I would like to speed up the installation phase of this Python C module. setuptools can build the extension with several cores with:
python setup.py build --parallel 8 Now how can I tell pip install to tell setuptools to make a parallel build of the module?
pip install has no --build-option and pip install --install-option or --global-option fails with this error message:
$ python -m pip install --build-option='--parallel 8' . /home/azmeuk/dev/zodb/BTrees/env/lib/python3.8/site-packages/pip/_internal/commands/install.py:244: UserWarning: Disabling all use of wheels due to the use of --build-option / --global-option / --install-option. cmdoptions.check_install_build_global(options) Processing /home/azmeuk/dev/zodb/BTrees Installing build dependencies ... done Getting requirements to build wheel ... done Preparing wheel metadata ... done Collecting zope.interface Using cached zope.interface-5.0.0.tar.gz (214 kB) Collecting persistent>=4.1.0 Using cached persistent-4.6.3.tar.gz (119 kB)Requirement already satisfied: setuptools in ./env/lib/python3.8/site-packages (from zope.interface->BTrees==4.7.1.dev0) (46.0.0) Collecting cffi Using cached cffi-1.14.0.tar.gz (463 kB) Collecting pycparser Using cached pycparser-2.20.tar.gz (161 kB) Skipping wheel build for zope.interface, due to binaries being disabled for it. Skipping wheel build for persistent, due to binaries being disabled for it. Skipping wheel build for cffi, due to binaries being disabled for it. Skipping wheel build for pycparser, due to binaries being disabled for it. Building wheels for collected packages: BTrees Building wheel for BTrees (PEP 517) ... done Created wheel for BTrees: filename=BTrees-4.7.1.dev0-cp38-cp38-linux_x86_64.whl size=3310012 sha256=8d7ede730f4c7eb1a56b71124a1956fc6381f2f42c2e64be82d0fd040785bc74 Stored in directory: /tmp/pip-ephem-wheel-cache-xvmeibjl/wheels/6e/6d/be/8acde01b09d9c1158ca46a22021870cad200ef2325bf167cc8 Successfully built BTrees Installing collected packages: zope.interface, pycparser, cffi, persistent, BTrees Running setup.py install for zope.interface ... error ERROR: Command errored out with exit status 1: command: /home/azmeuk/dev/zodb/BTrees/env/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-n5jo5jsl/zope.interface/setup.py'"'"'; __file__='"'"'/tmp/pip-install-n5jo5jsl/zope.interface/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-byf2qhbs/install-record.txt --single-version-externally-managed --compile --install-headers /home/azmeuk/dev/zodb/BTrees/env/include/site/python3.8/zope.interface '--parallel 8' cwd: /tmp/pip-install-n5jo5jsl/zope.interface/ Complete output (6 lines): usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...] or: setup.py --help [cmd1 cmd2 ...] or: setup.py --help-commands or: setup.py cmd --help error: option --parallel 8 not recognized ---------------------------------------- ERROR: Command errored out with exit status 1: /home/azmeuk/dev/zodb/BTrees/env/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-n5jo5jsl/zope.interface/setup.py'"'"'; __file__='"'"'/tmp/pip-install-n5jo5jsl/zope.interface/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-byf2qhbs/install-record.txt --single-version-externally-managed --compile --install-headers /home/azmeuk/dev/zodb/BTrees/env/include/site/python3.8/zope.interface '--parallel 8' Check the logs for full command output. 
pip install . --global-option="build_ext" --global-option="-j5"