[MacPorts] #36373: arb 5.3_7 Build failed

[MacPorts]

#36373: arb 5.3_7 Build failed
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  Reporter:  ivan.gregor@…  |      Owner:  matt.cottrell@…
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.1.2
Resolution:                 |   Keywords:  lion
      Port:  arb            |
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Comment (by jmr@…):

 Could you try upgrading Xcode? Perhaps arb should not use -O4 (which
 enables -flto in llvm-gcc) with older Xcode versions, or at all if
 upgrading doesn't help.

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Ticket URL: <https://trac.macports.org/ticket/36373#comment:4>
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