setup.py

#!/usr/bin/env python

import os
import sys

from setuptools import setup, Command, Extension
# from setuptools.extension import Extension

# NOTE: setuptools build_ext does not work properly with Cython code
from distutils.command.build_ext import build_ext as _build_ext

# Adapted from Cython's new_build_ext
class build_ext(_build_ext):
    def run(self):
        # Check dependencies
        try:
            from Cython.Build.Dependencies import cythonize
        except ImportError as E:
            sys.stderr.write("Error: {0}\n".format(E))
            sys.stderr.write("The installation of pplite requires Cython\n")
            sys.exit(1)

        try:
            # We need the header files for cysignals at compile-time
            import cysignals
        except ImportError as E:
            sys.stderr.write("Error: {0}\n".format(E))
            sys.stderr.write("The installation of pplite requires cysignals\n")
            sys.exit(1)

        try:
            # We need the header files for gmpy2 at compile-time
            import gmpy2
        except ImportError as E:
            sys.stderr.write("Error: {0}\n".format(E))
            sys.stderr.write("The installation of pplite requires gmpy2\n")
            sys.exit(1)

        self.extensions[:] = cythonize(
            self.extensions,
            include_path=sys.path,
            compiler_directives={'embedsignature': True,
                                 'language_level': '3'})

        _build_ext.run(self)

extensions = [
    Extension('pplite.integer_conversions', sources=['pplite/integer_conversions.pyx']),
    Extension('pplite.linear_algebra', sources=['pplite/linear_algebra.pyx']),
    Extension('pplite.constraint', sources=['pplite/constraint.pyx']),
    Extension('pplite.generators', sources=['pplite/generators.pyx']),
    Extension('pplite.intervals', sources=['pplite/intervals.pyx']),
    Extension('pplite.bounding_box', sources=['pplite/bounding_box.pyx']),
    Extension('pplite.polyhedron', sources=['pplite/polyhedron.pyx'])
    ]

setup(
    ext_modules = extensions,
    cmdclass = {'build_ext': build_ext},)