diff --git a/Makefile.Linux b/Makefile.Linux
index 2a3e4a6335e..39928d92346 100644
--- a/Makefile.Linux
+++ b/Makefile.Linux
@@ -15,4 +15,9 @@ MakeSharedObjectOption := -shared
 #
 ExportSymbols := -Wl,--export-dynamic
 
-
+# Path to location for LLVM front-end for this architecture.  This setting may
+# be overriden by the Makefile.config option, and should not override it if set.
+#
+ifndef LLVMGCCDIR
+LLVMGCCDIR := /home/vadve/lattner/cvs/gcc_install_x86
+endif
diff --git a/Makefile.SunOS b/Makefile.SunOS
index 9afae8a176c..2b4eeb314a1 100644
--- a/Makefile.SunOS
+++ b/Makefile.SunOS
@@ -15,4 +15,9 @@ MakeSharedObjectOption := -G
 #
 ExportSymbols :=
 
-
+# Path to location for LLVM front-end for this architecture.  This setting may
+# be overriden by the Makefile.config option, and should not override it if set.
+#
+ifndef LLVMGCCDIR
+LLVMGCCDIR := /home/vadve/lattner/cvs/gcc_install
+endif