setup.py

#!/usr/bin/env python3
# encoding: utf-8

from distutils.core import setup, Extension
import sysconfig

EXTRA_COMPILE_ARGS = sysconfig.get_config_var('CFLAGS').split()
EXTRA_COMPILE_ARGS += ["-std=c99"]


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

    # Necessary for the half-float d-type.
    info = get_info('npymath')

    config = Configuration('',
                           parent_package,
                           top_path)
    config.add_extension('mapper_c_utils',
                         ['src/mapper_c_utils/mapper_c_utils.c'],
                         extra_info=info,
                         language='c99',
                         extra_compile_args=EXTRA_COMPILE_ARGS)

    return config


if __name__ == "__main__":
    from numpy.distutils.core import setup
    setup(configuration=configuration)