On Friday 19 November 2010 06:14:19 Chap Harrison wrote:
> Hi folks,
>
> The current version of Ubuntu Linux I'm using comes with Perl 5.10.1, but I
> want to install and develop under 5.12.2. From what I've read in
> Perlmonks and Stackoverflow, it's not difficult to install a separate
> version - all it needs is its own directory. But I'm a little unclear
> about how to leave things so that system utilities (such as system update)
> continue to find the 5.10 version, while at the same time I can run 'cpan'
> and have it use 5.12 as its context.
>
> Perlbrew was mentioned, but it doesn't seem to be unanimously considered a
> good solution to my problem.
Where do you see people speak against perlbrew?
>
> I figure I should leave the /usr/bin/perl symlink exactly the way it is,
> pointing to the "system" perl, 5.10.1.
That's right.
>
> I figure I should create a /usr/bin/perl512 symlink to point to my 5.12.2
> version.
Oh no! Bad idea. Don't put two Perls under /usr. Install this perl under
/opt/perl-5.12.2 or ~/opt/perl-5.12.2 and make it promoted in the path.
Make sure only your user and not root are seeing it in the path.
>
> I figure I will have to begin my Perl programs with #!/usr/bin/perl512.
>
You can also use #!/usr/bin/env perl.
> Are there considerations for my .bashrc file? ($PATH, $PERL5LIB)
>
> I have no idea whether 'cpan' is going to behave the way I want it to
> (leaving the 5.10 system alone, only modifying 5.12)
>
> Can anyone suggest (or point to) a "best practice" way to handle this
> situation - i.e. managing both a "system" version and a development
> version?
>
Try using perlbrew.
Regards,
Shlomi Fish
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