Updated setup script

setup.py

@@ -1,25 +1,18 @@
 # -*- encoding: utf-8 -*-
 
-import os
-import platform
 import re
-import shutil
-import tempfile
 from glob import glob
 from itertools import chain
 from pathlib import Path
 
-import numpy
-from setuptools import Extension, find_packages, setup
-from setuptools.command.build_ext import build_ext
-from distutils.errors import CompileError, LinkError
+from setuptools import find_packages, setup
 
 PACKAGE_NAME = "crystals"
 DESCRIPTION = "Data structures for crystallography"
 URL = "http://crystals.readthedocs.io"
 DOWNLOAD_URL = "http://github.com/LaurentRDC/crystals"
 AUTHOR = "Laurent P. René de Cotret"
-AUTHOR_EMAIL = "laurent.[email protected]"
+AUTHOR_EMAIL = "laurent.[email protected]"
 
 CIF_FILES = chain.from_iterable([glob("crystals\\cifs\\*.cif")])
 
@@ -40,64 +33,6 @@
     REQUIREMENTS = [line for line in f.read().split("\n") if len(line.strip())]
 
 
-# Support for openmp
-# This idea is from scikit-image:
-# https://github.com/scikit-image/scikit-image/
-class BuildExtWithOpenMP(build_ext):
-    """
-    Try to compile extensions with OpenMP if possible
-    """
-
-    def can_compile_link(self, compile_flags, link_flags):
-        cc = self.compiler
-        fname = "test.c"
-        cwd = os.getcwd()
-        tmpdir = tempfile.mkdtemp()
-
-        code = "#include <omp.h>" "int main(int argc, char** argv) { return(0); }"
-
-        if self.compiler.compiler_type == "msvc":
-            # make sure we build a DLL on Windows
-            local_link_flags = link_flags + ["/DLL"]
-        else:
-            local_link_flags = link_flags
-
-        try:
-            os.chdir(tmpdir)
-            with open(fname, "wt") as fobj:
-                fobj.write(code)
-            try:
-                objects = cc.compile([fname], extra_postargs=compile_flags)
-            except CompileError:
-                return False
-            try:
-                # Link shared lib rather then executable to avoid
-                # http://bugs.python.org/issue4431 with MSVC 10+
-                cc.link_shared_lib(objects, "testlib", extra_postargs=local_link_flags)
-            except (LinkError, TypeError):
-                return False
-        finally:
-            os.chdir(cwd)
-            shutil.rmtree(tmpdir)
-        return True
-
-    def build_extensions(self):
-        """Hook into extension building to set compiler flags"""
-        if self.compiler.compiler_type == "msvc":
-            compile_flags = ["/openmp"]
-            link_flags = []
-        else:
-            compile_flags = ["-fopenmp"]
-            link_flags = ["-fopenmp"]
-
-        if self.can_compile_link(compile_flags, link_flags):
-            for ext in self.extensions:
-                ext.extra_compile_args += compile_flags
-                ext.extra_link_args += link_flags
-
-        return super().build_extensions()
-
-
 if __name__ == "__main__":
     setup(
         name=PACKAGE_NAME,
@@ -122,7 +57,6 @@ def build_extensions(self):
         packages=find_packages(),
         data_files=[("crystals\\cifs", CIF_FILES)],
         include_package_data=True,
-        cmdclass=dict(build_ext=BuildExtWithOpenMP),
         zip_safe=False,
         entry_points={"console_scripts": ["crystals = crystals.__main__:main"]},
         # list of possible classifiers: