostdlib
1568 1>&AS_MESSAGE_LOG_FD])
1569 then
1570 libc_cv_z_execstack=yes
1571 else
1572 libc_cv_z_execstack=no
1573 fi
1574 rm -f conftest*])
1575 AC_SUBST(libc_cv_z_execstack)
1577 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1578 cat > conftest.c <<EOF
1579 int foo;
1580 main () { return 0;}
1581 EOF
1582 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1583 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1584 then
1585 libc_cv_fpie=yes
1586 else
1587 libc_cv_fpie=no
1588 fi
1589 rm -f conftest*])
1591 AC_SUBST(libc_cv_fpie)
1593 AC_CACHE_CHECK(for --hash-style option,
1594 libc_cv_hashstyle, [dnl
1595 cat > conftest.c <<EOF
1596 int _start (void) { return 42; }
1597 EOF
1598 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1599 -fPIC -shared -o conftest.so conftest.c
1600 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1601 then
1602 libc_cv_hashstyle=yes
1603 else
1604 libc_cv_hashstyle=no
1605 fi
1606 rm -f conftest*])
1607 AC_SUBST(libc_cv_hashstyle)
1608 fi
1610 AC_CACHE_CHECK(for -fno-toplevel-reorder, libc_cv_fno_toplevel_reorder, [dnl
1611 cat > conftest.c <<EOF
1612 int foo;
1613 EOF
1614 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder
1615 conftest.c 1>&AS_MESSAGE_LOG_FD])
1616 then
1617 libc_cv_fno_toplevel_reorder=yes
1618 else
1619 libc_cv_fno_toplevel_reorder=no
1620 fi
1621 rm -f conftest*])
1622 if test $libc_cv_fno_toplevel_reorder = yes; then
1623 fno_unit_at_a_time=-fno-toplevel-reorder
1624 else
1625 fno_unit_at_a_time=-fno-unit-at-a-time
1626 fi
1627 AC_SUBST(fno_unit_at_a_time)
1629 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1630 cat > conftest.c <<EOF
1631 int foo;
1632 main () { return 0;}
1633 EOF
1634 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -fstack-protector
1635 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1636 then
1637 libc_cv_ssp=yes
1638 else
1639 libc_cv_ssp=no
1640 fi
1641 rm -f conftest*])
1642 AC_SUBST(libc_cv_ssp)
1644 if test $elf != yes; then
1645 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1646 [AC_TRY_COMPILE(, [asm (".section .init");
1647 asm (".section .fini");
1648 asm ("${libc_cv_dot_text}");],
1649 libc_cv_have_initfini=yes,
1650 libc_cv_have_initfini=no)])
1651 AC_SUBST(libc_cv_have_initfini)dnl
1652 if test $libc_cv_have_initfini = yes; then
1653 AC_DEFINE(HAVE_INITFINI)
1654 fi
1655 fi
1657 if test $elf = yes; then
1658 AC_CACHE_CHECK(whether cc puts quotes around section names,
1659 libc_cv_have_section_quotes,
1660 [cat > conftest.c <<EOF
1661 static const int foo
1662 __attribute__ ((section ("bar"))) = 1;
1663 EOF
1664 if ${CC-cc} -S conftest.c -o conftest.s; then
1665 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1666 libc_cv_have_section_quotes=yes
1667 else
1668 libc_cv_have_section_quotes=no
1669 fi
1670 else
1671 libc_cv_have_section_quotes=unknown
1672 fi
1673 rm -f conftest.[cs]
1674 ])
1675 if test $libc_cv_have_section_quotes = yes; then
1676 AC_DEFINE(HAVE_SECTION_QUOTES)
1677 fi
1678 fi
1680 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1681 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1682 [cat > conftest.$ac_ext <<EOF
1683 dnl This sometimes fails to find confdefs.h, for some reason.
