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  1. Apache Arrow
  2. ARROW-2734

[Python] Cython api example doesn't work by default on macOS

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      Description

      The setup.py + example.pyx given in the docs:

      https://arrow.apache.org/docs/python/extending.html#example

      doesn't work on macOS.

       

      The first issue is the error:

      example.cpp:603:10: fatal error: 'unordered_map' file not found

      because (AFAIU) macOS clang doesn't include the required C++11 lib by default.

      This can be solved by adding: 

      os.environ['CFLAGS'] = '-std=c++11 -stdlib=libc++'
      

      to setup.py

       

      The second issue is that the line

      ext.library_dirs.append(pa.get_library_dirs())
      

      should be  

      ext.library_dirs.extend(pa.get_library_dirs())
      

       

      otherwise this causes a (completely uninformative) typerror during the build because library dirs ends up being a list of list instead of a list of string.

       

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              • Assignee:
                kszucs Krisztian Szucs
                Reporter:
                mangecoeur Jonathan Chambers
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