[PATCH] Always suppress libc-internal declarations for C++ code.

[Mike Frysinger]

On 21 Nov 2016 12:42, Zack Weinberg wrote:
> This flushed out some minor problems: test-skeleton.c uses uintptr_t
> but wasn't including <stdint.h>

seems like this should be installed as obvious by itself

> libio.h tested _GNU_SOURCE instead of __USE_GNU in one place.

makes sense regardless too

a quick grep shows fnmatch.h has a similar error
-mike
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