On Tue, Jun 02, 2020 at 11:57:15AM -0700, Nick Desaulniers wrote: > On Tue, Jun 2, 2020 at 11:44 AM 'Marco Elver' via Clang Built Linux > <clang-built-li...@googlegroups.com> wrote: > > > > Adds config variable CC_HAS_WORKING_NOSANITIZE, which will be true if we > > have a compiler that does not fail builds due to no_sanitize functions. > > This does not yet mean they work as intended, but for automated > > build-tests, this is the minimum requirement. > > > > For example, we require that __always_inline functions used from > > no_sanitize functions do not generate instrumentation. On GCC <= 7 this > > fails to build entirely, therefore we make the minimum version GCC 8. > > > > For KCSAN this is a non-functional change, however, we should add it in > > case this variable changes in future. > > > > Link: > > https://lkml.kernel.org/r/20200602175859.gc2...@hirez.programming.kicks-ass.net > > Suggested-by: Peter Zijlstra <pet...@infradead.org> > > Signed-off-by: Marco Elver <el...@google.com> > > Is this a problem only for x86? If so, that's quite a jump in minimal > compiler versions for a feature that I don't think is currently > problematic for other architectures? (Based on > https://lore.kernel.org/lkml/20200529171104.gd706...@hirez.programming.kicks-ass.net/ > )
Currently x86 only, but I know other arch maintainers are planning to have a hard look at their code based on our findings.
