tree 57f0c352094a6cc404df3724856a7f115e4bd2d2
parent b347e64ab1599b9f33a4dd2bf41e4203c59d20a6
author Alex Crichton <alex@alexcrichton.com> 1477957469 -0700
committer Alex Crichton <alex@alexcrichton.com> 1478745900 -0800

Use `#[link(cfg(..))]` in preparation for libstd

In preparation for rust-lang/rust#37545 this is adding the appropriate
directives to libc to get included.