Including c++ libraries (opencv) on remote build raspberry pi - c++

I'm stuck trying to get some openCV code working on my raspberry pi. I'm almost certain the problem is caused by the linker not knowing where the openCV library files are but I'm unfamiliar with both Linux and Netbeans so I'm in a bit of a pickle!
So, in short, my set-up is: attempting to build my code to my raspberryPi via remote C++ build host (G++). I am writing my code in Netbeans.
The builds worked fine up until the point I wrote two new classes using the "opencv2/core/core.hpp"
Now, when I attempt to build, I get the following error/s:
Copying project files to /home/pi/.netbeans/remote/192.168.1.99/desktop-g6lev01-Windows-x86_64 at pi#192.168.1.99
Building project files list...
Checking directory structure...
Checking previously uploaded files...
Checking links...
Uploading changed files:
Zipping 1 changed files...
Uploading zip to pi#192.168.1.99...
Unzipping changed files...
Checking exec permissions...
Uploading changed files finished successfully.
cd '/home/pi/.netbeans/remote/192.168.1.99/desktop-g6lev01-Windows-x86_64/E/Work/RasberryPi/Code/Raspberrypi_Test'
/usr/bin/make -f Makefile CONF=Release
"/usr/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory '/home/pi/.netbeans/remote/192.168.1.99/desktop-g6lev01-Windows-x86_64/E/Work/RasberryPi/Code/Raspberrypi_Test'
"/usr/bin/make" -f nbproject/Makefile-Release.mk IOTestBuild
make[2]: Entering directory '/home/pi/.netbeans/remote/192.168.1.99/desktop-g6lev01-Windows-x86_64/E/Work/RasberryPi/Code/Raspberrypi_Test'
g++ -o IOTestBuild build/Release/GNU-Linux/CommsManager.o build/Release/GNU-Linux/ImageManager.o build/Release/GNU-Linux/Server.o build/Release/GNU-Linux/main.o -L../../opencv- -lwiringPi -opencv
build/Release/GNU-Linux/ImageManager.o: In function `ImageManager::getStoredImg()':
ImageManager.cpp:(.text+0xcc): undefined reference to `cv::Mat::copySize(cv::Mat const&)'
build/Release/GNU-Linux/ImageManager.o: In function `ImageManager::ImageManager()':
ImageManager.cpp:(.text+0x134): undefined reference to `cv::VideoCapture::VideoCapture()'
ImageManager.cpp:(.text+0x1c0): undefined reference to `cv::Mat::deallocate()'
ImageManager.cpp:(.text+0x288): undefined reference to `cv::Mat::deallocate()'
ImageManager.cpp:(.text+0x2b8): undefined reference to `cv::fastFree(void*)'
ImageManager.cpp:(.text+0x2c0): undefined reference to `cv::VideoCapture::VideoCapture()'
ImageManager.cpp:(.text+0x32c): undefined reference to `cv::VideoCapture::~VideoCapture()'
ImageManager.cpp:(.text+0x344): undefined reference to `cv::Mat::copySize(cv::Mat const&)'
ImageManager.cpp:(.text+0x350): undefined reference to `cv::Ptr<CvCapture>::delete_obj()'
ImageManager.cpp:(.text+0x358): undefined reference to `cv::fastFree(void*)'
ImageManager.cpp:(.text+0x36c): undefined reference to `cv::VideoCapture::~VideoCapture()'
ImageManager.cpp:(.text+0x388): undefined reference to `cv::VideoCapture::~VideoCapture()'
