1 dnl Process this file with autoconf to produce a configure script.
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.
11 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
13 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
16 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
18 *) config_vars="$config_vars
19 gmp-srcdir = $withval" ;;
22 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
24 --with-gd=DIR find libgd include dir and library with prefix DIR,
28 *) libgd_include="-I$withval/include"
29 libgd_ldflags="-L$withval/lib" ;;
32 AC_ARG_WITH(gd-include, dnl
33 --with-gd-include=DIR find libgd include files in DIR,
35 case "$with_gd_include" in
37 *) libgd_include="-I$withval" ;;
40 AC_ARG_WITH(gd-lib, dnl
41 --with-gd-lib=DIR find libgd library files in DIR,
43 case "$with_gd_lib" in
45 *) libgd_ldflags="-L$withval" ;;
49 if test -n "$libgd_include"; then
50 config_vars="$config_vars
51 CFLAGS-memusagestat.c = $libgd_include"
53 if test -n "$libgd_ldflags"; then
54 config_vars="$config_vars
55 libgd-LDFLAGS = $libgd_ldflags"
58 dnl Arguments to specify presence of other packages/features.
60 [ --with-fp if using floating-point hardware [default=yes]],
61 with_fp=$withval, with_fp=yes)
63 AC_ARG_WITH(binutils, dnl
64 --with-binutils=PATH specify location of binutils (as and ld),
65 path_binutils=$withval, path_binutils='')
67 --with-elf if using the ELF object format,
69 AC_ARG_WITH(xcoff, dnl
70 --with-xcoff if using the XCOFF object format,
71 xcoff=$withval, xcoff=no)
73 [ --without-cvs if CVS should not be used],
74 with_cvs=$withval, with_cvs=yes)
75 if test "$with_cvs" = yes; then
76 if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
83 AC_ARG_WITH(headers, dnl
84 [ --with-headers=PATH location of system headers to use
85 [e.g. /usr/src/linux/include]
86 [default=compiler default]],
87 sysheaders=$withval, sysheaders='')
89 AC_ARG_ENABLE(sanity-checks, dnl
90 [ --disable-sanity-checks really do not use threads (should not be used
91 except in special situations) [default=yes]],
92 enable_sanity=$enableval, enable_sanity=yes)
94 dnl Arguments to enable or disable building the static, shared, profiled,
95 dnl and -fomit-frame-pointer libraries.
96 dnl I've disabled this for now since we cannot build glibc without static
97 dnl libraries built in the moment.
98 dnl AC_ARG_ENABLE(static, dnl
99 dnl [ --enable-static build static library [default=yes]],
100 dnl static=$enableval, static=yes)
102 AC_ARG_ENABLE(shared, dnl
103 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
104 shared=$enableval, shared=default)
105 AC_ARG_ENABLE(profile, dnl
106 [ --enable-profile build profiled library [default=yes]],
107 profile=$enableval, profile=yes)
108 AC_ARG_ENABLE(omitfp, dnl
109 [ --enable-omitfp build undebuggable optimized library [default=no]],
110 omitfp=$enableval, omitfp=no)
111 AC_ARG_ENABLE(bounded, dnl
112 [ --enable-bounded build with runtime bounds checking [default=no]],
113 bounded=$enableval, bounded=no)
114 AC_ARG_ENABLE(versioning, dnl
115 [ --disable-versioning do not include versioning information in the
116 library objects [default=yes if supported]],
117 enable_versioning=$enableval, enable_versioning=yes)
119 AC_ARG_ENABLE(oldest-abi, dnl
120 [ --enable-oldest-abi=ABI configure the oldest ABI supported [e.g. 2.2]
121 [default=glibc default]],
122 oldest_abi=$enableval, oldest_abi=no)
123 if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
126 AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
130 dnl Generic infrastructure for drop-in additions to libc.
131 AC_ARG_ENABLE(add-ons, dnl
132 [ --enable-add-ons[=DIR1,DIR2]...
133 configure and build add-ons in DIR1,DIR2,...
134 search for add-ons if no parameter given],
135 [case "$enableval" in
136 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
137 test "$add_ons" = "*" && add_ons= ;;
138 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
142 dnl Let the user avoid using TLS. Don't know why but...
143 dnl XXX For now we disable support by default.
145 [ --with-tls enable support for TLS],
146 usetls=$withval, usetls=no)
148 AC_ARG_ENABLE(hidden-plt, dnl
149 [ --disable-hidden-plt do not hide internal function calls to avoid PLT],
150 hidden=$enableval, hidden=yes)
151 if test "x$hidden" = xno; then
155 AC_CONFIG_SUBDIRS($add_ons)
157 if test x"$add_ons" != x; then
158 for f in $add_ons; do
160 if test "$f" = "crypt"; then
162 *** It seems that you're using an old \`crypt' add-on. crypt is now
163 *** part of glibc and using the old add-on will not work with this
164 *** release. Start again with fresh sources and without the old
165 *** \`crypt' add-on.])
167 if test "$f" = "localedata"; then
169 *** It seems that you're using an old \`localedata' add-on. localedata
170 *** is now part of glibc and using the old add-on will not work with
171 *** this release. Start again with fresh sources and without the old
172 *** \`localedata' add-on.])
174 # Test whether such a subdir really exists.
175 if test -d $srcdir/$f; then
176 add_ons_pfx="$add_ons_pfx $f/"
178 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
183 dnl On some platforms we cannot use dynamic loading. We must provide
184 dnl static NSS modules.
185 AC_ARG_ENABLE(static-nss, dnl
186 [ --enable-static-nss build static NSS modules [default=no]],
187 static_nss=$enableval, static_nss=no)
188 dnl Enable static NSS also if we build no shared objects.
