A character vector of length one ("" when the name is not known).
  The value can be used as an indication of which LAPACK
  implementation is in use.  Typically, the R version of LAPACK will
  appear as libRlapack.so (libRlapack.dylib), depending on how
  R was built.  Note that libRlapack.so (libRlapack.dylib) may
  also be shown for an external LAPACK implementation that had been
  copied, hard-linked or renamed by the system administrator.  Otherwise,
  the shared object file will be given and its path/name may indicate
  the vendor/version.  The detection does not work on Windows.