| Needed to prevent a loop while calling cythonize on macOS - or any platform |
| defaulting to the 'spawn' method, as Python 3.8 does on Darwin. |
| |
| https://github.com/cython/cython/pull/3263 |
| From 15ae78bb74a856836dd64828326f4f0812d36520 Mon Sep 17 00:00:00 2001 |
| From: Marcel Bargull <marcel.bargull@udo.edu> |
| Date: Fri, 6 Dec 2019 18:21:19 +0100 |
| Subject: [PATCH] Disable parallel cythonization for "spawn" start method. |
| |
| --- |
| Cython/Build/Dependencies.py | 5 +++++ |
| 1 file changed, 5 insertions(+) |
| |
| diff --git a/Cython/Build/Dependencies.py b/Cython/Build/Dependencies.py |
| index 593e00a6ef..f9b9c15bc5 100644 |
| --- a/Cython/Build/Dependencies.py |
| +++ b/Cython/Build/Dependencies.py |
| @@ -1073,6 +1073,11 @@ def copy_to_build_dir(filepath, root=os.getcwd()): |
| |
| if N <= 1: |
| nthreads = 0 |
| + if nthreads: |
| + import multiprocessing |
| + if multiprocessing.get_start_method() == 'spawn': |
| + print('Disabling parallel cythonization for "spawn" process start method.') |
| + nthreads = 0 |
| if nthreads: |
| import multiprocessing |
| pool = multiprocessing.Pool( |
