[Qt] Link failure (undefined reference to `QFileDialog_selectFilter')

[Laird]

Hi,

Before asking for your help, I want to say to the author(s) of this Qt 
interface for Lazarus: thank you for your time and effort, it's really 
great to be able to compile Lazarus projects with a Qt widgetset.

Unfortunately, though, I can't quite compile them yet: after following 
all the steps at 
<http://wiki.lazarus.freepascal.org/Qt_Interface#Quick_start_guide_for_Linux>, 
I'm still having problems - the linker complains about undefined 
references.  Here is the full set of error messages for the compilation 
of a completely new project:

> /usr/bin/ld: warning: link.res contains output sections; did you forget -T?
> /usr/share/lazarus/lcl/units/i386-linux/qt/qtwidgets.o: In function `TQTFILEDIALOG__SETSELECTEDFILTER':
> /usr/share/lazarus/lcl/interfaces/qt/qtwidgets.pas:9702: undefined reference to `QFileDialog_selectFilter'
> /usr/share/lazarus/lcl/units/i386-linux/qt/qtwidgets.o: In function `TQTFILEDIALOG__GETFILTERS':
> /usr/share/lazarus/lcl/interfaces/qt/qtwidgets.pas:9747: undefined reference to `QFileDialog_filters'
> project1.lpr(20,1) Error: Error while linking
> project1.lpr(20,1) Fatal: There were 1 errors compiling module, stopping

Any ideas on how to solve this problem?

In case it helps, I'm running Lazarus 0.9.30 on Gentoo Linux with Qt 
version 4.7.2 and Qt4Pas version 2.4; I've compiled Qt4Pas from scratch 
but the same problem occurred when I installed the pre-compiled 
binaries.  I've also created a symbolic link from libqt4intf.so to 
libQt4Pas.so as the linker had been complaining that it couldn't find 
-lqt4intf.

Cheers,
Laird