--- a2ps-4.13/src/main.c.gnusource	2003-10-17 17:07:05.000000000 +0100

+++ a2ps-4.13/src/main.c	2003-10-17 17:07:17.000000000 +0100

@@ -30,6 +30,7 @@

 /*                      I n c l u d e   f i l e s                       */

 /*                                                                      */

 /************************************************************************/

+#define _GNU_SOURCE

 #include <assert.h>

 #include <string.h>

 #include <langinfo.h>

@@ -105,7 +106,6 @@

    defined twice, see lib/confg.gperf, handling of `Options:'. */

 char *program_name;

-const char *program_invocation_name;

 /* Stores the data of liba2ps.  */