glibc/sysdeps/unix/sysv/linux/configure

# This file is generated from configure.in by Autoconf.  DO NOT EDIT!
 # Local configure fragment for sysdeps/unix/sysv/linux.

# The Linux kernel headers can be found in
#   /lib/modules/$(uname -r)/build/include
# Check whether this directory is available.
if test -z "$sysheaders" &&
   test "x$cross_compiling" = xno &&
   test -d /lib/modules/`uname -r`/build/include; then
  sysheaders="/lib/modules/`uname -r`/build/include"
  ccheaders=`$CC -print-file-name=include`
      SYSINCLUDES="-I $sysheaders"
fi

# 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

if test -n "$sysheaders"; then
  OLD_CPPFLAGS=$CPPFLAGS
  CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
fi


{ echo "$as_me:$LINENO: checking for grep that handles long lines and -e" >&5
echo $ECHO_N "checking for grep that handles long lines and -e... $ECHO_C" >&6; }
if test "${ac_cv_path_GREP+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
  # Extract the first word of "grep ggrep" to use in msg output
if test -z "$GREP"; then
set dummy grep ggrep; ac_prog_name=$2
if test "${ac_cv_path_GREP+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
  ac_path_GREP_found=false
# Loop through the user's path and test for each of PROGNAME-LIST
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
do
  IFS=$as_save_IFS
  test -z "$as_dir" && as_dir=.
  for ac_prog in grep ggrep; do
  for ac_exec_ext in '' $ac_executable_extensions; do
    ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
    { test -f "$ac_path_GREP" && $as_test_x "$ac_path_GREP"; } || continue
    # Check for GNU ac_path_GREP and select it if it is found.
  # Check for GNU $ac_path_GREP
case `"$ac_path_GREP" --version 2>&1` in
*GNU*)
  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
*)
  ac_count=0
  echo $ECHO_N "0123456789$ECHO_C" >"conftest.in"
  while :
  do
    cat "conftest.in" "conftest.in" >"conftest.tmp"
    mv "conftest.tmp" "conftest.in"
    cp "conftest.in" "conftest.nl"
    echo 'GREP' >> "conftest.nl"
    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
    ac_count=`expr $ac_count + 1`
    if test $ac_count -gt ${ac_path_GREP_max-0}; then
      # Best one so far, save it but keep looking for a better one
      ac_cv_path_GREP="$ac_path_GREP"
      ac_path_GREP_max=$ac_count
    fi
    # 10*(2^10) chars as input seems more than enough
    test $ac_count -gt 10 && break
  done
  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
esac


    $ac_path_GREP_found && break 3
  done
done

done
IFS=$as_save_IFS


fi

GREP="$ac_cv_path_GREP"
if test -z "$GREP"; then
  { { echo "$as_me:$LINENO: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&5
echo "$as_me: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&2;}
   { (exit 1); exit 1; }; }
fi

else
  ac_cv_path_GREP=$GREP
fi


fi
{ echo "$as_me:$LINENO: result: $ac_cv_path_GREP" >&5
echo "${ECHO_T}$ac_cv_path_GREP" >&6; }
 GREP="$ac_cv_path_GREP"


{ echo "$as_me:$LINENO: checking for egrep" >&5
echo $ECHO_N "checking for egrep... $ECHO_C" >&6; }
if test "${ac_cv_path_EGREP+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
   then ac_cv_path_EGREP="$GREP -E"
   else
     # Extract the first word of "egrep" to use in msg output
if test -z "$EGREP"; then
set dummy egrep; ac_prog_name=$2
if test "${ac_cv_path_EGREP+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
  ac_path_EGREP_found=false
# Loop through the user's path and test for each of PROGNAME-LIST
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
do
  IFS=$as_save_IFS
  test -z "$as_dir" && as_dir=.
  for ac_prog in egrep; do
  for ac_exec_ext in '' $ac_executable_extensions; do
    ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
    { test -f "$ac_path_EGREP" && $as_test_x "$ac_path_EGREP"; } || continue
    # Check for GNU ac_path_EGREP and select it if it is found.
  # Check for GNU $ac_path_EGREP
case `"$ac_path_EGREP" --version 2>&1` in
*GNU*)
  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
*)
  ac_count=0
  echo $ECHO_N "0123456789$ECHO_C" >"conftest.in"
  while :
  do
    cat "conftest.in" "conftest.in" >"conftest.tmp"
    mv "conftest.tmp" "conftest.in"
    cp "conftest.in" "conftest.nl"
    echo 'EGREP' >> "conftest.nl"
    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
    ac_count=`expr $ac_count + 1`
    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
      # Best one so far, save it but keep looking for a better one
      ac_cv_path_EGREP="$ac_path_EGREP"
      ac_path_EGREP_max=$ac_count
    fi
    # 10*(2^10) chars as input seems more than enough
    test $ac_count -gt 10 && break
  done
  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
esac


    $ac_path_EGREP_found && break 3
  done
done

done
IFS=$as_save_IFS


fi

EGREP="$ac_cv_path_EGREP"
if test -z "$EGREP"; then
  { { echo "$as_me:$LINENO: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&5
echo "$as_me: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&2;}
   { (exit 1); exit 1; }; }
fi

else
  ac_cv_path_EGREP=$EGREP
fi


   fi
fi
{ echo "$as_me:$LINENO: result: $ac_cv_path_EGREP" >&5
echo "${ECHO_T}$ac_cv_path_EGREP" >&6; }
 EGREP="$ac_cv_path_EGREP"


