MFB: fix the darwin 9 hack again; add the -O2 back in to avoid performance loss when not compiling for debug

configure.in

@@ -1260,7 +1260,7 @@ CC=$old_CC
 dnl Finish the Darwin hack
 if test "$php_did_darwin9_cheat" -eq 1; then
   if test "$PHP_DEBUG" = "yes"; then
-    CFLAGS=`echo "$CFLAGS" | $SED -e 's/-gstabs/-g/g'`
+    CFLAGS=`echo "-O2 $CFLAGS" | $SED -e 's/-gstabs/-g/g'`
   else
     CFLAGS=`echo "$CFLAGS" | $SED -e 's/-gstabs//g'`
   fi