[R] Error when calling a dll procedure
Bernd Holleczek
bernd.holleczek at gmx.de
Sun Nov 16 20:26:38 CET 2003
Dear experts,
I am a beginner in R and try to build dlls (Win XP, MinGW, R 1.7.1).
So far, I have managed to create and to use some dlls with C code which
worked properly.
Now I am stuck with a dll containing C++ code.
I have included some part of the source code (of an implementation of a
function to find all primes below a given numeric value -> its just an
exercises
to get familar with R/C++).
>#include <vector>
>
>using namespace std;
>
>extern "C" {
>#include <R.h>
>#include <Rdefines.h>
>}
>
>SEXP getPrimes(SEXP a)
>{
>SEXP c;
>
//my implementation
>
>return c;
>}
Here is the output (hopefully without any typos) of the process building the
dll:
>Rcmd SHLIB Primes.cc
>making Primes.d from Primes.c
>g++ -IE:\programs\R\rw1071\src\include -Wall -02 -c Primes.cc -o Primes.o
>ar cr Primes.a *.o
>ranlib Primes.a
>g++ --shared -s -o Primes.dll Primes.def Primes.a
-LE:\programs\R\rw1071\src\gnuwin32 -lg2c -lR
My PROBLEM is now that I can load the dll (no error message), but not access
the function "getPrimes". Here is some output of the R console:
>> dyn.load("E:\\R_work5\\Primes")
>> .Call("getPrimes", 100)
>Error in .Call("getPrimes", 100) : .Call function name not in load table
Has anybody been confronted with the same kind of difficulties?
I'll appreciate suggestions on how to fix the problem.
Thanks.
Regards,
Bernd Holleczek
--
Bernd Holleczek <bernd.holleczek at gmx.de>
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