undefined reference to `sgemm_' When compiling vector DB

[Jamesyang2333]

I tried to compile with the vector DB option by setting -DWITH_FB_VECTORDB=1 in cmake.

However, I encountered the "undefined reference to `sgemm_'" error when compiling the faiss library. I was using OpenBlas and this issue seemed to be missing link to Lapack library. Anyone knows how to fix this?