使用OpenWrt SDK开发ipk(helloworld.ipk)

说明

几年前想编译一个helloworld.ipk,由于以下原因当年尝试失败了

当年太水(现在还是很湿)
学校网络太操蛋(ubuntu下借脚本连闪讯,时断时序,编译个固件要纯手工6+H,想想都是泪)
太jb费时间(一个helloworld整了几天没整出来,灰心了)

---

1. 下载openwrt trunk代码

svn co svn://svn.openwrt.org/openwrt/trunk/

2. 编译openwrt brcm63xx固件,注意勾上sdk

make menuconfig
make V=99

3. 使用brcm63xx平台sdk编译ipk

解压 sdk bin/OpenWrt-SDK-xxx.tar.bz2

tar xvf OpenWrt-SDK-xxx.tar.bz2

在package路径下建立helloworld工程

package
├── helloworld
│   ├── Makefile
│   └── src
│       ├── helloworld.c
│       └── Makefile
└── Makefile

建立staging_dir链接(交叉编译工具)

cd sdk
ln -s ../trunk/staging_dir ./staging_dir

编译

make distclean
make menuconfig
make V=99

bin
├── brcm63xx
│   └── packages
│       ├── helloworld_1.0-1_brcm63xx.ipk
│       ├── Packages
│       └── Packages.gz
└── packages

---

代码

package/helloworld/Makefile

include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/package.mk

PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)

PKG_NAME:=helloworld
# Version: 1.0-1
PKG_VERSION:=1.0
PKG_RELEASE:=1
PKG_MAINTAINER:=JPH 
# PKG_SOURCE_URL:=

define Package/helloworld
    SECTION:=utils
    CATEGORY:=Utilities
    DEFAULT:=y
    TITLE:=Helloworld -- prints a snarky message
    # DEPENDS:=+libmath
endef

define Build/Prepare
    @echo "############## Build/Prepare"
    $(Build/Prepare/Default)
    $(CP) ./src/* $(PKG_BUILD_DIR)  
endef

define Package/helloworld/install
    @echo "############## Package/helloworld/install"
    $(INSTALL_DIR) $(1)/usr/bin
    $(INSTALL_BIN) $(PKG_BUILD_DIR)/helloworld $(1)/usr/bin
endef

$(eval $(call BuildPackage,helloworld))

package/helloworld/src/helloworld.c

#include 

int main(int argc, const char *argv[])
{
    printf("hello world! \n");

    return 0;
}

package/helloworld/src/Makefile

helloworld: helloworld.o
    $(CC) helloworld.o -o helloworld

helloworld.o: helloworld.c
    $(CC) -c helloworld.c

clean:
    rm *.o helloworld