diff -ru a2ps-4.13.old/src/main.c a2ps-4.13/src/main.c

--- a2ps-4.13.old/src/main.c	2006-10-09 13:43:03 +0400

+++ a2ps-4.13/src/main.c	2006-10-09 13:43:28 +0400

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

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

 /*                                                                      */

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

+#define _GNU_SOURCE 1

 #include <assert.h>

 #include <string.h>

 #include <locale.h>

@@ -104,7 +105,6 @@

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

 char *program_name;

-const char *program_invocation_name;

 /* Stores the data of liba2ps.  */