I'm trying to compile osgearth library with VS2010. The library uses CMake, so after setting all dependencies it generates a VS2010 solution file. However when running build in VS I get this linker error (and 200 similar ones)
Error 7 error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::basic_ofstream >::`vbase destructor'(void)" (_imp??_D?$basic_ofstream#DU?$char_traits#D#std###std##QAEXXZ) referenced in function "public: virtual void __thiscall osgEarth::DiskCache::setImage(class osgEarth::TileKey const &,struct osgEarth::CacheSpec const &,class osg::Image const *)" (?setImage#DiskCache#osgEarth##UAEXABVTileKey#2#ABUCacheSpec#2#PBVImage#osg###Z) C:\swproj\osgearth-src\src\osgEarth\Caching.obj osgEarth
I'm not very familiar with C++, is there anything else I have to set up?
You're missing a reference to std::ofstream. You either need an #include in one of your files or a reference to the standard library dll in your project.
Related
I've cloned the pbrt-v3 repository using Visual Studio 2017. I've tried to compile a project where I included the Transform.h, but I'm getting the following error from the linker:
LNK2019 unresolved external symbol "int __cdecl Imf::globalThreadCount(void)" (?globalThreadCount#Imf##YAHXZ) referenced in function "class pbrt::RGBSpectrum * __cdecl pbrt::ReadImageEXR(class std::basic_string,class std::allocator > const &,int *,int *,class pbrt::Bounds2 *,class pbrt::Bounds2 *)" (?ReadImageEXR#pbrt##YAPEAVRGBSpectrum#1#AEBV?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##std##PEAH1PEAV?$Bounds2#H#1#2#Z)
I've compiled and installed openexr using CMake for Visual Studio. I've added
libpbrt.lib
libglog_static.lib
IlmThread-2_2.lib
Half.lib
Iex-2_2.lib
IexMath-2_2.lib
Imath-2_2.lib
as additional dependencies in the project settings. I wasn't able to figure out in which library globalThreadCount is defined. So, which library am I missing?
I'm a beginner to cpp and trying to use a cpp library called ppconsul(https://github.com/oliora/ppconsul ). This library has dependency to some of other libraries like (boost and curl). I have build ppconsul with all its dependencies and trying to use ppconsul executable in a new project. When I try to build the new project, I'm getting some linker issue like below.
error LNK2001: unresolved external symbol "public: virtual char const * thiscall ppconsul::BadStatus::what(void)const " (?what#BadStatus#ppconsul##UBEPBDXZ)
1>ConsulApp.obj : error LNK2019: unresolved external symbol "class std::basic_string,class std::allocator > __cdecl ppconsul::helpers::encodeUrl(class std::basic_string,class std::allocator > const &)" (?encodeUrl#helpers#ppconsul##YA?AV?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##std##ABV34##Z) referenced in function "void __cdecl ppconsul::parameters::detail::printParameter(class std::basic_ostream > &,class std::basic_string,class std::allocator > const &,struct ppconsul::kw::dc_keyword)" (??$printParameter#Udc_keyword__#kw#ppconsul###detail#parameters#ppconsul##YAXAAV?$basic_ostream#DU?$char_traits#D#std###std##ABV?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##4#Udc_keyword__#kw#2##Z)
I tried to link the project and change the visual studio but nothing worked. Anybody has any idea about this linker issue?
TIA,
Prassi
Issue resolved- Refer this thread github.com/oliora/ppconsul/issues/24
build ppconsul as a static library by passing -DBUILD_STATIC_LIB=ON to CMake.
Is there any way I can have the main functions for a library built in vs 2010 be accessible from a vs2005 project? The problem that I face is that I have a project in vs 2005 that needs to use the clang frontend library to parse c code. The clang library requires vs 2010 to compile.
Any light you could shed on my problem is appreciated.
Thanks,
Saketh
EDIT:
I receive the following linker errors on compilation
1>hello.lib(hello.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __int64 __thiscall std::ios_base::width(_int64)" (_imp_?width#ios_base#std##QAE_J_J#Z) referenced in function "class std::basic_ostream > & __cdecl std::operator<< >(class std::basic_ostream > &,char const *)" (??$?6U?$char_traits#D#std###std##YAAAV?$basic_ostream#DU?$char_traits#D#std###0#AAV10#PBD#Z)
1>hello.lib(hello.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __int64 __thiscall std::basic_streambuf >::sputn(char const *,_int64)" (_imp_?sputn#?$basic_streambuf#DU?$char_traits#D#std###std##QAE_JPBD_J#Z) referenced in function "class std::basic_ostream > & __cdecl std::operator<< >(class std::basic_ostream > &,char const *)" (??$?6U?$char_traits#D#std###std##YAAAV?$basic_ostream#DU?$char_traits#D#std###0#AAV10#PBD#Z)
1>hello.lib(hello.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __int64 __thiscall std::ios_base::width(void)const " (_imp?width#ios_base#std##QBE_JXZ) referenced in function "class std::basic_ostream > & __cdecl std::operator<< >(class std::basic_ostream > &,char const *)" (??$?6U?$char_traits#D#std###std##YAAAV?$basic_ostream#DU?$char_traits#D#std###0#AAV10#PBD#Z)
1>C:\Users\sakethk\Perforce\sakethk_SAKETHK_7702\source\qcom\qct\modem\uim\tools\sakethk\hello05\Debug\hello05.exe : fatal error LNK1120: 3 unresolved externals
No. Within a single module, you cannot mix objects compiled against different major versions of the CRT. This generally procludes mixing of objects compiled using different major versions of the compiler.
