[MacPorts] #54387: CMake fails to determine size of 16-bit int

[MacPorts]

#54387: CMake fails to determine size of 16-bit int
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  Reporter:  mouse07410  |      Owner:
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  cmake       |
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Comment (by mouse07410):

 This error occurs when I try to compile an engine for OpenSSL, using
 Macports-installed cmake-3.8.2. That's where "OPENSSL_PATH" comes from.

 The "...unused during compilation..." error appears to be the cause. And
 indeed, {{{-Qunused-arguments}}} remedied the situation.

 Is there a way to make CMake configuration less susceptible to user-fed
 compiler flags?

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Ticket URL: <https://trac.macports.org/ticket/54387#comment:4>
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