[MacPorts] #52205: CMake PortGroup: set compiler explicitly

[MacPorts]

#52205: CMake PortGroup: set compiler explicitly
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  Reporter:  rjvbertin@…  |      Owner:  michaelld@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  cmake        |
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Comment (by rjvbertin@…):

 Agreed they shouldn't ever be empty, but aren't they?

 I have a recollection encountering a related variable (cflags?) that
 shouldn't be assumed to bet set. I can't seem to find the example right
 now :-/

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Ticket URL: <https://trac.macports.org/ticket/52205#comment:3>
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