Re: Building with Visual C++ - Mailing list pgsql-patches

From Magnus Hagander
Subject Re: Building with Visual C++
Date
Msg-id 6BCB9D8A16AC4241919521715F4D8BCEA352E5@algol.sollentuna.se
Whole thread Raw
In response to Building with Visual C++  ("Magnus Hagander" <mha@sollentuna.net>)
Responses Re: Building with Visual C++  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-patches
> > *) Change where NaN is generated. Using 0.0/0.0 doesn't
> work in VC++
> > because it detects it as a divide-by-zero at the compile stage.
>
> If they're going to be that anally uncooperative, why don't
> they have the required-by-C99-spec macro for NAN?  Or at
> least some well-defined way to generate a NaN?

They do have one way that's documented on MSDN, which is:
unsigned long nan[2]={0xffffffff, 0x7fffffff};
double g = *( double* )nan;

I thought that was even uglier ;-), but I can change it to use that on
win32 if you prefer it?

//Magnus

pgsql-patches by date:

Previous
From: "Magnus Hagander"
Date:
Subject: Re: Building with Visual C++
Next
From: Tom Lane
Date:
Subject: Re: Building with Visual C++