external/liborcus: silence -Werror=deprecated-copy (GCC trunk towards GCC 9)

Change-Id: I520b19e2486bf1622206c74649f7105148b7bd87
Reviewed-on: https://gerrit.libreoffice.org/58047
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

external/liborcus/UnpackedTarball_liborcus.mk

@@ -18,6 +18,7 @@ $(eval $(call gb_UnpackedTarball_update_autoconf_configs,liborcus))
 $(eval $(call gb_UnpackedTarball_add_patches,liborcus,\
 	external/liborcus/0001-workaround-a-linking-problem-on-windows.patch \
 	external/liborcus/rpath.patch.0 \
+	external/liborcus/gcc9.patch.0 \
 ))
 
 ifeq ($(OS),WNT)

external/liborcus/gcc9.patch.0

+--- include/orcus/types.hpp
++++ include/orcus/types.hpp
+@@ -7,6 +7,13 @@
+ 
+ #ifndef INCLUDED_ORCUS_TYPES_HPP
+ #define INCLUDED_ORCUS_TYPES_HPP
++
++#ifdef __GNUC__
++#pragma GCC diagnostic push
++#pragma GCC diagnostic ignored "-Wpragmas" // for old GCC
++#pragma GCC diagnostic ignored "-Wunknown-warning-option" // for Clang
++#pragma GCC diagnostic ignored "-Wdeprecated-copy"
++#endif
+ 
+ #include <cstdlib>
+ #include <vector>
+@@ -145,6 +152,10 @@
+ typedef ::std::vector<xml_token_attr_t> xml_attrs_t;
+ 
+ }
++
++#ifdef __GNUC__
++#pragma GCC diagnostic pop
++#endif
+ 
+ #endif
+ /* vim:set shiftwidth=4 softtabstop=4 expandtab: */