Perl5.8.0 and Perl5.8.8 coexists, how to use Perl 5.8.8

[marscld]

Dear Monks, I've run into an issue with different version of Perl.Basically, the Solaris system owns Perl 5.8.0. For an request, a CGI::Session-4.20 is needed, but it can not be installed smoothly by perl Makefile.PL. However, a Perl5.8.8 is installed into a different directoy from Perl 5.8.0. Using /new_perl5.8.8_dir/usr/local/bin/perl Makefile.PL command will let the installation moving on. And CGI::Session-4.20 is installed successfully. The question is that a few cgi file would use the sesssion module, and it would need Perl5.8.8 as its running environment. How do I modify the code to let specified cgi files to invoke CGI::Session correctly ? Could you pls help on this ?

#!/usr/bin/perl
use strict;
use CGI qw/:standard/;
use lib '/home/sdbadmin/PerlModule';
use CGI::Session;

my $cgi_obj   = new CGI();
my $session = new CGI::Session() or die CGI::Session->errstr;

[Joost]

Use

#!/new_perl5.8.8_dir/usr/local/bin/perl

as the first line instead.

HTH,
Joost.

[tachyon-II]

Possibly the most convenient way to have multiple concurent versions of Perl available is to create a symlink so that /usr/bin/perl588 points to your Perl 5.8.8 install /new_perl5.8.8_dir/usr/local/bin/perl.

ln -s /new_perl5.8.8_dir/usr/local/bin/perl /usr/bin/perl588

Then you just need to do

#!/usr/bin/perl588

to use it in a script and

perl588 Makefile.PL

to do the install of CGI::Session into the 5.8.8 version of Perl. All your 5.8.0 stuff remains unchanged so nothing old should break.

[Argel]

As someone who does a lot of sysadmin work, I like to keep the OS directories as sacrosanct as possible. I think using PATH and an alias (for interactive shell use) make more sense.

[perlfan]

You can also put the perl you want first in your PATH, then use PERL5LIB to point to the proper module directories...this is how I manage multiple instances of perl, anyway.

[ph0enix]

I think that it will be enough to change first line to

#!/new_perl5.8.8_dir/usr/local/bin/perl

It is about six years ago when I work as Perl developer. I needed to test all new code for running with different versions of Perl. I've installed different perl versions to /opt/perl-${VERSION} so the system wide perl which was required for base system administration remain untouched. In addition I wrote a short application in C and save it as /usr/bin/perl_parallel. Perl_parallel read preferred Perl version from file .perl_version in user $HOME and executed script under correct Perl interpreter. There was also script use_perl for querying and updating .perl_version file. If someone is interested in the perl_parallel C source code, it can be found in C/C++ programming forum on server forum.builder.cz (page is in Czech).