[Qt-interest] Setting library path before running?

[Thiago Macieira]

Em Sexta-feira 26. Março 2010, às 05.45.39, Nikos Chantziaras escreveu:
> On 03/23/2010 03:12 AM, Anatoly Burakov wrote:
> > Hi all
> > 
> > I have an app with plugins. They all end up in appropriate directories
> > (via DESTDIR), everything works fine, except one thing. On Windows,
> > whenever the library is in the same folder - it gets loaded fine, that
> > is, i am able to launch my program right from QT Creator. On Linux,
> > however, everything works fine except i can't launch the program without
> > resorting to manually launching it from command-line (env
> > LD_LIBRARY_PATH=/path/to/my/dir). Are there any ways around this without
> > setting permanent environment variable in rc files?
> 
> Doesn't QCoreApplication::addLibraryPath() work?

Depends on the use-case. It works for finding plugins, but not for libraries 
that either the main application or the plugins depend on.

First of all, that's too late for the application. You can only run code after 
the application has been loaded, which means the libraries it depends on must 
have already been found.

Second, it doesn't affect the LD_LIBRARY_PATH variable. It will tell the Qt 
classes where to look for plugins, but it won't tell the dynamic linker where 
to look for libraries the plugins depend on.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
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