zorgnax/libtap ? reverse-engineered prompt

Build me a small C testing helper library that makes it easy to write TAP style tests for C programs.

I want to be able to include a header and use simple macros like plan, ok, is, isnt, cmp_ok, cmp_mem, like, unlike, pass, fail, dies_ok, lives_ok, skip, todo, diag, BAIL_OUT, and done_testing. It should print readable test output to stdout, include file and line info in failure messages, and handle planned tests, no plan, skipped tests, and TODO sections the way a lightweight test framework should.

Please make it easy to compile on Unix with a Makefile, and keep it portable enough that it also has a Windows build file if needed. Add a few example tests under a t folder so I can see how it works and verify the output matches TAP style. If anything needs looking up, check the current docs online first.