Re: upgrading perl

From: Erik Norgaard (norgaard_at_locolomo.org)
Date: 12/31/04

  • Next message: Toni Schmidbauer: "Re: login problems" 
    Date: Fri, 31 Dec 2004 12:46:09 +0100
To: Karl Agee <kdagee@hotmail.com>

    Karl Agee wrote:
    > Freebsd 4.11-pre. I am working on learning perl, and have perl 5.00x
    > that is in the base system when I installed 4.10-Release. Since most of
    > the learning materials out there are based on later verisions esp since
    > 5.6.x some of the features arent in this older version.
    >
    > I am considering upgrading to 5.8.5 via ports, but, dont know if that
    > will break anything.

    It won't break anything.

    You can have the base install, 5.6.x and 5.8.x installed from ports
    simultaneously. After installing perl from ports you run

        /usr/local/bin/use.perl port

    This will create links to the port install, eg.

        /usr/bin/perl -> /usr/bin/perl5.8.5

    And you can go back with

        /usr/local/bin/use.perl system

    Which will then replace the link with, eg.

        /usr/bin/perl -> /usr/bin/perl5

    These are the limitations:

    use.perl can only switch between one installed port-version and the
    system perl. So if you want to use another port-version (ie. for some
    reason you want both 5.6.x and 5.8.x) you will have to do the linking
    manually.

    When you install perl-packages they will be installed into the package
    path of the currently selected perl. So if you use 5.8.5 and install say
      p5-DBI then this won't be available for the system perl. However, perl
    looks backward, so 5.8.5 sees packages installed for the system perl.

    I haven't found big differences between 5.6 and 5.8, so I'd suggest you
    use 5.8. The main reason to stick with an older version is that you
    might develop scripts for platforms where the newer are not available.

    Note: If/when you upgrade to 5.x there is no system perl, this is partly
    to avoid the mess with multiple versions of perl.

    Cheers, Erik 

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