Can someone revert my change https://github.com/apple/swift/commit/c85cbe5c785cd729b28e802bcfa69a549fa78df7 (current tip of master)? It caused a build failure on the 14.04 bot again:
In file included from allocator.c:21:
In file included from ./internal.h:616:
<>./shims.h:252:2: error: unsupported compiler
#error unsupported compiler
1 error generated.
It seems to be detecting/using /usr/bin/clang, which should be the right version to use, but somehow the setting isn't being passed down to the nested project.