Use Boost_INCLUDE_DIR and EIGEN3_INCLUDE_DIR environment variables, if they exist.  Otherwise, do the default.
Use Boost_INCLUDE_DIR and EIGEN3_INCLUDE_DIR environment variables, if they exist.  Otherwise, do the default.

chunshen1987/DistributionSampling,chunshen1987/DistributionSampling,chunshen1987/DistributionSampling,chunshen1987/DistributionSampling,chunshen1987/DistributionSampling,chunshen1987/DistributionSampling