[Cython] Question on "numpy_common.pxi" in NumPy tests

Stefan Behnel stefan_ml at behnel.de
Wed Mar 28 08:49:21 CEST 2012

Lisandro Dalcin, 27.03.2012 21:34:
> On 27 March 2012 17:20, Stefan Behnel wrote:
>> the NumPy related tests use a file "numpy_common.pxi" that contains this
>> useless code:
>> """
>> cdef extern from *:
>>   bint FALSE "0"
>>   void import_array()
>>   void import_umath()
>> if FALSE:
>>    import_array()
>>    import_umath()
>> """
>> Does this serve any purpose? It currently leads to build failures of the
>> tests in C++ mode because the "import_umath()" call seems to inline code
>> with a bare "return" statement, which is not allowed in the module init
>> function (which returns a reference to the module).
>> Is there any reason why this can't just die?
> Oh! long long ago Cython testsuite was able to run without a single C
> compiler warning... That numpy common file was a hack to silent
> "defined but not used" warnings about the import array/umath functions
> defined in  NumPy headers.

Ok - in that case, it should be enough to move the import calls into a cdef
function body and "avoiding" to call that.

And a comment in the file would be helpful ...


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