build/Release/GNU-Linux/ImageManager.o: In function `ImageManager::~ImageManager()':
ImageManager.cpp:(.text+0x3a0): undefined reference to `cv::VideoCapture::~VideoCapture()'
ImageManager.cpp:(.text+0x404): undefined reference to `cv::fastFree(void*)'
ImageManager.cpp:(.text+0x414): undefined reference to `cv::Mat::deallocate()'
build/Release/GNU-Linux/ImageManager.o: In function `ImageManager::getRawImg(cv::Mat*)':
ImageManager.cpp:(.text+0x43c): undefined reference to `cv::VideoCapture::open(int)'
ImageManager.cpp:(.text+0x450): undefined reference to `cv::VideoCapture::operator>>(cv::Mat&)'
ImageManager.cpp:(.text+0x494): undefined reference to `cv::VideoCapture::release()'
build/Release/GNU-Linux/ImageManager.o: In function `ImageManager::updateFrame()':
ImageManager.cpp:(.text+0x5f0): undefined reference to `cv::Mat::copySize(cv::Mat const&)'
ImageManager.cpp:(.text+0x67c): undefined reference to `cv::fastFree(void*)'
ImageManager.cpp:(.text+0x6b8): undefined reference to `cv::Mat::deallocate()'
ImageManager.cpp:(.text+0x6c4): undefined reference to `cv::Mat::deallocate()'
build/Release/GNU-Linux/ImageManager.o: In function `cv::Mat::~Mat()':
ImageManager.cpp:(.text._ZN2cv3MatD2Ev[_ZN2cv3MatD5Ev]+0x68): undefined reference to `cv::fastFree(void*)'
ImageManager.cpp:(.text._ZN2cv3MatD2Ev[_ZN2cv3MatD5Ev]+0x74): undefined reference to `cv::Mat::deallocate()'
collect2: error: ld returned 1 exit status
nbproject/Makefile-Release.mk:65: recipe for target 'IOTestBuild' failed
make[2]: *** [IOTestBuild] Error 1
make[2]: Leaving directory '/home/pi/.netbeans/remote/192.168.1.99/desktop-g6lev01-Windows-x86_64/E/Work/RasberryPi/Code/Raspberrypi_Test'
nbproject/Makefile-Release.mk:62: recipe for target '.build-conf' failed
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory '/home/pi/.netbeans/remote/192.168.1.99/desktop-g6lev01-Windows-x86_64/E/Work/RasberryPi/Code/Raspberrypi_Test'
nbproject/Makefile-impl.mk:39: recipe for target '.build-impl' failed
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 701ms)
Any ideas?
I'm sure I just need to point the linker to the appropriate libs but I've no idea how to specify that relative path when using a build host.
Regards
Guy

Related

QT GStreamer Windows linker problems

I'm trying to compile and run the qml-sink example which is provided inside the gstreamer-good-plugin (QT Example). But currently I get a lot of undefined reference errors during the compile time. It seems that the linker does not link the libraries correctly.
I have checked the list of linked libraries and from my point of view all needed libs are listed.
E.g. gst_object_ref, gst_init, ... are undefined.
My setup:
Windows 10
Qt 5.11
Gstreamer 1.0
Gstremer devel 1.0
Gstreamer plugin good
Installed GStreamer version from here: GStreamer Download => gstreamer-1.0-devel-x86_64-1.14.3.msi and gstreamer-1.0-x86_64-1.14.3.msi
Can anyone please help me, how I can solve this problem?
