SPDX-FileCopyrightText: 2025 Samuel Tyler <samuel@samuelt.me>

SPDX-License-Identifier: BSD-3-Clause

In tcc, a variable declared as extern that is assigned to does not work
correctly.

--- oyacc-6.6/defs.h	2025-02-05 14:23:40.883827721 +1100
+++ oyacc-6.6/defs.h	2025-02-05 14:23:43.879827713 +1100
@@ -365,4 +365,4 @@
 
 /* system variables */
 
-extern char *__progname;
+char *__progname;
