One option that I haven't yet seen mentioned is the
/bin/env trick. If your first line is
The system will find the perl on your path and use that.
This trick was used quite a lot when standard installations
did not include Perl since it allowed "non-root" users to
install local copies of Perl. It allows the different systems to have
different locations for the perl installation and manages
to work out everything for you.
The only difficulties are:
- Security (already covered)
- Some *NIX systems put the env program somewhere
other than /bin (/usr/bin/env is quite
common, you could add a symbolic link on those
Having something that modifies your scripts for different
locations is often a bad idea (one of the great things about
Perl is that it is portable). When distributing scripts
you really don't want to have to edit the script to make
it function (like when sending to naïve users).
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