QtLeapMotion Library not building

RohitIti

Hello ,

I am facing issue building QtLeapMotionLibrary.
I am building using below configuration.

TEMPLATE = lib

TARGET = QtLeapMotion

DEFINES += QTLEAPMOTION_LIBRARY

CONFIG += dll

QT += qml quick

OBJECTS_DIR = tmp

MOC_DIR = tmp

#INCLUDEPATH += $$PWD/Leap/include

INCLUDEPATH +=C:\04_Qt\QtLeapMotionLibrary-master\QtLeapMotion\Leap\include

INCLUDEPATH += $$PWD/lib/x64
DEPENDPATH += $$PWD/lib/x64

INCLUDEPATH += $$PWD/lib/x86
DEPENDPATH += $$PWD/lib/x86

include (./QtLeapGlobal/QtLeapGlobal.pri)
include (./QtLeapDevice/QtLeapDevice.pri)
include (./QtLeapGestures/QtLeapGestures.pri)
include (./QtLeapTouch/QtLeapTouch.pri)

#win32: {

!contains(QMAKE_HOST.arch, x86_64) {

message("x86 build")

LIBS += $$PWD/Leap/x86/Leap.dll

} else {

message("x86_64 build")

LIBS += $$PWD/Leap/x64/Leap.dll

}

#}

win32: {
!contains(QMAKE_HOST.arch, x86_64) {
message("x86 build")
install_folder.files += $$PWD/Leap/x86/Leap.dll
LIBS += -L$$PWD/lib/x86/ -lLeap
} else {
message("x86_64 build")

LIBS += ./Leap/x64/Leapd.lib

    install_folder.files += $$PWD/Leap/x64/Leap.dll

install_folder.files += ./Leap/x64/Leapd.dll

    LIBS += -L$$PWD/lib/x64/ -lLeap
}

}

win32:DESTDIR = ./

Am always facing Undefined reference to all leap lib classes like hand, circle etc. Basically the library is not linking with above configuration. I have proper libs and header files placed in proper path.

Can you suggest any solution using Leap Motion with QT. ?

Thanks for help.

Pablo J. Rogina

@RohitIti said in QtLeapMotion Library not building:

QtLeapMotionLibrary

Are you following the README.md instructions from such library? Especially:

In order to run the examples, you have to download the Leap SDK. Then in QtLeapMotion create a Leap directory in which you'll copy the following directories from the LeapSDK : include x64 -> if on 64 bits architecture x86 -> if on 32 bits architecture

and this step as well:

Open QtLeapMotionLibrary.pro in QtCreator.

I don't know why you're creating another .pro file of your own, which seems to be mixing architectures...

INCLUDEPATH += $$PWD/lib/x64
DEPENDPATH += $$PWD/lib/x64

INCLUDEPATH += $$PWD/lib/x86
DEPENDPATH += $$PWD/lib/x86

RohitIti

Hello Pablo J. Rogina,

Thank you for your response. Yes i followed exact steps that is mentioned in "README.md instructions " .
But still i see linker error and there is always error while building .

I added below lines just to make sure it will try to refer or link without skipping.

INCLUDEPATH += $$PWD/lib/x64
DEPENDPATH += $$PWD/lib/x64

INCLUDEPATH += $$PWD/lib/x86
DEPENDPATH += $$PWD/lib/x86

Even without these lines the error remains same. not able to build the library.
I was having 1 doubt here. Do we have to build this only with MSVC compiler or Minfw will also work ?
Currently i am using Mingw.

SGaist

Hi,

If it's a C++ library you can't mix and match MSVC and MinGW.

RohitIti

Thank you SGaist . Let me try configuring MSVC for QT . I will update this topic after trying out.