| blob | ee9e3d8eb449fb22026ede3b42fdb540c2c5c9d9 |
1 dnl Process this file with autoconf to produce a configure script.
2 AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required.
3 AC_INIT([GNU C Library], [(see version.h)], [http://sourceware.org/bugzilla/], [glibc])
4 AC_CONFIG_SRCDIR([include/features.h])
5 AC_CONFIG_HEADERS([config.h])
6 AC_CONFIG_AUX_DIR([scripts])
8 dnl This is here so we can set $subdirs directly based on configure fragments.
9 AC_CONFIG_SUBDIRS()
11 AC_CANONICAL_HOST
13 AC_PROG_CC
14 if test $host != $build; then
15 AC_CHECK_PROGS(BUILD_CC, gcc cc)
16 fi
17 AC_SUBST(cross_compiling)
18 AC_PROG_CPP
19 # We need the C++ compiler only for testing.
20 AC_PROG_CXX
22 if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
23 AC_MSG_ERROR([you must configure in a separate build directory])
24 fi
26 # This will get text that should go into config.make.
27 config_vars=
29 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
30 AC_ARG_WITH([gd],
31 AC_HELP_STRING([--with-gd=DIR],
32 [find libgd include dir and library with prefix DIR]),
33 [dnl
34 case "$with_gd" in
35 yes|''|no) ;;
36 *) libgd_include="-I$withval/include"
37 libgd_ldflags="-L$withval/lib" ;;
38 esac
39 ])
40 AC_ARG_WITH([gd-include],
41 AC_HELP_STRING([--with-gd-include=DIR],
42 [find libgd include files in DIR]),
43 [dnl
44 case "$with_gd_include" in
45 ''|no) ;;
46 *) libgd_include="-I$withval" ;;
47 esac
48 ])
49 AC_ARG_WITH([gd-lib],
50 AC_HELP_STRING([--with-gd-lib=DIR],
51 [find libgd library files in DIR]),
52 [dnl
53 case "$with_gd_lib" in
54 ''|no) ;;
55 *) libgd_ldflags="-L$withval" ;;
56 esac
57 ])
59 if test -n "$libgd_include"; then
60 config_vars="$config_vars
61 CFLAGS-memusagestat.c = $libgd_include"
62 fi
63 if test -n "$libgd_ldflags"; then
64 config_vars="$config_vars
65 libgd-LDFLAGS = $libgd_ldflags"
66 fi
68 dnl Arguments to specify presence of other packages/features.
69 AC_ARG_WITH([fp],
70 AC_HELP_STRING([--with-fp],
71 [if using floating-point hardware @<:@default=yes@:>@]),
72 [with_fp=$withval],
73 [with_fp=yes])
74 AC_SUBST(with_fp)
75 AC_ARG_WITH([binutils],
76 AC_HELP_STRING([--with-binutils=PATH],
77 [specify location of binutils (as and ld)]),
78 [path_binutils=$withval],
79 [path_binutils=''])
80 AC_ARG_WITH([selinux],
81 AC_HELP_STRING([--with-selinux],
82 [if building with SELinux support]),
83 [with_selinux=$withval],
84 [with_selinux=auto])
86 AC_ARG_WITH([headers],
87 AC_HELP_STRING([--with-headers=PATH],
88 [location of system headers to use
89 (for example /usr/src/linux/include)
90 @<:@default=compiler default@:>@]),
91 [sysheaders=$withval],
92 [sysheaders=''])
94 AC_SUBST(use_default_link)
95 AC_ARG_WITH([default-link],
96 AC_HELP_STRING([--with-default-link],
97 [do not use explicit linker scripts]),
98 [use_default_link=$withval],
99 [use_default_link=default])
101 AC_ARG_ENABLE([sanity-checks],
102 AC_HELP_STRING([--disable-sanity-checks],
103 [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
104 [enable_sanity=$enableval],
105 [enable_sanity=yes])
107 AC_SUBST(enable_check_abi)
108 AC_ARG_ENABLE([check-abi],
109 AC_HELP_STRING([--enable-check-abi],
110 [do "make check-abi" in "make check" (no/warn/yes)
111 @<:@default=no@:>@]),
112 [enable_check_abi=$enableval],
113 [enable_check_abi=no])
115 AC_ARG_ENABLE([shared],
116 AC_HELP_STRING([--enable-shared],
117 [build shared library @<:@default=yes if GNU ld@:>@]),
118 [shared=$enableval],
119 [shared=yes])
120 AC_ARG_ENABLE([profile],
121 AC_HELP_STRING([--enable-profile],
122 [build profiled library @<:@default=no@:>@]),
123 [profile=$enableval],
124 [profile=no])
125 AC_ARG_ENABLE([versioning],
126 AC_HELP_STRING([--disable-versioning],
127 [do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
128 [enable_versioning=$enableval],
129 [enable_versioning=yes])
131 AC_ARG_ENABLE([oldest-abi],
132 AC_HELP_STRING([--enable-oldest-abi=ABI],
133 [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
134 [oldest_abi=$enableval],
135 [oldest_abi=no])
136 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
137 oldest_abi=default
138 else
139 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
140 fi
141 AC_SUBST(oldest_abi)
143 AC_ARG_ENABLE([stackguard-randomization],
144 AC_HELP_STRING([--enable-stackguard-randomization],
145 [initialize __stack_chk_guard canary with a random number at program start]),
146 [enable_stackguard_randomize=$enableval],
147 [enable_stackguard_randomize=no])
148 if test "$enable_stackguard_randomize" = yes; then
149 AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
150 fi
152 dnl Generic infrastructure for drop-in additions to libc.
153 AC_ARG_ENABLE([add-ons],
154 AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
155 [configure and build add-ons in DIR1,DIR2,...
156 search for add-ons if no parameter given]),
157 , [enable_add_ons=yes])
159 AC_ARG_ENABLE([hidden-plt],
160 AC_HELP_STRING([--disable-hidden-plt],
161 [do not hide internal function calls to avoid PLT]),
162 [hidden=$enableval],
163 [hidden=yes])
164 if test "x$hidden" = xno; then
165 AC_DEFINE(NO_HIDDEN)
166 fi
168 AC_ARG_ENABLE([bind-now],
169 AC_HELP_STRING([--enable-bind-now],
170 [disable lazy relocations in DSOs]),
171 [bindnow=$enableval],
172 [bindnow=no])
173 AC_SUBST(bindnow)
175 dnl On some platforms we cannot use dynamic loading. We must provide
176 dnl static NSS modules.
177 AC_ARG_ENABLE([static-nss],
178 AC_HELP_STRING([--enable-static-nss],
179 [build static NSS modules @<:@default=no@:>@]),
180 [static_nss=$enableval],
181 [static_nss=no])
182 dnl Enable static NSS also if we build no shared objects.
183 if test x"$static_nss" = xyes || test x"$shared" = xno; then
184 static_nss=yes
185 AC_DEFINE(DO_STATIC_NSS)
186 fi
188 AC_ARG_ENABLE([force-install],
189 AC_HELP_STRING([--disable-force-install],
190 [don't force installation of files from this package, even if they are older than the installed files]),
191 [force_install=$enableval],
192 [force_install=yes])
193 AC_SUBST(force_install)
195 dnl On some platforms we allow dropping compatibility with all kernel
196 dnl versions.
197 AC_ARG_ENABLE([kernel],
198 AC_HELP_STRING([--enable-kernel=VERSION],
199 [compile for compatibility with kernel not older than VERSION]),
200 [minimum_kernel=$enableval],
201 [])
202 dnl Prevent unreasonable values.
203 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
204 # Better nothing than this.
205 minimum_kernel=""
206 else
207 if test "$minimum_kernel" = current; then
208 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
209 fi
210 fi
212 dnl For the development we sometimes want gcc to issue even more warnings.
213 dnl This is not the default since many of the extra warnings are not
214 dnl appropriate.
215 AC_ARG_ENABLE([all-warnings],
216 AC_HELP_STRING([--enable-all-warnings],
217 [enable all useful warnings gcc can issue]),
218 [all_warnings=$enableval],
219 [])
220 AC_SUBST(all_warnings)
222 AC_ARG_ENABLE([multi-arch],
223 AC_HELP_STRING([--enable-multi-arch],
224 [enable single DSO with optimizations for multiple architectures]),
225 [multi_arch=$enableval],
226 [multi_arch=default])
228 AC_ARG_ENABLE([nss-crypt],
229 AC_HELP_STRING([--enable-nss-crypt],
230 [enable libcrypt to use nss]),
231 [nss_crypt=$enableval],
232 [nss_crypt=no])
233 if test x$nss_crypt = xyes; then
234 nss_includes=-I$(nss-config --includedir 2>/dev/null)
235 if test $? -ne 0; then
236 AC_MSG_ERROR([cannot find include directory with nss-config])
237 fi
238 old_CFLAGS="$CFLAGS"
239 CFLAGS="$CFLAGS $nss_includes"
240 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
241 #include <hasht.h>
242 #include <nsslowhash.h>
243 void f (void) { NSSLOW_Init (); }])],
244 libc_cv_nss_crypt=yes,
245 AC_MSG_ERROR([
246 cannot find NSS headers with lowlevel hash function interfaces]))
247 old_LIBS="$LIBS"
248 LIBS="$LIBS -lfreebl3"
249 AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
250 #include <hasht.h>
251 #include <nsslowhash.h>],
252 [NSSLOW_Init();])],
253 libc_cv_nss_crypt=yes,
254 AC_MSG_ERROR([
255 cannot link program using lowlevel NSS hash functions]))
256 CFLAGS="$old_CFLAGS"
257 LIBS="$old_LIBS"
258 else
259 libc_cv_nss_crypt=no
260 fi
261 AC_SUBST(libc_cv_nss_crypt)
263 # The way shlib-versions is used to generate soversions.mk uses a
264 # fairly simplistic model for name recognition that can't distinguish
265 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
266 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
267 # tell. This doesn't get used much beyond that, so it's fairly safe.
