How do I compile a target for risc-v

[LWBobo]

I want to see the compilation process of setvl for the rvv extension, so I want to specify target as risc-v at compile time, how do I set what compilation parameters? I tried a few things, but I got an error at compile time.

[kito-cheng]

Could you give few more detail like what's your compilation option and your program?