[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):

 Replying to [ticket:69435 barracuda156]:
 > https://github.com/biojppm/c4core/issues/130
 > {{{
 > error: "unknown standard library"
 > }}}

 Per my remarks in that issue, I believe blacklisting Apple clang < 1100
 would be a workaround for this. I don't know if that will resolve the
 other errors.

 > On < 10.7 it does not find `git` during configure:

 It would be helpful to limit each ticket to a single issue. Somebody who
 has time and knowledge to solve one issue may not have time and knowledge
 to solve another issue so it is helpful for each problem to be in its own
 ticket so that each can be closed or left open as needed.

-- 
Ticket URL: <https://trac.macports.org/ticket/69435#comment:4>
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