[CRIU] [PATCH] use #pragma once instead of #define guards

[Andrew Vagin]

On Mon, Dec 23, 2013 at 01:39:07PM +0400, Pavel Emelyanov wrote:
> On 12/21/2013 07:20 AM, Shawn Landden wrote:
> 
> The signed-off-by line lost.
> Since which version does gcc supports this pragma?

File handling in the preprocessor has been rewritten. GCC no longer gets
confused by symlinks and hardlinks, and now has a correct implementation
of #import and #pragma once. These two directives have therefore been
un-deprecated.

http://gcc.gnu.org/gcc-3.4/changes.html

> And we also have headers at arch/*/include/asm/ directories :)
> 
> Thanks,
> Pavel
> 
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