OpenCV with Qt used within a Qt Creator project with vs2012 compiler [SOLVED]

plaxik

Hi,

my project consists of two parts:

OpenCV 2.4.8 built with the following configurations: static lib, dynamic crt, with qt (changed the cmakelist.txt of highgui module such that mac processor is run); vs2012 compiler is used
Qt Creator project which includes the built opencv include-headers and staticlibs; vs2012 compiler is used to build a .dll

it's just a console application. no gui and no widgets are needed within the code. I only build openCV wit Qt support in order to use qt-fonts and to tackle the limited ascii character set of OpenCV (just the standard ascii character set is supported).

However, as soon as I try to use cv::fontQt() with the setup described above, I get the following errors within Qt Creator:

bq. opencv_highgui248d.lib(window_QT.obj):-1: Error: LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QCursor::QCursor(enum Qt::CursorShape)" (_imp [...]

There are 420 of them and each is almost of the same type. Only the part after the "public:" changes.

My .pro-File looks as follows:

@QT -= gui

TARGET = DicomServices
TEMPLATE = lib

DEFINES += DICOMSERVICES_LIBRARY
DEFINES += NOMINMAX

SOURCES += DicomNode.cpp
[...]
HEADERS += DicomNode.h
[...]

win32:LIBS += -L$$PWD/../../MergeTK/mc3lib/ -lws2_32
win32:LIBS += -L$$PWD/../../MergeTK/mc3lib/ -lmc3adv
win32:LIBS += -L$$PWD/../../MergeTK/mc3lib/ -lpicnm

CONFIG( debug, debug|release ) {
#debug
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lopencv_core248d
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lopencv_highgui248d
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lopencv_imgproc248d
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lopencv_features2d248d
#3d party
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lzlibd
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -llibjpegd
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -llibtiffd
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -llibpngd
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lIlmImfd
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -llibjasperd
} else {
#release
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lopencv_core248
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lopencv_highgui248
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lopencv_imgproc248
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lopencv_features2d248
#3d party
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lzlib
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -llibjpeg
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -llibtiff
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -llibpng
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -lIlmImf
win32:LIBS += -L$$PWD/../../OpenCV/staticlib/ -llibjasper
}

INCLUDEPATH += $$PWD/../../MergeTK/mc3inc
DEPENDPATH += $$PWD/../../MergeTK/mc3inc
INCLUDEPATH += $$PWD/../../OpenCV/include
DEPENDPATH += $$PWD/../../OpenCV/include@

Edit:

I included all other opencv-libs: still 420 errors
However, when I add the following to the .pro file, there is just one error messsage left:

@QT += widgets@

bq. opencv_highgui248d.lib(window_QT.obj):-1: Error: LNK2019: unresolved external symbol "__declspec(dllimport) char __cdecl QTest::keyToAscii(enum Qt::Key)" (_imp[...]

Has anybody made similar experiences and know how to get rid of all these error messages?
Is there another solution to 'remove' the 420 error messages than turning "widget" on?

I appreciate any kind of help!

SGaist

Hi and welcome to devnet,

No, it's the right solution, since you are linking to highgui, you'll need the widgets module.

For the last error, you are missing the test module.

plaxik

Ah, great. Thanks for the advice. All errors are gone :)

SGaist

You're welcome !

One other thing you can do:

@
SUFFIX=
win32 {
LIBS += -L$$PWD/../../OpenCV/staticlib/
CONFIG(debug, debug|release): SUFFIX=d
}

LIBS+= -lopencv_core248$$SUFFIX
-lopencv_highgui248$$SUFFIX
etc.
@

It'll make your pro file easier to read

plaxik

Awesome!

Thx :)