[PATCH] [AArch64] Implement Clang CLI interface proposal about "-march".
kevinqindev at gmail.com
Mon Jul 7 19:14:47 PDT 2014
2014-07-03 16:26 GMT+08:00 Kevin Qin <kevinqindev at gmail.com>:
> ping... Is any comment on this patch?
> 2014-07-01 18:29 GMT+08:00 Renato Golin <renato.golin at linaro.org>:
> On 1 July 2014 10:55, Kevin Qin <kevinqindev at gmail.com> wrote:
>> > It's deprecated. Any use of "-mfpu" on AArch64 target will provide an
>> > warning "argument unused during compilation" and won't block compiling
>> > process. So most build systems can still work well except receiving a
>> lot of
>> > warnings.
>> It might not block the compilation process, but it might break the
>> linking process (build attributes, libraries), or change code
>> generation, with regards to vectorization and optimizations. I agree
>> this is not critical, but it's the kind of bug that is hard to find
>> (as opposed to a compilation error), and the kind of warnings that
>> people tend not to look at.
>> I have no more arguments against the removal, and I don't feel too bad
>> about it, but was just raising the issue. If people think it's for the
>> best, I'll go with it.
>> > Gcc can accept "-mcpu" with modifiers.
>> Hum... ok, I had no idea, and from their docs, it's not clear also. In
>> that case, fine by me.
>> Thanks for threading this awkward minefield! I think Tim and others
>> more involved in the AArch64 port should have a final look, but from
>> what you discussed, I have no more objections.
> Best Regards,
> Kevin Qin
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