When compiled for `hifive1` board with `gcc-7.2.0` this warning was raised: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]
When compiled for `hifive1` board with `gcc-7.2.0` this warning was raised: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]