下文只做记录使用，细节省略，仅作参考

目录结构如下：

Makefile：

include $(TOPDIR)/rules.mk

PKG_NAME:=hello_world
PKG_VERSION:=0.0.1

PKG_BUILD_DEPENDS:=rust/host
PKG_BUILD_PARALLEL:=1

include $(INCLUDE_DIR)/package.mk
include $(TOPDIR)/feeds/packages/lang/rust/rust-package.mk


define Package/hello_world
  SECTION:=LuCI
  CATEGORY:=vLai
  TITLE:=Rust Hello World example
  DEPENDS:=$(RUST_ARCH_DEPENDS)
endef

define Package/hello_world/description
  Hello World rust example for OpenWRT.
endef

$(eval $(call RustBinPackage,hello_world))
$(eval $(call BuildPackage,hello_world))
$(eval $(Build/Compile,hello_world))

1. make menuconfig里面选中vLai目录下的rust-hello-world
2. make V=s package/rust-hello-world/{clean,compile}
3. openwrt会自动开始编译等操作，该过程有点慢，最后生成的文件目录：
   1. openwrt/bin/packages/mipsel_24kc/base：ipk或者apk程序,
   2. openwrt/staging_dir/target-mipsel_24kc_musl/root-ramips/usr/bin：可执行程序
4. 上传到openwrt即可安装或者运行该程序