--- /dev/null
+--- pfstools-1.8.5/configure.ac.orig 2011-10-27 10:40:19.000000000 +0200
++++ pfstools-1.8.5/configure.ac 2012-02-04 15:06:39.774740606 +0100
+@@ -24,13 +24,12 @@
+ AC_ARG_ENABLE(debug,
+ AS_HELP_STRING([--enable-debug],[Enable debug symbols and asserts]),
+ [if test "$enable_debug" = "yes" ; then
+- temp_CXXFLAGS=`echo $CXXFLAGS | sed "s/-O./ /; s/-g//"`
++ temp_CXXFLAGS=`echo $CXXFLAGS | sed "s/-O[0-9]/ /"`
+ CXXFLAGS="-g $temp_CXXFLAGS"
+ AC_DEFINE([DEBUG])
+ fi],
+ [enable_debug="no"
+- temp_CXXFLAGS=`echo $CXXFLAGS | sed "s/-O./ /; s/-g//"`
+- CXXFLAGS="-O3 $temp_CXXFLAGS"
++ CXXFLAGS="-O3 $CXXFLAGS"
+ AC_DEFINE(NDEBUG, 1, [Disable assertion checks])
+ ])
+