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From: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
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Subject: Re: [PATCH 1/1] ccache.bbclass: Allow user to override CCACHE_DIR.
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Paul Sokolovsky <pmiscml-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
writes:

> For example, some users may want to use single cache directory (instead
> of per-package) with known max size limit, to better control disk usage.

You change conflicts with

| do_clean[cleandirs] += "${CCACHE_DIR}"


To use ccache, it is the best to avoid this class completely and to
remove

| export CCACHE_DISABLE ??= "${@[0,1][d.getVar('CCACHE', True) == '']}"

from bitbake.conf.


Enrico