SDL: cmake: Weak link to GameController.framework to handle older OSes

From 2fa35757a99ccec7d48ea0bbe3d57ef0d9ce9266 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <[EMAIL REDACTED]>
Date: Wed, 24 Nov 2021 23:34:45 +0300
Subject: [PATCH] cmake: Weak link to GameController.framework to handle older
 OSes

---
 CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 20a743a907..7b60335f7d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2055,7 +2055,9 @@ elseif(APPLE)
   endif()
   if(SDL_FRAMEWORK_GAMECONTROLLER)
     find_library(GAMECONTROLLER GameController)
-    list(APPEND EXTRA_LIBS ${GAMECONTROLLER})
+    if(GAMECONTROLLER)
+      list(APPEND EXTRA_LDFLAGS "-Wl,-weak_framework,GameController")
+    endif()
   endif()
   if(SDL_FRAMEWORK_METAL)
     if(IOS OR TVOS)