From daniel at coder.com  Fri Sep  9 12:31:08 2011
From: daniel at coder.com (Daniel R. Allen)
Date: Fri, 9 Sep 2011 15:31:08 -0400 (EDT)
Subject: [kw-pm]  Talk next Thursday: Node.js, Part Two
Message-ID: <Pine.LNX.4.44.1109091409200.24861-100000@matrix2.coder.com>

The September KW Perl Mongers talk is next Thursday, Sept. 15th.
The main topic will (again) be Node, a flexible event-driven I/O framework
for server-side Javascript. http://nodejs.org/

baud will present on Haraka, a speedy little node SMTP server.
https://github.com/baudehlo/Haraka/blob/master/README.md

You're not required to have come to the July talk. (In fact, some of us
may be hoping we still remember any of the content from July- MONTHS
ago!)

Pizza and pop/water are provided, sponsored by $anonymous.

By next Thursday please put yourself on the pizza-list at:
http://kw.pm.org/wiki/index.cgi?PizzaList

We are meeting in our usual location, DC 3323, at 7pm.

Various other details can be found on our webpage at http://kw.pm.org/

Any questions, give a shout; either on this list, or irc.perl.org,
channel #uc

-Daniel



From matt at sergeant.org  Tue Sep 13 08:40:06 2011
From: matt at sergeant.org (Matt Sergeant)
Date: Tue, 13 Sep 2011 11:40:06 -0400
Subject: [kw-pm] Talk next Thursday: Node.js, Part Two
In-Reply-To: <Pine.LNX.4.44.1109091409200.24861-100000@matrix2.coder.com>
References: <Pine.LNX.4.44.1109091409200.24861-100000@matrix2.coder.com>
Message-ID: <4E6F7956.30208@sergeant.org>

FWIW I'll only touch on Haraka - mostly I'll talk about Perl vs Node.js

Daniel R. Allen wrote:
> The September KW Perl Mongers talk is next Thursday, Sept. 15th.
> The main topic will (again) be Node, a flexible event-driven I/O framework
> for server-side Javascript. http://nodejs.org/
>
> baud will present on Haraka, a speedy little node SMTP server.
> https://github.com/baudehlo/Haraka/blob/master/README.md
>
> You're not required to have come to the July talk. (In fact, some of us
> may be hoping we still remember any of the content from July- MONTHS
> ago!)
>
> Pizza and pop/water are provided, sponsored by $anonymous.
>
> By next Thursday please put yourself on the pizza-list at:
> http://kw.pm.org/wiki/index.cgi?PizzaList
>
> We are meeting in our usual location, DC 3323, at 7pm.
>
> Various other details can be found on our webpage at http://kw.pm.org/
>
> Any questions, give a shout; either on this list, or irc.perl.org,
> channel #uc
>
> -Daniel
>
>
> _______________________________________________
> kw-pm mailing list
> kw-pm at pm.org
> http://mail.pm.org/mailman/listinfo/kw-pm
>

From daniel at coder.com  Wed Sep 14 09:40:51 2011
From: daniel at coder.com (Daniel R. Allen)
Date: Wed, 14 Sep 2011 12:40:51 -0400 (EDT)
Subject: [kw-pm]  Talk tomorrow: Node.js, Part Two
Message-ID: <Pine.LNX.4.44.1109141239270.24861-100000@matrix2.coder.com>

Pizza-list reminder for tomorrow's meeting!
http://kw.pm.org/wiki/index.cgi?PizzaList

---------- Forwarded message ----------
Date: Fri, 9 Sep 2011 15:31:08 -0400 (EDT)
From: Daniel R. Allen <daniel at coder.com>
To: kw-pm at mail.pm.org
Subject: [kw-pm]  Talk next Thursday: Node.js, Part Two

The September KW Perl Mongers talk is next Thursday, Sept. 15th.
The main topic will (again) be Node, a flexible event-driven I/O framework
for server-side Javascript. http://nodejs.org/

You're not required to have come to the July talk. (In fact, some of us
may be hoping we still remember any of the content from July- MONTHS
ago!)

