linux-kernel - Re: Problems (a bug?) with UINT

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Message-ID: <je7iqiqtqk.fsf@sykes.suse.de>
Date:	Tue, 05 Jun 2007 17:57:39 +0200
From:	Andreas Schwab <schwab@...e.de>
To:	Richard Purdie <richard@...nedhand.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Problems (a bug?) with UINT_MAX from kernel.h

Richard Purdie <richard@...nedhand.com> writes:

> If I try to compile the code fragment below, I see the error:
>
> #define UINT_MAX	(~0U)
> #if (0xffffffffffffffff == UINT_MAX)
>   #error argh
> #endif

The preprocessor computes all expressions with the largest available
range.  It does not know anything about types.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@...e.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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