+# replace dot with space, and if 3rd word exists we deal with stable dpdk rel
+ifeq ($(word 3,$(subst ., ,$(DPDK_VERSION))),)
+DPDK_SOURCE := $(B)/dpdk-$(DPDK_VERSION)
+else
+DPDK_SOURCE := $(B)/dpdk-stable-$(DPDK_VERSION)
+endif
+
+NASM_BASE_URL := http://www.nasm.us/pub/nasm/releasebuilds
+NASM_VER := 2.13.01
+NASM_TARBALL := nasm-$(NASM_VER).tar.xz
+NASM_TAR_URL := $(NASM_BASE_URL)/$(NASM_VER)/$(NASM_TARBALL)
+NASM_SOURCE := $(B)/nasm-$(NASM_VER)