040000 tree c944b1cd20a2ff48ae08413cda27d24c610adb96	binutils
040000 tree 90c974944f7bb4d4773e6a1fc1e8b7ba32c93149	gcc
040000 tree 16143db790d05afb1fa8a45778f0a8c633f1e9a6	gdb
040000 tree 225cb9f641ea52251d22222b54fdf023a728c4e3	qemu