Custom C++ Library gives error: Intel MKL ERROR: Parameter 8 was incorrect on entry to DGEMM when using armadillo despite working perfectly fine in standalone C++

I am currently developing a MATLAB wrapper for a underlying library built with the armadillo matrix library, using openBLAS, LAPACK, SUPERLU and Arpack. Unfortunately I get the error above. I have tracked the error down to an incompatibility with the version of intel MKL that MATLAB ships with and openBLAS/LAPACK - is there any way to force MATLAB to use the system versions of openBLAS and LAPACK rather than the problematic MKL it ships with?

Answer 1

[Anshuman]

Hi Matthew,

If you want to use the system versions of openBLAS and LAPACK instead of the bundled MKL(Math Kernel Library), you can try the following steps:

1. Set the 'LD_PRELOAD' Environment Variable: Before launching MATLAB, you can set the 'LD_PRELOAD' environment variable to force it to use the system versions of openBLAS and LAPACK. This variable specifies a list of shared libraries to be loaded before all others. Open a terminal and enter the following command:

export LD_PRELOAD=/path/to/openBLAS.so:/path/to/LAPACK.so

Replace '/path/to/openBLAS.so' and '/path/to/LAPACK.so' with the actual paths to your system versions of openBLAS and LAPACK libraries.

2. After setting the 'LD_PRELOAD' environment variable, launch MATLAB from the same terminal window. MATLAB should now use the specified system versions of openBLAS and LAPACK for linear algebra operations.

Hope it helps!