[OpenWrt-Devel] [PATCH v2] build: improve ccache support

[Michael Jones]

On Fri, Jun 12, 2020 at 1:44 PM Roman Yeryomin <roman at advem.lv> wrote:

> Set CCACHE_DIR to $(TOPDIR)/.ccache and CCACHE_BASEDIR to $(TOPDIR).
> This allows to do clean and dirclean. Cache hit rate for test build
> after dirclean is ~65%.
> If CCACHE is enabled stats are printed out at the end of building process.
> CCACHE_DIR config variable allows to override default, which could be
> useful
> when sharing cache with many builds.
> cacheclean make target allows to clean the cache.
>
> Changes from v1:
> - remove ccache directory using CCACHE_DIR variable
> - remove ccache leftovers from sdk and toolchain make files
> - introduce CONFIG_CCACHE_DIR variable
> - introduce cacheclean make target
>
>

Wonderful, this solves my use case.

A minor nitpick, but you may want to also add a
CONFIG_CCACHE_COMPILER_CHECK as well.

I personally will not change it, as I use the value that you are already
setting, but it's something to consider.
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