Upstream

[japaric]

Some changes required to make this repo compatible with the rust-lang/rust repo. Most changes don't cause problems except for the new explicit core dependency which has a relative path (../libcore) that breaks standalone builds of this crate 😞.

cc @alexcrichton Even though I marked the core dependency as optional with the hope that Cargo won't even look at the path which doesn't exist, it still does.

[alexcrichton]

Perhaps we could take the route of libc? That way we'd leave the structure as-is here, but another Cargo.toml would be checked in to the rust-lang/rust repo (e.g. we wouldn't even use this repo's Cargo.toml during a bootstrap)

This is the libc_shim directory -- https://github.com/rust-lang/rust/tree/master/src/rustc/libc_shim

[homunkulus]

☔ The latest upstream changes (presumably #80) made this pull request unmergeable. Please resolve the merge conflicts.

[japaric]

Closing in favor of #97