library in .pro file for qt

Hi all,

I'm relative newbee in QtDeveloppement with c++ on windows.

I' m working on project with integration of videoInput library and Qt4 gui together, but i have some pbm to include this lib in the .pro file for compiling :
I'm using mingw32 and Qt4.43.
this is mi simple .pro file :

Code:

---

TEMPLATE = app
TARGET =
DEPENDPATH += .
 
# Input
HEADERS += webcamapp.h
FORMS += winCam.ui
SOURCES += main.cpp webcamapp.cpp
 
INCLUDEPATH += "C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp\include"
LIBS += -L"C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp"
 
LIBS += -videoInputLib.a

---

i'm testing with -lvideoInputLib to but the lib is not find...!!!

the library is in an directory : videoInputLib.a with an other dir for include .h

If i use this library in codeblocks with the same mingw without Qt4 project there is no pbm....

is there a special command in .pro file to include lib in .a format and not .lib ?
(i can import some other lib if it's in this format from other library).

the make process return this error :

Code:

---

mingw32-make -f Makefile.Debug
mingw32-make[1]: Entering directory `D:/production/worklab/cpp/progetTest/webcam
QTV'
g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-rel
oc -mthreads -Wl -Wl,-subsystem,windows -o debug\webcamQTV.exe debug/main.o debu
g/webcamapp.o  -L"c:\Qt\4.4.3\lib" -lmingw32 -lqtmaind "-LC:\Program Files\video
Input01995\compiledLib\compiledByDevCpp" -videoInputLib.a -lQtGuid4 -lQtCored4
g++: unrecognized option `-videoInputLib.a'
debug/webcamapp.o: In function `_ZN9WebCamAppC2Ev':
D:/production/worklab/cpp/progetTest/webcamQTV/webcamapp.cpp:15: undefined refer
ence to `videoInput::listDevices(bool)'
debug/webcamapp.o: In function `_ZN9WebCamAppC1Ev':
D:/production/worklab/cpp/progetTest/webcamQTV/webcamapp.cpp:15: undefined refer
ence to `videoInput::listDevices(bool)'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [debug\webcamQTV.exe] Error 1
mingw32-make[1]: Leaving directory `D:/production/worklab/cpp/progetTest/webcamQ
TV'
mingw32-make: *** [debug] Error 2

---

Sorry for this poor indication, but i reallyy need to resolve this pb m .

thank's a lot.

Get rid of the dash before the name of the library. It should be:

Code:

---

LIBS+=videoInputLib.a

---

hi wysoata,

thank's for your reply....but this don't work....the library is don't find by gcc++.

and i have chekking one more time that the path is the good one.....
i don'k know where to find a way to fixe that

is it the same error coming again? if not, please post it

No, this time the library is don't find at all :

Code:

---

g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-rel
oc -mthreads -Wl -Wl,-subsystem,windows -o debug\webcamQTV.exe debug/main.o debu
g/webcamapp.o debug/moc_webcamapp.o  -L"c:\Qt\4.4.3\lib" -lmingw32 -lqtmaind "-L
C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp" videoInputLib.a -
lQtGuid4 -lQtCored4
g++: videoInputLib.a: No such file or directory
mingw32-make[1]: *** [debug\webcamQTV.exe] Error 1
mingw32-make[1]: Leaving directory `D:/production/worklab/cpp/progetTest/webcamQ
TV'
mingw32-make: *** [debug] Error 2

---

Code:

---

LIBS += -L"C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp"
 
LIBS += -videoInputLib.a

---

first statement should not be LIBS += , but DEPENDPATH += , cuz u r providing an extra path to be searched..check if it works with this

Quote:

---

Originally Posted by talk2amulya

Code:

---

LIBS += -L"C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp"
 
LIBS += -videoInputLib.a

---

first statement should not be LIBS += , but DEPENDPATH += , cuz u r providing an extra path to be searched..check if it works with this

---

also while giving library name:
LIBS += -lvideoInputLib.a
should be used

....i' modified the .pro this way :

Code:

---

INCLUDEPATH += "C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp\include"
 
DEPENDPATH += -L"C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp"
 
LIBS +=-videoInputLib.a

---

but it give me allway an error :

Code:

---

g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-rel
oc -mthreads -Wl -Wl,-subsystem,windows -o debug\webcamQTV.exe debug/main.o debu
g/webcamapp.o debug/moc_webcamapp.o  -L"c:\Qt\4.4.3\lib" -lmingw32 -lqtmaind -vi
deoInputLib.a -lQtGuid4 -lQtCored4
g++: unrecognized option `-videoInputLib.a'
debug/webcamapp.o: In function `_ZN9WebCamAppC2Ev':
D:/production/worklab/cpp/progetTest/webcamQTV/webcamapp.cpp:15: undefined refer
ence to `videoInput::listDevices(bool)'
debug/webcamapp.o: In function `_ZN9WebCamAppC1Ev':
D:/production/worklab/cpp/progetTest/webcamQTV/webcamapp.cpp:15: undefined refer
ence to `videoInput::listDevices(bool)'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [debug\webcamQTV.exe] Error 1
mingw32-make[1]: Leaving directory `D:/production/worklab/cpp/progetTest/webcamQ
TV'
mingw32-make: *** [debug] Error 2

---

did you try
LIBS += -lvideoInputLib.a
??

yes, i try this differents options :

LIBS +=-videoInputLib.a (=unrocognized option)

LIBS +=-lvideoInputLib.a (=can not find )

LIBS +=videoInputLib.a (=unrocognized option)

LIBS +=-videoInputLib (=unrocognized option)

LIBS +=--lvideoInputLib (=unrocognized option)

...

