[MacPorts] #54417: unbound @1.6.4 builds with Clang 3.9 on SnowLeopard

[MacPorts]

#54417: unbound @1.6.4 builds with Clang 3.9 on SnowLeopard
------------------------+-------------------------
  Reporter:  ballapete  |      Owner:  nerdling
      Type:  request    |     Status:  accepted
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.1
Resolution:             |   Keywords:  snowleopard
      Port:  unbound    |
------------------------+-------------------------

Comment (by nerdling):

 I've attached a patch that worked for me: it loosens the compiler
 restriction on Snow Leopard while still ensuring the default compilers are
 not used.

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Ticket URL: <https://trac.macports.org/ticket/54417#comment:3>
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