Exclude SFML from the All target, and flag as a system library

Author: JonnyPtn

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.28)
 project(CMakeSFMLProject LANGUAGES CXX)
 
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
@@ -8,7 +8,9 @@ include(FetchContent)
 FetchContent_Declare(SFML
     GIT_REPOSITORY https://github.com/SFML/SFML.git
     GIT_TAG 2.6.x
-    GIT_SHALLOW ON)
+    GIT_SHALLOW ON
+    EXCLUDE_FROM_ALL
+    SYSTEM)
 FetchContent_MakeAvailable(SFML)
 
 add_executable(main src/main.cpp)