message: setup.py run build on all cores if not specified otherwise
diff: import os
  from setuptools import find_packages
  +import multiprocessing
  +try:
  from skbuild import setup
  +except ImportError:
  + raise ImportError("Missing scikit-build, (should be automatically installed by pip)")
  import sys
  +has_core_count_spec = False
  +for a in sys.argv:
  + if a.startswith("-j"):
  + has_core_count_spec = True
  + break
  +if not has_core_count_spec:
  + sys.argv.append("-j%d" % multiprocessing.cpu_count())
  +
  +
  this_directory = os.path.abspath(os.path.dirname(__file__))
  with open(os.path.join(this_directory, "README.md")) as f:
  long_description = f.read()
  