[MacPorts] #57198: libgcc8: build fails when libunwind-headers is installed

[MacPorts]

#57198: libgcc8: build fails when libunwind-headers is installed
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  Reporter:  miken32  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.5.3
Resolution:           |   Keywords:
      Port:  libgcc8  |
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Comment (by rlhamil):

 cctools requires libunwind, and thus libunwind-headers.

 Replying to [comment:3 miken32]:
 > Confirmed, and I don't even know why it was installed; it must have been
 a build dependency for something.

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Ticket URL: <https://trac.macports.org/ticket/57198#comment:8>
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