-# 4. Source - If specified, this sets the source code filenames. If this
-# is not set, it defaults to be all of the .cpp, .c, .y, and .l files
-# in the current directory. Also, if you want to build files in addition
-# to the local files, you can use the ExtraSource variable
+# 4. SOURCES - If specified, this sets the source code filenames. If this
+# is not set, it defaults to be all of the .cpp, .c, .y, and .l files
+# in the current directory.