configure

glibc 2.9,最新版的C语言库函数

# 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