268 case "$host_os" in
269 linux*)
270 ;;
271 gnu*)
272 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
273 ;;
274 esac
276 # We keep the original values in `$config_*' and never modify them, so we
277 # can write them unchanged into config.make. Everything else uses
278 # $machine, $vendor, and $os, and changes them whenever convenient.
279 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
281 # Don't allow vendor == "unknown"
282 test "$config_vendor" = unknown && config_vendor=
283 config_os="`echo $config_os | sed 's/^unknown-//'`"
285 # Some configurations imply other options.
286 elf=yes
288 # The configure fragment of an add-on port can modify these to supplement
289 # or override the table in the case statement below. No fragment should
290 # ever change the config_* variables, however.
291 machine=$config_machine
292 vendor=$config_vendor
293 os=$config_os
294 base_os=''
296 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
297 # Unify this here.
298 if test "$machine" = rs6000; then
299 machine="powerpc"
300 fi
302 # Braindead PowerPC box with absolutely no FPU.
303 case "$machine-$host_os" in
304 powerpc*-*soft)
305 with_fp=no
306 ;;
307 esac
309 submachine=
310 AC_ARG_WITH([cpu],
311 AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
312 [dnl
313 case "$withval" in
314 yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
315 no) ;;
316 *) submachine="$withval" ;;
317 esac
318 ])
320 # An add-on can set this when it wants to disable the sanity check below.
321 libc_config_ok=no
323 dnl Having this here, though empty, makes sure that if add-ons' fragments
324 dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
325 dnl our AC_OUTPUT will actually use it.
326 AC_CONFIG_SUBDIRS()
328 case "$enable_add_ons" in
329 ''|no) add_ons= ;;
330 yes|'*')
331 add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
332 sed 's@/[[^/]]*$@@' | sort | uniq`
333 add_ons_automatic=yes
334 ;;
335 *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
336 add_ons_automatic=no ;;
337 esac
339 configured_add_ons=
340 add_ons_sfx=
341 add_ons_pfx=
342 if test x"$add_ons" != x; then
343 for f in $add_ons; do
344 # Some sanity checks
345 case "$f" in
346 crypt)
347 AC_MSG_ERROR([
348 *** It seems that you're using an old \`crypt' add-on. crypt is now
349 *** part of glibc and using the old add-on will not work with this
350 *** release. Start again with fresh sources and without the old
351 *** \`crypt' add-on.])
352 ;;
353 localedata)
354 AC_MSG_ERROR([
355 *** It seems that you're using an old \`localedata' add-on. localedata
356 *** is now part of glibc and using the old add-on will not work with
357 *** this release. Start again with fresh sources and without the old
358 *** \`localedata' add-on.])
359 ;;
360 esac
361 done
363 # Now source each add-on's configure fragment.
364 # The fragments can use $srcdir/$libc_add_on to find themselves,
365 # and test $add_ons_automatic to see if they were explicitly requested.
366 # A fragment can clear (or even change) $libc_add_on to affect
367 # whether it goes into the list to be actually used in the build.
368 use_add_ons=
369 for libc_add_on in $add_ons; do
370 # Test whether such a directory really exists.
371 # It can be absolute, or relative to $srcdir, or relative to the build dir.
372 case "$libc_add_on" in
373 /*)
374 libc_add_on_srcdir=$libc_add_on
375 ;;
376 *)
377 test -d "$srcdir/$libc_add_on" || {
378 if test -d "$libc_add_on"; then
379 libc_add_on="`pwd`/$libc_add_on"
380 else
381 AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
382 fi
383 }
384 libc_add_on_srcdir=$srcdir/$libc_add_on
385 ;;
386 esac
388 libc_add_on_frag=$libc_add_on_srcdir/configure
389 libc_add_on_canonical=
390 libc_add_on_config_subdirs=
391 if test -r "$libc_add_on_frag"; then
392 AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
393 libc_add_on_canonical=unknown
394 libc_add_on_subdirs=
395 . "$libc_add_on_frag"
396 test -z "$libc_add_on" || {
397 configured_add_ons="$configured_add_ons $libc_add_on"
398 if test "x$libc_add_on_canonical" = xunknown; then
399 AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
400 fi
401 for d in $libc_add_on_subdirs; do
402 case "$libc_add_on" in
403 /*) subdir_srcdir="$libc_add_on" ;;
404 *) subdir_srcdir="\$(..)$libc_add_on" ;;
405 esac
406 case "$d" in
407 .)
408 d="${libc_add_on_canonical:-$libc_add_on}"
409 ;;
410 /*)
411 subdir_srcdir="$d"
412 ;;
413 *)
414 subdir_srcdir="$subdir_srcdir/$d"
415 ;;
416 esac
417 d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
418 add_on_subdirs="$add_on_subdirs $d"
419 test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
420 $d-srcdir = $subdir_srcdir"
421 done
422 for d in $libc_add_on_config_subdirs; do
423 case "$d" in
424 /*) AC_MSG_ERROR(dnl
425 fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
426 esac
427 if test ! -d "$libc_add_on_srcdir/$d"; then
428 AC_MSG_ERROR(fragment wants to configure missing directory $d)
429 fi
430 case "$libc_add_on" in
431 /*) AC_MSG_ERROR(dnl
432 relative path required for add-on using \$libc_add_on_config_subdirs) ;;
433 esac
434 subdirs="$subdirs $libc_add_on/$d"
435 done
436 }
437 fi
438 if test -n "$libc_add_on"; then
439 if frags=`ls -d $libc_add_on_srcdir/sysdeps/*/preconfigure 2> /dev/null`
440 then
441 AC_MSG_CHECKING(add-on $libc_add_on for preconfigure fragments)
442 for frag in $frags; do
443 name=`echo "$frag" | sed 's@/[[^/]]*$@@;s@^.*/@@'`
444 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
445 . "$frag"
446 done
447 AC_MSG_RESULT()
448 fi
449 use_add_ons="$use_add_ons $libc_add_on"
450 add_ons_pfx="$add_ons_pfx $libc_add_on/"
451 test -z "$libc_add_on_canonical" ||
452 add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
453 fi
454 done
455 # Use echo to strip excess whitespace.
456 add_ons="`echo $use_add_ons`"
457 fi
458 AC_SUBST(add_ons)
459 AC_SUBST(add_on_subdirs)
462 ###
463 ### I put this here to prevent those annoying emails from people who cannot
464 ### read and try to compile glibc on unsupported platforms. --drepper
465 ###
466 ### By using the undocumented --enable-hacker-mode option for configure
467 ### one can skip this test to make the configuration not fail for unsupported
468 ### platforms.
469 ###
470 if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
471 case "$machine-$host_os" in
472 *-linux* | *-gnu* | arm*-none*)
473 ;;
474 *)
475 echo "*** The GNU C library is currently not available for this platform."
476 echo "*** So far nobody cared to port it and if there is no volunteer it"
477 echo "*** might never happen. So, if you have interest to see glibc on"
478 echo "*** this platform visit"
479 echo "*** http://www.gnu.org/software/libc/porting.html"
480 echo "*** and join the group of porters"
481 exit 1
482 ;;
483 esac
484 fi
486 dnl We need to use [ and ] for other purposes for a while now.
487 changequote(,)dnl
488 # Expand the configuration machine name into a subdirectory by architecture
489 # type and particular chip. If an add-on configure fragment already set
490 # base_machine, we don't change it.
