[Patch] Add C11 uchar/wchar related __STDC_* definitions

[Dmitri Gribenko]

On Sat, May 25, 2013 at 8:47 PM, Ed Schouten <ed at 80386.nl> wrote:
> Hi,
>
> It seems that even though Clang uses UTF-16 and UTF-32 for char*_t
> string literals exclusively, we don't define __STDC_UTF_16__ and
> __STDC_UTF_32__ yet.
>
> Also, on FreeBSD, we have to define __STDC_MB_MIGHT_NEQ_WC__, as
> wchar_t uses the code points of the current locale; not ISO 10646.
> This means that we should not define __STDC_MB_MIGHT_NEQ_WC__ and
> __STDC_ISO_10646__, as one could in theory use a locale that is not a
> superset of ASCII (e.g. CP437).
>
> Patch:
>
> http://80386.nl/pub/clang-c11-uchar.txt

Please add tests.  (Tests for these macros should probably go into
test/Preprocessor/init.c).

Should this be conditional on C11 or C++11?

Dmitri

--
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/