detect Eigen, boost etc. even when not inside an aptly named subfolder (like "external")
might be difficult to do reliably, but seeing how common they are, it might even be ok to just blacklist subfolders like "boost-", "Eigen", "Eigen-" etc.
might be difficult to do reliably, but seeing how common they are, it might even be ok to just blacklist subfolders like "boost-", "Eigen", "Eigen-" etc.