+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${optCFLAGS}")
+
+# Try to make Mac a bit more complient to open source standards
+if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
+ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE")
+endif(CMAKE_SYSTEM_NAME MATCHES "Darwin")