| blob | 6d17bb30cbee5bec88e911c225d3e4d8994bf345 |
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)
7 # This will get text that should go into config.make.
8 config_vars=
10 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
11 AC_ARG_WITH(gmp, dnl
12 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
13 [dnl
14 case "$with_gmp" in
15 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
16 ''|no) ;;
17 *) config_vars="$config_vars
18 gmp-srcdir = $withval" ;;
19 esac
20 ])
21 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
22 AC_ARG_WITH(gettext, dnl
23 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
24 [dnl
25 case "$with_gettext" in
26 yes)
27 AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
28 ''|no) ;;
29 *)
30 config_vars="$config_vars
31 gettext-srcdir = $withval" ;;
32 esac
33 ])
35 dnl Arguments to specify presence of other packages/features.
36 AC_ARG_WITH(fp, dnl
37 [ --with-fp if using floating-point hardware [default=yes]],
38 with_fp=$withval, with_fp=yes)
39 AC_ARG_WITH(binutils, dnl
40 --with-binutils=PATH specify location of binutils (as and ld),
41 path_binutils=$withval, path_binutils='')
42 AC_ARG_WITH(elf, dnl
43 --with-elf if using the ELF object format,
44 elf=$withval, elf=no)
45 AC_ARG_WITH(cvs, dnl
46 [ --without-cvs if CVS should not be used],
47 with_cvs=$withval, with_cvs=yes)
48 AC_SUBST(with_cvs)
50 AC_ARG_WITH(headers, dnl
51 [ --with-headers=PATH location of system headers to use
52 [e.g. /usr/src/linux/include]
53 [default=compiler default]],
54 sysheaders=$withval, sysheaders='')
56 AC_ARG_ENABLE(libio, dnl
57 [ --enable-libio build in GNU libio instead of GNU stdio],
58 [if test $enableval = yes; then
59 stdio=libio
60 else
61 stdio=stdio
62 fi],
63 stdio=default)
65 AC_ARG_ENABLE(sanity-checks, dnl
66 [ --disable-sanity-checks really do not use threads (should not be used
67 except in special situations) [default=yes]],
68 enable_sanity=$enableval, enable_sanity=yes)
70 dnl Arguments to enable or disable building the static, shared, profiled,
71 dnl and -fomit-frame-pointer libraries.
72 AC_ARG_ENABLE(static, dnl
73 [ --enable-static build static library [default=yes]],
74 static=$enableval, static=yes)
75 AC_ARG_ENABLE(shared, dnl
76 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
77 shared=$enableval, shared=default)
78 AC_ARG_ENABLE(profile, dnl
79 [ --enable-profile build profiled library [default=yes]],
80 profile=$enableval, profile=yes)
81 AC_ARG_ENABLE(omitfp, dnl
82 [ --enable-omitfp build undebuggable optimized library [default=no]],
83 omitfp=$enableval, omitfp=no)
84 AC_ARG_ENABLE(bounded, dnl
85 [ --enable-bounded build with runtime bounds checking [default=no]],
86 bounded=$enableval, bounded=no)
87 AC_ARG_ENABLE(versioning, dnl
88 [ --disable-versioning do not include versioning information in the
89 library objects [default=yes if supported]],
90 enable_versioning=$enableval, enable_versioning=yes)
92 dnl Generic infrastructure for drop-in additions to libc.
93 AC_ARG_ENABLE(add-ons, dnl
94 [ --enable-add-ons[=DIR1,DIR2]...
95 configure and build add-ons in DIR1,DIR2,...
96 search for add-ons if no parameter given],
97 [case "$enableval" in
98 yes) if test "$srcdir" = "."; then
99 add_ons=`echo */configure | sed -e 's!/configure!!g'`
100 else
101 add_ons=`echo $srcdir/*/configure | \
102 sed -e 's!/configure!!g' -e "s!$srcdir/!!g"`
103 fi;;
104 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
105 esac],
106 [add_ons=])
108 AC_CONFIG_SUBDIRS($add_ons)
109 add_ons_pfx=
110 if test x"$add_ons" != x; then
111 for f in $add_ons; do
112 # Test whether such a subdir really exists.
113 if test -d $srcdir/$f; then
114 add_ons_pfx="$add_ons_pfx $f/"
115 else
116 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
117 fi
118 done
119 fi
121 dnl On some platforms we cannot use dynamic loading. We must provide
122 dnl static NSS modules.
