--- a/CMake/vtkCompilerExtras.cmake	2014-01-22 16:55:41.000000000 +0100
+++ b/CMake/vtkCompilerExtras.cmake.new	2016-07-11 21:28:48.107362104 +0200
@@ -27,10 +27,10 @@
     OUTPUT_VARIABLE _gcc_version_info
     ERROR_VARIABLE _gcc_version_info)
 
-  string (REGEX MATCH "[345]\\.[0-9]\\.[0-9]"
+  string (REGEX MATCH "[0-9]\\.[0-9]\\.[0-9]"
     _gcc_version "${_gcc_version_info}")
   if(NOT _gcc_version)
-    string (REGEX REPLACE ".*\\(GCC\\).* ([34]\\.[0-9]) .*" "\\1.0"
+    string (REGEX REPLACE ".*\\(GCC\\).* ([0-9]\\.[0-9]) .*" "\\1.0"
       _gcc_version "${_gcc_version_info}")
   endif()
 
--- a/CMake/GenerateExportHeader.cmake	2014-01-22 16:55:41.000000000 +0100
+++ b/CMake/GenerateExportHeader.cmake.new	2016-07-11 21:28:47.977361853 +0200
@@ -166,12 +166,12 @@
     execute_process(COMMAND ${CMAKE_C_COMPILER} --version
       OUTPUT_VARIABLE _gcc_version_info
       ERROR_VARIABLE _gcc_version_info)
-    string(REGEX MATCH "[345]\\.[0-9]\\.[0-9]"
+    string(REGEX MATCH "[0-9]\\.[0-9]\\.[0-9]"
       _gcc_version "${_gcc_version_info}")
     # gcc on mac just reports: "gcc (GCC) 3.3 20030304 ..." without the
     # patch level, handle this here:
     if(NOT _gcc_version)
-      string(REGEX REPLACE ".*\\(GCC\\).* ([34]\\.[0-9]) .*" "\\1.0"
+      string(REGEX REPLACE ".*\\(GCC\\).* ([0-9]\\.[0-9]) .*" "\\1.0"
         _gcc_version "${_gcc_version_info}")
     endif()