| blob | 43b731d5d69f9de680eecbdb8ac63e93fb78f8ae |
1 dnl Process this file with autoconf to produce a configure script.
2 AC_REVISION([$CVSid$])
3 AC_PREREQ(2.13)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 = $withval" ;;
20 esac
21 ])
22 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
23 AC_ARG_WITH(gd, dnl
24 --with-gd=DIR find libgd include dir and library with prefix DIR,
25 [dnl
26 case "$with_gd" in
27 yes|''|no) ;;
28 *) libgd_include="-I$withval/include"
29 libgd_ldflags="-L$withval/lib" ;;
30 esac
31 ])
32 AC_ARG_WITH(gd-include, dnl
33 --with-gd-include=DIR find libgd include files in DIR,
34 [dnl
35 case "$with_gd_include" in
36 ''|no) ;;
37 *) libgd_include="-I$withval" ;;
38 esac
39 ])
40 AC_ARG_WITH(gd-lib, dnl
41 --with-gd-lib=DIR find libgd library files in DIR,
42 [dnl
43 case "$with_gd_lib" in
44 ''|no) ;;
45 *) libgd_ldflags="-L$withval" ;;
46 esac
47 ])
49 if test -n "$libgd_include"; then
50 config_vars="$config_vars
51 CFLAGS-memusagestat.c = $libgd_include"
52 fi
53 if test -n "$libgd_ldflags"; then
54 config_vars="$config_vars
55 libgd-LDFLAGS = $libgd_ldflags"
56 fi
58 dnl Arguments to specify presence of other packages/features.
59 AC_ARG_WITH(fp, dnl
60 [ --with-fp if using floating-point hardware [default=yes]],
61 with_fp=$withval, with_fp=yes)
62 AC_ARG_WITH(binutils, dnl
63 --with-binutils=PATH specify location of binutils (as and ld),
64 path_binutils=$withval, path_binutils='')
65 AC_ARG_WITH(elf, dnl
66 --with-elf if using the ELF object format,
67 elf=$withval, elf=no)
68 AC_ARG_WITH(cvs, dnl
69 [ --without-cvs if CVS should not be used],
70 with_cvs=$withval, with_cvs=yes)
71 if test "$with_cvs" = yes; then
72 if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
73 then
74 with_cvs=no
75 fi
76 fi
77 AC_SUBST(with_cvs)
79 AC_ARG_WITH(headers, dnl
80 [ --with-headers=PATH location of system headers to use
81 [e.g. /usr/src/linux/include]
82 [default=compiler default]],
83 sysheaders=$withval, sysheaders='')
85 AC_ARG_ENABLE(libio, dnl
86 [ --enable-libio build in GNU libio instead of GNU stdio],
87 [if test $enableval = yes; then
88 stdio=libio
89 else
90 stdio=stdio
91 fi],
92 stdio=default)
94 AC_ARG_ENABLE(sanity-checks, dnl
95 [ --disable-sanity-checks really do not use threads (should not be used
96 except in special situations) [default=yes]],
97 enable_sanity=$enableval, enable_sanity=yes)
99 dnl Arguments to enable or disable building the static, shared, profiled,
100 dnl and -fomit-frame-pointer libraries.
101 dnl I've disabled this for now since we cannot build glibc without static
102 dnl libraries built in the moment.
103 dnl AC_ARG_ENABLE(static, dnl
104 dnl [ --enable-static build static library [default=yes]],
105 dnl static=$enableval, static=yes)
106 static=yes
107 AC_ARG_ENABLE(shared, dnl
108 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
109 shared=$enableval, shared=default)
110 AC_ARG_ENABLE(profile, dnl
111 [ --enable-profile build profiled library [default=yes]],
112 profile=$enableval, profile=yes)
113 AC_ARG_ENABLE(omitfp, dnl
114 [ --enable-omitfp build undebuggable optimized library [default=no]],
115 omitfp=$enableval, omitfp=no)
116 AC_ARG_ENABLE(bounded, dnl
117 [ --enable-bounded build with runtime bounds checking [default=no]],
118 bounded=$enableval, bounded=no)
119 AC_ARG_ENABLE(versioning, dnl
120 [ --disable-versioning do not include versioning information in the
121 library objects [default=yes if supported]],
122 enable_versioning=$enableval, enable_versioning=yes)
124 AC_ARG_ENABLE(oldest-abi, dnl
125 [ --enable-oldest-abi=ABI configure the oldest ABI supported [e.g. 2.2]
126 [default=glibc default]],
127 oldest_abi=$enableval, oldest_abi=no)
128 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
129 oldest_abi=default
130 else
131 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
132 fi
133 AC_SUBST(oldest_abi)
135 dnl Generic infrastructure for drop-in additions to libc.
136 AC_ARG_ENABLE(add-ons, dnl
137 [ --enable-add-ons[=DIR1,DIR2]...
138 configure and build add-ons in DIR1,DIR2,...
139 search for add-ons if no parameter given],
140 [case "$enableval" in
141 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
142 test "$add_ons" = "*" && add_ons= ;;
143 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
144 esac],
145 [add_ons=])
147 AC_CONFIG_SUBDIRS($add_ons)
148 add_ons_pfx=
149 if test x"$add_ons" != x; then
150 for f in $add_ons; do
151 # Some sanity checks
152 if test "$f" = "crypt"; then
153 AC_MSG_ERROR([
154 *** It seems that you're using an old \`crypt' add-on. crypt is now
155 *** part of glibc and using the old add-on will not work with this
156 *** release. Start again with fresh sources and without the old
157 *** \`crypt' add-on.])
158 fi
159 if test "$f" = "localedata"; then
160 AC_MSG_ERROR([
161 *** It seems that you're using an old \`localedata' add-on. localedata
162 *** is now part of glibc and using the old add-on will not work with
163 *** this release. Start again with fresh sources and without the old
164 *** \`localedata' add-on.])
165 fi
166 # Test whether such a subdir really exists.
167 if test -d $srcdir/$f; then
168 add_ons_pfx="$add_ons_pfx $f/"
169 else
170 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
171 fi
172 done
173 fi
175 dnl On some platforms we cannot use dynamic loading. We must provide
176 dnl static NSS modules.
