From 6afa88f9ebcaf1e73e30a0a030723a52a41bf324 Mon Sep 17 00:00:00 2001
From: Thomas Goyne <tg@realm.io>
Date: Wed, 8 Nov 2023 18:53:09 -0800
Subject: [PATCH] Explicitly instantiate Set<ObjKey> in set.cpp

`Set<ObjKey>` is the single type not implicitly instantiated in
`Obj::get_setbase_ptr()`, so it needs to be explicitly instantiated.
---
 CHANGELOG.md      | 1 +
 src/realm/set.cpp | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 888b15012d4..0b59b4211b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 * <How do the end-user experience this issue? what was the impact?> ([#????](https://github.com/realm/realm-core/issues/????), since v?.?.?)
 * A crash at a very specific time during a DiscardLocal client reset on a FLX Realm could leave subscriptions in an invalid state ([#7110](https://github.com/realm/realm-core/pull/7110), since v12.3.0).
 * Fixed an error "Invalid schema change (UPLOAD): cannot process AddColumn instruction for non-existent table" when using automatic client reset with recovery in dev mode to recover schema changes made locally while offline. ([#7042](https://github.com/realm/realm-core/pull/7042) since the server introduced the feature that allows client to redefine the server's schema if the server is in dev mode - fall 2023)
+* Fix missing symbol linker error for `Set<ObjKey>` when building with Clang and LTO enabled ([#7121](https://github.com/realm/realm-core/pull/7121), since v12.23.3).
 
 ### Breaking changes
 * None.
diff --git a/src/realm/set.cpp b/src/realm/set.cpp
index d208de64096..20689dfc1f4 100644
--- a/src/realm/set.cpp
+++ b/src/realm/set.cpp
@@ -404,6 +404,8 @@ void Set<ObjKey>::do_clear()
     m_tree->set_context_flag(false);
 }
 
+template class Set<ObjKey>;
+
 template <>
 void Set<ObjLink>::do_insert(size_t ndx, ObjLink target_link)
 {