Hello, again. I'm interested to learn how programmers develop & test C/C++ code with R packages in Linux. I've been reading R source and the manual on Writing R Extensions but there are just a couple of details I can't understand. I wish I could watch over a developer's shoulder to see how people actually do this.
I've tested a bit. I am able to take package.tar.gz file, open it up, fiddle the source code, and then run R CMD check package-dir from the directory above "package-dir" , R CMD build package-dir and R CMD INSTALL on the tarball that is produced. Then in R, I can load the package and use it. That part is "all good", but somewhat tedious. I don't want to entirely recompile and reinstall the whole package just to test one function. I notice that R CMD check creates a new directory called "package.Rcheck" and the shared objects and example code of the package are in there. Can I force R to use those *.so files instead of the ones in /usr/lib/R ? I also wonder "what is wrong with gprof? In the Writing R Extensions manual, it describes "oprofile" and "sprof" for Linux. I will try them, but they are unfamilar to me. I've used gprof in the past in C projects, and it is a pretty painless thing to add a compiler flag -pg, run the program, and then review gmon.out. The Writing R Extensions manual does not mention gprof in its section on Linux, but it does mention it under Solaris. There is a somewhat ambiguous statement: 3.4.2 Solaris On 64-bit (only) Solaris, the standard profiling tool gprof collects information from shared libraries compiled with -pg. Does "(only)" here mean to differentiate Solaris from other Linux/Unix systems? Or does it differentiate 64bit Solaris from other Solaris? But this draws me back to the basic question. I don't want to run R CMD INSTALL 20 times per hour. How do developers "actually" test their code? pj -- Paul E. Johnson Professor, Political Science 1541 Lilac Lane, Room 504 University of Kansas ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel