Is your feature request related to a problem? Please describe.

I need to have teletext decoding via libzvbi

Proposed solution

Possible changes in portfile:

if("zvbi" IN_LIST FEATURES)
    set(OPTIONS "${OPTIONS} --enable-libzvbi")
else()
    set(OPTIONS "${OPTIONS} --disable-libzvbi")
endif()

Describe alternatives you've considered

No response

Additional context

No response