[MacPorts] #66857: alex 3.2.7.1 fails to build

[MacPorts]

#66857: alex 3.2.7.1 fails to build
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  Reporter:  jsalort  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.1
Resolution:           |   Keywords:
      Port:  alex     |
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Comment (by kencu):

 ghc builds using an upstream ghc as the boot compiler.

 this boot compiler has a component that is a prebuilt static library that
 needs the symbols found only in the system libiconv to link siccessfully.

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Ticket URL: <https://trac.macports.org/ticket/66857#comment:12>
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