Python distutils.extension.Extension() Examples

def test_optional_extension(self):

        # this extension will fail, but let's ignore this failure
        # with the optional argument.
        modules = [Extension('foo', ['xxx'], optional=False)]
        dist = Distribution({'name': 'xx', 'ext_modules': modules})
        cmd = self.build_ext(dist)
        cmd.ensure_finalized()
        self.assertRaises((UnknownFileError, CompileError),
                          cmd.run)  # should raise an error

        modules = [Extension('foo', ['xxx'], optional=True)]
        dist = Distribution({'name': 'xx', 'ext_modules': modules})
        cmd = self.build_ext(dist)
        cmd.ensure_finalized()
        cmd.run()  # should pass 

def generate_extensions(ext_modules, line_trace=False):

    extensions = []

    if line_trace:
        print("define cython trace to True ...")
        define_macros = [('CYTHON_TRACE', 1), ('CYTHON_TRACE_NOGIL', 1)]
    else:
        define_macros = []

    for pyxfile in ext_modules:
        ext = Extension(name='.'.join(pyxfile.split('/'))[:-4],
                        sources=[pyxfile],
                        define_macros=define_macros)
        extensions.append(ext)
    return extensions 

def test_get_outputs(self):
        pkg_dir, dist = self.create_dist()
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = pkg_dir
        f = os.path.join(pkg_dir, 'foo.py')
        self.write_file(f, '# python file')
        cmd.distribution.py_modules = [pkg_dir]
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = [pkg_dir]
        cmd.distribution.script_name = 'setup.py'

        # get_output should return 4 elements
        self.assertTrue(len(cmd.get_outputs()) >= 2) 

def test_get_inputs(self):
        pkg_dir, dist = self.create_dist()
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = pkg_dir
        f = os.path.join(pkg_dir, 'foo.py')
        self.write_file(f, '# python file')
        cmd.distribution.py_modules = [pkg_dir]
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = [pkg_dir]
        cmd.distribution.script_name = 'setup.py'

        # get_input should return 2 elements
        self.assertEqual(len(cmd.get_inputs()), 2) 

def test_get_outputs(self):
        pkg_dir, dist = self.create_dist()
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = pkg_dir
        f = os.path.join(pkg_dir, 'foo.py')
        self.write_file(f, '# python file')
        cmd.distribution.py_modules = [pkg_dir]
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = [pkg_dir]
        cmd.distribution.script_name = 'setup.py'

        # get_output should return 4 elements
        self.assertGreaterEqual(len(cmd.get_outputs()), 2) 

def test_get_inputs(self):
        pkg_dir, dist = self.create_dist()
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = pkg_dir
        f = os.path.join(pkg_dir, 'foo.py')
        self.write_file(f, '# python file')
        cmd.distribution.py_modules = [pkg_dir]
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = [pkg_dir]
        cmd.distribution.script_name = 'setup.py'

        # get_input should return 2 elements
        self.assertEqual(len(cmd.get_inputs()), 2) 

def run(self):
        # add numpy headers
        import numpy
        self.include_dirs.append(numpy.get_include())

        # add dimod headers
        include = os.path.join(os.path.dirname(__file__), 'dimod', 'include')
        self.include_dirs.append(include)

        if self.build_tests:

            test_extensions = [Extension('*', ['tests/test_*'+ext])]
            if USE_CYTHON:
                test_extensions = cythonize(test_extensions,
                                            # annotate=True
                                            )
            self.extensions.extend(test_extensions)

        super().run() 

def test_get_outputs(self):
        pkg_dir, dist = self.create_dist()
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = pkg_dir
        f = os.path.join(pkg_dir, 'foo.py')
        self.write_file(f, '# python file')
        cmd.distribution.py_modules = [pkg_dir]
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = [pkg_dir]
        cmd.distribution.script_name = 'setup.py'

        # get_output should return 4 elements
        self.assertGreaterEqual(len(cmd.get_outputs()), 2) 

def test_get_outputs(self):
        project_dir, dist = self.create_dist()
        os.chdir(project_dir)
        os.mkdir('spam')
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = self.mkdtemp()
        f = os.path.join(project_dir, 'spam', '__init__.py')
        self.write_file(f, '# python package')
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = ['spam']
        cmd.distribution.script_name = 'setup.py'