189 if test x"$static_nss" = xyes || test x"$shared" = xno; then
191 AC_DEFINE(DO_STATIC_NSS)
194 AC_ARG_ENABLE(force-install,
195 [ --disable-force-install don't force installation of files from this package,
196 even if they are older than the installed files],
197 force_install=$enableval, force_install=yes)
198 AC_SUBST(force_install)
200 dnl On some platforms we allow dropping compatibility with all kernel
202 AC_ARG_ENABLE(kernel,
203 [ --enable-kernel=VERSION compile for compatibility with kernel not older
205 minimum_kernel=$enableval)
206 dnl Prevent unreasonable values.
207 if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
208 # Better nothing than this.
211 if test "$minimum_kernel" = current; then
212 minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
216 dnl For the development we sometimes want gcc to issue even more warnings.
217 dnl This is not the default since many of the extra warnings are not
219 AC_ARG_ENABLE(all-warnings,
220 [ --enable-all-warnings enable all useful warnings gcc can issue],
221 all_warnings=$enableval)
222 AC_SUBST(all_warnings)
226 # The way shlib-versions is used to generate soversions.mk uses a
227 # fairly simplistic model for name recognition that can't distinguish
228 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
229 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
230 # tell. This doesn't get used much beyond that, so it's fairly safe.
235 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
239 # We keep the original values in `$config_*' and never modify them, so we
240 # can write them unchanged into config.make. Everything else uses
241 # $machine, $vendor, and $os, and changes them whenever convenient.
242 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
244 # Don't allow vendor == "unknown"
245 test "$config_vendor" = unknown && config_vendor=
246 config_os="`echo $config_os | sed 's/^unknown-//'`"
248 # Some configurations imply other options.
250 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
251 # These systems always use GNU tools.
252 gnu_ld=yes gnu_as=yes ;;
255 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
256 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
258 gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
259 # These systems (almost) always use the ELF format.
263 # These systems are always xcoff
269 machine=$config_machine
270 vendor=$config_vendor
273 # config.guess on some IBM machines says `rs6000' instead of `powerpc'.
275 if test "$machine" = rs6000; then
280 ### I put this here to prevent those annoying emails from people who cannot
281 ### read and try to compile glibc on unsupported platforms. --drepper
283 ### By using the undocumented --enable-hacker-mode option for configure
284 ### one can skip this test to make the configuration not fail for unsupported
287 if test -z "$enable_hacker_mode"; then
288 case "$machine-$host_os" in
289 *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
292 echo "*** The GNU C library is currently not available for this platform."
293 echo "*** So far nobody cared to port it and if there is no volunteer it"
294 echo "*** might never happen. So, if you have interest to see glibc on"
295 echo "*** this platform visit"
296 echo "*** http://www.gnu.org/software/libc/porting.html"
297 echo "*** and join the group of porters"
303 dnl We need to use [ and ] for other purposes for a while now.
305 # Expand the configuration machine name into a subdirectory by architecture
306 # type and particular chip.
308 a29k | am29000) base_machine=a29k machine=a29k ;;
309 alpha*) base_machine=alpha machine=alpha/$machine ;;
310 arm*) base_machine=arm machine=arm/arm32/$machine ;;
311 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
312 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
313 hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
314 hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
315 i[3456]86) base_machine=i386 machine=i386/$machine ;;
316 ia64) base_machine=ia64 machine=ia64 ;;
317 m680?0) base_machine=m68k machine=m68k/$machine ;;
318 m68k) base_machine=m68k machine=m68k/m68020 ;;
319 m88???) base_machine=m88k machine=m88k/$machine ;;
320 m88k) base_machine=m88k machine=m88k/m88100 ;;
321 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
322 mips*) base_machine=mips machine=mips/$machine ;;
323 powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
324 powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
325 s390) base_machine=s390 machine=s390/s390-32 ;;
326 s390x) base_machine=s390 machine=s390/s390-64 ;;
327 sh3*) base_machine=sh machine=sh/sh3 ;;
328 sh4*) base_machine=sh machine=sh/sh4 ;;
330 base_machine=sparc machine=sparc/sparc32 ;;
331 sparcv8 | supersparc | hypersparc)
332 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
333 sparcv8plus | sparcv8plusa | sparcv9)
334 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
335 sparcv8plusb | sparcv9b)
336 base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
337 sparc64 | ultrasparc)
338 base_machine=sparc machine=sparc/sparc64 ;;
339 sparc64b | ultrasparc3)
340 base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
341 thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
342 *) base_machine=$machine ;;
345 AC_SUBST(base_machine)
347 if test "$base_machine" = "i386"; then
348 AC_DEFINE(USE_REGPARMS)
351 # Compute the list of sysdep directories for this configuration.
352 # This can take a while to compute.
353 sysdep_dir=$srcdir/sysdeps
354 AC_MSG_CHECKING(sysdep dirs)
355 dnl We need to use [ and ] for other purposes for a while now.
357 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
358 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
363 netbsd* | 386bsd* | freebsd* | bsdi*)
364 base_os=unix/bsd/bsd4.4 ;;
365 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
367 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
370 base_os=unix/sysv/irix6/$os ;;
372 base_os=unix/sysv/sysv4 ;;
374 base_os=unix/sysv/hpux/$os ;;
376 base_os=unix/sysv/aix/aix4.3 ;;
378 base_os=standalone ;;
383 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
386 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
390 o=`echo $tail | sed 's/[0-9]*$//'`
391 if test $o != $tail; then
394 # For linux-gnu, try linux-gnu, then linux.
395 o=`echo $tail | sed 's/-.*$//'`
396 if test $o != $tail; then
400 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
403 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
409 # For sparc/sparc32, try sparc/sparc32 and then sparc.
412 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
414 # Prepend the machine's FPU directory unless --without-fp.
415 if test "$with_fp" = yes; then
422 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
425 # Find what sysdep directories exist.
