Issue #12098: multiprocessing on Windows now starts child processes
using the same sys.flags as the current process.
Backport from default branch.
diff --git a/Lib/multiprocessing/forking.py b/Lib/multiprocessing/forking.py
index 1597ae8..dc465b4 100644
--- a/Lib/multiprocessing/forking.py
+++ b/Lib/multiprocessing/forking.py
@@ -361,7 +361,8 @@
return [sys.executable, '--multiprocessing-fork']
else:
prog = 'from multiprocessing.forking import main; main()'
- return [_python_exe, '-c', prog, '--multiprocessing-fork']
+ opts = util._args_from_interpreter_flags()
+ return [_python_exe] + opts + ['-c', prog, '--multiprocessing-fork']
def main():