Installing Qt4

[Greg2]

so as long as my PATH and QTDIR are set to Qt4 values

it should work then??

Yes, that is correct.

[grimx]

ok thanx

[grimx]

Well when i put /usr/lib/qt4 as QTDIR; qt4 and qt3 do not compile

when i set QTDIR to /usr/lib/qt3 only qt3 compiles

and my PATH does include /usr/local/Trolltech/Qt-4.3.3/bin

/usr/lib/qt3 etc..... shows up three times in my PATH var,

and i don't know y

Help

[Greg2]

Well when i put /usr/lib/qt4 as QTDIR; qt4 and qt3 do not compile

You don't/shouldn't have a /usr/lib/qt4, unless you have installed something from the repos. Because you chose to use the default install with ./configure.

For now you can simply do

PATH=$PATH:/usr/local/Trolltech/Qt-4.3.3/bin

then do

echo $PATH

to see what you have.

Then do

export QTDIR=/usr/local/Trolltech/Qt-4.3.3

then do

echo $QTDIR

to check that. If everything looks good, using the same terminal session, go to work with qt4.

It would make it easier for you if you renamed the Qt-4.3.3 directory to qt4.

 

I wouldn't suggest placing the 'export QTDIR' in your bash_profile, because it 'may' screw up your KDE desktop, however I'm not positive about this.

[grimx]

Greg2:

 

After setting up my env vars to this

PATH=$PATH:/usr/local/Trolltech/Qt-4.3.3/bin

export QTDIR=/usr/local/Trolltech/Qt-4.3.3

and in checking them they show up, fine

 

 

when i try to compile this source code with

qmake -project

qmake

make

//////////////////////////

#include <QApplication>

#include <QPushButton>

 

int main(int argc, char *argv[])

{

QApplication app(argc, argv);

 

QPushButton hello("Hello World");

hello.resize(100, 30);

hello.show();

return app.exec();

}

///////////////////////////

 

it get this error:

 

g++ -c -pipe -Wall -W -O2 -DQT_NO_DEBUG -I/usr/lib/qt3/mkspecs/default -I. -I. -I/usr/local/Trolltech/Qt-4.3.3/include -o FIRST.o FIRST.cpp

cc1plus: error: /usr/local/Trolltech/Qt-4.3.3/include: Permission denied

make: *** [FIRST.o] Error 1

 

so i tried changing owner and group on /usr/local/Trolltech/Qt-4.3.3/include

and /usr/local/Trolltech

and /usr/local/Trolltech/Qt-4.3.3

to "mylogin name"

because they all have (owner = root) (group = root) on those as well"

and try to recompile i get this

 

g++ -c -pipe -Wall -W -O2 -DQT_NO_DEBUG -I/usr/lib/qt3/mkspecs/default -I. -I. -I/usr/local/Trolltech/Qt-4.3.3/include -o FIRST.o FIRST.cpp

FIRST.cpp:1:24: error: QApplication: No such file or directory

FIRST.cpp:2:23: error: QPushButton: No such file or directory

FIRST.cpp: In function ‘int main(int, char**)’:

FIRST.cpp:6: error: ‘QApplication’ was not declared in this scope

FIRST.cpp:6: error: expected `;' before ‘app’

FIRST.cpp:8: error: ‘QPushButton’ was not declared in this scope

FIRST.cpp:8: error: expected `;' before ‘hello’

FIRST.cpp:9: error: ‘hello’ was not declared in this scope

FIRST.cpp:11: error: ‘app’ was not declared in this scope

FIRST.cpp: At global scope:

FIRST.cpp:4: warning: unused parameter ‘argc’

FIRST.cpp:4: warning: unused parameter ‘argv’

make: *** [FIRST.o] Error 1

Edited January 31, 2008 by grimx

[Greg2]

it get this error:

 

g++ -c -pipe -Wall -W -O2 -DQT_NO_DEBUG -I/usr/lib/qt3/mkspecs/default

You are tying to use qt3/mkspecs/default/(qt/qmake.conf-3.3.8), and it 'will not work' with qt4.

 

I would suggest that you check out the Trolltech/Qt tutorials and their forums for more info on this. I'm very sorry, but I do not have the time or skill to try to teach Qt programming here... I still use their documentation for my needs. :)