[R] Help with DLLs

[ripley@stats.ox.ac.uk]

DO read readme.packages.

1) Did you export the symbols from your DLL?  It's the most common fault.
pedump will tell you, as will dump under VC++6 (at least).

2) .Fortran is designed for use with g77, and whatever you are using
(I was unaware that  Developer Studio 97 contained a Fortran compiler)
may well be using different conventions, so readme.packages tells you to
use .C with the name-mangled symbol produced.

3) The recommended compilers for use with R for Windows are *free*.
You are likely to find it much easier to follow the recommendations.

On Thu, 17 Oct 2002, Jane L. Harvill wrote:

> I'm using R version 1.5.1, and Microsoft Developer Studio 97 (yes, I know
> it's old, but it's expensive to upgrade) on Windows 98.  I created the DLL
> file with the compiler.  The name of the file containing the subroutine is
> leaf.f and the subroutine is named leaf.f. In my R program (which defines
                                     ^^^^^^
Really?  Not leaf?

> a function called leaf), I have
> 	x <- .Fortran("leaf",...)
> where the ... are the arguments passed.  I source("leaf.s"), and then
> dyn.load("leaf.dll"), and when I run leaf(100), I get the following error
>
> Error in .Fortran("leaf",as.integer(nn),as.double(u),as.double(A), :
>          C/Fortran function name not in load table
>
> Does anyone know what is causing this error message and how to fix the
> problem?
> Incidentally, the same code works FINE on the Unix version of R, but I was
> hoping to transfer it to my PC so that I could use it in a presentation
> without having to rely on an unreliable internet connection.
>
> Any words of wisdom are greatly appreciated.
>
> Sincerely,
> Jane Harvill
>
>
>
> Dr. Jane L. Harvill, Ph.D.
> Department of Mathematics and Statistics
> Drawer MA
> Mississippi State, Mississippi 39762
> Phone: (662) 325-3414
> FAX:   (662) 325-0005
> URL:   http://www2.msstate.edu/~harvill/
>
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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