I'm trying to use the isinf and isnan functions to check the validity of
some variables in a root macro. Both functions are not known, even though
the ROOTSYS environment variable is correctly set (math.h is explicitly
included in the macro). The TMath class does not contain either function.
How can I tell root to use the right include files?
Thanks 
Joerg
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Joerg Guenther                   Email: guenther@ikf.uni-frankfurt.de
Institut fuer Kernphysik         office phone: +49-(0)69-798-24254
Universitaet Frankfurt/Main      office fax:   +49-(0)69-798-24212
August-Euler-Str. 06
60486 Frankfurt/Main - FRG