[MacPorts] #57911: libcxx @5.0.1_4: cc1plus: error: unrecognized command line option "-Wsign-conversion"

MacPorts noreply at macports.org
Tue Jan 15 21:43:25 UTC 2019

#57911: libcxx @5.0.1_4: cc1plus: error: unrecognized command line option "-Wsign-
  Reporter:  ryandesign  |      Owner:  jeremyhu
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  leopard
      Port:  libcxx      |

Comment (by kencu):

 that's what happens when you try to build libcxx with gcc (which is fairly
 easy to fix, BTW, but that's another story).

 Now libcxx does build and install on 10.5 Intel, exactly the same as it
 does on 10.6.8 in fact. (Builds with clang-3.4 initially, then upgrades to
 the +emulated_tls version using the current latest clang-5.0
 +emulated_tls. I have it installed like that, as does Riccardo.

 So it's a default compilers / blacklisting / fallback compiler selection
 thing on 10.5 Intel... always a bit of a PITA given our desire to not
 whitelist compilers.

Ticket URL: <https://trac.macports.org/ticket/57911#comment:1>
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