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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: Is 'extern' necessary?
Date: Mon, 13 Feb 2017 09:52:09 -0800
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BartC <bc@freeuk.com> writes:
[...]
> At least, gcc's stdio.h seems to use them directly:

gcc has no stdio.h

> extern
>    __attribute__((__format__ (gnu_printf, 3, 0))) __MINGW_ATTRIB_NONNULL(3)
>    int __cdecl __mingw_vsnprintf(char * __restrict__ _DstBuf,size_t 
> _MaxCount,const char * __restrict__ _Format,
>                                 va_list _ArgList);

That appears to be provided by MinGW, not gcc.  I have a gcc-based
implementation on my system, and it doesn't include that declaration.

> Lovely code. I assume this is only declaring one function, it's hard to 
> tell! But it's still code abuse IMO.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"