The correct thing to do would be to encapsulate your usage of Visual C++ 2010 within a DLL, and load that DLL from your executable compiled with Visual C++ 2005. Alternatively, upgrade your sources to use Visual C++ 2010. Visual C++ 2005 is ancient.
Your library functions should be at the lowest level here i mean that you should use C-style parameters to functions and use extern "C" to avoind compilers mangling. Here you will find good article on how to create a great library compatible with every compiler. http://chadaustin.me/cppinterface.html
I'm attaching some external libraries to my project in C++.
These libraries make use of the opencv2 libraries.
I already added the opencv2 include files to my c/c++ properties. I also added all the relevant lib files which I googled and found to the Linker input list. (I'm running the release version, but I also tried the debug version with the "d" extension).
opencv_core230.lib
opencv_highgui230.lib
opencv_objdetect230.lib
opencv_imgproc230.lib
opencv_ml230.lib
opencv_legacy230.lib
opencv_video230.lib
I'm getting these 4 annoying linking problems regarding the setSVMDetector#HOGDescriptor.
I looked everywhere for a solution and couldn't find one.; no one really uses the setSVM function in the external program.
Here are the linking problems:
Error 14 error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::setSVMDetector(class cv::_InputArray const &)" (?setSVMDetector#HOGDescriptor#cv##UAEXABV_InputArray#2##Z) C:\Users\idan\Documents\Visual Studio 2010\GraspTestingTool\GraspTestingTool\GraspTestingTool.obj GraspTestingTool
Error 15 error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::setSVMDetector(class cv::_InputArray const &)" (?setSVMDetector#HOGDescriptor#cv##UAEXABV_InputArray#2##Z) C:\Users\idan\Documents\Visual Studio 2010\GraspTestingTool\GraspTestingTool\htmlGenerator.obj GraspTestingTool
Error 16 error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::setSVMDetector(class cv::_InputArray const &)" (?setSVMDetector#HOGDescriptor#cv##UAEXABV_InputArray#2##Z) C:\Users\idan\Documents\Visual Studio 2010\GraspTestingTool\GraspTestingTool\sequenceTests.obj GraspTestingTool
Error 17 error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::setSVMDetector(class cv::_InputArray const &)" (?setSVMDetector#HOGDescriptor#cv##UAEXABV_InputArray#2##Z) C:\Users\idan\Documents\Visual Studio 2010\GraspTestingTool\GraspTestingTool\Utilities.obj GraspTestingTool
Does anyone know how to solve this issue?
Thanks a lot!
Error is due to not adding specifice library in debug or releas mode.
use 32 bit or 64 library depending on your target machine
Add respective library of opencv in release mode -
opencv_core242.lib opencv_highgui242.lib opencv_imgproc242.lib opencv_ml242.lib
opencv_legacy242.lib opencv_video242.lib
OR If you want run program in debug mode then
use debug lib of opencv
opencv_core220d.lib
opencv_highgui220d.lib
opencv_video220d.lib
opencv_ml220d.lib
opencv_legacy220d.lib
opencv_imgproc220d.lib
opencv_objdetect242.lib
C:\opencv\build\x86\vc10\lib
Add the library file "opencv_objdetect248.lib; opencv_objdetect248d.lib;" in Project roperties-->Linker-->Input.
You need to add opencv_objdetect library. If you using debug mode add objdetect(version)d.lib, however, if you release mode add objdetect(version).lib
I am getting a bunch of linking errors while trying to link the release version of an executable(debug version does not have the same issue). Comparing the command line for the link does not reveal any issues.
there are broadly 2 types of errors neither of which I can get a handle on.
The first kind complains about a unresolved external symbol _declspec(dllimport)
As an example:
error LNK2019: unresolved external symbol
"_declspec(dllimport)
public: __thiscall
stlpd_std::basic_string,class stlpd_std::allocator >::basic_string,class stlpd_std::allocator >(class stlpd_std::basic_string,class stlpd_std::allocator > const &)" (_imp??0?$basic_string#DV?$char_traits#D#stlpd_std##V?$allocator#D#2##stlpd_std##QAE#ABV01##Z) referenced in function "public: __thiscall Springfield::generic::runtime_error::runtime_error(class stlpd_std::basic_string,class stlpd_std::allocator > const &)" (??0runtime_error#generic#Springfield##QAE#ABV?$basic_string#DV?$char_traits#D#stlpd_std##V?$allocator#D#2##stlpd_std###Z)
for a more human readable version(replacing all the strings):
error LNK2019: unresolved external symbol
"__declspec(dllimport)
public: __thiscall
string::basic_string,class stlpd_std::allocator >(class string const &)" (_imp??0?$basic_string#DV?$char_traits#D#stlpd_std##V?$allocator#D#2##stlpd_std##QAE#ABV01##Z) referenced in function "public: __thiscall Springfield::generic::runtime_error::runtime_error(class string const &)" (??0runtime_error#generic#Springfield##QAE#ABV?$basic_string#DV?$char_traits#D#stlpd_std##V?$allocator#D#2##stlpd_std###Z
The sceond class of errors complains about
unresolved external symbol __CrtDbgReportW
I hope I can get some kind of insight in dealing with this.
From the errors it looks like you are not including the CRT as one of your linked libraries. Here is a link to the different CRT lib's offered in Visual Studio 2005. Choose the one which is most appropriate and make sure it's in the list of lib's to link against
http://msdn.microsoft.com/en-us/library/abx4dbyh(VS.80).aspx
It looks like you're either including a file that's been built using the debug settings or you're mixing runtime libraries (DLL and static).