Pizza and pop/water are provided, sponsored by $anonymous.

By next Thursday please put yourself on the pizza-list at:
http://kw.pm.org/wiki/index.cgi?PizzaList

We are meeting in our usual location, DC 3323, at 7pm.

Various other details can be found on our webpage at http://kw.pm.org/

Any questions, give a shout; either on this list, or irc.perl.org,
channel #uc

-Daniel


_______________________________________________
kw-pm mailing list
kw-pm at pm.org
http://mail.pm.org/mailman/listinfo/kw-pm


From rpjday at crashcourse.ca  Wed Sep 21 05:13:40 2011
From: rpjday at crashcourse.ca (Robert P. J. Day)
Date: Wed, 21 Sep 2011 08:13:40 -0400 (EDT)
Subject: [kw-pm] numerous "perl: symbol lookup error" issues in a large
 software build
Message-ID: <alpine.DEB.2.02.1109210750420.8347@localhost6.localdomain6>


  i'm hoping one of you perl wizards can help me with something, as i
need to resolve an annoying issue ASAP (as in, this morning if
possible).  if you're the first one to come up with the solution, the
next time i am in K-W, i will buy you a *case* of beer.  so here it
is.

  i have my 64-bit laptop running a fully-updated ubuntu 11.04, and
i'm using a proprietary build system to create an embedded linux
image.  (if you're familiar with openembedded, poky or yocto, you're
thinking along the right lines.)

  the build involves creating a root filesystem full of stuff for a
target board, so it involves starting with a number of pristine
software tarballs, untarring each one, configuring, possibly applying
some patches, then (cross-)compiling each one and installing it in a
root filesystem location.  eventually, once all of the packages are
built and installed, that root filesystem is turned into an
appropriate binary image and flashed to the target board.

  so, as i said, part of the process is to untar a pristine tarball,
possibly patch it, configure it, then compile it, and that's where the
problems start, as a number of those patches fail their config step
looking for missing perl symbols.

  the first package that failed that way was the pacemaker package,
and it failed simply trying to create the documentation that would be
installed in the docs directory using publican, thusly:

===== big snip here =====
cd Pacemaker_Explained && /usr/local/bin/publican build --publish
--langs=all --formats=pdf,html,html-single,txt
perl: symbol lookup error: /usr/lib/perl5/auto/HTML/Parser/Parser.so:
undefined symbol: Perl_Istack_sp_ptr
Makefile:617: *** [Pacemaker_Explained.txt] Error 127
===== end build =====

  obviously(?), the publican package is invoking perl, and there's
some XML and HTML parsing going on behind the scenes, at which point
we have that symbol lookup error.

  i had no idea how to start debugging that so i posted to the perl
beginners list and one person said he'd run into the same problem and
solved it by installing the HTML::Parser module from CPAN.  now, i
have the ubuntu "libhtml-parser-perl" package installed which gives me
that module but, as i understand it (and i might have misunderstood),
i need to replace/update that with the CPAN module.

  if that's correct, i don't understand why.  also, i would think i'd
have to remove that ubuntu package first, and there's a *ton* of
packages that depend on it, so that's not going to happen.  would i
simply use CPAN to install that module?  and would it take precedence?
and, ***most importantly***, why would that solve things?  what kind
of problem is this that installing a newer module would solve?  and
does it represent something in the build software itself that needs to
be tweaked?  in short, i not only want a solution, i want to know why
this is happening and how to avoid it in the future.  but wait,
there's more.

  to get around that offending package, i simply removed it from the
list of packages to be built.  at which point, the next package (and a
few more) failed similarly looking for a *different* symbol:

+ autoreconf
perl: symbol lookup error: /usr/lib/perl5/auto/Cwd/Cwd.so: undefined
symbol: Perl_Gthr_key_ptr
autoreconf: gnu-configize failed with exit status: 127

  so it's a different missing symbol but i'm guessing this would have
a similar solution (at last count, four packages failed looking for
precisely that symbol).

  so ... what do i do?  do i just install a newer CPAN module, which
would override the current ubuntu package module?  is that the
recommended solution?  and why?

  oh, one last thing.  this is happening on ubuntu 11.04.  officially,
this build should simply work on ubuntu 10.04.  i haven't verified
that personally, but it's supposed to.  so that suggests there's
something that changed between ubuntu 10.04 and 11.04 that's causing
this.

  anyway, thoughts?  i'd really like to resolve this as quickly as
possible.  thanks.

