[MacPorts] #53662: gcc48: incompatible with isl 0.18

[MacPorts]

#53662: gcc48: incompatible with isl 0.18
-------------------------------------------------+-------------------------
  Reporter:  Alex-Vidal                          |      Owner:
                                                 |  MarcusCalhoun-Lopez
      Type:  defect                              |     Status:  assigned
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:
      Port:  gcc48 isl upc                       |
  dragonegg-3.3-gcc-4.8 dragonegg-3.4-gcc-4.8    |
-------------------------------------------------+-------------------------

Comment (by kencu):

 So maybe that is worth a try? Hopefully it would be used to build gcc and
 then deleted along with everything else in the build directory.

 I have never built gcc outside macports, so this is new ground for me.
 There are those on this list who have been building it for a decade or
 more.

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Ticket URL: <https://trac.macports.org/ticket/53662#comment:10>
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