Use libc definitions wherever they are provided #51
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Since gaol was first written, most system definitions have made their way into the libc crate (with good test coverage against various libc implementations and platforms).
This conversion was fairly mechanical. There's a mix of pulling libc definitions into the namespace and using the
libc::
. If there is a preference one way or the other I can certainly amend the commit with the preferred style. This codebase could probably use a goodrustfmt
too but for this change I avoided that (except for on platform/unix/process.rs which had been thoroughly touched already).r? @pcwalton