fsfw/hal/src/fsfw_hal/linux/gpio/CMakeLists.txt

# This abstraction layer requires the gpiod library. You can install this library
# with "sudo apt-get install -y libgpiod-dev". If you are cross-compiling, you need
# to install the package before syncing the sysroot to your host computer.
find_library(LIB_GPIO gpiod)

if(${LIB_GPIO} MATCHES LIB_GPIO-NOTFOUND)
    message(STATUS "gpiod library not found, not linking against it")
else()
    target_sources(${LIB_FSFW_NAME} PRIVATE
        LinuxLibgpioIF.cpp
    )
    target_link_libraries(${LIB_FSFW_NAME} PRIVATE
        ${LIB_GPIO}
    )
endif()