FAQ

Here are some answers to commonly asked questions and issues some people have come across.

Why does the Raco package page show failing tests and dependency problems?

This is because the FFI package R-cade uses (CSFML), is attempting to load the CSFML dynamic libraries on the Raco package manager, which doesn’t have them, and so fails to “run” the sources after compiling.

Currently I don’t know how to get around this.

On MacOS X R-cade crashes DrRacket

This bug was graciously fixed by elephanter! It was caused by the return type of an FFI function in the CSFML library being incorrect.

Be sure to get the latest version of the CSFML library with raco and you should be good to go!

The Linux version fails with FFI crash

If you see an error similar to this:

ffi-obj: couldn't get "sfText_getLineSpacing" from "libcsfml-graphics.so"

The issue here is with the packaged version of CSFML 2.5 being incorrect (and this has been reported to the CSFML maintainer). The header files are for 2.5, but the compiled binaries are still for version 2.4.

To get around this, download the CSFML source and build + install them yourself.

I get errors regarding shader compilation

The CRT shader is pretty simple, but on systems with older versions of OpenGL it may not compile successfully. The game should still run fine, though. If you don’t want to see the error message, you can pass #:shader #f to the run function to disable it.