Rebuild old version of port?

[Ryan Schmidt]

On Oct 13, 2015, at 9:35 PM, Adam Dershowitz wrote:
> On Oct 13, 2015, at 5:19 PM, Ryan Schmidt wrote:
>> On Oct 13, 2015, at 2:43 PM, Adam Dershowitz wrote:
>> 
>>> It turns out that for the moment 2. didn’t work, as you had suggested, it seems that there is a bug that the OpenModelica has to fix for the new qt4-mac layout.  Is there any documentation, or hints, explaining the new layout, or what changes might be necessary?  Any guidance that I can pass along to those developers would be appreciated.  
>>> For now, I ended up doing 2, then having to downgrade qt4-mac as well, to get it to build, ,then having to downgrade a few other ports, to go with the old qt4-mac layout.
>> 
>> I believe the intention is that if the port developer uses the qt4 1.0 or qmake 1.0 portgroups, and the variables therein, things should just work, and all that should be needed after the layout changes is a revbump to rebuild the port. 
> 
> The only info I can find is this:  https://guide.macports.org/chunked/reference.portgroup.html  and it doesn’t say anything about qt4 or qmake.  Currently, the OpenModelica port doesn’t use portgroups.  Any suggestions for how to potentially get that port to use, would be very helpful.  That could potentially include incorporation of portgroups in the port.  The existing port works with qt4 4.8.7_1 and now fails with 4.8.7_2, and I am not really sure what variables are necessary, or how to fix it.

Correct, many portgroup are not documented in the guide. In those situations, the documentation is the portgroup file itself -- the source code and any comments -- and also any existing ports using the portgroup.