diff -ru -x '*.Po' -x '*.Plo' cooledit-3.17.17.orig/editor/_coolpython.c cooledit-3.17.17/editor/_coolpython.c
--- cooledit-3.17.17.orig/editor/_coolpython.c	2008-04-03 10:59:33 +0200
+++ cooledit-3.17.17/editor/_coolpython.c	2008-04-03 11:02:45 +0200
@@ -1,4 +1,15 @@
 
+// on interix, need this before config.h to avoid clashes
+// with wchar.h, which cooledit believes is not there, and therefore
+// defines mbstate_t. Python.h includes it, and thus wchar.h messes up.
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "Python.h"
+#ifdef __cplusplus
+}
+#endif
+
 #include <config.h>
 
 #ifdef HAVE_PYTHON
diff -ru -x '*.Po' -x '*.Plo' cooledit-3.17.17.orig/rxvt/_rxvtlib.h cooledit-3.17.17/rxvt/_rxvtlib.h
--- cooledit-3.17.17.orig/rxvt/_rxvtlib.h	2008-04-03 11:10:02 +0200
+++ cooledit-3.17.17/rxvt/_rxvtlib.h	2008-04-03 09:00:13 +0200
@@ -170,7 +170,7 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <net/if.h>
-#if !defined(__NetBSD__) && !defined(__OpenBSD__)
+#if !defined(__NetBSD__) && !defined(__OpenBSD__) && !defined(__INTERIX)
 #include <net/if_arp.h>
 #endif
 #include "X11/keysymdef.h"