solaris forte 7 cc argp fixes

[Ulrich Drepper]

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Simon Josefsson wrote:
> Do you prefer if argp/* in libc would work
> standalone on any C89 platform?

I really don't want to have even more compatiblity crap in the files.
Only the absolute minimum needed.  If this means requireing gnulib, fine.

- -- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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