--- cmake/GenerateExportHeader.orig.cmake	2016-12-01 22:17:48.000000000 +0100
+++ cmake/GenerateExportHeader.cmake	2017-03-11 15:39:23.610163005 +0100
@@ -164,7 +164,7 @@
   if(CMAKE_COMPILER_IS_GNUCXX)
     exec_program(${CMAKE_C_COMPILER} ARGS --version
       OUTPUT_VARIABLE _gcc_version_info)
-    string(REGEX MATCH "[3456]\\.[0-9]\\.[0-9]"
+    string(REGEX MATCH "[345678]\\.[0-9]\\.[0-9]"
       _gcc_version "${_gcc_version_info}")
     # gcc on mac just reports: "gcc (GCC) 3.3 20030304 ..." without the
     # patch level, handle this here: