Am 08.08.2012 um 17:38 schrieb Kenneth Lerman:

>> 
> I don't understand. Why are you referring to the "copy code" rows 
> instead of the "use library" rows?

Because of my deplorable inclination towards group think ;): Trying to figure 
things out I read up on IRC logs on the issue, and my post reported the gist - 
I think it was about modbus, see 
http://linuxcnc.mah.priv.at/irc/%23emc-devel/2010-05-23.html#04:02:38

see also today's chat: 
http://linuxcnc.mah.priv.at/irc/%23linuxcnc-devel/2012-08-08.html#13:11:15

> Can't we just ship the library? I'm 
> not sure, but I would think we could even ship the source of the library 
> (after all, the GPL's require that we provide source).

Well in fact, the library is part of the Ubuntu repo, starting with precise: 
https://launchpad.net/ubuntu/+source/zeromq/ and there is a ppa for 10.04, so 
there wouldnt be a need to "ship it" or "copy the source" - AFACIT it is a 
external shared library reference, period

An interesting question to ask is: does  'present in the ubuntu repo' translate 
into 'can be made a prerequisite for a Linuxcnc install' - that I have no 
answer to

It could be very well that the community opinion, including mine, on the 
licensing issue is completely off base. 

Let me give an example why I think so:

- the Zeromq code examples page lists a Nagios plugin: 
http://www.zeromq.org/code:_start (btw written by Pieter Hintjens, the project 
lead)
- I downloaded the nagios source code, and the toplevel LICENSE file says: 
        GNU GENERAL PUBLIC LICENSE Version 2, June 1991
NB: no lesser, no 'or later', no nothing.

The question is: how is this in any way different from the LinuxCNC use case? I 
dont see any such difference.

It could well be I asked the wrong question, and assumed 'referring to a 
library' IS copying.

> "Copy code" should only apply if we take all or some of the source and 
> modify it.

that would not be the intent, in fact I'd try to avoid that unless pointed at 
with a gun

-m

> 
> [I have to admit, I have NOT read the details of the various licenses in 
> a long time, so I might be all wet.]
> 
> Ken
>> 
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