ALL: Avoid name space collision for the global variable PC when readline is dynamically loaded in many simulators.

Interdata/id_defs.h

@@ -41,6 +41,10 @@
 
 #include "sim_defs.h"                                   /* simulator defns */
 
+/* Rename of global PC variable to avoid namespace conflicts on some platforms */
+
+#define PC PC_Global
+
 #if defined(USE_INT64) || defined(USE_ADDR64)
 #error "Interdata 16/32 does not support 64b values!"
 #endif