Unable to run BLAS and LAPACK examples

[Feng__Jesse]

I just learned that Intel has LAPACK installed in the oneAPI base toolkit but when testing the example codes such as https://www.intel.com/content/www/us/en/docs/onemkl/developer-reference-fortran/2024-2/blas-code-examples.html and https://www.intel.com/content/www/us/en/docs/onemkl/code-samples-lapack/2024-1/cgesv-example-fortran.html I am unable to compile. I get the following errors:

Severity Code Description Project File Line Suppression State
Error error LNK2019: unresolved external symbol SDOT referenced in function SDOT.void Test.obj

Severity Code Description Project File Line Suppression State
Error error LNK2019: unresolved external symbol CGESV referenced in function CGESV.t272p.t273p.t274p.t275p.t276p.t277p.t278p.t279p Test.obj

I simply created a main program code Fortran project and pasted the example codes in and saved the source code as test.for.

I double checked the installation and confirmed that I used default which did install the Intel MKL when I installed base and HPC toolkits. How do I properly link these libraries? I tried to read the documentation for Intel MKL and I failed to find the page that gave instructions on linking the libraries, if anyone can point me to the page that would also work. Thanks!

[andrew_4619 · Accepted solution]

You need to tell the project you are using mkl:

[Feng__Jesse]

Thanks, Andrew. Is dgeqrf the QR decomposition subroutine? More importantly, the ?geqrf page says the subroutines return "elementary reflectors for Q", does that mean it uses the householder reflection implementation? I currently have a custom-implemented QR decomposition using the Gram-Schmidt approach but it can become unstable while the householder approach should be much better.

[andrew_4619]

My knowledge of mkl routines is pretty minimal, there are some on here that have in depth knowledge but there is also an mkl forum.