SDL: cmake: get_filename_component(EXT) returns extension including leading dot

SDL Commits
1 
From 7d55bbc0da9cb3195232b6bc7eb33dbd482b198c Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Wed, 15 Mar 2023 00:15:32 +0100
Subject: [PATCH] cmake: get_filename_component(EXT) returns extension
 including leading dot

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index add77d3216fb..651a419f6dee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3123,7 +3123,7 @@ endif()
 if(APPLE)
   foreach(SOURCE_FILE ${SOURCE_FILES})
     get_filename_component(FILE_EXTENSION ${SOURCE_FILE} EXT)
-    if(FILE_EXTENSION STREQUAL "m")
+    if(FILE_EXTENSION STREQUAL ".m")
       set_property(SOURCE ${SOURCE_FILE} APPEND_STRING PROPERTY COMPILE_FLAGS " -x objective-c")
     endif()
   endforeach()