[MacPorts] #36146: octave-devel build: no graphics display found

[MacPorts]

#36146: octave-devel build: no graphics display found
---------------------------+-------------------------
  Reporter:  vic@…         |      Owner:  michaelld@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.1.2
Resolution:                |   Keywords:
      Port:  octave-devel  |
---------------------------+-------------------------

Comment (by michaelld@…):

 What's going on is that during "configure", the provided compiler
 (MacPorts gcc of some version) is provided with a C++ file (conftest.cpp)
 but internally (via headers) some of the code is objective-c++ and the
 compiler isn't auto-switching to that language; hence, the test fails and
 the Carbon framework is not detected or used. Then when octave is executed
 there is no display detected (see "src/display.cc").  Thus, the real issue
 is that the new MacPorts' GCCs (at least gcc47) are not auto-selecting
 compile language correctly. I think this worked correctly a while back
 with MacPorts' GCCs; no idea what changed.

 I'm trying to work around this by compiling just "src/display.cc" using an
 Apple compiler (which does do the auto-language selections correctly);
 it's the only file that uses HAVE_FRAMEWORK_CARBON, so this seems
 reasonable. It's all looking good so far; more later.

-- 
Ticket URL: <https://trac.macports.org/ticket/36146#comment:5>
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