On Thu, 2005-01-06 at 08:29 +1100, Bill Northcott wrote: > 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.
I think the workaround is supposed to look like this: #define _GLIBCPP_USE_C99 1 #include <cmath> #undef _GLIBCPP_USE_C99 #include <iostream> using __gnu_cxx::isnan; I don't know whether this solves the problem on MacOs X but it is valid on Linux. But do you really want to write code that is specific to gcc? I don't. Martyn ______________________________________________ R-devel@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-devel