[libc-commits] [libc] [libc] Properly clear out errno in tests that check its value. (PR #131650)

[Alexey Samsonov via libc-commits]

vonosmas wrote:

> Couldn't we just make the macros like `EXPECT_MATH_ERRNO` or `ASSERT_ERRNO` set it after finishing?

No, because we need to clear out errno before the first invocation of function-under-test, and hence before the first call to `ASSERT_ERRNO`.

https://github.com/llvm/llvm-project/pull/131650