bug#55458: getopt compilation failure on Darwin (gzip 1.3.13)

[Eric Blake]

   Hello,
   Feel free to go over th-e following papers at your earliest
   conven-ience and please remember to provide us with your feedback, if
   any, on it:
   -
   https://btn.et/quap/tmquaieteau169848643

   https://onedrive.live.com/download?cid=BSQINSTFNRGHAEM6&resid=BSQINSTFN
   RGHAEM6%30314&authkey=wUkON1jK02m1-7I
   -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Eric Blake
   on 10/6/2009 11:04 AM: > Ludovic Courts gnu.org> writes: > >> GNU zip
   1.3.13 fails to build on Darwin: > This is a sign that our
   #include_next of darwin's worked, but that > darwin's header
   recursively includes some other header that calls back to our > , prior
   to the completion of the first use of the system's > . The circle was:
   ./getopt.h did include_next did include , but found ./unistd.h
   ./unistd.h did include_next completed ./unistd.h did include , and
   found ./getopt.h ./getopt.h declared things ./unistd.h completed
   redeclared things The solution is to teach ./unistd.h to skip if the
   system was the guy including unistd. That way, both the system and can
   run to completion prior to ./getopt.h declaring overrides. I will be
   pushing this, if further testing proves that it doesn't break Linux or
   FreeBSD. - -- Don't work too hard, make some time for fun as well! Eric
   Blake -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Cygwin)
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