--- a/src/m/next.h	Mon Aug 13 11:19:22 2007 +0200
+++ b/src/m/next.h	Mon Aug 13 11:20:41 2007 +0200
@@ -26,6 +26,15 @@
 #define NeXT
 #endif
 
+/* Define how to take a char and sign-extend into an int.
+   On machines where char is signed, this is a no-op.  */
+
+#define SIGN_EXTEND_CHAR(c) (c)
+
+/* XINT must explicitly sign-extend */
+
+#define EXPLICIT_SIGN_EXTEND
+
 /* Say that the text segment of a.out includes the header;
    the header actually occupies the first few bytes of the text segment
    and is counted in hdr.a_text.  */