-mdynamic-no-pic is not supported for x86_64 (it is silently ignored), which is why you don't get an error. Performance gains are probably illusory, and you would get it without -mdynamic-no-pic.
Under i386 you are attempting to link -mdynamic-no-pic code into a shared library, which is not supported. Don't do that.
Shantonu Sen
email@hidden
Sent from my Mac Pro
On Dec 11, 2009, at 9:29 AM, Joel Reymont wrote:
> The reason I want to use -mdynamic-no-pic is that it seems to give Firefox a large performance boost on Snow Leopard when compiled mostly statically and for x86-64.
>
> Thanks, Joel
>
> ---
> Mac hacker with a performance bent
> http://www.linkedin.com/in/joelreymont
>
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