To compile and install gpcalendar, you need Free Pascal from
www.freepascal.org, and the gtk libraries properly installed.

test_gpc_option does not currently work :(

If you are unsure of your code, use the test_ programs to test your
modifications.  Please feel free to submit new code and tests to
me!  However, they will all need to be under the GPL 2 License.

Once you have everything set up, use the command
fpc gpcalendar.pas
to compile.