[PATCH] argp: Do not override GCC keywords with macros [BZ #16907]

[Florian Weimer]

On 08/15/2016 09:06 AM, Paul Eggert wrote:
> Florian Weimer wrote:
>
>> #ifndef _GL_INLINE_HEADER_BEGIN
>>  #error "Please include config.h first."
>> #endif
>>
>> This will result in an #error if the installed header <argp.h> is used by
>> applications.
>
> Then let's remove those three lines. They are not essential for Gnulib,
> and staying in sync with glibc is more important than the extra
> error-checking they might provide for Gnulib users.

We also have to adjust the use of the macros _GL_INLINE_HEADER_BEGIN, 
_GL_INLINE_HEADER_END, and _GL_INLINE.  The gnulib version currently 
assumes that _LIBC is always defined for a glibc header, which is not 
true when the header is installed.

I would like to use the minimal patch as a start.  We can sync with 
gnulib once it has fixed the non-gnulib, !_LIBC case.

Florian