| blob | 036491805a70ff7f4283f7742b8ba8efbe02f31f |
1 dnl Process this file with autoconf to produce a configure script.
2 AC_REVISION([$CVSid$])
3 AC_PREREQ(2.11)dnl dnl Minimum Autoconf version required.
4 AC_INIT(include/features.h)
5 AC_CONFIG_HEADER(config.h)
6 AC_CONFIG_AUX_DIR(scripts)
8 # This will get text that should go into config.make.
9 config_vars=
11 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
12 AC_ARG_WITH(gmp, dnl
13 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
14 [dnl
15 case "$with_gmp" in
16 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
17 ''|no) ;;
18 *) config_vars="$config_vars
19 gmp-srcdir = $withval" ;;
20 esac
21 ])
22 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
23 AC_ARG_WITH(gettext, dnl
24 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
25 [dnl
26 case "$with_gettext" in
27 yes)
28 AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
29 ''|no) ;;
30 *)
31 config_vars="$config_vars
32 gettext-srcdir = $withval" ;;
33 esac
34 ])
36 dnl Arguments to specify presence of other packages/features.
37 AC_ARG_WITH(fp, dnl
38 [ --with-fp if using floating-point hardware [default=yes]],
39 with_fp=$withval, with_fp=yes)
40 AC_ARG_WITH(binutils, dnl
41 --with-binutils=PATH specify location of binutils (as and ld),
42 path_binutils=$withval, path_binutils='')
43 AC_ARG_WITH(elf, dnl
44 --with-elf if using the ELF object format,
45 elf=$withval, elf=no)
46 AC_ARG_WITH(cvs, dnl
47 [ --without-cvs if CVS should not be used],
48 with_cvs=$withval, with_cvs=yes)
49 AC_SUBST(with_cvs)
51 AC_ARG_WITH(headers, dnl
52 [ --with-headers=PATH location of system headers to use
53 [e.g. /usr/src/linux/include]
54 [default=compiler default]],
55 sysheaders=$withval, sysheaders='')
57 AC_ARG_ENABLE(libio, dnl
58 [ --enable-libio build in GNU libio instead of GNU stdio],
59 [if test $enableval = yes; then
60 stdio=libio
61 else
62 stdio=stdio
63 fi],
64 stdio=default)
66 AC_ARG_ENABLE(sanity-checks, dnl
67 [ --disable-sanity-checks really do not use threads (should not be used
68 except in special situations) [default=yes]],
69 enable_sanity=$enableval, enable_sanity=yes)
71 dnl Arguments to enable or disable building the static, shared, profiled,
72 dnl and -fomit-frame-pointer libraries.
73 AC_ARG_ENABLE(static, dnl
74 [ --enable-static build static library [default=yes]],
75 static=$enableval, static=yes)
76 AC_ARG_ENABLE(shared, dnl
77 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
78 shared=$enableval, shared=default)
79 AC_ARG_ENABLE(profile, dnl
80 [ --enable-profile build profiled library [default=yes]],
81 profile=$enableval, profile=yes)
82 AC_ARG_ENABLE(omitfp, dnl
83 [ --enable-omitfp build undebuggable optimized library [default=no]],
84 omitfp=$enableval, omitfp=no)
85 AC_ARG_ENABLE(bounded, dnl
86 [ --enable-bounded build with runtime bounds checking [default=no]],
87 bounded=$enableval, bounded=no)
88 AC_ARG_ENABLE(versioning, dnl
89 [ --disable-versioning do not include versioning information in the
90 library objects [default=yes if supported]],
91 enable_versioning=$enableval, enable_versioning=yes)
93 dnl Generic infrastructure for drop-in additions to libc.
94 AC_ARG_ENABLE(add-ons, dnl
95 [ --enable-add-ons[=DIR1,DIR2]...
96 configure and build add-ons in DIR1,DIR2,...
97 search for add-ons if no parameter given],
98 [case "$enableval" in
99 yes) if test "$srcdir" = "."; then
100 add_ons=`echo */configure | sed -e 's!/configure!!g'`
101 else
102 add_ons=`echo $srcdir/*/configure | \
103 sed -e 's!/configure!!g' -e "s!$srcdir/!!g"`
104 fi;;
105 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
106 esac],
107 [add_ons=])
109 AC_CONFIG_SUBDIRS($add_ons)
110 add_ons_pfx=
111 if test x"$add_ons" != x; then
112 for f in $add_ons; do
113 # Test whether such a subdir really exists.
114 if test -d $srcdir/$f; then
115 add_ons_pfx="$add_ons_pfx $f/"
116 else
117 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
118 fi
119 done
120 fi
122 dnl On some platforms we cannot use dynamic loading. We must provide
123 dnl static NSS modules.
