d1bca7c49c
usage: # set cache limit size make CCACHE_OPTIONS="--max-size=5G" ccache-options # zero statistics counters make CCACHE_OPTIONS="--zero-stats" ccache-options [Peter: drop the redundant ifeq] Signed-off-by: Tzu-Jung Lee <tjlee@ambarella.com> Acked-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
// -*- mode:doc; -*-
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// vim: set syntax=asciidoc:
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[[ccache]]
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Using +ccache+ in Buildroot
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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http://ccache.samba.org[ccache] is a compiler cache. It stores the
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object files resulting from each compilation process, and is able to
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skip future compilation of the same source file (with same compiler
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and same arguments) by using the pre-existing object files. When doing
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almost identical builds from scratch a number of times, it can nicely
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speed up the build process.
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+ccache+ support is integrated in Buildroot. You just have to enable
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+Enable compiler cache+ in +Build options+. This will automatically
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build +ccache+ and use it for every host and target compilation.
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The cache is located in +$HOME/.buildroot-ccache+. It is stored
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outside of Buildroot output directory so that it can be shared by
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separate Buildroot builds. If you want to get rid of the cache, simply
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remove this directory.
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You can get statistics on the cache (its size, number of hits,
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misses, etc.) by running +make ccache-stats+.
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The make target +ccache-options+ and the +CCACHE_OPTIONS+ variable
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provide more generic access to the ccache. For example
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-----------------
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# set cache limit size
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make CCACHE_OPTIONS="--max-size=5G" ccache-options
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# zero statistics counters
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make CCACHE_OPTIONS="--zero-stats" ccache-options
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-----------------
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