Binary compatibility of packages

[Nerixyz]

Hey, I wanted to add a port for cmark-gfm, GitHub's fork of cmark for GitHub flavored markdown parsing. I added the port in Nerixyz@1ddb566 for testing. It adds the targets unofficial::cmark-gfm::cmark-gfm and unofficial::cmark-gfm::cmark-gfm-extensions. The first one is similar to cmark 0.29.0 with an added plugin interface to be used by the second library. Now, I'm not sure about the "Ports in the current baseline must be installable simultaneously" section in the guidelines. cmark already exists in vcpkg. Both libraries can be installed with vcpkg install fine, as their names are different. However, one can't link to both libraries (i.e. link to cmark::cmark and unofficial::cmark-gfm::cmark-gfm-extensions in the same binary), since they use the same C function names. Does this rule out the port to be added to the baseline?