[committed] libstdc++: Add missing export for std::is_layout_compatible_v [PR120159]

[Jonathan Wakely]

libstdc++-v3/ChangeLog:

        PR libstdc++/120159
        * src/c++23/std.cc.in (is_layout_compatible_v): Export.
---

Tested x86_64-linux. Pushed to trunk and gcc-15.

 libstdc++-v3/src/c++23/std.cc.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libstdc++-v3/src/c++23/std.cc.in b/libstdc++-v3/src/c++23/std.cc.in
index 73316d168c94..d45ae632ace3 100644
--- a/libstdc++-v3/src/c++23/std.cc.in
+++ b/libstdc++-v3/src/c++23/std.cc.in
@@ -3114,6 +3114,7 @@ export namespace std
 #if __cpp_lib_is_layout_compatible
   using std::is_corresponding_member;
   using std::is_layout_compatible;
+  using std::is_layout_compatible_v;
 #endif
 #if __cpp_lib_is_pointer_interconvertible
   using std::is_pointer_interconvertible_base_of;
-- 
2.49.0