(In reply to Guillaume GARDET from comment #0) > 2) Add '-moutline-atomics' to the list of ignored flags in LLVM (In reply to Dirk Mueller from comment #1) > It seems like 2) is the only option. Wouldn't be the first time we're doing this so it's fine for me. [1] Another option would be to remove it manually in the affected packages, I think there are few packages that build with Clang. But it's probably not a bad idea to go with 2) either way so that Clang supports our default flags. Silly question: why can this behavior not be achieved with -mtune=armv8.1-a? [1] https://build.opensuse.org/package/view_file/devel:tools:compiler/llvm10/clang-ignore-stack-clash-protector.patch