cmake BOOST_COMPUTE_HAVE_EIGEN examples

fabsig/GPBoost external_libs/compute/CMakeLists.txt :57 

option(BOOST_COMPUTE_HAVE_EIGEN "Have Eigen" OFF)

Jackarain/proxy third_party/boost/libs/compute/CMakeLists.txt :107 

option(BOOST_COMPUTE_HAVE_EIGEN "Have Eigen" OFF)