Calling C++ out of R using rstudio

Calling C++ out of R using rstudio to create an R package
C++ code: cmll.cpp,   cmll.h,   test.cpp,   Makefile,   test.R,  
movie showing how it is done in rstudio

Before you look at the movie, just do /file/new project/new directory in rstudio and see
what choices you get.