glibc/configure.in

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dnl Process this file with autoconf to produce a configure script.
AC_REVISION([$CVSid$])
AC_PREREQ(2.13)dnl dnl Minimum Autoconf version required.
AC_INIT(include/features.h)
AC_CONFIG_HEADER(config.h)
AC_CONFIG_AUX_DIR(scripts)
# This will get text that should go into config.make.
config_vars=
# Check for a --with-gmp argument and set gmp-srcdir in config.make.
AC_ARG_WITH(gmp, dnl
--with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
[dnl
case "$with_gmp" in
yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
''|no) ;;
*) config_vars="$config_vars
gmp-srcdir = $withval" ;;
esac
])
# Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
AC_ARG_WITH(gd, dnl
--with-gd=DIR find libgd include dir and library with prefix DIR,
[dnl
case "$with_gd" in
yes|''|no) ;;
*) libgd_include="-I$withval/include"
libgd_ldflags="-L$withval/lib" ;;
esac
])
AC_ARG_WITH(gd-include, dnl
--with-gd-include=DIR find libgd include files in DIR,
[dnl
case "$with_gd_include" in
''|no) ;;
*) libgd_include="-I$withval" ;;
esac
])
AC_ARG_WITH(gd-lib, dnl
--with-gd-lib=DIR find libgd library files in DIR,
[dnl
case "$with_gd_lib" in
''|no) ;;
*) libgd_ldflags="-L$withval" ;;
esac
])
if test -n "$libgd_include"; then
config_vars="$config_vars
CFLAGS-memusagestat.c = $libgd_include"
fi
if test -n "$libgd_ldflags"; then
config_vars="$config_vars
libgd-LDFLAGS = $libgd_ldflags"
fi
dnl Arguments to specify presence of other packages/features.
AC_ARG_WITH(fp, dnl
[ --with-fp if using floating-point hardware [default=yes]],
with_fp=$withval, with_fp=yes)
AC_SUBST(with_fp)
AC_ARG_WITH(binutils, dnl
--with-binutils=PATH specify location of binutils (as and ld),
path_binutils=$withval, path_binutils='')
AC_ARG_WITH(elf, dnl
--with-elf if using the ELF object format,
elf=$withval, elf=no)
AC_ARG_WITH(xcoff, dnl
--with-xcoff if using the XCOFF object format,
xcoff=$withval, xcoff=no)
AC_ARG_WITH(cvs, dnl
[ --without-cvs if CVS should not be used],
with_cvs=$withval, with_cvs=yes)
if test "$with_cvs" = yes; then
if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
then
with_cvs=no
fi
fi
AC_SUBST(with_cvs)
AC_ARG_WITH(headers, dnl
[ --with-headers=PATH location of system headers to use
[e.g. /usr/src/linux/include]
[default=compiler default]],
sysheaders=$withval, sysheaders='')
AC_ARG_ENABLE(sanity-checks, dnl
[ --disable-sanity-checks really do not use threads (should not be used
except in special situations) [default=yes]],
enable_sanity=$enableval, enable_sanity=yes)
dnl Arguments to enable or disable building the static, shared, profiled,
dnl and -fomit-frame-pointer libraries.
dnl I've disabled this for now since we cannot build glibc without static
dnl libraries built in the moment.
dnl AC_ARG_ENABLE(static, dnl
dnl [ --enable-static build static library [default=yes]],
dnl static=$enableval, static=yes)
static=yes
AC_ARG_ENABLE(shared, dnl
[ --enable-shared build shared library [default=yes if GNU ld & ELF]],
shared=$enableval, shared=default)
AC_ARG_ENABLE(profile, dnl
[ --enable-profile build profiled library [default=yes]],
profile=$enableval, profile=yes)
AC_ARG_ENABLE(omitfp, dnl
[ --enable-omitfp build undebuggable optimized library [default=no]],
omitfp=$enableval, omitfp=no)
AC_ARG_ENABLE(bounded, dnl
[ --enable-bounded build with runtime bounds checking [default=no]],
bounded=$enableval, bounded=no)
AC_ARG_ENABLE(versioning, dnl
[ --disable-versioning do not include versioning information in the
library objects [default=yes if supported]],
enable_versioning=$enableval, enable_versioning=yes)
AC_ARG_ENABLE(oldest-abi, dnl
[ --enable-oldest-abi=ABI configure the oldest ABI supported [e.g. 2.2]
[default=glibc default]],
oldest_abi=$enableval, oldest_abi=no)
if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
oldest_abi=default
else
AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
fi
AC_SUBST(oldest_abi)
dnl Generic infrastructure for drop-in additions to libc.
AC_ARG_ENABLE(add-ons, dnl
[ --enable-add-ons[=DIR1,DIR2]...
configure and build add-ons in DIR1,DIR2,...
search for add-ons if no parameter given],
[case "$enableval" in
yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
test "$add_ons" = "*" && add_ons= ;;
*) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
esac],
[add_ons=])
dnl Let the user avoid using TLS. Don't know why but...
AC_ARG_WITH(tls, dnl
[ --without-tls prevent support for TLS],
usetls=$withval, usetls=yes)
AC_CONFIG_SUBDIRS($add_ons)
add_ons_pfx=
if test x"$add_ons" != x; then
for f in $add_ons; do
# Some sanity checks
if test "$f" = "crypt"; then
AC_MSG_ERROR([
*** It seems that you're using an old \`crypt' add-on. crypt is now
*** part of glibc and using the old add-on will not work with this
*** release. Start again with fresh sources and without the old
*** \`crypt' add-on.])
fi
if test "$f" = "localedata"; then
AC_MSG_ERROR([
*** It seems that you're using an old \`localedata' add-on. localedata
*** is now part of glibc and using the old add-on will not work with
*** this release. Start again with fresh sources and without the old
*** \`localedata' add-on.])
fi
# Test whether such a subdir really exists.
if test -d $srcdir/$f; then
add_ons_pfx="$add_ons_pfx $f/"
else
AC_MSG_ERROR(add-on directory \"$f\" does not exist)
fi
done
fi
dnl On some platforms we cannot use dynamic loading. We must provide
dnl static NSS modules.
