Re: [PATCH] [6 and trunk] Fix bootstrap with older host compilers

[Richard Biener <richard.guenther@gmail.com>]

On Fri, Apr 15, 2016 at 8:31 PM, Segher Boessenkool
<segher@kernel.crashing.org> wrote:
> We didn't have __builtin_swap16 on all targets before GCC 4.8; hsa-brig
> tries to use it if the host GCC is 4.6 or up though, breaking bootstrap.
> This trivial patch fixes it.
>
> Noticed on gcc22.
>
> Is this okay for trunk and gcc-6?

Ok.

Thanks,
Richard.

>
> Segher
>
>
> 2016-04-15  Segher Boessenkool  <segher@kernel.crashing.org>
>
>         * has-brig.c (lendian16): Don't try to use __builtin_bswap16
>         unless compiling with at least GCC-4.8.
>
> ---
>  gcc/hsa-brig.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/gcc/hsa-brig.c b/gcc/hsa-brig.c
> index a943e37..9c74b9a 100644
> --- a/gcc/hsa-brig.c
> +++ b/gcc/hsa-brig.c
> @@ -51,7 +51,7 @@ along with GCC; see the file COPYING3.  If not see
>  static uint16_t
>  lendian16 (uint16_t val)
>  {
> -#if GCC_VERSION >= 4006
> +#if GCC_VERSION >= 4008
>  #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
>    return val;
>  #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
> --
> 1.9.3
>