This is in R-exts. If the Fortran subroutine is called `dqrfit', you would
use something like:
F77_CALL(dqrfit)(...);
All arguments need to be pointers, as Fortran passes by reference.
Andy
> From: James Bullard
>
> Hello, I had a question about calling some of R's fortran
> routines from C.
> Specifically, I would like to call: dqrfit from some C code
> which will be
> bundled as an R package. I was hoping someone knew of an
> example in some
> of R's code which does something like this (any fortran call
> from R's C
> would probably be a sufficient guide). So far I can only find
> locations
> where R calls the Fortran directly, but this is not an option for me.
>
> Also, I am trying to gauge the overhead of making this call,
> does anyone
> have any knowledge of whether there might be some non-trivial
> constant
> time penalty on making such a call.
>
> Thanks in advance, Jim
>
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