src/rp2_common/pico_stdlib/CMakeLists.txt

# PICO_CMAKE_CONFIG: PICO_STDIO_UART, OPTION: Globally enable stdio UART, default=1, group=pico_stdlib
option(PICO_STDIO_UART "Globally enable stdio UART" 1)
# PICO_CMAKE_CONFIG: PICO_STDIO_USB, OPTION: Globally enable stdio USB, default=0, group=pico_stdlib
option(PICO_STDIO_USB "Globally enable stdio USB" 0)
# PICO_CMAKE_CONFIG: PICO_STDIO_SEMIHOSTING, OPTION: Globally enable stdio semihosting, default=0, group=pico_stdlib
option(PICO_STDIO_SEMIHOSTING "Globally enable stdio semi-hosting" 0)

if (NOT TARGET pico_stdlib)
    pico_add_impl_library(pico_stdlib)
    target_sources(pico_stdlib INTERFACE
            ${CMAKE_CURRENT_LIST_DIR}/stdlib.c
    )
    pico_mirrored_target_link_libraries(pico_stdlib INTERFACE
            hardware_gpio
            hardware_uart
            hardware_divider
            pico_time
            pico_util
            pico_platform
            pico_runtime
            pico_stdio
    )

    function(pico_enable_stdio_uart TARGET ENABLED)
        set_target_properties(${TARGET} PROPERTIES PICO_TARGET_STDIO_UART ${ENABLED})
    endfunction()

    function(pico_enable_stdio_usb TARGET ENABLED)
        set_target_properties(${TARGET} PROPERTIES PICO_TARGET_STDIO_USB ${ENABLED})
    endfunction()

    function(pico_enable_stdio_semihosting TARGET ENABLED)
        set_target_properties(${TARGET} PROPERTIES PICO_TARGET_STDIO_SEMIHOSTING ${ENABLED})
    endfunction()

    if (TARGET pico_stdio_uart)
        target_link_libraries(pico_stdlib INTERFACE $<IF:$<BOOL:$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_STDIO_UART>,>,${PICO_STDIO_UART},$<TARGET_PROPERTY:PICO_TARGET_STDIO_UART>>>,pico_stdio_uart,>)
        target_link_libraries(pico_stdlib_headers INTERFACE $<IF:$<BOOL:$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_STDIO_UART>,>,${PICO_STDIO_UART},$<TARGET_PROPERTY:PICO_TARGET_STDIO_UART>>>,pico_stdio_uart_headers,>)
    endif()

    if (TARGET pico_stdio_usb)
        target_link_libraries(pico_stdlib INTERFACE $<IF:$<BOOL:$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_STDIO_USB>,>,${PICO_STDIO_USB},$<TARGET_PROPERTY:PICO_TARGET_STDIO_USB>>>,pico_stdio_usb,>)
        target_link_libraries(pico_stdlib_headers INTERFACE $<IF:$<BOOL:$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_STDIO_USB>,>,${PICO_STDIO_USB},$<TARGET_PROPERTY:PICO_TARGET_STDIO_USB>>>,pico_stdio_usb_headers,>)
    endif()

    if (TARGET pico_stdio_semihosting)
        target_link_libraries(pico_stdlib INTERFACE $<IF:$<BOOL:$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_STDIO_SEMIHOSTING>,>,${PICO_STDIO_SEMIHOSTING},$<TARGET_PROPERTY:PICO_TARGET_STDIO_SEMIHOSTING>>>,pico_stdio_semihosting,>)
        target_link_libraries(pico_stdlib_headers INTERFACE $<IF:$<BOOL:$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_STDIO_SEMIHOSTING>,>,${PICO_STDIO_SEMIHOSTING},$<TARGET_PROPERTY:PICO_TARGET_STDIO_SEMIHOSTING>>>,pico_stdio_semihosting_headers,>)
    endif()

endif()