cmath, math.h, and isnan

cmath, math.h, and isnan

[Wesley Smith]

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?

thanks,
wes

Re: 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