124 AC_ARG_ENABLE(static-nss, dnl
125 [ --enable-static-nss build static NSS modules [default=no]],
126 static_nss=$enableval, static_nss=no)
127 if test x"$static_nss" = xyes; then
128 AC_DEFINE(DO_STATIC_NSS)
129 fi
131 AC_ARG_ENABLE(force-install,
132 [ --disable-force-install don't force installation of files from this package,
133 even if they are older than the installed files],
134 force_install=$enableval, force_install=yes)
135 AC_SUBST(force_install)
137 AC_CANONICAL_HOST
139 # The way shlib-versions is used to generate soversions.mk uses a
140 # fairly simplistic model for name recognition that can't distinguish
141 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
142 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
143 # tell. This doesn't get used much beyond that, so it's fairly safe.
144 case "$host_os" in
145 linux*)
146 ;;
147 gnu*)
148 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
149 ;;
150 esac
152 # We keep the original values in `$config_*' and never modify them, so we
153 # can write them unchanged into config.make. Everything else uses
154 # $machine, $vendor, and $os, and changes them whenever convenient.
155 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
157 # Some configurations imply other options.
158 case "$host_os" in
159 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
160 # These systems always use GNU tools.
161 gnu_ld=yes gnu_as=yes ;;
162 esac
163 case "$host_os" in
164 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
165 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
166 ;;
167 gnu* | linux* | sysv4* | solaris2* | irix6*)
168 # These systems (almost) always use the ELF format.
169 elf=yes
170 ;;
171 esac
173 machine=$config_machine
174 vendor=$config_vendor
175 os=$config_os
177 ###
178 ### I put this here to prevent those annoying emails from people who cannot
179 ### read and try to compile glibc on unsupported platforms. --drepper
180 ###
181 ### By using the undocumented --enable-hacker-mode option for configure
182 ### one can skip this test to make the configuration not fail for unsupported
183 ### platforms.
184 ###
185 if test -z "$enable_hacker_mode"; then
186 case "$machine-$host_os" in
187 *-linux* | *-gnu* | arm*-none*)
188 ;;
189 *)
190 echo "*** The GNU C library is currently not available for this platform."
191 echo "*** So far nobody cared to port it and if there is no volunteer it"
192 echo "*** might never happen. So, if you have interest to see glibc on"
193 echo "*** this platform visit"
194 echo "*** http://www.gnu.org/software/libc/porting.html"
195 echo "*** and join the group of porters"
196 exit 1
197 ;;
198 esac
199 fi
201 dnl We need to use [ and ] for other purposes for a while now.
202 changequote(,)dnl
203 # Expand the configuration machine name into a subdirectory by architecture
204 # type and particular chip.
205 case "$machine" in
206 a29k | am29000) base_machine=a29k machine=a29k ;;
207 alpha*) base_machine=alpha machine=alpha/$machine ;;
208 arm*) base_machine=arm machine=arm/$machine ;;
209 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
210 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
211 hppa*) base_machine=hppa machine=hppa/$machine ;;
212 i[3456]86) base_machine=i386 machine=i386/$machine ;;
213 m680?0) base_machine=m68k machine=m68k/$machine ;;
214 m68k) base_machine=m68k machine=m68k/m68020 ;;
215 m88???) base_machine=m88k machine=m88k/$machine ;;
216 m88k) base_machine=m88k machine=m88k/m88100 ;;
217 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
218 mips*) base_machine=mips
219 case "`uname -m`" in
220 IP22) machine=mips/mips3 ;;
221 *) machine=mips/$machine ,,
222 esac ;;
223 sparc | sparcv[67])
224 base_machine=sparc machine=sparc/sparc32 ;;
225 sparcv8 | supersparc | hypersparc)
226 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
227 sparc64 | ultrasparc)
228 base_machine=sparc machine=sparc/sparc64 ;;
229 esac
230 changequote([,])dnl
231 AC_SUBST(base_machine)
233 if test "$base_machine" = "i386"; then
234 AC_DEFINE(USE_REGPARMS)
235 fi
237 # Compute the list of sysdep directories for this configuration.
238 # This can take a while to compute.
239 sysdep_dir=$srcdir/sysdeps
240 AC_MSG_CHECKING(sysdep dirs)
241 dnl We need to use [ and ] for other purposes for a while now.
242 changequote(,)dnl
243 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
244 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
246 case "$os" in
247 gnu*)
248 base_os=mach/hurd ;;
249 netbsd* | 386bsd* | freebsd* | bsdi*)
250 base_os=unix/bsd/bsd4.4 ;;
251 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
252 base_os=unix/bsd ;;
253 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
254 base_os=unix/sysv ;;
255 irix6*)
256 base_os=unix/sysv/irix6/$os ;;
257 solaris[2-9]*)
258 base_os=unix/sysv/sysv4 ;;
259 none)
260 base_os=standalone ;;
261 *)
262 base_os='' ;;
263 esac
265 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
266 tail=$os
267 ostry=$os
268 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
269 ostry="$ostry /$o"
270 tail=$o
271 done
272 o=`echo $tail | sed 's/[0-9]*$//'`
273 if test $o != $tail; then
274 ostry="$ostry /$o"
275 fi
276 # For linux-gnu, try linux-gnu, then linux.
