RcppEnsmallen is best used within an R package. The setup
for RcppEnsmallen’s use mirrors that of other
Rcpp-based projects. In particular, the
DESCRIPTION file requires the LinkingTo field
and two files inside the src/ to establish the necessary
compilation options. In the next two sections, we show the
modifications.
Open your R package’s DESCRIPTION file. Ensure that the
LinkingTo directive is present and contains:
Next, the src/ directory must contain both a
Makevars and Makevars.win file. Each file must
have the same contents of:
PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS)
PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)The Makevars.win file provides the appropriate
configuration for Windows while Makevars acts on Unix-alike
systems like macOS, Linux, and Solaris.