177 AC_ARG_ENABLE(static-nss, dnl
178 [ --enable-static-nss build static NSS modules [default=no]],
179 static_nss=$enableval, static_nss=no)
180 if test x"$static_nss" = xyes; then
181 AC_DEFINE(DO_STATIC_NSS)
182 fi
184 AC_ARG_ENABLE(force-install,
185 [ --disable-force-install don't force installation of files from this package,
186 even if they are older than the installed files],
187 force_install=$enableval, force_install=yes)
188 AC_SUBST(force_install)
190 dnl On some platforms we allow dropping compatibility with all kernel
191 dnl versions.
192 AC_ARG_ENABLE(kernel,
193 [ --enable-kernel=VERSION compile for compatibility with kernel not older
194 than VERSION],
195 minimum_kernel=$enableval)
196 dnl Prevent unreasonable values.
197 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
198 # Better nothing than this.
199 minimum_kernel=""
200 else
201 if test "$minimum_kernel" = current; then
202 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
203 fi
204 fi
206 dnl For the development we sometimes want gcc to issue even more warnings.
207 dnl This is not the default since many of the extra warnings are not
208 dnl appropriate.
209 AC_ARG_ENABLE(all-warnings,
210 [ --enable-all-warnings enable all useful warnings gcc can issue],
211 all_warnings=$enableval)
212 AC_SUBST(all_warnings)
214 AC_CANONICAL_HOST
216 # The way shlib-versions is used to generate soversions.mk uses a
217 # fairly simplistic model for name recognition that can't distinguish
218 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
219 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
220 # tell. This doesn't get used much beyond that, so it's fairly safe.
221 case "$host_os" in
222 linux*)
223 ;;
224 gnu*)
225 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
226 ;;
227 esac
229 # We keep the original values in `$config_*' and never modify them, so we
230 # can write them unchanged into config.make. Everything else uses
231 # $machine, $vendor, and $os, and changes them whenever convenient.
232 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
234 # Don't allow vendor == "unknown"
235 test "$config_vendor" = unknown && config_vendor=
236 config_os="`echo $config_os | sed 's/^unknown-//'`"
238 # Some configurations imply other options.
239 case "$host_os" in
240 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
241 # These systems always use GNU tools.
242 gnu_ld=yes gnu_as=yes ;;
243 esac
244 case "$host_os" in
245 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
246 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
247 ;;
248 gnu* | linux* | sysv4* | solaris2* | irix6*)
249 # These systems (almost) always use the ELF format.
250 elf=yes
251 ;;
252 esac
254 machine=$config_machine
255 vendor=$config_vendor
256 os=$config_os
258 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
259 # Unify this here.
260 if test "$machine" = rs6000; then
261 machine="powerpc"
262 fi
264 ###
265 ### I put this here to prevent those annoying emails from people who cannot
266 ### read and try to compile glibc on unsupported platforms. --drepper
267 ###
268 ### By using the undocumented --enable-hacker-mode option for configure
269 ### one can skip this test to make the configuration not fail for unsupported
270 ### platforms.
271 ###
272 if test -z "$enable_hacker_mode"; then
273 case "$machine-$host_os" in
274 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
275 ;;
276 *)
277 echo "*** The GNU C library is currently not available for this platform."
278 echo "*** So far nobody cared to port it and if there is no volunteer it"
279 echo "*** might never happen. So, if you have interest to see glibc on"
280 echo "*** this platform visit"
281 echo "*** http://www.gnu.org/software/libc/porting.html"
282 echo "*** and join the group of porters"
283 exit 1
284 ;;
285 esac
286 fi
288 dnl We need to use [ and ] for other purposes for a while now.
289 changequote(,)dnl
290 # Expand the configuration machine name into a subdirectory by architecture
291 # type and particular chip.
292 case "$machine" in
293 a29k | am29000) base_machine=a29k machine=a29k ;;
294 alpha*) base_machine=alpha machine=alpha/$machine ;;
295 arm*) base_machine=arm machine=arm/arm32/$machine ;;
296 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
297 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
298 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
299 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
300 i[3456]86) base_machine=i386 machine=i386/$machine ;;
301 ia64) base_machine=ia64 machine=ia64 ;;
302 m680?0) base_machine=m68k machine=m68k/$machine ;;
303 m68k) base_machine=m68k machine=m68k/m68020 ;;
304 m88???) base_machine=m88k machine=m88k/$machine ;;
305 m88k) base_machine=m88k machine=m88k/m88100 ;;
306 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
307 mips*) base_machine=mips
308 case "`uname -m`" in
309 IP22) machine=mips/mips3 ;;
310 *) machine=mips/$machine ;;
311 esac ;;
312 s390) base_machine=s390 machine=s390/s390-32 ;;
313 s390x) base_machine=s390 machine=s390/s390-64 ;;
314 sh3*) base_machine=sh machine=sh/sh3 ;;
315 sh4*) base_machine=sh machine=sh/sh4 ;;
316 sparc | sparcv[67])
317 base_machine=sparc machine=sparc/sparc32 ;;
318 sparcv8 | supersparc | hypersparc)
319 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
320 sparcv8plus | sparcv8plusa | sparcv9)
321 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
322 sparcv8plusb | sparcv9b)
323 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
324 sparc64 | ultrasparc)
325 base_machine=sparc machine=sparc/sparc64 ;;
326 sparc64b | ultrasparc3)
327 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
328 thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
329 esac
330 changequote([,])dnl
331 AC_SUBST(base_machine)
333 if test "$base_machine" = "i386"; then
334 AC_DEFINE(USE_REGPARMS)
335 fi
337 # Compute the list of sysdep directories for this configuration.
338 # This can take a while to compute.
339 sysdep_dir=$srcdir/sysdeps
340 AC_MSG_CHECKING(sysdep dirs)
341 dnl We need to use [ and ] for other purposes for a while now.
342 changequote(,)dnl
343 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
344 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
346 case "$os" in
347 gnu*)
348 base_os=mach/hurd ;;
349 netbsd* | 386bsd* | freebsd* | bsdi*)
350 base_os=unix/bsd/bsd4.4 ;;
351 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
352 base_os=unix/bsd ;;
353 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
354 base_os=unix/sysv ;;
355 irix6*)
356 base_os=unix/sysv/irix6/$os ;;
357 solaris[2-9]*)
358 base_os=unix/sysv/sysv4 ;;
359 hpux*)
360 base_os=unix/sysv/hpux/$os ;;
361 aix4.3*)
362 base_os=unix/sysv/aix/aix4.3 ;;
363 none)
364 base_os=standalone ;;
365 *)
366 base_os='' ;;
367 esac
369 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
370 tail=$os
371 ostry=$os
372 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
373 ostry="$ostry /$o"
374 tail=$o
375 done
376 o=`echo $tail | sed 's/[0-9]*$//'`
377 if test $o != $tail; then
378 ostry="$ostry /$o"
379 fi
380 # For linux-gnu, try linux-gnu, then linux.
