Hey, It looks like it's not possible to build Linux 4.19.43 (latest LTS as of today) with GCC 9.1 (latest stable GCC). From what I see, some support for GCC 9 was added by Miguel (cc'd) in 4.20, but it was never backported into 4.19. Should this happen or is 4.19 stuck on GCC 8? I've tried doing this manually first, but it seems beyond a quick fix with a few backports for me: 1. Disable perf (breaks on -Werror=stringop-truncation) 2. Apply https://lore.kernel.org/patchwork/patch/1005478/ 3. Try applying https://lore.kernel.org/patchwork/cover/1040185/ and discover a missing file 4. Discover that more things changed: https://github.com/torvalds/linux/commits/master/include/linux/compiler_attributes.h
