Removed another of the tweaks, and added a note in that it is largely untested.

IPython/core/compilerop.py

@@ -43,12 +43,9 b' import time'
 
 # Roughtly equal to PyCF_MASK | PyCF_MASK_OBSOLETE as defined in pythonrun.h,
 # this is used as a bitmask to extract future-related code flags.
-try:
-    PyCF_MASK = functools.reduce(operator.or_,
-                                 (getattr(__future__, fname).compiler_flag
-                                  for fname in __future__.all_feature_names))
-except AttributeError: # IronPython __future__'s are non-standard, 2/8/2014
-    PyCF_MASK = 0
+PyCF_MASK = functools.reduce(operator.or_,
+                             (getattr(__future__, fname).compiler_flag
+                              for fname in __future__.all_feature_names))
 
 #-----------------------------------------------------------------------------
 # Local utilities

IPython/utils/_process_cli.py

@@ -1,11 +1,14 b''
-"""
-cli-specific implementation of process utilities.
+"""cli-specific implementation of process utilities.
 
 cli - Common Language Infrastructure for IronPython. Code
       can run on any operating system. Check os.name for os-
       specific settings.
 
 This file is only meant to be imported by process.py, not by end-users.
+
+This file is largely untested. To become a full drop-in process
+interface for IronPython will probably require you to help fill
+in the details. 
 """
 
 # Import cli libraries: