> usual #!/usr/bin/perl first line, Not exactly on topic, but FWIW I recommend #!/usr/bin/env perl. That does not assume any particular Perl location. Personally I find that preferable to Perl checking in configure scripts, since then the resulting has a better chance of working on more systems.
(Of course this is not a panacea, if nonstandard Perl packages or some such are needed this would not be helpful, but for "simple" scripts ...)
