ccache: Build with ENABLE_DOCUMENTATION=OFF

This adjusts the Makefile to use the new option to turn off the
doc builds. It will not cause any problems except a warning
about unused options if combined with a ccache source missing
the upstream patch.

Since a config setting is required to re-enable the doc build this
is equivalent to unconditionally disabling the docs if the config
setting is not created.

Signed-off-by: David Adair <[email protected]>

tools/ccache/Makefile

@@ -25,6 +25,9 @@ CMAKE_HOST_OPTIONS += \
 	-DCMAKE_SKIP_RPATH=FALSE \
 	-DCMAKE_INSTALL_RPATH="${STAGING_DIR_HOST}/lib" \
 
+ifneq (docs-$(CONFIG_BUILD_DOCUMENTATION),docs-y)
+CMAKE_HOST_OPTIONS += -DENABLE_DOCUMENTATION=OFF
+endif
 
 define Host/Install/ccache
 	$(INSTALL_DIR) $(STAGING_DIR_HOST)/bin/