What should a port do if 10.4 is not supported any more?

[Mojca Miklavec]

Hello,

I was playing with wxWidgets 2.9 a bit. It builds fine without 10.6
(QuickDraw has been removed recently), so I guess that there should
not be any issues on Mountain Lion any more, but on the other hand I
noticed that those changes don't support Tiger any more, so 2.9.4
(whenever it's going to be released) won't build/work on 10.4.

I wanted to submit a patch on trac which enables building with clang
and wanted to add a few patches to remove dependency on 10.6 SDK along
the way, but that second part (removing dependency on 10.6) means
dropping support for 10.4.

What is the general strategy for handling such situations in MacPorts?
I guess that other developers might reject my patch if it drops
support for 10.4, but with wxWidgets 2.9.4 on the way that is bound to
happen anyway, so it might make more sense to think about it earlier.

Mojca