@@ 16,9 16,11 @@ 
       arm_target_interface_type="SWD"
       arm_target_loader_applicable_loaders="Flash"
       arm_target_loader_default_loader="Flash"
-      c_preprocessor_definitions="CTL_TASKING"
+      c_preprocessor_definitions=""
       c_user_include_directories="$(DeviceIncludePath);$(PackagesDir)/CMSIS_4/CMSIS/Include;$(PackagesDir)/libraries/libctl/include;$(PackagesDir)/libraries;$(TargetsDir)/SAM_D/CMSIS/Device/Include;$(PackagesDir)/CMSIS_4/CMSIS/Include"
       debug_register_definition_file="$(DeviceRegisterDefinitionFile)"
+      debug_threads_script="$(PackagesDir)/libraries/libctl/source/threads.js"
+      libctl="Yes"
       linker_memory_map_file="$(DeviceMemoryMapFile)"
       linker_section_placement_file="$(StudioDir)/targets/Cortex_M/flash_placement.xml"
       macros="DeviceIncludePath=$(TargetsDir)/SAM_D/CMSIS/Device/SAMD21/Include;DeviceHeaderFile=$(TargetsDir)/SAM_D/CMSIS/Device/SAMD21/Include/samd21.h;DeviceLoaderFile=$(TargetsDir)/SAM_D/Loader/SAM_D21_Loader.elf;DeviceMemoryMapFile=$(TargetsDir)/SAM_D/XML/ATSAMD21G18A_MemoryMap.xml;DeviceRegisterDefinitionFile=$(TargetsDir)/SAM_D/XML/ATSAMD21G18A_Registers.xml;DeviceSystemFile=$(TargetsDir)/SAM_D/CMSIS/Device/SAMD21/Source/system_samd21.c;DeviceVectorsFile=$(TargetsDir)/SAM_D/Source/ATSAMD21G18A_Vectors.s;DeviceFamily=SAM D;DeviceSubFamily=SAM D21"