> 2. Horrible build system, giant dependency (worse than Boost here)... I wish they had gone header only like Eigen or ViennaCL. I assume that Eigen went heade

> 2. Horrible build system, giant dependency (worse than Boost here)... I wish they had gone header only like Eigen or ViennaCL. I assume that Eigen went header only because that library is mostly template metaprogramming (and a master class at that).