Merge tag 'upstream/2.5.0'

Upstream version 2.5.0

1 files changed, 11 insertions, 4 deletions

diff --git a/engine/SCons/Debug.py b/engine/SCons/Debug.py
index 22d09ab..2ba97cd 100644
--- a/engine/SCons/Debug.py
+++ b/engine/SCons/Debug.py
@@ -1,12 +1,15 @@
 """SCons.Debug
 
 Code for debugging SCons internal things.  Shouldn't be
-needed by most users.
+needed by most users. Quick shortcuts:
+
+from SCons.Debug import caller_trace
+caller_trace()
 
 """
 
 #
-# Copyright (c) 2001 - 2015 The SCons Foundation
+# Copyright (c) 2001 - 2016 The SCons Foundation
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -28,7 +31,7 @@ needed by most users.
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #
 
-__revision__ = "src/engine/SCons/Debug.py rel_2.4.1:3453:73fefd3ea0b0 2015/11/09 03:25:05 bdbaddog"
+__revision__ = "src/engine/SCons/Debug.py rel_2.5.0:3543:937e55cd78f7 2016/04/09 11:29:54 bdbaddog"
 
 import os
 import sys
@@ -137,8 +140,12 @@ def caller_stack():
 caller_bases = {}
 caller_dicts = {}
 
-# trace a caller's stack
 def caller_trace(back=0):
+    """
+    Trace caller stack and save info into global dicts, which
+    are printed automatically at the end of SCons execution.
+    """
+    global caller_bases, caller_dicts
     import traceback
     tb = traceback.extract_stack(limit=3+back)
     tb.reverse()