[MacPorts] #33259: cmake portgroup: out of source build option, possibly by default

[MacPorts]

#33259: cmake portgroup: out of source build option, possibly by default
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  Reporter:  ryandesign@…  |      Owner:  macports-tickets@…
      Type:  enhancement   |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:                |
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Comment (by mojca@…):

 I support committing it, along with a short notice to all maintainers
 responsible for Portfiles using the CMake PortGroup.

 The only thing I'm not sure about is whether the default for the option
 should be `yes` or `no`. We can do a bold move and then quickly fix
 whatever port breaks. Or we could be on the safe side, but then have a lot
 more work to do (setting the value to `yes` in every port, switch the
 default once all the ports are tested, then remove the option from all the
 ports again). Perhaps being a bit more adventurous would pay off and
 introduce less work.

-- 
Ticket URL: <https://trac.macports.org/ticket/33259#comment:31>
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