[OE-core] [PATCH] ccache: Separate out into its own class

[Jason Wessel]

On 05/29/2012 07:29 AM, Richard Purdie wrote:
> Currently, ccache is used if it is present. When building from scratch it gives
> no performance improvement and creates a ton of empty directories even when its
> not in use.
>
> This change moves ccache support to a bbclass file which the user can choose to
> enable. This should make builds more determinstic and make it easier/clearer
> to the end user when its being used and when it is not.

Are the sstate sums the same with and without the use of the new bbclass ccache?

It is not clear to me that this is or is not the case based on this single commit header.

Jason.