Errortrace:
"C:\Program Files\CMake\bin\cmake.exe" --build . --target all
"C:\Program Files\CMake\bin\cmake.exe" -HC:\gst-plugins-good-1.14.4\tests\examples\qt\qmlsink -BC:\gst-plugins-good-1.14.4\tests\examples\qt\build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe --check-build-system CMakeFiles\Makefile.cmake 0
"C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_start C:\gst-plugins-good-1.14.4\tests\examples\qt\build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe\CMakeFiles C:\gst-plugins-good-1.14.4\tests\examples\qt\build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe\CMakeFiles\progress.marks
D:/Qt/Tools/mingw530_32/bin/mingw32-make.exe -f CMakeFiles\Makefile2 all
mingw32-make.exe[1]: Entering directory 'C:/gst-plugins-good-1.14.4/tests/examples/qt/build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe'
D:/Qt/Tools/mingw530_32/bin/mingw32-make.exe -f CMakeFiles\qml-example.dir\build.make CMakeFiles/qml-example.dir/depend
mingw32-make.exe[2]: Entering directory 'C:/gst-plugins-good-1.14.4/tests/examples/qt/build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe'
"C:\Program Files\CMake\bin\cmake.exe" -E cmake_depends "MinGW Makefiles"
C:\gst-plugins-good-1.14.4\tests\examples\qt\qmlsink C:\gst-plugins-good-1.14.4\tests\examples\qt\qmlsink C:\gst-plugins-good-1.14.4\tests\examples\qt\build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe
C:\gst-plugins-good-1.14.4\tests\examples\qt\build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe C:\gst-plugins-good-1.14.4\tests\examples\qt\build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe\CMakeFiles\qml-example.dir\DependInfo.cmake --color=
mingw32-make.exe[2]: Leaving directory 'C:/gst-plugins-good-1.14.4/tests/examples/qt/build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe'
D:/Qt/Tools/mingw530_32/bin/mingw32-make.exe -f CMakeFiles\qml-example.dir\build.make CMakeFiles/qml-example.dir/build
mingw32-make.exe[2]: Entering directory 'C:/gst-plugins-good-1.14.4/tests/examples/qt/build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe'
[ 25%] Linking CXX executable qml-example.exe
"C:\Program Files\CMake\bin\cmake.exe" -E cmake_link_script CMakeFiles\qml-example.dir\link.txt --verbose=1
"C:\Program Files\CMake\bin\cmake.exe" -E remove -f CMakeFiles\qml-example.dir/objects.a
D:\Qt\Tools\mingw530_32\bin\ar.exe cr CMakeFiles\qml-example.dir/objects.a #CMakeFiles\qml-example.dir\objects1.rsp
D:\Qt\Tools\mingw530_32\bin\g++.exe -Wl,--whole-archive CMakeFiles\qml-example.dir/objects.a -Wl,--no-whole-archive -o qml-example.exe -Wl,--out-implib,libqml-example.dll.a -Wl,--major-image-version,0,--minor-image-version,0
#CMakeFiles\qml-example.dir\linklibs.rsp
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x2b): undefined reference to `gst_object_ref'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x87): undefined reference to `gst_object_unref'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0xa7): undefined reference to `operator delete(void*)'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0xc8): undefined reference to `operator delete(void*)'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0xf3): undefined reference to `gst_element_set_state'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x150): undefined reference to `gst_init'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x17d): undefined reference to `gst_pipeline_new'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x194): undefined reference to `gst_element_factory_make'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x1ab): undefined reference to `gst_element_factory_make'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x1c2): undefined reference to `gst_element_factory_make'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x203): undefined reference to `g_assertion_message_expr'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x208): undefined reference to `gst_bin_get_type'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x217): undefined reference to `g_type_check_instance_cast'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x23e): undefined reference to `gst_bin_add_many'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x25f): undefined reference to `gst_element_link_many'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x37f): undefined