Intel OneAPI Base Toolkit 2025.3 Visual Studio 2026 Integration error

[Divyanshu1]

My corporation is using Intel OneApi Mkl toolkit in one of our projects, VS 2026 professional is not able to read following header files:

- mkl_vsl_types.h
- mkl_dfti.h

- mkl_df.h

- mkl.h

- mkl_service.h

- mkl_vml.h

We are also using VS 2022 and it reads all header files perfectly, I am sharing screenshot of the error. Please provide solution for the same.

[danielbrown8998]

Issue occurs because Intel oneAPI Base Toolkit 2025.3 does not automatically integrate with Visual Studio 2026. As a result, Visual Studio cannot locate MKL header files like mkl.h, mkl_dfti.h, mkl_vml.h, etc.

Fix:

Add the MKL include path manually.

Project → Properties → C/C++ → General → Additional Include Directories

Add:
C:\Program Files (x86)\Intel\oneAPI\mkl\latest\include

Also add library path:

Project → Properties → Linker → General → Additional Library Directories

Add:
C:\Program Files (x86)\Intel\oneAPI\mkl\latest\lib\intel64

After adding these paths, Visual Studio 2026 should be able to detect all MKL header files.

[Divyanshu1]

It detected the mkl header files but now I am seeing linker errors, also 1 strange thing is my cpp project properties in VS 2026 doesnt show settings option for Intel performance libraries but in VS 2022 i see that..(Please see screenshot)

Linker errors are related to Convolution, FFT, Interpolation, LinearAlgebra, MatrixMath etc, all these object files - See screenshot