1 files changed, 28 insertions, 0 deletions

diff --git a/bitbake/lib/bb/__init__.py b/bitbake/lib/bb/__init__.py
index bf4c54d829..3c98b835c6 100644
--- a/bitbake/lib/bb/__init__.py
+++ b/bitbake/lib/bb/__init__.py
@@ -37,6 +37,34 @@ class BBHandledException(Exception):
 import os
 import logging
 from collections import namedtuple
+import multiprocessing as mp
+
+# Python 3.14 changes the default multiprocessing context from "fork" to
+# "forkserver". However, bitbake heavily relies on "fork" behavior to
+# efficiently pass data to the child processes. Places that need this should do:
+#   from bb import multiprocessing
+# in place of
+#   import multiprocessing
+
+class MultiprocessingContext(object):
+    """
+    Multiprocessing proxy object that uses the "fork" context for a property if
+    available, otherwise goes to the main multiprocessing module. This allows
+    it to be a drop-in replacement for the multiprocessing module, but use the
+    fork context
+    """
+    def __init__(self):
+        super().__setattr__("_ctx", mp.get_context("fork"))
+
+    def __getattr__(self, name):
+        if hasattr(self._ctx, name):
+            return getattr(self._ctx, name)
+        return getattr(mp, name)
+
+    def __setattr__(self, name, value):
+        raise AttributeError(f"Unable to set attribute {name}")
+
+multiprocessing = MultiprocessingContext()
 
 
 class NullHandler(logging.Handler):