[MacPorts] #54949: gcc5 @5.4.0_2 fails to build on macOS 10.13

[MacPorts]

#54949: gcc5 @5.4.0_2 fails to build on macOS 10.13
------------------------+------------------
 Reporter:  matteopuel  |      Owner:
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:  highsierra  |       Port:  gcc5
------------------------+------------------


--
Ticket URL: <https://trac.macports.org/ticket/54949>
MacPorts <https://www.macports.org/>
Ports system for macOS