123 AC_ARG_ENABLE(static-nss, dnl
124 [ --enable-static-nss build static NSS modules [default=no]],
125 static_nss=$enableval, static_nss=no)
126 if test x"$static_nss" = xyes; then
127 AC_DEFINE(DO_STATIC_NSS)
128 fi
130 AC_ARG_ENABLE(force-install,
131 [ --enable-force-install force installation of files from this package,
132 even if they are older than the installed files],
133 force_install=$enableval, force_install=yes)
134 AC_SUBST(force_install)
136 AC_CANONICAL_HOST
138 # The way shlib-versions is used to generate soversions.mk uses a
139 # fairly simplistic model for name recognition that can't distinguish
140 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
141 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
142 # tell. This doesn't get used much beyond that, so it's fairly safe.
143 case "$host_os" in
144 linux*)
145 ;;
146 gnu*)
147 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
148 ;;
149 esac
151 ###
152 ### I put this here to prevent those annoying emails from people who cannot
153 ### read and try to compile glibc on unsupported platforms. --drepper
154 ###
155 ### By using the undocumented --enable-hacker-mode option for configure
156 ### one can skip this test to make the configuration not fail for unsupported
157 ### platforms.
158 ###
159 if test -z "$enable_hacker_mode"; then
160 case "$machine-$host_os" in
161 *-linux* | *-gnu* | arm*-none*)
162 ;;
163 *)
164 echo "*** The GNU C library is currently not available for this platform."
165 echo "*** So far nobody cared to port it and if there is no volunteer it"
166 echo "*** might never happen. So, if you have interest to see glibc on"
167 echo "*** this platform visit"
168 echo "*** http://www.gnu.org/software/libc/porting.html"
169 echo "*** and join the group of porters"
170 exit 1
171 ;;
172 esac
173 fi
175 # We keep the original values in `$config_*' and never modify them, so we
176 # can write them unchanged into config.make. Everything else uses
177 # $machine, $vendor, and $os, and changes them whenever convenient.
178 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
180 # Some configurations imply other options.
181 case "$host_os" in
182 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
183 # These systems always use GNU tools.
184 gnu_ld=yes gnu_as=yes ;;
185 esac
186 case "$host_os" in
187 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
188 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
189 ;;
190 gnu* | linux* | sysv4* | solaris2* | irix6*)
191 # These systems (almost) always use the ELF format.
192 elf=yes
193 ;;
194 esac
196 machine=$config_machine
197 vendor=$config_vendor
198 os=$config_os
200 dnl We need to use [ and ] for other purposes for a while now.
201 changequote(,)dnl
202 # Expand the configuration machine name into a subdirectory by architecture
203 # type and particular chip.
204 case "$machine" in
205 a29k | am29000) base_machine=a29k machine=a29k ;;
206 alpha*) base_machine=alpha machine=alpha/$machine ;;
207 arm*) base_machine=arm machine=arm/$machine ;;
208 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
209 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
210 hppa*) base_machine=hppa machine=hppa/$machine ;;
211 i[3456]86) base_machine=i386 machine=i386/$machine ;;
212 m680?0) base_machine=m68k machine=m68k/$machine ;;
213 m68k) base_machine=m68k machine=m68k/m68020 ;;
214 m88???) base_machine=m88k machine=m88k/$machine ;;
215 m88k) base_machine=m88k machine=m88k/m88100 ;;
216 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
217 mips*) base_machine=mips
218 case "`uname -m`" in
219 IP22) machine=mips/mips3 ;;
220 *) machine=mips/$machine ,,
221 esac ;;
222 sparc | sparcv[67])
223 base_machine=sparc machine=sparc/sparc32 ;;
224 sparcv8 | supersparc | hypersparc)
225 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
226 sparc64 | ultrasparc)
227 base_machine=sparc machine=sparc/sparc64 ;;
228 esac
229 changequote([,])dnl
230 AC_SUBST(base_machine)
232 if test "$base_machine" = "i386"; then
233 AC_DEFINE(USE_REGPARMS)
234 fi
236 # Compute the list of sysdep directories for this configuration.
237 # This can take a while to compute.
238 sysdep_dir=$srcdir/sysdeps
239 AC_MSG_CHECKING(sysdep dirs)
240 dnl We need to use [ and ] for other purposes for a while now.
