RE: libGQt.so: undefined reference to `QWidget::repaint(bo ol)'

From: Faine, Valeri <fine_at_bnl.gov>
Date: Tue, 10 May 2005 13:02:12 -0400

Hello Jacek,

I believe the Qt layer of ROOT was compiled and built against of 3.3.2  (in other words against of CERN-LCG default version as seen on afs  /afs/cern.ch/sw/lcg/external/qt/3.3.2 )

 See: http://root.cern.ch/root/Version40402.news.html

 It says,
" . . .
  Qt Improvements

• The Qt interface is now running on 64 bits platforms.
• The Qt interface requires the use of Qt3.3.2 in SLC3 environment . . . "

 We found Qt 3.1 is too buggy to support the functionality ROOT needs.  See: http://root.bnl.gov/QtRoot/QtReleaseNotes.html

You are advised to install the fresh version, which Qt 3.3.4 at the moment. It should be binary compatible with the ROOT distribution. http://www.trolltech.com/download/qt/x11.html

The recommended flags to install the Qt are

./configure -thread -no-xft -qt-gif -no-exceptions

I've found the

http://linuxsoft.cern.ch/repository/i386updates/kdevelop-3.0.4-1.cern.i386.h tml

claims to be built against Qt 3.3.

I do not know whether this "rpm" is sufficient to bring the Qt 3.3 up.

---

Best regards

                   Valeri

> -----Original Message-----

> From: owner-roottalk_at_pcroot.cern.ch [mailto:owner-roottalk_at_pcroot.cern.ch] On

> Behalf Of Jacek M. Holeczek
> Sent: Tuesday, May 10, 2005 11:54 AM
> To: RootTalk
> Subject: RE: [ROOT] libGQt.so: undefined reference to `QWidget::repaint(bo

ol)'

> 
> Hi,
> the "qt" is the "default" one on SLC3/i386 coming from "rpms":
> 	qt-3.1.2-13.4 / qt-devel-3.1.2-13.4
> In both cases, only the ROOT version is changed (i.e. PATH and
> LD_LIBRARY_PATH point to slightly different locations).
> Note, however, that ... I am not able to LINK the executable (i.e. the
> executable is NOT created at all) in case I try ROOT v4.04.02, while
> everything is fine with ROOT v4.03.04.
> There are NO other "differences" which are related to this change (the
> compiler "output" in both cases is exactly the same).
> Best regards,
> Jacek.

Received on Tue May 10 2005 - 19:02:31 MEST