491 test -n "$base_machine" || case "$machine" in
492 i[34567]86) base_machine=i386 machine=i386/$machine ;;
493 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
494 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
495 s390) base_machine=s390 machine=s390/s390-32 ;;
496 s390x) base_machine=s390 machine=s390/s390-64 ;;
497 sh3*) base_machine=sh machine=sh/sh3 ;;
498 sh4*) base_machine=sh machine=sh/sh4 ;;
499 sparc | sparcv[67])
500 base_machine=sparc machine=sparc/sparc32 ;;
501 sparcv8 | supersparc | hypersparc)
502 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
503 sparcv8plus | sparcv8plusa | sparcv9)
504 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
505 sparcv8plusb | sparcv9b)
506 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
507 sparcv9v)
508 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
509 sparcv9v2)
510 base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
511 sparc64)
512 base_machine=sparc machine=sparc/sparc64 ;;
513 sparc64b)
514 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
515 sparc64v)
516 base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
517 sparc64v2)
518 base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
519 *) base_machine=$machine ;;
520 esac
521 changequote([,])dnl
522 AC_SUBST(base_machine)
524 if test "$base_machine" = "i386"; then
525 AC_DEFINE(USE_REGPARMS)
526 fi
528 # For the multi-arch option we need support in the assembler.
529 AC_CACHE_CHECK([for assembler gnu_indirect_function symbol type support],
530 libc_cv_asm_gnu_indirect_function, [dnl
531 cat > conftest.s <<EOF
532 .type foo,%gnu_indirect_function
533 EOF
534 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD;
535 then
536 libc_cv_asm_gnu_indirect_function=yes
537 else
538 libc_cv_asm_gnu_indirect_function=no
539 fi
540 rm -f conftest*])
542 AC_MSG_CHECKING(whether .text pseudo-op must be used)
543 AC_CACHE_VAL(libc_cv_dot_text, [dnl
544 cat > conftest.s <<EOF
545 .text
546 EOF
547 libc_cv_dot_text=
548 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
549 libc_cv_dot_text=.text
550 fi
551 rm -f conftest*])
552 if test -z "$libc_cv_dot_text"; then
553 AC_MSG_RESULT(no)
554 else
555 AC_MSG_RESULT(yes)
556 fi
558 AC_CACHE_CHECK(for assembler global-symbol directive,
559 libc_cv_asm_global_directive, [dnl
560 libc_cv_asm_global_directive=UNKNOWN
561 for ac_globl in .globl .global .EXPORT; do
562 cat > conftest.s <<EOF
563 ${libc_cv_dot_text}
564 ${ac_globl} foo
565 foo:
566 EOF
567 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
568 libc_cv_asm_global_directive=${ac_globl}
569 fi
570 rm -f conftest*
571 test $libc_cv_asm_global_directive != UNKNOWN && break
572 done])
573 if test $libc_cv_asm_global_directive = UNKNOWN; then
574 AC_MSG_ERROR(cannot determine asm global directive)
575 else
576 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
577 fi
579 AC_CACHE_CHECK(for assembler .type directive prefix,
580 libc_cv_asm_type_prefix, [dnl
581 libc_cv_asm_type_prefix=no
582 for ac_try_prefix in '@' '%' '#'; do
583 cat > conftest.s <<EOF
584 ${libc_cv_dot_text}
585 ${libc_cv_asm_global_directive} foo
586 .type foo, ${ac_try_prefix}object
587 .size foo, 1
588 foo:
589 .byte 1
590 EOF
591 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
592 libc_cv_asm_type_prefix=${ac_try_prefix}
593 fi
594 rm -f conftest*
595 test "x$libc_cv_asm_type_prefix" != xno && break
596 done])
597 if test "x$libc_cv_asm_type_prefix" != xno; then
598 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
599 fi
601 if test x"$libc_cv_asm_gnu_indirect_function" != xyes -o x"$libc_cv_asm_type_prefix" = xno; then
602 if test x"$multi_arch" = xyes; then
603 AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
604 else
605 multi_arch=no
606 fi
607 fi
608 if test x"$multi_arch" != xno; then
609 multi_arch_d=/multiarch
610 fi
612 # Compute the list of sysdep directories for this configuration.
613 # This can take a while to compute.
614 sysdep_dir=$srcdir/sysdeps
615 AC_MSG_CHECKING(sysdep dirs)
616 dnl We need to use [ and ] for other purposes for a while now.
617 changequote(,)dnl
618 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
619 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
621 test "x$base_os" != x || case "$os" in
622 gnu*)
623 base_os=mach/hurd ;;
624 netbsd* | 386bsd* | freebsd* | bsdi*)
625 base_os=unix/bsd/bsd4.4 ;;
626 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
627 base_os=unix/bsd ;;
628 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
629 base_os=unix/sysv ;;
630 irix6*)
631 base_os=unix/sysv/irix6/$os ;;
632 solaris[2-9]*)
633 base_os=unix/sysv/sysv4 ;;
634 none)
635 base_os=standalone ;;
636 esac
638 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
639 tail=$os
640 ostry=$os
641 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
642 ostry="$ostry /$o"
643 tail=$o
644 done
645 o=`echo $tail | sed 's/[0-9]*$//'`
646 if test $o != $tail; then
647 ostry="$ostry /$o"
648 fi
649 # For linux-gnu, try linux-gnu, then linux.
650 o=`echo $tail | sed 's/-.*$//'`
651 if test $o != $tail; then
652 ostry="$ostry /$o"
653 fi
655 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
656 base=
657 tail=$base_os
658 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
659 set $b
660 base="$base /$1"
661 tail="$2"
662 done
664 # For sparc/sparc32, try sparc/sparc32 and then sparc.
665 mach=
666 tail=$machine${submachine:+/$submachine}
667 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
668 set $m
669 # Prepend the machine's FPU directory unless --without-fp.
670 if test "$with_fp" = yes; then
671 mach="$mach /$1/fpu"
672 else
673 mach="$mach /$1/nofpu"
674 fi
675 mach="$mach /$1"
676 tail="$2"
677 done
679 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
680 changequote([,])dnl
682 # Find what sysdep directories exist.
683 sysnames_add_ons=
684 sysnames=
685 for b in $base ''; do
686 for m0 in $mach ''; do
687 for v in /$vendor ''; do
688 test "$v" = / && continue
689 for o in /$ostry ''; do
690 test "$o" = / && continue
691 for m in $multi_arch_d $mach ''; do
692 for d in $add_ons_pfx ''; do
693 for a in $add_ons_sfx ''; do
694 if test -n "$m0$m0sub$b$v$o$m$msub"; then
695 try_srcdir="${srcdir}/"
696 case "$d" in
697 /*) try_srcdir= ;;
698 esac
699 try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
700 test -n "$enable_debug_configure" &&
701 echo "$0 [DEBUG]: try $try" >&2
702 if test -d "$try_srcdir$try"; then
703 sysnames="$sysnames $try"
704 { test -n "$o" || test -n "$b"; } && os_used=t
705 { test -n "$m" || test -n "$m0"; } && machine_used=t
706 case x${m0:-$m} in
707 x*/$submachine) submachine_used=t ;;
708 esac
709 if test -n "$d"; then
710 case "$sysnames_add_ons" in
711 *" $d "*) ;;
712 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
713 esac
714 fi
715 fi
716 fi
717 done
718 done
719 done
720 done
721 done
722 done
723 done
725 # If the assembler supports gnu_indirect_function symbol type and the
726 # architecture supports multi-arch, we enable multi-arch by default.
727 case $sysnames_add_ons$sysnames in
728 *"$multi_arch_d"*)
729 ;;
730 *)
731 test x"$multi_arch" = xdefault && multi_arch=no
732 ;;
733 esac
734 if test x"$multi_arch" != xno; then
735 AC_DEFINE(USE_MULTIARCH)
736 fi
737 AC_SUBST(multi_arch)
739 if test -z "$os_used" && test "$os" != none; then
740 AC_MSG_ERROR(Operating system $os is not supported.)
741 fi
742 if test -z "$machine_used" && test "$machine" != none; then
743 AC_MSG_ERROR(The $machine is not supported.)
744 fi
745 if test -z "$submachine_used" && test -n "$submachine"; then
746 AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
747 fi
748 AC_SUBST(submachine)
750 # We have now validated the configuration.
753 # Look for an `elf' subdirectory of each machine directory.
754 # We prepend these rather than inserting them whereever the machine appears
755 # because things specified by the machine's ELF ABI should override
756 # OS-specific things, and should always be the same for any OS on the
757 # machine (otherwise what's the point of an ABI?).
758 elf_dirs=
759 for d in $add_ons_pfx ''; do
760 for m in $mach; do
761 if test -d $srcdir/${d}sysdeps$m/elf; then
762 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
763 fi
764 done
765 done
766 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
769 # Expand the list of system names into a full list of directories
770 # from each element's parent name and Implies file (if present).
771 set $sysnames
772 names=
773 while test $# -gt 0; do
774 name=$1
775 shift
777 case " $names " in *" $name "*)
778 # Already in the list.
779 continue
780 esac
782 # Report each name as we discover it, so there is no long pause in output.
783 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
785 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
787 case $name in
788 /*) xsrcdir= ;;
789 *) xsrcdir=$srcdir/ ;;
790 esac
791 test -n "$enable_debug_configure" &&
792 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
794 if test -f $xsrcdir$name/Implies; then
795 # Collect more names from the `Implies' file (removing comments).
