3 true: annot, warn_A, warn_e, warn_no_44
5 <src/*.ml> or <lib/*.ml> and not "lib/sql_parser.ml": syntax_camlp4o, pkg_deriving.syntax
6 <lib/sql_parser.ml>: -annot
7 <src/*.top>: pkg_deriving, pkg_extlib, pkg_unix
8 "example" or "demo" or "impl": -traverse