277 o=`echo $tail | sed 's/-.*$//'`
278 if test $o != $tail; then
279 ostry="$ostry /$o"
280 fi
282 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
283 base=
284 tail=$base_os
285 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
286 set $b
287 base="$base /$1"
288 tail="$2"
289 done
291 # For sparc/sparc9, try sparc/sparc9 and then sparc.
292 mach=
293 tail=$machine
294 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
295 set $m
296 # Prepend the machine's FPU directory unless --without-fp.
297 if test "$with_fp" = yes; then
298 mach="$mach /$1/fpu"
299 fi
300 mach="$mach /$1"
301 tail="$2"
302 done
304 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
305 changequote([,])dnl
307 # Find what sysdep directories exist.
308 sysnames=
309 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
310 for d in $add_ons_pfx ''; do
311 for b in $base ''; do
312 for m0 in $mach ''; do
313 for v in /$vendor ''; do
314 test "$v" = / && continue
315 for o in /$ostry ''; do
316 test "$o" = / && continue
317 for m in $mach ''; do
318 if test "$m0$b$v$o$m"; then
319 try="${d}sysdeps$m0$b$v$o$m"
320 test -n "$enable_debug_configure" &&
321 echo "$0 [DEBUG]: try $try" >&2
322 case $try in
323 /*) dest=$try ;;
324 *) dest=$srcdir/$try ;;
325 esac
326 if test -d $dest; then
327 sysnames="$sysnames $try"
328 { test -n "$o" || test -n "$b"; } && os_used=t
329 { test -n "$m" || test -n "$m0"; } && machine_used=t
330 fi
331 fi
332 done
333 done
334 done
335 done
336 done
337 done
338 IFS="$ac_save_ifs"
340 if test -z "$os_used" && test "$os" != none; then
341 AC_MSG_ERROR(Operating system $os is not supported.)
342 fi
343 if test -z "$machine_used" && test "$machine" != none; then
344 AC_MSG_ERROR(The $machine is not supported.)
345 fi
347 # We have now validated the configuration.
350 # If using ELF, look for an `elf' subdirectory of each machine directory.
351 # We prepend these rather than inserting them whereever the machine appears
352 # because things specified by the machine's ELF ABI should override
353 # OS-specific things, and should always be the same for any OS on the
354 # machine (otherwise what's the point of an ABI?).
355 if test "$elf" = yes; then
356 elf_dirs=
357 for d in $add_ons_pfx ''; do
358 case $d in
359 /*) xsrcdir= ;;
360 *) xsrcdir=$srcdir/ ;;
361 esac
362 for m in $mach; do
363 if test -d $xsrcdir${d}sysdeps$m/elf; then
364 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
365 fi
366 done
367 done
368 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
369 fi
372 # Expand the list of system names into a full list of directories
373 # from each element's parent name and Implies file (if present).
374 set $sysnames
375 names=
376 while test $# -gt 0; do
377 name=$1
378 shift
380 case " $names " in *" $name "*)
381 # Already in the list.
382 continue
383 esac
385 # Report each name as we discover it, so there is no long pause in output.
386 echo $ac_n "$name $ac_c" >&AC_FD_MSG
388 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
390 case $name in
391 /*) xsrcdir= ;;
392 *) xsrcdir=$srcdir/ ;;
393 esac
394 test -n "$enable_debug_configure" &&
395 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
397 if test -f $xsrcdir$name/Implies; then
398 # Collect more names from the `Implies' file (removing comments).
399 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
400 implied=
401 for x in $implied_candidate; do
402 if test -d $xsrcdir$name_base/$x; then
403 implied="$implied $name_base/$x";
404 else
405 AC_MSG_WARN($name/Implies specifies nonexistent $x)
406 fi
407 done
408 else
409 implied=
410 fi
412 # Add NAME to the list of names.
413 names="$names $name"
415 # Find the parent of NAME, using the empty string if it has none.
416 changequote(,)dnl
417 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
418 changequote([,])dnl
420 # Add the names implied by NAME, and NAME's parent (if it has one), to
421 # the list of names to be processed (the argument list). We prepend the
422 # implied names to the list and append the parent. We want implied
423 # directories to come before further directories inferred from the
424 # configuration components; this ensures that for sysv4, unix/common
425 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
426 # after sysv4).
