--- a/src/m/sequent-ptx.h	Mon Aug 13 11:19:22 2007 +0200
+++ b/src/m/sequent-ptx.h	Mon Aug 13 11:20:41 2007 +0200
@@ -26,6 +26,11 @@
 
 #include "intel386.h"
 
+/* Define how to take a char and sign-extend into an int.
+   On machines where char is signed, this is a no-op.  */
+/* CHECK THIS */
+#define SIGN_EXTEND_CHAR(c) (c)
+
 /* Now define a symbol for the cpu type, if your compiler
    does not define it automatically:
    Ones defined so far include vax, m68000, ns16000, pyramid,
@@ -40,6 +45,14 @@
 #define CRT0_DUMMIES dummy1, dummy2, dummy3,
 #endif
 
+/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
+   the 24-bit bit field into an int.  In other words, if bit fields
+   are always unsigned.
+
+   If you use NO_UNION_TYPE, this flag does not matter.  */
+
+#define EXPLICIT_SIGN_EXTEND
+
 /* Data type of load average, as read out of kmem.  */
 
 #define LOAD_AVE_TYPE unsigned long