Report the name of the shared object file with LAPACK implementation
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.
extSoftVersion for versions of other third-party software