427 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
428 for d in $add_ons_pfx ''; do
429 for b in $base ''; do
430 for m0 in $mach ''; do
431 for v in /$vendor ''; do
432 test "$v" = / && continue
433 for o in /$ostry ''; do
434 test "$o" = / && continue
435 for m in $mach ''; do
436 if test "$m0$b$v$o$m"; then
437 try="${d}sysdeps$m0$b$v$o$m"
438 test -n "$enable_debug_configure" &&
439 echo "$0 [DEBUG]: try $try" >&2
440 if test -d $srcdir/$try; then
441 sysnames="$sysnames $try"
442 { test -n "$o" || test -n "$b"; } && os_used=t
443 { test -n "$m" || test -n "$m0"; } && machine_used=t
454 if test -z "$os_used" && test "$os" != none; then
455 AC_MSG_ERROR(Operating system $os is not supported.)
457 if test -z "$machine_used" && test "$machine" != none; then
458 AC_MSG_ERROR(The $machine is not supported.)
461 # We have now validated the configuration.
464 # If using ELF, look for an `elf' subdirectory of each machine directory.
465 # We prepend these rather than inserting them whereever the machine appears
466 # because things specified by the machine's ELF ABI should override
467 # OS-specific things, and should always be the same for any OS on the
468 # machine (otherwise what's the point of an ABI?).
469 if test "$elf" = yes; then
471 for d in $add_ons_pfx ''; do
473 if test -d $srcdir/${d}sysdeps$m/elf; then
474 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
478 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
482 # Expand the list of system names into a full list of directories
483 # from each element's parent name and Implies file (if present).
486 while test $# -gt 0; do
490 case " $names " in *" $name "*)
491 # Already in the list.
495 # Report each name as we discover it, so there is no long pause in output.
496 echo $ac_n "$name $ac_c" >&AC_FD_MSG
498 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
502 *) xsrcdir=$srcdir/ ;;
504 test -n "$enable_debug_configure" &&
505 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
507 if test -f $xsrcdir$name/Implies; then
508 # Collect more names from the `Implies' file (removing comments).
509 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
511 for x in $implied_candidate; do
513 if test -d $xsrcdir$name_base/$x; then
514 implied="$implied $name_base/$x";
517 for d in $add_ons_pfx ''; do
521 *) try_srcdir=$srcdir/ ;;
523 test -n "$enable_debug_configure" &&
524 echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
525 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
527 implied="$implied $try"
531 if test $found = no; then
532 AC_MSG_WARN($name/Implies specifies nonexistent $x)
539 # Add NAME to the list of names.
542 # Find the parent of NAME, using the empty string if it has none.
544 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
547 # Add the names implied by NAME, and NAME's parent (if it has one), to
548 # the list of names to be processed (the argument list). We prepend the
549 # implied names to the list and append the parent. We want implied
550 # directories to come before further directories inferred from the
551 # configuration components; this ensures that for sysv4, unix/common
552 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
554 sysnames="`echo $implied $* $parent`"
555 test -n "$sysnames" && set $sysnames
558 # Add the default directories.
559 default_sysnames=sysdeps/generic
560 if test "$elf" = yes; then
561 default_sysnames="sysdeps/generic/elf $default_sysnames"
563 sysnames="$names $default_sysnames"
565 # The other names were emitted during the scan.
566 AC_MSG_RESULT($default_sysnames)
572 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
573 # The makefiles need to use a different form to find it in $srcdir.
574 INSTALL='\$(..)./scripts/install-sh -c'
578 # We need the physical current working directory. We cannot use the
579 # "pwd -P" shell builtin since that's not portable. Instead we try to
580 # find a pwd binary. Note that assigning to the PWD environment
581 # variable might have some interesting side effects, so we don't do
583 AC_PATH_PROG(PWD_P, pwd, no)
584 if test "$PWD_P" = no; then
585 AC_MSG_ERROR(*** A pwd binary could not be found.)
588 # These programs are version sensitive.
589 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
590 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
591 [version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]*],
592 critic_missing="$critic_missing gcc")
593 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
594 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
595 [3.79* | 3.[89]*], critic_missing="$critic_missing make")
598 if test -n "$critic_missing"; then
600 *** These critical programs are missing or too old:$critic_missing
601 *** Check the INSTALL file for required versions.])
605 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
606 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
607 [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
608 MSGFMT=: aux_missing="$aux_missing msgfmt")
609 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
610 [GNU texinfo.* \([0-9][0-9.]*\)],
612 MAKEINFO=: aux_missing="$aux_missing makeinfo")
613 AC_CHECK_PROG_VER(SED, sed, --version,
614 [GNU sed version \([0-9]*\.[0-9.]*\)],
615 [3.0[2-9]*|3.[1-9]*|[4-9]*],
616 SED=: aux_missing="$aux_missing sed")
618 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
620 xno|x|x:) AUTOCONF=no ;;
623 whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
624 if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
625 libc_cv_autoconf_works=yes
627 libc_cv_autoconf_works=no
629 test $libc_cv_autoconf_works = yes || AUTOCONF=no
632 test "x$AUTOCONF" != xno || aux_missing="$aux_missing autoconf"
636 if test $host != $build; then
637 AC_CHECK_PROGS(BUILD_CC, gcc cc)
639 AC_SUBST(cross_compiling)
642 AC_CHECK_TOOL(MIG, mig, MISSING)
644 # Accept binutils 2.10.1 or newer (and also any ia64 2.9 version)
645 # XXX Commented out because it filters out too many good versions.
647 # AC_CHECK_PROG_VER(AS, $AS, --version,
648 # [GNU assembler.* \([0-9]*\.[0-9.]*\(-ia64-[0-9]*\)*\)],
649 # [2.10.[1-9]* | 2.1[1-9]* | 2.9-ia64-*], AS=: critic_missing=t)
651 test -n "$aux_missing" && AC_MSG_WARN([
652 *** These auxiliary programs are missing or incompatible versions:$aux_missing
653 *** some features will be disabled.
654 *** Check the INSTALL file for required versions.])
656 # glibcbug.in wants to know the compiler version.