1684 dnl [#]line $LINENO "[$]0"
1685 [#]line $LINENO "configure"
1686 #include "confdefs.h"
1687 void underscore_test(void) {
1688 return; }
1689 EOF
1690 if AC_TRY_EVAL(ac_compile); then
1691 if grep _underscore_test conftest* >/dev/null; then
1692 ifelse([$1], , :, [rm -f conftest*
1693 $1])
1694 else
1695 ifelse([$2], , , [rm -f conftest*
1696 $2])
1697 fi
1698 else
1699 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
1700 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
1701 ifelse([$2], , , [rm -f conftest*
1702 $2])
1703 fi
1704 rm -f conftest*])
1706 if test $elf = yes; then
1707 libc_cv_asm_underscores=no
1708 else
1709 if test $ac_cv_prog_cc_works = yes; then
1710 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1711 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1712 libc_cv_asm_underscores=yes,
1713 libc_cv_asm_underscores=no)])
1714 else
1715 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1716 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1717 libc_cv_asm_underscores=no)])
1718 fi
1719 fi
1720 if test $libc_cv_asm_underscores = no; then
1721 AC_DEFINE(NO_UNDERSCORES)
1722 fi
1724 if test $elf = yes; then
1725 libc_cv_weak_symbols=yes
1726 fi
1728 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1729 [dnl
1730 cat > conftest.s <<EOF
1731 ${libc_cv_dot_text}
1732 ${libc_cv_asm_global_directive} foo
1733 foo:
1734 .weak foo
1735 .weak bar; bar = foo
1736 EOF
1737 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1738 libc_cv_asm_weak_directive=yes
1739 else
1740 libc_cv_asm_weak_directive=no
1741 fi
1742 rm -f conftest*])
1744 if test $libc_cv_asm_weak_directive = no; then
1745 AC_CACHE_CHECK(for assembler .weakext directive,
1746 libc_cv_asm_weakext_directive,
1747 [dnl
1748 cat > conftest.s <<EOF
1749 ${libc_cv_dot_text}
1750 ${libc_cv_asm_global_directive} foo
1751 foo:
1752 .weakext bar foo
1753 .weakext baz
1754 ${libc_cv_asm_global_directive} baz
1755 baz:
1756 EOF
1757 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1758 libc_cv_asm_weakext_directive=yes
1759 else
1760 libc_cv_asm_weakext_directive=no
1761 fi
1762 rm -f conftest*])
1764 fi # no .weak
1766 if test $libc_cv_asm_weak_directive = yes; then
1767 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1768 elif test $libc_cv_asm_weakext_directive = yes; then
1769 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1770 fi
1772 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1773 case $machine in
1774 sparc/sparc64*) cfi_offset=2047;;
1775 *) cfi_offset=0;;
1776 esac
1777 cat > conftest.s <<EOF
1778 .text
1779 .type func,%function
1780 func:
1781 .cfi_startproc
1782 .cfi_remember_state
1783 .cfi_rel_offset 1, $cfi_offset
1784 .cfi_endproc
1785 EOF
1786 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1787 libc_cv_asm_cfi_directives=yes
1788 else
1789 libc_cv_asm_cfi_directives=no
1790 fi
1791 rm -f conftest*])
1792 if test $libc_cv_asm_cfi_directives = yes; then
1793 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1794 fi
1796 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1797 cat > conftest.c <<\EOF
1798 _start () {}
1799 int __eh_pc;
1800 __throw () {}
1801 EOF
1802 dnl No \ in command here because it ends up inside ''.
1803 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1804 -nostdlib -nostartfiles -Wl,--no-whole-archive
1805 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1806 libc_cv_ld_no_whole_archive=yes
1807 else
1808 libc_cv_ld_no_whole_archive=no
1809 fi
1810 rm -f conftest*])
1811 if test $libc_cv_ld_no_whole_archive = yes; then
1812 no_whole_archive=-Wl,--no-whole-archive
1813 fi
1814 AC_SUBST(no_whole_archive)dnl
1816 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1817 cat > conftest.c <<\EOF
1818 _start () {}
1819 int __eh_pc;
1820 __throw () {}
1821 EOF
1822 dnl No \ in command here because it ends up inside ''.
