[Patch, AArch64] Add GAS target-specific command line option -mabi=<abi_name>

[Yufeng Zhang]

Hi Nick,

Thanks for the prompt review.

On 07/19/13 11:57, nick clifton wrote:
> I see a couple of small problems with this patch:
>
>     * You should issue an error message if the old (now deprecated)
> -milp32 or -mlp64 command line options are used.

I agree that in general the deprecation shall communicate more friendly 
error message to the existing usage, but in this particular case, I 
think it is less required to do so as it is very unlikely -milp32 and 
-mlp64 have been used by the community so far.  The options were added 
only a few weeks ago and the related patch for the gcc driver has not 
been committed to the upstream yet.  So I think it shall be fine to 
simply remove the support for the two options.  What do you think?

>
>     * You are testing membership of an enum using a binary AND operator:
>
> #define ilp32_p		(aarch64_abi&  AARCH64_ABI_ILP32)
>
>     Ie, I think that this should be:
>
> #define ilp32_p		(aarch64_abi == AARCH64_ABI_ILP32)

I'll change to use '=='.


Thanks,
Yufeng