AC_ARG_ENABLE(static-nss, dnl
[ --enable-static-nss build static NSS modules [default=no]],
static_nss=$enableval, static_nss=no)
dnl Enable static NSS also if we build no shared objects.
if test x"$static_nss" = xyes || test x"$shared" = xno; then
static_nss=yes
AC_DEFINE(DO_STATIC_NSS)
fi
AC_ARG_ENABLE(force-install,
[ --disable-force-install don't force installation of files from this package,
even if they are older than the installed files],
force_install=$enableval, force_install=yes)
AC_SUBST(force_install)
dnl On some platforms we allow dropping compatibility with all kernel
dnl versions.
AC_ARG_ENABLE(kernel,
[ --enable-kernel=VERSION compile for compatibility with kernel not older
than VERSION],
minimum_kernel=$enableval)
dnl Prevent unreasonable values.
if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
# Better nothing than this.
minimum_kernel=""
else
if test "$minimum_kernel" = current; then
minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
fi
fi
dnl For the development we sometimes want gcc to issue even more warnings.
dnl This is not the default since many of the extra warnings are not
dnl appropriate.
AC_ARG_ENABLE(all-warnings,
[ --enable-all-warnings enable all useful warnings gcc can issue],
all_warnings=$enableval)
AC_SUBST(all_warnings)
AC_CANONICAL_HOST
# The way shlib-versions is used to generate soversions.mk uses a
# fairly simplistic model for name recognition that can't distinguish
# i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
# of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
# tell. This doesn't get used much beyond that, so it's fairly safe.
case "$host_os" in
linux*)
;;
gnu*)
host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
;;
esac
# We keep the original values in `$config_*' and never modify them, so we
# can write them unchanged into config.make. Everything else uses
# $machine, $vendor, and $os, and changes them whenever convenient.
config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
# Don't allow vendor == "unknown"
test "$config_vendor" = unknown && config_vendor=
config_os="`echo $config_os | sed 's/^unknown-//'`"
# Some configurations imply other options.
case "$host_os" in
gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
# These systems always use GNU tools.
gnu_ld=yes gnu_as=yes ;;
esac
case "$host_os" in
# i586-linuxaout is mangled into i586-pc-linux-gnuaout
linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
;;
gnu* | linux* | sysv4* | solaris2* | irix6*)
# These systems (almost) always use the ELF format.
elf=yes
;;
aix*)
# These systems are always xcoff
xcoff=yes
elf=no
;;
esac
machine=$config_machine
vendor=$config_vendor
os=$config_os
# config.guess on some IBM machines says `rs6000' instead of `powerpc'.
# Unify this here.
if test "$machine" = rs6000; then
machine="powerpc"
fi
###
### I put this here to prevent those annoying emails from people who cannot
### read and try to compile glibc on unsupported platforms. --drepper
###
### By using the undocumented --enable-hacker-mode option for configure
### one can skip this test to make the configuration not fail for unsupported
### platforms.
###
if test -z "$enable_hacker_mode"; then
case "$machine-$host_os" in
*-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
;;
*)
echo "*** The GNU C library is currently not available for this platform."
echo "*** So far nobody cared to port it and if there is no volunteer it"
echo "*** might never happen. So, if you have interest to see glibc on"
echo "*** this platform visit"
echo "*** http://www.gnu.org/software/libc/porting.html"
echo "*** and join the group of porters"
exit 1
;;
esac
fi
dnl We need to use [ and ] for other purposes for a while now.
changequote(,)dnl
# Expand the configuration machine name into a subdirectory by architecture
# type and particular chip.
case "$machine" in
a29k | am29000) base_machine=a29k machine=a29k ;;
alpha*) base_machine=alpha machine=alpha/$machine ;;
arm*) base_machine=arm machine=arm/arm32/$machine ;;
c3[012]) base_machine=cx0 machine=cx0/c30 ;;
c4[04]) base_machine=cx0 machine=cx0/c40 ;;
hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
i[3456]86) base_machine=i386 machine=i386/$machine ;;
ia64) base_machine=ia64 machine=ia64 ;;
m680?0) base_machine=m68k machine=m68k/$machine ;;
m68k) base_machine=m68k machine=m68k/m68020 ;;
m88???) base_machine=m88k machine=m88k/$machine ;;
m88k) base_machine=m88k machine=m88k/m88100 ;;
mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
mips*) base_machine=mips machine=mips/$machine ;;
s390) base_machine=s390 machine=s390/s390-32 ;;
s390x) base_machine=s390 machine=s390/s390-64 ;;
sh3*) base_machine=sh machine=sh/sh3 ;;
sh4*) base_machine=sh machine=sh/sh4 ;;
sparc | sparcv[67])
base_machine=sparc machine=sparc/sparc32 ;;
sparcv8 | supersparc | hypersparc)
base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
sparcv8plus | sparcv8plusa | sparcv9)
base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
sparcv8plusb | sparcv9b)
base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
sparc64 | ultrasparc)
base_machine=sparc machine=sparc/sparc64 ;;
sparc64b | ultrasparc3)
base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
*) base_machine=$machine ;;
esac
changequote([,])dnl
AC_SUBST(base_machine)
if test "$base_machine" = "i386"; then
AC_DEFINE(USE_REGPARMS)
fi
# Compute the list of sysdep directories for this configuration.
# This can take a while to compute.
sysdep_dir=$srcdir/sysdeps
AC_MSG_CHECKING(sysdep dirs)
dnl We need to use [ and ] for other purposes for a while now.
changequote(,)dnl
# Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
case "$os" in
gnu*)
base_os=mach/hurd ;;
netbsd* | 386bsd* | freebsd* | bsdi*)
base_os=unix/bsd/bsd4.4 ;;
osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
base_os=unix/bsd ;;
sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
base_os=unix/sysv ;;
irix6*)
base_os=unix/sysv/irix6/$os ;;
solaris[2-9]*)
base_os=unix/sysv/sysv4 ;;
hpux*)
base_os=unix/sysv/hpux/$os ;;
aix4.3*)
base_os=unix/sysv/aix/aix4.3 ;;
none)
base_os=standalone ;;
*)
base_os='' ;;
esac
# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
tail=$os
ostry=$os
while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
ostry="$ostry /$o"
tail=$o
done
o=`echo $tail | sed 's/[0-9]*$//'`
if test $o != $tail; then
ostry="$ostry /$o"
fi
# For linux-gnu, try linux-gnu, then linux.
o=`echo $tail | sed 's/-.*$//'`
if test $o != $tail; then
ostry="$ostry /$o"
fi
# For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
base=
tail=$base_os
while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
set $b
base="$base /$1"
tail="$2"