796 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
797 implied=
798 for x in $implied_candidate; do
799 found=no
800 if test -d $xsrcdir$name_base/$x; then
801 implied="$implied $name_base/$x";
802 found=yes
803 fi
804 for d in $add_ons_pfx ''; do
805 try="${d}sysdeps/$x"
806 case $d in
807 /*) try_srcdir= ;;
808 *) try_srcdir=$srcdir/ ;;
809 esac
810 test -n "$enable_debug_configure" &&
811 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
812 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
813 then
814 implied="$implied $try"
815 found=yes
816 case "$sysnames_add_ons" in
817 *" $d "*) ;;
818 *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
819 esac
820 fi
821 done
822 if test $found = no; then
823 AC_MSG_WARN($name/Implies specifies nonexistent $x)
824 fi
825 done
826 else
827 implied=
828 fi
830 # Add NAME to the list of names.
831 names="$names $name"
833 # Find the parent of NAME, using the empty string if it has none.
834 changequote(,)dnl
835 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
836 changequote([,])dnl
838 # Add the names implied by NAME, and NAME's parent (if it has one), to
839 # the list of names to be processed (the argument list). We prepend the
840 # implied names to the list and append the parent. We want implied
841 # directories to come before further directories inferred from the
842 # configuration components; this ensures that for sysv4, unix/common
843 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
844 # after sysv4).
845 sysnames="`echo $implied $* $parent`"
846 test -n "$sysnames" && set $sysnames
847 done
849 # Add the default directories.
850 default_sysnames="sysdeps/generic/elf sysdeps/generic"
851 sysnames="$names $default_sysnames"
852 AC_SUBST(sysnames)
853 # The other names were emitted during the scan.
854 AC_MSG_RESULT($default_sysnames)
856 # Collect the list of add-ons that supply partial sysdeps trees.
857 sysdeps_add_ons=
858 for add_on in $add_ons; do
859 case "$add_on" in
860 /*) xsrcdir= ;;
861 *) xsrcdir="$srcdir/" ;;
862 esac
864 test -d "$xsrcdir$add_on/sysdeps" || {
865 case "$configured_add_ons " in
866 *" $add_on "*) ;;
867 *|'')
868 AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
869 ;;
870 esac
871 continue
872 }
874 sysdeps_add_ons="$sysdeps_add_ons $add_on"
875 case "$sysnames_add_ons" in
876 *" $add_on/ "*) ;;
877 *|'')
878 AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
879 continue ;;
880 esac
882 found=no
883 for d in $sysnames; do
884 case "$d" in
885 $add_on/sysdeps/*) ;;
886 *) continue ;;
887 esac
888 (cd "$xsrcdir$d" && for f in *[[!~]]; do
889 case "$f" in
890 sys|bits)
891 for ff in $f/*.h; do
892 test -d "$ff" || { test -e "$ff" && exit 88; }
893 done
894 ;;
895 *)
896 test -d "$f" || { test -e "$f" && exit 88; }
897 ;;
898 esac
899 done)
900 if test $? -eq 88; then
901 found=yes
902 break
903 fi
904 done
905 if test $found = no; then
906 AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
907 fi
908 done
909 AC_SUBST(sysdeps_add_ons)
912 ### Locate tools.
914 AC_PROG_INSTALL
915 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
916 # The makefiles need to use a different form to find it in $srcdir.
917 INSTALL='\$(..)./scripts/install-sh -c'
918 fi
919 AC_PROG_LN_S
921 LIBC_PROG_BINUTILS
922 AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
924 # Accept binutils 2.20 or newer.
925 AC_CHECK_PROG_VER(AS, $AS, --version,
926 [GNU assembler.* \([0-9]*\.[0-9.]*\)],
927 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as")
928 AC_CHECK_PROG_VER(LD, $LD, --version,
929 [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
930 [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
932 # These programs are version sensitive.
933 AC_CHECK_TOOL_PREFIX
934 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
935 [version \([egcygnustpi-]*[0-9.]*\)], [4.[3-9].* | 4.[1-9][0-9].* | [5-9].* ],
936 critic_missing="$critic_missing gcc")
937 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
938 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
939 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
941 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
942 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
943 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
944 MSGFMT=: aux_missing="$aux_missing msgfmt")
945 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
946 [GNU texinfo.* \([0-9][0-9.]*\)],
947 [4.*],
948 MAKEINFO=: aux_missing="$aux_missing makeinfo")
949 AC_CHECK_PROG_VER(SED, sed, --version,
950 [GNU sed version \([0-9]*\.[0-9.]*\)],
951 [3.0[2-9]*|3.[1-9]*|[4-9]*],
952 SED=: aux_missing="$aux_missing sed")
954 AC_CHECK_TOOL(READELF, readelf, false)
956 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
957 case "x$AUTOCONF" in
958 xno|x|x:) AUTOCONF=no ;;
959 *)
960 AC_CACHE_CHECK(dnl
961 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
962 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
963 libc_cv_autoconf_works=yes
964 else
965 libc_cv_autoconf_works=no
966 fi])
967 test $libc_cv_autoconf_works = yes || AUTOCONF=no
968 ;;
969 esac
970 if test "x$AUTOCONF" = xno; then
971 aux_missing="$aux_missing autoconf"
972 fi
974 test -n "$critic_missing" && AC_MSG_ERROR([
975 *** These critical programs are missing or too old:$critic_missing
976 *** Check the INSTALL file for required versions.])
978 test -n "$aux_missing" && AC_MSG_WARN([
979 *** These auxiliary programs are missing or incompatible versions:$aux_missing
980 *** some features will be disabled.
981 *** Check the INSTALL file for required versions.])
983 # if using special system headers, find out the compiler's sekrit
984 # header directory and add that to the list. NOTE: Only does the right
985 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
986 if test -n "$sysheaders"; then
987 SYSINCLUDES=-nostdinc
988 for d in include include-fixed; do
989 i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
990 SYSINCLUDES="$SYSINCLUDES -isystem $i"
991 done
992 SYSINCLUDES="$SYSINCLUDES \
993 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
994 if test -n "$CXX"; then
995 CXX_SYSINCLUDES=
996 cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
997 cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
998 for d in include "$cxxmachine/include"; do
999 i=../../../../$d/c++/$cxxversion
1000 cxxheaders=`$CXX -print-file-name="$i"` &&
1001 test "x$cxxheaders" != x && test "x$i" != "x$cxxheaders" &&
1002 CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders \
1003 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
1004 done
1005 fi
1006 fi
1007 AC_SUBST(SYSINCLUDES)
1008 AC_SUBST(CXX_SYSINCLUDES)
1010 # Test if LD_LIBRARY_PATH contains the notation for the current directory
1011 # since this would lead to problems installing/building glibc.
1012 # LD_LIBRARY_PATH contains the current directory if one of the following
1013 # is true:
1014 # - one of the terminals (":" and ";") is the first or last sign
1015 # - two terminals occur directly after each other
1016 # - the path contains an element with a dot in it
1017 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
1018 changequote(,)dnl
1019 case ${LD_LIBRARY_PATH} in
1020 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
1021 ld_library_path_setting="contains current directory"
1022 ;;
1023 *)
1024 ld_library_path_setting="ok"
1025 ;;
1026 esac
1027 changequote([,])dnl
1028 AC_MSG_RESULT($ld_library_path_setting)
1029 if test "$ld_library_path_setting" != "ok"; then
1030 AC_MSG_ERROR([
1031 *** LD_LIBRARY_PATH shouldn't contain the current directory when
1032 *** building glibc. Please change the environment variable
1033 *** and run configure again.])
1034 fi
1036 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
1037 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
1038 libc_cv_gcc_static_libgcc=
1039 else
1040 libc_cv_gcc_static_libgcc=-static-libgcc
1041 fi])
1042 AC_SUBST(libc_cv_gcc_static_libgcc)
1044 AC_PATH_PROG(BASH_SHELL, bash, no)
1045 if test "$BASH_SHELL" != no &&
1046 $BASH_SHELL -c 'test "$BASH_VERSINFO" \
1047 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
1048 libc_cv_have_bash2=yes
1049 else
1050 libc_cv_have_bash2=no
1051 fi
1052 AC_SUBST(libc_cv_have_bash2)
1054 dnl We need a ksh compatible shell for tzselect.