657 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
660 # if using special system headers, find out the compiler's sekrit
661 # header directory and add that to the list. NOTE: Only does the right
662 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
663 if test -n "$sysheaders"; then
664 ccheaders=`$CC -print-file-name=include`
665 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
667 AC_SUBST(SYSINCLUDES)
669 # check if ranlib is necessary
670 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
671 cat > conftest.c <<EOF
676 $CC $CFLAGS -c conftest.c
677 $AR cr conftest.a conftest.o
678 cp conftest.a conftest2.a
680 if cmp -s conftest.a conftest2.a; then
681 libc_cv_ranlib_necessary=no
683 libc_cv_ranlib_necessary=yes
686 if test "$libc_cv_ranlib_necessary" = no; then
690 # Test if LD_LIBRARY_PATH contains the notation for the current directory
691 # since this would lead to problems installing/building glibc.
692 # LD_LIBRARY_PATH contains the current directory if one of the following
694 # - one of the terminals (":" and ";") is the first or last sign
695 # - two terminals occur directly after each other
696 # - the path contains an element with a dot in it
697 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
699 case ${LD_LIBRARY_PATH} in
700 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
701 ld_library_path_setting="contains current directory"
704 ld_library_path_setting="ok"
708 AC_MSG_RESULT($ld_library_path_setting)
709 if test "$ld_library_path_setting" != "ok"; then
711 *** LD_LIBRARY_PATH shouldn't contain the current directory when
712 *** building glibc. Please change the environment variable
713 *** and run configure again.])
716 AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
717 if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
718 libc_cv_gcc_static_libgcc=
720 libc_cv_gcc_static_libgcc=-static-libgcc
722 AC_SUBST(libc_cv_gcc_static_libgcc)
724 AC_PATH_PROG(BASH, bash, no)
725 if test "$BASH" != no &&
726 $BASH -c 'test "$BASH_VERSINFO" \
727 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
728 libc_cv_have_bash2=yes
730 libc_cv_have_bash2=no
732 AC_SUBST(libc_cv_have_bash2)
734 dnl We need a ksh compatible shell for tzselect.
735 if test "$BASH" = no; then
736 AC_PATH_PROG(KSH, ksh, no)
737 if test "$KSH" = no; then
747 AC_SUBST(libc_cv_have_ksh)
750 AC_PATH_PROG(PERL, perl, no)
751 if test "$PERL" != no &&
752 (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
755 AC_PATH_PROG(INSTALL_INFO, install-info, no,
756 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
757 if test "$INSTALL_INFO" != "no"; then
758 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
760 # There is a hard ^_ on the next line. I am open to better ideas.
762 echo 'File: dir Node: Top This is the top of the INFO tree'
763 echo '* Menu:') >conftest.d/dir
764 (echo 'INFO-DIR-SECTION i-d-s works'
765 echo 'START-INFO-DIR-ENTRY'
766 echo '* Prog: (prog). Program.'
767 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
768 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
770 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
771 then libc_cv_old_debian_install_info=no
772 else libc_cv_old_debian_install_info=yes
774 else libc_cv_old_debian_install_info=no testfailed=t
777 if test -n "$testfailed"
778 then AC_MSG_WARN([install-info errored out, check config.log])
780 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
782 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
784 AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
786 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
787 echo '#include <stddef.h>
788 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
789 if eval "$ac_cpp conftest.c 2>/dev/null" \
790 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
791 libc_cv_signed_size_t=no
793 libc_cv_signed_size_t=yes
796 if test $libc_cv_signed_size_t = yes; then
797 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
798 cat >> confdefs.h <<\EOF
800 #define __SIZE_TYPE__ unsigned
804 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
806 [#define __need_size_t
807 #define __need_wchar_t
810 #include <stddef.h>], [size_t size; wchar_t wchar;
812 #error stddef.h ignored __need_*
814 if (&size == NULL || &wchar == NULL) abort ();],
815 libc_cv_friendly_stddef=yes,
816 libc_cv_friendly_stddef=no)])
817 if test $libc_cv_friendly_stddef = yes; then
818 config_vars="$config_vars
819 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
822 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
823 libc_cv_need_minus_P, [dnl
824 cat > conftest.S <<EOF
825 #include "confdefs.h"
826 /* Nothing whatsoever. */
828 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
829 libc_cv_need_minus_P=no
831 libc_cv_need_minus_P=yes
834 if test $libc_cv_need_minus_P = yes; then
835 config_vars="$config_vars
836 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
839 AC_MSG_CHECKING(whether .text pseudo-op must be used)
840 AC_CACHE_VAL(libc_cv_dot_text, [dnl
841 cat > conftest.s <<EOF
845 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
846 libc_cv_dot_text=.text
849 if test -z "$libc_cv_dot_text"; then
855 AC_CACHE_CHECK(for assembler global-symbol directive,
856 libc_cv_asm_global_directive, [dnl
857 libc_cv_asm_global_directive=UNKNOWN
858 for ac_globl in .globl .global .EXPORT; do
859 cat > conftest.s <<EOF
864 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
865 libc_cv_asm_global_directive=${ac_globl}
868 test $libc_cv_asm_global_directive != UNKNOWN && break
870 if test $libc_cv_asm_global_directive = UNKNOWN; then
871 AC_MSG_ERROR(cannot determine asm global directive)
873 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
876 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
877 cat > conftest.s <<EOF
880 .set glibc_conftest_frobozz,foo
881 $libc_cv_asm_global_directive glibc_conftest_frobozz
883 # The alpha-dec-osf1 assembler gives only a warning for `.set'
884 # (but it doesn't work), so we must do a linking check to be sure.
885 cat > conftest1.c <<\EOF
886 extern int glibc_conftest_frobozz;
887 main () { printf ("%d\n", glibc_conftest_frobozz); }
889 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
890 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
891 libc_cv_asm_set_directive=yes
893 libc_cv_asm_set_directive=no
896 if test $libc_cv_asm_set_directive = yes; then
897 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
900 AC_CACHE_CHECK(for assembler .type directive prefix,
901 libc_cv_asm_type_prefix, [dnl
902 libc_cv_asm_type_prefix=no
903 for ac_try_prefix in '@' '%' '#'; do
904 cat > conftest.s <<EOF
906 ${libc_cv_asm_global_directive} foo
907 .type foo, ${ac_try_prefix}object
912 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
913 libc_cv_asm_type_prefix=${ac_try_prefix}
916 test "x$libc_cv_asm_type_prefix" != xno && break
918 if test "x$libc_cv_asm_type_prefix" != xno; then
919 AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
922 # The Aix ld uses global .symbol_names instead of symbol_names.
