On Thu, Jan 14, 2021 at 06:20:15PM +0900, Masahiro Yamada wrote: > BTW, when I tried ICC a few years ago, > I could not build the kernel with it. Looking at the history behind include/linux/compiler-intel.h, the last time I see a change that actually references building a kernel with icc was 503cf95c061a ("x86, build, icc: Remove uninitialized_var() from compiler-intel.h"), all the way back in 2013. Since then, there do not appear to be any meaningful changes; every change is basically doing something for clang or gcc and not wanting to leave icc behind. It might be worth considering tearing it out. Cheers, Nathan