linked against OS

CMakeLists.txt

@@ -27,6 +27,7 @@ elseif(${OS_FSFW} STREQUAL linux)
 	set(OS_FSFW_NAME "Linux")
 elseif(${OS_FSFW} STREQUAL  freertos)
 	set(OS_FSFW_NAME "FreeRTOS")
+	target_link_libraries(${LIB_FSFW_NAME} ${LIB_OS_NAME})
 elseif(${OS_FSFW} STREQUAL rtems)
 	set(OS_FSFW_NAME "RTEMS")
 else()