Quote:

---

Originally Posted by fbmfbm

yes, i try this differents options :

LIBS +=-videoInputLib.a (=unrocognized option)

LIBS +=-lvideoInputLib.a (=can not find )

LIBS +=videoInputLib.a (=unrocognized option)

LIBS +=-videoInputLib (=unrocognized option)

LIBS +=--lvideoInputLib (=unrocognized option)

...

---

it says cannot find for -lvideoInputLib.a because the path could be wrong somewhere?
try:
LIBS += -L/path/to/lib -lvideoInputLib.a

Code:

---

win32:LIBS += C:/Program Files/videoInput01995/compiledLib/compiledByDevCpp/videoInputLib.a

---

this should work!

...hum, with this it seam that the path is ok...but it's like the library is not active...no ??

Code:

---

g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-rel
oc -mthreads -Wl -Wl,-subsystem,windows -o debug\webcamQTV.exe debug/main.o debu
g/webcamapp.o debug/moc_webcamapp.o  -L"c:\Qt\4.4.3\lib" -lmingw32 -lqtmaind "-L
C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp-lvideoInputLib.a"
-lQtGuid4 -lQtCored4
debug/webcamapp.o: In function `_ZN9WebCamAppC2Ev':
D:/production/worklab/cpp/progetTest/webcamQTV/webcamapp.cpp:14: undefined refer
ence to `videoInput::videoInput()'
D:/production/worklab/cpp/progetTest/webcamQTV/webcamapp.cpp:15: undefined refer
ence to `videoInput::listDevices(bool)'
debug/webcamapp.o: In function `_ZN9WebCamAppC1Ev':
D:/production/worklab/cpp/progetTest/webcamQTV/webcamapp.cpp:14: undefined refer
ence to `videoInput::videoInput()'
D:/production/worklab/cpp/progetTest/webcamQTV/webcamapp.cpp:15: undefined refer
ence to `videoInput::listDevices(bool)'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [debug\webcamQTV.exe] Error 1
mingw32-make[1]: Leaving directory `D:/production/worklab/cpp/progetTest/webcamQ
TV'
mingw32-make: *** [debug] Error 2

---

did u try what i mentioned.. if that doesnt work, then maybe there is some issue with the .a library inclusion..although that seems frivilous..cuz mingw should recognize that

Your'r right.....i don't see your last post.

that's the way. I modified my .pro like that ( and include some reference to directshow libs i need ):

Code:

---

TEMPLATE = app
TARGET =
 
 
# Input
HEADERS += webcamapp.h
FORMS += winCam.ui
SOURCES += main.cpp webcamapp.cpp
 
INCLUDEPATH += "C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp\include"\
    "C:\Program Files\videoInput01995\libs\DShow\include"
 
LIBS +="C:\Program Files\videoInput01995\compiledLib\compiledByDevCpp\videoInputLib.a"
 
LIBS +=-L"C:\Program Files\videoInput01995\libs\DShow\lib"\
        -lddraw\
        -ldxguid\
        -lole32\
        -loleaut32\
        -lstrmbasd\
        -lstrmbase\
        -lstrmiids\
        -luuid

---

and all is now compiling ok !!

thank's for your help and patience !

well, if u like what i did, u can consider clicking on that little shining, lirking in the dark, "thanks" button :)

i do it and say "thank's a lot" to ;))

fbm

i tried also the program above to compile my project which also use videoinput, ths is my .pro file

INCLUDEPATH += "C:\Program Files\videoInput0.1995\videoInput0.1995\compiledLi b\compiledByDevCpp \include"
INCLUDEPATH += "C:\Program Files\videoInput0.1995\videoInput0.1995\libs\DShow \include"

LIBS += "C:\OpenCV\lib\videoInput.lib"
LIBS += "C:\Program Files\videoInput0.1995\videoInput0.1995\compiledLi b\compiledByDevCpp\videoInputLib.a"

LIBS +="C:\Program Files\videoInput0.1995\videoInput0.1995\videoInput SrcAndDemos\libs\DShow\lib\ddraw.lib"
LIBS +="C:\Program Files\videoInput0.1995\videoInput0.1995\videoInput SrcAndDemos\libs\DShow\lib\dxguid.lib"
LIBS +="C:\Program Files\videoInput0.1995\videoInput0.1995\videoInput SrcAndDemos\libs\DShow\lib\ole32.lib"
LIBS +="C:\Program Files\videoInput0.1995\videoInput0.1995\videoInput SrcAndDemos\libs\DShow\lib\oleaut32.lib"
LIBS +="C:\Program Files\videoInput0.1995\videoInput0.1995\videoInput SrcAndDemos\libs\DShow\lib\strmbasd.lib"
LIBS +="C:\Program Files\videoInput0.1995\videoInput0.1995\videoInput SrcAndDemos\libs\DShow\lib\strmbase.lib"
LIBS +="C:\Program Files\videoInput0.1995\videoInput0.1995\videoInput SrcAndDemos\libs\DShow\lib\strmiids.lib"
LIBS +="C:\Program Files\videoInput0.1995\videoInput0.1995\videoInput SrcAndDemos\libs\DShow\lib\uuid.lib"

but after i compile it this error come out:
error: collect2: ld returned 1 exit status

could someone help me?

It seems you are mixing MinGW and MSVC libraries.