Hi - I am developing an R package (OSX 10.8.5, R version 3.0.2) with both C and fortran code and noticed strange behavior when trying to unload the shared-object after dyn.load (part of devtools development workflow). When I try to dyn.unload, the R prompt appears again, but I can't run any more commands and I find the R process is taking 100% cpu (per htop).
I get the problem behavior when using command line R (but not R.app or Rstudio) and can't recreate it on Ubuntu. Also, this only seems to happen with fortran code, not C code (a simple C example compiles, loads and unloads fine). So my package seems to work fine, but I get into trouble with dyn.unload in the development cycle when fortran code is in the mix. Wondering why this is happening and how I can setup commandline R on OSX to handle this dyn.unload more gracefully (as R.app does). An example and R info below. Thank you in advance, Kyle Kyle Baron Metrum Research Group www.metrumrg.com I was able to recreate the issue using this toy fortran code: C ***************************************** C http://users.stat.umn.edu/~geyer/rc/bar.f subroutine bar(n, x) integer n double precision x(n) integer i do 100 i = 1, n x(i) = x(i) ** 2 100 continue end C end bar.f C ****************************************** bash$ R CMD SHLIB bar.f llvm-gcc-4.2 -arch x86_64 -std=gnu99 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/usr/local/lib -L/usr/local/lib -o bar.so bar.o -L/usr/local/lib/gcc/i686-apple-darwin8/4.2.3/x86_64 -L/usr/local/lib/x86_64 -L/usr/local/lib/gcc/i686-apple-darwin8/4.2.3 -lgfortran -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation R: > dyn.load("bar.so") > is.loaded("bar") [1] TRUE > dyn.unload("bar.so") > is.loaded("bar") ## FALSE if R.app, Rstudio, can't run the command if > commandline R on OSX and must restart R > sessionInfo() R version 3.0.2 (2013-09-25) Platform: x86_64-apple-darwin10.8.0 (64-bit) locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats grDevices utils datasets graphics methods base _______________________________________________ R-SIG-Mac mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-mac