1055 if test "$BASH_SHELL" = no; then
1056 AC_PATH_PROG(KSH, ksh, no)
1057 if test "$KSH" = no; then
1058 libc_cv_have_ksh=no
1059 else
1060 libc_cv_have_ksh=yes
1061 fi
1062 else
1063 KSH="$BASH_SHELL"
1064 AC_SUBST(KSH)
1065 libc_cv_have_ksh=yes
1066 fi
1067 AC_SUBST(libc_cv_have_ksh)
1069 AC_PROG_AWK
1070 AC_PATH_PROG(PERL, perl, no)
1071 if test "$PERL" != no &&
1072 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
1073 PERL=no
1074 fi
1075 AC_PATH_PROG(INSTALL_INFO, install-info, no,
1076 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
1077 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
1079 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
1080 AC_TRY_COMPILE(dnl
1081 [#define __need_size_t
1082 #define __need_wchar_t
1083 #include <stddef.h>
1084 #define __need_NULL
1085 #include <stddef.h>], [size_t size; wchar_t wchar;
1086 #ifdef offsetof
1087 #error stddef.h ignored __need_*
1088 #endif
1089 if (&size == NULL || &wchar == NULL) abort ();],
1090 libc_cv_friendly_stddef=yes,
1091 libc_cv_friendly_stddef=no)])
1092 if test $libc_cv_friendly_stddef = yes; then
1093 config_vars="$config_vars
1094 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
1095 fi
1097 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
1098 libc_cv_need_minus_P, [dnl
1099 cat > conftest.S <<EOF
1100 #include "confdefs.h"
1101 /* Nothing whatsoever. */
1102 EOF
1103 if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
1104 libc_cv_need_minus_P=no
1105 else
1106 libc_cv_need_minus_P=yes
1107 fi
1108 rm -f conftest*])
1109 if test $libc_cv_need_minus_P = yes; then
1110 config_vars="$config_vars
1111 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
1112 fi
1114 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
1115 cat > conftest.s <<EOF
1116 ${libc_cv_dot_text}
1117 foo:
1118 .set glibc_conftest_frobozz,foo
1119 $libc_cv_asm_global_directive glibc_conftest_frobozz
1120 EOF
1121 # The alpha-dec-osf1 assembler gives only a warning for `.set'
1122 # (but it doesn't work), so we must do a linking check to be sure.
1123 cat > conftest1.c <<\EOF
1124 extern int glibc_conftest_frobozz;
1125 void _start() { glibc_conftest_frobozz = 1; }
1126 EOF
1127 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1128 -nostartfiles -nostdlib \
1129 -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1130 libc_cv_asm_set_directive=yes
1131 else
1132 libc_cv_asm_set_directive=no
1133 fi
1134 rm -f conftest*])
1135 if test $libc_cv_asm_set_directive = yes; then
1136 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
1137 fi
1139 AC_CACHE_CHECK(for assembler gnu_unique_object symbol type,
1140 libc_cv_asm_unique_object, [dnl
1141 cat > conftest.s <<EOF
1142 ${libc_cv_dot_text}
1143 _sym:
1144 .type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
1145 EOF
1146 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1147 libc_cv_asm_unique_object=yes
1148 else
1149 libc_cv_asm_unique_object=no
1150 fi
1151 rm -f conftest*])
1152 if test $libc_cv_asm_unique_object = yes; then
1153 AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
1154 fi
1156 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
1157 [cat > conftest.s <<EOF
1158 ${libc_cv_dot_text}
1159 _sym:
1160 .symver _sym,sym@VERS
1161 EOF
1162 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1163 libc_cv_asm_symver_directive=yes
1164 else
1165 libc_cv_asm_symver_directive=no
1166 fi
1167 rm -f conftest*])
1168 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
1169 if test $libc_cv_asm_symver_directive = yes; then
1170 cat > conftest.s <<EOF
1171 ${libc_cv_dot_text}
1172 _sym:
1173 .symver _sym,sym@VERS
1174 EOF
1175 cat > conftest.map <<EOF
1176 VERS_1 {
1177 global: sym;
1178 };
1180 VERS_2 {
1181 global: sym;
1182 } VERS_1;
1183 EOF
1184 if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
1185 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
1186 -o conftest.so conftest.o
1187 -nostartfiles -nostdlib
1188 -Wl,--version-script,conftest.map
1189 1>&AS_MESSAGE_LOG_FD]);
1190 then
1191 libc_cv_ld_version_script_option=yes
1192 else
1193 libc_cv_ld_version_script_option=no
1194 fi
1195 else
1196 libc_cv_ld_version_script_option=no
1197 fi
1198 else
1199 libc_cv_ld_version_script_option=no
1200 fi
1201 rm -f conftest*])
1202 if test $shared != no &&
1203 test $libc_cv_asm_symver_directive = yes &&
1204 test $libc_cv_ld_version_script_option = yes &&
1205 test $enable_versioning = yes; then
1206 VERSIONING=yes
1207 AC_DEFINE(DO_VERSIONING)
1208 else
1209 VERSIONING=no
1210 fi
1211 AC_SUBST(VERSIONING)
1213 if test $shared != no && test $VERSIONING = no; then
1214 echo "\
1215 *** WARNING: You should not compile GNU libc without versioning. Not using
1216 *** versioning will introduce incompatibilities so that old binaries
1217 *** will not run anymore.
1218 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
1219 fi
1220 AC_CACHE_CHECK(for .previous assembler directive,
1221 libc_cv_asm_previous_directive, [dnl
1222 cat > conftest.s <<EOF
1223 .section foo_section
1224 .previous
1225 EOF
1226 if AC_TRY_COMMAND(${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 AC_MSG_ERROR(assembler support for symbol visibility is required)
1263 fi
1264 rm -f conftest*])
1266 if test $libc_cv_asm_protected_directive = yes; then
1267 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1268 libc_cv_visibility_attribute,
1269 [cat > conftest.c <<EOF
1270 int foo __attribute__ ((visibility ("hidden"))) = 1;
1271 int bar __attribute__ ((visibility ("protected"))) = 1;
1272 EOF
1273 libc_cv_visibility_attribute=no
1274 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1275 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1276 if grep '\.protected.*bar' conftest.s >/dev/null; then
1277 libc_cv_visibility_attribute=yes
1278 fi
1279 fi
1280 fi
1281 rm -f conftest.{c,s}
1282 ])
1283 if test $libc_cv_visibility_attribute != yes; then
1284 AC_MSG_ERROR(compiler support for visibility attribute is required)
1285 fi
1286 fi
1288 if test $libc_cv_visibility_attribute = yes; then
1289 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1290 libc_cv_broken_visibility_attribute,
1291 [cat > conftest.c <<EOF
1292 int foo (int x);
1293 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1294 int bar (int x) { return x; }
1295 EOF
1296 libc_cv_broken_visibility_attribute=yes
1297 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1298 changequote(,)dnl
1299 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1300 changequote([,])dnl
1301 libc_cv_broken_visibility_attribute=no
1302 fi
1303 fi
1304 rm -f conftest.c conftest.s
1305 ])
1306 if test $libc_cv_broken_visibility_attribute = yes; then
1307 AC_MSG_ERROR(working compiler support for visibility attribute is required)
1308 fi
1309 fi
1311 AC_CACHE_CHECK(for broken __attribute__((alias())),
1312 libc_cv_broken_alias_attribute,
1313 [cat > conftest.c <<EOF
1314 extern int foo (int x) __asm ("xyzzy");
1315 int bar (int x) { return x; }
1316 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1317 extern int dfoo;
1318 extern __typeof (dfoo) dfoo __asm ("abccb");
1319 int dfoo = 1;
1320 EOF
1321 libc_cv_broken_alias_attribute=yes
1322 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
1323 if grep 'xyzzy' conftest.s >/dev/null &&
1324 grep 'abccb' conftest.s >/dev/null; then
1325 libc_cv_broken_alias_attribute=no
1326 fi
1327 fi
1328 rm -f conftest.c conftest.s
1329 ])
1330 if test $libc_cv_broken_alias_attribute = yes; then
1331 AC_MSG_ERROR(working alias attribute support required)
1332 fi
1334 if test $libc_cv_visibility_attribute = yes; then
1335 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1336 libc_cv_have_sdata_section,
1337 [echo "int i;" > conftest.c
1338 libc_cv_have_sdata_section=no
1339 if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1340 | grep '\.sdata' >/dev/null; then
1341 libc_cv_have_sdata_section=yes
1342 fi
1343 rm -f conftest.c conftest.so
1344 ])
1345 if test $libc_cv_have_sdata_section = yes; then
1346 AC_DEFINE(HAVE_SDATA_SECTION)
1347 fi
1348 fi
1350 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1351 libc_cv_initfini_array, [dnl
1352 LIBC_TRY_LINK_STATIC([
1353 int foo (void) { return 1; }
1354 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1355 ],
1356 [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
1357 libc_cv_initfini_array=yes
1358 else
1359 libc_cv_initfini_array=no
