Results 3 issues of Jin Ma

I have encountered the need to use BOLT on machines with riscv architecture. Is there any plan to support riscv?

hi, I got an x86 machine and installed Ubuntu 18 to compile the LTO kernel, but I tried all the LTO kernels, and tried compilers gcc 7.3.0, gcc 7.5.0, gcc...

TODO: We should also update the submodule xuantie-gnu-toolchain later. @Cooper-Qu