Re: [sigc] Linking dynamically with SigC++ (now rather: License)

[Ulrich Eckhardt <eckhardt satorlaser com>]

On Thursday 06 July 2006 18:20, Aristid Breitkreuz wrote:
> If I understand it correctly, the exception must be bullet-proof (of
> course ;-) ) and in difference to the LGPL allow the following
> use-cases:
>      1. Using all the template stuff (generally code in headers with
>         more than 10 lines per functional unit) in libsigc++ from
>         application / library code.

Right. This permission was already given but is not explicitly stated in the 
distributed license.

>      2. Linking libsigc++ statically, at least on Windows or other
>         technically restricted platforms (I dislike Windows-DLLs).

Nope. Even on a theoretical platform where you can't link dynamically (MS 
Windows isn't one) you could still ship at least compiled objectfiles to 
allow the user to relink their code with a changed libsigC++. The fact that 
you dislike win32 DLLs and that they are inferior to Unix shared objects in 
some aspects doesn't affect the users' freedoms.

You also asked in a different mail why libsigC++ has any non-header parts at 
all, and the reason is because it can. There are some background bookkeeping 
things that are the exact same for every part of it and as such they can be 
compiled into a shared library so it doesn't take up RAM and cachelines in 
every program that uses libsigC++. Of course, creating a completely 
header-only libsigC++ would be possible, but that would be like enforcing 
static linking and might even lead to code bloat on not-so-smart 
compilers/linkers.

Uli





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