mk: allow application to override clean

In some cases application may want to have additional rules
for clean. This can be handled by allowing the double colon
form of rule.

 https://www.gnu.org/software/make/manual/html_node/Double_002dColon.html

Single colon and double colon rules for same target causes
an error.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>

diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index 40afb2c..9c8b06a 100644 (file)
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -325,7 +325,7 @@ $(RTE_OUTPUT)/app/$(APP).map: $(APP)
 # Clean all generated files
 #
 .PHONY: clean
-clean: _postclean
+clean:: _postclean
        $(Q)rm -f $(_BUILD_TARGETS) $(_INSTALL_TARGETS) $(_CLEAN_TARGETS)
 
 .PHONY: doclean