Re: [HACKERS] backend/utils/adt/float.c uses non-existent NAN value

> Seems at some point someone decided not to be machine-independent in
> backend/utils/adt/float.c
> 
> Redhat 5.2 system with gcc 2.8.1 doesn't define NAN unless _GNU_SOURCE is
> defined first. Although include/utils/dt.h *does* check for NAN (and HUGE_VAL)
> before using them, the float.c doesn't.
> 
> What happened?

I don't see NAN used in any file except numberic.c.  I don't see it in
float.c, at least in 6.5.

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