241 changequote(,)dnl
242 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
243 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
245 case "$os" in
246 gnu*)
247 base_os=mach/hurd ;;
248 netbsd* | 386bsd* | freebsd* | bsdi*)
249 base_os=unix/bsd/bsd4.4 ;;
250 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
251 base_os=unix/bsd ;;
252 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
253 base_os=unix/sysv ;;
254 irix6*)
255 base_os=unix/sysv/irix6/$os ;;
256 solaris[2-9]*)
257 base_os=unix/sysv/sysv4 ;;
258 none)
259 base_os=standalone ;;
260 *)
261 base_os='' ;;
262 esac
264 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
265 tail=$os
266 ostry=$os
267 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
268 ostry="$ostry /$o"
269 tail=$o
270 done
271 o=`echo $tail | sed 's/[0-9]*$//'`
272 if test $o != $tail; then
273 ostry="$ostry /$o"
274 fi
275 # For linux-gnu, try linux-gnu, then linux.
276 o=`echo $tail | sed 's/-.*$//'`
277 if test $o != $tail; then
278 ostry="$ostry /$o"
279 fi
281 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
282 base=
283 tail=$base_os
284 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
285 set $b
286 base="$base /$1"
287 tail="$2"
288 done
290 # For sparc/sparc9, try sparc/sparc9 and then sparc.
291 mach=
292 tail=$machine
293 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
294 set $m
295 # Prepend the machine's FPU directory unless --without-fp.
296 if test "$with_fp" = yes; then
297 mach="$mach /$1/fpu"
298 fi
299 mach="$mach /$1"
300 tail="$2"
301 done
303 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
304 changequote([,])dnl
306 # Find what sysdep directories exist.
307 sysnames=
308 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
309 for d in $add_ons_pfx ''; do
310 for b in $base ''; do
311 for m0 in $mach ''; do
312 for v in /$vendor ''; do
313 test "$v" = / && continue
314 for o in /$ostry ''; do
315 test "$o" = / && continue
316 for m in $mach ''; do
317 if test "$m0$b$v$o$m"; then
318 try="${d}sysdeps$m0$b$v$o$m"
319 test -n "$enable_debug_configure" &&
320 echo "$0 [DEBUG]: try $try" >&2
321 case $try in
322 /*) dest=$try ;;
323 *) dest=$srcdir/$try ;;
324 esac
325 if test -d $dest; then
326 sysnames="$sysnames $try"
327 { test -n "$o" || test -n "$b"; } && os_used=t
328 { test -n "$m" || test -n "$m0"; } && machine_used=t
329 fi
330 fi
331 done
332 done
333 done
334 done
335 done
336 done
337 IFS="$ac_save_ifs"
339 if test -z "$os_used" && test "$os" != none; then
340 AC_MSG_ERROR(Operating system $os is not supported.)
341 fi
342 if test -z "$machine_used" && test "$machine" != none; then
343 AC_MSG_ERROR(The $machine is not supported.)
344 fi
346 # We have now validated the configuration.
349 # If using ELF, look for an `elf' subdirectory of each machine directory.
350 # We prepend these rather than inserting them whereever the machine appears
351 # because things specified by the machine's ELF ABI should override
352 # OS-specific things, and should always be the same for any OS on the
353 # machine (otherwise what's the point of an ABI?).
354 if test "$elf" = yes; then
355 elf_dirs=
356 for d in $add_ons_pfx ''; do
357 case $d in
358 /*) xsrcdir= ;;
359 *) xsrcdir=$srcdir/ ;;
360 esac
361 for m in $mach; do
362 if test -d $xsrcdir${d}sysdeps$m/elf; then
363 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
364 fi
365 done
366 done
367 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
368 fi
371 # Expand the list of system names into a full list of directories
372 # from each element's parent name and Implies file (if present).
373 set $sysnames
374 names=
375 while test $# -gt 0; do
376 name=$1
377 shift
379 case " $names " in *" $name "*)
380 # Already in the list.
381 continue
382 esac
384 # Report each name as we discover it, so there is no long pause in output.
385 echo $ac_n "$name $ac_c" >&AC_FD_MSG
387 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
389 case $name in
390 /*) xsrcdir= ;;
391 *) xsrcdir=$srcdir/ ;;
392 esac
393 test -n "$enable_debug_configure" &&
394 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
396 if test -f $xsrcdir$name/Implies; then
397 # Collect more names from the `Implies' file (removing comments).
398 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
399 implied=
400 for x in $implied_candidate; do
401 if test -d $xsrcdir$name_base/$x; then
402 implied="$implied $name_base/$x";
403 else
404 AC_MSG_WARN($name/Implies specifies nonexistent $x)
405 fi
406 done
407 else
408 implied=
409 fi
411 # Add NAME to the list of names.
412 names="$names $name"
414 # Find the parent of NAME, using the empty string if it has none.
415 changequote(,)dnl
416 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
417 changequote([,])dnl
419 # Add the names implied by NAME, and NAME's parent (if it has one), to
420 # the list of names to be processed (the argument list). We prepend the
421 # implied names to the list and append the parent. We want implied
422 # directories to come before further directories inferred from the
423 # configuration components; this ensures that for sysv4, unix/common
424 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
425 # after sysv4).