1823 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1824 -nostdlib -nostartfiles -fexceptions
1825 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1826 libc_cv_gcc_exceptions=yes
1827 else
1828 libc_cv_gcc_exceptions=no
1829 fi
1830 rm -f conftest*])
1831 if test $libc_cv_gcc_exceptions = yes; then
1832 exceptions=-fexceptions
1833 fi
1834 AC_SUBST(exceptions)dnl
1836 if test "$host_cpu" = powerpc ; then
1837 # Check for a bug present in at least versions 2.8.x of GCC
1838 # and versions 1.0.x of EGCS.
1839 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1840 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1841 libc_cv_c_asmcr0_bug='no',
1842 libc_cv_c_asmcr0_bug='yes')])
1843 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1844 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1845 fi
1846 fi
1848 dnl Check whether compiler understands __builtin_expect.
1849 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1850 [cat > conftest.c <<EOF
1851 #line $LINENO "configure"
1852 int foo (int a)
1853 {
1854 a = __builtin_expect (a, 10);
1855 return a == 10 ? 0 : 1;
1856 }
1857 EOF
1858 dnl No \ in command here because it ends up inside ''.
1859 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
1860 -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
1861 libc_cv_gcc_builtin_expect=yes
1862 else
1863 libc_cv_gcc_builtin_expect=no
1864 fi
1865 rm -f conftest*])
1866 if test "$libc_cv_gcc_builtin_expect" = yes; then
1867 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1868 fi
1870 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1871 cat > conftest.c <<\EOF
1872 void zero (void *x)
1873 {
1874 __builtin_memset (x, 0, 1000);
1875 }
1876 EOF
1877 dnl
1878 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1879 then
1880 libc_cv_gcc_builtin_memset=no
1881 else
1882 libc_cv_gcc_builtin_memset=yes
1883 fi
1884 rm -f conftest* ])
1885 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1886 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1887 fi
1889 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1890 cat > conftest.c <<\EOF
1891 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1892 char *foo (const char *a, const char *b)
1893 {
1894 return __builtin_strstr (a, b);
1895 }
1896 EOF
1897 dnl
1898 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1899 then
1900 libc_cv_gcc_builtin_redirection=yes
1901 else
1902 libc_cv_gcc_builtin_redirection=no
1903 fi
1904 rm -f conftest* ])
1905 if test "$libc_cv_gcc_builtin_redirection" = yes ; then
1906 AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
1907 fi
1909 dnl Check whether the compiler supports the __thread keyword.
1910 if test "x$use__thread" != xno; then
1911 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1912 [cat > conftest.c <<\EOF
1913 __thread int a = 42;
1914 EOF
1915 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1916 libc_cv_gcc___thread=yes
1917 else
1918 libc_cv_gcc___thread=no
1919 fi
1920 rm -f conftest*])
1921 if test "$libc_cv_gcc___thread" = yes; then
1922 AC_DEFINE(HAVE___THREAD)
1923 fi
1924 else
1925 libc_cv_gcc___thread=no
1926 fi
1928 if test "$libc_cv_gcc___thread" = yes; then
1929 dnl Check whether the compiler supports the tls_model attribute.
1930 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1931 cat > conftest.c <<\EOF
1932 extern __thread int a __attribute__((tls_model ("initial-exec")));
1933 EOF
1934 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
1935 libc_cv_gcc_tls_model_attr=yes
1936 else
1937 libc_cv_gcc_tls_model_attr=no
1938 fi
1939 rm -f conftest*])
1940 if test "$libc_cv_gcc_tls_model_attr" = yes; then
1941 AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
1942 fi
1943 fi
1945 dnl Check whether we have the gd library available.
