Merge "Return product config variables from board_configuration" am: 4228f8f7

    return (globals, configs[top_pcm_name][1], globals_base)

def _dictionary_difference(a, b):

    result = {}

    for attr, val in a.items():

        if attr not in b or b[attr] != val:

            result[attr] = val

    return result

def _board_configuration(board_config_init, input_variables_init):

    globals = {}

    h = __h_new()

    input_variables_init(globals, h)

    cfg_base = dict(**h[0])

    globals_base = dict(**globals)

    board_config_init(globals, h)

    return (globals, h[1], globals_base)

    return (globals, _dictionary_difference(h[0], cfg_base), globals_base)

def _substitute_inherited(configs, pcm_name, cfg):