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From: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
To: openembedded-core@lists.openembedded.org
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Cc: wenzong.fan-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org
Subject: Re: [PATCH 1/1] ccache: allow CCACHE_DIR to be overriden
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<wenzong.fan-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org> writes:

> Use weaker assignment for CCACHE_DIR to allow users to override it
> if desired.
>
> -export CCACHE_DIR = "${TMPDIR}/ccache/${MULTIMACH_HOST_SYS}/${PN}"
> +export CCACHE_DIR ?= "${TMPDIR}/ccache/${MULTIMACH_HOST_SYS}/${PN}"

This can be a dangerous change and probably does not have the intended
effect ((project) global ccache dir) due to

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


imo, this class should be removed completely (${PN} local ccache dirs do
not make any sense) and the only useful part

| CCACHE_DISABLE[unexport] = "1"

should be solved by http://patchwork.openembedded.org/patch/32787/



Enrico