426 sysnames="`echo $implied $* $parent`"
427 test -n "$sysnames" && set $sysnames
428 done
430 # Add the default directories.
431 sysnames="$names sysdeps/generic"
432 AC_SUBST(sysnames)
433 # The other names were emitted during the scan.
434 AC_MSG_RESULT(sysdeps/generic)
437 ### Locate tools.
439 AC_PROG_INSTALL
440 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
441 # The makefiles need to use a different form to find it in $srcdir.
442 INSTALL='\$(..)./install-sh -c'
443 fi
444 AC_PROG_LN_S
446 # These programs are version sensitive.
447 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
448 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
449 [version \([egcst0-9.-]*\)],
450 [egcs-2.91.*|egcs-2.90.2[789]|egcs-2.90.[3-9][0-9]|*2.8.[1-9]*|*2.9.[0-9]*],
451 critic_missing=t)
452 AC_CHECK_PROG_VER(MAKE, make gmake, --version,
453 [version \([0-9][0-9.]*\), by],
454 [3.75 | 3.76.[1-9] | 3.7[789]* | 3.[89]*], critic_missing=t)
456 AC_CHECK_PROG_VER(MSGFMT, msgfmt gmsgfmt, --version,
457 [GNU gettext.*\([0-9][0-9]*\.[0-9]*\)],
458 [0.[1-9][0-9] | [1-9].*], MSGFMT=: aux_missing=t)
459 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
460 [GNU texinfo \([0-9][0-9.]*\)],
461 [3.1[1-9] | 3.[2-9][0-9]], MAKEINFO=: aux_missing=t)
463 if test -n "$critic_missing"; then
464 AC_MSG_ERROR([
465 *** Some critical program is missing or too old.
466 *** Check the INSTALL file for required versions.])
467 fi
469 test -n "$aux_missing" && AC_MSG_WARN([
470 *** An auxiliary program is missing or too old;
471 *** some features will be disabled.
472 *** Check the INSTALL file for required versions.])
474 AC_PROG_CC_LOCAL
475 AC_CANONICAL_BUILD
476 if test $host != $build; then
477 AC_CHECK_PROGS(BUILD_CC, gcc cc)
478 fi
479 AC_SUBST(cross_compiling)
480 AC_PROG_CPP
481 LIBC_PROG_BINUTILS
482 AC_CHECK_TOOL(AR, ar)
483 AC_CHECK_TOOL(RANLIB, ranlib, :)
484 AC_CHECK_TOOL(MIG, mig)
486 # if using special system headers, find out the compiler's sekrit
487 # header directory and add that to the list. NOTE: Only does the right
488 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
489 if test -n "$sysheaders"; then
490 ccheaders=`$CC -print-file-name=include`
491 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
492 fi
493 AC_SUBST(SYSINCLUDES)
495 # check if ar takes S
496 AC_CACHE_CHECK(for ar S, libc_cv_ar_S, [dnl
497 tmpo=$$.o
498 tmplib=lib$$.a
499 rm -f $tmpo $tmplib
500 touch $tmpo
501 if AC_TRY_COMMAND([${AR-ar} rcuS $tmplib $tmpo > /dev/null 2>&1]); then
502 libc_cv_ar_S=yes
503 else
504 libc_cv_ar_S=no
505 fi
506 rm -f $tmpo $tmplib])
507 AC_SUBST(libc_cv_ar_S)dnl
509 # Test if LD_LIBRARY_PATH contains the notation for the current directory
510 # since this would lead to problems installing/building glibc.
511 # LD_LIBRARY_PATH contains the current directory if one of the following
512 # is true:
513 # - one of the terminals (":" and ";") is the first or last sign
514 # - two terminals occur directly after each other
515 # - the path contains an element with a dot in it
516 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
517 changequote(,)dnl
518 case ${LD_LIBRARY_PATH} in
519 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
520 ld_library_path_setting="contains current directory"
521 ;;
522 *)
523 ld_library_path_setting="ok"
524 ;;
525 esac
526 changequote([,])dnl
527 AC_MSG_RESULT($ld_library_path_setting)
528 if test "$ld_library_path_setting" != "ok"; then
529 AC_MSG_ERROR([
530 *** LD_LIBRARY_PATH shouldn't contain the current directory when
531 *** building glibc. Please change the environment variable
532 *** and run configure again.])
