[R-pkg-devel] [External] Another DLL requires the use of native symbols thread
Take another look at R-exts, specifically https://cran.r-project.org/doc/manuals/R-exts.html#Registering-native-routines Your call R_forceSymbols(dll, TRUE); says you want foreign function calls to only work with entry points specified by R objects representing native symbols. This was not being enforced but is now in R devel. Your NAMESPACE file directive useDynLib(splines, .registration = TRUE, .fixes = "C_") says that these R objects should use a C_ prefix, so your .Fortran call should be res <- .Fortran(C_bt, as.double(Temp), as.double(y), as.integer(icode)) So you can either fix your .Fortran call to be consistent with what you have asked R to use, or drop the R_forceSymbols call. Best, luke
On Sat, 25 Mar 2023, 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?
Shawn Way
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