427 sysnames="`echo $implied $* $parent`"
428 test -n "$sysnames" && set $sysnames
429 done
431 # Add the default directories.
432 default_sysnames=sysdeps/generic
433 if test "$elf" = yes; then
434 default_sysnames="sysdeps/generic/elf $default_sysnames"
435 fi
436 sysnames="$names $default_sysnames"
437 AC_SUBST(sysnames)
438 # The other names were emitted during the scan.
439 AC_MSG_RESULT($default_sysnames)
442 ### Locate tools.
444 AC_PROG_INSTALL
445 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
446 # The makefiles need to use a different form to find it in $srcdir.
447 INSTALL='\$(..)./install-sh -c'
448 fi
449 AC_PROG_LN_S
451 # These programs are version sensitive.
452 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
453 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
454 [version \([egcstp-]*[0-9.]*\)],
455 [egcs-2.9[1-9].*|egcs-2.90.2[789]|egcs-2.90.[3-9][0-9]|pgcc-2.9[1-9].*|pgcc-2.90.2[789]|pgcc-2.90.[3-9][0-9]|*2.8.[1-9]*|*2.9|*2.9.[0-9]*],
456 critic_missing=t)
457 AC_CHECK_PROG_VER(MAKE, make gmake, --version,
458 [version \([0-9][0-9.]*\), by],
459 [3.75 | 3.76.[1-9]* | 3.7[789]* | 3.[89]*], critic_missing=t)
461 AC_CHECK_PROG_VER(MSGFMT, msgfmt gmsgfmt, --version,
462 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
463 [0.[1-9][0-9].* | [1-9].*], MSGFMT=: aux_missing=t)
464 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
465 [GNU texinfo \([0-9][0-9.]*\)],
466 [3.1[1-9] | 3.[2-9][0-9]], MAKEINFO=: aux_missing=t)
468 if test -n "$critic_missing"; then
469 AC_MSG_ERROR([
470 *** Some critical program is missing or too old.
471 *** Check the INSTALL file for required versions.])
472 fi
474 test -n "$aux_missing" && AC_MSG_WARN([
475 *** An auxiliary program is missing or too old;
476 *** some features will be disabled.
477 *** Check the INSTALL file for required versions.])
479 AC_PROG_CC_LOCAL
480 AC_CANONICAL_BUILD
481 if test $host != $build; then
482 AC_CHECK_PROGS(BUILD_CC, gcc cc)
483 fi
484 AC_SUBST(cross_compiling)
485 AC_PROG_CPP
486 LIBC_PROG_BINUTILS
487 AC_CHECK_TOOL(AR, ar)
488 AC_CHECK_TOOL(RANLIB, ranlib, :)
489 AC_CHECK_TOOL(MIG, mig)
491 # if using special system headers, find out the compiler's sekrit
492 # header directory and add that to the list. NOTE: Only does the right
493 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
494 if test -n "$sysheaders"; then
495 ccheaders=`$CC -print-file-name=include`
496 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
497 fi
498 AC_SUBST(SYSINCLUDES)
500 # check if ranlib is necessary
501 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
502 cat > conftest.c <<EOF
503 int a;
504 char b;
505 void c(void) {}
506 EOF
507 $CC $CFLAGS -c conftest.c
508 $AR cr conftest.a conftest.c
509 cp conftest.a conftest2.a
510 $RANLIB conftest.a
511 if cmp -s conftest.a conftest2.a; then
512 libc_cv_ranlib_necessary=no
513 else
514 libc_cv_ranlib_necessary=yes
515 fi
516 rm -rf conftest*])
517 if test "$libc_cv_ranlib_necessary" = no; then
518 RANLIB=:
519 fi
521 # Test if LD_LIBRARY_PATH contains the notation for the current directory
522 # since this would lead to problems installing/building glibc.
523 # LD_LIBRARY_PATH contains the current directory if one of the following
524 # is true:
525 # - one of the terminals (":" and ";") is the first or last sign
526 # - two terminals occur directly after each other
527 # - the path contains an element with a dot in it
528 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
529 changequote(,)dnl
530 case ${LD_LIBRARY_PATH} in
531 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
532 ld_library_path_setting="contains current directory"
533 ;;
534 *)
535 ld_library_path_setting="ok"
536 ;;
537 esac
538 changequote([,])dnl
539 AC_MSG_RESULT($ld_library_path_setting)
540 if test "$ld_library_path_setting" != "ok"; then
541 AC_MSG_ERROR([
542 *** LD_LIBRARY_PATH shouldn't contain the current directory when
543 *** building glibc. Please change the environment variable
544 *** and run configure again.])
545 fi
547 AC_PATH_PROG(BASH, bash, no)
548 if test "$BASH" != no &&
549 $BASH -c 'test "$BASH_VERSINFO" \
550 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
551 libc_cv_have_bash2=yes
552 else
553 libc_cv_have_bash2=no
554 fi
555 AC_SUBST(libc_cv_have_bash2)
557 dnl We need a ksh compatible shell for tzselect.
