Re: Checks for getcwd(NULL, 0) and get_current_dir_name()

[Roland McGrath]

I'm pretty sure we were the first to support that behavior.  (GNU has had a
strong commitment to avoiding static limits from the beginning.)  Not that
it matters for choosing a feature macro name.  The best names for such
things are purely descriptive rather than referring to a system by name
anyway.  i.e., HAVE_GETCWD_NULL_MALLOCS or suchlike.