--- yaml-1.0.1/config.m4.orig	2011-05-03 23:34:31.533821965 +0800
+++ yaml-1.0.1/config.m4	2011-05-04 09:00:02.329201758 +0800
@@ -33,7 +33,7 @@
   fi
 
   PHP_ADD_INCLUDE($PHP_YAML_DIR/include)
-  CFLAGS="-Wall -fno-strict-aliasing"
+  CFLAGS+=" -Wall -fno-strict-aliasing"
 
   export OLD_CPPFLAGS="$CPPFLAGS"
   export CPPFLAGS="$CPPFLAGS $INCLUDES -DHAVE_YAML"