reference to `g_assertion_message_expr'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x3a1): undefined reference to `g_object_set'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x3ad): undefined reference to `operator new(unsigned int)'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x3f6): undefined reference to `gst_element_set_state'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x401): undefined reference to `gst_object_unref'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x41e): undefined reference to `gst_deinit'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x467): undefined reference to `operator delete(void*)'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text$_ZN5QListIP7QObjectE13detach_helperEi[__ZN5QListIP7QObjectE13detach_helperEi]+0x8c): undefined reference to `__cxa_begin_catch'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text$_ZN5QListIP7QObjectE13detach_helperEi[__ZN5QListIP7QObjectE13detach_helperEi]+0xa3): undefined reference to `__cxa_rethrow'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.text$_ZN5QListIP7QObjectE13detach_helperEi[__ZN5QListIP7QObjectE13detach_helperEi]+0xaa): undefined reference to `__cxa_end_catch'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.rdata$_ZTI10SetPlaying[__ZTI10SetPlaying]+0x0): undefined reference to `vtable for __cxxabiv1::__si_class_type_info'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.rdata$_ZTI9QRunnable[__ZTI9QRunnable]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.eh_frame+0x13): undefined reference to `__gxx_personality_v0'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.eh_frame$_ZN5QListIP7QObjectED1Ev+0x13): undefined reference to `__gxx_personality_v0'
CMakeFiles\qml-example.dir/objects.a(main.cpp.obj):main.cpp:(.eh_frame$_ZN5QListIP7QObjectE13detach_helperEi+0x13): undefined reference to `__gxx_personality_v0'
CMakeFiles\qml-example.dir/objects.a(qrc_qml.cpp.obj):qrc_qml.cpp:(.eh_frame+0x8b): undefined reference to `__gxx_personality_v0'
collect2.exe: error: ld returned 1 exit status
mingw32-make.exe[2]: *** [qml-example.exe] Error 1
mingw32-make.exe[1]: *** [CMakeFiles/qml-example.dir/all] Error 2
CMakeFiles\qml-example.dir\build.make:112: recipe for target 'qml-example.exe' failed
mingw32-make.exe[2]: Leaving directory 'C:/gst-plugins-good-1.14.4/tests/examples/qt/build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe'
CMakeFiles\Makefile2:66: recipe for target 'CMakeFiles/qml-example.dir/all' failed
mingw32-make.exe[1]: Leaving directory 'C:/gst-plugins-good-1.14.4/tests/examples/qt/build-qmlsink-Desktop_Qt_5_11_1_MinGW_32bit-Vorgabe'
Makefile:82: recipe for target 'all' failed
mingw32-make.exe: *** [all] Error 2
It looks like you're building for windows. The only way I've compiled the qml plugin on windows is using qmake using the provided .pro file. My experiments with compiling using the mingw toolchain provided by Qt were unsuccessful due to mismatching C++ ABI's between GStreamer and Qt. I ended up using MSVC/Visual Studio for compiling instead.
The undefined references to g_/gst_ probably means you don't have pkg-config setup correctly on your system. pkg-config.exe --modversion gstreamer-1.0 Should output the version of GStreamer you installed.
Where did you download GStreamer from? What GStreamer version exactly? Did you download binaries or did you compile it yourself?

Trying to install qt-pods on windows

Im trying to install qt-pods on windows.
I downloaded the qt-pods package from github to my pc.
then i went into the folder and tried to run qmake && make.
the qmake succeed with no errors (i did it also alone for checking) but the 'make' threw me the following errors:
...a lot of errors like this...
F:\Users\matan_000\Documents\Programming\c++-libraries\qt-pods\qt-pods-core\release/libqt-pods-core.a(moc_podmanager.o):moc_podmanager.cpp:(.text$_ZN10PodManagerD0Ev[_ZN10PodManagerD0Ev]+0x14): undefined reference to `__imp__ZN7QObjectD2Ev'
F:\Users\matan_000\Documents\Programming\c++-libraries\qt-pods\qt-pods-core\release/libqt-pods-core.a(moc_podmanager.o):moc_podmanager.cpp:(.text.startup+0x3): undefined reference to `__imp__ZN7QObject16staticMetaObjectE'