381 o=`echo $tail | sed 's/-.*$//'`
382 if test $o != $tail; then
383 ostry="$ostry /$o"
384 fi
386 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
387 base=
388 tail=$base_os
389 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
390 set $b
391 base="$base /$1"
392 tail="$2"
393 done
395 # For sparc/sparc32, try sparc/sparc32 and then sparc.
396 mach=
397 tail=$machine
398 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
399 set $m
400 # Prepend the machine's FPU directory unless --without-fp.
401 if test "$with_fp" = yes; then
402 mach="$mach /$1/fpu"
403 fi
404 mach="$mach /$1"
405 tail="$2"
406 done
408 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
409 changequote([,])dnl
411 # Find what sysdep directories exist.
412 sysnames=
413 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
414 for d in $add_ons_pfx ''; do
415 for b in $base ''; do
416 for m0 in $mach ''; do
417 for v in /$vendor ''; do
418 test "$v" = / && continue
419 for o in /$ostry ''; do
420 test "$o" = / && continue
421 for m in $mach ''; do
422 if test "$m0$b$v$o$m"; then
423 try="${d}sysdeps$m0$b$v$o$m"
424 test -n "$enable_debug_configure" &&
425 echo "$0 [DEBUG]: try $try" >&2
426 if test -d $srcdir/$try; then
427 sysnames="$sysnames $try"
428 { test -n "$o" || test -n "$b"; } && os_used=t
429 { test -n "$m" || test -n "$m0"; } && machine_used=t
430 fi
431 fi
432 done
433 done
434 done
435 done
436 done
437 done
438 IFS="$ac_save_ifs"
440 if test -z "$os_used" && test "$os" != none; then
441 AC_MSG_ERROR(Operating system $os is not supported.)
442 fi
443 if test -z "$machine_used" && test "$machine" != none; then
444 AC_MSG_ERROR(The $machine is not supported.)
445 fi
447 # We have now validated the configuration.
450 # If using ELF, look for an `elf' subdirectory of each machine directory.
451 # We prepend these rather than inserting them whereever the machine appears
452 # because things specified by the machine's ELF ABI should override
453 # OS-specific things, and should always be the same for any OS on the
454 # machine (otherwise what's the point of an ABI?).
455 if test "$elf" = yes; then
456 elf_dirs=
457 for d in $add_ons_pfx ''; do
458 for m in $mach; do
459 if test -d $srcdir/${d}sysdeps$m/elf; then
460 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
461 fi
462 done
463 done
464 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
465 fi
468 # Expand the list of system names into a full list of directories
469 # from each element's parent name and Implies file (if present).
470 set $sysnames
471 names=
472 while test $# -gt 0; do
473 name=$1
474 shift
476 case " $names " in *" $name "*)
477 # Already in the list.
478 continue
479 esac
481 # Report each name as we discover it, so there is no long pause in output.
482 echo $ac_n "$name $ac_c" >&AC_FD_MSG
484 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
486 case $name in
487 /*) xsrcdir= ;;
488 *) xsrcdir=$srcdir/ ;;
489 esac
490 test -n "$enable_debug_configure" &&
491 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
493 if test -f $xsrcdir$name/Implies; then
494 # Collect more names from the `Implies' file (removing comments).
495 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
496 implied=
497 for x in $implied_candidate; do
498 if test -d $xsrcdir$name_base/$x; then
499 implied="$implied $name_base/$x";
500 else
501 AC_MSG_WARN($name/Implies specifies nonexistent $x)
502 fi
503 done
504 else
505 implied=
506 fi
508 # Add NAME to the list of names.
509 names="$names $name"
511 # Find the parent of NAME, using the empty string if it has none.
512 changequote(,)dnl
513 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
514 changequote([,])dnl
516 # Add the names implied by NAME, and NAME's parent (if it has one), to
517 # the list of names to be processed (the argument list). We prepend the
518 # implied names to the list and append the parent. We want implied
519 # directories to come before further directories inferred from the
520 # configuration components; this ensures that for sysv4, unix/common
521 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
522 # after sysv4).
523 sysnames="`echo $implied $* $parent`"
524 test -n "$sysnames" && set $sysnames
525 done
527 # Add the default directories.
528 default_sysnames=sysdeps/generic
529 if test "$elf" = yes; then
530 default_sysnames="sysdeps/generic/elf $default_sysnames"
531 fi
532 sysnames="$names $default_sysnames"
533 AC_SUBST(sysnames)
534 # The other names were emitted during the scan.
535 AC_MSG_RESULT($default_sysnames)
538 ### Locate tools.
540 AC_PROG_INSTALL
541 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
542 # The makefiles need to use a different form to find it in $srcdir.
543 INSTALL='\$(..)./scripts/install-sh -c'
544 fi
545 AC_PROG_LN_S
547 # We need the physical current working directory. We cannot use the
548 # "pwd -P" shell builtin since that's not portable. Instead we try to
549 # find a pwd binary. Note that assigning to the PWD environment
550 # variable might have some interesting side effects, so we don't do
551 # that.
552 AC_PATH_PROG(PWD_P, pwd, no)
553 if test "$PWD_P" = no; then
554 AC_MSG_ERROR(*** A pwd binary could not be found.)
555 fi
557 # These programs are version sensitive.
558 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
559 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
560 [version \([egcygnustpi-]*[0-9.]*\)],
561 [*gcc-2.9[5-9].*|*2.8.[1-9]*|*2.9|*2.9.[0-9]*|2.9[5-9]*|3.[0-9]*|cygnus-2.9[1-9]*|gcc-2.9[5-9]|gcc-2.1[0-9][0-9]|sgicc-*],
562 critic_missing=t)
563 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
564 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
565 [3.79* | 3.[89]*], critic_missing=t)
568 if test -n "$critic_missing"; then
569 AC_MSG_ERROR([
570 *** Some critical program is missing or too old.
571 *** Check the INSTALL file for required versions.])
