Re: fails to compile with undefined symbol (FP_PLUS_INF)

[Seneca Cunningham <scunning(at)ca(dot)afilias(dot)info>]

Riccardo Mottola wrote:
> Hello,
>
> > Is there a float.h in your gcc install directory?  Is it #included
> > instead of /usr/include/float.h by gcc?  My faithful grep tool says:
> >
> > -bash-2.05b$ grep FP_MINUS_INF /usr/include/*
> > /usr/include/float.h:#define FP_MINUS_INF      5
> > /usr/include/math.h:#define FP_MINUS_INF      5
> >
> > The float.h that's part of gcc doesn't contain the defines.
>
> yes, exactly.  lib/gcc/powerpc-ibm-aix4.2.1.0/3.4.5/include/float.h
>
> and indeed, it has not those defines.
> As far as I know, the gcc includes have always precedence. Maybe you
> should run a configure check?
> Do you know a workaround?

Something that may work would be to take the block of defines output by:

grep -p FP_MINUS_INF /usr/include/*

and add it to the math.h in the gcc directory.  I don't have a 4.2 box 
here so I can't test this, but the math.h in my gcc directory does 
contain the defines.  That math.h should be similar to the math.h in 
/usr/include.

--
Seneca Cunningham
scunning(at)ca(dot)afilias(dot)info