[MacPorts] #55382: cmake @3.10.0: Cannot find a C++ compiler supporting C++11 on this system

[MacPorts]

#55382: cmake @3.10.0: Cannot find a C++ compiler supporting C++11 on this system
-------------------------+-------------------------------------------------
  Reporter:  ryandesign  |      Owner:  michaelld
      Type:  defect      |     Status:  new
  Priority:  High        |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  tiger leopard snowleopard lion
      Port:  cmake       |  mountainlion
-------------------------+-------------------------------------------------

Comment (by kencu):

 Perhaps something like this:
 {{{
 # when using libc++, require Clang 3.4 or newer; Clang 3.3 produces
 # bad stream reading code. See also MP ticket #44129:
 # < https://trac.macports.org/ticket/44129 >
 # cmake no longer bootstraps with a non-c++11 compiler so force clang-3.7
 on
 # older systems (last clang that builds without cmake) and require libc++
 # to enable c++11 features
 platform darwin i386 {
     compiler.blacklist-append {clang < 500} macports-clang-3.3 *gcc*
     if {${os.version} < 13} {
         compiler.blacklist
         compiler.whitelist macports-clang-3.7
         depends_build-append port:libcxx
         configure.cxx_stdlib libc++
     }
 }

 platform darwin powerpc {
     compiler.blacklist
     compiler.whitelist macports-gcc-6
 }

 }}}

 There are various compiler and stdlib forces in the cmake Portfile that
 might need to be cleaned up to make sure this works out, including a part
 where the stdlib is forced back to libstdc++ later on in the portfile
 (which I've had to delete out of each cmake portfile to build it, btw).

--
Ticket URL: <https://trac.macports.org/ticket/55382#comment:6>
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