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https://issues.apache.org/jira/browse/ARROW-1248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16100464#comment-16100464
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Wes McKinney commented on ARROW-1248:
-------------------------------------
PR: https://github.com/apache/arrow/pull/888
> [Python] C linkage warnings in Clang with public Cython API
> -----------------------------------------------------------
>
> Key: ARROW-1248
> URL: https://issues.apache.org/jira/browse/ARROW-1248
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Fix For: 0.6.0
>
>
> {code}
> /home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:4327:60:
> warning: 'pyarrow_unwrap_buffer' has C-linkage specified, but returns
> user-defined type 'std::shared_ptr<arrow::Buffer>' which is incompatible with
> C [-Wreturn-type-c-linkage]
> __PYX_EXTERN_C DL_EXPORT(std::shared_ptr< arrow::Buffer> )
> pyarrow_unwrap_buffer(PyObject *); /*proto*/
> ^
> /home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:4329:62:
> warning: 'pyarrow_unwrap_data_type' has C-linkage specified, but returns
> user-defined type 'std::shared_ptr<arrow::DataType>' which is incompatible
> with C [-Wreturn-type-c-linkage]
> __PYX_EXTERN_C DL_EXPORT(std::shared_ptr< arrow::DataType> )
> pyarrow_unwrap_data_type(PyObject *); /*proto*/
> ^
> /home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:4331:59:
> warning: 'pyarrow_unwrap_field' has C-linkage specified, but returns
> user-defined type 'std::shared_ptr<arrow::Field>' which is incompatible with
> C [-Wreturn-type-c-linkage]
> __PYX_EXTERN_C DL_EXPORT(std::shared_ptr< arrow::Field> )
> pyarrow_unwrap_field(PyObject *); /*proto*/
> ^
> /home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:4333:60:
> warning: 'pyarrow_unwrap_schema' has C-linkage specified, but returns
> user-defined type 'std::shared_ptr<arrow::Schema>' which is incompatible with
> C [-Wreturn-type-c-linkage]
> __PYX_EXTERN_C DL_EXPORT(std::shared_ptr< arrow::Schema> )
> pyarrow_unwrap_schema(PyObject *); /*proto*/
> ^
> /home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:4335:59:
> warning: 'pyarrow_unwrap_array' has C-linkage specified, but returns
> user-defined type 'std::shared_ptr<arrow::Array>' which is incompatible with
> C [-Wreturn-type-c-linkage]
> __PYX_EXTERN_C DL_EXPORT(std::shared_ptr< arrow::Array> )
> pyarrow_unwrap_array(PyObject *); /*proto*/
> ^
> /home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:4338:60:
> warning: 'pyarrow_unwrap_tensor' has C-linkage specified, but returns
> user-defined type 'std::shared_ptr<arrow::Tensor>' which is incompatible with
> C [-Wreturn-type-c-linkage]
> __PYX_EXTERN_C DL_EXPORT(std::shared_ptr< arrow::Tensor> )
> pyarrow_unwrap_tensor(PyObject *); /*proto*/
> ^
> /home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:4340:60:
> warning: 'pyarrow_unwrap_column' has C-linkage specified, but returns
> user-defined type 'std::shared_ptr<arrow::Column>' which is incompatible with
> C [-Wreturn-type-c-linkage]
> __PYX_EXTERN_C DL_EXPORT(std::shared_ptr< arrow::Column> )
> pyarrow_unwrap_column(PyObject *); /*proto*/
> ^
> /home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:4342:59:
> warning: 'pyarrow_unwrap_table' has C-linkage specified, but returns
> user-defined type 'std::shared_ptr<arrow::Table>' which is incompatible with
> C [-Wreturn-type-c-linkage]
> __PYX_EXTERN_C DL_EXPORT(std::shared_ptr< arrow::Table> )
> pyarrow_unwrap_table(PyObject *); /*proto*/
> ^
> /home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:4344:65:
> warning: 'pyarrow_unwrap_batch' has C-linkage specified, but returns
> user-defined type 'std::shared_ptr<arrow::RecordBatch>' which is incompatible
> with C [-Wreturn-type-c-linkage]
> __PYX_EXTERN_C DL_EXPORT(std::shared_ptr< arrow::RecordBatch> )
> pyarrow_unwrap_batch(PyObject *); /*proto*/
> {code}
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