I am trying to build the BGSLibrary for Windows 10, cmake 3.9, with python support, built with opencv 3.1 and boost 1.64.0 with Visual Studio Community 2017.
Can someone more familiar with Visual Studio interpret this error for me. The c++ seems to compile great, but then project solution fails. It starts by building all the .obj files
2>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\bin\HostX86\x86\Lib.exe /OUT:"C:\Users\Ben\Documents\bgslibrary\build\libbgs.lib" /NOLOGO /machine:X86 libbgs.dir\Release\AdaptiveBackgroundLearning.obj
2>libbgs.dir\Release\AdaptiveSelectiveBackgroundLearning.obj
2>libbgs.dir\Release\CodeBook.obj
2>libbgs.dir\Release\DPAdaptiveMedian.obj
2>libbgs.dir\Release\DPEigenbackground.obj
The general error reads.
5>libbgs.lib(LBSP.obj) : error LNK2019: unresolved external symbol "public: virtual void __thiscall cv::Feature2D::read(class cv::FileNode const &)" (?read#Feature2D#cv##UAEXABVFileNode#2##Z) referenced in function "[thunk]:public: virtual void __thiscall cv::Feature2D::read`vtordisp{4294967292,0}' (class cv::FileNode const &)" (?read#Feature2D#cv##$4PPPPPPPM#A#AEXABVFileNode#2##Z)
But the file LBSP.obj compiled fine just 100 lines earlier? I can see it here.
This file was created during the build, why can't it link? Where do I need to add this dir?
I'm reading other SO questions that this error may mean I need to add additional paths, which was done pre-VS2017 by going to PROPERTIES->LINKER->ADDITIONAL DEPENDENCIES. I don't see this option or structure anymore.
3>C:\Users\Ben\Documents\opencv\modules\core\include\opencv2/core/types_c.h(894)
This was a Cmake path error, not a Visual Studio error. Adding OpenCV/bin to path solved this.
Related
In my on my header file (pages.h), I've done:
#include "mat.h".
In my cpp, all I'm trying to do is a simple:
MATFile *pmat.
However, whenever I try to build my code, I get an error that says:
1>pages.obj : error LNK2019: unresolved external symbol _matOpen referenced in function "public: void __thiscall DataPage::LoadDBIData(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?LoadDBIData#DataPage##QAEXV?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##std###Z)
and
1>C:\Users\celes\source\repos\bci2000-svn\tools\P300Classifier_electrode_selection\P300Classifier_electrode_selection.exe : fatal error LNK1120: 1 unresolved externals
I've tried going into Properties->C/C++->General->Additional Include Directories and adding a file path of C:\Program Files (x86)\MATLAB\R2015b\extern\include", but I am still receiving the same error. Without this included path, I only received the second error, not the first one.
I am using Visual Studio 2010 (it's for an old research lab) and R2015b for MATLAB.
Any sort of help would be appreciated!
The error message indicates that the compiler has trouble resolving the symbol. Apparently, you didn't set up the project correctly. Besides the "Additional Include Directories" option, you also need to set the library directory in the Linker-> Additional Library Directories for using an external library.
Because you are running a project in VS C++, you will need to have $(MATLABPATH)\extern\lib\<arch>\microsoft in that option, where $(MATLABPATH) is "C:\Program Files (x86)\MATLAB\R2015b" and the <arch> might be Win64 or Win32 depending on your target machine flag in your VS project (i.e. 32- or 64-bit).
Firstly, you could check if you add C:\Program Files (x86)\MATLAB\R2015b\extern\include in Porperties->VC++ Directories-> Include Directories, C:\Program Files (x86)\MATLAB\R2015b\extern\lib\winXX\microsoft in Porperties->VC++ Directories->Library Directories.
Secondly, you could check if you add libmat.lib;ibeng.lib;libmx.lib in Porperties->Linker->Input->Additional Dependencies.
Finally, you could refer to Microsoft Docs about LNK2019 and LNK1120.
I have been trying to compile dlib library in visual studio.
So I created an empty project.
I added face_landmark_detection_ex.cpp and source.cpp from dlib/all folder into my project (I copied paste the aforementioned into "Source Files" in my project).
I added: C:\Users\user\Desktop\dlib2\dlib-19.4 and C:\Users\user\Desktop\dlib2\dlib-19.4\dlib\external\libjpeg and C:\Users\user\Desktop\dlib2\dlib-19.4\dlib\external\libpng into the include directory.
And added DLIB_PNG_SUPPORT and DLIB_JPEG_SUPPORT into the C/C++ -> Preprocessor -> Preprocessor Defintion.
the platform chosen is Active(win32).
