datapath: Use ccflags-y instead of deprecated EXTRA_CFLAGS

This allows users to pass in additional compiler flags through the
environment variable EXTRA_CFLAGS, e.g.

   make EXTRA_CFLAGS=-Wno-error=foo V=1

Reported-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Thomas Graf <tgraf@noironetworks.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>

diff --git a/datapath/linux/Kbuild.in b/datapath/linux/Kbuild.in
index 6f6f65f..cb98c11 100644 (file)
--- a/datapath/linux/Kbuild.in
+++ b/datapath/linux/Kbuild.in
@@ -7,11 +7,11 @@ export VERSION = @VERSION@
 include $(srcdir)/../Modules.mk
 include $(srcdir)/Modules.mk
 
-EXTRA_CFLAGS := -DVERSION=\"$(VERSION)\"
-EXTRA_CFLAGS += -I$(srcdir)/..
-EXTRA_CFLAGS += -I$(builddir)/..
-EXTRA_CFLAGS += -g
-EXTRA_CFLAGS += -include $(builddir)/kcompat.h
+ccflags-y := -DVERSION=\"$(VERSION)\"
+ccflags-y += -I$(srcdir)/..
+ccflags-y += -I$(builddir)/..
+ccflags-y += -g
+ccflags-y += -include $(builddir)/kcompat.h
 
 # These include directories have to go before -I$(KSRC)/include.
 # NOSTDINC_FLAGS just happens to be a variable that goes in the