[Israel.pm] Perl version migration

Moshe Kaminsky kaminsky at math.huji.ac.il
Sun May 2 09:53:19 PDT 2004


Why not change just the first line of the old scripts, and rename the 
old version of perl? You can even do it systematically: whenever you 
install a new version of perl, change all the scripts which have 
unqualified /usr/bin/perl to /usr/bin/perl<previous.version>


* Jason Elbaum <Jason.Elbaum at freescale.com> [02/05/04 15:10]:
> Omer Zak wrote:
> >Is it possible to have both Perl 5.8 and Perl 5.004 installed in your
> >system, and to have the old scripts invoke Perl 5.004?
> Thanks to everyone who commented on this.
> Sure, we can install new Perl alongside old Perl - that's what we have 
> now for 5.6 (for example). The annoyance is that scripts which need a 
> particular version have to point to it explicitly ( 
> #!/usr/local/bin/perl5.6.1 ) or they'll always get 5.004. On the other 
> hand, if we just install new perl in place of old perl, we risk 
> disturbing  old scripts which may rely on features of 5.004 without even 
> knowing it. And it's probably not realistic to review all our existing 
> scripts and test them for transitioning to new versions of Perl.
> So is it *ever* possible to get out of this trap? Or will we be stuck 
> forever with default perl at version 5.004, and new versions selected 
> explicitly by the name of the perl executable?
> Thanks,
> Jason Elbaum
> Freescale Semiconductor Israel (formerly Motorola Semiconductor)
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    Moshe Kaminsky <kaminsky at math.huji.ac.il>
    Home: 08-9456841
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