923 # Unfortunately also used in the PPC64 ELF ABI.
924 case "${os}${machine}" in
925 aix4.3* | linux*powerpc/powerpc64*)
926 AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
929 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
930 [cat > conftest.s <<EOF
933 .symver _sym,sym@VERS
935 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
936 libc_cv_asm_symver_directive=yes
938 libc_cv_asm_symver_directive=no
941 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
942 if test $libc_cv_asm_symver_directive = yes; then
943 cat > conftest.s <<EOF
946 .symver _sym,sym@VERS
948 cat > conftest.map <<EOF
957 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
958 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
959 -nostartfiles -nostdlib
960 -Wl,--version-script,conftest.map
963 libc_cv_ld_version_script_option=yes
965 libc_cv_ld_version_script_option=no
968 libc_cv_ld_version_script_option=no
971 libc_cv_ld_version_script_option=no
974 if test $shared != no &&
975 test $libc_cv_asm_symver_directive = yes &&
976 test $libc_cv_ld_version_script_option = yes &&
977 test $enable_versioning = yes; then
979 AC_DEFINE(DO_VERSIONING)
985 if test $elf = yes && test $shared != no && test $VERSIONING = no; then
987 *** WARNING: You should not compile GNU libc without versioning. Not using
988 *** versioning will introduce incompatibilities so that old binaries
989 *** will not run anymore.
990 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
992 if test $elf = yes; then
993 AC_CACHE_CHECK(for .previous assembler directive,
994 libc_cv_asm_previous_directive, [dnl
995 cat > conftest.s <<EOF
999 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
1000 libc_cv_asm_previous_directive=yes
1002 libc_cv_asm_previous_directive=no
1005 if test $libc_cv_asm_previous_directive = yes; then
1006 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
1008 AC_CACHE_CHECK(for .popsection assembler directive,
1009 libc_cv_asm_popsection_directive, [dnl
1010 cat > conftest.s <<EOF
1011 .pushsection foo_section
1014 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
1015 libc_cv_asm_popsection_directive=yes
1017 libc_cv_asm_popsection_directive=no
1020 if test $libc_cv_asm_popsection_directive = yes; then
1021 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
1024 AC_CACHE_CHECK(for .protected and .hidden assembler directive,
1025 libc_cv_asm_protected_directive, [dnl
1026 cat > conftest.s <<EOF
1032 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
1033 libc_cv_asm_protected_directive=yes
1035 libc_cv_asm_protected_directive=no
1038 AC_SUBST(libc_cv_asm_protected_directive)
1039 AC_DEFINE(HAVE_PROTECTED)
1040 AC_DEFINE(HAVE_HIDDEN)
1042 if test $libc_cv_asm_protected_directive = yes; then
1043 AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
1044 libc_cv_visibility_attribute,
1045 [cat > conftest.c <<EOF
1046 int foo __attribute__ ((visibility ("hidden"))) = 1;
1047 int bar __attribute__ ((visibility ("protected"))) = 1;
1049 libc_cv_visibility_attribute=no
1050 if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
1051 if grep '\.hidden.*foo' conftest.s >/dev/null; then
1052 if grep '\.protected.*bar' conftest.s >/dev/null; then
1053 libc_cv_visibility_attribute=yes
1059 if test $libc_cv_visibility_attribute = yes; then
1060 AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
1064 if test $libc_cv_visibility_attribute = yes; then
1065 AC_CACHE_CHECK(for broken __attribute__((visibility())),
1066 libc_cv_broken_visibility_attribute,
1067 [cat > conftest.c <<EOF
1069 int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
1070 int bar (int x) { return x; }
1072 libc_cv_broken_visibility_attribute=yes
1073 if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
1075 if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
1077 libc_cv_broken_visibility_attribute=no
1080 rm -f conftest.c conftest.s
1082 if test $libc_cv_broken_visibility_attribute = yes; then
1083 AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
1087 AC_CACHE_CHECK(for broken __attribute__((alias())),
1088 libc_cv_broken_alias_attribute,
1089 [cat > conftest.c <<EOF
1090 extern int foo (int x) __asm ("xyzzy");
1091 int bar (int x) { return x; }
1092 extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
1094 extern __typeof (dfoo) dfoo __asm ("abccb");
1097 libc_cv_broken_alias_attribute=yes
1098 if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
1099 if grep 'xyzzy' conftest.s >/dev/null &&
1100 grep 'abccb' conftest.s >/dev/null; then
1101 libc_cv_broken_alias_attribute=no
1104 rm -f conftest.c conftest.s
1106 if test $libc_cv_broken_alias_attribute = yes; then
1107 AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
1110 if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
1111 AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
1112 libc_cv_have_sdata_section,
1113 [echo "int i;" > conftest.c
1114 libc_cv_have_sdata_section=no
1115 if ${CC-cc} -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
1116 | grep '\.sdata' >/dev/null; then
1117 libc_cv_have_sdata_section=yes
1119 rm -f conftest.c conftest.so
1121 if test $libc_cv_have_sdata_section = yes; then
1122 AC_DEFINE(HAVE_SDATA_SECTION)
1126 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
1127 libc_cv_initfinit_array, [dnl
1128 cat > conftest.c <<EOF
1129 int _start (void) { return 0; }
1130 int __start (void) { return 0; }
1131 int foo (void) { return 1; }
1132 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
1134 if AC_TRY_COMMAND([${CC-cc} -o conftest conftest.c
1135 -static -nostartfiles -nostdlib 1>&AC_FD_CC])
1137 if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
