[fix] directly use USAN_CHECKS_LIST without string concat in CMakeLists.txt

      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fsanitize=address")

    elseif("${CLANG}" MATCHES "3" OR "${CLANG}" MATCHES "usan")

      # NOTE: keep in sync with list in Makefile

      set(USAN_CHECKS_ENABLE

      set(USAN_CHECKS_LIST

        undefined # Default checks

        # Extra checks

        float-divide-by-zero

        implicit-conversion

        local-bounds

      )

      list(JOIN USAN_CHECKS_ENABLE "," USAN_CHECKS_ENABLE)

      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=${USAN_CHECKS_ENABLE} -fsanitize-recover=${USAN_CHECKS_ENABLE}")

      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fsanitize=${USAN_CHECKS_ENABLE} -fsanitize-recover=${USAN_CHECKS_ENABLE}")

      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=${USAN_CHECKS_LIST} -fsanitize-recover=${USAN_CHECKS_LIST}")

      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fsanitize=${USAN_CHECKS_LIST} -fsanitize-recover=${USAN_CHECKS_LIST}")

    else()

      message(FATAL_ERROR "Unknown CLANG setting: ${CLANG}")

    endif()