533 fi
535 AC_PATH_PROG(BASH, bash, no)
536 if test "$BASH" != no &&
537 $BASH -c 'test "$BASH_VERSINFO" \
538 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
539 libc_cv_have_bash2=yes
540 else
541 libc_cv_have_bash2=no
542 fi
543 AC_SUBST(libc_cv_have_bash2)
545 dnl We need a ksh compatible shell for tzselect.
546 if test "$BASH" = no; then
547 AC_PATH_PROG(KSH, ksh, no)
548 if test "$KSH" = no; then
549 libc_cv_have_ksh=no
550 else
551 libc_cv_have_ksh=yes
552 fi
553 else
554 KSH="$BASH"
555 AC_SUBST(KSH)
556 libc_cv_have_ksh=yes
557 fi
558 AC_SUBST(libc_cv_have_ksh)
560 AC_PATH_PROGS(PERL, perl, no)
561 AC_SUBST(PERL)
563 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
564 echo '#include <stddef.h>
565 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
566 if eval "$ac_cpp conftest.c 2>/dev/null" \
567 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
568 libc_cv_signed_size_t=no
569 else
570 libc_cv_signed_size_t=yes
571 fi
572 rm -f conftest*])
573 if test $libc_cv_signed_size_t = yes; then
574 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
575 cat >> confdefs.h <<\EOF
576 #undef __SIZE_TYPE__
577 #define __SIZE_TYPE__ unsigned
578 EOF
579 fi
581 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
582 AC_TRY_COMPILE(dnl
583 [#define __need_size_t
584 #define __need_wchar_t
585 #include <stddef.h>
586 #define __need_NULL
587 #include <stddef.h>], [size_t size; wchar_t wchar;
588 #ifdef offsetof
589 #error stddef.h ignored __need_*
590 #endif
591 if (&size == NULL || &wchar == NULL) abort ();],
592 libc_cv_friendly_stddef=yes,
593 libc_cv_friendly_stddef=no)])
594 if test $libc_cv_friendly_stddef = yes; then
595 config_vars="$config_vars
596 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
597 fi
599 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
600 libc_cv_need_minus_P, [dnl
601 cat > conftest.S <<EOF
602 #include "confdefs.h"
603 /* Nothing whatsoever. */
604 EOF
605 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
606 libc_cv_need_minus_P=no
607 else
608 libc_cv_need_minus_P=yes
609 fi
610 rm -f conftest*])
611 if test $libc_cv_need_minus_P = yes; then
612 config_vars="$config_vars
613 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
614 fi
616 AC_CACHE_CHECK(for assembler global-symbol directive,
617 libc_cv_asm_global_directive, [dnl
618 libc_cv_asm_global_directive=UNKNOWN
619 for ac_globl in .globl .global; do
620 cat > conftest.s <<EOF
621 .text
622 ${ac_globl} foo
623 foo:
624 EOF
625 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
626 libc_cv_asm_global_directive=${ac_globl}
627 fi
628 rm -f conftest*
629 test $libc_cv_asm_global_directive != UNKNOWN && break
630 done])
631 if test $libc_cv_asm_global_directive = UNKNOWN; then
632 AC_MSG_ERROR(cannot determine asm global directive)
633 else
634 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
635 fi
637 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
638 cat > conftest.s <<EOF
639 .text
640 foo:
641 .set glibc_conftest_frobozz,foo
642 $libc_cv_asm_global_directive glibc_conftest_frobozz
643 EOF
644 # The alpha-dec-osf1 assembler gives only a warning for `.set'
645 # (but it doesn't work), so we must do a linking check to be sure.