F:\Users\matan_000\Documents\Programming\c++-libraries\qt-pods\qt-pods-core\release/libqt-pods-core.a(moc_podmanager.o):moc_podmanager.cpp:(.rdata$_ZTV10PodManager[_ZTV10PodManager]+0x38): undefined reference to `QObject::event(QEvent*)'
F:\Users\matan_000\Documents\Programming\c++-libraries\qt-pods\qt-pods-core\release/libqt-pods-core.a(moc_podmanager.o):moc_podmanager.cpp:(.rdata$_ZTV10PodManager[_ZTV10PodManager]+0x40): undefined reference to `QObject::eventFilter(QObject*, QEvent*)'
F:\Users\matan_000\Documents\Programming\c++-libraries\qt-pods\qt-pods-core\release/libqt-pods-core.a(moc_podmanager.o):moc_podmanager.cpp:(.rdata$_ZTV10PodManager[_ZTV10PodManager]+0x48): undefined reference to `QObject::timerEvent(QTimerEvent*)'
F:\Users\matan_000\Documents\Programming\c++-libraries\qt-pods\qt-pods-core\release/libqt-pods-core.a(moc_podmanager.o):moc_podmanager.cpp:(.rdata$_ZTV10PodManager[_ZTV10PodManager]+0x50): undefined reference to `QObject::childEvent(QChildEvent*)'
F:\Users\matan_000\Documents\Programming\c++-libraries\qt-pods\qt-pods-core\release/libqt-pods-core.a(moc_podmanager.o):moc_podmanager.cpp:(.rdata$_ZTV10PodManager[_ZTV10PodManager]+0x58): undefined reference to `QObject::customEvent(QEvent*)'
F:\Users\matan_000\Documents\Programming\c++-libraries\qt-pods\qt-pods-core\release/libqt-pods-core.a(moc_podmanager.o):moc_podmanager.cpp:(.rdata$_ZTV10PodManager[_ZTV10PodManager]+0x60): undefined reference to `QObject::connectNotify(QMetaMethod const&)'
F:\Users\matan_000\Documents\Programming\c++-libraries\qt-pods\qt-pods-core\release/libqt-pods-core.a(moc_podmanager.o):moc_podmanager.cpp:(.rdata$_ZTV10PodManager[_ZTV10PodManager]+0x68): undefined reference to `QObject::disconnectNotify(QMetaMethod const&)'
collect2.exe: error: ld returned 1 exit status
make[2]: *** [Makefile.Release:87: release\qt-pods-gui.exe] Error 1
make[2]: Leaving directory 'F:/Users/matan_000/Documents/Programming/c++-libraries/qt-pods/qt-pods-gui'
make[1]: *** [Makefile:36: release] Error 2
make[1]: Leaving directory 'F:/Users/matan_000/Documents/Programming/c++-libraries/qt-pods/qt-pods-gui'
make: *** [Makefile:95: sub-qt-pods-gui-make_first] Error 2
and a lot of errors like this before...
Im almost hopeless...
I will be happy to help! thank you! :)

libx264.so.146 not found while compiling C++ code or x264 itself

I just upgraded my system from Ubuntu 15.10 to Ubuntu 16.04 LTS. Now, for some reason my C++ project won't compile anymore. CLion keeps saying it's missing 'libx264.so.146 as you can see in the compile log:
/home/lorre851/CLion/bin/cmake/bin/cmake --build /home/lorre851/.CLion12/system/cmake/generated/ce7171e4/ce7171e4/Release --target main -- -j 8
[ 20%] Linking CXX executable build/main
/usr/bin/ld: warning: libx264.so.146, needed by /usr/local/lib/libavcodec.so.57, not found (try using -rpath or -rpath-link)
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_open_146'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_close'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_bit_depth'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_headers'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_encode'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_reconfig'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_parse'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_apply_profile'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_apply_fastfirstpass'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_levels'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_picture_init'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_default'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_default_preset'
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_delayed_frames'
collect2: error: ld returned 1 exit status
CMakeFiles/main.dir/build.make:172: recipe for target 'build/main' failed
make[3]: *** [build/main] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/main.dir/all' failed
make[2]: *** [CMakeFiles/main.dir/all] Error 2
CMakeFiles/Makefile2:79: recipe for target 'CMakeFiles/main.dir/rule' failed
make[1]: *** [CMakeFiles/main.dir/rule] Error 2
Makefile:118: recipe for target 'main' failed
make: *** [main] Error 2
Most people seem to give 'reinstalling x264' as a solution. However, reinstalling x264 with the following commands leads to the same error while compiling x264 itself.
