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/util.py b/Lib/multiprocessing/util.py
index fe76bcc..3ce480f 100644
--- a/Lib/multiprocessing/util.py
+++ b/Lib/multiprocessing/util.py
@@ -37,6 +37,7 @@
import atexit
import threading # we want threading to install it's
# cleanup function before multiprocessing does
+from subprocess import _args_from_interpreter_flags
from multiprocessing.process import current_process, active_children