--- opencv-3.1.0.orig/cmake/OpenCVDetectCXXCompiler.cmake	2015-12-18 16:02:16.000000000 +0100
+++ opencv-3.1.0/cmake/OpenCVDetectCXXCompiler.cmake	2016-02-26 22:27:55.409007293 +0100
@@ -71,6 +71,10 @@
                 OUTPUT_VARIABLE CMAKE_OPENCV_GCC_VERSION_FULL
                 OUTPUT_STRIP_TRAILING_WHITESPACE)
 
+  if (CMAKE_OPENCV_GCC_VERSION_FULL MATCHES "5")
+    set(CMAKE_OPENCV_GCC_VERSION_FULL  "5.0")
+  endif()
+
   execute_process(COMMAND ${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1} -v
                 ERROR_VARIABLE CMAKE_OPENCV_GCC_INFO_FULL
                 OUTPUT_STRIP_TRAILING_WHITESPACE)