[R-pkg-devel] Another DLL requires the use of native symbols thread

[Duncan Murdoch]

The message says you shouldn't be using the string 'BT' in the .Fortran 
call, you should be using the object that was produced by 
R_registerRoutines.  That's probably named BT (without any quotes), 
though you can add a prefix in useDynLib() in your NAMESPACE file.

So your call should look like this:

   res <- .Fortran(BT, as.double(Temp), as.double(y), as.integer(icode))

Duncan Murdoch

On 25/03/2023 9:01 a.m., Shawn Way wrote:
> Sorry to kind of repeat this but I really didn't understand the issues with the prior thread and how it relates to my issue.
> 
> I'm getting the error message in
> 
>      B_T <- BT(Temp)
>      Error in BT(Temp) : DLL requires the use of native symbols
>      Execution halted
> 
> And frankly, I have no idea what this means.  The function call is pretty simple and meets the requirement of .Fortran
> 
> res <- .Fortran('BT', as.double(Temp), as.double(y), as.integer(icode))
> 
> and the following matches the R-ext's method for using registration:
> 
> extern void F77_NAME(bt)(double *T, double *B, int *icode);
> 
> void R_init_IAPWS95(DllInfo *dll)
> {
>    R_registerRoutines(dll, NULL, NULL, FortranEntries, NULL);
>    R_useDynamicSymbols(dll, FALSE);
>    R_forceSymbols(dll, TRUE);
> }
> 
> With
> 
> static const R_FortranMethodDef FortranEntries[] = {
>    {"bt",        (DL_FUNC) &F77_NAME(bt),        3},
>    {NULL, NULL, 0}
> };
> 
> Furthermore the NAMESPACE includes:
> 
> useDynLib(splines, .registration = TRUE, .fixes = "C_")
> 
> 
> which matches R-ext.
> 
> Since this is only occurring on the Linux versions for the software and I use windows, can someone point me in the right direction to fix this error?