done
# For sparc/sparc32, try sparc/sparc32 and then sparc.
mach=
tail=$machine
while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
set $m
# Prepend the machine's FPU directory unless --without-fp.
if test "$with_fp" = yes; then
mach="$mach /$1/fpu"
fi
mach="$mach /$1"
tail="$2"
done
dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
changequote([,])dnl
# Find what sysdep directories exist.
sysnames=
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
for d in $add_ons_pfx ''; do
for b in $base ''; do
for m0 in $mach ''; do
for v in /$vendor ''; do
test "$v" = / && continue
for o in /$ostry ''; do
test "$o" = / && continue
for m in $mach ''; do
if test "$m0$b$v$o$m"; then
try="${d}sysdeps$m0$b$v$o$m"
test -n "$enable_debug_configure" &&
echo "$0 [DEBUG]: try $try" >&2
if test -d $srcdir/$try; then
sysnames="$sysnames $try"
{ test -n "$o" || test -n "$b"; } && os_used=t
{ test -n "$m" || test -n "$m0"; } && machine_used=t
fi
fi
done
done
done
done
done
done
IFS="$ac_save_ifs"
if test -z "$os_used" && test "$os" != none; then
AC_MSG_ERROR(Operating system $os is not supported.)
fi
if test -z "$machine_used" && test "$machine" != none; then
AC_MSG_ERROR(The $machine is not supported.)
fi
# We have now validated the configuration.
# If using ELF, look for an `elf' subdirectory of each machine directory.
# We prepend these rather than inserting them whereever the machine appears
# because things specified by the machine's ELF ABI should override
# OS-specific things, and should always be the same for any OS on the
# machine (otherwise what's the point of an ABI?).
if test "$elf" = yes; then
elf_dirs=
for d in $add_ons_pfx ''; do
for m in $mach; do
if test -d $srcdir/${d}sysdeps$m/elf; then
elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
fi
done
done
sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
fi
# Expand the list of system names into a full list of directories
# from each element's parent name and Implies file (if present).
set $sysnames
names=
while test $# -gt 0; do
name=$1
shift
case " $names " in *" $name "*)
# Already in the list.
continue
esac
# Report each name as we discover it, so there is no long pause in output.
echo $ac_n "$name $ac_c" >&AC_FD_MSG
name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
case $name in
/*) xsrcdir= ;;
*) xsrcdir=$srcdir/ ;;
esac
test -n "$enable_debug_configure" &&
echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
if test -f $xsrcdir$name/Implies; then
# Collect more names from the `Implies' file (removing comments).
implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
implied=
for x in $implied_candidate; do
found=no
if test -d $xsrcdir$name_base/$x; then
implied="$implied $name_base/$x";
found=yes
fi
for d in $add_ons_pfx ''; do
try="${d}sysdeps/$x"
case $d in
/*) try_srcdir= ;;
*) try_srcdir=$srcdir/ ;;
esac
test -n "$enable_debug_configure" &&
echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
then
implied="$implied $try"
found=yes
fi
done
if test $found = no; then
AC_MSG_WARN($name/Implies specifies nonexistent $x)
fi
done
else
implied=
fi
# Add NAME to the list of names.
names="$names $name"
# Find the parent of NAME, using the empty string if it has none.
changequote(,)dnl
parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
changequote([,])dnl
# Add the names implied by NAME, and NAME's parent (if it has one), to
# the list of names to be processed (the argument list). We prepend the
# implied names to the list and append the parent. We want implied
# directories to come before further directories inferred from the
# configuration components; this ensures that for sysv4, unix/common
# (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
# after sysv4).
sysnames="`echo $implied $* $parent`"
test -n "$sysnames" && set $sysnames
done
# Add the default directories.
default_sysnames=sysdeps/generic
if test "$elf" = yes; then
default_sysnames="sysdeps/generic/elf $default_sysnames"
fi
sysnames="$names $default_sysnames"
AC_SUBST(sysnames)
# The other names were emitted during the scan.
AC_MSG_RESULT($default_sysnames)
### Locate tools.
AC_PROG_INSTALL
if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
# The makefiles need to use a different form to find it in $srcdir.
INSTALL='\$(..)./scripts/install-sh -c'
fi
AC_PROG_LN_S
# We need the physical current working directory. We cannot use the
# "pwd -P" shell builtin since that's not portable. Instead we try to
# find a pwd binary. Note that assigning to the PWD environment
# variable might have some interesting side effects, so we don't do
# that.
AC_PATH_PROG(PWD_P, pwd, no)
if test "$PWD_P" = no; then
AC_MSG_ERROR(*** A pwd binary could not be found.)
fi
# These programs are version sensitive.
AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
[version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]*],
critic_missing="$critic_missing gcc")
AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
[GNU Make[^0-9]*\([0-9][0-9.]*\)],
[3.79* | 3.[89]*], critic_missing="$critic_missing make")
if test -n "$critic_missing"; then
AC_MSG_ERROR([
*** These critical programs are missing or too old:$critic_missing
*** Check the INSTALL file for required versions.])
fi
AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
[GNU gettext.* \([0-9]*\.[0-9.]*\)],
[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="$aux_missing msgfmt")
AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
[GNU texinfo.* \([0-9][0-9.]*\)],
[4.*],
MAKEINFO=: aux_missing="$aux_missing makeinfo")
AC_CHECK_PROG_VER(SED, sed, --version,
[GNU sed version \([0-9]*\.[0-9.]*\)],
[3.0[2-9]*|3.[1-9]*|[4-9]*],
SED=: aux_missing="$aux_missing sed")
AC_PROG_CC_LOCAL
AC_CANONICAL_BUILD
if test $host != $build; then
AC_CHECK_PROGS(BUILD_CC, gcc cc)
fi
AC_SUBST(cross_compiling)
AC_PROG_CPP
LIBC_PROG_BINUTILS
AC_CHECK_TOOL(MIG, mig, MISSING)
# Accept binutils 2.10.1 or newer (and also any ia64 2.9 version)
# XXX Commented out because it filters out too many good versions.
# XXX --drepper
# AC_CHECK_PROG_VER(AS, $AS, --version,
# [GNU assembler.* \([0-9]*\.[0-9.]*\(-ia64-[0-9]*\)*\)],
# [2.10.[1-9]* | 2.1[1-9]* | 2.9-ia64-*], AS=: critic_missing=t)
test -n "$aux_missing" && AC_MSG_WARN([
*** These auxiliary programs are missing or too old:$aux_missing
*** some features will be disabled.
*** Check the INSTALL file for required versions.])
# glibcbug.in wants to know the compiler version.
CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
AC_SUBST(CCVERSION)
# if using special system headers, find out the compiler's sekrit
# header directory and add that to the list. NOTE: Only does the right
# thing on a system that doesn't need fixincludes. (Not presently a problem.)
if test -n "$sysheaders"; then
ccheaders=`$CC -print-file-name=include`
SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
fi
AC_SUBST(SYSINCLUDES)
# check if ranlib is necessary
AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
cat > conftest.c <<EOF
int a;
char b;
void c(void) {}
EOF
$CC $CFLAGS -c conftest.c
$AR cr conftest.a conftest.c
cp conftest.a conftest2.a
$RANLIB conftest.a
if cmp -s conftest.a conftest2.a; then
libc_cv_ranlib_necessary=no
else
libc_cv_ranlib_necessary=yes
fi
rm -rf conftest*])
if test "$libc_cv_ranlib_necessary" = no; then
RANLIB=:
fi
# Test if LD_LIBRARY_PATH contains the notation for the current directory
# since this would lead to problems installing/building glibc.
# LD_LIBRARY_PATH contains the current directory if one of the following
# is true:
# - one of the terminals (":" and ";") is the first or last sign
# - two terminals occur directly after each other
# - the path contains an element with a dot in it
AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
changequote(,)dnl
case ${LD_LIBRARY_PATH} in
[:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
ld_library_path_setting="contains current directory"
;;
*)
ld_library_path_setting="ok"
;;
esac
changequote([,])dnl
AC_MSG_RESULT($ld_library_path_setting)
if test "$ld_library_path_setting" != "ok"; then
AC_MSG_ERROR([
*** LD_LIBRARY_PATH shouldn't contain the current directory when
*** building glibc. Please change the environment variable
*** and run configure again.])
fi
AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
libc_cv_gcc_static_libgcc=
else
libc_cv_gcc_static_libgcc=-static-libgcc
fi])
AC_SUBST(libc_cv_gcc_static_libgcc)
AC_PATH_PROG(BASH, bash, no)
if test "$BASH" != no &&
$BASH -c 'test "$BASH_VERSINFO" \
&& test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
libc_cv_have_bash2=yes
else
libc_cv_have_bash2=no
fi
AC_SUBST(libc_cv_have_bash2)
dnl We need a ksh compatible shell for tzselect.
if test "$BASH" = no; then
AC_PATH_PROG(KSH, ksh, no)
if test "$KSH" = no; then
libc_cv_have_ksh=no
else
libc_cv_have_ksh=yes
fi
else
KSH="$BASH"
AC_SUBST(KSH)
libc_cv_have_ksh=yes
fi
AC_SUBST(libc_cv_have_ksh)
AC_PROG_AWK
AC_PATH_PROG(PERL, perl, no)
if test "$PERL" != no &&
(eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
PERL=no
fi
AC_PATH_PROG(INSTALL_INFO, install-info, no,
$PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
if test "$INSTALL_INFO" != "no"; then
AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
[mkdir conftest.d
# There is a hard ^_ on the next line. I am open to better ideas.
(echo ''
echo 'File: dir Node: Top This is the top of the INFO tree'
echo '* Menu:') >conftest.d/dir
(echo 'INFO-DIR-SECTION i-d-s works'
echo 'START-INFO-DIR-ENTRY'
echo '* Prog: (prog). Program.'
echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
then
if grep -s 'i-d-s works' conftest.d/dir >/dev/null
then libc_cv_old_debian_install_info=no
else libc_cv_old_debian_install_info=yes
fi
else libc_cv_old_debian_install_info=no testfailed=t
fi
rm -fr conftest.d])
if test -n "$testfailed"
then AC_MSG_WARN([install-info errored out, check config.log])
fi
OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
fi
AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
echo '#include <stddef.h>
FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
if eval "$ac_cpp conftest.c 2>/dev/null" \
| grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
libc_cv_signed_size_t=no
else
libc_cv_signed_size_t=yes
fi
rm -f conftest*])
if test $libc_cv_signed_size_t = yes; then
dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
cat >> confdefs.h <<\EOF
#undef __SIZE_TYPE__
#define __SIZE_TYPE__ unsigned
EOF
fi
AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
AC_TRY_COMPILE(dnl
[#define __need_size_t
#define __need_wchar_t
#include <stddef.h>
#define __need_NULL
#include <stddef.h>], [size_t size; wchar_t wchar;
#ifdef offsetof
#error stddef.h ignored __need_*
#endif
if (&size == NULL || &wchar == NULL) abort ();],
libc_cv_friendly_stddef=yes,
libc_cv_friendly_stddef=no)])
if test $libc_cv_friendly_stddef = yes; then
config_vars="$config_vars
override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
fi
AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
libc_cv_need_minus_P, [dnl
cat > conftest.S <<EOF
#include "confdefs.h"
/* Nothing whatsoever. */
EOF
if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
libc_cv_need_minus_P=no
else
libc_cv_need_minus_P=yes
fi
rm -f conftest*])
if test $libc_cv_need_minus_P = yes; then
config_vars="$config_vars
asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
fi
AC_MSG_CHECKING(whether .text pseudo-op must be used)
AC_CACHE_VAL(libc_cv_dot_text, [dnl
cat > conftest.s <<EOF
.text
EOF
libc_cv_dot_text=
if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
libc_cv_dot_text=.text
fi
rm -f conftest*])
if test -z "$libc_cv_dot_text"; then
AC_MSG_RESULT(no)
else
AC_MSG_RESULT(yes)
fi
AC_CACHE_CHECK(for assembler global-symbol directive,
libc_cv_asm_global_directive, [dnl
libc_cv_asm_global_directive=UNKNOWN
for ac_globl in .globl .global .EXPORT; do
cat > conftest.s <<EOF
${libc_cv_dot_text}
${ac_globl} foo
foo:
EOF
if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
libc_cv_asm_global_directive=${ac_globl}
fi
rm -f conftest*
test $libc_cv_asm_global_directive != UNKNOWN && break
done])
if test $libc_cv_asm_global_directive = UNKNOWN; then
AC_MSG_ERROR(cannot determine asm global directive)
else
AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
fi
AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
cat > conftest.s <<EOF
${libc_cv_dot_text}
foo:
