cannot find -lQt5

[fortunto2]

Hi, i install in AWS GPU with CUDA
https://gist.github.com/fortunto2/530a2b096d497f01dedabd4789fb84ce

and final error in make

[ 94%] Built target FaceAnalyser
Linking CXX executable ../../bin/FaceLandmarkImg
/usr/bin/ld: cannot find -lQt5::Core
/usr/bin/ld: cannot find -lQt5::Gui
/usr/bin/ld: cannot find -lQt5::Widgets
/usr/bin/ld: cannot find -lQt5::Test
/usr/bin/ld: cannot find -lQt5::Concurrent
/usr/bin/ld: cannot find -lQt5::OpenGL
collect2: error: ld returned 1 exit status
make[2]: *** [bin/FaceLandmarkImg] Error 1
make[1]: *** [exe/FaceLandmarkImg/CMakeFiles/FaceLandmarkImg.dir/all] Error 2

but Qt in system

ubuntu@ip-172-31-1-31:~/OpenFace/build$ apt-file search Qt5CoreConfig.cmake
qtbase5-dev: /usr/lib/x86_64-linux-gnu/cmake/Qt5Core/Qt5CoreConfig.cmake
ubuntu@ip-172-31-1-31:~/OpenFace/build$ qmake --version
QMake version 3.0
Using Qt version 5.2.1 in /usr/lib/x86_64-linux-gnu

qtchooser -print-env
QT_SELECT="default"
QTTOOLDIR="/usr/lib/x86_64-linux-gnu/qt5/bin"
QTLIBDIR="/usr/lib/x86_64-linux-gnu"

[TadasBaltrusaitis]

I have not tried to build it on AWS. I'm surprised it needs to link to Qt at all (unless it's an OpenCV dependency) as I don't use it internally as such. Is FaceLandmarkImg the only binary that has this issue?

[fortunto2]

there are other applications like also asked from /bin/...
I check in the evening, as now stoped instance on aws

on aws - Ubuntu 14

[Temigo]

I think OpenCV GUI highgui needs Qt. Which version of CMake are you using ?

[fortunto2]

@Temigo GCC 4.9

[PianoCat]

@fortunto2 Have u already fix this problem? I just find the same problem in my own project, it makes me crazy...

[PianoCat]

I got it fixed last night, thank u all the same.

[PapaMadeleine2022]

@PianoCat @fortunto2 getting the same problem. how do you solve it?
looking forward for your reply.

[dshahrokhian]

@PianoCat please share your solution so other people searching over the issue page can find it.

[PapaMadeleine2022]

@dshahrokhian @TadasBaltrusaitis I set the true path of libQt5Core.so.5, libQt5Gui.so.5, etc, in CMakeLists and cmake again. But it still shows error:

[ 96%] Linking CXX executable ../../bin/FaceLandmarkVid
/usr/bin/ld: cannot find -lQt5::Core
/usr/bin/ld: cannot find -lQt5::Gui
/usr/bin/ld: cannot find -lQt5::Widgets
/usr/bin/ld: cannot find -lQt5::Test
/usr/bin/ld: cannot find -lQt5::Concurrent
/usr/bin/ld: cannot find -lQt5::OpenGL
collect2: error: ld returned 1 exit status
exe/FaceLandmarkVid/CMakeFiles/FaceLandmarkVid.dir/build.make:154: recipe for target 'bin/FaceLandmarkVid' failed
make[2]: *** [bin/FaceLandmarkVid] Error 1
CMakeFiles/Makefile2:309: recipe for target 'exe/FaceLandmarkVid/CMakeFiles/FaceLandmarkVid.dir/all' failed
make[1]: *** [exe/FaceLandmarkVid/CMakeFiles/FaceLandmarkVid.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 97%] Linking CXX executable ../../bin/FaceLandmarkVidMulti
/usr/bin/ld: cannot find -lQt5::Core
/usr/bin/ld: cannot find -lQt5::Gui
/usr/bin/ld: cannot find -lQt5::Widgets
/usr/bin/ld: cannot find -lQt5::Test
/usr/bin/ld: cannot find -lQt5::Concurrent
/usr/bin/ld: cannot find -lQt5::OpenGL
collect2: error: ld returned 1 exit status
exe/FaceLandmarkVidMulti/CMakeFiles/FaceLandmarkVidMulti.dir/build.make:153: recipe for target 'bin/FaceLandmarkVidMulti' failed
make[2]: *** [bin/FaceLandmarkVidMulti] Error 1
CMakeFiles/Makefile2:365: recipe for target 'exe/FaceLandmarkVidMulti/CMakeFiles/FaceLandmarkVidMulti.dir/all' failed
make[1]: *** [exe/FaceLandmarkVidMulti/CMakeFiles/FaceLandmarkVidMulti.dir/all] Error 2
[ 98%] Linking CXX executable ../../bin/FeatureExtraction
/usr/bin/ld: cannot find -lQt5::Core
/usr/bin/ld: cannot find -lQt5::Gui
/usr/bin/ld: cannot find -lQt5::Widgets
/usr/bin/ld: cannot find -lQt5::Test
/usr/bin/ld: cannot find -lQt5::Concurrent
/usr/bin/ld: cannot find -lQt5::OpenGL
collect2: error: ld returned 1 exit status
exe/FeatureExtraction/CMakeFiles/FeatureExtraction.dir/build.make:154: recipe for target 'bin/FeatureExtraction' failed
make[2]: *** [bin/FeatureExtraction] Error 1
CMakeFiles/Makefile2:422: recipe for target 'exe/FeatureExtraction/CMakeFiles/FeatureExtraction.dir/all' failed
make[1]: *** [exe/FeatureExtraction/CMakeFiles/FeatureExtraction.dir/all] Error 2
[100%] Linking CXX executable ../../bin/FaceLandmarkImg
/usr/bin/ld: cannot find -lQt5::Core
/usr/bin/ld: cannot find -lQt5::Gui
/usr/bin/ld: cannot find -lQt5::Widgets
/usr/bin/ld: cannot find -lQt5::Test
/usr/bin/ld: cannot find -lQt5::Concurrent
/usr/bin/ld: cannot find -lQt5::OpenGL
collect2: error: ld returned 1 exit status
exe/FaceLandmarkImg/CMakeFiles/FaceLandmarkImg.dir/build.make:154: recipe for target 'bin/FaceLandmarkImg' failed
make[2]: *** [bin/FaceLandmarkImg] Error 1
CMakeFiles/Makefile2:252: recipe for target 'exe/FaceLandmarkImg/CMakeFiles/FaceLandmarkImg.dir/all' failed
make[1]: *** [exe/FaceLandmarkImg/CMakeFiles/FaceLandmarkImg.dir/all] Error 2
Makefile:129: recipe for target 'all' failed
make: *** [all] Error 2

however, it seems like it can compile 100% rather than 92% this time.

@fortunto2 how do you solve it?