Under Debugging -> Command Argument, I added the following arguments: C:\Users\user\Desktop\dlib2\dlib-19.4\shape_predictor_68_face_landmarks.dat C:\Users\user\Desktop\dlib2\dlib-19.4\examples\faces*.jpg
When trying to build the project I got the following errors:
Severity Code Description Project File Line Suppression State
Error LNK2019 unresolved external symbol _png_set_sig_bytes referenced in function "private: void __thiscall dlib::png_loader::read_image(char const *)" (?read_image#png_loader#dlib##AAEXPBD#Z) dlibTest c:\Users\user\documents\visual studio 2015\Projects\dlibTest\dlibTest\source.obj 1
Any help is much appreciated!!
You have to add the source files from the libpng and libjpeg folders too.
I can't seem to get a very simple program to compile in Visual Studio 2013. My goal is to incorporate UHD into a C++ program (UHD Driver and Libraries for Windows). I downloaded and installed the Windows UHD package.Since the library also depends on Boost, I also downloaded the appropriate Boost library. After that, I wrote a quick test program in Visual Studio 2013:
#include "stdafx.h"
#include <iostream>
#include <uhd\usrp\multi_usrp.hpp>
#include <uhd\types\device_addr.hpp>
using namespace uhd;
int main(void)
{
device_addr_t hint;
device_addrs_t dev_addrs = device::find(hint);
system("pause");
return 0;
}
In case anyone is interested, this program should locate any USRPs attached to a host PC. I defined the appropriate include paths in Visual Studio: . .
To be clear, I included two paths to the header files:
C:\Program Files (x86)\UHD\include and C:\Program Files (x86)\boost_1_55_0
and one path to the library:
C:\Program Files (x86)\UHD\lib
When I wrote the above program, Visual Studio recognized the additional include files, recognized device_addr_t as a typedef, and didn't throw any errors. However, when I built the program, I received these errors:
Error 3 error LNK2019: unresolved external symbol "__declspec(dllimport) public: static class std::vector<class uhd::device_addr_t,class std::allocator<class uhd::device_addr_t> > __cdecl uhd::device::find(class uhd::device_addr_t const &)" (__imp_?find#device#uhd##SA?AV?$vector#Vdevice_addr_t#uhd##V?$allocator#Vdevice_addr_t#uhd###std###std##ABVdevice_addr_t#2##Z) referenced in function _main C:\Users\...\Documents\Visual Studio 2013\Projects\uhd_test\uhd_test\uhd_test.obj uhd_test
Error 2 error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall uhd::device_addr_t::~device_addr_t(void)" (__imp_??1device_addr_t#uhd##QAE#XZ) referenced in function "public: void * __thiscall uhd::device_addr_t::`scalar deleting destructor'(unsigned int)" (??_Gdevice_addr_t#uhd##QAEPAXI#Z) C:\Users\...\Documents\Visual Studio 2013\Projects\uhd_test\uhd_test\uhd_test.obj uhd_test
Error 1 error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall uhd::device_addr_t::device_addr_t(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (__imp_??0device_addr_t#uhd##QAE#ABV?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##std###Z) referenced in function _main C:\Users\...\Documents\Visual Studio 2013\Projects\uhd_test\uhd_test\uhd_test.obj uhd_test
Error 4 error LNK1120: 3 unresolved externals C:\Users\...\Documents\Visual Studio 2013\Projects\uhd_test\Debug\uhd_test.exe uhd_test
I've encountered these errors before in other programs, but I was able to resolve them relatively easily; either I would misspell a crucial include, or there would be an issue with a template class. However, in this instance, I can't seem to resolve the issue.
Any constructive input would be appreciated.
NOTE: In addition to defining the library directory path, I've explicitly added the UHD library, and I receive the same errors.
I got your example working. Here's the software versions I used since you didn't mention much in your description:
Microsoft Visual Studio 2013
VC++ Redistributable Package for VS2013 (vcredist_x86)
UHD 003.007.002, VS2013, Win32
Boost 1.56, lib32-msvc-12.0 binary package
Here are the project configuration properties you need to set in your VS2013 applications:
C/C++ -> General -> Additional Include Directories
C:\local\boost_1_56_0
C:\Program Files (x86)\uhd\include
Linker -> General -> Additional Library Directories
C:\local\boost_1_56_0\lib32-msvc-12.0
C:\Program Files (x86)\uhd\lib
Linker -> Input -> Additional Dependencies
uhd.lib
I think the last step is what's tripping you up, good luck!
I followed exactly what David Greene said, and I ended up with the same errors. Eventually I figured out that I had downloaded the 64-bit UHD, but I was using Visual Studio 2013 Express, which was a 32-bit compiler. Downloading the 32-bit version of UHD for Visual Studio 2013 solved the problem. For anyone else having this problem, double check that the compiler matches which version of UHD you install.
I downloaded and built the boost libraries (version 1.47.0) on Windows 7 (64bit) following the instructions here.