1360 fi],
1361 [libc_cv_initfini_array=no])
1362 ])
1363 if test $libc_cv_initfini_array != yes; then
1364 AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
1365 fi
1367 AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
1368 libc_cv_ctors_header, [dnl
1369 libc_cv_ctors_header=yes
1370 LIBC_TRY_LINK_STATIC([
1371 __attribute__ ((constructor)) void ctor (void) { asm (""); }
1372 __attribute__ ((destructor)) void dtor (void) { asm (""); }
1373 ],
1374 [dnl
1375 AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
1376 { gsub(/\@<:@ */, "@<:@") }
1377 $2 == ".ctors" || $2 == ".dtors" {
1378 size = strtonum("0x" $6)
1379 align = strtonum("0x" $NF)
1380 seen@<:@$2@:>@ = 1
1381 stub@<:@$2@:>@ = size == align * 2
1382 }
1383 END {
1384 ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
1385 dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
1386 exit ((ctors_ok && dtors_ok) ? 0 : 1)
1387 }
1388 '], [libc_cv_ctors_header=no])
1389 ], [dnl
1390 AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
1391 ])
1392 ])
1393 if test $libc_cv_ctors_header = no; then
1394 AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
1395 fi
1397 AC_CACHE_CHECK(for libunwind-support in compiler,
1398 libc_cv_cc_with_libunwind, [
1399 cat > conftest.c <<EOF
1400 int main (void) { return 0; }
1401 EOF
1402 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
1403 conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
1404 libc_cv_cc_with_libunwind=yes
1405 else
1406 libc_cv_cc_with_libunwind=no
1407 fi
1408 rm -f conftest*])
1409 AC_SUBST(libc_cv_cc_with_libunwind)
1410 if test $libc_cv_cc_with_libunwind = yes; then
1411 AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
1412 fi
1414 AC_CACHE_CHECK(for -z nodelete option,
1415 libc_cv_z_nodelete, [dnl
1416 cat > conftest.c <<EOF
1417 int _start (void) { return 42; }
1418 EOF
1419 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1420 -fPIC -shared -o conftest.so conftest.c
1421 -nostartfiles -nostdlib
1422 -Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
1423 then
1424 libc_cv_z_nodelete=yes
1425 else
1426 AC_MSG_ERROR(linker with -z nodelete support required)
1427 fi
1428 rm -f conftest*])
1430 AC_CACHE_CHECK(for -z nodlopen option,
1431 libc_cv_z_nodlopen, [dnl
1432 cat > conftest.c <<EOF
1433 int _start (void) { return 42; }
1434 EOF
1435 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1436 -fPIC -shared -o conftest.so conftest.c
1437 -nostartfiles -nostdlib
1438 -Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
1439 then
1440 libc_cv_z_nodlopen=yes
1441 else
1442 AC_MSG_ERROR(linker with -z nodlopen support required)
1443 fi
1444 rm -f conftest*])
1446 AC_CACHE_CHECK(for -z initfirst option,
1447 libc_cv_z_initfirst, [dnl
1448 cat > conftest.c <<EOF
1449 int _start (void) { return 42; }
1450 EOF
1451 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1452 -fPIC -shared -o conftest.so conftest.c
1453 -nostartfiles -nostdlib
1454 -Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
1455 then
1456 libc_cv_z_initfirst=yes
1457 else
1458 AC_MSG_ERROR(linker with -z initfirst support required)
1459 fi
1460 rm -f conftest*])
1462 # Add-on fragments can set these for other machines.
1463 libc_commonpagesize=${libc_commonpagesize:-no}
1464 libc_relro_required=${libc_relro_required:-no}
1465 case "$base_machine" in
1466 i[[34567]]86 | x86_64 | powerpc* | s390*)
1467 libc_commonpagesize=0x1000
1468 libc_relro_required=yes
1469 ;;
1470 sparc*)
1471 libc_commonpagesize=0x2000
1472 libc_relro_required=yes
1473 ;;
1474 esac
1476 if test $libc_commonpagesize != no; then
1477 AC_CACHE_CHECK(for -z relro option,
1478 libc_cv_z_relro, [dnl
1479 libc_cv_z_relro=no
1480 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
1481 int _start (void) { return 42; }
1482 extern void _exit (int);
1483 /* Since these pointers are const, they should go in rodata.
1484 Since they refer to functions that have to be resolved by
1485 dynamic linking, they should instead go in RELRO data. */
1486 const void *const relro[] = { &_start, &_exit, 0 };
1487 /* GNU ld fails to produce RELRO data when it's very small and there is no
1488 normal writable data following it, or if only uninitialized (.bss) data
1489 follows it, or only very small writable data. */
1490 int data[0x10000] = { 1, };
1491 ]])])
1492 cat > conftest.awk <<\EOF
1493 BEGIN {
1494 result = "no"
1495 commonpagesize = strtonum(commonpagesize)
1496 }
1497 { print "LINE:", $0 > "/dev/stderr" }
1498 $1 == "GNU_RELRO" {
1499 vaddr = strtonum($3)
1500 memsz = strtonum($6)
1501 end = vaddr + memsz
1502 printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \
1503 vaddr, memsz, end, commonpagesize > "/dev/stderr"
1504 result = (end % commonpagesize == 0) ? "yes" : "broken"
1505 }
1506 END { print result }
1507 EOF
1508 AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1509 -fPIC -shared -o conftest.so conftest.c
1510 -nostartfiles -nostdlib
1511 -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) &&
1512 AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) &&
1513 AC_TRY_COMMAND([
1514 $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk
1515 conftest.ph > conftest.cps
1516 ]) &&
1517 libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD`
1518 rm -f conftest*])
1519 if { test "x$libc_relro_required" = xyes &&
1520 test "x$libc_cv_z_relro" != xyes
1521 }
1522 then
1523 AC_MSG_ERROR(linker with -z relro support required)
1524 fi
1525 else
1526 AC_MSG_WARN([missing architecture parameter to check for working -z relro])
1527 fi
1529 AC_CACHE_CHECK(for -Bgroup option,
1530 libc_cv_Bgroup, [dnl
1531 cat > conftest.c <<EOF
1532 int _start (void) { return 42; }
1533 EOF
1534 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1535 -fPIC -shared -o conftest.so conftest.c
1536 -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
1537 then
1538 libc_cv_Bgroup=yes
1539 else
1540 libc_cv_Bgroup=no
1541 fi
1542 rm -f conftest*])
1543 AC_SUBST(libc_cv_Bgroup)
1545 AC_CACHE_CHECK(for libgcc_s suffix,
1546 libc_cv_libgcc_s_suffix, [dnl
1547 cat > conftest.c <<EOF
1548 int main (void) { return 0; }
1549 EOF
1550 changequote(,)dnl
1551 libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1552 -fPIC -shared -shared-libgcc -o conftest.so \
1553 conftest.c -v 2>&1 >/dev/null \
1554 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1555 changequote([,])dnl
1556 rm -f conftest*])
1557 AC_SUBST(libc_cv_libgcc_s_suffix)
1559 AC_CACHE_CHECK(for --as-needed option,
1560 libc_cv_as_needed, [dnl
1561 cat > conftest.c <<EOF
1562 int main (void) { return 0; }
1563 EOF
1564 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1565 -fPIC -shared -o conftest.so conftest.c
1566 -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
1567 -nostdlib 1>&AS_MESSAGE_LOG_FD])
1568 then
1569 libc_cv_as_needed=yes
1570 else
1571 libc_cv_as_needed=no
1572 fi
1573 rm -f conftest*])
1574 AC_SUBST(libc_cv_as_needed)
1576 ASFLAGS_config=
1577 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
1578 libc_cv_as_noexecstack, [dnl
1579 cat > conftest.c <<EOF
1580 void foo (void) { }
1581 EOF
1582 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
1583 -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
1584 && grep -q .note.GNU-stack conftest.s \
1585 && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
1586 -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
1587 then
1588 libc_cv_as_noexecstack=yes
1589 else
1590 libc_cv_as_noexecstack=no
1591 fi
1592 rm -f conftest*])
1593 if test $libc_cv_as_noexecstack = yes; then
1594 ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
1595 fi
1596 AC_SUBST(ASFLAGS_config)
1598 AC_CACHE_CHECK(for -z combreloc,
1599 libc_cv_z_combreloc, [dnl
1600 cat > conftest.c <<EOF
1601 extern int bar (int);
1602 extern int mumble;
1603 int foo (void) { return bar (mumble); }
1604 EOF
1605 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1606 -fPIC -shared -o conftest.so conftest.c
1607 -nostdlib -nostartfiles
1608 -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
1609 then
1610 dnl The following test is a bit weak. We must use a tool which can test
1611 dnl cross-platform since the gcc used can be a cross compiler. Without
1612 dnl introducing new options this is not easily doable. Instead use a tool
1613 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1614 dnl look for a section named .rel.dyn.