        # get_outputs should return 4 elements: spam/__init__.py and .pyc,
        # foo.import-tag-abiflags.so / foo.pyd
        outputs = cmd.get_outputs()
        self.assertEqual(len(outputs), 4, outputs) 

def test_get_inputs(self):
        project_dir, dist = self.create_dist()
        os.chdir(project_dir)
        os.mkdir('spam')
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = self.mkdtemp()
        f = os.path.join(project_dir, 'spam', '__init__.py')
        self.write_file(f, '# python package')
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = ['spam']
        cmd.distribution.script_name = 'setup.py'

        # get_inputs should return 2 elements: spam/__init__.py and
        # foo.import-tag-abiflags.so / foo.pyd
        inputs = cmd.get_inputs()
        self.assertEqual(len(inputs), 2, inputs) 

def test_optional_extension(self):

        # this extension will fail, but let's ignore this failure
        # with the optional argument.
        modules = [Extension('foo', ['xxx'], optional=False)]
        dist = Distribution({'name': 'xx', 'ext_modules': modules})
        cmd = self.build_ext(dist)
        cmd.ensure_finalized()
        self.assertRaises((UnknownFileError, CompileError),
                          cmd.run)  # should raise an error

        modules = [Extension('foo', ['xxx'], optional=True)]
        dist = Distribution({'name': 'xx', 'ext_modules': modules})
        cmd = self.build_ext(dist)
        cmd.ensure_finalized()
        cmd.run()  # should pass 

def test_get_inputs(self):
        pkg_dir, dist = self.create_dist()
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = pkg_dir
        f = os.path.join(pkg_dir, 'foo.py')
        self.write_file(f, '# python file')
        cmd.distribution.py_modules = [pkg_dir]
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = [pkg_dir]
        cmd.distribution.script_name = 'setup.py'

        # get_input should return 2 elements
        self.assertEqual(len(cmd.get_inputs()), 2) 

def test_get_outputs(self):
        project_dir, dist = self.create_dist()
        os.chdir(project_dir)
        os.mkdir('spam')
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = self.mkdtemp()
        f = os.path.join(project_dir, 'spam', '__init__.py')
        self.write_file(f, '# python package')
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = ['spam']
        cmd.distribution.script_name = 'setup.py'

        # get_outputs should return 4 elements: spam/__init__.py and .pyc,
        # foo.import-tag-abiflags.so / foo.pyd
        outputs = cmd.get_outputs()
        self.assertEqual(len(outputs), 4, outputs) 

def test_get_inputs(self):
        project_dir, dist = self.create_dist()
        os.chdir(project_dir)
        os.mkdir('spam')
        cmd = install_lib(dist)

        # setting up a dist environment
        cmd.compile = cmd.optimize = 1
        cmd.install_dir = self.mkdtemp()
        f = os.path.join(project_dir, 'spam', '__init__.py')
        self.write_file(f, '# python package')
        cmd.distribution.ext_modules = [Extension('foo', ['xxx'])]
        cmd.distribution.packages = ['spam']
        cmd.distribution.script_name = 'setup.py'

        # get_inputs should return 2 elements: spam/__init__.py and
        # foo.import-tag-abiflags.so / foo.pyd
        inputs = cmd.get_inputs()
        self.assertEqual(len(inputs), 2, inputs) 

def test_extension_init(self):
        # the first argument, which is the name, must be a string
        self.assertRaises(AssertionError, Extension, 1, [])
        ext = Extension('name', [])
        self.assertEqual(ext.name, 'name')

        # the second argument, which is the list of files, must
        # be a list of strings
        self.assertRaises(AssertionError, Extension, 'name', 'file')
        self.assertRaises(AssertionError, Extension, 'name', ['file', 1])
        ext = Extension('name', ['file1', 'file2'])
        self.assertEqual(ext.sources, ['file1', 'file2'])

