[gentoo-dev] RFC: fortran-2.eclass to depend on virtual/fortran

[justin]

Hi,

I want to add following change to fortran-2.eclass to achieve more
simpler usage.

The patch will make the eclass depend on virtual/fortran so that no
manual addition is needed.
Two exception are present, a) the ebuild has the USE flag fortran, then
we check for that, or b) the FORTRAN_OPTIONAL variable is set, which
leaves the control to the ebuild (e.g. for cases like "lapack? (
virtual/fortran )").

This is the best coverage of the use cases present, because

* most ebuild using the eclass want to have a fortran compiler
* most other trigger optional fortran support through USE=fortran
* only minor have different USE for this purpose (e.g. numpy)

Thanks for comments,

Justin