1615 if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1616 libc_cv_z_combreloc=yes
1617 else
1618 libc_cv_z_combreloc=no
1619 fi
1620 else
1621 libc_cv_z_combreloc=no
1622 fi
1623 rm -f conftest*])
1624 if test "$libc_cv_z_combreloc" = yes; then
1625 AC_DEFINE(HAVE_Z_COMBRELOC)
1626 fi
1627 AC_SUBST(libc_cv_z_combreloc)
1629 AC_CACHE_CHECK(for -z execstack,
1630 libc_cv_z_execstack, [dnl
1631 cat > conftest.c <<EOF
1632 int _start (void) { return 42; }
1633 EOF
1634 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1635 -fPIC -shared -o conftest.so conftest.c
1636 -Wl,-z,execstack -nostdlib
1637 1>&AS_MESSAGE_LOG_FD])
1638 then
1639 libc_cv_z_execstack=yes
1640 else
1641 libc_cv_z_execstack=no
1642 fi
1643 rm -f conftest*])
1644 AC_SUBST(libc_cv_z_execstack)
1646 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
1647 cat > conftest.c <<EOF
1648 int foo;
1649 main () { return 0;}
1650 EOF
1651 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
1652 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1653 then
1654 libc_cv_fpie=yes
1655 else
1656 libc_cv_fpie=no
1657 fi
1658 rm -f conftest*])
1660 AC_SUBST(libc_cv_fpie)
1662 AC_CACHE_CHECK(for --hash-style option,
1663 libc_cv_hashstyle, [dnl
1664 cat > conftest.c <<EOF
1665 int _start (void) { return 42; }
1666 EOF
1667 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1668 -fPIC -shared -o conftest.so conftest.c
1669 -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
1670 then
1671 libc_cv_hashstyle=yes
1672 else
1673 libc_cv_hashstyle=no
1674 fi
1675 rm -f conftest*])
1676 AC_SUBST(libc_cv_hashstyle)
1678 # The linker's default -shared behavior is good enough if it
1679 # does these things that our custom linker scripts ensure that
1680 # all allocated NOTE sections come first.
1681 if test "$use_default_link" = default; then
1682 AC_CACHE_CHECK([for sufficient default -shared layout],
1683 libc_cv_use_default_link, [dnl
1684 libc_cv_use_default_link=no
1685 cat > conftest.s <<\EOF
1686 .section .note.a,"a",%note
1687 .balign 4
1688 .long 4,4,9
1689 .string "GNU"
1690 .string "foo"
1691 .section .note.b,"a",%note
1692 .balign 4
1693 .long 4,4,9
1694 .string "GNU"
1695 .string "bar"
1696 EOF
1697 if AC_TRY_COMMAND([dnl
1698 ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
1699 ac_try=`$READELF -S conftest.so | sed -n \
1700 ['${x;p;}
1701 s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
1702 t a
1703 b
1704 : a
1705 H']`
1706 then
1707 libc_seen_a=no libc_seen_b=no
1708 set -- $ac_try
1709 while test $# -ge 2 -a "$1" = NOTE; do
1710 case "$2" in
1711 .note.a) libc_seen_a=yes ;;
1712 .note.b) libc_seen_b=yes ;;
1713 esac
1714 shift 2
1715 done
1716 case "$libc_seen_a$libc_seen_b" in
1717 yesyes)
1718 libc_cv_use_default_link=yes
1719 ;;
1720 *)
1721 echo >&AS_MESSAGE_LOG_FD "\
1722 $libc_seen_a$libc_seen_b from:
1723 $ac_try"
1724 ;;
1725 esac
1726 fi
1727 rm -f conftest*])
1728 use_default_link=$libc_cv_use_default_link
1729 fi
1731 AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
1732 if libc_cv_output_format=`
1733 ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
1734 then
1735 :
1736 else
1737 libc_cv_output_format=
1738 fi
1739 test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
1740 AC_SUBST(libc_cv_output_format)
1742 AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
1743 cat > conftest.c <<EOF
1744 int foo;
1745 EOF
1746 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
1747 conftest.c 1>&AS_MESSAGE_LOG_FD])
1748 then
1749 libc_cv_fno_toplevel_reorder=yes
1750 else
1751 libc_cv_fno_toplevel_reorder=no
1752 fi
1753 rm -f conftest*])
1754 if test $libc_cv_fno_toplevel_reorder = yes; then
1755 fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
1756 else
1757 fno_unit_at_a_time=-fno-unit-at-a-time
1758 fi
1759 AC_SUBST(fno_unit_at_a_time)
1761 AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
1762 cat > conftest.c <<EOF
1763 int foo;
1764 main () { return 0;}
1765 EOF
1766 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
1767 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
1768 then
1769 libc_cv_ssp=yes
1770 else
1771 libc_cv_ssp=no
1772 fi
1773 rm -f conftest*])
1774 AC_SUBST(libc_cv_ssp)
1776 AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
1777 cat > conftest.c <<EOF
1778 int foo;
1779 #ifdef __GNUC_GNU_INLINE__
1780 main () { return 0;}
1781 #else
1782 #error
1783 #endif
1784 EOF
1785 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
1786 -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
1787 then
1788 libc_cv_gnu89_inline=yes
1789 else
1790 libc_cv_gnu89_inline=no
1791 fi
1792 rm -f conftest*])
1793 if test $libc_cv_gnu89_inline = yes; then
1794 gnu89_inline=-fgnu89-inline
1795 else
1796 gnu89_inline=
1797 fi
1798 AC_SUBST(gnu89_inline)
1800 AC_CACHE_CHECK(whether cc puts quotes around section names,
1801 libc_cv_have_section_quotes,
1802 [cat > conftest.c <<EOF
1803 static const int foo
1804 __attribute__ ((section ("bar"))) = 1;
1805 EOF
1806 if ${CC-cc} -S conftest.c -o conftest.s; then
1807 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1808 libc_cv_have_section_quotes=yes
1809 else
1810 libc_cv_have_section_quotes=no
1811 fi
1812 else
1813 libc_cv_have_section_quotes=unknown
1814 fi
1815 rm -f conftest.{c,s}
1816 ])
1817 if test $libc_cv_have_section_quotes = yes; then
1818 AC_DEFINE(HAVE_SECTION_QUOTES)
1819 fi
1821 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1822 [dnl
1823 cat > conftest.s <<EOF
1824 ${libc_cv_dot_text}
1825 ${libc_cv_asm_global_directive} foo
1826 foo:
1827 .weak foo
1828 .weak bar; bar = foo
1829 EOF
1830 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1831 libc_cv_asm_weak_directive=yes
1832 else
1833 libc_cv_asm_weak_directive=no
1834 fi
1835 rm -f conftest*])
1837 if test $libc_cv_asm_weak_directive = no; then
1838 AC_CACHE_CHECK(for assembler .weakext directive,
1839 libc_cv_asm_weakext_directive,
1840 [dnl
1841 cat > conftest.s <<EOF
1842 ${libc_cv_dot_text}
1843 ${libc_cv_asm_global_directive} foo
1844 foo:
1845 .weakext bar foo
1846 .weakext baz
1847 ${libc_cv_asm_global_directive} baz
1848 baz:
1849 EOF
1850 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1851 libc_cv_asm_weakext_directive=yes
1852 else
1853 libc_cv_asm_weakext_directive=no
1854 fi
1855 rm -f conftest*])
1857 fi # no .weak
1859 if test $libc_cv_asm_weak_directive = yes; then
1860 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1861 elif test $libc_cv_asm_weakext_directive = yes; then
1862 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1863 fi
1865 AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
1866 case $machine in
1867 sparc/sparc64*) cfi_offset=2047;;
1868 *) cfi_offset=0;;
1869 esac
1870 cat > conftest.s <<EOF
1871 .text
1872 .type func,%function
1873 func:
1874 .cfi_startproc
1875 .cfi_remember_state
1876 .cfi_rel_offset 1, $cfi_offset
1877 .cfi_endproc
1878 EOF
1879 if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
1880 libc_cv_asm_cfi_directives=yes
1881 else
1882 libc_cv_asm_cfi_directives=no
1883 fi
1884 rm -f conftest*])
1885 if test $libc_cv_asm_cfi_directives = yes; then
1886 AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
1887 fi
1889 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1890 cat > conftest.c <<\EOF
1891 _start () {}
1892 int __eh_pc;
1893 __throw () {}
1894 EOF
1895 dnl No \ in command here because it ends up inside ''.
1896 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1897 -nostdlib -nostartfiles -Wl,--no-whole-archive
1898 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1899 libc_cv_ld_no_whole_archive=yes
1900 else
1901 libc_cv_ld_no_whole_archive=no
1902 fi
1903 rm -f conftest*])
1904 if test $libc_cv_ld_no_whole_archive = no; then
1905 AC_MSG_ERROR([support for --no-whole-archive is needed])
1906 fi
1908 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1909 cat > conftest.c <<\EOF
1910 _start () {}
1911 int __eh_pc;
1912 __throw () {}
1913 EOF
1914 dnl No \ in command here because it ends up inside ''.
1915 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
1916 -nostdlib -nostartfiles -fexceptions
1917 -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
1918 libc_cv_gcc_exceptions=yes
1919 else
1920 libc_cv_gcc_exceptions=no
1921 fi
1922 rm -f conftest*])
1923 if test $libc_cv_gcc_exceptions = yes; then
1924 exceptions=-fexceptions
1925 fi
1926 AC_SUBST(exceptions)dnl
1928 if test "$host_cpu" = powerpc ; then
1929 # Check for a bug present in at least versions 2.8.x of GCC
1930 # and versions 1.0.x of EGCS.
