[Buildroot] [RFC 5/8] ccache: add custom help entries

[Thomas Petazzoni]

The host-ccache package has some custom targets to get statistics
about ccache or change ccache options. This commit adds a
HOST_CCACHE_HELP_HOOKS to ensure such targets are documented in 'make
host-ccache-help'.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
 package/ccache/ccache.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/package/ccache/ccache.mk b/package/ccache/ccache.mk
index 270ea4b..5f86125 100644
--- a/package/ccache/ccache.mk
+++ b/package/ccache/ccache.mk
@@ -58,6 +58,13 @@ endef
 HOST_CCACHE_POST_INSTALL_HOOKS += HOST_CCACHE_DO_INITIAL_SETUP
 endif
 
+define HOST_CCACHE_PACKAGE_HELP
+	@$(call pkg-print-help-opt,ccache-stats,"Show ccache statistics")
+	@$(call pkg-print-help-opt,cache-options,"Update ccache options using CCACHE_OPTIONS variable")
+endef
+
+HOST_CCACHE_HELP_HOOKS += HOST_CCACHE_PACKAGE_HELP
+
 $(eval $(host-autotools-package))
 
 ifeq ($(BR2_CCACHE),y)
-- 
2.1.0