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Date:   Mon, 8 Jul 2019 14:02:23 -0600
From:   Jonathan Corbet <>
To:     Masahiro Yamada <>
Cc:, Sam Ravnborg <>,,,
        Michal Marek <>
Subject: Re: [PATCH v2] kbuild: get rid of misleading $(AS) from documents

On Sun,  7 Jul 2019 01:25:08 +0900
Masahiro Yamada <> wrote:

> The assembler files in the kernel are *.S instead of *.s, so they must
> be preprocessed. Since 'as' of GNU binutils is not able to preprocess,
> we always use $(CC) as an assembler driver.
> $(AS) is almost unused in Kbuild. As of writing, there is just one place
> that directly invokes $(AS).
>   $ git grep -e '$(AS)' -e '${AS}' -e '$AS' -e '$(AS:' -e '${AS:' -- :^Documentation
>   drivers/net/wan/Makefile:  AS68K = $(AS)
> The documentation about *_AFLAGS* sounds like the flags were passed
> to $(AS). This is somewhat misleading.
> Signed-off-by: Masahiro Yamada <>
> Reviewed-by: Nathan Chancellor <>

Would you like me to send this up through the docs tree?



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