compiz-bcop is a code generator that provides an easy way to handle plugin options by generating parts of the plugin code directly from the xml metadata file. It is used for most of the Compiz plugins. For correct installation, build in this order: compiz-bcop protobuf3 (optional but recommended) libcompizconfig compizconfig-python ccsm compiz-plugins-main compiz-plugins-extra (optional) compiz-plugins-experimental (optional) emerald (optional) emerald-themes (optional) fusion-icon (optional)