The legacy-cc website hosts early versions of the first c compiler, created by the late dmr, which cannot be compiled with modern compilers like gcc. This nostalgic site celebrates the origins of a billion-dollar industry and provides a link to Aiju’s pdp-11/unix emulator for playing around with building the compiler. The author notes that the emulator currently has issues and welcomes anyone to create a VM image of Unix running on PDP-7 hardware. For those interested, a Research Unix Repository is also provided. Enjoy the trip down memory lane and play around with the historical compiler!
https://github.com/mortdeus/legacy-cc