On Thu, Aug 29, 2019 at 09:59:48AM +0000, David Laight wrote: > From: Nathan Chancellor > > Sent: 28 August 2019 19:45 > ... > > However, I think that -fno-builtin-* would be appropriate here because > > we are providing our own setjmp implementation, meaning clang should not > > be trying to do anything with the builtin implementation like building a > > declaration for it. > > Isn't implementing setjmp impossible unless you tell the compiler that > you function is 'setjmp-like' ? No idea, PowerPC is the only architecture that does such a thing. https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/tree/arch/powerpc/kernel/misc.S#n43 Goes back all the way to before git history (all the way to ppc64's addition actually): https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/?id=61542216fa90397a2e70c46583edf26bc81994df https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/arch/ppc64/xmon/setjmp.c?id=5f12b0bff93831620218e8ed3970903ecb7861ce I would just like this warning fixed given that PowerPC builds with -Werror by default so it is causing a build failure in our CI. Cheers, Nathan
