glibc/nptl/sysdeps/pthread/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
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
}


# ac_fn_c_try_compile LINENO
# --------------------------
# Try to compile conftest.$ac_ext, and return whether this succeeded.
ac_fn_c_try_compile ()
{
  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
  rm -f conftest.$ac_objext
  if { { ac_try="$ac_compile"
case "(($ac_try" in
  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
  *) ac_try_echo=$ac_try;;
esac
eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
$as_echo "$ac_try_echo"; } >&5
  (eval "$ac_compile") 2>conftest.err
  ac_status=$?
  if test -s conftest.err; then
    grep -v '^ *+' conftest.err >conftest.er1
    cat conftest.er1 >&5
    mv -f conftest.er1 conftest.err
  fi
  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; } && {
	 test -z "$ac_c_werror_flag" ||
	 test ! -s conftest.err
       } && test -s conftest.$ac_objext; then :
  ac_retval=0
else
  $as_echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5

	ac_retval=1
fi
  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
  as_fn_set_status $ac_retval

} # ac_fn_c_try_compile
# This file is generated from configure.in by Autoconf.  DO NOT EDIT!

if test "x$libc_cv_gcc___thread" != xyes; then
  as_fn_error $? "compiler support for __thread is required" "$LINENO" 5
fi

if test "x${libc_cv_visibility_attribute}" != xyes ||
   test "x${libc_cv_broken_visibility_attribute}" != xno; then
  as_fn_error $? "working compiler support for visibility attribute is required" "$LINENO" 5
fi

if test "x$libc_cv_asm_cfi_directives" != xyes; then
    case "$base_machine" in
    i386 | x86_64 | powerpc | s390)
      as_fn_error $? "CFI directive support in assembler is required" "$LINENO" 5 ;;
    *) ;;
  esac
fi


{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for forced unwind support" >&5
$as_echo_n "checking for forced unwind support... " >&6; }
if ${libc_cv_forced_unwind+:} false; then :
  $as_echo_n "(cached) " >&6
else
  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */
#include <unwind.h>
int
main ()
{

struct _Unwind_Exception exc;
struct _Unwind_Context *context;
_Unwind_GetCFA (context)
  ;
  return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
  libc_cv_forced_unwind=yes
else
  libc_cv_forced_unwind=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_forced_unwind" >&5
$as_echo "$libc_cv_forced_unwind" >&6; }
if test $libc_cv_forced_unwind = yes; then
  $as_echo "#define HAVE_FORCED_UNWIND 1" >>confdefs.h

  old_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS -Werror -fexceptions"
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for C cleanup handling" >&5
$as_echo_n "checking for C cleanup handling... " >&6; }
if ${libc_cv_c_cleanup+:} false; then :
  $as_echo_n "(cached) " >&6
else
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */

extern void some_function (void);
void cl (void *a) { }
int
main ()
{

  int a __attribute__ ((cleanup (cl)));
  some_function ()
  ;
  return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
  libc_cv_c_cleanup=yes
else
  libc_cv_c_cleanup=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_c_cleanup" >&5
$as_echo "$libc_cv_c_cleanup" >&6; }
  CFLAGS="$old_CFLAGS"
  if test $libc_cv_c_cleanup = no; then
    as_fn_error $? "the compiler must support C cleanup handling" "$LINENO" 5
  fi
else
  as_fn_error $? "forced unwind support is required" "$LINENO" 5
fi