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LNK2019 unresolved external symbol _DGEMM referenced in function [...]

Hi,

I want to use dgemm function from mkl lib in my (C++) program but i keep getting linking error... could you please help me with this?

I included the lib (i.e. #include "include/mkl.h"), I think it should run...

Thanks in advance...

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Gennady_F_Intel
Moderator
262 Views

Please take a look at the MKL_Linker_Adviser  to see how to link with Intel MKL 

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Could you please give me more information? I still can't link with intel MKL with those info...

- I've already manually set the path to include (.h) and lib files (at the property pages - "VC++ directories)

- then in the linker-input I added the lib names to the additional dependencies.

This link you've sent to me gave me the following info, which I don't know what to do with:
===========
Use this link line: 
 mkl_scalapack_ilp64.lib mkl_cdft_core.lib mkl_intel_ilp64.lib mkl_sequential.lib mkl_core.lib mkl_blacs_intelmpi_ilp64.lib impi.lib

Compiler options: 
 /DMKL_ILP64 -I"%MKLROOT%"\include
===========

I tried to copy the "mkl_scalapack_ilp64.lib mkl_cdft_core.lib mkl_intel_ilp64.lib mkl_sequential.lib mkl_core.lib mkl_blacs_intelmpi_ilp64.lib impi.lib" to the additional dependecies, but I get lnk1104 error "cannot open"

thanks in advance

Gennady_F_Intel
Moderator
262 Views

You may check this article to show how to build mkl examples from VS follow this link: https://software.intel.com/en-us/articles/intel-math-kernel-library-intel-mkl-compiling-and-linking-with-microsoft-visual-cc and We recommend you to see at the existing mkl's examples ( mklroot/examples) and check mkl_user_quide

262 Views

Well

It ended up that what helped me was to look for the "automatic linking" in the user guide

Now I have another problem. I can build the solution, but when I run I get the following error:

"The ordinal 242 could not be located in the dynamic link library c:\Program Files (x86)\IntelSWTolls\compilers_and_libraries_2019.4.245\windows\redist\intel64\mkl\mkl_intel_thread.dll"

Can you help me with that?

Gennady_F_Intel
Moderator
262 Views

Do you see this dll into c:\Program Files (x86)\IntelSWTolls\compilers_and_libraries_2019.4.245\windows\redist\intel64\mkl\ directory? 

262 Views

Yes, mkl_intel_thread.dll is there

Gennady_F_Intel
Moderator
262 Views

then check the paths into your system... or just put the .exe file into this \redist\intel64\mkl\ directory and try to run

262 Views

The path is right.

" or just put the .exe file into this \redist\intel64\mkl\ directory and try to run"

Could you explain better? Which .exe file you mean? My code doesn't have an .exe file

Gennady_F_Intel
Moderator
262 Views

Do you see the executable file under somewhere under \x64\Debug (or Release)\ directory? 

262 Views

I think I've made it... don't ask me why but what I did was to change a setting from the automatic linking:

Project>Properties>Configuration Properties>Intel Performance Libraries.

Use MKL property it was selected Parallel, I changed to Sequential

Thanks

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