> If you manage to compile the kernel with clang, in theory you can even get cross-language LTO. Note, that there is still bunch of unsolved issues [1] in LLVM

> If you manage to compile the kernel with clang, in theory you can even get cross-language LTO. Note, that there is still bunch of unsolved issues [1] in LLVM to allow all building all of Linux kernel. The efforts had stopped for some years but recently gained steam again, though a lot of time was wasted before. [1] https://bugs.llvm.org/show_bug.cgi?id=4068 https://bugs.llvm.org/show_bug.cgi?id=4068