Changing port group default options

[Christopher Jones]

Hi,

> In my opinion increasing the version of the portgroup should be
> reserved for (fundamentally) incompatible changes or when the syntax
> changes. (For example when switching from qt4 to qt5 if the portgroup
> would initially be just "qt". Or if the python PortGroup would start
> working for software written in C++ with Python bindings.) I agree
> that this kind of change in the cmake PortGroup is almost the
> bordercase, but I feel that starting a new revision would introduce
> way more work than benefits.

Incompatible changes would warrant an increase to the *major* portgroup version, so from 1.0 to 2.0 say. Increasing it from 1.0 to 1.1 seems to me pretty suited to this case, and thus I agree would have been a good idea.

Chris
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