Messages in this thread | | | Date | Mon, 13 Sep 2021 16:02:46 -0300 | From | Jason Gunthorpe <> | Subject | Re: drivers/infiniband/hw/qib/qib_sysfs.c:413:1: error: static_assert expression is not an integral constant expression |
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On Mon, Sep 13, 2021 at 11:53:25AM -0700, Nathan Chancellor wrote: > On Mon, Sep 13, 2021 at 03:38:13PM -0300, Jason Gunthorpe wrote: > > On Mon, Sep 13, 2021 at 10:00:02AM -0700, Nick Desaulniers wrote: > > > > > > This macro would like to know that the passed in member name has a u64 > > > > type, all the things I've come up with fail on clang - but many work > > > > fine on gcc. Frankly I think this case is a clang bug myself.. > > > > > > Perhaps, though this assertion looks a bit like offsetof() to me. I > > > wonder if that can help here? > > > > The assertion would logically like to be this: > > > > static_assert(typecheck(((struct qib_port *)0)->N, u64)) > > This works for me with both GCC and clang, if that is acceptable to you? > It fails if you change one of the variables to 'u32'.
Yes, thanks. Can't say I've even heard of __same_type before :\ would be nice if this was in typecheck.h along with the other variations of the same idea. Presumably it is a little bit different from those somehow?
Jason
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