The problem is not with the flags, but that OS X comes with an outdated GNU 
Assembler. I am wondering if there are any workarounds.

On Thursday, April 9, 2015 at 7:02:10 PM UTC+8, Mouse wrote:
>
> What you need is adding the AES-NI and PCMUL flags to CXXFLAGS. I think I 
> posted my GNUmakefile here several times. 
>
> Sent from my iPad
>
> On Apr 9, 2015, at 04:21, Siyuan Ren <[email protected] <javascript:>> 
> wrote:
>
> I find a thread several years ago detailing why ASM is disabled on OS X. I 
> just wonder if this has changed.
>
> I did a little test and CommonCrypto (the crypto API provided by OS X 
> itself) is consistently 50% faster than Crypto++, probably due to the use 
> of AES-NI. Performance is very important to me because I need to 
> encrypt/decrypt very large files on the fly.
>
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