Deprecate the strings 'FAST_RUN_NOGC' and 'STABILIZE' as modes.

theano/compile/mode.py

 """WRITEME
 """
-import os, logging
+import os, logging, warnings
 
 import numpy, theano
 from theano import gof
@@ -299,6 +299,8 @@ FAST_RUN = Mode('c|py', 'fast_run')
 FAST_RUN_NOGC = Mode("c|py_nogc", 'fast_run')
 STABILIZE = Mode("c|py", OPT_STABILIZE)
 
+# The strings 'FAST_RUN_NOGC' and 'STABILIZE' are deprecated,
+# the modes in question should be built when needed.
 predefined_modes = {'FAST_COMPILE': FAST_COMPILE,
                     'FAST_RUN': FAST_RUN,
                     'FAST_RUN_NOGC':FAST_RUN_NOGC,
@@ -337,6 +339,17 @@ def get_mode(orig_string):
             from profilemode import ProfileMode,prof_mode_instance_to_print
             ret = eval(string+'(linker=config.linker, optimizer=config.optimizer)')
     elif predefined_modes.has_key(string):
+        # 'FAST_RUN_NOGC' and 'STABILIZE' are deprecated
+        if string == 'FAST_RUN_NOGC':
+            warnings.warn("Using the string 'FAST_RUN_NOGC' as a mode is "
+                    "deprecated, you should use the object "
+                    "Mode(linker='c|py_nogc') instead.",
+                    stacklevel=5)
+        elif string == 'STABILIZE':
+            warnings.warn("Using the string 'STABILIZE' as a mode is "
+                    "deprecated, you should use the object "
+                    "Mode(optimizer='stabilize') instead.",
+                    stacklevel=5)
         ret = predefined_modes[string]
     else:
         raise Exception("No predefined mode exist for string: %s"%string)