.set glibc_conftest_frobozz,foo
$libc_cv_asm_global_directive glibc_conftest_frobozz
EOF
# The alpha-dec-osf1 assembler gives only a warning for `.set'
# (but it doesn't work), so we must do a linking check to be sure.
cat > conftest1.c <<\EOF
extern int glibc_conftest_frobozz;
main () { printf ("%d\n", glibc_conftest_frobozz); }
EOF
if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
-o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
libc_cv_asm_set_directive=yes
else
libc_cv_asm_set_directive=no
fi
rm -f conftest*])
if test $libc_cv_asm_set_directive = yes; then
AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
fi
# The Aix ld uses global .symbol_names instead of symbol_names.
case "$os" in
aix4.3*)
AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
esac
AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
[cat > conftest.s <<EOF
${libc_cv_dot_text}
_sym:
.symver _sym,sym@VERS
EOF
if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
libc_cv_asm_symver_directive=yes
else
libc_cv_asm_symver_directive=no
fi
rm -f conftest*])
AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
if test $libc_cv_asm_symver_directive = yes; then
cat > conftest.s <<EOF
${libc_cv_dot_text}
_sym:
.symver _sym,sym@VERS
EOF
cat > conftest.map <<EOF
VERS_1 {
global: sym;
};
VERS_2 {
global: sym;
} VERS_1;
EOF
if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
-nostartfiles -nostdlib
-Wl,--version-script,conftest.map
1>&AC_FD_CC]);
then
libc_cv_ld_version_script_option=yes
else
libc_cv_ld_version_script_option=no
fi
else
libc_cv_ld_version_script_option=no
fi
else
libc_cv_ld_version_script_option=no
fi
rm -f conftest*])
if test $shared != no &&
test $libc_cv_asm_symver_directive = yes &&
test $libc_cv_ld_version_script_option = yes &&
test $enable_versioning = yes; then
VERSIONING=yes
AC_DEFINE(DO_VERSIONING)
else
VERSIONING=no
fi
AC_SUBST(VERSIONING)
if test $elf = yes && test $shared != no && test $VERSIONING = no; then
echo "\
*** WARNING: You should not compile GNU libc without versioning. Not using
*** versioning will introduce incompatibilities so that old binaries
*** will not run anymore.
*** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
fi
if test $elf = yes; then
AC_CACHE_CHECK(for .previous assembler directive,
libc_cv_asm_previous_directive, [dnl
cat > conftest.s <<EOF
.section foo_section
.previous
EOF
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
libc_cv_asm_previous_directive=yes
else
libc_cv_asm_previous_directive=no
fi
rm -f conftest*])
if test $libc_cv_asm_previous_directive = yes; then
AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
else
AC_CACHE_CHECK(for .popsection assembler directive,
libc_cv_asm_popsection_directive, [dnl
cat > conftest.s <<EOF
.pushsection foo_section
.popsection
EOF
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
libc_cv_asm_popsection_directive=yes
else
libc_cv_asm_popsection_directive=no
fi
rm -f conftest*])
if test $libc_cv_asm_popsection_directive = yes; then
AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
fi
fi
AC_CACHE_CHECK(for .protected and .hidden assembler directive,
libc_cv_asm_protected_directive, [dnl
cat > conftest.s <<EOF
.protected foo
foo:
.hidden bar
bar:
EOF
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
libc_cv_asm_protected_directive=yes
else
libc_cv_asm_protected_directive=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_asm_protected_directive)
AC_DEFINE(HAVE_PROTECTED)
AC_DEFINE(HAVE_HIDDEN)
if test $libc_cv_asm_protected_directive = yes; then
AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
libc_cv_visibility_attribute,
[cat > conftest.c <<EOF
int foo __attribute__ ((visibility ("hidden"))) = 1;
int bar __attribute__ ((visibility ("protected"))) = 1;
EOF
libc_cv_visibility_attribute=no
if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
if grep '\.hidden.*foo' conftest.s >/dev/null; then
if grep '\.protected.*bar' conftest.s >/dev/null; then
libc_cv_visibility_attribute=yes
fi
fi
fi
rm -f conftest.[cs]
])
if test $libc_cv_visibility_attribute = yes; then
AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
fi
fi
if test $libc_cv_visibility_attribute = yes; then
AC_CACHE_CHECK(for broken __attribute__((visibility())),
libc_cv_broken_visibility_attribute,
[cat > conftest.c <<EOF
int foo (int x);
int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
int bar (int x) { return x; }
EOF
libc_cv_broken_visibility_attribute=yes
if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
changequote(,)dnl
if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
changequote([,])dnl
libc_cv_broken_visibility_attribute=no
fi
fi
rm -f conftest.c conftest.s
])
if test $libc_cv_broken_visibility_attribute = yes; then
AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
fi
fi
AC_CACHE_CHECK(for broken __attribute__((alias())),
libc_cv_broken_alias_attribute,
[cat > conftest.c <<EOF
extern int foo (int x) __asm ("xyzzy");
int bar (int x) { return x; }
extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
extern int dfoo;
extern __typeof (dfoo) dfoo __asm ("abccb");
int dfoo = 1;
EOF
libc_cv_broken_alias_attribute=yes
if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
if grep 'xyzzy' conftest.s >/dev/null &&
grep 'abccb' conftest.s >/dev/null; then
libc_cv_broken_alias_attribute=no
fi
fi
rm -f conftest.c conftest.s
])
if test $libc_cv_broken_alias_attribute = yes; then
AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
fi
if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
libc_cv_have_sdata_section,
[echo "int i;" > conftest.c
libc_cv_have_sdata_section=no
if ${CC-cc} -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
| grep '\.sdata' >/dev/null; then
libc_cv_have_sdata_section=yes
fi
rm -f conftest.c conftest.so
])
if test $libc_cv_have_sdata_section = yes; then
AC_DEFINE(HAVE_SDATA_SECTION)
fi
fi
AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
libc_cv_initfinit_array, [dnl
cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
int foo (void) { return 1; }
int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
EOF
if AC_TRY_COMMAND([${CC-cc} -o conftest conftest.c
-static -nostartfiles -nostdlib 1>&AC_FD_CC])
then
if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
libc_cv_initfinit_array=yes
else
libc_cv_initfinit_array=no
fi
else
libc_cv_initfinit_array=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_initfinit_array)
if test $libc_cv_initfinit_array = yes; then
AC_DEFINE(HAVE_INITFINI_ARRAY)
fi
AC_CACHE_CHECK(for -z nodelete option,
libc_cv_z_nodelete, [dnl
cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
-nostartfiles -nostdlib
-Wl,--enable-new-dtags,-z,nodelete 1>&AC_FD_CC])
then
libc_cv_z_nodelete=yes
else
libc_cv_z_nodelete=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_z_nodelete)
AC_CACHE_CHECK(for -z nodlopen option,
libc_cv_z_nodlopen, [dnl
cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
-nostartfiles -nostdlib
-Wl,--enable-new-dtags,-z,nodlopen 1>&AC_FD_CC])
then
libc_cv_z_nodlopen=yes
else
libc_cv_z_nodlopen=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_z_nodlopen)
AC_CACHE_CHECK(for -z initfirst option,
libc_cv_z_initfirst, [dnl
cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
-nostartfiles -nostdlib
-Wl,--enable-new-dtags,-z,initfirst 1>&AC_FD_CC])
then
libc_cv_z_initfirst=yes
else
libc_cv_z_initfirst=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_z_initfirst)
AC_CACHE_CHECK(for -Bgroup option,
libc_cv_Bgroup, [dnl
cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c -Wl,-Bgroup -nostdlib 1>&AC_FD_CC])
then
libc_cv_Bgroup=yes
else
libc_cv_Bgroup=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_Bgroup)
AC_CACHE_CHECK(for -z combreloc,
libc_cv_z_combreloc, [dnl
cat > conftest.c <<EOF
extern int bar (int);
extern int mumble;
int foo (void) { return bar (mumble); }
EOF
if AC_TRY_COMMAND([${CC-cc} -shared -o conftest.so conftest.c
-nostdlib -nostartfiles
-Wl,-z,combreloc 1>&AC_FD_CC])
then
dnl The following test is a bit weak. We must use a tool which can test
dnl cross-platform since the gcc used can be a cross compiler. Without
dnl introducing new options this is not easily doable. Instead use a tool
dnl which always is cross-platform: readelf. To detect whether -z combreloc
dnl look for a section named .rel.dyn.
if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
libc_cv_z_combreloc=yes
else
libc_cv_z_combreloc=no
fi
else
libc_cv_z_combreloc=no
fi
rm -f conftest*])
if test "$libc_cv_z_combreloc" = yes; then
AC_DEFINE(HAVE_Z_COMBRELOC)
fi
fi
AC_SUBST(libc_cv_z_combreloc)
if test $elf != yes; then
AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
[AC_TRY_COMPILE(, [asm (".section .init");
asm (".section .fini");
asm ("${libc_cv_dot_text}");],
libc_cv_have_initfini=yes,
libc_cv_have_initfini=no)])
AC_SUBST(libc_cv_have_initfini)dnl
if test $libc_cv_have_initfini = yes; then
AC_DEFINE(HAVE_INITFINI)
fi
fi
if test $elf = yes -a $gnu_ld = yes; then
AC_CACHE_CHECK(whether cc puts quotes around section names,
libc_cv_have_section_quotes,
[cat > conftest.c <<EOF
static const int foo
__attribute__ ((section ("bar"))) = 1;
EOF
if ${CC-cc} -S conftest.c -o conftest.s; then
if grep '\.section.*"bar"' conftest.s >/dev/null; then
libc_cv_have_section_quotes=yes
else
libc_cv_have_section_quotes=no
fi
else
libc_cv_have_section_quotes=unknown
fi
rm -f conftest.[cs]
])
if test $libc_cv_have_section_quotes = yes; then
AC_DEFINE(HAVE_SECTION_QUOTES)
fi
fi
dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
[cat > conftest.$ac_ext <<EOF
dnl This sometimes fails to find confdefs.h, for some reason.
dnl [#]line __oline__ "[$]0"
[#]line __oline__ "configure"
#include "confdefs.h"
void underscore_test(void) {
return; }
EOF
if AC_TRY_EVAL(ac_compile); then
if grep _underscore_test conftest* >/dev/null; then
ifelse([$1], , :, [rm -f conftest*
$1])
else
ifelse([$2], , , [rm -f conftest*
$2])
fi
else
echo "configure: failed program was:" >&AC_FD_CC
cat conftest.$ac_ext >&AC_FD_CC
ifelse([$2], , , [rm -f conftest*
$2])
fi
rm -f conftest*])
if test $elf = yes; then
libc_cv_asm_underscores=no
else
if test $ac_cv_prog_cc_works = yes; then
AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
[AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
libc_cv_asm_underscores=yes,
libc_cv_asm_underscores=no)])
else
AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
[AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
libc_cv_asm_underscores=no)])
fi
fi
if test $libc_cv_asm_underscores = no; then
AC_DEFINE(NO_UNDERSCORES)
fi
if test $elf = yes; then
libc_cv_weak_symbols=yes
fi
AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
[dnl
cat > conftest.s <<EOF
${libc_cv_dot_text}
${libc_cv_asm_global_directive} foo
foo:
.weak foo
.weak bar; bar = foo
EOF
if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
libc_cv_asm_weak_directive=yes
else
libc_cv_asm_weak_directive=no
fi
rm -f conftest*])
if test $libc_cv_asm_weak_directive = no; then
AC_CACHE_CHECK(for assembler .weakext directive,
libc_cv_asm_weakext_directive,
[dnl
cat > conftest.s <<EOF
${libc_cv_dot_text}
${libc_cv_asm_global_directive} foo
foo:
.weakext bar foo
.weakext baz
${libc_cv_asm_global_directive} baz
baz:
EOF
if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
libc_cv_asm_weakext_directive=yes
else
libc_cv_asm_weakext_directive=no
fi
rm -f conftest*])
fi # no .weak
if test $libc_cv_asm_weak_directive = yes; then
AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
elif test $libc_cv_asm_weakext_directive = yes; then
AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
fi
dnl The standard hppa assembler uses `;' to start comments and `!'
dnl as a line separator. CRIS uses `;' to start comments and `@' for
dnl line separator.