1138 libc_cv_initfinit_array=yes
1140 libc_cv_initfinit_array=no
1143 libc_cv_initfinit_array=no
1146 AC_SUBST(libc_cv_initfinit_array)
1147 if test $libc_cv_initfinit_array = yes; then
1148 AC_DEFINE(HAVE_INITFINI_ARRAY)
1151 AC_CACHE_CHECK(for -z nodelete option,
1152 libc_cv_z_nodelete, [dnl
1153 cat > conftest.c <<EOF
1154 int _start (void) { return 42; }
1156 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1157 -nostartfiles -nostdlib
1158 -Wl,--enable-new-dtags,-z,nodelete 1>&AC_FD_CC])
1160 libc_cv_z_nodelete=yes
1162 libc_cv_z_nodelete=no
1165 AC_SUBST(libc_cv_z_nodelete)
1167 AC_CACHE_CHECK(for -z nodlopen option,
1168 libc_cv_z_nodlopen, [dnl
1169 cat > conftest.c <<EOF
1170 int _start (void) { return 42; }
1172 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1173 -nostartfiles -nostdlib
1174 -Wl,--enable-new-dtags,-z,nodlopen 1>&AC_FD_CC])
1176 libc_cv_z_nodlopen=yes
1178 libc_cv_z_nodlopen=no
1181 AC_SUBST(libc_cv_z_nodlopen)
1183 AC_CACHE_CHECK(for -z initfirst option,
1184 libc_cv_z_initfirst, [dnl
1185 cat > conftest.c <<EOF
1186 int _start (void) { return 42; }
1188 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1189 -nostartfiles -nostdlib
1190 -Wl,--enable-new-dtags,-z,initfirst 1>&AC_FD_CC])
1192 libc_cv_z_initfirst=yes
1194 libc_cv_z_initfirst=no
1197 AC_SUBST(libc_cv_z_initfirst)
1199 AC_CACHE_CHECK(for -Bgroup option,
1200 libc_cv_Bgroup, [dnl
1201 cat > conftest.c <<EOF
1202 int _start (void) { return 42; }
1204 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c -Wl,-Bgroup -nostdlib 1>&AC_FD_CC])
1211 AC_SUBST(libc_cv_Bgroup)
1213 AC_CACHE_CHECK(for -z combreloc,
1214 libc_cv_z_combreloc, [dnl
1215 cat > conftest.c <<EOF
1216 extern int bar (int);
1218 int foo (void) { return bar (mumble); }
1220 if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
1221 -nostdlib -nostartfiles
1222 -Wl,-z,combreloc 1>&AC_FD_CC])
1224 dnl The following test is a bit weak. We must use a tool which can test
1225 dnl cross-platform since the gcc used can be a cross compiler. Without
1226 dnl introducing new options this is not easily doable. Instead use a tool
1227 dnl which always is cross-platform: readelf. To detect whether -z combreloc
1228 dnl look for a section named .rel.dyn.
1229 if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
1230 libc_cv_z_combreloc=yes
1232 libc_cv_z_combreloc=no
1235 libc_cv_z_combreloc=no
1238 if test "$libc_cv_z_combreloc" = yes; then
1239 AC_DEFINE(HAVE_Z_COMBRELOC)
1242 AC_SUBST(libc_cv_z_combreloc)
1244 if test $elf != yes; then
1245 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
1246 [AC_TRY_COMPILE(, [asm (".section .init");
1247 asm (".section .fini");
1248 asm ("${libc_cv_dot_text}");],
1249 libc_cv_have_initfini=yes,
1250 libc_cv_have_initfini=no)])
1251 AC_SUBST(libc_cv_have_initfini)dnl
1252 if test $libc_cv_have_initfini = yes; then
1253 AC_DEFINE(HAVE_INITFINI)
1257 if test $elf = yes -a $gnu_ld = yes; then
1258 AC_CACHE_CHECK(whether cc puts quotes around section names,
1259 libc_cv_have_section_quotes,
1260 [cat > conftest.c <<EOF
1261 static const int foo
1262 __attribute__ ((section ("bar"))) = 1;
1264 if ${CC-cc} -S conftest.c -o conftest.s; then
1265 if grep '\.section.*"bar"' conftest.s >/dev/null; then
1266 libc_cv_have_section_quotes=yes
1268 libc_cv_have_section_quotes=no
1271 libc_cv_have_section_quotes=unknown
1275 if test $libc_cv_have_section_quotes = yes; then
1276 AC_DEFINE(HAVE_SECTION_QUOTES)
1280 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
1281 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
1282 [cat > conftest.$ac_ext <<EOF
1283 dnl This sometimes fails to find confdefs.h, for some reason.
1284 dnl [#]line __oline__ "[$]0"
1285 [#]line __oline__ "configure"
1286 #include "confdefs.h"
1287 void underscore_test(void) {
1290 if AC_TRY_EVAL(ac_compile); then
1291 if grep _underscore_test conftest* >/dev/null; then
1292 ifelse([$1], , :, [rm -f conftest*
1295 ifelse([$2], , , [rm -f conftest*
1299 echo "configure: failed program was:" >&AC_FD_CC
1300 cat conftest.$ac_ext >&AC_FD_CC
1301 ifelse([$2], , , [rm -f conftest*
1306 if test $elf = yes; then
1307 libc_cv_asm_underscores=no
1309 if test $ac_cv_prog_cc_works = yes; then
1310 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1311 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
1312 libc_cv_asm_underscores=yes,
1313 libc_cv_asm_underscores=no)])
1315 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
1316 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
1317 libc_cv_asm_underscores=no)])
1320 if test $libc_cv_asm_underscores = no; then
1321 AC_DEFINE(NO_UNDERSCORES)
1324 if test $elf = yes; then
1325 libc_cv_weak_symbols=yes
1328 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
1330 cat > conftest.s <<EOF
1332 ${libc_cv_asm_global_directive} foo
1335 .weak bar; bar = foo
1337 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
1338 libc_cv_asm_weak_directive=yes
1340 libc_cv_asm_weak_directive=no
1344 if test $libc_cv_asm_weak_directive = no; then
1345 AC_CACHE_CHECK(for assembler .weakext directive,
1346 libc_cv_asm_weakext_directive,
1348 cat > conftest.s <<EOF
1350 ${libc_cv_asm_global_directive} foo
1354 ${libc_cv_asm_global_directive} baz
1357 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
1358 libc_cv_asm_weakext_directive=yes
1360 libc_cv_asm_weakext_directive=no
1366 if test $libc_cv_asm_weak_directive = yes; then
1367 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
1368 elif test $libc_cv_asm_weakext_directive = yes; then
1369 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
1372 dnl The standard hppa assembler uses `;' to start comments and `!'