558 if test "$BASH" = no; then
559 AC_PATH_PROG(KSH, ksh, no)
560 if test "$KSH" = no; then
561 libc_cv_have_ksh=no
562 else
563 libc_cv_have_ksh=yes
564 fi
565 else
566 KSH="$BASH"
567 AC_SUBST(KSH)
568 libc_cv_have_ksh=yes
569 fi
570 AC_SUBST(libc_cv_have_ksh)
572 AC_PROG_AWK
573 AC_PATH_PROGS(PERL, perl, no)
574 AC_SUBST(PERL)
576 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
577 echo '#include <stddef.h>
578 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
579 if eval "$ac_cpp conftest.c 2>/dev/null" \
580 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
581 libc_cv_signed_size_t=no
582 else
583 libc_cv_signed_size_t=yes
584 fi
585 rm -f conftest*])
586 if test $libc_cv_signed_size_t = yes; then
587 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
588 cat >> confdefs.h <<\EOF
589 #undef __SIZE_TYPE__
590 #define __SIZE_TYPE__ unsigned
591 EOF
592 fi
594 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
595 AC_TRY_COMPILE(dnl
596 [#define __need_size_t
597 #define __need_wchar_t
598 #include <stddef.h>
599 #define __need_NULL
600 #include <stddef.h>], [size_t size; wchar_t wchar;
601 #ifdef offsetof
602 #error stddef.h ignored __need_*
603 #endif
604 if (&size == NULL || &wchar == NULL) abort ();],
605 libc_cv_friendly_stddef=yes,
606 libc_cv_friendly_stddef=no)])
607 if test $libc_cv_friendly_stddef = yes; then
608 config_vars="$config_vars
609 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
610 fi
612 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
613 libc_cv_need_minus_P, [dnl
614 cat > conftest.S <<EOF
615 #include "confdefs.h"
616 /* Nothing whatsoever. */
617 EOF
618 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
619 libc_cv_need_minus_P=no
620 else
621 libc_cv_need_minus_P=yes
622 fi
623 rm -f conftest*])
624 if test $libc_cv_need_minus_P = yes; then
625 config_vars="$config_vars
626 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
627 fi
629 AC_CACHE_CHECK(for assembler global-symbol directive,
630 libc_cv_asm_global_directive, [dnl
631 libc_cv_asm_global_directive=UNKNOWN
632 for ac_globl in .globl .global; do
633 cat > conftest.s <<EOF
634 .text
635 ${ac_globl} foo
636 foo:
637 EOF
638 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
639 libc_cv_asm_global_directive=${ac_globl}
640 fi
641 rm -f conftest*
642 test $libc_cv_asm_global_directive != UNKNOWN && break
643 done])
644 if test $libc_cv_asm_global_directive = UNKNOWN; then
645 AC_MSG_ERROR(cannot determine asm global directive)
646 else
647 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
648 fi
650 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
651 cat > conftest.s <<EOF
652 .text
653 foo:
654 .set glibc_conftest_frobozz,foo
655 $libc_cv_asm_global_directive glibc_conftest_frobozz
656 EOF
657 # The alpha-dec-osf1 assembler gives only a warning for `.set'
658 # (but it doesn't work), so we must do a linking check to be sure.
659 cat > conftest1.c <<\EOF
660 extern int glibc_conftest_frobozz;
661 main () { printf ("%d\n", glibc_conftest_frobozz); }
662 EOF
663 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
664 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
665 libc_cv_asm_set_directive=yes
666 else
667 libc_cv_asm_set_directive=no
668 fi
669 rm -f conftest*])
670 if test $libc_cv_asm_set_directive = yes; then
671 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
672 fi
674 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
675 [cat > conftest.s <<EOF
676 .text
677 _sym:
678 .symver _sym,sym@VERS
679 EOF
680 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
681 libc_cv_asm_symver_directive=yes
682 else
683 libc_cv_asm_symver_directive=no
684 fi
685 rm -f conftest*])
686 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
687 if test $libc_cv_asm_symver_directive = yes; then
688 cat > conftest.s <<EOF
689 .text
690 _sym:
691 .symver _sym,sym@VERS
692 EOF
693 cat > conftest.map <<EOF
694 VERS_1 {
695 global: sym;
696 };
698 VERS_2 {
699 global: sym;
700 } VERS_1;
701 EOF
702 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
703 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
704 -nostartfiles -nostdlib
705 -Wl,--version-script,conftest.map
706 1>&AC_FD_CC]);
707 then
708 libc_cv_ld_version_script_option=yes
709 else
710 libc_cv_ld_version_script_option=no
711 fi
712 else
713 libc_cv_ld_version_script_option=no
714 fi
715 else
716 libc_cv_ld_version_script_option=no
717 fi
718 rm -f conftest*])
719 if test $libc_cv_asm_symver_directive = yes &&
720 test $libc_cv_ld_version_script_option = yes &&
721 test $enable_versioning = yes; then
722 VERSIONING=yes
723 AC_DEFINE(DO_VERSIONING)
724 else
725 VERSIONING=no
726 fi
727 AC_SUBST(VERSIONING)
729 if test $VERSIONING = no; then
730 echo "\
731 *** WARNING: You should not compile GNU libc without versioning. Not using
732 *** versioning will introduce incompatibilities so that old binaries
733 *** will not run anymore.