git clone git://git.videolan.org/x264
cd x264
./configure --enable-static
make
/usr/bin/ld: warning: libx264.so.146, needed by /usr/local/lib/libavcodec.so, not found (try using -rpath or -rpath-link)
/usr/local/lib/libavcodec.so: undefined reference to `x264_encoder_open_146'
collect2: error: ld returned 1 exit status
Makefile:202: recipe for target 'x264' failed
make: *** [x264] Error 1
Does anyone have an idea how I could get around this?
Okay, after a day of trying to remove and recompile the liavcodec-dev library, without result, I decided to format the drive and reinstall Ubuntu from scratch.
Everything is working fine now.

MinGW/CMake Undefined Reference to ZLib

I have a project I want to build with CMake and compile with MinGW. The project uses Zlib. When I build with CMake I get no errors but then when I run MinGW Make it gives the following output:
C:\Projects\MultiMCBuild>C:\Qt\Tools\mingw492_32\bin\mingw32-make.exe
.
.
.
[ 50%] Linking CXX shared library ..\libMultiMC_logic.dll
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x1f6c): undefined reference to 'z_inflateEnd'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x29e2): undefined reference to 'z_inflateInit2_'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x2a6d): undefined reference to 'z_get_crc_table'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x2ca7): undefined reference to 'z_inflateEnd'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x2f52): undefined reference to 'z_inflateInit2_'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x2f77): undefined reference to 'z_inflateEnd'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x3239): undefined reference to 'z_inflateInit2_'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x3317): undefined reference to 'z_inflateEnd'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x3626): undefined reference to 'z_crc32'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x371f): undefined reference to 'z_inflate'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x376a): undefined reference to 'z_crc32'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x3a57): undefined reference to 'z_inflateEnd'
C:/Qt/Tools/mingw492_32/bin/../lib/gcc/i686-w64- mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj): bad reloc address 0x20 in section `.eh_frame'
collect2.exe: error: ld returned 1 exit status
logic\CMakeFiles\MultiMC_logic.dir\build.make:3186: recipe for target 'libMultiMC_logic.dll' failed
mingw32-make[2]: * * * [libMultiMC_logic.dll] Error 1
CMakeFiles\Makefile2:1806: recipe for target 'logic/CMakeFiles/MultiMC_logic.dir/all' failed
mingw32-make[1]: * * * [logic/CMakeFiles/MultiMC_logic.dir/all] Error 2
makefile:159: recipe for target 'all' failed
mingw32-make: * * * [all] Error 2
Anyone have a clue what I can do to fix this? I read that the code can't find the ZLib library, how do I link it?
EDIT here is my CMakeLists.txt. I got this from the Git project.
I just tried to generate a small example to reproduce your errors. I took my test file from the home page of zlib http://zlib.net/zpipe.c
My initial CMakeLists.txt was
cmake_minimum_required(VERSION 3.4)
project(zlib_test)
set(ZLIB_TEST_SOURCES zpipe.c)
add_executable(${PROJECT_NAME} ${ZLIB_TEST_SOURCES})
And I got the same errors
[ 50%] Building C object CMakeFiles/zlib_test.dir/zpipe.c.o
[100%] Linking C executable zlib_test
CMakeFiles/zlib_test.dir/zpipe.c.o: In function `def':
zpipe.c:(.text+0x65): undefined reference to `deflateInit_'
zpipe.c:(.text+0xcd): undefined reference to `deflateEnd'
zpipe.c:(.text+0x135): undefined reference to `deflate'
zpipe.c:(.text+0x1cf): undefined reference to `deflateEnd'
zpipe.c:(.text+0x25d): undefined reference to `deflateEnd'
CMakeFiles/zlib_test.dir/zpipe.c.o: In function `inf':
zpipe.c:(.text+0x2eb): undefined reference to `inflateInit_'
zpipe.c:(.text+0x353): undefined reference to `inflateEnd'
zpipe.c:(.text+0x3a4): undefined reference to `inflate'
zpipe.c:(.text+0x404): undefined reference to `inflateEnd'
zpipe.c:(.text+0x476): undefined reference to `inflateEnd'
zpipe.c:(.text+0x4a6): undefined reference to `inflateEnd'
collect2: error: ld returned 1 exit status
make[2]: *** [zlib_test] Error 1
make[1]: *** [CMakeFiles/zlib_test.dir/all] Error 2
make: *** [all] Error 2
After changing CMakeLists.txt to this form
cmake_minimum_required(VERSION 3.4)
project(zlib_test)
find_package(ZLIB REQUIRED)
if (ZLIB_FOUND)
include_directories(${ZLIB_INCLUDE_DIRS})
endif()
set(ZLIB_TEST_SOURCES zpipe.c)
add_executable(${PROJECT_NAME} ${ZLIB_TEST_SOURCES})
target_link_libraries(${PROJECT_NAME} ${ZLIB_LIBRARIES})
I could compile the program.
