RE: ROOT Qt Manual Example

From: Fine, Valeri <>
Date: Wed, 19 Apr 2006 20:18:23 -0400

Dear Kerry,

Thank you very much for your message.  

I have tested the example in question and found couple typos there.

The shell command on page 396  


must be


The ROOT commands there are

   root[] gSystem->Load("")

   root[] MyQButton knopka;  

must be  

   root[] gSystem->Load("")

   root[] TMyQButton knopka;  

I did fix the problems and did test the example works as described with the "standard" ROOT distribution with no "extension"  

Please, find the protocol of my Linux session uploaded:  

All files there were "copy / paste" with the mouse directly from the ROOT Manual and executed "as is".  

Please, indicate which version of ROOT you did try.

There were a few bug in the ROOT Qt project files (see $ROOTSYS/include/*.pri)  

Thank you very much for your assistance with the ROOT Manual. That typo has to be fixed shortly.  

Best Regards

                         Valeri Fine

Brookhaven National Laboratory

Upton, NY 11973, USA

Phone: +1 631 344 7806

Fax: +1 631 344 4206


-----Original Message-----

[] On Behalf Of Lee, Kerry T. (JSC-SF)[UHCL]
Sent: Wednesday, April 19, 2006 5:29 PM
Subject: [ROOT] ROOT Qt Manual Example  

Dear ROOT team,

I am using ROOT 5.11.02 on CentOS (linux) compiled with gcc 3.4.4.

I have tried to duplicate the Qt example in the manual. The output of qmake and make are below.

[kerrylee_at_jsc-sf-2148872 MyQButtonEx]$ qmake WARNING: Failure to find: Dict.cxx
[kerrylee_at_jsc-sf-2148872 MyQButtonEx]$ make g++ -c -pipe -Wall -W -O2 -g -pipe -m32 -march=i386 -mtune=pentium4
-I/usr/lib/qt-3.3/mkspecs/default -I. -I"/include"
-I"/home/root/gcc/5.11.00/root/include" -I/usr/lib/qt-3.3/include -o
TMyQButton.o TMyQButton.cxx
/home/root/gcc/5.11.00/root/bin/rootcint -f Dict.cxx -c
-DQT_VERSION=0x30000 -I/usr/lib/qt-3.3/mkspecs/default -I. -I"/include"
-I"/home/root/gcc/5.11.00/root/include" -I/usr/lib/qt-3.3/include
TMyQButton.h LinkDef.h
g++ -c -pipe -Wall -W -O2 -g -pipe -m32 -march=i386 -mtune=pentium4
-I/usr/lib/qt-3.3/mkspecs/default -I. -I"/include"
-I"/home/root/gcc/5.11.00/root/include" -I/usr/lib/qt-3.3/include -o
Dict.o Dict.cxx
rm -f
g++ -shared -Wl,-soname, -o TMyQButton.o Dict.o -L/usr/lib/qt-3.3/lib -L/lib -lGQt -lQtGui
-L/home/root/gcc/5.11.00/root/lib -lCore -lCint -lHist -lGraf -lGraf3d
-lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -lGui -pthread -lm
-ldl -rdynamic -lTable -lqt-mt

/usr/bin/ld: cannot find -lQtGui
collect2: ld returned 1 exit status
make: *** [] Error 1

I can omit -lQtGui from the last command and there are no errors, but I cannot load the created library into root. I have also searched for the libQtGui and it does not exist despite Qt being installed correctly.

Any help is appreciated.

Kerry Received on Thu Apr 20 2006 - 02:19:24 MEST

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