1373 dnl as a line separator. CRIS uses `;' to start comments and `@' for
1375 case "${host_cpu}-${host_os}" in
1377 libc_cv_asm_line_sep='@'
1378 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1381 AC_CACHE_CHECK(for assembler line separator,
1382 libc_cv_asm_line_sep, [dnl
1383 cat > conftest.s <<EOF
1386 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
1387 libc_cv_asm_line_sep='!'
1389 if test -z "$enable_hacker_mode"; then
1390 echo "*** You need a newer assembler to compile glibc"
1394 libc_cv_asm_line_sep=';'
1397 AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
1401 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
1402 cat > conftest.c <<\EOF
1407 dnl No \ in command here because it ends up inside ''.
1408 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1409 -nostdlib -nostartfiles -Wl,--no-whole-archive
1410 -o conftest conftest.c 1>&AC_FD_CC]); then
1411 libc_cv_ld_no_whole_archive=yes
1413 libc_cv_ld_no_whole_archive=no
1416 if test $libc_cv_ld_no_whole_archive = yes; then
1417 no_whole_archive=-Wl,--no-whole-archive
1419 AC_SUBST(no_whole_archive)dnl
1421 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
1422 cat > conftest.c <<\EOF
1427 dnl No \ in command here because it ends up inside ''.
1428 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
1429 -nostdlib -nostartfiles -fexceptions
1430 -o conftest conftest.c 1>&AC_FD_CC]); then
1431 libc_cv_gcc_exceptions=yes
1433 libc_cv_gcc_exceptions=no
1436 if test $libc_cv_gcc_exceptions = yes; then
1437 exceptions=-fexceptions
1439 AC_SUBST(exceptions)dnl
1441 if test "$base_machine" = alpha ; then
1442 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
1443 cat > conftest.c <<\EOF
1447 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
1449 libc_cv_gcc_alpha_ng_prefix=yes
1451 libc_cv_gcc_alpha_ng_prefix=no
1454 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
1455 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
1457 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
1461 if test "$host_cpu" = powerpc ; then
1462 # Check for a bug present in at least versions 2.8.x of GCC
1463 # and versions 1.0.x of EGCS.
1464 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1465 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1466 libc_cv_c_asmcr0_bug='no',
1467 libc_cv_c_asmcr0_bug='yes')])
1468 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1469 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1473 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1474 [cat > conftest.c <<EOF
1475 #line __oline__ "configure"
1476 static char *__EH_FRAME_BEGIN__;
1479 #ifdef CHECK__register_frame
1480 __register_frame (__EH_FRAME_BEGIN__);
1481 __deregister_frame (__EH_FRAME_BEGIN__);
1483 #ifdef CHECK__register_frame_info
1484 __register_frame_info (__EH_FRAME_BEGIN__);
1485 __deregister_frame_info (__EH_FRAME_BEGIN__);
1490 /* FIXME: this is fragile. */
1499 dl_iterate_phdr () {}
1501 dnl No \ in command here because it ends up inside ''.
1502 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1503 -nostdlib -nostartfiles
1504 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1505 libc_cv_gcc_dwarf2_unwind_info=static
1507 libc_cv_gcc_dwarf2_unwind_info=no
1509 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1510 -nostdlib -nostartfiles
1511 -o conftest conftest.c -lgcc -lgcc_eh >&AC_FD_CC]); then
1512 if ${CC-cc} $CFLAGS -DCHECK__register_frame_info -nostdlib -nostartfiles \
1513 -o conftest conftest.c -lgcc -lgcc_eh -v 2>&1 >/dev/null \
1514 | grep -q -- --eh-frame-hdr; then
1515 libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
1517 libc_cv_gcc_dwarf2_unwind_info=static
1520 libc_cv_gcc_dwarf2_unwind_info=no
1522 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1523 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1524 -nostdlib -nostartfiles
1525 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1526 libc_cv_gcc_dwarf2_unwind_info=yes
1528 libc_cv_gcc_dwarf2_unwind_info=no
1532 case $libc_cv_gcc_dwarf2_unwind_info in
1534 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1537 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1538 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1542 dnl Check whether compiler understands __builtin_expect.
1543 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1544 [cat > conftest.c <<EOF
1545 #line __oline__ "configure"
1548 a = __builtin_expect (a, 10);
1549 return a == 10 ? 0 : 1;
1552 dnl No \ in command here because it ends up inside ''.
1553 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1554 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1555 libc_cv_gcc_builtin_expect=yes
1557 libc_cv_gcc_builtin_expect=no
1560 if test "$libc_cv_gcc_builtin_expect" = yes; then
1561 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1564 AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
1565 cat > conftest.c <<\EOF
1568 __builtin_memset (x, 0, 1000);
1572 if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
1574 libc_cv_gcc_builtin_memset=no
1576 libc_cv_gcc_builtin_memset=yes
1579 if test "$libc_cv_gcc_builtin_memset" = yes ; then
1580 AC_DEFINE(HAVE_BUILTIN_MEMSET)
1583 dnl Check whether the compiler supports subtraction of local labels.
1584 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1585 [cat > conftest.c <<EOF
1587 #line __oline__ "configure"
1590 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1591 void *p = &&l1 + ar[a];
1600 dnl No \ in command here because it ends up inside ''.