646 cat > conftest1.c <<\EOF
647 extern int glibc_conftest_frobozz;
648 main () { printf ("%d\n", glibc_conftest_frobozz); }
649 EOF
650 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
651 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
652 libc_cv_asm_set_directive=yes
653 else
654 libc_cv_asm_set_directive=no
655 fi
656 rm -f conftest*])
657 if test $libc_cv_asm_set_directive = yes; then
658 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
659 fi
661 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
662 [cat > conftest.s <<EOF
663 .text
664 _sym:
665 .symver _sym,sym@VERS
666 EOF
667 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
668 libc_cv_asm_symver_directive=yes
669 else
670 libc_cv_asm_symver_directive=no
671 fi
672 rm -f conftest*])
673 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
674 if test $libc_cv_asm_symver_directive = yes; then
675 cat > conftest.s <<EOF
676 .text
677 _sym:
678 .symver _sym,sym@VERS
679 EOF
680 cat > conftest.map <<EOF
681 VERS_1 {
682 global: sym;
683 };
685 VERS_2 {
686 global: sym;
687 } VERS_1;
688 EOF
689 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
690 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
691 -nostartfiles -nostdlib
692 -Wl,--version-script,conftest.map
693 1>&AC_FD_CC]);
694 then
695 libc_cv_ld_version_script_option=yes
696 else
697 libc_cv_ld_version_script_option=no
698 fi
699 else
700 libc_cv_ld_version_script_option=no
701 fi
702 else
703 libc_cv_ld_version_script_option=no
704 fi
705 rm -f conftest*])
706 if test $libc_cv_asm_symver_directive = yes &&
707 test $libc_cv_ld_version_script_option = yes &&
708 test $enable_versioning = yes; then
709 VERSIONING=yes
710 AC_DEFINE(DO_VERSIONING)
711 else
712 VERSIONING=no
713 fi
714 AC_SUBST(VERSIONING)
716 if test $VERSIONING = no; then
717 echo "\
718 *** WARNING: You should not compile GNU libc without versioning. Not using
719 *** versioning will introduce incompatibilities so that old binaries
720 *** will not run anymore.
721 *** For versioning you need recent binutils (binutils-2.8.1.0.17 or newer)."
722 fi
723 if test $elf = yes; then
724 AC_CACHE_CHECK(for .previous assembler directive,
725 libc_cv_asm_previous_directive, [dnl
726 cat > conftest.s <<EOF
727 .section foo_section
728 .previous
729 EOF
730 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
731 libc_cv_asm_previous_directive=yes
732 else
733 libc_cv_asm_previous_directive=no
734 fi
735 rm -f conftest*])
736 if test $libc_cv_asm_previous_directive = yes; then
737 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
738 else
739 AC_CACHE_CHECK(for .popsection assembler directive,
740 libc_cv_asm_popsection_directive, [dnl
741 cat > conftest.s <<EOF
742 .pushsection foo_section
743 .popsection
744 EOF
745 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
746 libc_cv_asm_popsection_directive=yes
747 else
748 libc_cv_asm_popsection_directive=no
749 fi
750 rm -f conftest*])
751 if test $libc_cv_asm_popsection_directive = yes; then
752 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
753 fi
754 fi
755 fi
757 if test $elf != yes; then
758 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
759 [AC_TRY_COMPILE(, [asm (".section .init");
760 asm (".section .fini");
761 asm (".text");],
762 libc_cv_have_initfini=yes,
763 libc_cv_have_initfini=no)])
764 AC_SUBST(libc_cv_have_initfini)dnl
765 if test $libc_cv_have_initfini = yes; then
766 AC_DEFINE(HAVE_INITFINI)
767 fi
768 fi
770 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
771 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
772 [cat > conftest.$ac_ext <<EOF
773 dnl This sometimes fails to find confdefs.h, for some reason.
774 dnl [#]line __oline__ "[$]0"
775 [#]line __oline__ "configure"
776 #include "confdefs.h"
777 void underscore_test(void) {
778 return; }
779 EOF
780 if AC_TRY_EVAL(ac_compile); then
781 if grep _underscore_test conftest* >/dev/null; then
782 ifelse([$1], , :, [rm -f conftest*
783 $1])
784 else
785 ifelse([$2], , , [rm -f conftest*
786 $2])
787 fi
788 else
789 echo "configure: failed program was:" >&AC_FD_CC
790 cat conftest.$ac_ext >&AC_FD_CC
791 ifelse([$2], , , [rm -f conftest*
792 $2])
793 fi
794 rm -f conftest*])
796 if test $elf = yes; then
797 libc_cv_asm_underscores=no
798 else
799 if test $ac_cv_prog_cc_works = yes; then
800 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
801 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
802 libc_cv_asm_underscores=yes,
803 libc_cv_asm_underscores=no)])
804 else
805 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
806 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
807 libc_cv_asm_underscores=no)])
808 fi
809 fi
810 if test $libc_cv_asm_underscores = no; then
811 AC_DEFINE(NO_UNDERSCORES)
812 fi
814 if test $elf = yes; then
815 libc_cv_weak_symbols=yes
816 fi
818 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
819 [dnl
820 cat > conftest.s <<EOF
821 .text
822 ${libc_cv_asm_global_directive} foo
823 foo:
824 .weak foo
825 .weak bar; bar = foo
826 EOF
827 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
828 libc_cv_asm_weak_directive=yes
829 else
830 libc_cv_asm_weak_directive=no
831 fi
832 rm -f conftest*])
834 if test $libc_cv_asm_weak_directive = no; then
835 AC_CACHE_CHECK(for assembler .weakext directive,
836 libc_cv_asm_weakext_directive,
837 [dnl
838 cat > conftest.s <<EOF
839 .text
840 ${libc_cv_asm_global_directive} foo
841 foo:
842 .weakext bar foo
843 .weakext baz
844 ${libc_cv_asm_global_directive} baz
845 baz:
846 EOF
847 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
848 libc_cv_asm_weakext_directive=yes
849 else
850 libc_cv_asm_weakext_directive=no
851 fi
852 rm -f conftest*])
854 fi # no .weak
856 if test $libc_cv_asm_weak_directive = yes; then
857 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
858 elif test $libc_cv_asm_weakext_directive = yes; then
859 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
860 fi
862 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
863 cat > conftest.c <<\EOF
864 _start () {}
865 int __eh_pc;
866 __throw () {}
867 EOF
868 dnl No \ in command here because it ends up inside ''.
