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

From: Bill Northcott <>
Date: Thu 06 Jan 2005 - 08:29:18 EST

On 06/01/2005, at 6:53 AM, Thomas Lumley wrote:
> I believe (with a little Googling) the suggested C++ approach is to
> use std::isnan if <cmath> is included.
I tried that too, but without any success. I even tried __gnu_cxx::isnan.

It was suggested by one of the gcc people, but I could find no documentation about it. The ISO C++ docs do not include isnan as a symbol provided by cmath within the std namespace. I looked at the gcc source code and could see no reason why it should work.

Bill Northcott mailing list Received on Thu Jan 06 08:08:41 2005

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