160000 commit d0602246449795cf0a5f76126de55d7b0b630563	build-tools
040000 tree 4e195eaad8baa2676fed7e93886d11208c45baba	clang
040000 tree 2990e1ddc6cf89d12e57da410f61f39c874c08dd	gcc
160000 commit 10812113a483a5ea697c65e1135cb543532141b5	libprotobuf