[Rd] registering Fortran routines in R packages

[Berend Hasselman]

Christophe, 

> On 10 May 2017, at 08:08, Christophe Dutang <dutangc at gmail.com> wrote:
> 
> Thanks for your email.
> 
> I try to change the name in lowercase but it conflicts with a C implementation also named halton. So I rename the C function halton2() and sobol2() while the Fortran function are HALTON() and SOBOL() (I also try lower case in the Fortran code). Unfortunately, it does not help since I get
> 
> init.c:97:25: error: use of undeclared identifier 'halton_'; did you mean 'halton2'?
>   {"halton", (DL_FUNC) &F77_SUB(halton),  7},
> 
> My current solution is to comment FortEntries array and use R_useDynamicSymbols(dll, TRUE) for a dynamic search of Fortran routines.

Have a look at my package geigen and its init.c.
Could it be that you are missing extern declarations for the Fortran routines?


Berend