On Mon, Nov 2, 2020 at 8:55 PM Jarkko Sakkinen <jar...@kernel.org> wrote: > > On Wed, Sep 02, 2020 at 03:59:05PM -0700, Nick Desaulniers wrote: > > +#define CLANG_VERSION (__clang_major__ * 10000 \ > > + + __clang_minor__ * 100 \ > > + + __clang_patchlevel__) > > + > > +#if CLANG_VERSION < 100001 > > +# error Sorry, your version of Clang is too old - please use 10.0.1 or > > newer. > > +#endif > > > I'm trying to compile a BPF enabled test kernel for a live system and I > get this error even though I have much newer clang: > > ➜ ~ (master) ✔ clang --version > Ubuntu clang version 11.0.0-2 > Target: x86_64-pc-linux-gnu > Thread model: posix > InstalledDir: /usr/bin > > Tried to Google for troubleshooter tips but this patch is basically the > only hit I get :-)
To check the values of the above preprocessor defines, please run: $ clang -dM -E - < /dev/null | grep -e __clang_m -e __clang_p If you have multiple versions of clang installed, you might not be running the version you think you are. Particularly, if you're using bcc, idk if it includes a copy of clang? If that's the case, we may have to work out how we can support older versions of clang for the express purposes of bpf. -- Thanks, ~Nick Desaulniers
