[Richard-CRT]

Fixes #3286

Title, causing static libraries that link PRIVATE headers using the _headers suffixes e.g.

target_link_libraries(static_library_target PRIVATE
    pico_stdlib_headers
    pico_aon_timer_headers
    pico_rand_headers
    pico_low_power_headers
    pico_flash_headers
    pico_double_headers
    hardware_spi_headers
    hardware_powman_headers
    hardware_sync_headers
    hardware_watchdog_headers
    hardware_flash_headers
    hardware_adc_headers
)

To cause fatal error: pico/low_power.h: No such file or directory .

Problem:

target_include_directories(pico_low_power INTERFACE ${CMAKE_CURRENT_LIST_DIR}/include)

Compare to below examples:

pico_rand
target_include_directories(pico_rand_headers SYSTEM INTERFACE ${CMAKE_CURRENT_LIST_DIR}/include)

pico_flash
target_include_directories(pico_flash_headers SYSTEM INTERFACE ${CMAKE_CURRENT_LIST_DIR}/include)

Solution:

Add _headers on line 7 of src/rp2_common/pico_low_power/CMakeLists.txt to result in

target_include_directories(pico_low_power_headers INTERFACE ${CMAKE_CURRENT_LIST_DIR}/include)

[will-v-pi]

Thanks, LGTM