[MacPorts] #69435: c4core is broken on Mojave and below when built with Clang

[MacPorts]

#69435: c4core is broken on Mojave and below when built with Clang
-------------------------+-------------------------------------------------
  Reporter:              |      Owner:  herbygillot
  barracuda156           |
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.9.1
Resolution:              |   Keywords:  mojave, highsierra, sierra,
                         |  elcapitan, yosemite, mavericks, mountainlion,
      Port:  c4core      |  lion, snowleopard, x86_64, i386
-------------------------+-------------------------------------------------

Comment (by ryandesign):

 In [changeset:"13e22051a97f5c566b394f5b8ec9aa50b89fb740/macports-ports"
 13e22051a97f5c566b394f5b8ec9aa50b89fb740/macports-ports] (master):
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="13e22051a97f5c566b394f5b8ec9aa50b89fb740"
 c4core: Blacklist clang < 1100

 See: https://trac.macports.org/ticket/69435
 }}}

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Ticket URL: <https://trac.macports.org/ticket/69435#comment:5>
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