Twas brillig at 22:39:25 06.09.2011 UTC+02 when dan...@haxx.se did gyre and 
gimble:

 DS> ... this is not POSIX compliant so this command will cause grand error 
outputs
 DS> on lots of platforms. I think you need to do some basic checks first to 
see if
 DS> -M and --warnings etc work.

 DS> Or am I wrong?

You're right, SUSv4 only specifies -k as the required option. What do
you think, is testing `man --help | grep -- --warnings` enough?

-- 
  http://fossarchy.blogspot.com/

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