1/* { dg-do preprocess } */
2/* { dg-options "-P -dU" } */
3/* { dg-final { scan-file cmdlne-dU-10.i "^\n*C\n+#define B C\n+#define A B\n*$" } } */
4/* This file deliberately has no final newline.  */
5#define A B
6#define B C
7A