[MacPorts] #55641: zmq @4.2.3 fails to build on 10.7 and 10.8 due to C++11

[MacPorts]

#55641: zmq @4.2.3 fails to build on 10.7 and 10.8 due to C++11
-----------------------------+--------------------------------
  Reporter:  ryandesign      |      Owner:  merijn
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.4.2
Resolution:                  |   Keywords:  lion, mountainlion
      Port:  zmq, zmq-devel  |
-----------------------------+--------------------------------

Comment (by kencu):

 Several fairly easy ways to disable c++11 on zmq, should that ever be
 desired:
 1. comment out  the test for cxx11 in `configure.ac`
 {{{
 #AX_CXX_COMPILE_STDCXX_11([ext], [optional])
 }}}
  (more fancy, that test could be wrapped in an option block to make it a
 full configure argument (upstream)).

 2. set env variables during configure to preset results of the c++11 tests
 as failing:
 {{{
 configure.env-append ax_cv_cxx_compile_cxx11=no
 configure.env-append ax_cv_cxx_compile_cxx11__std_gnupp11=no
 configure.env-append ax_cv_cxx_compile_cxx11__std_gnupp0x=no
 }}}
  (These env variable names are found in `config.log`.)

 3. post-configure, reinplace the results of the config variable
 `HAVE_CXX11` `in source/platform.hpp`

 4. switch to the cmake build, and wrap the c++11 tests in an option
 variable

--
Ticket URL: <https://trac.macports.org/ticket/55641#comment:7>
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