smcguffee wrote: > > You are right, I looked and I did find the R source code. However, it's > largely written in R! I mean, I don't know how to trace the R code where > INSTALL is recognized and follow it to a c or c++ level command. For > example > these are hits in .R files, not c files, and I don't know how to connect > > ... > > If you could point me to the functions that are called a c or c++ level, > I'd > love to see what R is doing for myself. > Thanks! > Sean >
Hi Sean! Along with many other people in this thread, I would strongly recommend a top-down approach to this. Build a package, stick some stuff in the src folder, run R CMD INSTALL on it and see what happens. The reason I recommend this approach is that it lets you focus on writing a package that does something useful rather than the nuts and bolts of cross platform compilation and installation. R CMD INSTALL takes care of this for you automagically and it is very good at what it does. I wrote a post some time back about building an example package from scratch that contains C code: http://r.789695.n4.nabble.com/Writing-own-simulation-function-in-C-td1580190.html#a1580423 It begins with the using the package.skeleton() function to kickstart things, discusses how to make sure the compiled code is dynamically loaded when a user runs library(your_package) and even discusses how to call R functions from inside of C functions and vice-versa. The example code is still available and I'm sure it could be generalized to C++ quite easily. There are also some other responses in that thread that offer useful advice. At the beginning it is just best to treat R CMD INSTALL as a magical unicorn that gets you where you need to go: http://abstrusegoose.com/120 (keep clicking the images to get the full story) If you are absolutely, positively dying to know what really happens... well, the relative files in the R source are `src/library/tools/R/install.R` and `src/library/tools/R/build.R`. But seriously. Magical unicorn. Takes care of the hard stuff so you can build awesome packages. Hope this helps! -Charlie ----- Charlie Sharpsteen Undergraduate-- Environmental Resources Engineering Humboldt State University -- View this message in context: http://r.789695.n4.nabble.com/FW-Rcpp-devel-Question-on-5-6-Interfacing-C-code-tp3465257p3467221.html Sent from the R devel mailing list archive at Nabble.com. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