So your problem is: Where is ZLIB added in your CMakeLists.txt? At least, you need the line find_package(ZLIB REQUIRED).

Errors Compiling OpenCV on Debian

I installed OpenCV from the repos on my Debian Wheezy (64bits). I was able to compile the source file of an example but when it goes to the build step this happens:
g++ -o dist/Debug/GNU-Linux-x86/opencvtestapp build/Debug/GNU-Linux-x86/main.o
build/Debug/GNU-Linux-x86/main.o: In function `main':
/home/ ... /main.cpp:9: undefined reference to `cv::VideoCapture::VideoCapture(int)'
/home/ ... /main.cpp:11: undefined reference to `cv::VideoCapture::isOpened() const'
/home/ ... /main.cpp:16: undefined reference to `cv::VideoCapture::get(int)'
/home/ ... /main.cpp:17: undefined reference to `cv::VideoCapture::get(int)'
/home/ ... /main.cpp:21: undefined reference to `cv::namedWindow(std::string const&, int)'
/home/ ... /main.cpp:26: undefined reference to `cv::VideoCapture::read(cv::Mat&)'
/home/ ... /main.cpp:33: undefined reference to `cv::_InputArray::_InputArray(cv::Mat const&)'
/home/ ... /main.cpp:33: undefined reference to `cv::imshow(std::string const&, cv::_InputArray const&)'
/home/ ... /main.cpp:35: undefined reference to `cv::waitKey(int)'
/home/ ... /main.cpp:40: undefined reference to `cv::VideoCapture::~VideoCapture()'
/home/ ... /main.cpp:40: undefined reference to `cv::VideoCapture::~VideoCapture()'
build/Debug/GNU-Linux-x86/main.o: In function `cv::Mat::~Mat()':
/usr/include/opencv2/core/mat.hpp:297: undefined reference to `cv::fastFree(void*)'
build/Debug/GNU-Linux-x86/main.o: In function `cv::Mat::release()':
/usr/include/opencv2/core/mat.hpp:382: undefined reference to `cv::Mat::deallocate()'
collect2: error: ld returned 1 exit status
make[2]: *** [dist/Debug/GNU-Linux-x86/opencvtestapp] Error 1
make[2]: Leaving directory `/home/work/OpenCVTestApp'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/home/work/OpenCVTestApp'
make: *** [.build-impl] Error 2
I am using NetBeans 8.0 and OpenCV2.3 (from the repo).
Any suggestions on what I could be missing?
Thanks!
#berak is totally right on his comment, for that was the problem.
I forgot to add the libraries to the linker configuration. :P
As for 2.3 in 2014: I agree. I am planning to use 3.o alpha but this is what the repo had and I didn't want to compile the whole thing just to run some samples.
Thank you #berac! I hope the question is still useful for someone out there.