Add wx headers and ext

wxheaders/wx/except.h

@@ -0,0 +1,40 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/except.h
+// Purpose:     C++ exception related stuff
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     17.09.2003
+// Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_EXCEPT_H_
+#define _WX_EXCEPT_H_
+
+#include "wx/defs.h"
+
+// ----------------------------------------------------------------------------
+// macros working whether wxUSE_EXCEPTIONS is 0 or 1
+// ----------------------------------------------------------------------------
+
+// even if the library itself was compiled with exceptions support, the user
+// code using it might be compiling with a compiler switch disabling them in
+// which cases we shouldn't use try/catch in the headers -- this results in
+// compilation errors in e.g. wx/scopeguard.h with at least g++ 4
+#if !wxUSE_EXCEPTIONS || \
+        (defined(__GNUG__) && !defined(__EXCEPTIONS))
+    #ifndef wxNO_EXCEPTIONS
+        #define wxNO_EXCEPTIONS
+    #endif
+#endif
+
+#ifdef wxNO_EXCEPTIONS
+    #define wxTRY
+    #define wxCATCH_ALL(code)
+#else // do use exceptions
+    #define wxTRY try
+    #define wxCATCH_ALL(code) catch ( ... ) { code }
+#endif // wxNO_EXCEPTIONS/!wxNO_EXCEPTIONS
+
+#endif // _WX_EXCEPT_H_
+