Version dependency

I want to make a change to a port that requires a change in another port. The ports are gdal and proj. The current versions of proj and gdal have problems such that gdal cannot dynamically link proj. In order for dynamic linking to work, I need to upgrade proj to version 4.5.0. I've already submitted a patch that upgrades gdal statically links proj. I'd like to change the gdal patch to dynamically link proj but the update to proj will have to go in simultaneously. What are the chances of that happening? Is there a way to make that happen? Is there a mechanism to make dependencies based on version? Thanks, Sean