[Buildroot] [PATCH v2 02/17] docs/manual: document usage of BR2_TOOLCHAIN_HAS_SYNC_x

[Yann E. MORIN]

Thomas, All,

On 2016-01-27 23:47 +0100, Thomas Petazzoni spake thusly:
> This commit updates the documentation to detail when and how to use
> the BR2_TOOLCHAIN_HAS_SYNC_x dependency. Note that we chose to not add
> a comment about this dependency, because it is mainly tied to
> architecture capabilities (except in very specific cases, which would
> be way too complicated to explain in a Config.in comment).
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> ---
>  docs/manual/adding-packages-directory.txt | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/docs/manual/adding-packages-directory.txt b/docs/manual/adding-packages-directory.txt
> index b9596a2..5329c10 100644
> --- a/docs/manual/adding-packages-directory.txt
> +++ b/docs/manual/adding-packages-directory.txt
> @@ -279,6 +279,16 @@ use in the comment.
>  ** Dependency symbol: +BR2_ARCH_HAS_ATOMICS+
>  ** Comment string: no comment to be added
>  
> +* Gcc +__sync_*+ built-ins used for atomic operations. They are
> +  available in variants operating on 1 byte, 2 bytes, 4 bytes and 8
> +  bytes. Since different architectures support atomic operations on
> +  different sizes, one dependency symbol is available for each size:
> +** Dependency symbol: +BR2_TOOLCHAIN_HAS_SYNC_1+ for 1 byte,
> +   +BR2_TOOLCHAIN_HAS_SYNC_2+ for two bytes,

Why 'two' in letters here, when you otherwise have 1, 4 and 8 in numerals?

Otherwise:

Acked-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>

Regards,
Yann E. MORIN.

> +   +BR2_TOOLCHAIN_HAS_SYNC_4+ for 4 bytes, +BR2_TOOLCHAIN_HAS_SYNC_8+
> +   for 8 bytes.
> +** Comment string: no comment to be added
> +
>  * Kernel headers
>  ** Dependency symbol: +BR2_TOOLCHAIN_HEADERS_AT_LEAST_X_Y+, (replace
>     +X_Y+ with the proper version, see +toolchain/toolchain-common.in+)
> -- 
> 2.6.4
> 
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