160000 commit aa60c8d12bda0cb5d6b13e3d147e020623bab555	compiler-builtins
160000 commit 2b065db4e628e2b69e5b93225e654dbae1246eab	libc
160000 commit 52331ae5f05900ecf2c39002afa0414b033c1eab	rust