[MacPorts] #59892: mozjs60 fail on configure

[MacPorts]

#59892: mozjs60 fail on configure
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  Reporter:  vallon   |      Owner:  dbevans
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  mozjs60  |
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Comment (by vallon):

 Attached a portfile patch that turns off --disable-xcode-checks for >=
 Catalina (darwin >= 19).  I can send a PR, if you want to commit it.

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Ticket URL: <https://trac.macports.org/ticket/59892#comment:7>
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