Make old compilers not choke -- define the attribute in the func prototype.
diff --git a/mkfs_minix.c b/mkfs_minix.c
index a2b6d8a..9b40faa 100644
--- a/mkfs_minix.c
+++ b/mkfs_minix.c
@@ -255,7 +255,9 @@
 #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1))
 #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1))
 
-static __attribute__ ((noreturn)) void show_usage()
+static void show_usage() __attribute__ ((noreturn)); 
+
+static void show_usage()
 {
 	usage(mkfs_minix_usage);
 }