Paul Eggert <eggert@cs.ucla.edu> schrieb am So., 21. Mai 2017 um 08:07 Uhr:

> On 05/19/2017 02:31 AM, Philipp Stephani wrote:
> > Apparently on some systems mbstate_t is a nested struct, and the compiler
> > warns about missing braces. Note that memset to initialize a mbstate_t is
> > explicitly recommended in the libc manual:
>
> Yes, of course memset works (which is all that the glibc manual really
> says).
> It's just that it's verbose and the verbosity isn't needed.
>
> I guess the problem here is that clang's -Wmissing-braces option generates
> false
> alarms. The Clang folks may fix that someday. In the meantime I installed
> the
> first attached patch, to turn off that option for Clang.
>

This apparently hasn't worked, at least I still get the warning, and
there's no -Wno-missing-braces in WARN_CFLAGS.
For Clang, it'd probably be better to use -Weverything and then disable
individual warnings with -Wno... instead of checking for the existence of
every warning flag. That would make configure runs faster and the command
line shorter.