undefined reference when the reference is in the header, and should exist - c++

nachos
exception.o: In function `Exec(char*)':
/home/linux/ieng6/cs120f/cs120fbh/nachos/code/code/userprog/../userprog/exception.cc:223: undefined reference to `ProcessTable::Alloc(void*)'
progtest.o: In function `StartProcess(char*)':
/home/linux/ieng6/cs120f/cs120fbh/nachos/code/code/userprog/../userprog/progtest.cc:32: undefined reference to `ProcessTable::ProcessTable(int)'
/home/linux/ieng6/cs120f/cs120fbh/nachos/code/code/userprog/../userprog/progtest.cc:42: undefined reference to `ProcessTable::Alloc(void*)'
collect2: error: ld returned 1 exit status
make[1]: *** [nachos] Error 1
make: *** [all] Error 2
I have the code in this gist
https://gist.github.com/hassanshaikley/0721dd9f791a94629bfc
this error is strange because I include the necessary components. : (


you need to use the following options in the compiler:
-L to include your library search path
-l to add the particular libraries that need to be included

Related

Undefined reference when building AzerothCore module

I followed the steps on how to install azerothcore. I remembered I could add Modules, so I went in the website of azerothcore and downloaded a few modules. Before I downloaded them I checked and saw it says that it's building on master core, but for some reason I have the following error:
/usr/bin/ld: ../../../modules/libmodules.a(ModulesLoader.cpp.o): in function `AddModulesScripts()':
/root/azerothcore/build/modules/gen_scriptloader/static/ModulesLoader.cpp:60: undefined reference to `Addmod_1v1_arena_masterScripts()'
/usr/bin/ld: /root/azerothcore/build/modules/gen_scriptloader/static/ModulesLoader.cpp:61: undefined reference to `Addmod_boss_announcer_masterScripts()'
/usr/bin/ld: /root/azerothcore/build/modules/gen_scriptloader/static/ModulesLoader.cpp:63: undefined reference to `Addmod_npc_buffer_masterScripts()'
/usr/bin/ld: /root/azerothcore/build/modules/gen_scriptloader/static/ModulesLoader.cpp:64: undefined reference to `Addmod_npc_spectator_masterScripts()'
/usr/bin/ld: /root/azerothcore/build/modules/gen_scriptloader/static/ModulesLoader.cpp:65: undefined reference to `Addmod_reward_shop_masterScripts()'
/usr/bin/ld: /root/azerothcore/build/modules/gen_scriptloader/static/ModulesLoader.cpp:66: undefined reference to `Addmod_solocraft_masterScripts()'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [src/server/apps/CMakeFiles/worldserver.dir/build.make:175: src/server/apps/worldserver] Error 1
make[1]: *** [CMakeFiles/Makefile2:1086: src/server/apps/CMakeFiles/worldserver.dir/all] Error 2
make: *** [Makefile:130: all] Error 2
and I am not capable of fixing it. Can anyone please help?

Remove _master from all module subdirectories.
You can avoid this error by using git clone or cloning the modules in general with a git interface, instead of downloading a .zip file.

Linkage problem when building program with libtorch on Raspberry PI

I'm writing a C++ program using libtorch and OpenCV.
Here is the output of my CMakeLists.txt, with the libraries versions :
-- Pytorch status :
-- libraries: torch;torch_library;/usr/lib/libc10.so
-- OpenCV library status :
-- version: 3.2.0
-- libraries: opencv_calib3d;opencv_core;opencv_features2d;opencv_flann;opencv_highgui;opencv_imgcodecs;opencv_imgproc;opencv_ml;opencv_objdetect;opencv_photo;opencv_shape;opencv_stitching;opencv_superres;opencv_video;opencv_videoio;opencv_videostab;opencv_viz;opencv_aruco;opencv_bgsegm;opencv_bioinspired;opencv_ccalib;opencv_datasets;opencv_dpm;opencv_face;opencv_freetype;opencv_fuzzy;opencv_hdf;opencv_line_descriptor;opencv_optflow;opencv_phase_unwrapping;opencv_plot;opencv_reg;opencv_rgbd;opencv_saliency;opencv_stereo;opencv_structured_light;opencv_surface_matching;opencv_text;opencv_ximgproc;opencv_xobjdetect;opencv_xphoto
-- include path: /usr/include;/usr/include/opencv
-- Configuring done
-- Generating done
-- Build files have been written to: /home/<my_user>/<project>/cmake-build
You can see that torch needs libc10.so to work.
When I call make, everything goes fine, until this happens during linking :
[ 8%] Linking CXX executable POC_V4
/usr/lib/libc10.so: file not recognized: file format not recognized
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/POC_V4.dir/build.make:298: POC_V4] Error 1
make[1]: *** [CMakeFiles/Makefile2:96: CMakeFiles/POC_V4.dir/all] Error 2
make: *** [Makefile:104: all] Error 2
When I do a file command on this file, I see that it is compiled for x86-64 architectures, instead of ARM.
Here is the output of the file command on /usr/lib/libc10.so and on /usr/lib/libtorch.so.3.0.0 to have a comparison:
/usr/lib/libc10.so: ELF 64-bit LSB pie executable, x86-64, version 1 (GNU/Linux), dynamically linked, BuildID[sha1]=f8019a46a003bc238af0fb3fb8331af8af69aa33, not stripped
/usr/lib/libtorch.so.3.0.0: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (SYSV), dynamically linked, BuildID[sha1]=2f8320292f01aab7c9e2e2577b3be2025689c0a7, stripped
How can I have a working libc10.so file ?
EDIT:
I started to re-build PyTorch on my raspberry PI so it would re-build libtorch too.
This takes many hours, and crashed during the night for a linkage problem :
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_fetch_add_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_load_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_exchange_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_fetch_sub_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_compare_exchange_8'
collect2: error: ld returned 1 exit status
make[2]: *** [caffe2/CMakeFiles/conv_to_nnpack_transform_test.dir/build.make:108: bin/conv_to_nnpack_transform_test] Error 1
make[1]: *** [CMakeFiles/Makefile2:2836: caffe2/CMakeFiles/conv_to_nnpack_transform_test.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_fetch_add_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_load_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_exchange_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_fetch_sub_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_compare_exchange_8'
collect2: error: ld returned 1 exit status
make[2]: *** [caffe2/CMakeFiles/depthwise3x3_conv_op_test.dir/build.make:108: bin/depthwise3x3_conv_op_test] Error 1
make[1]: *** [CMakeFiles/Makefile2:2867: caffe2/CMakeFiles/depthwise3x3_conv_op_test.dir/all] Error 2
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_fetch_add_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_load_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_exchange_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_fetch_sub_8'
/usr/bin/ld: /home/<myuser>/pytorch_install/pytorch/build/lib/libcaffe2.so: undefined reference to `__atomic_compare_exchange_8'
collect2: error: ld returned 1 exit status
make[2]: *** [caffe2/CMakeFiles/pattern_net_transform_test.dir/build.make:108: bin/pattern_net_transform_test] Error 1
make[1]: *** [CMakeFiles/Makefile2:2805: caffe2/CMakeFiles/pattern_net_transform_test.dir/all] Error 2
make: *** [Makefile:161: all] Error 2
However, the build outputed a libc10.so file with the following signature!
/usr/lib/libc10.so: ELF 32-bit LSB pie executable, ARM, EABI5 version 1 (GNU/Linux), dynamically linked, BuildID[sha1]=61d77cfaa9647739e17f6b08caeb53382d9e9108, not stripped
I replaced it in the /usr/lib folder and tried to build my project : It went further than before, and crashed for another file-format problem. This proves that if I manage to fully rebuild libtorch, I should be able to build my project !
Can someone help me solve the new linking problem ?
EDIT #2:
I found this issue with the same problem. Trying the given solution and coming back here if that works to write a full tutorial.

