Hi,
I want to make use of some C routines from other packages to write extensions in C. In "Writing R Extensions", it says there is an experimental interface to support this in (or from ?) R 2.4.0. I had a dummy library containing src/dummy.cpp and R/zzz.R: ====== src/dummy.cpp ==== #include <R.h> #include <Rinternals.h> #include <R_ext/Rdynload.h> extern "C" { void dummy(int *a, int *b) { printf("dummy\n"); } } void R_init_dummy(DllInfo *dll) { R_RegisterCCallable("dummy", "dummy", (DL_FUNC)dummy); } ====== R/zzz.R ========= .First.lib <- function(lib, pkg) { library.dynam("dummy", pkg, lib) } ====================== I can compile this using R 2.5.0 under Linux. But I got the following error when I tried to load the library >library(dummy): Error in dyn.load(x, as.logical(local), as.logical(now)) : unable to load shared library '/homes/ychen/Rlibs/dummy/libs/dummy.so': /homes/ychen/Rlibs/dummy/libs/dummy.so: undefined symbol: _Z19R_RegisterCCallablePcS_PFPvvE Error in library(dummy) : .First.lib failed for 'dummy' Can anyone help me out? Thanks! Alex [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch 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.