libopenblas-serial-dev 0.3.7+ds-6 (armhf binary) in ubuntu focal

 OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.
 .
 Unlike Atlas, OpenBLAS provides a multiple architecture library.
 .
 All kernel will be included in the library and dynamically switched to
 the best architecture at run time (only on amd64, arm64 and i386).
 .
 This package includes the static libraries and symbolic links
 needed for program development.
 .
 Configuration: USE_THREAD=0 USE_OPENMP=0 INTERFACE64=0