case "${host_cpu}-${host_os}" in
cris*)
libc_cv_asm_line_sep='@'
AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
;;
hppa*linux*)
AC_CACHE_CHECK(for assembler line separator,
libc_cv_asm_line_sep, [dnl
cat > conftest.s <<EOF
nop ; is_old_puffin
EOF
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
libc_cv_asm_line_sep='!'
else
if test -z "$enable_hacker_mode"; then
echo "*** You need a newer assembler to compile glibc"
rm -f conftest*
exit 1
fi
libc_cv_asm_line_sep=';'
fi
rm -f conftest*])
AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
;;
esac
AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
cat > conftest.c <<\EOF
_start () {}
int __eh_pc;
__throw () {}
EOF
dnl No \ in command here because it ends up inside ''.
if AC_TRY_COMMAND([${CC-cc} $CFLAGS
-nostdlib -nostartfiles -Wl,--no-whole-archive
-o conftest conftest.c 1>&AC_FD_CC]); then
libc_cv_ld_no_whole_archive=yes
else
libc_cv_ld_no_whole_archive=no
fi
rm -f conftest*])
if test $libc_cv_ld_no_whole_archive = yes; then
no_whole_archive=-Wl,--no-whole-archive
fi
AC_SUBST(no_whole_archive)dnl
AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
cat > conftest.c <<\EOF
_start () {}
int __eh_pc;
__throw () {}
EOF
dnl No \ in command here because it ends up inside ''.
if AC_TRY_COMMAND([${CC-cc} $CFLAGS
-nostdlib -nostartfiles -fexceptions
-o conftest conftest.c 1>&AC_FD_CC]); then
libc_cv_gcc_exceptions=yes
else
libc_cv_gcc_exceptions=no
fi
rm -f conftest*])
if test $libc_cv_gcc_exceptions = yes; then
exceptions=-fexceptions
fi
AC_SUBST(exceptions)dnl
if test "$base_machine" = alpha ; then
AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
cat > conftest.c <<\EOF
foo () { }
EOF
dnl
if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
then
libc_cv_gcc_alpha_ng_prefix=yes
else
libc_cv_gcc_alpha_ng_prefix=no
fi
rm -f conftest* ])
if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
else
AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
fi
fi
if test "$host_cpu" = powerpc ; then
# Check for a bug present in at least versions 2.8.x of GCC
# and versions 1.0.x of EGCS.
AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
libc_cv_c_asmcr0_bug='no',
libc_cv_c_asmcr0_bug='yes')])
if test "$libc_cv_c_asmcr0_bug" != 'no'; then
AC_DEFINE(BROKEN_PPC_ASM_CR0)
fi
fi
AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
[cat > conftest.c <<EOF
#line __oline__ "configure"
static char *__EH_FRAME_BEGIN__;
_start ()
{
#ifdef CHECK__register_frame
__register_frame (__EH_FRAME_BEGIN__);
__deregister_frame (__EH_FRAME_BEGIN__);
#endif
#ifdef CHECK__register_frame_info
__register_frame_info (__EH_FRAME_BEGIN__);
__deregister_frame_info (__EH_FRAME_BEGIN__);
#endif
}
int __eh_pc;
__throw () {}
/* FIXME: this is fragile. */
malloc () {}
strcmp () {}
strlen () {}
memcpy () {}
memset () {}
free () {}
abort () {}
__bzero () {}
EOF
dnl No \ in command here because it ends up inside ''.
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
-nostdlib -nostartfiles
-o conftest conftest.c -lgcc >&AC_FD_CC]); then
libc_cv_gcc_dwarf2_unwind_info=static
else
libc_cv_gcc_dwarf2_unwind_info=no
fi
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
-nostdlib -nostartfiles
-o conftest conftest.c -lgcc -lgcc_eh >&AC_FD_CC]); then
if ${CC-cc} $CFLAGS -DCHECK__register_frame_info -nostdlib -nostartfiles \
-o conftest conftest.c -lgcc -lgcc_eh -v 2>&1 >/dev/null \
| grep -q -- --eh-frame-hdr; then
libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
else
libc_cv_gcc_dwarf2_unwind_info=static
fi
else
libc_cv_gcc_dwarf2_unwind_info=no
fi
if test $libc_cv_gcc_dwarf2_unwind_info = no; then
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
-nostdlib -nostartfiles
-o conftest conftest.c -lgcc >&AC_FD_CC]); then
libc_cv_gcc_dwarf2_unwind_info=yes
else
libc_cv_gcc_dwarf2_unwind_info=no
fi
fi
rm -f conftest*])
case $libc_cv_gcc_dwarf2_unwind_info in
yes)
AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
;;
static)
AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
;;
esac
dnl Check whether compiler understands __builtin_expect.
AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
[cat > conftest.c <<EOF
#line __oline__ "configure"
int foo (int a)
{
a = __builtin_expect (a, 10);
return a == 10 ? 0 : 1;
}
EOF
dnl No \ in command here because it ends up inside ''.
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
-o conftest conftest.c -lgcc >&AC_FD_CC]); then
libc_cv_gcc_builtin_expect=yes
else
libc_cv_gcc_builtin_expect=no
fi
rm -f conftest*])
if test "$libc_cv_gcc_builtin_expect" = yes; then
AC_DEFINE(HAVE_BUILTIN_EXPECT)
fi
AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
cat > conftest.c <<\EOF
void zero (void *x)
{
__builtin_memset (x, 0, 1000);
}
EOF
dnl
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
then
libc_cv_gcc_builtin_memset=no
else
libc_cv_gcc_builtin_memset=yes
fi
rm -f conftest* ])
if test "$libc_cv_gcc_builtin_memset" = yes ; then
AC_DEFINE(HAVE_BUILTIN_MEMSET)
fi
dnl Check whether the compiler supports subtraction of local labels.
AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
[cat > conftest.c <<EOF
changequote(,)dnl
#line __oline__ "configure"
int foo (int a)
{
static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
void *p = &&l1 + ar[a];
goto *p;
l1:
return 1;
l2:
return 2;
}
changequote([,])dnl
EOF
dnl No \ in command here because it ends up inside ''.
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
-o conftest conftest.c -lgcc >&AC_FD_CC]); then
libc_cv_gcc_subtract_local_labels=yes
else
libc_cv_gcc_subtract_local_labels=no
fi
rm -f conftest*])
if test "$libc_cv_gcc_subtract_local_labels" = yes; then
AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
fi
dnl Check whether the compiler supports the __thread keyword.
AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
[cat > conftest.c <<EOF
__thread int a = 42;
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AC_FD_CC]); then
libc_cv_gcc___thread=yes
else
libc_cv_gcc___thread=no
fi
rm -f conftest*])
if test "$libc_cv_gcc___thread" = yes; then
AC_DEFINE(HAVE___THREAD)
fi
dnl Check whether we have the gd library available.
AC_MSG_CHECKING(for libgd)
if test "$with_gd" != "no"; then
old_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $libgd_include"
old_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS $libgd_ldflags"
old_LIBS="$LIBS"
LIBS="$LIBS -lgd -lpng -lz -lm"
AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
CFLAGS="$old_CFLAGS"
LDFLAGS="$old_LDFLAGS"
LIBS="$old_LIBS"
else
LIBGD=no
fi
AC_MSG_RESULT($LIBGD)
AC_SUBST(LIBGD)
dnl check for the size of 'long double'.
AC_CHECK_SIZEOF(long double, 0)
sizeof_long_double=$ac_cv_sizeof_long_double
AC_SUBST(sizeof_long_double)
### End of automated tests.
### Now run sysdeps configure fragments.
# sysdeps configure fragments may set these with files to be linked below.
libc_link_dests=
libc_link_sources=
# They also can set these variables.
use_ldconfig=no
ldd_rewrite_script=no
libc_cv_sysconfdir=$sysconfdir
libc_cv_gcc_unwind_find_fde=no
# Iterate over all the sysdep directories we will use, running their
# configure fragments, and looking for a uname implementation.
uname=
for dir in $sysnames; do
case $dir in
/*) dest=$dir ;;
*) dest=$srcdir/$dir ;;
esac
if test -r $dest/configure; then
AC_MSG_RESULT(running configure fragment for $dest)
. $dest/configure
fi
[
if test -z "$uname"; then
if test -r $dest/uname.c ||
test -r $dest/uname.S ||
{ test -r $dest/syscalls.list &&
grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
uname=$dir
fi
fi
]dnl
done
if test x$libc_cv_gcc_unwind_find_fde = xyes; then
AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
fi
AC_SUBST(libc_cv_gcc_unwind_find_fde)
AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
# If we will use the generic uname implementation, we must figure out what
# it will say by examining the system, and write the results in config-name.h.
if test "$uname" = "sysdeps/generic"; then
changequote(,)dnl
uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
changequote([,])dnl
if test $uname_sysname != $config_os; then
config_release=`echo $config_os | sed s/$uname_sysname//`
fi
dnl
AC_DEFUN(LIBC_KERNEL_ID, [dnl
if test -r /vmunix; then
kernel_id=`strings /vmunix | grep UNIX`
elif test -r /dynix; then
kernel_id=`strings /dynix | grep DYNIX`
else
kernel_id=
fi
])dnl
AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
AC_REQUIRE([LIBC_KERNEL_ID])dnl
changequote(,)dnl
kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
changequote([,])dnl
if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
!= x$config_release; then
# The configuration release is a substring of the kernel release.
libc_cv_uname_release=$kernel_release
elif test x$config_release != x; then
libc_cv_uname_release=$config_release
elif test x$kernel_release != x; then
libc_cv_uname_release=$kernel_release
else
libc_cv_uname_release=unknown
fi])
uname_release="$libc_cv_uname_release"
AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
AC_REQUIRE([LIBC_KERNEL_ID])dnl
changequote(,)dnl
kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
changequote([,])dnl
if test -n "$kernel_version"; then
libc_cv_uname_version="$kernel_version"
else
libc_cv_uname_version=unknown
fi])
uname_version="$libc_cv_uname_version"
AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
config_uname=config-name.h:config-name.in
else
# For non-generic uname, we don't need to create config-name.h at all.
config_uname=
fi
dnl This is tested by existing code and it's simpler to avoid changing it.
AC_DEFINE(USE_IN_LIBIO)
# Test for old glibc 2.0.x headers so that they can be removed properly
# Search only in includedir.
AC_MSG_CHECKING(for old glibc 2.0.x headers)
if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
then
old_glibc_headers=yes
else
old_glibc_headers=no
fi
AC_MSG_RESULT($old_glibc_headers)
if test ${old_glibc_headers} = yes; then
AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
AC_MSG_WARN(*** be removed.)
fi
AC_SUBST(old_glibc_headers)
AC_SUBST(libc_cv_slibdir)
AC_SUBST(libc_cv_localedir)
AC_SUBST(libc_cv_sysconfdir)
AC_SUBST(libc_cv_rootsbindir)
AC_SUBST(use_ldconfig)
AC_SUBST(ldd_rewrite_script)
AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
if test $gnu_ld = yes; then
AC_DEFINE(HAVE_GNU_LD)
fi
if test $gnu_as = yes; then
AC_DEFINE(HAVE_GNU_AS)
fi
if test $elf = yes; then
AC_DEFINE(HAVE_ELF)
fi
if test $xcoff = yes; then
AC_DEFINE(HAVE_XCOFF)
fi
AC_SUBST(static)
AC_SUBST(shared)
if test $shared = default; then
if test $gnu_ld = yes; then
shared=$elf
else
# For now we do not assume shared libs are available. In future more
# tests might become available.
shared=no
fi
fi
AC_CACHE_CHECK([whether -fPIC is default], pic_default,
[pic_default=yes
cat > conftest.c <<EOF
#if defined __PIC__ || defined __pic__ || defined PIC || defined pic
# error PIC is default.
#endif
EOF
if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
pic_default=no
fi
rm -f conftest.*])
AC_SUBST(pic_default)
AC_SUBST(profile)
AC_SUBST(omitfp)
AC_SUBST(bounded)
AC_SUBST(static_nss)
AC_SUBST(nopic_initfini)
AC_SUBST(DEFINES)
case "$add_ons" in
*door*) linux_doors=yes ;;
*) linux_doors=no ;;
esac
AC_SUBST(linux_doors)
dnl See sysdeps/mach/configure.in for this variable.
AC_SUBST(mach_interface_list)
if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
config_makefile=
else
config_makefile=Makefile
fi
VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
AC_SUBST(VERSION)
AC_SUBST(RELEASE)
AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
case $CONFIG_FILES in *config.make*)
echo "$config_vars" >> config.make;;
esac
test -d bits || mkdir bits], [config_vars='$config_vars'])