[Beignet] [PATCH] libocl: define NULL to zero

[Zhigang Gong]

LGTM, will push latter, thanks.

On Sun, Feb 15, 2015 at 04:18:15PM +0800, Ruiling Song wrote:
> using (void*)0 could not pass compilation in clang 3.6.
> It will be treated as private address space pointer, if you compare
> a global pointer with NULL, that is a private and global pointer
> comparison, this is not allowed by OpenCL spec. But zero is allowed
> as it is a pointer and integer comparison.
> 
> Detailed discussion, please read:
> http://lists.cs.uiuc.edu/pipermail/cfe-dev/2015-February/041429.html
> 
> Signed-off-by: Ruiling Song <ruiling.song at intel.com>
> ---
>  backend/src/libocl/include/ocl_types.h |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/backend/src/libocl/include/ocl_types.h b/backend/src/libocl/include/ocl_types.h
> index 3b4ce97..487fe68 100644
> --- a/backend/src/libocl/include/ocl_types.h
> +++ b/backend/src/libocl/include/ocl_types.h
> @@ -21,7 +21,7 @@
>  #pragma OPENCL EXTENSION cl_khr_fp64 : enable
>  #include "ocl_defines.h"
>  
> -#define NULL ((void*)0)
> +#define NULL 0
>  
>  /////////////////////////////////////////////////////////////////////////////
>  // OpenCL Common Defines
> -- 
> 1.7.10.4
> 
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