File 4741-stdlib-Add-callback-attributes-to-sys.patch of Package erlang

From f57734dd0b293603ca6573c466174f793e367f9f Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang.org>
Date: Wed, 27 Sep 2023 14:04:20 +0200
Subject: [PATCH 01/10] stdlib: Add callback attributes to sys

---
 lib/stdlib/src/gen_event.erl  |  2 ++
 lib/stdlib/src/gen_server.erl |  2 ++
 lib/stdlib/src/gen_statem.erl |  2 ++
 lib/stdlib/src/peer.erl       |  2 ++
 lib/stdlib/src/sys.erl        | 27 +++++++++++++++++++++++++++
 5 files changed, 35 insertions(+)

diff --git a/lib/stdlib/src/sys.erl b/lib/stdlib/src/sys.erl
index abd025b7f7..95d3d292c1 100644
--- a/lib/stdlib/src/sys.erl
+++ b/lib/stdlib/src/sys.erl
@@ -90,6 +90,33 @@
          {Func :: dbg_fun(), FuncState :: term()}
          | {FuncId :: term(), Func :: dbg_fun(), FuncState :: term()}}.
 
+%%-----------------------------------------------------------------
+%% Callbacks
+%%-----------------------------------------------------------------
+
+-callback system_code_change(Misc, Module, OldVsn, Extra) -> {ok, NMisc} when
+      Misc :: term(),
+      OldVsn :: undefined | term(),
+      Module :: atom(),
+      Extra :: term(),
+      NMisc :: term().
+-callback system_continue(Parent, Debug, Misc) -> no_return() when
+      Parent :: pid(),
+      Debug :: [dbg_opt()],
+      Misc :: term().
+-callback system_get_state(Misc) -> {ok, State} when
+      Misc :: term(), State :: term().
+-callback system_replace_state(StateFun, Misc) -> {ok, NState, NMisc} when
+      Misc :: term(),
+      NState :: term(),
+      NMisc :: term(),
+      StateFun :: fun((State :: term()) -> NState).
+-callback system_terminate(Reason, Parent, Debug, Misc) -> no_return() when
+      Reason :: term(),
+      Parent :: pid(),
+      Debug :: [dbg_opt()],
+      Misc :: term().
+
 %%-----------------------------------------------------------------
 %% System messages
 %%-----------------------------------------------------------------
-- 
2.35.3