Hi there~
It is related with kendryte-gnu-toolchain. Our software team posted the issues to kendryte team on github. After they solving the issue, it shall support on raspberry pi. thanks.
<LINK_TEXT text=“https://github.com/kendryte/kendryte-gn … n/issues/6”>https://github.com/kendryte/kendryte-gnu-toolchain/issues/6</LINK_TEXT>