compile failure

[rhaschke]

Since Cython has recently changed its language_level default from Py2 to Py3 (cython/cython#2796), I get the following compile error:

file:/vol/famula/nightly/lib/python2.7/site-packages/Cython-3.0a0-py2.7-linux-x86_64.egg/Cython/Compiler/Main.py:366: FutureWarning: Cython directive 'language_level' not set, using '3str' for now (Py3). This has changed from earlier releases! File: /media/local/jenkins/jobs/libgpuarray-master-ci-deploy-lsp-famula-nightly/workspace/pygpu/collectives.pxd
  tree = Parsing.p_module(s, pxd, full_module_name)

Error compiling Cython file:
------------------------------------------------------------
...

    try:
        if is_c_cont:
            # Smallest in index dimension has the largest stride
            if src.ga.dimensions[0] % gpucount == 0:
                chosen_dim_size = src.ga.dimensions[0] / gpucount
                                                      ^
------------------------------------------------------------

pygpu/collectives.pyx:394:55: Cannot assign type 'double' to 'size_t'

Error compiling Cython file:
------------------------------------------------------------
...
            else:
                raise TypeError, "Source GpuArray cannot be split in %d c-contiguous arrays" % (gpucount)
        else:
            # Largest in index dimension has the largest stride
            if src.ga.dimensions[nd - 1] % gpucount == 0:
                chosen_dim_size = src.ga.dimensions[nd - 1] / gpucount
                                                           ^
------------------------------------------------------------

pygpu/collectives.pyx:408:60: Cannot assign type 'double' to 'size_t'

Do I need to pass the language_level (Py2) from the command line? Shouldn't that be extracted from the python executable that is running the install procedure?

[nouiz]

I do not now and don't have the time to investigate. But as a quick work-around, you could downgrade cython.