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================

From fulko.hew at gmail.com  Wed Sep 21 06:39:58 2011
From: fulko.hew at gmail.com (Fulko Hew)
Date: Wed, 21 Sep 2011 09:39:58 -0400
Subject: [kw-pm] numerous "perl: symbol lookup error" issues in a large
 software build
In-Reply-To: <alpine.DEB.2.02.1109210750420.8347@localhost6.localdomain6>
References: <alpine.DEB.2.02.1109210750420.8347@localhost6.localdomain6>
Message-ID: <CAGuV3hMnJyrxVbDAOs_Khr0__6pD_UTXi1yk+FdxnDap4XrwYw@mail.gmail.com>

On Wed, Sep 21, 2011 at 8:13 AM, Robert P. J. Day <rpjday at crashcourse.ca> wrote:

... snip ...

> ===== big snip here =====
> cd Pacemaker_Explained && /usr/local/bin/publican build --publish
> --langs=all --formats=pdf,html,html-single,txt
> perl: symbol lookup error: /usr/lib/perl5/auto/HTML/Parser/Parser.so:
> undefined symbol: Perl_Istack_sp_ptr
> Makefile:617: *** [Pacemaker_Explained.txt] Error 127
> ===== end build =====
>
> ?obviously(?), the publican package is invoking perl, and there's
> some XML and HTML parsing going on behind the scenes, at which point
> we have that symbol lookup error.

My take on this is that Parser is written partly in Perl, and partly
in (probably) C.
(the stuff in the .so file).  When 'Parser' was packaged/installed on Ubuntu,
they packaged up/installed the Perl part, but not the corresponding .so
file (or its an _incompatible_ version of the .so file).

... snip ...

> i need to replace/update that with the CPAN module.

Because that would provide you with the appropriate (working)
_pair_ of files.

> ?if that's correct, i don't understand why. ?also, i would think i'd
> have to remove that ubuntu package first, and there's a *ton* of
> packages that depend on it, so that's not going to happen. ?would i
> simply use CPAN to install that module? ?and would it take precedence?
> and, ***most importantly***, why would that solve things? ?what kind
> of problem is this that installing a newer module would solve? ?and
> does it represent something in the build software itself that needs to
> be tweaked? ?in short, i not only want a solution, i want to know why
> this is happening and how to avoid it in the future. ?but wait,
> there's more.

Hopefully when you rebuild it, it will be built (to install) in the same
places as what Ubuntu does when they create their distribution.

When you rebuild, you should pay attention to what is being installed
and where, so that you can console yourself that you've done the
right thing to the right places.

... snip ...

> ?so ... what do i do? ?do i just install a newer CPAN module, which
> would override the current ubuntu package module? ?is that the
> recommended solution? ?and why?

Yup, that would be my first approach (short of getting Ubuntu to fix their
distribution, but you said you need the problem fixed 'this morning').

Fulko

From tyler at piwebsolutions.ca  Tue Sep 27 22:55:33 2011
From: tyler at piwebsolutions.ca (Tyler Slijboom)
Date: Wed, 28 Sep 2011 01:55:33 -0400
Subject: [kw-pm] Perl Weekly
Message-ID: <4E82B6D5.2070006@piwebsolutions.ca>


I recently joined this weekly newsletter on Perl, and I find it can be 
helpful.

http://perlweekly.com/


-- 
Sincerely,
Tyler Slijboom
PI Web Solutions, Inc.
www.piwebsolutions.ca