diff -Naur netsniff-ng-0.5.7.orig/src/CMakeLists.txt netsniff-ng-0.5.7/src/CMakeLists.txt
--- netsniff-ng-0.5.7.orig/src/CMakeLists.txt	2012-06-29 20:07:57.000000000 +0200
+++ netsniff-ng-0.5.7/src/CMakeLists.txt	2013-06-10 09:43:32.014721956 +0200
@@ -15,12 +15,8 @@
 INCLUDE(Pod2Man)
 
 ADD_DEFINITIONS(
-	-O3
-	-fstack-protector
 	-fpie
 	-std=gnu99
-	-fno-strict-aliasing
-	-D_FORTIFY_SOURCE=2
 	-D_REENTRANT
 	-march=native
 	-mtune=native
@@ -57,6 +53,7 @@
 	-Wfloat-equal
 	-Wunknown-pragmas
 	-Wunused-function
+	${OPTFLAGS}
 )
 
 IF (CMAKE_BUILD_TYPE STREQUAL profile)