--- vxl-git4e07960/vcl/vcl_compiler.h~ 2012-11-02 12:08:21.000000000 +0100
+++ vxl-git4e07960/vcl/vcl_compiler.h 2015-02-15 13:50:46.376329878 +0100
@@ -119,6 +119,10 @@
# else
# define VCL_GCC_40
# endif
+# elif (__GNUC__== 5)
+// pretend GCC 5 to be GCC 4
+# define VCL_GCC_4
+# define VCL_GCC_41
# else
# error "Dunno about this gcc"
# endif