enable parallel build

cuda_core/setup.py

@@ -2,8 +2,11 @@
 #
 # SPDX-License-Identifier: LicenseRef-NVIDIA-SOFTWARE-LICENSE
 
+import os
+
 from Cython.Build import cythonize
 from setuptools import setup, Extension, find_packages
+from setuptools.command.build_ext import build_ext as _build_ext
 
 
 ext_modules = (
@@ -25,6 +28,13 @@
 )
 
 
+class build_ext(_build_ext):
+
+    def build_extensions(self):
+        self.parallel = os.cpu_count() // 2
+        super().build_extensions()
+
+
 setup(
     ext_modules=cythonize(ext_modules,
         verbose=True, language_level=3,
@@ -34,5 +44,6 @@
         find_packages(include=["cuda.core.*"]),
         ["*.pxd", "*.pyx", "*.py"],
     ),
+    cmdclass = {'build_ext': build_ext,},
     zip_safe=False,
 )