Deploying a Qt app

[drave]

Err ! How ?

I have an app in "c:\Program Files\MyApp" with all the qt dll's and plugins in subdirectors below that.

I created a qt.conf with
[Paths]
Prefix = c:\Program Files\MyApp

and put that in my app directory, but this not picked up. QT insists that plugins should be where they are on my dev machine ie. "c:\Qt\2010.02.1\qt"

whats the problem?

thanks

[tbscope]

Here's your problem:

Prefix = c:\Program Files\MyApp

But I don't know how you can solve it, after looking in the documentation, it doesn't say how you can escape spaces.
Did you try putting the path between quotes?

[squidge]

I find you can use quotes and that you need to double up on the slashes, but I've not actually tried with spaces.

eg.


[Paths]
Prefix = "c:\\Qt\\2009.03-vstudio-static\\qt\\"


(Without the double slashing, it seems to concat all the seperate path parts together)

[drave]

well i tried that but it still didnt work (double backslash and quotes)

ive now found the "qApp->addLibraryPath" call which seems to do the trick, but the qt.conf way would be better

[sirius]

From the QDir doc:
Qt uses "/" as a universal directory separator in the same way that "/" is used as a path separator in URLs. If you always use "/" as a directory separator, Qt will translate your paths to conform to the underlying operating system.

Maybe this applies to qt.conf too? Try
Prefix = c:/Program Files/MyApp or
Prefix = "c:/Program Files/MyApp"

[sirius]

Btw, have you read doc:qt-conf.html?


On Windows and X11, the Prefix is relative to the directory containing the application executable (QCoreApplication::applicationDirPath()). On Mac OS X, the Prefix is relative to the Contents in the application bundle. For example, application.app/Contents/plugins/ is the default location for loading Qt plugins.

When I deploy applications on Windows I put the Qt DLLs in the same directory as the app, and the plugin DLLs in a subfolder called plugins. No qt.conf needed. How's your directory structure?

[drave]

Hi apologies for the delay but i had to be away, anyway ....

My current setup has exe,dlls and qt.conf in "c:\myapp" with a subfolder called plugins,as you say. if i do not use qt.conf (i previously had a stupid syntax error) or qApp->addLibraryPath then the app cannot find the sqlite driver in plugins\sqldrivers and
QLibraryInfo::location(QLibraryInfo::PrefixPath) has a value of "c:\qt\2010\qt"
QLibraryInfo::location(QLibraryInfo::PluginsPath) has a value of "c:\qt\2010\qt\plugins"

how do you get away without a qt.conf ?

[squidge]

By default the plugins path is just "Plugins". So the Plugins directory is a sub-dir of wherever the application is and so a qt.conf is not required.

Unless you modified the default when you rebuilt the library.

Regardless, you can always use something like setLibraryPaths() (or addLibraryPath())