[PATCH] D27295: Remove existing file in a separate thread asynchronously.

[Rafael Avila de Espindola via llvm-commits]

Joerg Sonnenberger via llvm-commits <llvm-commits at lists.llvm.org>
writes:

> Even worse, renameat would rule out a lot of older systems for no good
> reason.

Is linkat available? The main thing I would like to solve is us leaving
temp files on crashes, which requires some way of giving a name to an
open fd. With linkat we would have to unlink the old file first, but we
are already doing it for performance anyway.

Cheers,
Rafael