040000 tree 7495fc62a9501d55f79562e2335fce5e7b4547ba	abseil-cpp
040000 tree e7b4865658f1db1bc9b101b03625968aa5c954c2	benchmark
040000 tree 03e91785106ae53f5ce6d8bd25090336590a3cef	eigen
040000 tree c4ece94003049f65f9274545b072427218beea84	gflags
040000 tree 5cdce9ab5aab84df1d91de4117ceaa4f30993390	gtest