I also put up the source for my ‘null doom‘, for anyone who ever needs some massaged source to DooM that will compile with a C compiler, instead of needing something that can understand C++ style comments, although I know in cccp.c there is the ability to turn on cplusplus style processing.  However since I did want something that would compile without altering the compiler (too much) I thought it was best to just change all the comments.
And a quick download link to the zip file with the source & binaries.
Believe it or not, the first time I saw that game, was at the first LinuxWorld. An individual was playing on an Alpha running Linux (of course) and he was losing badly. The next day a Compaq chappie was trying to sync his iPaq also running Linux with it, and both were ignoring him…….
It’s always amazing how it’s gone from incredibly intensive to being trivial in terms of requirements.
Although I’ve found it a really good stress test for cross compilers.