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Re: fails to compile with undefined symbol (FP_PLUS_INF)

From: Seneca Cunningham <scunning(at)ca(dot)afilias(dot)info>
To: Riccardo Mottola <multix(at)gmail(dot)com>
Cc: pgsql-ports(at)postgresql(dot)org
Subject: Re: fails to compile with undefined symbol (FP_PLUS_INF)
Date: 2006-03-16 17:16:23
Message-ID: 44199D67.60408@ca.afilias.info (view raw or flat)
Thread:
Lists: pgsql-ports
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

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