[R] dyn.load problem

[Uwe Ligges]

O. Neto wrote:

> Hi R-Users
> 
>     I wrote 1 week ago asking about a message that appears when I try run
> dyn.load.
>    I'm trying to do an example in C code from "Writing R Extension"  to
> learn how to do it.
>     I have  R 2.0.0, Rtools, Perl and MinGW as describe  in
> http://www.murdoch-sutherland.com/Rtools/ with path sets.

Really, *really* sure you have followed all of readme.packages?
Works for me.

>  When I use C:\R\rw2000\bin>RCMD SHLIB -o C:/dev-cpp/teste.dll
> C:/dev-cpp/conv.c

What is the output?


> a teste.dll is created without error and located in that directory, but when
> I use it in RGui with "Change dir" set to C:/dev-cpp :
  >

> 
>>dyn.load("teste.dll")  results:
> 
> Error in dyn.load(x, as.logical(local), as.logical(now)) :
>         unable to load shared library "C:/Dev-Cpp/teste":
>   LoadLibrary failure:  Parâmetro incorreto. (Incorrect Parameter)
> 
> My C code is (extracted form Writing R Extension):
> 
> #include <R.h>
>      #include <Rinternals.h>
>      SEXP convolve2(SEXP a, SEXP b)
>      {
>        R_len_t i, j, na, nb, nab;
>        double *xa, *xb, *xab;
>        SEXP ab;
> 
>        PROTECT(a = coerceVector(a, REALSXP));
>        PROTECT(b = coerceVector(b, REALSXP));
>        na = length(a); nb = length(b); nab = na + nb - 1;
>        PROTECT(ab = allocVector(REALSXP, nab));
>        xa = REAL(a); xb = REAL(b);
>        xab = REAL(ab);
>        for(i = 0; i < nab; i++) xab[i] = 0.0;
>        for(i = 0; i < na; i++)
>          for(j = 0; j < nb; j++) xab[i + j] += xa[i] * xb[j];
>        UNPROTECT(3);
>        return(ab);
>      }
> 
>     I´m using RCMD under Windows ME.
> 
>    How can I fix this? Someone can help me ? Prof. Ripley told me to catch
> more information debbuging this DLL. Is it hard to do this one under
> Windows? It´s necessary modify  files SHLIB or MkDLL?

Not that easy as under Linux, at least.


Uwe Ligges

> 
> Thanks
> 
> O. Neto
> 
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