[MacPorts] #67787: Detect other possible default -Werror compiler errors during configure

[MacPorts]

#67787: Detect other possible default -Werror compiler errors during configure
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  Reporter:  chrstphrchvz  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  base          |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:                |
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Comment (by ryandesign):

 See [1c483e276e41f88c0ccdd4f4defb412ad9591e06/macports-base] where I
 recently fixed base to match the llvm.org versions of the implicit
 function declaration errors. You should be able to add the int conversion
 and implicit int messages there too. Be sure to check if Apple clang and
 llvm.org clang have different message wordings and if so add both of them.

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Ticket URL: <https://trac.macports.org/ticket/67787#comment:1>
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