Not able to compile Qt-Apps

[Thomas Baumann <me@tombee.net>]

Hi there,

I'm tring to install my new Debian-System (my first one). Everything is going 
quite fine, except that I am not able to compile any QT-Application (KDE as 
well). I searched the web all over for a couple of times, but I cannot find 
any solution ;((

My system's state is testing and I took KDE and Qt from download.kde.org. I've 
also installed the devel-packs.

Here's my dpkg -l | grep qt:
ii  libqt3         3.1.2-0woody1  Qt Library
ii  libqt3-headers 3.1.2-0woody1  Qt3 header files
ii  libqt3-mt      3.1.2-0woody1  Qt GUI Library (Threaded runtime version)
ii  libqt3-mt-dev  3.1.2-0woody1  Qt development files (Threaded)
ii  qt3-dev-tools  3.1.2-0woody1  Qt3 development tools
ii  qt3-doc        3.1.2-0woody1  Qt3 API documentation

When I run configure on any Qt-Application, it always complains about not 
finding Qt.

Here's a cut of my config.log:

  configure:21977: checking for Qt
  configure: 22045: /usr/share/qt3/include/qstyle.h
  taking that
  tried NO
  configure:22154: rm -rf SunWS_cache; g++ -o conftest -Wnon-virtual-dtor
  -Wno-long-long -Wundef -Wall -pedantic -W -Wpointer 
  -arith -Wmissing-prototypes -Wwrite-strings -ansi -D_XOPEN_SOURCE=500
  -D_BSD_SOURCE -Wcast-align -Wconversion -O2 -fno-exceptions -fno-check-new
  -I/usr/share/qt3/include -I/usr/X11R6/include  -DQT_THREAD_SUPPORT
  -D_REENTRANT -L/usr/share/qt3/lib
  -L/usr/share/qt3/lib -L/usr/X11R6/lib   conftest.cc  -lqt-mt -lpng -lz -lm
  -ljpeg -ldl  -lXext -lX11 -lSM -lICE  -lpthread 1>&5
  /tmp/ccZhliVQ.o(.text+0xe): In function `main':
  : undefined reference to `QString::null'
  /tmp/ccZhliVQ.o(.text+0x13): In function `main':
  : undefined reference to `QStyleFactory::create(QString const&)'
  /tmp/ccZhliVQ.o(.text+0x20): In function `main':
  : undefined reference to `QCursor::QCursor[in-charge](int)'
  /tmp/ccZhliVQ.o(.text+0x28): In function `main':
  : undefined reference to `QCursor::~QCursor [in-charge]()'
  collect2: ld returned 1 exit status
  configure:22157: $? = 1
  configure: failed program was:
  #include "confdefs.h"
  #include <qglobal.h>
  #include <qapplication.h>
  #include <qcursor.h>
  #include <qstylefactory.h>
  #include <private/qucomextra_p.h>
  #if ! (QT_VERSION >= 0x030100)
  #error 1
  #endif  

  int main() {
      (void)QStyleFactory::create(QString::null);
      QCursor c(Qt::WhatsThisCursor);
      return 0;
  }
  configure:22197: error: Qt (>= Qt 3.1.0) (library qt-mt) not found. Please
  check your installation!
  For more details about this problem, look at the end of config.log.
  Make sure that you have compiled Qt with thread support! 

I added /usr/share/qt3/lib to /etc/ld.so.conf and ran ldconfig, but the result 
is the same ;((

When I try to compile the conftest.cc on my own, I get the following:

  g++ -o conftest -Wnon-virtual-dtor -Wno-long-long -Wundef -Wall -pedantic -W
  -Wmissing-prototypes -Wwrite-strings -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE
  -Wcast-align -Wconversion -O2 -fno-exceptions -fno-check-new
  -I/usr/share/qt3/include -I/usr/X11R6/include -DQT_THREAD_SUPPORT
  -D_REENTRANT -L/usr/share/qt3/lib -L/usr/share/qt3/lib -L/usr/X11R6/lib
  conftest.cc -lqt-mt -lpng -lz -lm -ljpeg -ldl  -lXext -lX11 -lSM -lICE
  -lpthread

  conftest.cc:1:22: confdefs.h: No such file or directory

I couldn't find confdefs.h on my system, so i asked apt-file, which told me 
that pike-7.4.21 would bring that file. So I gave that a try too, which 
results with:

  g++ -o conftest -Wnon-virtual-dtor -Wno-long-long -Wundef -Wall -pedantic -W
  -Wmissing-prototypes -Wwrite-strings -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE
  -Wcast-align -Wconversion -O2 -fno-exceptions -fno-check-new
  -I/usr/share/qt3/include -I/usr/X11R6/include -I/usr/include/pike/7.4.21
  -DQT_THREAD_SUPPORT  -D_REENTRANT -L/usr/share/qt3/lib -L/usr/share/qt3/lib
  -L/usr/X11R6/lib conftest.cc -lqt-mt -lpng -lz -lm -ljpeg -ldl  -lXext -lX11
  -lSM -lICE  -lpthread
  /tmp/ccPogQN9.o(.text+0xe): In function `main':
  : undefined reference to `QString::null'
  /tmp/ccPogQN9.o(.text+0x13): In function `main':
  : undefined reference to `QStyleFactory::create(QString const&)'
  /tmp/ccPogQN9.o(.text+0x20): In function `main':
  : undefined reference to `QCursor::QCursor[in-charge](int)'
  /tmp/ccPogQN9.o(.text+0x28): In function `main':
  : undefined reference to `QCursor::~QCursor [in-charge]()'
  collect2: ld returned 1 exit status

Now I really do not have a clue of what's wrong. Maybe one of you can help me. 
I even wondered that there seems no one else to be, having this problem, as 
it is very common to compile Qt-Apps. Actually there are many problems with 
Qt, but ever single case could be fixed by installing some devel-deb's or 
finetuning ld... did I miss something????

So _please_ help me, because I am starting to lose fun installing my very new 
Debian ;((

Thanks a lot in advance,
bye, bye,
Tom