[R] Error in dyn.load

Thomas W Blackwell tblackw at umich.edu
Tue Sep 2 00:20:12 CEST 2003

Philip  -

Why not compile and load using the unix command line:

R CMD SHLIB <files>

rather than try to write your own compiler flags ?

See  help("SHLIB"),  help("COMPILE")  inside R.

You may have a good reason for NOT going the ordinary
route, but you need to tell us what it is.  And do try
the ordinary method for us, first, and please tell us
what difficulties you encounter there.

-  tom blackwell  -  u michigan medical school  -  ann arbor  -

On Mon, 1 Sep 2003, Philip Silva wrote:

> I've created a shared library from including this code
> (with g++ -I/usr/local/lib/R/include -I/usr/local/include -c Rtest.cpp;
> g++ -shared -L/usr/local/lib -o Rtest.so Rtest.cpp):
> void check_data (SEXP data) {
> 	int l=length (data);
> }
> But when I try to load it in R I get this error message:
> unable to load shared library ...
> ...
>   undefined symbol: _Z9Rf_lengthP7SEXPREC
> How can I solve this problem?
> Philip

More information about the R-help mailing list