Plenty of cenbuild packages place files in /usr/share/aclocal and /usr/share/pkgconfig folders. These folders are currently owned by cendio-build-automake and cendio-build-pkg-config. Technically, this means that every single cenbuild package that would want to place files in those folders would have to "Require" both automake and pkg-config. They are too many to be feasible, it is likely that these two folders are more suitable for a base package like cendio-build-filesystem.
