c++/modules: friend void foo<bar>()

23_containers/mdspan/layouts/padded.cc was failing because on load we were
wrongly treating the __get_static_stride friends as equivalent between
layout_left_padded and layout_right_padded.  This happened because we were
wrongly pushing these declarations into namespace scope even though we don't
yet know what template they instantiate.  Fixed by using the same
MK_local_friend mechanism as template friends.

gcc/cp/ChangeLog:

	* decl.cc (grokfndecl): Set DECL_CHAIN of a friend f<>.
	* module.cc (trees_out::get_merge_kind): Give it MK_local_friend.
	(trees_out::decl_container): Its container is the befriender.
	(trees_out::key_mergeable): Expand comment.
	* cp-tree.h (decl_specialization_friend_p): New.
	* friend.cc (do_friend): Use it.
	* pt.cc (tsubst_friend_function): Likewise.

gcc/testsuite/ChangeLog:

	* g++.dg/modules/friend-11_a.C: New test.
	* g++.dg/modules/friend-11_b.C: New test.

0 files changed, 0 insertions, 0 deletions