[MacPorts] #71946: icon @9.5.1 is not using the right compiler nor flags

[MacPorts]

#71946: icon @9.5.1 is not using the right compiler nor flags
------------------------+---------------------------------
 Reporter:  ryandesign  |      Owner:  michael.grunewald@…
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  icon
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 From a build log shown in another ticket:

 {{{
 :info:build cc -c -I /opt/X11/include -w -DZPIPE data.c
 }}}

 Note that it is using `cc`; it is not UsingTheRightCompiler. It also isn't
 using MacPorts optimization flags nor `-arch` flags, and `-I
 /opt/X11/include` is not correct either.

 The makefile portgroup might be able to help fix these problems.

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Ticket URL: <https://trac.macports.org/ticket/71946>
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