diff --git a/Makefile.config b/Makefile.config
index 6018ae6f721..3ae6245e9a5 100644
--- a/Makefile.config
+++ b/Makefile.config
@@ -13,17 +13,15 @@
 #LLVM_OBJ_DIR = .
 LLVM_OBJ_DIR = /localhome/$(shell whoami)
 
-# Path to executable for Burg
-# 
-BURG = $(LEVEL)/utils/Burg/burg
-
-# Path to location for purify
+# Path to location for purify, this is only needed if you build with
+# ENABLE_PURIFY=1
 # 
 PURIFY = /usr/dcs/applications/purify/bin/purify
 
-# Path to location for LLVM front-end
-# 
-LLVMGCCDIR = /home/vadve/lattner/cvs/gcc_install_x86
+# Path to location for LLVM front-end this should only be specified here if you
+# want to override the value set in Makefile.$(uname)
+#
+#LLVMGCCDIR := /home/vadve/lattner/cvs/gcc_install_x86
 
 # Path to the C++ compiler to use.  Under linux, for some reason the compiler
 # driver wants to search the PATH to find the system assembler, which breaks if