        # others arguments have defaults
        for attr in ('include_dirs', 'define_macros', 'undef_macros',
                     'library_dirs', 'libraries', 'runtime_library_dirs',
                     'extra_objects', 'extra_compile_args', 'extra_link_args',
                     'export_symbols', 'swig_opts', 'depends'):
            self.assertEqual(getattr(ext, attr), [])

        self.assertEqual(ext.language, None)
        self.assertEqual(ext.optional, None)

        # if there are unknown keyword options, warn about them
        with check_warnings() as w:
            warnings.simplefilter('always')
            ext = Extension('name', ['file1', 'file2'], chic=True)

        self.assertEqual(len(w.warnings), 1)
        self.assertEqual(str(w.warnings[0].message),
                          "Unknown Extension options: 'chic'") 

def test_build_ext(self):
        global ALREADY_TESTED
        copy_xxmodule_c(self.tmp_dir)
        xx_c = os.path.join(self.tmp_dir, 'xxmodule.c')
        xx_ext = Extension('xx', [xx_c])
        dist = Distribution({'name': 'xx', 'ext_modules': [xx_ext]})
        dist.package_dir = self.tmp_dir
        cmd = self.build_ext(dist)
        fixup_build_ext(cmd)
        cmd.build_lib = self.tmp_dir
        cmd.build_temp = self.tmp_dir

        old_stdout = sys.stdout
        if not support.verbose:
            # silence compiler output
            sys.stdout = StringIO()
        try:
            cmd.ensure_finalized()
            cmd.run()
        finally:
            sys.stdout = old_stdout

        if ALREADY_TESTED:
            self.skipTest('Already tested in %s' % ALREADY_TESTED)
        else:
            ALREADY_TESTED = type(self).__name__

        import xx

        for attr in ('error', 'foo', 'new', 'roj'):
            self.assertTrue(hasattr(xx, attr))

        self.assertEqual(xx.foo(2, 5), 7)
        self.assertEqual(xx.foo(13,15), 28)
        self.assertEqual(xx.new().demo(), None)
        if support.HAVE_DOCSTRINGS:
            doc = 'This is a template module just for instruction.'
            self.assertEqual(xx.__doc__, doc)
        self.assertIsInstance(xx.Null(), xx.Null)
        self.assertIsInstance(xx.Str(), xx.Str) 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        print extra_postargs
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile


# run the customize_compiler 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile


# run the customize_compiler 

def test_ext_fullpath(self):
        ext = sysconfig.get_config_var('EXT_SUFFIX')
        # building lxml.etree inplace
        #etree_c = os.path.join(self.tmp_dir, 'lxml.etree.c')
        #etree_ext = Extension('lxml.etree', [etree_c])
        #dist = Distribution({'name': 'lxml', 'ext_modules': [etree_ext]})
        dist = Distribution()
        cmd = self.build_ext(dist)
        cmd.inplace = 1
        cmd.distribution.package_dir = {'': 'src'}
        cmd.distribution.packages = ['lxml', 'lxml.html']
        curdir = os.getcwd()
        wanted = os.path.join(curdir, 'src', 'lxml', 'etree' + ext)
        path = cmd.get_ext_fullpath('lxml.etree')
        self.assertEqual(wanted, path)

        # building lxml.etree not inplace
        cmd.inplace = 0
        cmd.build_lib = os.path.join(curdir, 'tmpdir')
        wanted = os.path.join(curdir, 'tmpdir', 'lxml', 'etree' + ext)
        path = cmd.get_ext_fullpath('lxml.etree')
        self.assertEqual(wanted, path)

        # building twisted.runner.portmap not inplace
        build_py = cmd.get_finalized_command('build_py')
        build_py.package_dir = {}
        cmd.distribution.packages = ['twisted', 'twisted.runner.portmap']
        path = cmd.get_ext_fullpath('twisted.runner.portmap')
        wanted = os.path.join(curdir, 'tmpdir', 'twisted', 'runner',
                              'portmap' + ext)
        self.assertEqual(wanted, path)

        # building twisted.runner.portmap inplace
        cmd.inplace = 1
        path = cmd.get_ext_fullpath('twisted.runner.portmap')
        wanted = os.path.join(curdir, 'twisted', 'runner', 'portmap' + ext)
        self.assertEqual(wanted, path) 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        print(extra_postargs)
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile


# run the customize_compiler 

def configuration(parent_package='', top_path=None):
    from numpy.distutils.misc_util import Configuration

    config = Configuration('randomkit', parent_package, top_path)
    libs = []
    if sys.platform == 'win32':
        libs.append('Advapi32')

    extensions = [Extension('modl.utils.randomkit.random_fast',
                            sources=['modl/utils/randomkit/random_fast.pyx',
                                     'modl/utils/randomkit/randomkit.c',
                                     'modl/utils/randomkit/distributions.c',
                                     ],
                            language="c++",
                            include_dirs=[numpy.get_include(),
                                          'modl/utils/randomkit'],
                            ),
                  Extension('modl.utils.randomkit.sampler',
                            sources=['modl/utils/randomkit/sampler.pyx'],
                            language="c++",
                            include_dirs=[numpy.get_include()]
                            )]
    config.ext_modules += extensions

    config.add_subpackage('tests')

    return config 

def configuration(parent_package='', top_path=None):
    from numpy.distutils.misc_util import Configuration

    config = Configuration('math', parent_package, top_path)

    extensions = [Extension('modl.utils.math.enet',
                            sources=['modl/utils/math/enet.pyx'],
                            include_dirs=[numpy.get_include()],
                            ),
                  ]
    config.ext_modules += extensions

    config.add_subpackage('tests')

    return config 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        print(extra_postargs)
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile

# run the customize_compiler 

def get_extensions():
    '''Get's all .pyx and.pxd files'''

    extensions = []
    packages = get_packages()

    for pkg in packages:
        pkg_folder = pkg.replace('.', '/')
        pyx_files = glob.glob(os.path.join(pkg_folder, '*.pyx'))
        include_dirs = ['prme/myrandom/', numpy.get_include()]
        for pyx in pyx_files:
            pxd = pyx.replace('pyx', 'pxd')
            module = pyx.replace('.pyx', '').replace('/', '.')

            if os.path.exists(pxd):
                ext_files = [pyx, pxd]
            else:
                ext_files = [pyx]
            
            if module == 'prme.myrandom.random':
                ext_files.append(os.path.join(pkg_folder, 'randomkit.c'))
            
            extension = Extension(module, ext_files,
                    include_dirs=include_dirs,
                    extra_compile_args=['-msse', '-msse2', '-mfpmath=sse', \
                            '-fopenmp', '-Wno-unused-function'], #cython warnings supress
                    extra_link_args=['-fopenmp'])

            extensions.append(extension)

    return extensions 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile


# run the customize_compiler 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile


# run the customize_compiler 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        print(extra_postargs)
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile

# run the customize_compiler 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile


# run the customize_compiler 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile


# run the customize_compiler 

def customize_compiler_for_nvcc(self):
    """inject deep into distutils to customize how the dispatch
    to gcc/nvcc works.

    If you subclass UnixCCompiler, it's not trivial to get your subclass
    injected in, and still have the right customizations (i.e.
    distutils.sysconfig.customize_compiler) run on it. So instead of going
    the OO route, I have this. Note, it's kindof like a wierd functional
    subclassing going on."""

    # tell the compiler it can processes .cu
    self.src_extensions.append('.cu')

    # save references to the default compiler_so and _comple methods
    default_compiler_so = self.compiler_so
    super = self._compile

    # now redefine the _compile method. This gets executed for each
    # object but distutils doesn't have the ability to change compilers
    # based on source extension: we add it.
    def _compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
        if os.path.splitext(src)[1] == '.cu':
            # use the cuda for .cu files
            self.set_executable('compiler_so', CUDA['nvcc'])
            # use only a subset of the extra_postargs, which are 1-1 translated
            # from the extra_compile_args in the Extension class
            postargs = extra_postargs['nvcc']
        else:
            postargs = extra_postargs['gcc']

        super(obj, src, ext, cc_args, postargs, pp_opts)
        # reset the default compiler_so, which we might have changed for cuda
        self.compiler_so = default_compiler_so

    # inject our redefined _compile method into the class
    self._compile = _compile


# run the customize_compiler