Qt on Linux
lazarus / 1-Linux

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tk · 2009-10-23 07:32

Hi,
I'm trying to install Qt on Linux to compile my projects under Qt
there. I compiled and installed Qt and added all those paths but the
linker still doesn't find the usr/local/Trolltech/../lib folder where
the compiled libraries are located. I can link only if -rpath is
specified as linker options. How to avoid this, i.e. I don't want add
this -rpath option for every project.

If I type echo $PATH I get:
/usr/local/Trolltech/Qt-4.5.3/lib:/usr/local/sbin:... etc.

Thanks
TK

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zeljko · 2009-10-23 08:52

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/Trolltech/lib
or  add to your $HOME/.bash_profile
export PATH=$PATH:YOUR_ADDON_PATH

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alter · 2009-10-23 13:28

Curiousity: What dsitribution you are using? Most actual have packages
for KDE 4.3 which means those distribution also have packages with Qt
4.5

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Troodon · 2009-11-25 21:03

Has anyone been able to successfully compile an application using the
qt widgetset and the qt4.5.x library on Ubuntu 9.10? Building the LCL
completes successfully but building the default project crashes here:

Code:
[Select]/usr/lib/lazarus/0.9.28.2/lcl/units/i386-linux/qt/qtwidgets.o:
In function `TQTFILEDIALOG__SETSELECTEDFILTER':
qtwidgets.pas:9702: undefined reference to `QFileDialog_selectFilter'
/usr/lib/lazarus/0.9.28.2/lcl/units/i386-linux/qt/qtwidgets.o: In
function `TQTFILEDIALOG__GETFILTERS':
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?

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Blaazen · 2009-11-25 21:30

Now I updated Lazarus to latest svn 22775 and
Code: [Select]make PREFIX=/usr clean all LCL_PLATFORM=qt
and my project works well.

Kubuntu 9.10 64bit. FPC 2.5.1

Or did you also mean compiling Qt 4.5 framework ?

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Troodon · 2009-11-25 21:32

Quote from: Blaazen on November 25, 2009, 10:30:06 pmOr did you also
mean compiling Qt 4.5 framework ?
No, I installed Qt4.5 from the repositories (including the dev
packages). The Lazarus LCL for Qt builds OK. It's when I try compiling
the application that I get the error messages. I will try a nightly
build. (ups! there are no fpc-2.3.1 or higher .deb daily snapshots)