Index: gen-make.py
===================================================================
--- gen-make.py	(revision 1514179)
+++ gen-make.py	(working copy)
@@ -278,6 +278,9 @@ if __name__ == '__main__':
   except getopt.GetoptError, e:
     _usage_exit(str(e))
 
+  if args and args[0] == '\n':
+    _usage_exit("argument must not be end-of-line.")
+
   conf = 'build.conf'
   skip = 0
   gentype = 'make'