{ echo "$as_me:$LINENO: checking installed Linux kernel header files" >&5
echo $ECHO_N "checking installed Linux kernel header files... $ECHO_C" >&6; }
if test "${libc_cv_linux2010+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
  cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h.  */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h.  */
#include <linux/version.h>
#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE <  (2 *65536+ 0 *256+ 10) /* 2.0.10 */
eat flaming death
#endif
_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  $EGREP "eat flaming death" >/dev/null 2>&1; then
  libc_cv_linux2010='TOO OLD!'
else
  libc_cv_linux2010='2.0.10 or later'
fi
rm -f conftest*

fi
{ echo "$as_me:$LINENO: result: $libc_cv_linux2010" >&5
echo "${ECHO_T}$libc_cv_linux2010" >&6; }
if test "$libc_cv_linux2010" != '2.0.10 or later'; then
  { { echo "$as_me:$LINENO: 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.  To use kernel headers not from /usr/include/linux, use the
configure option --with-headers." >&5
echo "$as_me: 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.  To use kernel headers not from /usr/include/linux, use the
configure option --with-headers." >&2;}
   { (exit 1); exit 1; }; }
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 "$arch_minimum_kernel" ||
case "$machine" in
  alpha*)
    arch_minimum_kernel=2.1.100
    libc_cv_gcc_unwind_find_fde=yes
    ;;
  arm*)
    arch_minimum_kernel=2.0.10
    libc_cv_gcc_unwind_find_fde=yes
    ;;
  i386*)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.0.10
    ;;
  ia64*)
    arch_minimum_kernel=2.4.0
    ;;
  hppa*)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.4.19
    ;;
  m68k*)
    arch_minimum_kernel=2.0.10
    libc_cv_gcc_unwind_find_fde=yes
    ;;
  powerpc/powerpc32)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.0.10
    ;;
  powerpc/powerpc64)
    arch_minimum_kernel=2.4.21
    ;;
  s390/s390-32)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.2.10
    ;;
  s390/s390-64)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.4.0
    ;;
  sh*)
    arch_minimum_kernel=2.3.99
    libc_cv_gcc_unwind_find_fde=yes
    ;;
  sparc/sparc64*)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.4.21
    ;;
  sparc*)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.0.10
    ;;
  x86_64*)
    arch_minimum_kernel=2.4.0
    ;;
  *)
    arch_minimum_kernel=2.0.10
    ;;
esac
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 $arch_version; then
    { echo "$as_me:$LINENO: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&5
echo "$as_me: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&2;}
    minimum_kernel=$arch_minimum_kernel
  fi
else
  if test $arch_minimum_kernel != '2.0.10'; then
    minimum_kernel=$arch_minimum_kernel
  fi
fi

if test -n "$minimum_kernel"; then
  { echo "$as_me:$LINENO: checking for kernel header at least $minimum_kernel" >&5
echo $ECHO_N "checking for kernel header at least $minimum_kernel... $ECHO_C" >&6; }
  decnum=`echo "$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 >conftest.$ac_ext <<_ACEOF
/* confdefs.h.  */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h.  */
#include <linux/version.h>
#if LINUX_VERSION_CODE < $decnum
eat flaming death
#endif
_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  $EGREP "eat flaming death" >/dev/null 2>&1; then
  libc_minimum_kernel='too old!'
else
  libc_minimum_kernel=ok
fi
rm -f conftest*

  { echo "$as_me:$LINENO: result: $libc_minimum_kernel" >&5
echo "${ECHO_T}$libc_minimum_kernel" >&6; }
  if test "$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
    { { echo "$as_me:$LINENO: error: *** The available kernel headers are older than the requested
*** compatible kernel version" >&5
echo "$as_me: error: *** The available kernel headers are older than the requested
*** compatible kernel version" >&2;}
   { (exit 1); exit 1; }; }
  fi
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
# 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.
case "$prefix" in
/usr | /usr/)
  # 64-bit libraries on bi-arch platforms go in /lib64 instead of /lib.
  # Allow earlier configure scripts to handle libc_cv_slibdir, libdir,
  # and libc_cv_localedir.
  test -n "$libc_cv_slibdir" || \
  case $machine in
  sparc/sparc64 | x86_64 | powerpc/powerpc64 | s390/s390-64)
    libc_cv_slibdir="/lib64"
    if test "$libdir" = '${exec_prefix}/lib'; then
      libdir='${exec_prefix}/lib64';
      # Locale data can be shared between 32bit and 64bit libraries
      libc_cv_localedir='${exec_prefix}/lib/locale'
    fi
    ;;
  *)
    libc_cv_slibdir="/lib"
    ;;
  esac
  # Allow the user to override the path with --sysconfdir
  if test $sysconfdir = '${prefix}/etc'; then
    libc_cv_sysconfdir=/etc
  else
    libc_cv_sysconfdir=$sysconfdir
   fi
  libc_cv_rootsbindir="/sbin"
  ;;
esac

# 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

# We need some extensions to the `ldd' script.

case "$machine" in
  i[3456]86* | m68*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/ldd-rewrite.sed
    ;;
  ia64*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/ia64/ldd-rewrite.sed
    ;;
  s390*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
    ;;
  sparc*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
    ;;
  x86_64*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
    ;;
  powerpc*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed
    ;;
  *)
    ;;
esac


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
  { echo "$as_me:$LINENO: checking for symlinks in ${ac_prefix}/include" >&5
echo $ECHO_N "checking for symlinks in ${ac_prefix}/include... $ECHO_C" >&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
    { { echo "$as_me:$LINENO: 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
${ac_prefix}/include directory out of the way." >&5
echo "$as_me: 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
${ac_prefix}/include directory out of the way." >&2;}
   { (exit 1); exit 1; }; }
  else
    { echo "$as_me:$LINENO: result: ok" >&5
echo "${ECHO_T}ok" >&6; }
  fi
fi

# We have inlined syscalls.
cat >>confdefs.h <<\_ACEOF
#define HAVE_INLINED_SYSCALLS 1
_ACEOF