To elaborate, there is a critical bug in the GCC 8.3.0 (included in the Zephyr SDK 0.10.3) that causes it to emit incorrect instructions for the ARC targets. (see https://github.com/zephyrproject-rtos

Sure, that was why “riscv32-zephyr-elf-“ toolchain was removed in the SDK 0.11.0 release: https://github.com/zephyrproject-rtos/sdk-ng/commit/5997df8e3dc78184543f05ccbbc425c2d3c2818b Stephanos

Hi, You need to specify the correct ABI type through `-mabi` alongside the `-march` flag. Try `-march=rv64i -mabi=lp64` for instance. Regards, Stephanos

Hi Immo, Thanks for looking into this. For the time being, I believe focusing on the following issues would help in getting these changes upstream-ed: Getting all applicable tests to pass At least, al