572 fi
575 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
576 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
577 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*], MSGFMT=: aux_missing=t)
578 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
579 [GNU texinfo.* \([0-9][0-9.]*\)],
580 [4.*], MAKEINFO=: aux_missing=t)
581 AC_CHECK_PROG_VER(SED, gsed sed, --version,
582 [GNU sed version \([0-9]*\.[0-9.]*\)],
583 [3.0[2-9]*|3.[1-9]*|[4-9]*], SED=: aux_missing=t)
585 AC_PROG_CC_LOCAL
586 AC_CANONICAL_BUILD
587 if test $host != $build; then
588 AC_CHECK_PROGS(BUILD_CC, gcc cc)
589 fi
590 AC_SUBST(cross_compiling)
591 AC_PROG_CPP
592 LIBC_PROG_BINUTILS
593 AC_CHECK_TOOL(MIG, mig)
595 # Accept binutils 2.10.1 or newer (and also any ia64 2.9 version)
596 # XXX Commented out because it filters out too many good versions.
597 # XXX --drepper
598 # AC_CHECK_PROG_VER(AS, $AS, --version,
599 # [GNU assembler.* \([0-9]*\.[0-9.]*\(-ia64-[0-9]*\)*\)],
600 # [2.10.[1-9]* | 2.1[1-9]* | 2.9-ia64-*], AS=: critic_missing=t)
602 test -n "$aux_missing" && AC_MSG_WARN([
603 *** An auxiliary program is missing or too old;
604 *** some features will be disabled.
605 *** Check the INSTALL file for required versions.])
607 # glibcbug.in wants to know the compiler version.
608 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
609 AC_SUBST(CCVERSION)
611 # if using special system headers, find out the compiler's sekrit
612 # header directory and add that to the list. NOTE: Only does the right
613 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
614 if test -n "$sysheaders"; then
615 ccheaders=`$CC -print-file-name=include`
616 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
617 fi
618 AC_SUBST(SYSINCLUDES)
620 # check if ranlib is necessary
621 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
622 cat > conftest.c <<EOF
623 int a;
624 char b;
625 void c(void) {}
626 EOF
627 $CC $CFLAGS -c conftest.c
628 $AR cr conftest.a conftest.c
629 cp conftest.a conftest2.a
630 $RANLIB conftest.a
631 if cmp -s conftest.a conftest2.a; then
632 libc_cv_ranlib_necessary=no
633 else
634 libc_cv_ranlib_necessary=yes
635 fi
636 rm -rf conftest*])
637 if test "$libc_cv_ranlib_necessary" = no; then
638 RANLIB=:
639 fi
641 # Test if LD_LIBRARY_PATH contains the notation for the current directory
642 # since this would lead to problems installing/building glibc.
643 # LD_LIBRARY_PATH contains the current directory if one of the following
644 # is true:
645 # - one of the terminals (":" and ";") is the first or last sign
646 # - two terminals occur directly after each other
647 # - the path contains an element with a dot in it
648 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
649 changequote(,)dnl
650 case ${LD_LIBRARY_PATH} in
651 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
652 ld_library_path_setting="contains current directory"
653 ;;
654 *)
655 ld_library_path_setting="ok"
656 ;;
657 esac
658 changequote([,])dnl
659 AC_MSG_RESULT($ld_library_path_setting)
660 if test "$ld_library_path_setting" != "ok"; then
661 AC_MSG_ERROR([
662 *** LD_LIBRARY_PATH shouldn't contain the current directory when
663 *** building glibc. Please change the environment variable
664 *** and run configure again.])
665 fi
667 AC_PATH_PROG(BASH, bash, no)
668 if test "$BASH" != no &&
669 $BASH -c 'test "$BASH_VERSINFO" \
670 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
671 libc_cv_have_bash2=yes
672 else
673 libc_cv_have_bash2=no
674 fi
675 AC_SUBST(libc_cv_have_bash2)
677 dnl We need a ksh compatible shell for tzselect.
678 if test "$BASH" = no; then
679 AC_PATH_PROG(KSH, ksh, no)
680 if test "$KSH" = no; then
681 libc_cv_have_ksh=no
682 else
683 libc_cv_have_ksh=yes
684 fi
685 else
686 KSH="$BASH"
687 AC_SUBST(KSH)
688 libc_cv_have_ksh=yes
689 fi
690 AC_SUBST(libc_cv_have_ksh)
692 AC_PROG_AWK
693 AC_PATH_PROG(PERL, perl, no)
694 if test "$PERL" != no &&
695 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
696 PERL=no
697 fi
698 AC_PATH_PROG(INSTALL_INFO, install-info, no,
699 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
700 if test "$INSTALL_INFO" != "no"; then
701 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
702 [mkdir conftest.d
703 # There is a hard ^_ on the next line. I am open to better ideas.
704 (echo '\x1f'
705 echo 'File: dir Node: Top This is the top of the INFO tree'
706 echo '* Menu:') >conftest.d/dir
707 (echo 'INFO-DIR-SECTION i-d-s works'
708 echo 'START-INFO-DIR-ENTRY'
709 echo '* Prog: (prog). Program.'
