The ccache plugin is a compiler cache plugin. It is disabled by default and has an upper limit of 4GB of ccache data.

Note: this plugin was enabled by default in mock-1.2.14 and older.

Configuration

The ccache plugin is enabled by default and has the following values built-in:

config_opts['plugin_conf']['ccache_enable'] = True
config_opts['plugin_conf']['ccache_opts']['max_cache_size'] = '4G'
config_opts['plugin_conf']['ccache_opts']['compress'] = None
config_opts['plugin_conf']['ccache_opts']['dir'] = "%(cache_topdir)s/%(root)s/ccache/u%(chrootuid)s/"
config_opts['plugin_conf']['ccache_opts']['hashdir'] = True
config_opts['plugin_conf']['ccache_opts']['debug'] = False
config_opts['plugin_conf']['ccache_opts']['show_stats'] = False

To turn on ccache compression, use the following in a config file:

config_opts['plugin_conf']['ccache_opts']['compress'] = 'on'

The value specified is not important, this just triggers the setting of the CCACHE_COMPRESS environment variable, which is what the ccache program uses to determine if compression of cache elements is desired.

Setting hashdir to False excludes the build working directory from the hash used to distinguish two compilations when generating debuginfo. While this allows the compiler cache to be shared across different package NEVRs, it might cause the debuginfo to be incorrect. The option can be used for issue bisecting if running the debugger is unnecessary. ([issue 1395][]https://github.com/rpm-software-management/mock/issues/1395) See ccache documentation. This option is available since Mock 5.7.

Setting debug to True creates per-object debug files that are helpful when debugging unexpected cache misses. See ccache documentation. This option is available since Mock 5.7.

If show_stats is set to True, Mock calls ccache --zero-stats first (before doing the build), and then calls ccache --show-stats. This option is available since Mock v5.7+.