734 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
735 fi
736 if test $elf = yes; then
737 AC_CACHE_CHECK(for .previous assembler directive,
738 libc_cv_asm_previous_directive, [dnl
739 cat > conftest.s <<EOF
740 .section foo_section
741 .previous
742 EOF
743 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
744 libc_cv_asm_previous_directive=yes
745 else
746 libc_cv_asm_previous_directive=no
747 fi
748 rm -f conftest*])
749 if test $libc_cv_asm_previous_directive = yes; then
750 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
751 else
752 AC_CACHE_CHECK(for .popsection assembler directive,
753 libc_cv_asm_popsection_directive, [dnl
754 cat > conftest.s <<EOF
755 .pushsection foo_section
756 .popsection
757 EOF
758 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
759 libc_cv_asm_popsection_directive=yes
760 else
761 libc_cv_asm_popsection_directive=no
762 fi
763 rm -f conftest*])
764 if test $libc_cv_asm_popsection_directive = yes; then
765 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
766 fi
767 fi
768 fi
770 if test $elf != yes; then
771 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
772 [AC_TRY_COMPILE(, [asm (".section .init");
773 asm (".section .fini");
774 asm (".text");],
775 libc_cv_have_initfini=yes,
776 libc_cv_have_initfini=no)])
777 AC_SUBST(libc_cv_have_initfini)dnl
778 if test $libc_cv_have_initfini = yes; then
779 AC_DEFINE(HAVE_INITFINI)
780 fi
781 fi
783 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
784 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
785 [cat > conftest.$ac_ext <<EOF
786 dnl This sometimes fails to find confdefs.h, for some reason.
787 dnl [#]line __oline__ "[$]0"
788 [#]line __oline__ "configure"
789 #include "confdefs.h"
790 void underscore_test(void) {
791 return; }
792 EOF
793 if AC_TRY_EVAL(ac_compile); then
794 if grep _underscore_test conftest* >/dev/null; then
795 ifelse([$1], , :, [rm -f conftest*
796 $1])
797 else
798 ifelse([$2], , , [rm -f conftest*
799 $2])
800 fi
801 else
802 echo "configure: failed program was:" >&AC_FD_CC
803 cat conftest.$ac_ext >&AC_FD_CC
804 ifelse([$2], , , [rm -f conftest*
805 $2])
806 fi
807 rm -f conftest*])
809 if test $elf = yes; then
810 libc_cv_asm_underscores=no
811 else
812 if test $ac_cv_prog_cc_works = yes; then
813 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
814 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
815 libc_cv_asm_underscores=yes,
816 libc_cv_asm_underscores=no)])
817 else
818 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
819 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
820 libc_cv_asm_underscores=no)])
821 fi
822 fi
823 if test $libc_cv_asm_underscores = no; then
824 AC_DEFINE(NO_UNDERSCORES)
825 fi
827 if test $elf = yes; then
828 libc_cv_weak_symbols=yes
829 fi
831 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
832 [dnl
833 cat > conftest.s <<EOF
834 .text
835 ${libc_cv_asm_global_directive} foo
836 foo:
837 .weak foo
838 .weak bar; bar = foo
839 EOF
840 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
841 libc_cv_asm_weak_directive=yes
842 else
843 libc_cv_asm_weak_directive=no
844 fi
845 rm -f conftest*])
847 if test $libc_cv_asm_weak_directive = no; then
848 AC_CACHE_CHECK(for assembler .weakext directive,
849 libc_cv_asm_weakext_directive,
850 [dnl
851 cat > conftest.s <<EOF
852 .text
853 ${libc_cv_asm_global_directive} foo
854 foo:
855 .weakext bar foo
856 .weakext baz
857 ${libc_cv_asm_global_directive} baz
858 baz:
859 EOF
860 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
861 libc_cv_asm_weakext_directive=yes
862 else
863 libc_cv_asm_weakext_directive=no
864 fi
865 rm -f conftest*])
867 fi # no .weak
869 if test $libc_cv_asm_weak_directive = yes; then
870 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
871 elif test $libc_cv_asm_weakext_directive = yes; then
872 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
873 fi
875 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
876 cat > conftest.c <<\EOF
877 _start () {}
878 int __eh_pc;
879 __throw () {}
880 EOF
881 dnl No \ in command here because it ends up inside ''.