710 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
711 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
712 then
713 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
714 then libc_cv_old_debian_install_info=no
715 else libc_cv_old_debian_install_info=yes
716 fi
717 else libc_cv_old_debian_install_info=no testfailed=t
718 fi
719 rm -fr conftest.d])
720 if test -n "$testfailed"
721 then AC_MSG_WARN([install-info errored out, check config.log])
722 fi
723 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
724 fi
725 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
727 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
729 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
730 echo '#include <stddef.h>
731 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
732 if eval "$ac_cpp conftest.c 2>/dev/null" \
733 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
734 libc_cv_signed_size_t=no
735 else
736 libc_cv_signed_size_t=yes
737 fi
738 rm -f conftest*])
739 if test $libc_cv_signed_size_t = yes; then
740 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
741 cat >> confdefs.h <<\EOF
742 #undef __SIZE_TYPE__
743 #define __SIZE_TYPE__ unsigned
744 EOF
745 fi
747 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
748 AC_TRY_COMPILE(dnl
749 [#define __need_size_t
750 #define __need_wchar_t
751 #include <stddef.h>
752 #define __need_NULL
753 #include <stddef.h>], [size_t size; wchar_t wchar;
754 #ifdef offsetof
755 #error stddef.h ignored __need_*
756 #endif
757 if (&size == NULL || &wchar == NULL) abort ();],
758 libc_cv_friendly_stddef=yes,
759 libc_cv_friendly_stddef=no)])
760 if test $libc_cv_friendly_stddef = yes; then
761 config_vars="$config_vars
762 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
763 fi
765 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
766 libc_cv_need_minus_P, [dnl
767 cat > conftest.S <<EOF
768 #include "confdefs.h"
769 /* Nothing whatsoever. */
770 EOF
771 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
772 libc_cv_need_minus_P=no
773 else
774 libc_cv_need_minus_P=yes
775 fi
776 rm -f conftest*])
777 if test $libc_cv_need_minus_P = yes; then
778 config_vars="$config_vars
779 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
780 fi
782 AC_MSG_CHECKING(whether .text pseudo-op must be used)
783 AC_CACHE_VAL(libc_cv_dot_text, [dnl
784 cat > conftest.s <<EOF
785 .text
786 EOF
787 libc_cv_dot_text=
788 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
789 libc_cv_dot_text=.text
790 fi
791 rm -f conftest*])
792 if test -z "$libc_cv_dot_text"; then
793 AC_MSG_RESULT(no)
794 else
795 AC_MSG_RESULT(yes)
796 fi
798 AC_CACHE_CHECK(for assembler global-symbol directive,
799 libc_cv_asm_global_directive, [dnl
800 libc_cv_asm_global_directive=UNKNOWN
801 for ac_globl in .globl .global .EXPORT; do
802 cat > conftest.s <<EOF
803 ${libc_cv_dot_text}
804 ${ac_globl} foo
805 foo:
806 EOF
807 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
808 libc_cv_asm_global_directive=${ac_globl}
809 fi
810 rm -f conftest*
811 test $libc_cv_asm_global_directive != UNKNOWN && break
812 done])
813 if test $libc_cv_asm_global_directive = UNKNOWN; then
814 AC_MSG_ERROR(cannot determine asm global directive)
815 else
816 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
817 fi
819 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
820 cat > conftest.s <<EOF
821 ${libc_cv_dot_text}
822 foo:
823 .set glibc_conftest_frobozz,foo
824 $libc_cv_asm_global_directive glibc_conftest_frobozz
825 EOF
826 # The alpha-dec-osf1 assembler gives only a warning for `.set'
827 # (but it doesn't work), so we must do a linking check to be sure.
828 cat > conftest1.c <<\EOF
829 extern int glibc_conftest_frobozz;
830 main () { printf ("%d\n", glibc_conftest_frobozz); }
831 EOF
832 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
833 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
834 libc_cv_asm_set_directive=yes
835 else
836 libc_cv_asm_set_directive=no
837 fi
838 rm -f conftest*])
839 if test $libc_cv_asm_set_directive = yes; then
840 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
841 fi
843 # The Aix ld uses global .symbol_names instead of symbol_names.
844 case "$os" in
845 aix4.3*)
846 AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
847 esac
849 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
850 [cat > conftest.s <<EOF
851 ${libc_cv_dot_text}
852 _sym:
853 .symver _sym,sym@VERS
854 EOF
855 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
856 libc_cv_asm_symver_directive=yes
857 else
858 libc_cv_asm_symver_directive=no
859 fi
860 rm -f conftest*])
861 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
862 if test $libc_cv_asm_symver_directive = yes; then
863 cat > conftest.s <<EOF
864 ${libc_cv_dot_text}
865 _sym:
866 .symver _sym,sym@VERS
867 EOF
868 cat > conftest.map <<EOF
869 VERS_1 {
870 global: sym;
871 };
873 VERS_2 {
874 global: sym;
875 } VERS_1;
876 EOF
877 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
878 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
879 -nostartfiles -nostdlib
880 -Wl,--version-script,conftest.map
881 1>&AC_FD_CC]);
882 then
883 libc_cv_ld_version_script_option=yes
884 else
885 libc_cv_ld_version_script_option=no
886 fi
887 else
888 libc_cv_ld_version_script_option=no
889 fi
890 else
891 libc_cv_ld_version_script_option=no
892 fi
893 rm -f conftest*])
894 if test $shared != no &&
895 test $libc_cv_asm_symver_directive = yes &&
896 test $libc_cv_ld_version_script_option = yes &&
897 test $enable_versioning = yes; then
898 VERSIONING=yes
899 AC_DEFINE(DO_VERSIONING)
900 else
901 VERSIONING=no
902 fi
903 AC_SUBST(VERSIONING)
905 if test $shared != no && test $VERSIONING = no; then
906 echo "\
907 *** WARNING: You should not compile GNU libc without versioning. Not using
908 *** versioning will introduce incompatibilities so that old binaries
909 *** will not run anymore.
