[FFmpeg-devel] [PATCH 1/4] configure: aarch64: Support assembling the dotprod and i8mm arch extensions

Martin Storsjö martin at martin.st
Thu Jun 1 14:04:17 EEST 2023

On Sun, 28 May 2023, Martin Storsjö wrote:

> The documentation for .arch_extension hints at it being possible to disable 
> support for extensions with it too, but that doesn't seem to be the case in 
> practice. If it was, we could add macros to only enable specifically the 
> extensions we want around those functions that should use them and nothing 
> more. But I guess if that's not actually supported we can't do that.

Actually, yes, this does work, it just uses a different syntax than I 
expected. To disable the extension <ext>, one can write the directive 
".arch_extension no<ext>".

Is the updated, less complex version of the configure patch more 

// Martin

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