[MacPorts] #41772: mapm3: error: non-void function 'add_to_seg_dist' should return a value

[MacPorts]

#41772: mapm3: error: non-void function 'add_to_seg_dist' should return a value
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  Reporter:  474403670@…  |      Owner:  ryandesign@…
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.2.1
Resolution:               |   Keywords:
      Port:  mapm3        |
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Comment (by ryandesign@…):

 Fixed port to use the right compiler and blacklisted clang in r114624 so
 now it at least builds. Later I can try to fix the code to make it compile
 with clang.

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Ticket URL: <https://trac.macports.org/ticket/41772#comment:3>
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