Issues seem(?) to only trigger when gcc13 is combined with musl.

https://bugs.gentoo.org/906363
--- a/modules/fbx/fbx_parser/FBXCommon.h
+++ b/modules/fbx/fbx_parser/FBXCommon.h
@@ -78,2 +78,3 @@
 
+#include <cstdint>
 #include <string>