[MacPorts] #61967: cctools +llvm11 fails to build gobject-introspection: Unknown command line argument '-macho'.

[MacPorts]

#61967: cctools +llvm11 fails to build gobject-introspection: Unknown command line
argument '-macho'.
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  Reporter:  blair    |      Owner:  jeremyhu
      Type:  defect   |     Status:  reopened
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  cctools  |
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Comment (by michaelld):

 Given that the current `cctools` variants are just "llvm10, llvm11,
 llvmdev, [+]xcode", we can patch the cctools `otool` code to use `--`
 instead of `-` for those arguments. I think that's the only change
 required.

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Ticket URL: <https://trac.macports.org/ticket/61967#comment:14>
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