Hello, I'm using the latest version, r19, and I am having some problems on compilation. I want to use GRRLIB and I decided it would be better if instead of installing it in the compiler's include folder, I would just keep the only functions I need in my project and store the source of GRRLIB in the same place as the rest of my source code. So my file tree looks like this: Risen.pnproj Makefile sources main.cpp config.h config.cpp (etc.) GRRLIB grrlib.h GRRLIB_render.c (etc.) When I try to compile it tells me that I have undefined references to the GRRLIB functions I am using, which I guess means it cannot find the source files where they are defined. But if I move all the header and source files of GRRLIB in the "sources" folder, these problems disappear. Could someone please help me with this? Here's my project. I currently have two GRRLIB functions at the beginning main(); they are there for testing, I do not intend to leave them there. Also "gfx" folder and its contents are from Sand Traps, also for testing.