040000 tree 2a091930438ea841002e0abbbf7094475f223c5f	Darwin-gcc3
040000 tree 652387c4aeb4a6a7c67697e8d7cf658c1919f544	Linux_x86-gcc3
040000 tree c471e81d6e65becfe27e394fdb5d3e967bca99ba	Linux_x86_64-gcc3
040000 tree 155e1a13c3178626198e5d86a5c9e6d535430eb1	WINNT_x86-msvc