https://github.com/spring/spring/pull/556

--- rts/Lua/LuaMaterial.h.orig	2021-01-01 19:08:25 UTC
+++ rts/Lua/LuaMaterial.h
@@ -6,6 +6,7 @@
 #include <cstring> // strcmp
 #include <string>
 #include <vector>
+#include <array>
 
 /*
 LuaMaterial