Now when I want to use the Boost::Filesystem library I can include the header file without issue and it compiles my code file. The problem arises at linking. I get the following errors;
main.obj : error LNK2019: unresolved external symbol "class boost::filesystem3::file_status __cdecl boost::filesystem3::detail::status(class boost::filesystem3::path const &,class boost::system::error_code *)" (?status#detail#filesystem3#boost##YA?AVfile_status#23#AEBVpath#23#PEAVerror_code#system#3##Z) referenced in function "bool __cdecl boost::filesystem3::exists(class boost::filesystem3::path const &)" (?exists#filesystem3#boost##YA_NAEBVpath#12##Z)
main.obj : error LNK2019: unresolved external symbol "private: static class std::codecvt<wchar_t,char,int> const * & __cdecl boost::filesystem3::path::wchar_t_codecvt_facet(void)" (?wchar_t_codecvt_facet#path#filesystem3#boost##CAAEAPEBV?$codecvt#_WDH#std##XZ) referenced in function "public: static class std::codecvt<wchar_t,char,int> const & __cdecl boost::filesystem3::path::codecvt(void)" (?codecvt#path#filesystem3#boost##SAAEBV?$codecvt#_WDH#std##XZ)
(amongst others)
It might be worth noting that when I first tried to build the project it said it couldn't find the .lib file libboost_filesystem-vc100-mt-1_47.lib. I hadn't specifically told it it needed that file so not sure how it figured that out? Either way I pointed the linker to the correct directory and then it gave the above errors.
Does anybody know how to fix this problem? Thanks.
Edit: I'm using VS2010 toolchain through eclipse CDT to build the system. The complete compile command is
cl /c /EHs /MD /Zi /I"C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include" /I"C:\boost_1_47_0" /nologo <SOURCE_FILE>
and the linker command
link /debug /nologo /libpath:C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\lib\amd64 /libpath:C:\boost_1_47_0\stage\lib /libpath:C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\x64 /OUT:<EXE_NAME> <OBJECT_FILES>
Rebuild the Boost library with address-model=64 b2 command line switch. This builds 64 bit libraries.
If you're on linux and happen upon this article looking for the fix the fix is (at least on ubuntu 12.10) to install the development package for boost filesystem:
sudo apt-get install libboost-filesystem-dev
That installs the correct libraries for linking to and all works well.
I'm trying to link my project with fftw and so far, I've gotten it to compile, but not link. As the site said, I generated all the .lib files (even though I'm only using double precision), and copied them to C:\Program Files\Microsoft Visual Studio 9.0\VC\lib, the .h file to C:\Program Files\Microsoft Visual Studio 9.0\VC\include and the .dll to C:\windows\system32.
I've copied the tutorial program, and the exact error I am getting is:
1>hw10.obj : error LNK2019: unresolved external symbol __imp__fftw_free referenced in function "bool __cdecl test(void)" (?test##YA_NXZ)
1>hw10.obj : error LNK2019: unresolved external symbol __imp__fftw_destroy_plan referenced in function "bool __cdecl test(void)" (?test##YA_NXZ)
1>hw10.obj : error LNK2019: unresolved external symbol __imp__fftw_execute referenced in function "bool __cdecl test(void)" (?test##YA_NXZ)
1>hw10.obj : error LNK2019: unresolved external symbol __imp__fftw_plan_dft_1d referenced in function "bool __cdecl test(void)" (?test##YA_NXZ)
1>hw10.obj : error LNK2019: unresolved external symbol __imp__fftw_malloc referenced in function "bool __cdecl test(void)" (?test##YA_NXZ)
So, what could be wrong with my project setup? Thanks!
My case
Using FFTW in Visual Studio 2010
Precompiled FFTW 3.3.1 Windows DLLs install using fftw-3.2.1-dll.zip, on my Windows XP machine.
Open cmd window and go to lib.exe folder C:\Program Files\Microsoft Visual Studio 10.0\VC\bin>
Type lib /def:libfftw3-3.def
Type lib /def:libfftw3f-3.def
Type lib /def:libfftw3l-3.def
If you have a error on command, copy any mspdb80.dll or mspdb100.dll file to in bin directory.
You will get 6 files
libfftw3-3.exp, libfftw3-3.lib, libfftw3f-3.exp, libfftw3f-3.lib,
libfftw3l-3.exp and libfftw3l-3.lib
and copy it to programming directory.
Delete all mspdb80.dll or mspdb100.dll file from bin directory.
Closed Project and open again and rebuild it again.
Have you actually linked against the library in the project you're building?
Project -> Properties -> Linker -> Input -> Additional dependencies
You need to add the library's filename to that field.
Assuming you've actually linked your project against the lib and it doesn't work, use /verbose:lib and paste the output of that and the output of
dumpbin /exports fftw.lib | findstr fftw_free
I had similar problem. What helped was compiling the fftw libs with this help Compiling FFTW source in Visual studio. Actually more closely the problem was compiling my application Win 32 and trying to use x64 -libraries. So make sure the platform is same.