[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):

 I tried installing a separate copy of `isl 0.14` in
 ${prefix}/libexec/isl14 and then configuring gcc48 to use that isl version
 in the configuration options. Sadly, it finds the include files for `isl
 0.18` first, and so it still errors out in the build.

 Will have to somehow either find a way to rearrange  the link to the
 include files for `isl 0.14` ahead of the standard include files in the
 build command, or find some other way to hide `isl 0.18` during the build.

 `isl 0.18` is being called in by cloog, of course.

 Or try the "gcc build directory" isl version idea instead.

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Ticket URL: <https://trac.macports.org/ticket/53662#comment:12>
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