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# Local configure fragment for sysdeps/unix/sysv/linux.
# On Linux, the default is to use libio instead of stdio.
test $stdio = default && stdio=libio
# Don't bother trying to generate any glue code to be compatible with the
# existing system library, because we are the only system library.
inhibit_glue=yes
echo $ac_n "checking installed Linux kernel header files""... $ac_c" 1>&6
echo "configure:12: checking installed Linux kernel header files" >&5
if eval "test \"`echo '$''{'libc_cv_linux2010'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
cat > conftest.$ac_ext <<EOF
#line 17 "configure"
#include "confdefs.h"
#include <linux/version.h>
int main() {
#if LINUX_VERSION_CODE < (2 *65536+ 0 *256+ 10) /* 2.0.10 */
eat flaming death
#endif
; return 0; }
EOF
if { (eval echo configure:26: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
rm -rf conftest*
libc_cv_linux2010='2.0.10 or later'
else
echo "configure: failed program was:" >&5
cat conftest.$ac_ext >&5
rm -rf conftest*
libc_cv_linux2010='TOO OLD!'
fi
rm -f conftest*
fi
echo "$ac_t""$libc_cv_linux2010" 1>&6
if test "$libc_cv_linux2010" != '2.0.10 or later'; then
{ echo "configure: error: GNU libc requires kernel header files from
Linux 2.0.10 or later to be installed before configuring.
The kernel header files are found usually in /usr/include/asm and
/usr/include/linux; make sure these directories use files from
Linux 2.0.10 or later. This check uses <linux/version.h>, so
make sure that file was built correctly when installing the kernel header
files." 1>&2; exit 1; }
fi
# The Linux filesystem standard prescribes where to place "essential"
# files. I.e., when the installation prefix is "/usr" we have to place
# shared library objects and the configuration files on the root partition
# in /lib and /etc.
if test "$prefix" = "/usr"; then
libc_cv_slibdir="/lib"
libc_cv_sysconfdir="/etc"
libc_cv_rootsbindir="/sbin"
fi
# Under Linux the LinuxThreads and crypt add-on should be available.
case $add_ons in
# Both are available. Good.
*linuxthreads*crypt* | *crypt*linuxthreads*)
message=
;;
*linuxthreads*)
message="\
*** WARNING:
*** Are you sure you do not want to use the \`crypt' add-on?"
;;
*crypt*)
message="\
*** WARNING:
*** Are you sure you do not want to use the \`linuxthread' add-on?"
;;
*)
message="\
*** WARNING: Are you sure you do not want to use the \`linuxthreads'
*** and \`crypt' add-ons?"
;;
esac
if test "$message"; then
if test $enable_sanity = yes; then
echo "\
*** You should not compile the GNU libc without the \`linuxthreads' and
*** \`crypt' add-on. Not using them risks to be incompatible with the
*** libraries of other systems. Consider getting the add-ons and restart
*** the configuration.
*** If you really mean to avoid those add-ons run configure again, now
*** using the extra parameter \`--disable-sanity-checks'."
exit 1
else
echo "$message"
fi
fi
# Check whether `ldconfig' sources are available. This will go away as soon
# as ldconfig is available in GNU libc.
if test -f $srcdir/elf/ldconfig.c; then
has_ldconfig=yes
fi
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