[fuhsnn]

c-testsuite itself was curated from simple-cc and tinycc's test files, the latter originated from picoc.

[degurechaff]

c-testsuite is amazing. i use it to test my compiler, but even after passing the test. my compiler still choke on some real world project. also the tests lack many of arcane preprocessor rules. so you still need to read https://www.spinellis.gr/blog/20060626/ in order to understand hideset and its macro expansion algorithm.

[fuhsnn]

Yeah, to get arcane macro tricks right I probably spent more than a full month total fighting with linked lists, never want to touch that part again.