glibc/sysdeps/unix/sysv/linux/configure

# as_fn_set_status STATUS
# -----------------------
# Set $? to STATUS, without forking.
as_fn_set_status ()
{
  return $1
} # as_fn_set_status

# as_fn_exit STATUS
# -----------------
# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
as_fn_exit ()
{
  set +e
  as_fn_set_status $1
  exit $1
} # as_fn_exit
# as_fn_arith ARG...
# ------------------
# Perform arithmetic evaluation on the ARGs, and store the result in the
# global $as_val. Take advantage of shells that can avoid forks. The arguments
# must be portable across $(()) and expr.
if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
  eval 'as_fn_arith ()
  {
    as_val=$(( $* ))
  }'
else
  as_fn_arith ()
  {
    as_val=`expr "$@" || test $? -eq 1`
  }
fi # as_fn_arith

if expr a : '\(a\)' >/dev/null 2>&1 &&
   test "X`expr 00001 : '.*\(...\)'`" = X001; then
  as_expr=expr
else
  as_expr=false
fi

if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
  as_basename=basename
else
  as_basename=false
fi

as_me=`$as_basename -- "$0" ||
$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
	 X"$0" : 'X\(//\)$' \| \
	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
$as_echo X/"$0" |
    sed '/^.*\/\([^/][^/]*\)\/*$/{
	    s//\1/
	    q
	  }
	  /^X\/\(\/\/\)$/{
	    s//\1/
	    q
	  }
	  /^X\/\(\/\).*/{
	    s//\1/
	    q
	  }
	  s/.*/./; q'`


  as_lineno_1=$LINENO as_lineno_1a=$LINENO
  as_lineno_2=$LINENO as_lineno_2a=$LINENO
  eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" &&
  test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"' || {
  # Blame Lee E. McMahon (1931-1989) for sed's syntax.  :-)
  sed -n '
    p
    /[$]LINENO/=
  ' <$as_myself |
    sed '
      s/[$]LINENO.*/&-/
      t lineno
      b
      :lineno
      N
      :loop
      s/[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\)/\2\1\2/
      t loop
      s/-\n.*//
    ' >$as_me.lineno &&
  chmod +x "$as_me.lineno" ||
    { $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }

  # Don't try to exec as it changes $[0], causing all sort of problems
  # (the dirname of $[0] is not the place where we might find the
  # original and so on.  Autoconf is especially sensitive to this).
  . "./$as_me.lineno"
  # Exit status is that of the last command.
  exit
}

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

# 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


{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
if ${ac_cv_path_GREP+:} false; then :
  $as_echo_n "(cached) " >&6
else
  if test -z "$GREP"; then
  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
  $as_echo_n 0123456789 >"conftest.in"
  while :
  do
    cat "conftest.in" "conftest.in" >"conftest.tmp"
    mv "conftest.tmp" "conftest.in"
    cp "conftest.in" "conftest.nl"
    $as_echo 'GREP' >> "conftest.nl"
    "$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
    as_fn_arith $ac_count + 1 && ac_count=$as_val
    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
  if test -z "$ac_cv_path_GREP"; then
    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
  fi
else
  ac_cv_path_GREP=$GREP
fi

fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
$as_echo "$ac_cv_path_GREP" >&6; }
 GREP="$ac_cv_path_GREP"


{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
$as_echo_n "checking for egrep... " >&6; }
if ${ac_cv_path_EGREP+:} false; then :
  $as_echo_n "(cached) " >&6
else
  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
   then ac_cv_path_EGREP="$GREP -E"
   else
     if test -z "$EGREP"; then
  ac_path_EGREP_found=false
  # Loop through the user's path and test for each of PROGNAME-LIST
  as_save_IFS=$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
  $as_echo_n 0123456789 >"conftest.in"
  while :
  do
    cat "conftest.in" "conftest.in" >"conftest.tmp"
    mv "conftest.tmp" "conftest.in"
    cp "conftest.in" "conftest.nl"
    $as_echo 'EGREP' >> "conftest.nl"
    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
    as_fn_arith $ac_count + 1 && ac_count=$as_val
    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
  if test -z "$ac_cv_path_EGREP"; then
    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
  fi
else
  ac_cv_path_EGREP=$EGREP
fi

   fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
$as_echo "$ac_cv_path_EGREP" >&6; }
 EGREP="$ac_cv_path_EGREP"


{ $as_echo "$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_linux2619+:} 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+ 19) /* 2.6.19 */
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_linux2619='TOO OLD!'
else
  libc_cv_linux2619='2.6.19 or later'
fi
rm -f conftest*

fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_linux2619" >&5
$as_echo "$libc_cv_linux2619" >&6; }
if test "$libc_cv_linux2619" != '2.6.19 or later'; then
  as_fn_error $? "GNU libc requires kernel header files from
Linux 2.6.19 or later to be installed before configuring.
The kernel header files are found usually in /usr/include/asm and
/usr/include/linux; make sure these directories use files from
Linux 2.6.19 or later.  This check uses <linux/version.h>, so
make sure that file was built correctly when installing the kernel header
files.  To use kernel headers not from /usr/include/linux, use the
configure option --with-headers." "$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 "$arch_minimum_kernel" ||
case "$machine" in
  i386*)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.2.0
    ;;
  powerpc/powerpc32)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.2.0
    ;;
  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=2.2.0
    ;;
  x86_64*)
    arch_minimum_kernel=2.4.0
    ;;
  *)
    arch_minimum_kernel=2.2.0
    ;;
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
    { $as_echo "$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 < $decnum
eat flaming death
#endif
_ACEOF
if (eval "$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*

{ $as_echo "$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

# 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

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

case "$machine" in
  i[3456]86*)
    ldd_rewrite_script=sysdeps/unix/sysv/linux/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
  { $as_echo "$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