882 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
883 -nostdlib -nostartfiles -Wl,--no-whole-archive
884 -o conftest conftest.c 1>&AC_FD_CC]); then
885 libc_cv_ld_no_whole_archive=yes
886 else
887 libc_cv_ld_no_whole_archive=no
888 fi
889 rm -f conftest*])
890 if test $libc_cv_ld_no_whole_archive = yes; then
891 no_whole_archive=-Wl,--no-whole-archive
892 fi
893 AC_SUBST(no_whole_archive)dnl
895 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
896 cat > conftest.c <<\EOF
897 _start () {}
898 int __eh_pc;
899 __throw () {}
900 EOF
901 dnl No \ in command here because it ends up inside ''.
902 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
903 -nostdlib -nostartfiles -fexceptions
904 -o conftest conftest.c 1>&AC_FD_CC]); then
905 libc_cv_gcc_exceptions=yes
906 else
907 libc_cv_gcc_exceptions=no
908 fi
909 rm -f conftest*])
910 if test $libc_cv_gcc_exceptions = yes; then
911 exceptions=-fexceptions
912 fi
913 AC_SUBST(exceptions)dnl
915 if test "$base_machine" = alpha ; then
916 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
917 cat > conftest.c <<\EOF
918 foo () { }
919 EOF
920 dnl
921 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
922 then
923 libc_cv_gcc_alpha_ng_prefix=yes
924 else
925 libc_cv_gcc_alpha_ng_prefix=no
926 fi
927 rm -f conftest* ])
928 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
929 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
930 else
931 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
932 fi
933 fi
935 if test "$host_cpu" = powerpc ; then
936 # Check for a bug present in at least versions 2.8.x of GCC
937 # and versions 1.0.x of EGCS.
938 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
939 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
940 libc_cv_c_asmcr0_bug='no',
941 libc_cv_c_asmcr0_bug='yes')])
942 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
943 AC_DEFINE(BROKEN_PPC_ASM_CR0)
944 fi
945 fi
947 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
948 [cat > conftest.c <<EOF
949 #line __oline__ "configure"
950 static char __EH_FRAME_BEGIN__[];
951 _start ()
952 {
953 #ifdef CHECK__register_frame
954 __register_frame (__EH_FRAME_BEGIN__);
955 __deregister_frame (__EH_FRAME_BEGIN__);
956 #endif
957 #ifdef CHECK__register_frame_info
958 __register_frame_info (__EH_FRAME_BEGIN__);
959 __deregister_frame_info (__EH_FRAME_BEGIN__);
960 #endif
961 }
962 int __eh_pc;
963 __throw () {}
964 /* FIXME: this is fragile. */
965 malloc () {}
966 strcmp () {}
967 strlen () {}
968 memcpy () {}
969 memset () {}
970 free () {}
971 abort () {}
972 __bzero () {}
973 EOF
974 dnl No \ in command here because it ends up inside ''.
975 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
976 -nostdlib -nostartfiles
977 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
978 libc_cv_gcc_dwarf2_unwind_info=static
979 else
980 libc_cv_gcc_dwarf2_unwind_info=no
981 fi
982 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
983 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
984 -nostdlib -nostartfiles
985 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
986 libc_cv_gcc_dwarf2_unwind_info=yes
987 else
988 libc_cv_gcc_dwarf2_unwind_info=no
989 fi
990 fi
991 rm -f conftest*])
992 case $libc_cv_gcc_dwarf2_unwind_info in
993 yes)
994 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
995 ;;
996 static)
997 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
998 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
999 ;;
1000 esac
1002 ### End of automated tests.
1003 ### Now run sysdeps configure fragments.
1005 # sysdeps configure fragments may set these with files to be linked below.
1006 libc_link_dests=
1007 libc_link_sources=
1009 # They also can set these variables.
1010 ldd_rewrite_script=no
1012 # Iterate over all the sysdep directories we will use, running their
1013 # configure fragments, and looking for a uname implementation.
1014 uname=
1015 for dir in $sysnames; do
1016 case $dir in
1017 /*) dest=$dir ;;
1018 *) dest=$srcdir/$dir ;;
1019 esac
1020 if test -r $dest/configure; then
1021 AC_MSG_RESULT(running configure fragment for $dest)
1022 . $dest/configure
1023 fi
1024 [
1025 if test -z "$uname"; then
1026 if test -r $dest/uname.c ||
1027 test -r $dest/uname.S ||
1028 { test -r $dest/syscalls.list &&
1029 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1030 uname=$dir
1031 fi
1032 fi
1033 ]dnl
1034 done
1036 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1038 # If we will use the generic uname implementation, we must figure out what
1039 # it will say by examining the system, and write the results in config-name.h.
