-PKG_SOURCE:=binutils-$(PKG_VERSION).tar.bz2
-PKG_MD5SUM:=unknown
-PKG_BUILD_DIR:=$(TOOL_BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
-PKG_CAT:=bzcat
+ifeq ($(PKG_VERSION),2.18)
+ PKG_MD5SUM:=9d22ee4dafa3a194457caf4706f9cf01
+endif
+ifeq ($(PKG_VERSION),2.19.1)
+ PKG_MD5SUM:=09a8c5821a2dfdbb20665bc0bd680791
+endif
+ifeq ($(PKG_VERSION),2.19.1+cs)
+ BIN_VERSION:=20090205
+ PKG_SOURCE:=$(PKG_NAME)-$(BIN_VERSION).tar.bz2
+ PKG_SOURCE_URL:=http://mirror2.openwrt.org/sources
+ PKG_MD5SUM:=040740e8c864dd1a15886753f9c0bc0b
+ HOST_BUILD_DIR:=$(BUILD_DIR_TOOLCHAIN)/binutils-$(BIN_VERSION)
+endif
+ifeq ($(PKG_VERSION),2.20)
+ PKG_MD5SUM:=ee2d3e996e9a2d669808713360fa96f8
+endif
+ifeq ($(PKG_VERSION),2.20.1)
+ PKG_MD5SUM:=9cdfb9d6ec0578c166d3beae5e15c4e5
+endif