BuildSystem: Use ccache if found

CMakeLists.txt

@@ -27,6 +27,12 @@ set(BUILD_SHARED_LIBS True)
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+find_program(CCACHE_PROGRAM "ccache")
+if (CCACHE_PROGRAM)
+	set(CMAKE_C_COMPILER_LAUNCHER "${CCACHE_PROGRAM}")
+	set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE_PROGRAM}")
+endif()
+
 # include headers of ${library} to ${target}
 function(banan_include_headers target library)
 	target_include_directories(${target} PUBLIC $<TARGET_PROPERTY:${library},SOURCE_DIR>/include)