Make sure Objective C files are built with the same flags as C files. Fixes https://github.com/libsdl-org/SDL/issues/5707
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2ce31ab..8e2832f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3122,3 +3122,6 @@ endif()
if(SDL_TEST)
add_subdirectory(test)
endif()
+
+##### Fix Objective C builds #####
+set(CMAKE_OBJC_FLAGS "${CMAKE_OBJC_FLAGS} ${CMAKE_C_FLAGS}")