--- gcc/config/h8300/h8300.h	2018/04/24 18:10:25	1.1.1.1
+++ gcc/config/h8300/h8300.h	2018/04/24 18:15:24	1.1.1.2
@@ -21,7 +21,7 @@ the Free Software Foundation, 675 Mass A
 
 /* Names to predefine in the preprocessor for this target machine.  */
 
-#define CPP_PREDEFINES "-D__H8300__ -D_DOUBLE_IS_32BITS"
+#define CPP_PREDEFINES "-D__H8300__ -D_DOUBLE_IS_32BITS -Acpu(h8300) -Amachine(h8300)"
 
 #define LIB_SPEC "%{mrelax:-relax} %{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} "