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====== Perl ======

===== List Perl libraries locations =====

<cli prompt='#'>
[root@lnx80 ~]# perl -e 'print join("\n",@INC)'
/usr/local/lib64/perl5
/usr/local/share/perl5
/usr/lib64/perl5/vendor_perl
/usr/share/perl5/vendor_perl
/usr/lib64/perl5
/usr/share/perl5
</cli>

===== List Perl libraries =====

<cli prompt='#'>
# perl -MFile::Find=find -MFile::Spec::Functions -Tlwe 'find { wanted => sub { print canonpath $_ if /\.pm\z/ }, no_chdir => 1 }, @INC'
</cli>

<cli prompt='#'>
# perldoc -l DBI
/usr/opt/perl5/lib/site_perl/5.28.1/aix-thread-multi/DBI.pm
</cli>

===== Perl modules ===== 

<cli prompt='#'>
[root@fedora ~]# pmall
Encode (3.19) - character encodings in Perl
Clone (0.46) - recursively copy Perl datatypes
Storable (3.26) - persistence for Perl data structures
Cwd (3.84) - get pathname of current working directory
DBI (1.643) - Database independent interface for Perl
Socket (2.036) - networking constants and support functions
Term::ReadKey (2.38) - A perl module for simple terminal control
Sub::Util (1.63) - A selection of utility subroutines for subs and CODE references
IO::Compress::Brotli (0.004001) - Write Brotli buffers/streams
IO::Uncompress::Brotli (0.004001) - Read Brotli buffers/streams
Digest::SHA (6.04) - Perl extension for SHA-1/224/256/384/512
...
</cli>

==== cpan proxy ====

<cli prompt='>'>
root@aixtest:/root > /opt/freeware/bin/cpan
o conf init /proxy/
 <ftp_proxy>
Your ftp_proxy? [] w.x.y.z:<port>

 <http_proxy>
Your http_proxy? [] w.x.y.z:<port>
http://10.10.10.10:8080/

 <no_proxy>
Your no_proxy? [] w.x.y.z:<port>

Proxy userID ?

Proxy password ?

o conf commit
</cli>

<cli prompt='>'>
root@aixtest:/root > perl –MCPAN –e'install <module_name>' 
</cli>

Or 
<cli prompt='>'>
root@aixtest:/root > cpan Devel::PPPort
</cli>

==== CPAN error while install modules ====

Dependencies between modules can be found in CPAN site

==== CPAN error ====

Error downloading with HTTP::Tiny: Not a CODE reference 

Set the proxy also 
  export http_proxy="http://user:pass@proxyserver:8080"
  export https_proxy="http://user:pass@proxyserver:8080"
  export ftp_proxy="http://user:pass@proxyserver:8080"



https://community.ibm.com/community/user/power/blogs/jan-harris1/2022/03/21/aix-open-source-support-tips

==== CPAN coredumps on AIX ====

Answer

AIX does not set maxdata because it causes issues for AIX Perl-based commands.

One of the following solutions can usually resolve the issue:

1) Use the 64-bit module

2) export LDR_CNTRL=MAXDATA=0x80000000@DSA

3) Use a perl.rpm version (which is recommended for reasons that are listed in the AIX Perl Updates and Support for perl.rte technote), then use ldedit to permanently set the maxdata value

  # ldedit -b maxdata=0x80000000 "path to perl.rpm Perl binary" 

==== CPAN install modules offline ====

Download Perl module

Go to CPAN Search website and search for the module that you wish to download. In this example, let us search, download and install XML::Parser Perl module. I have downloaded the XML-Parser-2.36.tar.gz to /home/download
<cli prompt='#'>
# cd /home/download
# gzip -d XML-Parser-2.36.tar.gz
# tar xvf XML-Parser-2.36.tar
# cd XML-Parser-2.36
</cli>
<cli prompt='#'>
# perl Makefile.PL
Checking if your kit is complete...
Looks good
Writing Makefile for XML::Parser::Expat
Writing Makefile for XML::Parser
# make
# make test
# make install
</cli>

==== CPAN repository offline ====

https://www.cpan.org/modules/01modules.index.html
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