if (TARGET tinyusb_device_unmarked) add_library(pico_stdio_usb INTERFACE) target_include_directories(pico_stdio_usb INTERFACE ${CMAKE_CURRENT_LIST_DIR}/include) target_sources(pico_stdio_usb INTERFACE ${CMAKE_CURRENT_LIST_DIR}/stdio_usb.c ${CMAKE_CURRENT_LIST_DIR}/stdio_usb_descriptors.c ) target_link_libraries(pico_stdio_usb INTERFACE tinyusb_device_unmarked pico_stdio pico_time ) target_compile_definitions(pico_stdio_usb INTERFACE PICO_STDIO_USB=1 ) endif()