cmath, math.h, and isnan

[Bob Rossi]

On Mon, May 23, 2005 at 08:32:13AM -0700, Wesley Smith wrote:
> Hi,
> 
> I'm trying to compile some image processing software that uses isnan. 
> I'm using gcc 3.3 on os x, so (as was pointed out earlier) the c99
> extensions aren't in c++ yet.  Thus, when I include on cmath I get a
> 'isnan' undeclared error.  The same goes for when I include both cmath
> and math.h.  When I just include math.h however isnan is defined and I
> can compile.
> 
> In compiling this software, I need to somehow figure out how to use
> both the isnan from math.h and cmath for the other functions defined
> there in the same header file but not have them conflict.  Are there
> any compiler settings of macros that can be used to do this?

At a bare minimum, you could include each header in a separate file, and
then write wrappers for the functions you want to call. This would at
least be a temporary work around.

Bob Rossi