[MacPorts] #37074: opencv fails to install (opencv @2.4.3, Revision 1)

[MacPorts]

#37074: opencv fails to install (opencv @2.4.3, Revision 1)
---------------------+--------------------------------
 Reporter:  david@…  |      Owner:  macports-tickets@…
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.1.2
 Keywords:           |       Port:
---------------------+--------------------------------
 opencv @2.4.3, Revision 1 fails to install. From the log:

 {{{
 :info:configure CMake Error at
 /opt/local/share/cmake-2.8/Modules/CMakeDetermineCXXCompiler.cmake:43
 (MESSAGE):
 :info:configure   Could not find compiler set in environment variable CXX:
 :info:configure
 :info:configure   /opt/local/bin/g++-apple-4.2.
 }}}

 Installing the `apple-gcc42` port fixes the problem.

 I looked at the opencv Portfile and it doesn't specify `apple-gcc42`
 explicitly, it only blacklists gcc-4.0 and llvm-gcc-4.2 and clang.

 I don't know if it is possible to specify "any 1 of x or y or z compiler
 ports" as a dependency, and give a nicer error message if that dependency
 isn't met? We probably don't want to explicitly set `apple-gcc42` as a
 build requirement, because the user might have another valid compiler
 available.

-- 
Ticket URL: <https://trac.macports.org/ticket/37074>
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