[Rd] Standalone Mathlib, C++ and ISNAN()

[Bill Northcott]

On 06/01/2005, at 3:31 PM, John W. Eaton wrote:
> What I finally decided to do for Octave was to use a C language
> autoconf test for isnan, then provide a function declared "extern C"
> that is a wrapper around the C isnan function (if it exists).  I also
> use this method for other functions that may be easier to call from C
> than directly from C++.
>
Thanks for confirming my suspicions.

As far as I can see that is just what R has done with the R_IsNaN 
function.  I am just asking that it be included in the standalone Rmath 
library.

Bill Northcott