--- gcc/config/i386/sun.h	2018/04/24 18:10:27	1.1
+++ gcc/config/i386/sun.h	2018/04/24 18:17:05	1.1.1.2
@@ -43,11 +43,7 @@ the Free Software Foundation, 675 Mass A
 
 /* Specify predefined symbols in preprocessor.  */
 
-#define CPP_PREDEFINES "-Dunix -Di386 -Dsun386 -Dsun"
-
-/* Define size_t for built-in functions.  */
-
-#define SIZE_TYPE "int"
+#define CPP_PREDEFINES "-Dunix -Di386 -Dsun386 -Dsun -Asystem(unix) -Asystem(bsd) -Acpu(i386) -Amachine(i386)"
 
 /* Allow #sccs in preprocessor.  */