[PATCH][BZ 17979][BZ 17721] Fix issues with sys/cdefs.h and uchar.h when using non-gcc compiler.

[Joseph Myers]

On Thu, 28 Jan 2016, Dwight Guth wrote:

> Yes, that's reasonable. What would you see as the correct resolution
> to the issue?

I think defining to restrict based on __STDC_VERSION__ is reasonable 
(outside of the release freeze period).

uchar.h is trickier in that stdint.h is theoretically system-specific 
(it's in sysdeps), so there's an abstraction violation in copying its 
types into uchar.h (not in sysdeps).  I'd be happy for stdint.h and 
inttypes.h to move out of sysdeps, but any hardcoding should probably 
still be accompanied at least by a comment in stdint.h about where else 
the type information is embedded.

-- 
Joseph S. Myers
joseph@codesourcery.com