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# Wrapped DGEMM
This code sample is calling DGEMM and there is no dependency on the LIBXSMM API as it only relies on LAPACK/BLAS interface. Two variants are linked when building the source code: (1) code which is dynamically linked against LAPACK/BLAS, (2) code which is linked using `--wrap=`*symbol* as possible when using a GNU GCC compatible tool chain. For more information, see the [Call Wrapper](https://libxsmm.readthedocs.io/libxsmm_mm/#call-wrapper) section of the reference documentation.
The same (source-)code will execute in three flavors when running `dgemm-test.sh`: (1) code variant which is dynamically linked against the originally supplied LAPACK/BLAS library, (2) code variant which is linked using the wrapper mechanism of the GNU GCC tool chain, and (3) the first code but using the LD_PRELOAD mechanism (available under Linux).
**Command Line Interface (CLI)**
* Optionally takes the number of repeated DGEMM calls
* Shows the performance of the workload (wall time)
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