[Qt-interest] Making a Qt program into a dynamic library

[Arnold Krille]

On Tuesday 15 December 2009 16:21:49 Guido Seifert wrote:
> Hi, I have to need to convert a whole Qt program into a dynamic lib.
> I tried to replace the TEMPLATE = app with TEMPLATE = lib in my .pro file
>  and get a nice .so file. Unfortunately I get a segfault as soon as the
>  dynamic link loader tries to open the lib. Problably some global init
>  going wrong.
> Am I out of luck, or is there some trick I could try?

This is actually not as un-common as some think. KDE used this at least 
through its KDE3 to speed up application startup. A typical KDE app would be a 
special main-entry linked as lib and then either the "real" app or kdeinit 
could dlopen this and run it. And this worked, so it should be possible.
Maybe have a look at the sources of KDE3?

Arnold
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