040000 tree 64d3a22a5b26afd614c66e3b4e5c8cf2c2755f40	Darwin-gcc3
040000 tree 4d37a76ef69dcadbdd07a3ce83f4424b43814221	Linux_x86-gcc3
040000 tree ba4ed3650951c34e3d706f3d926501c862a512a9	Linux_x86_64-gcc3
040000 tree c52d651680382819faac1cacb7daf239f5dc532b	WINNT_x86-msvc