I like to play Eduke with texture filtering, so I am trying to apply the attached diff file to eduke32_src_20200304-8681.tar.xz. I have a patch file to enable texture filtering. I can already successfully build eduke32.exe from the source code. Yet when I try to apply the patch file, no matter what directory I chose, I get "this is not a working copy"
Can somebody help me? what am I doing wrong? The patch file is attached below. Thanks