Hi all, I tried SO for this, but got no response. Trying here in hope of better luck. ---------------------------------------------------------------------------------------------------------- I am trying to build an R package that uses some C code. I have a C library that is compiled into an executable, that can be called from the command line. There is a Makefile associated with it. I am trying to grok the information [here][1], where it says > If you want to create and then link to a library, say using code in a > subdirectory, use something like .PHONY: all mylibs all: $(SHLIB) $(SHLIB): mylibs mylibs: (cd subdir; make) > Be careful to create all the necessary dependencies, as there is a no > guarantee that the dependencies of all > will be run in a particular order (and some of the CRAN build machines > use multiple CPUs and parallel makes). If I create a new subdirectory of the `src` folder in my package, called `someLibrary`, with the code and Makefile unchanged, and in turn, in the original `Makevars` file for my package I add the above code unchanged, then I will be able to build that shared library to be exported using `useDynLib`? ---- Edit 1: ---- Following information [here][2], I changed the `Makefile` to create a shared library by adding CFLAG = -fPIC -g -O3 LDFLAGS= -shared However, this leads to the problem that the `.so` file is not exported directly to the `libs` directory of the package. If I hard code the path into the target, then the file is sent to the `libs` directory of the package (this is all by the way of calls to `R CMD INSTALL myPackage`). ---- Edit 2: ---- Lastly, I would like to know how to make calls to the shared library, given that it has a `main()` method that I could call from the command line executable. What is the procedure to expose this to the R `NAMESPACE`, so that it can be called via `.Call`? PS. Please let me know if I should make the last bit a separate question. [1]: http://cran.r-project.org/doc/manuals/R-exts.html#Using-Makevars [2]: http://stackoverflow.com/questions/8096015/creating-a-simple-make-file-to-create-a-shared-library-whats-wrong-with-this-m ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
