Usage:
USES=eigen:<version>[,<type>]
version: 2 or 3 (required)
type: build (default), run
For example:
USES=eigen:2,build,run
will add a BUILD- and RUN_DEPENDS on math/eigen2, and
USES=eigen:3
will add a BUILD_DEPENDS on math/eigen3.
* Convert the existing ports to use it
- biology/iqtree: remove run time dependency (seemed not to be needed)
- graphics/movit: remove run time dependency (seemed not to be needed)
- science/avogadro: add run time dependeny (installed cmake file requires it to be present)
Reviewed by: rakuco, mat
Differential Revision: https://reviews.freebsd.org/D13702