I have found a link overcome the issue you are facing. Please read it through it should solve your solve.
https://github.com/pytorch/pytorch/issues/14727

I finally made it work and detailed it in the answer of this question.
Don't hesitate to improve it if you find errors / bad practices !

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! :)

undefined reference error while installing OpenCV not compiling

I tried to find the same case as mine, but I couldn't. Most of them here are about undefined reference error during compiling their own code, but in my case this error occurred while installing OpenCV.
I referred to this page :
http://milq.github.io/install-opencv-ubuntu-debian/
I use armv7l and debian-scratch 9.3.
I tried to install OpenCV 3.4.0
I have this error :
[ 31%] Building CXX object modules/features2d/CMakeFiles/opencv_features2d.dir/src/akaze.cpp.o
//usr/lib/libgdal.so.20: undefined reference to `XML_SetUserData'
//usr/lib/libgdal.so.20: undefined reference to `XML_SetUnknownEncodingHandler'
//usr/lib/arm-linux-gnueabihf/libharfbuzz.so.0: undefined reference to `FT_Set_Char_Size'
//usr/lib/arm-linux-gnueabihf/libQt5Gui.so.5: undefined reference to `glGenerateMipmap'
//usr/lib/arm-linux-gnueabihf/libQt5Gui.so.5: undefined reference to `glUniform2fv'
//usr/lib/arm-linux-gnueabihf/libbluray.so.1: undefined reference to `FT_GlyphSlot_Embolden'
...
//usr/lib/arm-linux-gnueabihf/libavcodec.so.57: undefined reference to `deflateReset'
/usr/bin/ld: ../../bin/opencv_annotation: hidden symbol `atexit' in /usr/lib/arm-linux-gnueabihf/libc_nonshared.a(atexit.oS) is referenced by DSO
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
apps/annotation/CMakeFiles/opencv_annotation.dir/build.make:100: recipe for target 'bin/opencv_annotation' failed
make[2]: *** [bin/opencv_annotation] Error 1
CMakeFiles/Makefile2:4690: recipe for target 'apps/annotation/CMakeFiles/opencv_annotation.dir/all' failed
make[1]: *** [apps/annotation/CMakeFiles/opencv_annotation.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
I found out it's from a linking library error, but as I'm a beginner of Linux, it couldn't help me.
I hope this question is clear.

Normaliz undefined reference to `boost::system::system_category()'

I'm trying to install the library Normaliz having dependencies like CocoALib, SCIP. I've made its dependencies according to their guidances. However, I get the error while make of Normaliz on both Ubuntu and Mac OSX,
[ 81%] Linking CXX executable normaliz
libnormaliz/libnormaliz.so.3.4.0: undefined reference to `boost::system::system_category()'
libnormaliz/libnormaliz.so.3.4.0: undefined reference to `boost::system::generic_category()'
collect2: error: ld returned 1 exit status
CMakeFiles/normaliz.dir/build.make:99: recipe for target 'normaliz' failed
make[2]: *** [normaliz] Error 1
CMakeFiles/Makefile2:99: recipe for target 'CMakeFiles/normaliz.dir/all' failed
make[1]: *** [CMakeFiles/normaliz.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2
I really fed up with it since two weeks! How can it be overcome?
Even if it is boost linkage problem, how can it be linked? There is no option for it. That kinda headaches cause apathy to open-source at least for young programmers like me.