--- gcc/config/i386/sco4dbx.h	2018/04/24 18:10:27	1.1.1.1
+++ gcc/config/i386/sco4dbx.h	2018/04/24 18:30:47	1.1.1.3
@@ -16,7 +16,8 @@ GNU General Public License for more deta
 
 You should have received a copy of the GNU General Public License
 along with GNU CC; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
 
 
 /* Mostly it's like earlier SCO UNIX.  */
@@ -60,7 +61,7 @@ the Free Software Foundation, 675 Mass A
    Specify predefined symbols in preprocessor.  */
 
 #undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-Di386 -Dunix"
+#define CPP_PREDEFINES "-Di386 -Dunix -Asystem(unix) -Asystem(svr3) -Acpu(i386) -Amachine(i386)"
 
 #undef CPP_SPEC
 #define CPP_SPEC \