`README.md` is outdated, references `ci/build.sh` which doesn't exist anymore

[cipherself]

libc/README.md

Line 68 in 2258bf0

See [`ci/build.sh`](https://github.com/rust-lang/libc/blob/HEAD/ci/build.sh) for

[tgross35]

Ah yeah, it should be ci/verify-build.sh now. Feel free to submit a PR if you're up for it.

[cipherself]

Ah yeah, it should be ci/verify-build.sh now. Feel free to submit a PR if you're up for it.

Sure thing, here we go #4263