On 06/29/2015 09:41 PM, Bruce Cran wrote:
On 6/29/2015 8:48 PM, Jens Axboe wrote:
Thanks for reporting this, Bruce. No idea why clang complains about
that, it's definitely a constant expression. Anyway, committed this:
http://git.kernel.dk/cgit/fio/commit/?id=94815a5c8366a9290167e8539f29994c2d43d15c
which adds this sort of check to the configure _Static_assert() check.
It seems the relevant text is:
note: cast that performs the conversions of a reinterpret_cast is not
allowed in a constant expression
But it's bogus, it's nothing but static pointer math.
Is there something about our use of offsetof that means we can't depend
on the version from <stddef.h>?
No other reason than having a generic solution is superior to depending
on whatever might be supplied with the given system.
--
Jens Axboe
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