040000 tree 7d9bb283bccbb9af1feabe8dfa321b5e4c1e4209	compiler-rt
040000 tree bc9337238e776c914f9c65f3e5a5c8337c924061	libcxx
040000 tree b95ce8d1b74f9c671ee339379e40343a9ab46551	libcxxabi
040000 tree 2d29e5dacf6f5d95d88db835af539ca038bc8ef0	libunwind