SDL_image: cmake: check -Wl,-undefined,error before use

SDL Commits
1 
From 584414aa5af2737a0d394bd5bf4c9b1499d6e2c9 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Thu, 8 Jan 2026 21:03:03 +0100
Subject: [PATCH] cmake: check -Wl,-undefined,error before use

---
 cmake/PrivateSdlFunctions.cmake | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/cmake/PrivateSdlFunctions.cmake b/cmake/PrivateSdlFunctions.cmake
index 8d71ede0..7c8d343a 100644
--- a/cmake/PrivateSdlFunctions.cmake
+++ b/cmake/PrivateSdlFunctions.cmake
@@ -283,7 +283,10 @@ endfunction()
 function(sdl_target_link_options_no_undefined TARGET)
     if(NOT MSVC AND NOT CMAKE_SYSTEM_NAME MATCHES ".*OpenBSD.*")
         if(CMAKE_C_COMPILER_ID MATCHES "AppleClang")
-            target_link_options(${TARGET} PRIVATE "-Wl,-undefined,error")
+            sdl_check_linker_flag("-Wl,-undefined,error" HAVE_WL_UNDEFINED_ERROR)
+            if(HAVE_WL_UNDEFINED_ERROR)
+                target_link_options(${TARGET} PRIVATE "-Wl,-undefined,error")
+            endif()
         else()
             sdl_check_linker_flag("-Wl,--no-undefined" HAVE_WL_NO_UNDEFINED)
             if(HAVE_WL_NO_UNDEFINED AND NOT ((CMAKE_C_COMPILER_ID MATCHES "Clang") AND WIN32))