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<title>linux/poky.git/meta/conf/ccache.conf, branch styhead</title>
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<updated>2023-11-05T11:28:30+00:00</updated>
<entry>
<title>ccache.conf: Remove obsolete configuration option</title>
<updated>2023-11-05T11:28:30+00:00</updated>
<author>
<name>Niko Mauno</name>
<email>niko.mauno@vaisala.com</email>
</author>
<published>2023-10-31T14:13:26+00:00</published>
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<id>urn:sha1:075e3271076a22f91331a67bc7418cec3a21e9c7</id>
<content type='text'>
Since ccache version 4.0, according to
https://github.com/ccache/ccache/blob/master/doc/NEWS.adoc#ccache-40

 * An appropriate cache directory level structure is now chosen automatically. The cache_dir_levels (CCACHE_NLEVELS) configuration option has therefore been removed.

Therefore remove the option which has not been supported by ccache
recipe version since Yocto Hardknott.

(From OE-Core rev: 1d7c1b71e2639b8d069403920368292bd214347d)

Signed-off-by: Niko Mauno &lt;niko.mauno@vaisala.com&gt;
Signed-off-by: Alexandre Belloni &lt;alexandre.belloni@bootlin.com&gt;
Signed-off-by: Richard Purdie &lt;richard.purdie@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>ccache.bbclass: Set CCACHE_CONFIGPATH to fix race issues</title>
<updated>2019-01-14T11:35:55+00:00</updated>
<author>
<name>Robert Yang</name>
<email>liezhi.yang@windriver.com</email>
</author>
<published>2018-12-17T06:30:27+00:00</published>
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<id>urn:sha1:e96d0200ca3226a3127934ed29c202797d88e4c2</id>
<content type='text'>
Fixed race issues when parallel build:
ccache: error: /path/to/ccache/i586-poky-linux/mmc-utils/ccache.conf: No such file or directory
ccache: error: /path/to/ccache/i586-poky-linux/mmc-utils/ccache.conf: No such file or directory

This is because we set CCACHE_DIR for earch recipe, and ccache will create a
ccache.conf for each CCACHE_DIR when CCACHE_CONFIGPATH is not set, but there
might be a race issue in parallel build:

ccache gcc file1.c
ccache gcc file2.c

If the two ccache processes use fopen(path, "w") to create ccache.conf at the
same time, the error would happen. Set CCACHE_CONFIGPATH to
meta/conf/ccache.conf can fix the problem, and we can add other configs to the
file when needed.

And also set cache_dir_levels to 1 (default is 2) since each recipe has a cache
dir, thus we don't have too many files in one dir.

(From OE-Core rev: 2abbc4d0cd571e82ed6188d3b2d84b4cd6be25e8)

Signed-off-by: Robert Yang &lt;liezhi.yang@windriver.com&gt;
Signed-off-by: Richard Purdie &lt;richard.purdie@linuxfoundation.org&gt;
</content>
</entry>
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