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|
# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
# -------------------------------------------------------
# Tests whether HEADER exists and can be compiled using the include files in
# INCLUDES, setting the cache variable VAR accordingly.
ac_fn_c_check_header_compile ()
{
as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
$as_echo_n "checking for $2... " >&6; }
if eval \${$3+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
$4
#include <$2>
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
eval "$3=yes"
else
eval "$3=no"
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
eval ac_res=\$$3
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
$as_echo "$ac_res" >&6; }
eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
} # ac_fn_c_check_header_compile
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
# Local configure fragment for sysdeps/unix/sysv/linux.
if test -n "$sysheaders"; then
OLD_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking installed Linux kernel header files" >&5
$as_echo_n "checking installed Linux kernel header files... " >&6; }
if ${libc_cv_linux2632+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <linux/version.h>
#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE < (2 *65536+ 6 *256+ 32) /* 2.6.32 */
# error kernel headers missing or too old
#endif
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
libc_cv_linux2632='2.6.32 or later'
else
libc_cv_linux2632='missing or too old!'
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_linux2632" >&5
$as_echo "$libc_cv_linux2632" >&6; }
if test "$libc_cv_linux2632" != '2.6.32 or later'; then
as_fn_error $? "GNU libc requires kernel header files from
Linux 2.6.32 or later to be installed before configuring.
The kernel header files are found usually in /usr/include/asm and
/usr/include/linux; make sure these directories use files from
Linux 2.6.32 or later. This check uses <linux/version.h>, so
make sure that file was built correctly when installing the kernel header
files. To use kernel headers not from /usr/include/linux, use the
configure option --with-headers." "$LINENO" 5
fi
# If the user gave a minimal version number test whether the available
# kernel headers are young enough. Additionally we have minimal
# kernel versions for some architectures. If a previous configure fragment
# set arch_minimum_kernel already, let that override our defaults here.
# Note that we presume such a fragment has set libc_cv_gcc_unwind_find_fde
# if appropriate too.
test -n "$arch_minimum_kernel" || arch_minimum_kernel=2.6.32
if test -n "$minimum_kernel"; then
user_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
arch_version=$((`echo "$arch_minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
if test $user_version -lt $arch_version; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&5
$as_echo "$as_me: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&2;}
minimum_kernel=$arch_minimum_kernel
fi
else
minimum_kernel=$arch_minimum_kernel
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for kernel header at least $minimum_kernel" >&5
$as_echo_n "checking for kernel header at least $minimum_kernel... " >&6; }
decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <linux/version.h>
#if LINUX_VERSION_CODE < $decnum
# error kernel headers too old
#endif
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
libc_minimum_kernel=ok
else
libc_minimum_kernel='too old!'
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_minimum_kernel" >&5
$as_echo "$libc_minimum_kernel" >&6; }
if test "$libc_minimum_kernel" = ok; then
cat >>confdefs.h <<_ACEOF
#define __LINUX_KERNEL_VERSION $decnum
_ACEOF
cat >>confdefs.h <<_ACEOF
#define __ABI_TAG_VERSION $abinum
_ACEOF
else
as_fn_error $? "*** The available kernel headers are older than the requested
*** compatible kernel version" "$LINENO" 5
fi
# Until we start requiring 2.6.37+ headers, we need to check for the
# availability of linux/fanotify.h for testing purposes.
ac_fn_c_check_header_compile "$LINENO" "linux/fanotify.h" "ac_cv_header_linux_fanotify_h" "/* No default includes. */
"
if test "x$ac_cv_header_linux_fanotify_h" = xyes; then :
$as_echo "#define HAVE_LINUX_FANOTIFY_H 1" >>confdefs.h
fi
# The result of the above test for the use of the FDE code is invalid if
# the user overrides the decision about the minimum ABI.
if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
libc_cv_gcc_unwind_find_fde=no
fi
if test -n "$sysheaders"; then
CPPFLAGS=$OLD_CPPFLAGS
fi
# Under Linux the NPTL add-on should be available.
case $add_ons in
# It is available. Good.
*nptl*)
nptl_missing=
;;
*)
nptl_missing=yes
;;
esac
if test "$nptl_missing"; then
if test $enable_sanity = yes; then
echo "\
*** On GNU/Linux systems it is normal to compile GNU libc with the
*** \`nptl' add-on. Without that, the library will be
*** incompatible with normal GNU/Linux systems.
*** If you really mean to not use this add-on, run configure again
*** using the extra parameter \`--disable-sanity-checks'."
exit 1
else
echo "\
*** WARNING: Are you sure you do not want to use the \`nptl'
*** add-on?"
fi
fi
if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
if test $enable_sanity = yes; then
echo "\
*** On GNU/Linux systems the GNU C Library should not be installed into
*** /usr/local since this might make your system totally unusable.
*** We strongly advise to use a different prefix. For details read the FAQ.
*** If you really mean to do this, run configure again using the extra
*** parameter \`--disable-sanity-checks'."
exit 1
else
echo "\
*** WARNING: Do you really want to install the GNU C Library into /usr/local?
*** This might make your system totally unusable, for details read the FAQ."
fi
fi
# One Linux we use ldconfig.
use_ldconfig=yes
if test $host = $build; then
# If $prefix/include/{net,scsi} are symlinks, make install will
# clobber what they're linked to (probably a kernel tree).
# test -L ought to work on all Linux boxes.
if test "x$prefix" != xNONE; then
ac_prefix=$prefix
else
ac_prefix=$ac_default_prefix
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for symlinks in ${ac_prefix}/include" >&5
$as_echo_n "checking for symlinks in ${ac_prefix}/include... " >&6; }
ac_message=
if test -L ${ac_prefix}/include/net; then
ac_message="$ac_message
${ac_prefix}/include/net is a symlink"
fi
if test -L ${ac_prefix}/include/scsi; then
ac_message="$ac_message
${ac_prefix}/include/scsi is a symlink"
fi
if test -n "$ac_message"; then
as_fn_error $? "$ac_message
\`make install' will destroy the target of the link(s).
Delete the links and re-run configure, or better still, move the entire
${ac_prefix}/include directory out of the way." "$LINENO" 5
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
$as_echo "ok" >&6; }
fi
fi
# We have inlined syscalls.
$as_echo "#define HAVE_INLINED_SYSCALLS 1" >>confdefs.h
|
