[MacPorts] #43123: p5.12-mail-clamav: error: unknown argument: '-R/opt/local/lib' (was: Install amavisd-new fails to build pre-req p5.12-mail-clamav)

[MacPorts]

#43123: p5.12-mail-clamav: error: unknown argument: '-R/opt/local/lib'
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  Reporter:  horst.simon@…      |      Owner:  macports-tickets@…
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.2.1
Resolution:                     |   Keywords:
      Port:  p5.12-mail-clamav  |
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Comment (by ryandesign@…):

 We've seen a lot of this sort of error with the March 2014 command line
 tools; its clang is apparently stricter than old versions used to be.

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Ticket URL: <https://trac.macports.org/ticket/43123#comment:2>
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