OpenCV+CUDA+VS 2022: fatal error LNK1120: 1 unresolved externals [opencv_world.vcxproj]

StevenW807 · July 1, 2024, 4:20am

Hi, I would like to use CUDA to speed up my OpenCV python script.
System: win 11
Hardware: laptop with NVIDIA RTX 2000 Ada Generation
I follow this video1 and video2 to setup CUDA. Basically, here are my steps:

Install CUDA Toolkit, Cmake GUI, Python 3.12, Java, JDK, VS 2022 (video suggested to use VS 2019, but VS 2019 is deprecated , so I used VS 2022). Inside VS 2022, install “Desktop development with C++” (necessary) and “Python development” (unsure if it’s necessary).
Git clone opencv repo, opencv_contrib repo, create a new empty folder “build”
Open Cmake GUI, select source code “{path}/opencv” and build binary folder “{path}/build”. Click “Configure” button, select the generator “VS 2022”. Click “OK”.
Select WITH_CUDA, ENABLE_FAST_MATH, BUILD_opencv_world, provide path for OPENCV_EXTRA_MODULES_PATH “{path}/opencv_contrib/modules” (remember to use /, not ). Then, click “Configure” button again.
Select CUDA_FAST_MATH. Based on my GPU hardware, select CUDA_ARCH_BIN = 8.6. Change CMAKE_CONFIGURATION_TYPES to “Release”. Click “Configure” button again. Click “Generate” button.
Open Command Prompt in win 11, type command direcctly: cmake --build "{path}\opencvGPU\build --target INSTALL --config Release

Then, I can see some warnings and a fatal error:
{path}\build\bin\Release\opencv_world4100.dll : fatal error LNK1120: 1 unresolved externals [{path}\build\modules\world\opencv_world.vcxproj]
Please read the complete message below:

C:\Users\StevenWang>cmake --build "C:\Users\StevenWang\opencvGPU\build" --target INSTALL --config Release

(skip some no-error messages here)

LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library [C:\Users\Steve
nWang\opencvGPU\build\modules\world\opencv_world.vcxproj]
fast.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char
_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@V
GG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvG
PU\build\modules\world\opencv_world.vcxproj]
logos.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::cha
r_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@
VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencv
GPU\build\modules\world\opencv_world.vcxproj]
surf.ocl.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char
_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@V
GG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvG
PU\build\modules\world\opencv_world.vcxproj]
tbmr.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_tra
its<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@x
features2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\b
uild\modules\world\opencv_world.vcxproj]
vgg.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_trai
ts<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@xf
eatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\bu
ild\modules\world\opencv_world.vcxproj]
xfeatures2d_init.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct s
td::char_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefau
ltName@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang
\opencvGPU\build\modules\world\opencv_world.vcxproj]
pct_signatures_sqfd.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struc
t std::char_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDe
faultName@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenW
ang\opencvGPU\build\modules\world\opencv_world.vcxproj]
stardetector.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::
char_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultNa
me@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\ope
ncvGPU\build\modules\world\opencv_world.vcxproj]
surf.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_tra
its<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@x
features2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\b
uild\modules\world\opencv_world.vcxproj]
surf.cuda.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::cha
r_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@
VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencv
GPU\build\modules\world\opencv_world.vcxproj]
pct_signatures.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std
::char_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefault
Name@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\o
pencvGPU\build\modules\world\opencv_world.vcxproj]
grayscale_bitmap.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct s
td::char_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefau
ltName@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang
\opencvGPU\build\modules\world\opencv_world.vcxproj]
pct_clusterizer.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct st
d::char_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaul
tName@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\
opencvGPU\build\modules\world\opencv_world.vcxproj]
pct_sampler.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::c
har_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultNam
e@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\open
cvGPU\build\modules\world\opencv_world.vcxproj]
harris_lapace_detector.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,st
ruct std::char_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?ge
tDefaultName@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\Stev
enWang\opencvGPU\build\modules\world\opencv_world.vcxproj]
latch.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_tr
aits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@
xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\
build\modules\world\opencv_world.vcxproj]
lucid.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_tr
aits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@
xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\
build\modules\world\opencv_world.vcxproj]
msd.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_trai
ts<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@xf
eatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\bu
ild\modules\world\opencv_world.vcxproj]
daisy.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_tr
aits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@
xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\
build\modules\world\opencv_world.vcxproj]
ellipticKeyPoint.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct s
td::char_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefau
ltName@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang
\opencvGPU\build\modules\world\opencv_world.vcxproj]
freak.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_tr
aits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@
xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\
build\modules\world\opencv_world.vcxproj]
gms.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_trai
ts<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@xf
eatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\bu
ild\modules\world\opencv_world.vcxproj]
affine_feature2d.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct s
td::char_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefau
ltName@VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang
\opencvGPU\build\modules\world\opencv_world.vcxproj]
beblid.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_t
raits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG
@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU
\build\modules\world\opencv_world.vcxproj]
boostdesc.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::cha
r_traits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@
VGG@xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencv
GPU\build\modules\world\opencv_world.vcxproj]
brief.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_tr
aits<char>,class std::allocator<char> > __cdecl cv::xfeatures2d::VGG::getDefaultName(void)const " (?getDefaultName@VGG@
xfeatures2d@cv@@UEBA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) [C:\Users\StevenWang\opencvGPU\
build\modules\world\opencv_world.vcxproj]
C:\Users\StevenWang\opencvGPU\build\bin\Release\opencv_world4100.dll : fatal error LNK1120: 1 unresolved externals [C:\
Users\StevenWang\opencvGPU\build\modules\world\opencv_world.vcxproj]
  test_intrin128.avx.cpp
  opencv_test_core_AVX.vcxproj -> C:\Users\StevenWang\opencvGPU\build\modules\world\opencv_test_core_AVX.dir\Release\op
  encv_test_core_AVX.lib
  test_intrin128.avx2.cpp
  test_intrin256.avx2.cpp
  opencv_test_core_AVX2.vcxproj -> C:\Users\StevenWang\opencvGPU\build\modules\world\opencv_test_core_AVX2.dir\Release\
  opencv_test_core_AVX2.lib
  test_intrin128.avx512_skx.cpp
  test_intrin256.avx512_skx.cpp
  test_intrin512.avx512_skx.cpp
  opencv_test_core_AVX512_SKX.vcxproj -> C:\Users\StevenWang\opencvGPU\build\modules\world\opencv_test_core_AVX512_SKX.
  dir\Release\opencv_test_core_AVX512_SKX.lib
  test_intrin128.fp16.cpp
  opencv_test_core_FP16.vcxproj -> C:\Users\StevenWang\opencvGPU\build\modules\world\opencv_test_core_FP16.dir\Release\
  opencv_test_core_FP16.lib
  test_intrin128.sse2.cpp
  opencv_test_core_SSE2.vcxproj -> C:\Users\StevenWang\opencvGPU\build\modules\world\opencv_test_core_SSE2.dir\Release\
  opencv_test_core_SSE2.lib
  test_intrin128.sse3.cpp
  opencv_test_core_SSE3.vcxproj -> C:\Users\StevenWang\opencvGPU\build\modules\world\opencv_test_core_SSE3.dir\Release\
  opencv_test_core_SSE3.lib
  test_intrin128.ssse3.cpp
  test_intrin128.sse4_1.cpp
  opencv_test_core_SSE4_1.vcxproj -> C:\Users\StevenWang\opencvGPU\build\modules\world\opencv_test_core_SSE4_1.dir\Rele
  ase\opencv_test_core_SSE4_1.lib
  test_intrin128.sse4_2.cpp
  opencv_test_core_SSE4_2.vcxproj -> C:\Users\StevenWang\opencvGPU\build\modules\world\opencv_test_core_SSE4_2.dir\Rele
  ase\opencv_test_core_SSE4_2.lib

C:\Users\StevenWang>

cudawarped · July 1, 2024, 7:49am

Can you post your CMake configuration output please so we can see your OpenCV/CUDA/cuDNN/Visual Studio/CMake etc. versions?

If you are following those guides then it might be an idea to ask the authors of them as they will know exactly why they configured OpenCVusing the options they did and what the usual errors are associated with their interesting configuration choices e.g. why :

Recommend WITH_CUDA, ENABLE_FAST_MATH?
Use CUDA_ARCH_BIN and not just CUDA_GENERATION=Auto?
Change CMAKE_CONFIGURATION_TYPES with Visual Studio?
Use the CMake GUI when building OpenCV with CUDA at all, and then why use the command line to build it instead of Visual Studio to build?
Not use ninja which is probably 5 times faster at building OpenCV with CUDA than Visual Studio?
etc.

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OpenCV+CUDA+VS 2022: fatal error LNK1120: 1 unresolved externals [opencv_world.vcxproj]

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