[Qt-interest] LGPL and static linking

[BRM]

A static library cannot be dynamically loaded as it is linked at compile time to produce the binary.


If you use static linking, to comply with the LGPL you have to provide a method that the user can relink whatever needs to be linked against the LGPL code.
Most projects will include a Makefile like method - they still have to have the compiler and tools, but the project provides a Makefile that will run the linking.

Ben


----- Original Message ----
From: alexander golks <alex at golks.de>
To: qt-interest at trolltech.com
Sent: Wed, November 25, 2009 5:03:19 AM
Subject: Re: [Qt-interest] LGPL and static linking

as far as one reads:

"Alternatively, a statically linked library is allowed if either source code or linkable object files are provided."

thus, if i give the source or linkable objects files, that "load" the static libs,
and not the whole closed source of my programm,
this would suffice the lgpl terms?
e.g. if i write a "LPGL wrapper loader" for the statically linked qt dll,
this would be safe?
but in turn, the speed and memory efforts are null and void,
cause this wrapper must be a dll, too?
what if i allow my wrapper to be linked statically? 
like here: http://en.wikipedia.org/wiki/GPL_linking_exception

you see, i've tried to understand this gpl, lgpl, etc. stuff, 
and in germany lawyers tend to argument in different ways about this all.
furtheron, as far as i know, no court in germany has yet delivered a judgment 
in this special case.

after all, one must consult a lawyer to get on the safe side, whatever was written here...

Am Wed, 25 Nov 2009 10:33:56 +0100
schrieb qt-interest-request at trolltech.com:

> LGPL only allows for dynamic linking of the Qt libraries. If you want static linking, you can switch to GPL (probably not what you want), or get a commercial license.
> 
> http://en.wikipedia.org/wiki/GNU_Lesser_General_Public_License
> http://en.wikipedia.org/wiki/GNU_Lesser_General_Public_License#Differences_from_the_GPL

-- 
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*  fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (0)!!!!\n");
*          linux-2.6.6/drivers/atm/firestream.c
*/