[MacPorts] #57573: arm-none-eabi-gcc: broken build on 10.13 / Xcode 10 (isl issue)

[MacPorts]

#57573: arm-none-eabi-gcc: broken build on 10.13 / Xcode 10 (isl issue)
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  Reporter:  mojca              |      Owner:  (none)
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:
Resolution:                     |   Keywords:
      Port:  arm-none-eabi-gcc  |
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Comment (by mojca):

 The build works after https://github.com/macports/macports-
 ports/pull/2988, but I probably need to add dependency on `isl` and I
 suspect other ports might be affected as well.

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Ticket URL: <https://trac.macports.org/ticket/57573#comment:2>
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