869 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
870 -nostdlib -nostartfiles -Wl,--no-whole-archive
871 -o conftest conftest.c 1>&AC_FD_CC]); then
872 libc_cv_ld_no_whole_archive=yes
873 else
874 libc_cv_ld_no_whole_archive=no
875 fi
876 rm -f conftest*])
877 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
879 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
880 cat > conftest.c <<\EOF
881 _start () {}
882 int __eh_pc;
883 __throw () {}
884 EOF
885 dnl No \ in command here because it ends up inside ''.
886 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
887 -nostdlib -nostartfiles -fno-exceptions
888 -o conftest conftest.c 1>&AC_FD_CC]); then
889 libc_cv_gcc_no_exceptions=yes
890 else
891 libc_cv_gcc_no_exceptions=no
892 fi
893 rm -f conftest*])
894 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
896 if test "$base_machine" = alpha ; then
897 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
898 cat > conftest.c <<\EOF
899 foo () { }
900 EOF
901 dnl
902 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
903 then
904 libc_cv_gcc_alpha_ng_prefix=yes
905 else
906 libc_cv_gcc_alpha_ng_prefix=no
907 fi
908 rm -f conftest* ])
909 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
910 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
911 else
912 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
913 fi
914 fi
916 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
917 [cat > conftest.c <<EOF
918 #line __oline__ "configure"
919 static char __EH_FRAME_BEGIN__[];
920 _start ()
921 {
922 #ifdef CHECK__register_frame
923 __register_frame (__EH_FRAME_BEGIN__);
924 __deregister_frame (__EH_FRAME_BEGIN__);
925 #endif
926 #ifdef CHECK__register_frame_info
927 __register_frame_info (__EH_FRAME_BEGIN__);
928 __deregister_frame_info (__EH_FRAME_BEGIN__);
929 #endif
930 }
931 int __eh_pc;
932 __throw () {}
933 /* FIXME: this is fragile. */
934 malloc () {}
935 strcmp () {}
936 strlen () {}
937 memcpy () {}
938 memset () {}
939 free () {}
940 abort () {}
941 __bzero () {}
942 EOF
943 dnl No \ in command here because it ends up inside ''.
944 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
945 -nostdlib -nostartfiles
946 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
947 libc_cv_gcc_dwarf2_unwind_info=static
948 else
949 libc_cv_gcc_dwarf2_unwind_info=no
950 fi
951 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
952 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
953 -nostdlib -nostartfiles
954 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
955 libc_cv_gcc_dwarf2_unwind_info=yes
956 else
957 libc_cv_gcc_dwarf2_unwind_info=no
958 fi
959 fi
960 rm -f conftest*])
961 case $libc_cv_gcc_dwarf2_unwind_info in
962 yes)
963 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
964 ;;
965 static)
966 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
967 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
968 ;;
969 esac
971 ### End of automated tests.
972 ### Now run sysdeps configure fragments.
974 # sysdeps configure fragments may set these with files to be linked below.
975 libc_link_dests=
976 libc_link_sources=
978 # They also can set these variables.
979 ldd_rewrite_script=no
981 # Iterate over all the sysdep directories we will use, running their
982 # configure fragments, and looking for a uname implementation.
983 uname=
984 for dir in $sysnames; do
985 case $dir in
986 /*) dest=$dir ;;
987 *) dest=$srcdir/$dir ;;
988 esac
989 if test -r $dest/configure; then
990 AC_MSG_RESULT(running configure fragment for $dest)
991 . $dest/configure
992 fi
993 [
994 if test -z "$uname"; then
995 if test -r $dest/uname.c ||
996 test -r $dest/uname.S ||
997 { test -r $dest/syscalls.list &&
998 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
999 uname=$dir
1000 fi
1001 fi
1002 ]dnl
1003 done
1005 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1007 # If we will use the generic uname implementation, we must figure out what
1008 # it will say by examining the system, and write the results in config-name.h.
