$(PATCH) $(PKG_BUILD_DIR) $(TOPDIR)/target/linux/generic-$(KERNEL)/patches
$(SED) 's/@expr length/@-expr length/' $(PKG_BUILD_DIR)/Makefile
ln -sf $(PKG_BUILD_DIR) $(LINUX_HEADERS_DIR)
endef
define Build/Configure
$(PATCH) $(PKG_BUILD_DIR) $(TOPDIR)/target/linux/generic-$(KERNEL)/patches
$(SED) 's/@expr length/@-expr length/' $(PKG_BUILD_DIR)/Makefile
ln -sf $(PKG_BUILD_DIR) $(LINUX_HEADERS_DIR)
endef
define Build/Configure