[Qt-interest] static linking

[Linda Maria]

Hi all

I want to statically link my own libs, however, still dynamically linking
against Qt. When I do this I get undefined reference error. Well, it is
clear that the compiler is not finding my lib*somename*.a file, however, if
I compile my library dynamically the compiler has no problem finding *
somename*.dll file.

-I am working with QT 4.5
-I am working on Windows with Qt Creator

Example .pro files are as folow:

lib pro file:
QT -= gui

TARGET = hello_world_lib

TEMPLATE = lib

CONFIG += staticlib

DEFINES += HELLO_WORLD_LIB_LIBRARY

SOURCES += helloworld.cpp

HEADERS += helloworld.h\

hello_world_lib_global.h



app pro file:

TARGET = hello_world

TEMPLATE = app

INCLUDEPATH += ..\hello_world_lib

CONFIG += static

LIBS += -L..\hello_world_lib\debug -lhello_world_lib

TARGETDEPS += ..\hello_world_lib\debug\libhello_world_lib.a

SOURCES += main.cpp \

mainwindow.cpp \

helloworlddialog.cpp

HEADERS += mainwindow.h \

helloworlddialog.h

FORMS += mainwindow.ui \

helloworlddialog.ui \

helloworlddialog.ui



ld output is:

debug/mainwindow.o(.text+0x1bd): In function
`ZN10HelloWorld10MainWindowC2EP7QWidget':

C:/Documents and Settings/es030699/My
Documents/Qt/hello_world/mainwindow.cpp:15: undefined reference to
`_imp___ZN13HelloWorldLib10HelloWorld10getMessageEv'

debug/mainwindow.o(.text+0x3cb): In function
`ZN10HelloWorld10MainWindowC1EP7QWidget':

C:/Documents and Settings/es030699/My
Documents/Qt/hello_world/mainwindow.cpp:15: undefined reference to
`_imp___ZN13HelloWorldLib10HelloWorld10getMessageEv'

collect2: ld returned 1 exit status

mingw32-make.exe[1]: *** [debug\hello_world.exe] Error 1

C:\MinGW\bin\mingw32-make.exe: *** [debug] Error 2

Exited with code 2.

Error while building project hello_world

When executing build step 'Make'



Notice the line

CONFIG += staticlib

in the lib pro file tellst the compiler to create libhello_world_lib.a to
statically link agains, and not to create hello_world_lib.dll. I thought the
compiler should automatically find out that only a static library is
provided and link against it.



Can someone please help me with this?

Thanks,

Linda Maria
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