Calc is open source. Contributions of code are welcome.

We welcome and encourage you to send us:

    * calc resource files (cal/*.cal files)
    * calc shell scripts (cscript/*.calc files)
    * builtin functions that you have modified or written, i.e.:
	assocfunc.c comfunc.c func.c func.h
	listfunc.c matfunc.c qfunc.c zfunc.c
    * custom functions that you have modified or written
    * help files modified or written (help/*)
    * Makefile improvements (Makefile, */Makefile)
    * other source code modifications (*.c, *.h)
    * etc. (* */* :) )

In order to consider integrating your code, we need:

    * calc version you are working with (please try use the latest version)
    * new help files or help file patches, if applicable (documentation)
    * proposed text for the CHANGES file (brief description of what it does)
    * regress.cal test patch as needed
    * your source code and/or source code changes (:-))

If you add functionality to calc, please be sure to modify/patch/add
Makefiles, help files, cal/regress.cal test code as well.
Regression test cases are vital to maintaining calc's level
of correctness and helps us avoid code bug regression.

Please try to generate a patch against the most recent
version of calc, and if you use GitHub, the top of the
master branch:

    https://github.com/lcn2/calc

The best way contribute to calc bug is to generate calc
GitHub pull request:

    https://github.com/lcn2/calc/pulls

Your code needs to be contributed under either the 2.1 of the GNU
Lesser General Public License (LGPL 2.1) or in the public domain.

If you do not want to use calc GitHub, then send Email to:

    calc-contrib-mail at asthe dot com

    NOTE: Remove spaces and replace 'at' with @, 'dot' with .

You MUST use following SPECIAL PHRASE in your Email Subject line:

    calc contribution

You may add additional words to your subject line.

Suggestion:

    From time to time, the Email address and Subject SPECIAL PHRASE
    may change so verify you have the current info by visiting:

	http://www.isthe.com/chongo/tech/comp/calc/calc-contrib.html

IMPORTANT: If your Email doesn't contain the above phrase,
	   then we WILL NOT SEE your Email.

PLEASE BE SURE you have that SPECIAL PHRASE somewhere in the subject line!

Keep in mind that the best way to report on a calc bug is to use
the above mentioned calc GitHub procedure.

Please be patient as we cannot always respond to Email messages quickly.

=-=

See also the calc wishlist by running the calc command:

    ; help wishlist

=-=

## Copyright (C) 1999,2014,2021  Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
## or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL.  You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
##
## Under source code control:	1997/03/09 16:33:22
## File existed as early as:	1997
##
## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/