===================================================================
RCS file: /cvs/mandoc/test-progname.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -p -r1.1 -r1.2
--- mandoc/test-progname.c	2015/10/11 21:12:55	1.1
+++ mandoc/test-progname.c	2015/11/06 16:30:33	1.2
@@ -1,9 +1,10 @@
-#include <string.h>
+#include <stdlib.h>
 
-extern char *__progname;
-
 int
 main(void)
 {
-	return !!strcmp(__progname, "test-progname");
+	const char * progname;
+
+	progname = getprogname();
+	return progname == NULL;
 }