040000 tree 7d9bb283bccbb9af1feabe8dfa321b5e4c1e4209	compiler-rt
040000 tree 7b8d0054ac3b3df9a369c0d04e3d1aac76f29ad5	libcxx
040000 tree 7df9c3ed3ef807ff994120842bccd4847acfe28c	libcxxabi
040000 tree ec29f3d6b16c62918d9b94da47e58e5891e015a3	libunwind