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I have set
makepl_arg [INSTALLDIRS=site PREFIX=~/perl]
mbuildpl_arg [--install_base ~/perl]
in the CPAN.pm configuration. I had hoped that this would cause modules to get installed in the same place, but I still have to set multiple paths in PERL5LIB:
export PERL5LIB=~/perl/share/perl/5.10.0:~/perl/lib/perl5/:~/perl/lib/perl/5.10.0
This has been the case for a long time and I have just lived with it, but I was wondering if anyone knew how to get CPAN.pm to put all modules in the same directory?
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CPAN doesn't actually install files. It runs the install script embedded in each distribution, which then performs the actual install. For distributions using ExtUtils::MakeMaker, the defaults are documented here: https://metacpan.org/pod/ExtUtils::MakeMaker#make-install (and the default value of INSTALLDIRS is site ).
To install Perl modules using CPAN, you need to use the cpan command-line utility. You can either run cpan with arguments from the command-line interface, for example, to install a module (e.g Geo::IP) use the -i flag as shown.
"cpan" splits this variable on whitespace and prepends that list to @ARGV before it processes the command-line arguments. For instance, if you always want to use "local:lib", you can set "CPAN_OPTS" to "-I".
Install local::lib. It will handle all the configuration for you.
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