910 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
911 fi
912 if test $elf = yes; then
913 AC_CACHE_CHECK(for .previous assembler directive,
914 libc_cv_asm_previous_directive, [dnl
915 cat > conftest.s <<EOF
916 .section foo_section
917 .previous
918 EOF
919 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
920 libc_cv_asm_previous_directive=yes
921 else
922 libc_cv_asm_previous_directive=no
923 fi
924 rm -f conftest*])
925 if test $libc_cv_asm_previous_directive = yes; then
926 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
927 else
928 AC_CACHE_CHECK(for .popsection assembler directive,
929 libc_cv_asm_popsection_directive, [dnl
930 cat > conftest.s <<EOF
931 .pushsection foo_section
932 .popsection
933 EOF
934 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
935 libc_cv_asm_popsection_directive=yes
936 else
937 libc_cv_asm_popsection_directive=no
938 fi
939 rm -f conftest*])
940 if test $libc_cv_asm_popsection_directive = yes; then
941 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
942 fi
943 fi
944 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
945 libc_cv_asm_protected_directive, [dnl
946 cat > conftest.s <<EOF
947 .protected foo
948 foo:
949 .hidden bar
950 bar:
951 EOF
952 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
953 libc_cv_asm_protected_directive=yes
954 else
955 libc_cv_asm_protected_directive=no
956 fi
957 rm -f conftest*])
958 AC_SUBST(libc_cv_asm_protected_directive)
960 AC_CACHE_CHECK(for -z nodelete option,
961 libc_cv_z_nodelete, [dnl
962 cat > conftest.c <<EOF
963 int _start (void) { return 42; }
964 EOF
965 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c -Wl,--enable-new-dtags,-z,nodelete 1>&AC_FD_CC])
966 then
967 libc_cv_z_nodelete=yes
968 else
969 libc_cv_z_nodelete=no
970 fi
971 rm -f conftest*])
972 AC_SUBST(libc_cv_z_nodelete)
974 AC_CACHE_CHECK(for -z nodlopen option,
975 libc_cv_z_nodlopen, [dnl
976 cat > conftest.c <<EOF
977 int _start (void) { return 42; }
978 EOF
979 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c -Wl,--enable-new-dtags,-z,nodlopen 1>&AC_FD_CC])
980 then
981 libc_cv_z_nodlopen=yes
982 else
983 libc_cv_z_nodlopen=no
984 fi
985 rm -f conftest*])
986 AC_SUBST(libc_cv_z_nodlopen)
988 AC_CACHE_CHECK(for -z initfirst option,
989 libc_cv_z_initfirst, [dnl
990 cat > conftest.c <<EOF
991 int _start (void) { return 42; }
992 EOF
993 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c -Wl,--enable-new-dtags,-z,initfirst 1>&AC_FD_CC])
994 then
995 libc_cv_z_initfirst=yes
996 else
997 libc_cv_z_initfirst=no
998 fi
999 rm -f conftest*])
1000 AC_SUBST(libc_cv_z_initfirst)
1002 AC_CACHE_CHECK(for -Bgroup option,
1003 libc_cv_Bgroup, [dnl
1004 cat > conftest.c <<EOF
1005 int _start (void) { return 42; }
1006 EOF
1007 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c -Wl,-Bgroup -nostdlib 1>&AC_FD_CC])
1008 then
1009 libc_cv_Bgroup=yes
1010 else
1011 libc_cv_Bgroup=no
1012 fi
1013 rm -f conftest*])
1014 AC_SUBST(libc_cv_Bgroup)
1015 fi
1017 if test $elf != yes; then
1018 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1019 [AC_TRY_COMPILE(, [asm (".section .init");
1020 asm (".section .fini");
1021 asm ("${libc_cv_dot_text}");],
1022 libc_cv_have_initfini=yes,
1023 libc_cv_have_initfini=no)])
1024 AC_SUBST(libc_cv_have_initfini)dnl
1025 if test $libc_cv_have_initfini = yes; then
1026 AC_DEFINE(HAVE_INITFINI)
1027 fi
1028 fi
1030 if test $elf = yes -a $gnu_ld = yes; then
1031 AC_CACHE_CHECK(whether cc puts quotes around section names,
1032 libc_cv_have_section_quotes,
1033 [cat > conftest.c <<EOF
1034 static const int foo
1035 __attribute__ ((section ("bar"))) = 1;
1036 EOF
1037 if ${CC-cc} -S conftest.c -o conftest.s; then
1038 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1039 libc_cv_have_section_quotes=yes
1040 else
1041 libc_cv_have_section_quotes=no
1042 fi
1043 else
1044 libc_cv_have_section_quotes=unknown
1045 fi
1046 rm -f conftest.[cs]
1047 ])
1048 if test $libc_cv_have_section_quotes = yes; then
1049 AC_DEFINE(HAVE_SECTION_QUOTES)
1050 fi
1051 fi
1053 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1054 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1055 [cat > conftest.$ac_ext <<EOF
1056 dnl This sometimes fails to find confdefs.h, for some reason.
1057 dnl [#]line __oline__ "[$]0"
1058 [#]line __oline__ "configure"
1059 #include "confdefs.h"
1060 void underscore_test(void) {
1061 return; }
1062 EOF
1063 if AC_TRY_EVAL(ac_compile); then
1064 if grep _underscore_test conftest* >/dev/null; then
1065 ifelse([$1], , :, [rm -f conftest*
1066 $1])
1067 else
1068 ifelse([$2], , , [rm -f conftest*
1069 $2])
1070 fi
1071 else
1072 echo "configure: failed program was:" >&AC_FD_CC
1073 cat conftest.$ac_ext >&AC_FD_CC
1074 ifelse([$2], , , [rm -f conftest*
1075 $2])
1076 fi
1077 rm -f conftest*])
1079 if test $elf = yes; then
1080 libc_cv_asm_underscores=no
1081 else
1082 if test $ac_cv_prog_cc_works = yes; then
1083 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1084 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1085 libc_cv_asm_underscores=yes,
1086 libc_cv_asm_underscores=no)])
1087 else
1088 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1089 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1090 libc_cv_asm_underscores=no)])
1091 fi
1092 fi
1093 if test $libc_cv_asm_underscores = no; then
1094 AC_DEFINE(NO_UNDERSCORES)
1095 fi
1097 if test $elf = yes; then
1098 libc_cv_weak_symbols=yes
1099 fi
1101 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1102 [dnl
1103 cat > conftest.s <<EOF
1104 ${libc_cv_dot_text}
1105 ${libc_cv_asm_global_directive} foo
1106 foo:
1107 .weak foo
1108 .weak bar; bar = foo
1109 EOF
1110 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
1111 libc_cv_asm_weak_directive=yes
1112 else
1113 libc_cv_asm_weak_directive=no
1114 fi
1115 rm -f conftest*])
1117 if test $libc_cv_asm_weak_directive = no; then
1118 AC_CACHE_CHECK(for assembler .weakext directive,
1119 libc_cv_asm_weakext_directive,
1120 [dnl
1121 cat > conftest.s <<EOF
1122 ${libc_cv_dot_text}
1123 ${libc_cv_asm_global_directive} foo
1124 foo:
1125 .weakext bar foo
1126 .weakext baz
1127 ${libc_cv_asm_global_directive} baz
1128 baz:
1129 EOF
1130 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
1131 libc_cv_asm_weakext_directive=yes
1132 else
1133 libc_cv_asm_weakext_directive=no
1134 fi
1135 rm -f conftest*])
1137 fi # no .weak
1139 if test $libc_cv_asm_weak_directive = yes; then
1140 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1141 elif test $libc_cv_asm_weakext_directive = yes; then
1142 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1143 fi
1145 dnl The standard hppa assembler uses `;' to start comments and `!'
1146 dnl as a line separator. CRIS uses `;' to start comments and `@' for
1147 dnl line separator.
