[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@…):

 And if people are worried about `file mkdir`, we can certainly change the
 PortGroup in such a way that there will be absolutely zero side effects
 unless one specifies "`cmake.out_of_source yes`".

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Ticket URL: <https://trac.macports.org/ticket/33259#comment:53>
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