1009 if test "$uname" = "sysdeps/generic"; then
1011 changequote(,)dnl
1012 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1013 changequote([,])dnl
1014 if test $uname_sysname != $config_os; then
1015 config_release=`echo $config_os | sed s/$uname_sysname//`
1016 fi
1017 dnl
1018 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1019 if test -r /vmunix; then
1020 kernel_id=`strings /vmunix | grep UNIX`
1021 elif test -r /dynix; then
1022 kernel_id=`strings /dynix | grep DYNIX`
1023 else
1024 kernel_id=
1025 fi
1026 ])dnl
1028 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1029 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1030 changequote(,)dnl
1031 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1032 changequote([,])dnl
1033 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1034 != x$config_release; then
1035 # The configuration release is a substring of the kernel release.
1036 libc_cv_uname_release=$kernel_release
1037 elif test x$config_release != x; then
1038 libc_cv_uname_release=$config_release
1039 elif test x$kernel_release != x; then
1040 libc_cv_uname_release=$kernel_release
1041 else
1042 libc_cv_uname_release=unknown
1043 fi])
1044 uname_release="$libc_cv_uname_release"
1046 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1047 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1048 changequote(,)dnl
1049 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1050 changequote([,])dnl
1051 if test -n "$kernel_version"; then
1052 libc_cv_uname_version="$kernel_version"
1053 else
1054 libc_cv_uname_version=unknown
1055 fi])
1056 uname_version="$libc_cv_uname_version"
1058 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1059 config_uname=config-name.h:config-name.in
1060 else
1061 # For non-generic uname, we don't need to create config-name.h at all.
1062 config_uname=
1063 fi
1065 AC_MSG_CHECKING(stdio selection)
1066 AC_SUBST(stdio)
1067 case $stdio in
1068 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1069 default) stdio=stdio ;;
1070 esac
1071 AC_MSG_RESULT($stdio)
1073 AC_MSG_CHECKING(ldap selection)
1074 AC_SUBST(LDAP)
1075 case $add_ons in
1076 *ldap*)
1077 ldap=yes
1078 LDAP=ldap ;;
1079 *) ldap=no
1080 LDAP= ;;
1081 esac
1082 AC_MSG_RESULT($ldap)
1084 AC_SUBST(libc_cv_slibdir)
1085 AC_SUBST(libc_cv_sysconfdir)
1086 AC_SUBST(libc_cv_rootsbindir)
1088 AC_SUBST(has_ldconfig)
1089 AC_SUBST(ldd_rewrite_script)
1091 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1092 if test $gnu_ld = yes; then
1093 AC_DEFINE(HAVE_GNU_LD)
1094 fi
1095 if test $gnu_as = yes; then
1096 AC_DEFINE(HAVE_GNU_AS)
1097 fi
1098 if test $elf = yes; then
1099 AC_DEFINE(HAVE_ELF)
1100 fi
1102 AC_SUBST(static)
1103 AC_SUBST(shared)
1104 if test $shared = default; then
1105 if test $gnu_ld = yes; then
1106 shared=$elf
1107 else
1108 # For now we do not assume shared libs are available. In future more
1109 # tests might become available.
1110 shared=no
1111 fi
1112 fi
1114 dnl We must not allow compilation without static library on some platforms.
1115 if test $static = no && test $shared = yes; then
1116 case "$host_os" in
1117 linux* | gnu*)
1118 AC_MSG_ERROR([
1119 *** You must compile with support for the static library since the shared
1120 *** library uses it. Restart configure without \`--disable-static'.])
1121 ;;
1122 *)
1123 ;;
1124 esac
1125 fi
1127 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1128 [pic_default=yes
1129 cat > conftest.c <<EOF
1130 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1131 # error PIC is default.
1132 #endif
1133 EOF
1134 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1135 pic_default=no
1136 fi
1137 rm -f conftest.*])
1138 AC_SUBST(pic_default)
1140 AC_SUBST(profile)
1141 AC_SUBST(omitfp)
1142 AC_SUBST(bounded)
1143 AC_SUBST(static_nss)
1144 AC_SUBST(nopic_initfini)
1146 AC_SUBST(DEFINES)
1148 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1149 config_makefile=
1150 else
1151 config_makefile=Makefile
1152 fi
1154 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
1155 AC_SUBST(VERSION)
1157 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1158 [echo '$config_vars' >> config.make; test -d bits || mkdir bits])