1148 case "${host_cpu}-${host_os}" in
1149 cris*)
1150 libc_cv_asm_line_sep='@'
1151 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1152 ;;
1153 hppa*linux*)
1154 AC_CACHE_CHECK(for assembler line separator,
1155 libc_cv_asm_line_sep, [dnl
1156 cat > conftest.s <<EOF
1157 nop ; is_old_puffin
1158 EOF
1159 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
1160 libc_cv_asm_line_sep='!'
1161 else
1162 if test -z "$enable_hacker_mode"; then
1163 echo "*** You need a newer assembler to compile glibc"
1164 rm -f conftest*
1165 exit 1
1166 fi
1167 libc_cv_asm_line_sep=';'
1168 fi
1169 rm -f conftest*])
1170 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1171 ;;
1172 esac
1174 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1175 cat > conftest.c <<\EOF
1176 _start () {}
1177 int __eh_pc;
1178 __throw () {}
1179 EOF
1180 dnl No \ in command here because it ends up inside ''.
1181 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1182 -nostdlib -nostartfiles -Wl,--no-whole-archive
1183 -o conftest conftest.c 1>&AC_FD_CC]); then
1184 libc_cv_ld_no_whole_archive=yes
1185 else
1186 libc_cv_ld_no_whole_archive=no
1187 fi
1188 rm -f conftest*])
1189 if test $libc_cv_ld_no_whole_archive = yes; then
1190 no_whole_archive=-Wl,--no-whole-archive
1191 fi
1192 AC_SUBST(no_whole_archive)dnl
1194 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1195 cat > conftest.c <<\EOF
1196 _start () {}
1197 int __eh_pc;
1198 __throw () {}
1199 EOF
1200 dnl No \ in command here because it ends up inside ''.
1201 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1202 -nostdlib -nostartfiles -fexceptions
1203 -o conftest conftest.c 1>&AC_FD_CC]); then
1204 libc_cv_gcc_exceptions=yes
1205 else
1206 libc_cv_gcc_exceptions=no
1207 fi
1208 rm -f conftest*])
1209 if test $libc_cv_gcc_exceptions = yes; then
1210 exceptions=-fexceptions
1211 fi
1212 AC_SUBST(exceptions)dnl
1214 if test "$base_machine" = alpha ; then
1215 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
1216 cat > conftest.c <<\EOF
1217 foo () { }
1218 EOF
1219 dnl
1220 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
1221 then
1222 libc_cv_gcc_alpha_ng_prefix=yes
1223 else
1224 libc_cv_gcc_alpha_ng_prefix=no
1225 fi
1226 rm -f conftest* ])
1227 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
1228 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
1229 else
1230 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
1231 fi
1232 fi
1234 if test "$host_cpu" = powerpc ; then
1235 # Check for a bug present in at least versions 2.8.x of GCC
1236 # and versions 1.0.x of EGCS.
1237 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1238 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1239 libc_cv_c_asmcr0_bug='no',
1240 libc_cv_c_asmcr0_bug='yes')])
1241 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1242 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1243 fi
1244 fi
1246 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1247 [cat > conftest.c <<EOF
1248 #line __oline__ "configure"
1249 static char __EH_FRAME_BEGIN__[];
1250 _start ()
1251 {
1252 #ifdef CHECK__register_frame
1253 __register_frame (__EH_FRAME_BEGIN__);
1254 __deregister_frame (__EH_FRAME_BEGIN__);
1255 #endif
1256 #ifdef CHECK__register_frame_info
1257 __register_frame_info (__EH_FRAME_BEGIN__);
1258 __deregister_frame_info (__EH_FRAME_BEGIN__);
1259 #endif
1260 }
1261 int __eh_pc;
1262 __throw () {}
1263 /* FIXME: this is fragile. */
1264 malloc () {}
1265 strcmp () {}
1266 strlen () {}
1267 memcpy () {}
1268 memset () {}
1269 free () {}
1270 abort () {}
1271 __bzero () {}
1272 EOF
1273 dnl No \ in command here because it ends up inside ''.
1274 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1275 -nostdlib -nostartfiles
1276 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1277 libc_cv_gcc_dwarf2_unwind_info=static
1278 else
1279 libc_cv_gcc_dwarf2_unwind_info=no
1280 fi
1281 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1282 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1283 -nostdlib -nostartfiles
1284 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1285 libc_cv_gcc_dwarf2_unwind_info=yes
1286 else
1287 libc_cv_gcc_dwarf2_unwind_info=no
1288 fi
1289 fi
1290 rm -f conftest*])
1291 case $libc_cv_gcc_dwarf2_unwind_info in
1292 yes)
1293 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1294 ;;
1295 static)
1296 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1297 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1298 ;;
1299 esac
1301 dnl Check whether compiler understands __builtin_expect.
1302 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1303 [cat > conftest.c <<EOF
1304 #line __oline__ "configure"
1305 int foo (int a)
1306 {
1307 a = __builtin_expect (a, 10);
1308 return a == 10 ? 0 : 1;
1309 }
1310 EOF
1311 dnl No \ in command here because it ends up inside ''.
1312 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1313 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1314 libc_cv_gcc_builtin_expect=yes
1315 else
1316 libc_cv_gcc_builtin_expect=no
1317 fi
1318 rm -f conftest*])
1319 if test "$libc_cv_gcc_builtin_expect" = yes; then
1320 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1321 fi
1323 dnl Check whether the compiler supports subtraction of local labels.
1324 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1325 [cat > conftest.c <<EOF
1326 changequote(,)dnl
1327 #line __oline__ "configure"
1328 int foo (int a)
1329 {
1330 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1331 void *p = &&l1 + ar[a];
1332 goto *p;
1333 l1:
1334 return 1;
1335 l2:
1336 return 2;
1337 }
1338 changequote([,])dnl
1339 EOF
1340 dnl No \ in command here because it ends up inside ''.
1341 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1342 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1343 libc_cv_gcc_subtract_local_labels=yes
1344 else
1345 libc_cv_gcc_subtract_local_labels=no
1346 fi
1347 rm -f conftest*])
1348 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1349 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1350 fi
1352 dnl Check whether we have the gd library available.
