wxOS2 with Open Watcom: correct PCH usage, missing headers, warning fixes, source cleaning and other Watcom adjustements.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34905 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/expat/lib/os2config.h

@@ -0,0 +1,26 @@
+/*================================================================
+** Copyright 2000, Clark Cooper
+** All rights reserved.
+**
+** This is free software. You are permitted to copy, distribute, or modify
+** it under the terms of the MIT/X license (contained in the COPYING file
+** with this distribution.)
+*/
+
+#ifndef OS2CONFIG_H
+#define OS2CONFIG_H
+
+#include <memory.h>
+#include <string.h>
+
+#define XML_NS 1
+#define XML_DTD 1
+#define XML_CONTEXT_BYTES 1024
+
+/* we will assume all OS2 platforms are little endian */
+#define BYTEORDER 1234
+
+/* OS2 has memmove() available. */
+#define HAVE_MEMMOVE
+
+#endif /* ndef OS2CONFIG_H */

src/expat/lib/xmlparse.c

@@ -10,6 +10,11 @@
 #include "winconfig.h"
 #include "expat.h"
 
+#elif defined(OS2_32)
+
+#include "os2config.h"
+#include "expat.h"
+
 #elif defined(MACOS_CLASSIC)
 
 #include "macconfig.h"

src/expat/lib/xmlrole.c

@@ -4,6 +4,8 @@
 
 #ifdef COMPILED_FROM_DSP
 #include "winconfig.h"
+#elif defined(OS2_32)
+#include "os2config.h"
 #elif defined(MACOS_CLASSIC)
 #include "macconfig.h"
 #else

src/expat/lib/xmltok.c

@@ -4,6 +4,8 @@
 
 #ifdef COMPILED_FROM_DSP
 #include "winconfig.h"
+#elif defined(OS2_32)
+#include "os2config.h"
 #elif defined(MACOS_CLASSIC)
 #include "macconfig.h"
 #else