little problem with qt libs...

[Jens Zurheide]

Monday 05 November 2001 23:48 Dieter Mummenschanz
>> post the results from the ./configure to me and also the config.log .
>> regards, René
>
>I´ve send the config.log along with my last post. plz take a look at it.
>Maybe my qt-libs are bad because of some undefined references to some
> QString:: methodes.
>
>This is the part I believe causes the problem:
>
>...
>configure:5402: checking for Qt
>configure: 5464: /usr/lib/qt2/include/qstyle.h
>taking that
>configure:5563: rm -rf SunWS_cache; c++ -o conftest -O2 -fno-exceptions
>-fno-check-new -I/usr/lib/qt2/include -I/usr/X11R6/include  
> -L/usr/lib/qt2/lib -L/usr/X11R6/lib  conftest.C  -lqt -lpng -lz -lm
> -ljpeg  -lXext -lX11 -lSM -lICE  -lresolv 1>&5
>/tmp/ccGYS6jB.o: In function `main':
>/tmp/ccGYS6jB.o(.text+0x3e): undefined reference to `QString::shared_null'
>/tmp/ccGYS6jB.o(.text+0x71): undefined reference to
>`QIconView::QIconView(QWidget*, char const*, unsigned)'
>/tmp/ccGYS6jB.o(.text+0x81): undefined reference to
>`QIconView::setWordWrapIconText(bool)'
>/tmp/ccGYS6jB.o(.text+0x86): undefined reference to `QString::shared_null'
>/tmp/ccGYS6jB.o(.text+0xa5): undefined reference to
> `QString::setLatin1(char const*, int)'
>/tmp/ccGYS6jB.o(.text+0xba): undefined reference to `QString::shared_null'
>/tmp/ccGYS6jB.o(.text+0xc5): undefined reference to
>`QStringData::deleteSelf()'
>/tmp/ccGYS6jB.o(.text+0xd7): undefined reference to
>`QIconView::~QIconView()'
>/tmp/ccGYS6jB.o(.text+0xeb): undefined reference to `QString::shared_null'
>/tmp/ccGYS6jB.o(.text+0xf2): undefined reference to
>`QString::makeSharedNull()'
>/tmp/ccGYS6jB.o(.text+0xf9): undefined reference to
>`QString::makeSharedNull()'
>/usr/lib/qt2/lib/libqt.so: undefined reference to `__pure_virtual'
>collect2: ld returned 1 exit status

So this is a linking problem. This means that either the symbolic link of 
/usr/lib/qt2/lib/libqt.so points to an old version or the lib itself is 
"broken". Please verify with "ls -l /usr/lib/qt2/lib/libqt.so" to which 
library the link is pointing and if this is the correct/expected version. 
It might be interesting to recompile libqt yourself (after a make clean). 
The recommended configure parameters from README.qt-copy are
./configure -sm -gif -system-jpeg -no-opengl -kde -no-g++-exceptions -xft
where -xft if for anti-aliasing support if you have XFree-4.0.x.

Which version of gcc are you using? I am not an expert regarding compilers, 
but this information might be interesting for others to help you.

Jens

>configure: failed program was:
>#include "confdefs.h"
>#include <qglobal.h>
>#include <qapplication.h>
>#include <qevent.h>
>#include <qstring.h>
>#include <qstyle.h>
>#include <qiconview.h>
>#if ! (QT_VERSION >= 222)
>#error 1
>#endif
>
>int main() {
>    QStringList *t = new QStringList();
>    QIconView iv(0);
>    iv.setWordWrapIconText(false);
>    QString s;
>    s.setLatin1("Elvis is alive", 14);
>    int magnolia = QEvent::Speech; /* new in 2.2 beta2 */
>    return 0;
>}
>
>
>Dieter

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