build: improve ccache support
Set CCACHE_DIR to $(TOPDIR)/.ccache and CCACHE_BASEDIR to $(TOPDIR). This allows to do clean and dirclean. Cache hit rate for test build after dirclean is ~65%. If CCACHE is enabled stats are printed out at the end of building process. CCACHE_DIR config variable allows to override default, which could be useful when sharing cache with many builds. cacheclean make target allows to clean the cache. Changes from v1: - remove ccache directory using CCACHE_DIR variable - remove ccache leftovers from sdk and toolchain make files - introduce CONFIG_CCACHE_DIR variable - introduce cacheclean make target Signed-off-by: Roman Yeryomin <roman@advem.lv>
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committed by
Petr Štetiar
parent
23de93a521
commit
2ca084ccaa
@@ -15,7 +15,7 @@ override MAKEFLAGS=
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TOOLCHAIN_NAME:=$(VERSION_DIST_SANITIZED)-toolchain-$(if $(CONFIG_VERSION_FILENAMES),$(VERSION_NUMBER)-)$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))_gcc-$(GCCV)$(DIR_SUFFIX).$(HOST_OS)-$(HOST_ARCH)
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TOOLCHAIN_BUILD_DIR:=$(BUILD_DIR)/$(TOOLCHAIN_NAME)
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EXCLUDE_DIRS:=*/ccache \
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EXCLUDE_DIRS:= \
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*/initial \
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*/stamp \
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*/stampfiles \
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