1040 if test "$uname" = "sysdeps/generic"; then
1042 changequote(,)dnl
1043 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1044 changequote([,])dnl
1045 if test $uname_sysname != $config_os; then
1046 config_release=`echo $config_os | sed s/$uname_sysname//`
1047 fi
1048 dnl
1049 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1050 if test -r /vmunix; then
1051 kernel_id=`strings /vmunix | grep UNIX`
1052 elif test -r /dynix; then
1053 kernel_id=`strings /dynix | grep DYNIX`
1054 else
1055 kernel_id=
1056 fi
1057 ])dnl
1059 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1060 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1061 changequote(,)dnl
1062 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1063 changequote([,])dnl
1064 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1065 != x$config_release; then
1066 # The configuration release is a substring of the kernel release.
1067 libc_cv_uname_release=$kernel_release
1068 elif test x$config_release != x; then
1069 libc_cv_uname_release=$config_release
1070 elif test x$kernel_release != x; then
1071 libc_cv_uname_release=$kernel_release
1072 else
1073 libc_cv_uname_release=unknown
1074 fi])
1075 uname_release="$libc_cv_uname_release"
1077 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1078 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1079 changequote(,)dnl
1080 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1081 changequote([,])dnl
1082 if test -n "$kernel_version"; then
1083 libc_cv_uname_version="$kernel_version"
1084 else
1085 libc_cv_uname_version=unknown
1086 fi])
1087 uname_version="$libc_cv_uname_version"
1089 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1090 config_uname=config-name.h:config-name.in
1091 else
1092 # For non-generic uname, we don't need to create config-name.h at all.
1093 config_uname=
1094 fi
1096 AC_MSG_CHECKING(stdio selection)
1097 AC_SUBST(stdio)
1098 case $stdio in
1099 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1100 default) stdio=stdio ;;
1101 esac
1102 AC_MSG_RESULT($stdio)
1104 # Test for old glibc 2.0.x headers so that they can be removed properly
1105 # Search only in includedir.
1106 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1107 if eval test -e "${includedir}/elfclass.h" -a -e "${includedir}/fcntlbits.h"
1108 then
1109 old_glibc_headers=yes
1110 else
1111 old_glibc_headers=no
1112 fi
1113 AC_MSG_RESULT($old_glibc_headers)
1114 if test ${old_glibc_headers} = yes; then
1115 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1116 AC_MSG_WARN(*** be removed.)
1117 fi
1118 AC_SUBST(old_glibc_headers)
1120 AC_SUBST(libc_cv_slibdir)
1121 AC_SUBST(libc_cv_sysconfdir)
1122 AC_SUBST(libc_cv_rootsbindir)
1124 AC_SUBST(has_ldconfig)
1125 AC_SUBST(ldd_rewrite_script)
1127 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1128 if test $gnu_ld = yes; then
1129 AC_DEFINE(HAVE_GNU_LD)
1130 fi
1131 if test $gnu_as = yes; then
1132 AC_DEFINE(HAVE_GNU_AS)
1133 fi
1134 if test $elf = yes; then
1135 AC_DEFINE(HAVE_ELF)
1136 fi
1138 AC_SUBST(static)
1139 AC_SUBST(shared)
1140 if test $shared = default; then
1141 if test $gnu_ld = yes; then
1142 shared=$elf
1143 else
1144 # For now we do not assume shared libs are available. In future more
1145 # tests might become available.
1146 shared=no
1147 fi
1148 fi
1150 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1151 [pic_default=yes
1152 cat > conftest.c <<EOF
1153 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1154 # error PIC is default.
1155 #endif
1156 EOF
1157 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1158 pic_default=no
1159 fi
1160 rm -f conftest.*])
1161 AC_SUBST(pic_default)
1163 AC_SUBST(profile)
1164 AC_SUBST(omitfp)
1165 AC_SUBST(bounded)
1166 AC_SUBST(static_nss)
1167 AC_SUBST(nopic_initfini)
1169 AC_SUBST(DEFINES)
1171 case "$add_ons" in
1172 *door*) linux_doors=yes ;;
1173 *) linux_doors=no ;;
1174 esac
1175 AC_SUBST(linux_doors)
1177 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1178 config_makefile=
1179 else
1180 config_makefile=Makefile
1181 fi
1183 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1184 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1185 AC_SUBST(VERSION)
1186 AC_SUBST(RELEASE)
1188 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1189 case $CONFIG_FILES in *config.make*)
1190 echo "$config_vars" >> config.make;;
1191 esac
1192 test -d bits || mkdir bits], [config_vars='$config_vars'])