--- gcc/config/m68k/hp3bsd44.h	2018/04/24 18:10:24	1.1
+++ gcc/config/m68k/hp3bsd44.h	2018/04/24 18:14:36	1.1.1.2
@@ -12,7 +12,7 @@
 
 /* Names to predefine in the preprocessor for this target machine.  */
 
-#define CPP_PREDEFINES "-Dmc68000 -Dmc68020 -Dhp300 -Dhp9000 -Dunix -D__BSD_4_4__"
+#define CPP_PREDEFINES "-Dmc68000 -Dmc68020 -Dhp300 -Dhp9000 -Dunix -D__BSD_4_4__ -Asystem(unix)  -Asystem(bsd) -Acpu(m68k) -Amachine(m68k)"
 
 /* No more libg.a */