function(add_sources FILE_LIST FILES_PATH)
    file(GLOB_RECURSE ADD_FILES_LIST ${FILES_PATH})
    list(APPEND ${FILE_LIST} ${ADD_FILES_LIST})
    set(${FILE_LIST} ${${FILE_LIST}} PARENT_SCOPE)
endfunction()

include_directories("APP/")

add_sources(SOURCES "APP/ert_main.c")
add_sources(SOURCES "APP/*.c")