+echo "$as_me:3400: checking for fgrep" >&5
+echo $ECHO_N "checking for fgrep... $ECHO_C" >&6
+if test "${ac_cv_path_FGREP+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ if echo 'ab*c' | $GREP -F 'ab*c' >/dev/null 2>&1
+ then ac_cv_path_FGREP="$GREP -F"
+ else
+ for ac_prog in gfgrep fgrep
+do
+ # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+echo "$as_me:3412: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_path_FGREP+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ case $FGREP in
+ [\\/]* | ?:[\\/]*)
+ ac_cv_path_FGREP="$FGREP" # Let the user override the test with a path.
+ ;;
+ *)
+ ac_save_IFS=$IFS; IFS=$ac_path_separator
+ac_dummy="$PATH"
+for ac_dir in $ac_dummy; do
+ IFS=$ac_save_IFS
+ test -z "$ac_dir" && ac_dir=.
+ if $as_executable_p "$ac_dir/$ac_word"; then
+ ac_cv_path_FGREP="$ac_dir/$ac_word"
+ echo "$as_me:3429: found $ac_dir/$ac_word" >&5
+ break
+fi
+done
+
+ ;;
+esac
+fi
+FGREP=$ac_cv_path_FGREP
+
+if test -n "$FGREP"; then
+ echo "$as_me:3440: result: $FGREP" >&5
+echo "${ECHO_T}$FGREP" >&6
+else
+ echo "$as_me:3443: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+ test -n "$FGREP" && break
+done
+test -n "$FGREP" || FGREP=": "
+
+ test "x$ac_cv_path_FGREP" = "x:" && { { echo "$as_me:3451: error: cannot find workable fgrep" >&5
+echo "$as_me: error: cannot find workable fgrep" >&2;}
+ { (exit 1); exit 1; }; }
+ fi
+fi
+echo "$as_me:3456: result: $ac_cv_path_FGREP" >&5
+echo "${ECHO_T}$ac_cv_path_FGREP" >&6
+ FGREP="$ac_cv_path_FGREP"
+
+echo "$as_me:3460: checking if you want to use C11 _Noreturn feature" >&5
+echo $ECHO_N "checking if you want to use C11 _Noreturn feature... $ECHO_C" >&6
+
+# Check whether --enable-stdnoreturn or --disable-stdnoreturn was given.
+if test "${enable_stdnoreturn+set}" = set; then
+ enableval="$enable_stdnoreturn"
+ test "$enableval" != yes && enableval=no
+ if test "$enableval" != "no" ; then
+ enable_stdnoreturn=yes
+ else
+ enable_stdnoreturn=no
+ fi
+else
+ enableval=no
+ enable_stdnoreturn=no
+
+fi;
+echo "$as_me:3477: result: $enable_stdnoreturn" >&5
+echo "${ECHO_T}$enable_stdnoreturn" >&6
+
+if test $enable_stdnoreturn = yes; then
+echo "$as_me:3481: checking for C11 _Noreturn feature" >&5
+echo $ECHO_N "checking for C11 _Noreturn feature... $ECHO_C" >&6
+if test "${cf_cv_c11_noreturn+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ cat >"conftest.$ac_ext" <<_ACEOF
+#line 3487 "configure"
+#include "confdefs.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdnoreturn.h>
+static _Noreturn void giveup(void) { exit(0); }
+
+int
+main (void)
+{
+if (feof(stdin)) giveup()
+ ;
+ return 0;
+}
+_ACEOF
+rm -f "conftest.$ac_objext"
+if { (eval echo "$as_me:3504: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:3507: \$? = $ac_status" >&5
+ (exit "$ac_status"); } &&
+ { ac_try='test -s "conftest.$ac_objext"'
+ { (eval echo "$as_me:3510: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:3513: \$? = $ac_status" >&5
+ (exit "$ac_status"); }; }; then
+ cf_cv_c11_noreturn=yes
+else
+ echo "$as_me: failed program was:" >&5
+cat "conftest.$ac_ext" >&5
+cf_cv_c11_noreturn=no
+fi
+rm -f "conftest.$ac_objext" "conftest.$ac_ext"
+
+fi
+echo "$as_me:3524: result: $cf_cv_c11_noreturn" >&5
+echo "${ECHO_T}$cf_cv_c11_noreturn" >&6
+else
+ cf_cv_c11_noreturn=no,
+fi
+
+if test "$cf_cv_c11_noreturn" = yes; then
+
+cat >>confdefs.h <<\EOF
+#define HAVE_STDNORETURN_H 1
+EOF
+
+cat >>confdefs.h <<EOF
+#define STDC_NORETURN _Noreturn
+EOF
+
+ HAVE_STDNORETURN_H=1
+else
+ HAVE_STDNORETURN_H=0
+fi
+
+if test "$GCC" = yes || test "$GXX" = yes