Issue #8713: Support alternative start methods in multiprocessing on Unix.
See http://hg.python.org/sandbox/sbt#spawn
diff --git a/Lib/multiprocessing/sharedctypes.py b/Lib/multiprocessing/sharedctypes.py
index a358ed4..a97dadf 100644
--- a/Lib/multiprocessing/sharedctypes.py
+++ b/Lib/multiprocessing/sharedctypes.py
@@ -10,8 +10,11 @@
import ctypes
import weakref
-from multiprocessing import heap, RLock
-from multiprocessing.forking import assert_spawning, ForkingPickler
+from . import heap
+
+from .synchronize import RLock
+from .reduction import ForkingPickler
+from .popen import assert_spawning
__all__ = ['RawValue', 'RawArray', 'Value', 'Array', 'copy', 'synchronized']