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autoconf (GNU Autoconf) 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David J. MacKenzie and Akim Demaille.

autoconf --help (return code: 0)

Usage: /usr/bin/autoconf [OPTION]... [TEMPLATE-FILE]

Generate a configuration script from a TEMPLATE-FILE if given, or
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Operation modes:
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  -W, --warnings=CATEGORY   report the warnings falling in CATEGORY [syntax]

Warning categories include:
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  `no-CATEGORY'   turn off the warnings on CATEGORY
  `none'          turn off all the warnings
  `error'         warnings are error

The environment variables `M4' and `WARNINGS' are honored.

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