1946 AC_MSG_CHECKING(for libgd)
1947 if test "$with_gd" != "no"; then
1948 old_CFLAGS="$CFLAGS"
1949 CFLAGS="$CFLAGS $libgd_include"
1950 old_LDFLAGS="$LDFLAGS"
1951 LDFLAGS="$LDFLAGS $libgd_ldflags"
1952 old_LIBS="$LIBS"
1953 LIBS="$LIBS -lgd -lpng -lz -lm"
1954 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1955 CFLAGS="$old_CFLAGS"
1956 LDFLAGS="$old_LDFLAGS"
1957 LIBS="$old_LIBS"
1958 else
1959 LIBGD=no
1960 fi
1961 AC_MSG_RESULT($LIBGD)
1962 AC_SUBST(LIBGD)
1964 # SELinux detection
1965 if test x$with_selinux = xno ; then
1966 have_selinux=no;
1967 else
1968 # See if we have the SELinux library
1969 AC_CHECK_LIB(selinux, is_selinux_enabled,
1970 have_selinux=yes, have_selinux=no)
1971 # See if we have the SELinux header with the NSCD permissions in it.
1972 if test x$have_selinux = xyes ; then
1973 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
1974 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
1975 [#ifdef NSCD__SHMEMHOST
1976 return 0;
1977 #else
1978 #error NSCD__SHMEMHOST not defined
1979 #endif],
1980 have_selinux=yes, have_selinux=no)
1981 AC_MSG_RESULT($have_selinux)
1982 fi
1984 if test x$with_selinux = xyes ; then
1985 if test x$have_selinux = xno ; then
1986 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
1987 fi
1988 fi
1989 fi
1990 # Check if we're building with SELinux support.
1991 if test "x$have_selinux" = xyes; then
1992 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
1994 # See if we have the libaudit library
1995 AC_CHECK_LIB(audit, audit_log_user_avc_message,
1996 have_libaudit=yes, have_libaudit=no)
1997 if test "x$have_libaudit" = xyes; then
1998 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
1999 fi
2000 AC_SUBST(have_libaudit)
2002 # See if we have the libcap library
2003 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2004 if test "x$have_libcap" = xyes; then
2005 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2006 fi
2007 AC_SUBST(have_libcap)
2008 fi
2009 AC_SUBST(have_selinux)
2011 dnl check for the size of 'long double'.
2012 AC_CHECK_SIZEOF(long double, 0)
2013 sizeof_long_double=$ac_cv_sizeof_long_double
2014 AC_SUBST(sizeof_long_double)
2016 ### End of automated tests.
2017 ### Now run sysdeps configure fragments.
2019 # They also can set these variables.
2020 use_ldconfig=no
2021 ldd_rewrite_script=no
2022 libc_cv_sysconfdir=$sysconfdir
2023 libc_cv_gcc_unwind_find_fde=no
2024 libc_cv_idn=no
2026 # Iterate over all the sysdep directories we will use, running their
2027 # configure fragments, and looking for a uname implementation.
2028 uname=
2029 for dir in $sysnames; do
2030 case $dir in
2031 /*) dest=$dir ;;
2032 *) dest=$srcdir/$dir ;;
2033 esac
2034 if test -r $dest/configure; then
2035 AC_MSG_RESULT(running configure fragment for $dir)
2036 . $dest/configure
2037 fi
2038 [
2039 if test -z "$uname"; then
2040 if test -r $dest/uname.c ||
2041 test -r $dest/uname.S ||
2042 { test -r $dest/syscalls.list &&
2043 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
2044 uname=$dir
2045 fi
2046 fi
2047 ]dnl
2048 done
2050 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2051 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2052 fi
2053 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2055 # If we will use the generic uname implementation, we must figure out what
2056 # it will say by examining the system, and write the results in config-name.h.
2057 if test "$uname" = "sysdeps/generic"; then
2059 changequote(,)dnl
2060 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
2061 changequote([,])dnl
2062 if test $uname_sysname != $config_os; then
2063 config_release=`echo $config_os | sed s/$uname_sysname//`
2064 fi
2065 dnl
2066 AC_DEFUN(LIBC_KERNEL_ID, [dnl
2067 if test -r /vmunix; then
2068 kernel_id=`strings /vmunix | grep UNIX`
2069 elif test -r /dynix; then
2070 kernel_id=`strings /dynix | grep DYNIX`
2071 else
2072 kernel_id=
2073 fi
2074 ])dnl
2076 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
2077 LIBC_KERNEL_ID
2078 changequote(,)dnl
2079 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
2080 changequote([,])dnl
2081 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
2082 != x$config_release; then
2083 # The configuration release is a substring of the kernel release.