1353 AC_MSG_CHECKING(for libgd)
1354 if test "$with_gd" != "no"; then
1355 old_CFLAGS="$CFLAGS"
1356 CFLAGS="$CFLAGS $libgd_include"
1357 old_LDFLAGS="$LDFLAGS"
1358 LDFLAGS="$LDFLAGS $libgd_ldflags"
1359 old_LIBS="$LIBS"
1360 LIBS="$LIBS -lgd -lpng -lz -lm"
1361 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1362 CFLAGS="$old_CFLAGS"
1363 LDFLAGS="$old_LDFLAGS"
1364 LIBS="$old_LIBS"
1365 else
1366 LIBGD=no
1367 fi
1368 AC_MSG_RESULT($LIBGD)
1369 AC_SUBST(LIBGD)
1371 dnl check for the size of 'long double'.
1372 AC_CHECK_SIZEOF(long double, 0)
1373 sizeof_long_double=$ac_cv_sizeof_long_double
1374 AC_SUBST(sizeof_long_double)
1376 ### End of automated tests.
1377 ### Now run sysdeps configure fragments.
1379 # sysdeps configure fragments may set these with files to be linked below.
1380 libc_link_dests=
1381 libc_link_sources=
1383 # They also can set these variables.
1384 use_ldconfig=no
1385 ldd_rewrite_script=no
1387 # Iterate over all the sysdep directories we will use, running their
1388 # configure fragments, and looking for a uname implementation.
1389 uname=
1390 for dir in $sysnames; do
1391 case $dir in
1392 /*) dest=$dir ;;
1393 *) dest=$srcdir/$dir ;;
1394 esac
1395 if test -r $dest/configure; then
1396 AC_MSG_RESULT(running configure fragment for $dest)
1397 . $dest/configure
1398 fi
1399 [
1400 if test -z "$uname"; then
1401 if test -r $dest/uname.c ||
1402 test -r $dest/uname.S ||
1403 { test -r $dest/syscalls.list &&
1404 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1405 uname=$dir
1406 fi
1407 fi
1408 ]dnl
1409 done
1411 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1413 # If we will use the generic uname implementation, we must figure out what
1414 # it will say by examining the system, and write the results in config-name.h.
1415 if test "$uname" = "sysdeps/generic"; then
1417 changequote(,)dnl
1418 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1419 changequote([,])dnl
1420 if test $uname_sysname != $config_os; then
1421 config_release=`echo $config_os | sed s/$uname_sysname//`
1422 fi
1423 dnl
1424 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1425 if test -r /vmunix; then
1426 kernel_id=`strings /vmunix | grep UNIX`
1427 elif test -r /dynix; then
1428 kernel_id=`strings /dynix | grep DYNIX`
1429 else
1430 kernel_id=
1431 fi
1432 ])dnl
1434 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1435 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1436 changequote(,)dnl
1437 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1438 changequote([,])dnl
1439 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1440 != x$config_release; then
1441 # The configuration release is a substring of the kernel release.
1442 libc_cv_uname_release=$kernel_release
1443 elif test x$config_release != x; then
1444 libc_cv_uname_release=$config_release
1445 elif test x$kernel_release != x; then
1446 libc_cv_uname_release=$kernel_release
1447 else
1448 libc_cv_uname_release=unknown
1449 fi])
1450 uname_release="$libc_cv_uname_release"
1452 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1453 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1454 changequote(,)dnl
1455 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1456 changequote([,])dnl
1457 if test -n "$kernel_version"; then
1458 libc_cv_uname_version="$kernel_version"
1459 else
1460 libc_cv_uname_version=unknown
1461 fi])
1462 uname_version="$libc_cv_uname_version"
1464 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1465 config_uname=config-name.h:config-name.in
1466 else
1467 # For non-generic uname, we don't need to create config-name.h at all.
1468 config_uname=
1469 fi
1471 AC_MSG_CHECKING(stdio selection)
1472 AC_SUBST(stdio)
1473 case $stdio in
1474 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1475 default) stdio=stdio ;;
1476 esac
1477 AC_MSG_RESULT($stdio)
1479 # Test for old glibc 2.0.x headers so that they can be removed properly
1480 # Search only in includedir.
1481 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1482 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1483 then
1484 old_glibc_headers=yes
1485 else
1486 old_glibc_headers=no
1487 fi
1488 AC_MSG_RESULT($old_glibc_headers)
1489 if test ${old_glibc_headers} = yes; then
1490 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1491 AC_MSG_WARN(*** be removed.)
1492 fi
1493 AC_SUBST(old_glibc_headers)
1495 AC_SUBST(libc_cv_slibdir)
1496 AC_SUBST(libc_cv_localedir)
1497 AC_SUBST(libc_cv_sysconfdir)
1498 AC_SUBST(libc_cv_rootsbindir)
1500 AC_SUBST(use_ldconfig)
1501 AC_SUBST(ldd_rewrite_script)
1503 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1504 if test $gnu_ld = yes; then
1505 AC_DEFINE(HAVE_GNU_LD)
1506 fi
1507 if test $gnu_as = yes; then
1508 AC_DEFINE(HAVE_GNU_AS)
1509 fi
1510 if test $elf = yes; then
1511 AC_DEFINE(HAVE_ELF)
1512 fi
1514 AC_SUBST(static)
1515 AC_SUBST(shared)
1516 if test $shared = default; then
1517 if test $gnu_ld = yes; then
1518 shared=$elf
1519 else
1520 # For now we do not assume shared libs are available. In future more
1521 # tests might become available.
1522 shared=no
1523 fi
1524 fi
1526 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1527 [pic_default=yes
1528 cat > conftest.c <<EOF
1529 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1530 # error PIC is default.
1531 #endif
1532 EOF
1533 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1534 pic_default=no
1535 fi
1536 rm -f conftest.*])
1537 AC_SUBST(pic_default)
1539 AC_SUBST(profile)
1540 AC_SUBST(omitfp)
1541 AC_SUBST(bounded)
1542 AC_SUBST(static_nss)
1543 AC_SUBST(nopic_initfini)
1545 AC_SUBST(DEFINES)
1547 case "$add_ons" in
1548 *door*) linux_doors=yes ;;
1549 *) linux_doors=no ;;
1550 esac
1551 AC_SUBST(linux_doors)
1553 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1554 config_makefile=
1555 else
1556 config_makefile=Makefile
1557 fi
1559 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1560 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1561 AC_SUBST(VERSION)
1562 AC_SUBST(RELEASE)
1564 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1565 case $CONFIG_FILES in *config.make*)
1566 echo "$config_vars" >> config.make;;
1567 esac
1568 test -d bits || mkdir bits], [config_vars='$config_vars'])