--- a/src/m/plexus.h	Mon Aug 13 11:33:40 2007 +0200
+++ b/src/m/plexus.h	Mon Aug 13 11:35:02 2007 +0200
@@ -24,11 +24,6 @@
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2"  */
 
-/* Define WORD_MACHINE if addresses and such have
- * to be corrected before they can be used as byte counts.  */
-
-#undef WORD_MACHINE
-
 /* Now define a symbol for the cpu type, if your compiler
    does not define it automatically:
    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
@@ -36,14 +31,6 @@
 /* Plexus predefines m68 instead of m68000. */
 #define m68000 m68
 
-/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
-   the 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.  */
-
-#undef EXPLICIT_SIGN_EXTEND
-
 /* Data type of load average, as read out of kmem.  */
 
 #undef LOAD_AVE_TYPE
@@ -58,15 +45,6 @@
 
 #undef CANNOT_DUMP
 
-/* Define VIRT_ADDR_VARIES if the virtual addresses of
-   pure and impure space as loaded can vary, and even their
-   relative order cannot be relied on.
-
-   Otherwise Emacs assumes that text space precedes data space,
-   numerically.  */
-
-#undef VIRT_ADDR_VARIES
-
 /* Define C_ALLOCA if this machine does not support a true alloca
    and the one written in C should be used instead.
    Define HAVE_ALLOCA to say that the system provides a properly