[cmake] Support "Generic" BLAS (#14699) (#37276)
Summary:
The "Generic" BLAS refers to the Netlib BLAS. This option is meaningful
to the Debian family due to the "update-alternatives" mechanism, which
enables the user to switch the libblas.so providers between different
implementations at runtime, such as ATLAS, OpenBLAS, and Intel MKL.
Such, building against generic BLAS provides much flexibility.
This new option is not documented in setup.py because it's only supposed
to be used by linux distro (especially Debian family) developersonly.
ezyang
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37276
Differential Revision: D21256877
Pulled By: ezyang
fbshipit-source-id: 55a5356653a1cfc763a5699b04afe5938f2007ec