2084 libc_cv_uname_release=$kernel_release
2085 elif test x$config_release != x; then
2086 libc_cv_uname_release=$config_release
2087 elif test x$kernel_release != x; then
2088 libc_cv_uname_release=$kernel_release
2089 else
2090 libc_cv_uname_release=unknown
2091 fi])
2092 uname_release="$libc_cv_uname_release"
2094 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
2095 LIBC_KERNEL_ID
2096 changequote(,)dnl
2097 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
2098 changequote([,])dnl
2099 if test -n "$kernel_version"; then
2100 libc_cv_uname_version="$kernel_version"
2101 else
2102 libc_cv_uname_version=unknown
2103 fi])
2104 uname_version="$libc_cv_uname_version"
2106 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
2107 config_uname=config-name.h:config-name.in
2108 else
2109 # For non-generic uname, we don't need to create config-name.h at all.
2110 config_uname=
2111 fi
2113 dnl This is tested by existing code and it's simpler to avoid changing it.
2114 AC_DEFINE(USE_IN_LIBIO)
2116 # Test for old glibc 2.0.x headers so that they can be removed properly
2117 # Search only in includedir.
2118 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2119 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2120 then
2121 old_glibc_headers=yes
2122 else
2123 old_glibc_headers=no
2124 fi
2125 AC_MSG_RESULT($old_glibc_headers)
2126 if test ${old_glibc_headers} = yes; then
2127 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2128 AC_MSG_WARN(*** be removed.)
2129 fi
2130 AC_SUBST(old_glibc_headers)
2132 AC_SUBST(libc_cv_slibdir)
2133 AC_SUBST(libc_cv_localedir)
2134 AC_SUBST(libc_cv_sysconfdir)
2135 AC_SUBST(libc_cv_rootsbindir)
2136 AC_SUBST(libc_cv_forced_unwind)
2138 AC_SUBST(use_ldconfig)
2139 AC_SUBST(ldd_rewrite_script)
2141 AC_SUBST(elf) AC_SUBST(xcoff)
2142 if test $elf = yes; then
2143 AC_DEFINE(HAVE_ELF)
2144 fi
2145 if test $xcoff = yes; then
2146 AC_DEFINE(HAVE_XCOFF)
2147 fi
2149 AC_SUBST(static)
2150 AC_SUBST(shared)
2151 if test $shared = default; then
2152 shared=$elf
2153 fi
2155 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
2156 [pic_default=yes
2157 cat > conftest.c <<EOF
2158 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2159 # error PIC is default.
2160 #endif
2161 EOF
2162 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2163 pic_default=no
2164 fi
2165 rm -f conftest.*])
2166 AC_SUBST(pic_default)
2168 AC_SUBST(profile)
2169 AC_SUBST(omitfp)
2170 AC_SUBST(bounded)
2171 AC_SUBST(static_nss)
2172 AC_SUBST(nopic_initfini)
2174 AC_SUBST(DEFINES)
2176 dnl See sysdeps/mach/configure.in for this variable.
2177 AC_SUBST(mach_interface_list)
2179 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2180 config_makefile=
2181 else
2182 config_makefile=Makefile
2183 fi
2185 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2186 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2187 AC_SUBST(VERSION)
2188 AC_SUBST(RELEASE)
2190 AC_CONFIG_FILES([config.make ${config_makefile} ${config_uname}])
2191 AC_CONFIG_COMMANDS([default],[[
2192 case $CONFIG_FILES in *config.make*)
2193 echo "$config_vars" >> config.make;;
2194 esac
2195 test -d bits || mkdir bits]],[[config_vars='$config_vars']])
2196 AC_OUTPUT