1931 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1932 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1933 libc_cv_c_asmcr0_bug='no',
1934 libc_cv_c_asmcr0_bug='yes')])
1935 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1936 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1937 fi
1938 fi
1940 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1941 cat > conftest.c <<\EOF
1942 void zero (void *x)
1943 {
1944 __builtin_memset (x, 0, 1000);
1945 }
1946 EOF
1947 dnl
1948 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1949 then
1950 libc_cv_gcc_builtin_memset=no
1951 else
1952 libc_cv_gcc_builtin_memset=yes
1953 fi
1954 rm -f conftest* ])
1955 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1956 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1957 fi
1959 AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
1960 cat > conftest.c <<\EOF
1961 extern char *strstr (const char *, const char *) __asm ("my_strstr");
1962 char *foo (const char *a, const char *b)
1963 {
1964 return __builtin_strstr (a, b);
1965 }
1966 EOF
1967 dnl
1968 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
1969 then
1970 libc_cv_gcc_builtin_redirection=yes
1971 else
1972 libc_cv_gcc_builtin_redirection=no
1973 fi
1974 rm -f conftest* ])
1975 if test "$libc_cv_gcc_builtin_redirection" = no; then
1976 AC_MSG_ERROR([support for the symbol redirection needed])
1977 fi
1979 dnl Check whether the compiler supports the __thread keyword.
1980 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1981 [cat > conftest.c <<\EOF
1982 __thread int a = 42;
1983 EOF
1984 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
1985 libc_cv_gcc___thread=yes
1986 else
1987 libc_cv_gcc___thread=no
1988 fi
1989 rm -f conftest*])
1990 if test "$libc_cv_gcc___thread" = no; then
1991 AC_MSG_ERROR([support for the __thread keyword is required])
1992 fi
1994 dnl Check whether the compiler supports the tls_model attribute.
1995 AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
1996 cat > conftest.c <<\EOF
1997 extern __thread int a __attribute__((tls_model ("initial-exec")));
1998 EOF
1999 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
2000 libc_cv_gcc_tls_model_attr=yes
2001 else
2002 libc_cv_gcc_tls_model_attr=no
2003 fi
2004 rm -f conftest*])
2005 if test "$libc_cv_gcc_tls_model_attr" = no; then
2006 AC_MSG_ERROR([support for the tls_model attribute is required])
2007 fi
2009 if test -n "$submachine"; then
2010 AC_CACHE_CHECK([for compiler option for CPU variant],
2011 libc_cv_cc_submachine, [dnl
2012 libc_cv_cc_submachine=no
2013 for opt in "-march=$submachine" "-mcpu=$submachine"; do
2014 if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
2015 libc_cv_cc_submachine="$opt"
2016 break
2017 fi
2018 done])
2019 if test "x$libc_cv_cc_submachine" = xno; then
2020 AC_MSG_ERROR([${CC-cc} does not support $submachine])
2021 fi
2022 fi
2023 AC_SUBST(libc_cv_cc_submachine)
2025 dnl Check whether we have the gd library available.
2026 AC_MSG_CHECKING(for libgd)
2027 if test "$with_gd" != "no"; then
2028 old_CFLAGS="$CFLAGS"
2029 CFLAGS="$CFLAGS $libgd_include"
2030 old_LDFLAGS="$LDFLAGS"
2031 LDFLAGS="$LDFLAGS $libgd_ldflags"
2032 old_LIBS="$LIBS"
2033 LIBS="$LIBS -lgd -lpng -lz -lm"
2034 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
2035 CFLAGS="$old_CFLAGS"
2036 LDFLAGS="$old_LDFLAGS"
2037 LIBS="$old_LIBS"
2038 else
2039 LIBGD=no
2040 fi
2041 AC_MSG_RESULT($LIBGD)
2042 AC_SUBST(LIBGD)
2044 # SELinux detection
2045 if test x$with_selinux = xno ; then
2046 have_selinux=no;
2047 else
2048 # See if we have the SELinux library
2049 AC_CHECK_LIB(selinux, is_selinux_enabled,
2050 have_selinux=yes, have_selinux=no)
2051 # See if we have the SELinux header with the NSCD permissions in it.
2052 if test x$have_selinux = xyes ; then
2053 AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
2054 AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
2055 [#ifdef NSCD__SHMEMHOST
2056 return 0;
2057 #else
2058 #error NSCD__SHMEMHOST not defined
2059 #endif],
2060 have_selinux=yes, have_selinux=no)
2061 AC_MSG_RESULT($have_selinux)
2062 fi
2064 if test x$with_selinux = xyes ; then
2065 if test x$have_selinux = xno ; then
2066 AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found])
2067 fi
2068 fi
2069 fi
2070 # Check if we're building with SELinux support.
2071 if test "x$have_selinux" = xyes; then
2072 AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
2074 # See if we have the libaudit library
2075 AC_CHECK_LIB(audit, audit_log_user_avc_message,
2076 have_libaudit=yes, have_libaudit=no)
2077 if test "x$have_libaudit" = xyes; then
2078 AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
2079 fi
2080 AC_SUBST(have_libaudit)
2082 # See if we have the libcap library
2083 AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
2084 if test "x$have_libcap" = xyes; then
2085 AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
2086 fi
2087 AC_SUBST(have_libcap)
2088 fi
2089 AC_SUBST(have_selinux)
2091 dnl check for the size of 'long double'.
2092 AC_CHECK_SIZEOF(long double, 0)
2093 sizeof_long_double=$ac_cv_sizeof_long_double
2094 AC_SUBST(sizeof_long_double)
2096 ### End of automated tests.
2097 ### Now run sysdeps configure fragments.
2099 # They also can set these variables.
2100 use_ldconfig=no
2101 ldd_rewrite_script=no
2102 libc_cv_sysconfdir=$sysconfdir
2103 libc_cv_gcc_unwind_find_fde=no
2104 libc_cv_idn=no
2106 # Iterate over all the sysdep directories we will use, running their
2107 # configure fragments.
2108 for dir in $sysnames; do
2109 case $dir in
2110 /*) dest=$dir ;;
2111 *) dest=$srcdir/$dir ;;
2112 esac
2113 if test -r $dest/configure; then
2114 AC_MSG_RESULT(running configure fragment for $dir)
2115 . $dest/configure
2116 fi
2117 done
2119 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
2120 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
2121 fi
2122 AC_SUBST(libc_cv_gcc_unwind_find_fde)
2124 # Test for old glibc 2.0.x headers so that they can be removed properly
2125 # Search only in includedir.
2126 AC_MSG_CHECKING(for old glibc 2.0.x headers)
2127 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
2128 then
2129 old_glibc_headers=yes
2130 else
2131 old_glibc_headers=no
2132 fi
2133 AC_MSG_RESULT($old_glibc_headers)
2134 if test ${old_glibc_headers} = yes; then
2135 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
2136 AC_MSG_WARN(*** be removed.)
2137 fi
2138 AC_SUBST(old_glibc_headers)
2140 AC_SUBST(libc_cv_slibdir)
2141 AC_SUBST(libc_cv_localedir)
2142 AC_SUBST(libc_cv_sysconfdir)
2143 AC_SUBST(libc_cv_rootsbindir)
2144 AC_SUBST(libc_cv_forced_unwind)
2146 dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
2147 AC_SUBST(libc_cv_cpp_asm_debuginfo)
2148 AC_SUBST(libc_cv_cc_sse4)
2149 AC_SUBST(libc_cv_cc_avx)
2150 AC_SUBST(libc_cv_cc_sse2avx)
2151 AC_SUBST(libc_cv_cc_novzeroupper)
2152 AC_SUBST(libc_cv_cc_fma4)
2153 AC_SUBST(libc_cv_as_i686)
2155 AC_SUBST(use_ldconfig)
2156 AC_SUBST(ldd_rewrite_script)
2158 AC_SUBST(static)
2159 AC_SUBST(shared)
2161 AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
2162 [libc_cv_pic_default=yes
2163 cat > conftest.c <<EOF
2164 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
2165 # error PIC is default.
2166 #endif
2167 EOF
2168 if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
2169 libc_cv_pic_default=no
2170 fi
2171 rm -f conftest.*])
2172 AC_SUBST(libc_cv_pic_default)
2174 AC_SUBST(profile)
2175 AC_SUBST(static_nss)
2177 AC_SUBST(DEFINES)
2179 dnl See sysdeps/mach/configure.in for this variable.
2180 AC_SUBST(mach_interface_list)
2182 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
2183 config_makefile=
2184 else
2185 config_makefile=Makefile
2186 fi
2188 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
2189 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
2190 AC_SUBST(VERSION)
2191 AC_SUBST(RELEASE)
2193 AC_CONFIG_FILES([config.make ${config_makefile}])
2194 AC_CONFIG_COMMANDS([default],[[
2195 case $CONFIG_FILES in *config.make*)
2196 echo "$config_vars" >> config.make;;
2197 esac
2198 test -d bits || mkdir bits]],[[config_vars='$config_vars']])
2199 AC_OUTPUT