The "forks" pragma allows a developer to use threads without having to have
a threaded perl, or to even run 5.8.0 or higher.
Refer to the the threads manpage module for ithreads API documentation.
perl -Mforks -e 'print $threads::VERSION'
to see what version of the threads manpage you should refer to regarding
supported API features.
There were a number of goals that I am trying to reach with this
Using this module *only* makes sense if you run on a system that has an
implementation of the 'fork' function by the Operating System. Windows
is currently the only known system on which Perl runs which does *not*
have an implementation of 'fork'. Therefore, it *doesn't* make any
sense to use this module on a Windows system. And therefore, a check is
made during installation barring you from installing on a Windows
Artistic-1.0 OR GPL-1.0-or-later