File libxml++-4.0.1-mingw-build-fixes.patch of Package mingw64-libxml++

--- a/libxml++/exceptions/exception.h	2022-03-21 21:07:22.783526806 +0000
+++ b/libxml++/exceptions/exception.h	2022-03-21 21:07:43.175513821 +0000
@@ -36,17 +36,16 @@
 
 /** Base class for all xmlpp exceptions.
  */
-class exception : public std::exception
+class LIBXMLPP_API exception : public std::exception
 {
 public:
-  LIBXMLPP_API
   explicit exception(const Glib::ustring& message);
-  LIBXMLPP_API ~exception() noexcept override;
+  ~exception() noexcept override;
 
-  LIBXMLPP_API const char* what() const noexcept override;
+  const char* what() const noexcept override;
 
-  LIBXMLPP_API virtual void raise() const;
-  LIBXMLPP_API virtual exception* clone() const;
+  virtual void raise() const;
+  virtual exception* clone() const;
 
 private:
   Glib::ustring message_;