def do_clean(d):
    """clear the build and temp directories"""
    dir = d.expand("${WORKDIR}")
    bb.note("Removing " + dir)
    oe.path.remove(dir)

    dir = "%s.*" % d.getVar('STAMP')
    bb.note("Removing " + dir)
    oe.path.remove(dir)

    for f in (d.getVar('CLEANFUNCS') or '').split():
        bb.build.exec_func(f, d)

do_clean(d)