libstdc++: Ignore -Wignored-qualifiers warning in <variant>

The warning is wrong here, the qualifier serves a purpose and is not
ignored (c.f. PR c++/107492).

libstdc++-v3/ChangeLog:

	* include/std/variant (__variant::_Multi_array::__untag_result):
	Use pragma to suppress warning.

diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant
index c234b54421e497b7920834096e3d00a45afc6e40..ba8492b6985b3b88aac9d247fbc0eb3a4ebd0e29 100644 (file)
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -831,10 +831,13 @@ namespace __variant
        : false_type
        { using element_type = _Tp; };
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wignored-qualifiers"
       template <typename... _Args>
        struct __untag_result<const void(*)(_Args...)>
        : false_type
        { using element_type = void(*)(_Args...); };
+#pragma GCC diagnostic pop
 
       template <typename... _Args>
        struct __untag_result<__variant_cookie(*)(_Args...)>