Editing Main Page (section)

==== Computers/Programming/Languages/Perl ====
* http://Jochen.Hayek.name/wp/blog-en/2012/08/01/developing-software-in-perl-i-really-like-it-with-cpanm-and-perlbrew/ – the former location of this piece of text
** http://Jochen.Hayek.name/wp/blog-en/2010/07/02/appperlbrew-manage-perl-installations-in-your-home-or-wherever-you-want/ – my own updated notes on App::perlbrew; including a note on creating a ''stable'' alias for steady and ongoing use
** http://Jochen.Hayek.name/wp/blog-en/2010/07/08/appcpanminus-a-new-cpan-installer/ – my own notes on App::cpanminus, "yet another CPAN installer" (Just for me, for finding my way through confusion.)

My usual starting point before installing a CPAN module:

<pre>
$ perlbrew switch stable
$ perlbrew install-cpanm # e.g. – never a bad idea
$ cpanm Date::Calc # e.g.
</pre>

===== books =====
* the Perl bible
** https://library.oreilly.com/book/9780596004927/programming-perl/toc.xhtml
** https://library.oreilly.com/book/9780596004927/programming-perl/454.xhtml – Chapter 17. The Command-Line Interface
* Tim Maher: Minimal Perl
** http://www.manning.com/maher/

===== the Perl syntax tree =====
* https://metacpan.org/pod/B::Concise – walk Perl syntax tree, printing concise info about ops

===== ipkg perl on Synology DSM enhanced by me =====

<pre>
root@diskstation # ipkg install perl
root@diskstation # ipkg install perl-digest-sha1
root@diskstation # ipkg install perl-io-socket-ssl

root@diskstation # chown -R johayek.users /opt/lib/perl5/site_perl

$ rsync -va opensuse132:/usr/local/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1/JSON*       /opt/lib/perl5/site_perl   
$ rsync -va opensuse132:/usr/local/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1/Getopt      /opt/lib/perl5/site_perl
$ rsync -va opensuse132:/usr/local/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1/Authen      /opt/lib/perl5/site_perl
$ rsync -va opensuse132:/usr/local/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1/Net/XMPP*   /opt/lib/perl5/site_perl/Net
$ rsync -va opensuse132:/usr/local/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1/XML/Stream* /opt/lib/perl5/site_perl/XML
$ rsync -va opensuse132:/usr/local/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1/Digest      /opt/lib/perl5/site_perl       
$ rsync -va opensuse132:/usr/local/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1/Data        /opt/lib/perl5/site_perl     
</pre>

===== plenv =====
* https://github.com/tokuhirom/plenv – perl binary manager

===== perlbrew =====

====== perlbrew for "ipkg" on Synology DSM5.2 ======

<pre>
$ ipkg install patch
$ ipkg install gcc
$ perlbrew available
$ perlbrew install   perl-5.20.2
# breaks because of missing cc
root@diskstation # cd /opt/bin && ln -s gcc cc
$ less /usr/local/perlbrew/build.perl-5.20.2.log

cc -fstack-protector -L/opt/lib -o miniperl \
    perlmini.o opmini.o miniperlmain.o   gv.o toke.o perly.o pad.o regcomp.o dump.o util.o mg.o reentr.o mro.o keywords.o hv.o av.o run.o pp_hot.o sv.o pp.o scope.o pp_ctl.o pp_sys.o doop.o doio.o regexec.o utf8.o taint.o deb.o universal.o globals.o perlio.o perlap
i.o numeric.o mathoms.o locale.o pp_pack.o pp_sort.o caretx.o   -lnsl -lgdbm -ldb -lc -lgdbm_compat 
pp.o: In function `Perl_pp_int':
pp.c:(.text+0x5e74): undefined reference to `floor'
pp.c:(.text+0x5ef3): undefined reference to `ceil'
pp.o: In function `Perl_pp_sin':
pp.c:(.text+0x6203): undefined reference to `sin'
pp.c:(.text+0x62b5): undefined reference to `sqrt'
pp.c:(.text+0x6320): undefined reference to `cos'
pp.c:(.text+0x633f): undefined reference to `log'
pp.c:(.text+0x6357): undefined reference to `exp'

$ perlbrew install   5.18.4
# same problem
</pre>