configure: Use autoconf 2.71

[glibc.git] / sysdeps / unix / sysv / linux / configure

# 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


{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking installed Linux kernel header files" >&5
printf %s "checking installed Linux kernel header files... " >&6; }
if test ${libc_cv_linux320+y}
then :
  printf %s "(cached) " >&6
else $as_nop
  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */
#include <linux/version.h>
#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE <  (3 *65536+ 2 *256+ 0) /* 3.2.0 */
# error kernel headers missing or too old
#endif
int
main (void)
{

  ;
  return 0;
}
_ACEOF
if ac_fn_c_try_cpp "$LINENO"
then :
  libc_cv_linux320='3.2.0 or later'
else $as_nop
  libc_cv_linux320='missing or too old!'
fi
rm -f conftest.err conftest.i conftest.$ac_ext
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_linux320" >&5
printf "%s\n" "$libc_cv_linux320" >&6; }
if test "$libc_cv_linux320" != '3.2.0 or later'; then
  as_fn_error $? "GNU libc requires kernel header files from
Linux 3.2.0 or later to be installed before configuring.
The kernel header files are found usually in /usr/include/asm and
/usr/include/linux; make sure these directories use files from
Linux 3.2.0 or later.  This check uses <linux/version.h>, so
make sure that file was built correctly when installing the kernel header
files.  To use kernel headers not from /usr/include/linux, use the
configure option --with-headers." "$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 "$arch_minimum_kernel" || arch_minimum_kernel=3.2.0
if test -n "$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 $arch_version; then
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&5
printf "%s\n" "$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

{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for kernel header at least $minimum_kernel" >&5
printf %s "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)/'`;
abinumstr=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1.\2.\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 (void)
{

  ;
  return 0;
}
_ACEOF
if ac_fn_c_try_cpp "$LINENO"
then :
  libc_minimum_kernel=ok
else $as_nop
  libc_minimum_kernel='too old!'
fi
rm -f conftest.err conftest.i conftest.$ac_ext
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_minimum_kernel" >&5
printf "%s\n" "$libc_minimum_kernel" >&6; }
if test "$libc_minimum_kernel" = ok; then
  printf "%s\n" "#define __LINUX_KERNEL_VERSION $decnum" >>confdefs.h

  printf "%s\n" "#define __LINUX_KERNEL_VERSION_STR \"$abinumstr\"" >>confdefs.h

  printf "%s\n" "#define __ABI_TAG_VERSION $abinum" >>confdefs.h

else
  as_fn_error $? "*** The available kernel headers are older than the requested
*** compatible kernel version" "$LINENO" 5
fi

if test -n "$sysheaders"; then
  CPPFLAGS=$OLD_CPPFLAGS
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
  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for symlinks in ${ac_prefix}/include" >&5
printf %s "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
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ok" >&5
printf "%s\n" "ok" >&6; }
  fi
fi

# We have inlined syscalls.
printf "%s\n" "#define HAVE_INLINED_SYSCALLS 1" >>confdefs.h