QT and my own shared library, undefined reference to ...

[webquinty]

Hello,

I have my own shared library and when I compile my C application with flag -lLEICAN (it is my library), there is not problem.

Now I have a QT application, and here there is a problem.
I have compiled QT application with the same flags, but g++ return me a error:

mydialog.cpp:(.text+0x3d1): undefined reference to........

Any advice???

Best regards.

[jpn]

You managed to cut the interesting part out of the error message. Could you paste the .pro file, linker command and the complete error?

[webquinty]

OK!!!

app.pro

TEMPLATE = app
INCLUDEPATH += .

# Input
HEADERS += global.h mydialog.h mydialog.ui.h taskman.h touchpad.h touchpad.ui.h
SOURCES += main.cpp mydialog.cpp taskman.c touchpad.cpp

Output of compiler

john@Linux-D530:~/workspace/RT_QT_v0.2> make
g++ -c -pipe -DQWS -fno-exceptions -fno-rtti -m32 -mtune=geode -O2 -DQT_NO_DEBUG -DQT_SHARED -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/mkspecs/default -I. -I. -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/include -o main.o main.cpp

g++ -c -pipe -DQWS -fno-exceptions -fno-rtti -m32 -mtune=geode -O2 -DQT_NO_DEBUG -DQT_SHARED -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/mkspecs/default -I. -I. -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/include -o mydialog.o mydialog.cpp

gcc -c -pipe -m32 -mtune=geode -O2 -DQT_NO_DEBUG -DQT_SHARED -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/mkspecs/default -I. -I. -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/include -o taskman.o taskman.c

g++ -c -pipe -DQWS -fno-exceptions -fno-rtti -m32 -mtune=geode -O2 -DQT_NO_DEBUG -DQT_SHARED -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/mkspecs/default -I. -I. -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/include -o touchpad.o touchpad.cpp
In file included from touchpad.cpp:24:
/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/include/qwindowsystem_qws.h:211: warning: ‘typedef’ was ignored in this declaration
/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/include/qwindowsystem_qws.h:216: warning: ‘typedef’ was ignored in this declaration
/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/bin/moc mydialog.h -o moc_mydialog.cpp

g++ -c -pipe -DQWS -fno-exceptions -fno-rtti -m32 -mtune=geode -O2 -DQT_NO_DEBUG -DQT_SHARED -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/mkspecs/default -I. -I. -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/include -o moc_mydialog.o moc_mydialog.cpp
/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/bin/moc touchpad.h -o moc_touchpad.cpp

g++ -c -pipe -DQWS -fno-exceptions -fno-rtti -m32 -mtune=geode -O2 -DQT_NO_DEBUG -DQT_SHARED -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/mkspecs/default -I. -I. -I/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/include -o moc_touchpad.o moc_touchpad.cpp

g++ -m32 -mtune=geode -Wl,-rpath,/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/lib -o RT_QT_v0.2 main.o mydialog.o taskman.o touchpad.o moc_mydialog.o moc_touchpad.o -L/home/john/GeodeProject/Qt-embedded/qt-embedded-free-3.3.6/lib -lqte -lrt -lLEICIF -lpthread

mydialog.o: In function `MyDialog::CanActivate()':
mydialog.cpp:(.text+0x48a): undefined reference to `LEICANstop(int)'
collect2: ld returned 1 exit status
make: *** [RT_QT_v0.2] Error 1

In taskman.c there is other LEICANstop() function but in this case there is not problem.
In both files, taskman.c and mydialog.cpp there is a inlcude for lib, libLEICIF.h

Thank you

[jpn]

http://doc.trolltech.com/3.3/qmake-manual-8.html#LIBS

[webquinty]

http://doc.trolltech.com/3.3/qmake-manual-8.html#LIBS

Thank you, I am going to read this document.

Best regards