[MacPorts] #31046: py27-matplotlib fails to build with clang (Xcode 4.2)

[MacPorts]

#31046: py27-matplotlib fails to build with clang (Xcode 4.2)
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  Reporter:  rex_4539@…          |       Owner:  ram@…           
      Type:  defect              |      Status:  reopened        
  Priority:  Normal              |   Milestone:                  
 Component:  ports               |     Version:                  
Resolution:                      |    Keywords:  clang           
      Port:  py27-matplotlib     |  
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Comment(by ryandesign@…):

 The way py-numpy does it looks like an awful mess. Are you sure we can't
 just modify the python portgroup to set the CC and CXX environment
 variables to the correct values at pre-build time, like it already does
 for the CFLAGS, CXXFLAGS, etc. variables?

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Ticket URL: <https://trac.macports.org/ticket/31046#comment:20>
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