From: Jim Meyering <[EMAIL PROTECTED]>
   Date: 12 Aug 2000 09:47:59 +0200

   Thanks, but if no one can point to an actual system for which
   sed's \{m,n\} doesn't work, I'm going to document it as portable.

The sed FAQ, version 014 <http://www.cornerstonemag.com/sed/sedfaq.html> says:

* Ultrix 4.3 sed doesn't support \(...\)\{...\} (the idiom used here).
* Likewise for HHsed v1.5 (by Howard Helman).
* sedmod v1.0 (by Hern Chen) doesn't support \{...\} at all.

(Granted, these are marginal targets these days.  I vaguely recall that
someone has a bug-fix-only 4.3BSD VAX on the net somewhere in Russia,
with guest accounts.  Would that count?  :-)

Perhaps the autoconf programming-style section should mention the sed FAQ.

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