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% File src/library/base/man/La_library.Rd
% Part of the R package, https://www.R-project.org
% Copyright 2013-2022 R Core Team
% Distributed under GPL 2 or later

\name{La_library}
\alias{La_library}
\title{
  LAPACK Library
}
\description{
  Report the name of the shared object file with \code{LAPACK} implementation
  in use.
}
\usage{
La_library()
}
\value{
  A character vector of length one (\code{""} when the name is not known).
  The value can be used as an indication of which \code{LAPACK}
  implementation is in use.  Typically, the \R version of \code{LAPACK} will
  appear as \code{libRlapack.so} (\code{libRlapack.dylib}), depending on how
  R was built.  Note that \code{libRlapack.so} (\code{libRlapack.dylib}) may
  also be shown for an external \code{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, nor for the Accelerate
  framework on macOS, nor in the rare (and unsupported) case of a static
  external library.

  It is possible to build \R against an enhanced BLAS which contains
  some but not all LAPACK routines, in which case this function reports
  the library containing routine \code{ILAVER}.
}
\seealso{
  \code{\link{extSoftVersion}} for versions of other third-party software
  including \code{BLAS}.

  \code{\link{La_version}} for the version of LAPACK in use.
}
\examples{
La_library()
}
\keyword{utilities}