--- gcc/config/m68k/ctix.h	2018/04/24 18:10:24	1.1
+++ gcc/config/m68k/ctix.h	2018/04/24 18:14:31	1.1.1.2
@@ -32,7 +32,7 @@ the Free Software Foundation, 675 Mass A
 
 /* Names to predefine in the preprocessor for this target machine.  */
 #undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-Dmc68000 -Dmc68k -Dunix -Dctix"
+#define CPP_PREDEFINES "-Dmc68000 -Dmc68k -Dunix -Dctix -Asystem(unix)  -Acpu(m68k) -Amachine(m68k)"
 
 /* Where to look for robotussinized startfiles.  */
 #undef STANDARD_STARTFILE_PREFIX