[libc-commits] [libc] [libc] Clean up sysconf implementation and tests (PR #204130)

[Schrodinger ZHU Yifan via libc-commits]

https://github.com/SchrodingerZhu commented:

The sysconf cleanup looks good to me; however, I don't know if this is the most suitable way to also bring in `prlimit/sysinfo` syscall wrappers.

https://github.com/llvm/llvm-project/pull/204130