1601 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1602 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1603 libc_cv_gcc_subtract_local_labels=yes
1605 libc_cv_gcc_subtract_local_labels=no
1608 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1609 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1612 dnl Check whether the compiler supports the __thread keyword.
1613 AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
1614 [cat > conftest.c <<\EOF
1615 __thread int a = 42;
1617 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AC_FD_CC]); then
1618 libc_cv_gcc___thread=yes
1620 libc_cv_gcc___thread=no
1623 if test "$libc_cv_gcc___thread" = yes; then
1624 AC_DEFINE(HAVE___THREAD)
1628 dnl Check whether we have the gd library available.
1629 AC_MSG_CHECKING(for libgd)
1630 if test "$with_gd" != "no"; then
1631 old_CFLAGS="$CFLAGS"
1632 CFLAGS="$CFLAGS $libgd_include"
1633 old_LDFLAGS="$LDFLAGS"
1634 LDFLAGS="$LDFLAGS $libgd_ldflags"
1636 LIBS="$LIBS -lgd -lpng -lz -lm"
1637 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1638 CFLAGS="$old_CFLAGS"
1639 LDFLAGS="$old_LDFLAGS"
1644 AC_MSG_RESULT($LIBGD)
1647 dnl check for the size of 'long double'.
1648 AC_CHECK_SIZEOF(long double, 0)
1649 sizeof_long_double=$ac_cv_sizeof_long_double
1650 AC_SUBST(sizeof_long_double)
1652 ### End of automated tests.
1653 ### Now run sysdeps configure fragments.
1655 # sysdeps configure fragments may set these with files to be linked below.
1659 # They also can set these variables.
1661 ldd_rewrite_script=no
1662 libc_cv_sysconfdir=$sysconfdir
1663 libc_cv_gcc_unwind_find_fde=no
1665 # Iterate over all the sysdep directories we will use, running their
1666 # configure fragments, and looking for a uname implementation.
1668 for dir in $sysnames; do
1671 *) dest=$srcdir/$dir ;;
1673 if test -r $dest/configure; then
1674 AC_MSG_RESULT(running configure fragment for $dest)
1678 if test -z "$uname"; then
1679 if test -r $dest/uname.c ||
1680 test -r $dest/uname.S ||
1681 { test -r $dest/syscalls.list &&
1682 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1689 if test x$libc_cv_gcc_unwind_find_fde = xyes; then
1690 AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
1692 AC_SUBST(libc_cv_gcc_unwind_find_fde)
1694 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1696 # If we will use the generic uname implementation, we must figure out what
1697 # it will say by examining the system, and write the results in config-name.h.
1698 if test "$uname" = "sysdeps/generic"; then
1701 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1703 if test $uname_sysname != $config_os; then
1704 config_release=`echo $config_os | sed s/$uname_sysname//`
1707 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1708 if test -r /vmunix; then
1709 kernel_id=`strings /vmunix | grep UNIX`
1710 elif test -r /dynix; then
1711 kernel_id=`strings /dynix | grep DYNIX`
1717 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1718 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1720 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1722 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1723 != x$config_release; then
1724 # The configuration release is a substring of the kernel release.
1725 libc_cv_uname_release=$kernel_release
1726 elif test x$config_release != x; then
1727 libc_cv_uname_release=$config_release
1728 elif test x$kernel_release != x; then
1729 libc_cv_uname_release=$kernel_release
1731 libc_cv_uname_release=unknown
1733 uname_release="$libc_cv_uname_release"
1735 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1736 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1738 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1740 if test -n "$kernel_version"; then
1741 libc_cv_uname_version="$kernel_version"
1743 libc_cv_uname_version=unknown
1745 uname_version="$libc_cv_uname_version"
1747 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1748 config_uname=config-name.h:config-name.in
1750 # For non-generic uname, we don't need to create config-name.h at all.
1754 dnl This is tested by existing code and it's simpler to avoid changing it.
1755 AC_DEFINE(USE_IN_LIBIO)
1757 # Test for old glibc 2.0.x headers so that they can be removed properly
1758 # Search only in includedir.
1759 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1760 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1762 old_glibc_headers=yes
1764 old_glibc_headers=no
1766 AC_MSG_RESULT($old_glibc_headers)
1767 if test ${old_glibc_headers} = yes; then
1768 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1769 AC_MSG_WARN(*** be removed.)
1771 AC_SUBST(old_glibc_headers)
1773 AC_SUBST(libc_cv_slibdir)
1774 AC_SUBST(libc_cv_localedir)
1775 AC_SUBST(libc_cv_sysconfdir)
1776 AC_SUBST(libc_cv_rootsbindir)
1778 AC_SUBST(use_ldconfig)
1779 AC_SUBST(ldd_rewrite_script)
1781 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
1782 if test $gnu_ld = yes; then
1783 AC_DEFINE(HAVE_GNU_LD)
1785 if test $gnu_as = yes; then
1786 AC_DEFINE(HAVE_GNU_AS)
1788 if test $elf = yes; then
1791 if test $xcoff = yes; then
1792 AC_DEFINE(HAVE_XCOFF)
1797 if test $shared = default; then
1798 if test $gnu_ld = yes; then
1801 # For now we do not assume shared libs are available. In future more
1802 # tests might become available.
1807 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1809 cat > conftest.c <<EOF
1810 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1811 # error PIC is default.
1814 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1818 AC_SUBST(pic_default)
1823 AC_SUBST(static_nss)
1824 AC_SUBST(nopic_initfini)
1829 *door*) linux_doors=yes ;;
1830 *) linux_doors=no ;;
1832 AC_SUBST(linux_doors)
1834 dnl See sysdeps/mach/configure.in for this variable.
1835 AC_SUBST(mach_interface_list)
1837 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1840 config_makefile=Makefile
1843 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1844 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1848 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1849 case $CONFIG_FILES in *config.make*)
1850 echo "$config_vars" >> config.make;;
1852 test -d bits || mkdir bits], [config_vars='$config_vars'])