Various dummy.cpp centralized in common/dummy.cpp. Build rebaked.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39482 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/dummy.cpp

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+/*
+ * File:        src/common/dummy.cpp
+ * Purpose:     See below
+ * Author:      Julian Smart
+ * Created:     1993
+ * Updated:
+ * Copyright:   (c) 1993, AIAI, University of Edinburgh
+ */
+
+/* A dummy file to include wx.h. If precompiling wx.h,
+ * always start by compiling this and producing the PCH file.
+ * Then subsequent source files use the PCH file.
+ *
+ * If precompiling wx.h for wxWidgets and derived apps,
+ * link dummy.obj with your program.
+ *
+ * This will produce a big PCH file.
+ */
+
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifdef __WXMSW__
+    #include "wx/msw/msvcrt.h"
+#endif
+
+#ifdef __VISAGECPP__
+    char wxDummyChar = 0;
+#endif