R help - Jan 2003 - Interfacing R and C++ under Windows

Dear all, 

My colleague, who has been helping me with wrapping some older C++ code for use
in R, has been running into some issues, which he asked me to post here:

- ERROR is defined in RS.h which is included in Rdefines.h which conflicts with
Visual Studio's ERROR
- TRACE is defined in Rinternals.h which conflicts with Visual Studio's
TRACE
- math.h is included within extern "C" linkage in R.h, however Visual
Studio's math.h includes templates which are only valid in C++

Basically, he feels that there are some clear conflicts between what R expects
of C++ and what Visual C++ does. So, while the simpler .C technique can be used,
the .Call approach does not work. What are we missing here?


Thank you!

Pijus

On Fri, 3 Jan 2003, Pijus Virketis wrote:
> My colleague, who has been helping me with wrapping some older C++ code for
use in R, has been running into some issues, which he asked me to post here:
>
> - ERROR is defined in RS.h which is included in Rdefines.h which conflicts
with Visual Studio's ERROR
> - TRACE is defined in Rinternals.h which conflicts with Visual Studio's
TRACE
> - math.h is included within extern "C" linkage in R.h, however
Visual Studio's math.h includes templates which are only valid in C++
>
> Basically, he feels that there are some clear conflicts between what
R expects of C++ and what Visual C++ does. So, while the simpler .C
technique can be used, the .Call approach does not work. What are we missing
here?

A real C++ compiler (and enough netiquette to wrap your lines).

Why are you using VC++ with R: it is most definitely not the recommended C
compiler?  Using standard C++ and the recommended compiler usually works,
modulo undefining symbols defined in windows.h or its dependencies.


-- 
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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595