linux-kernel - Re: [PATCH] [kernel/ subdirectory] constifications

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Date:	Mon, 09 Oct 2006 20:22:34 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Helge Deller <deller@....de>
Cc:	Linus Torvalds <torvalds@...l.org>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [kernel/ subdirectory] constifications

On Mon, 2006-10-09 at 20:16 +0200, Helge Deller wrote:
> On Monday 09 October 2006 08:59, Arjan van de Ven wrote:
> > On Sun, 2006-10-08 at 21:21 +0200, Helge Deller wrote:
> > > - completely constify string arrays,  thus move them to the rodata section
> > 
> > note that gcc 4.1 and later will do this automatically for static things
> > at least...
> 
> Are you sure ?
> 
> At least with gcc-4.1.0 from SUSE 10.1 the strings array _pointers_ are not moved into the rodata section without the second "const":
> const static char * const x[] = { "value1", "value2" };
> 

hmm I could have sworn GCC does this automatic nowadays as long as it
can prove you're not writing to the thing (eg static and not passing the
pointer to some external function).....

(even if gcc does this perfect I'm still in favor of the explicit const,
just to catch stupid code with a warning)

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com

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