[jira] [Created] (ARROW-2734) Cython api example doesn't work by default on macOS

["Jonathan Chambers (JIRA)" <ji...@apache.org>]

Jonathan Chambers created ARROW-2734:
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             Summary: Cython api example doesn't work by default on macOS
                 Key: ARROW-2734
                 URL: https://issues.apache.org/jira/browse/ARROW-2734
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
    Affects Versions: 0.9.0
         Environment: macOS 10.13
            Reporter: Jonathan Chambers


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: 
{code:java}
os.environ['CFLAGS'] = '-std=c++11 -stdlib=libc++'
{code}
to setup.py

 

The second issue is that the line
{code:java}
ext.library_dirs.append(pa.get_library_dirs())
{code}
should be  
{code:java}
ext.library_dirs.extend(pa.get_library_dirs())
{code}
 

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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