> ...it must allow build parameters for each step to be defined by the dependent libraries or programs... Which will (given enough code being built) lead to in

> ...it must allow build parameters for each step to be defined by the dependent libraries or programs... Which will (given enough code being built) lead to incompatible flags amongst dependent packages. Compilers may or may not, at build or link time, give sensible error messages. It would be a very sophisticated package manager that could warn you of these sorts of conflicts at specification or installation time.