On Fri, Apr 20, 2018 at 7:59 AM Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: > On Fri, Apr 20, 2018 at 10:13 AM, Marc Zyngier <marc.zyngier@xxxxxxx> wrote: > >> The issue is that > >> clang doesn't know about the "S" asm constraint. I reported this to > >> clang [2], and hopefully this will get fixed. In the meantime, would > >> it possible to work around using the "S" constraint in the kernel? > > > > I have no idea, I've never used clang to build the kernel. Clang isn't > > really supported to build the arm64 kernel anyway (as you mention > > below), and working around clang deficiencies would mean that we leave > > with the workaround forever. I'd rather enable clang once it is at > > feature parity with GCC. > The fact that there are some existing issues with building arm64 > kernel with clang doesn't sound like a good justification for adding > new issues :) > However in this case I do believe that this is more of a bug in clang > that should be fixed. Just to follow up with this thread; Support for "S" constraints is being (re-)added to Clang in: https://reviews.llvm.org/D46745 -- Thanks, ~Nick Desaulniers _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
