交叉编译环境搭建教程

1. 在/usr/local/下建立交叉编译器的安装目录arm
   sudo mkdir /usr/local/arm

2. 将下载的交叉编译器包解压到/usr/local/arm目录下
   sudo tar jxvf cross-4.2.2-eabi.tar.bz2 -C /usr/local/arm/

3. 解压成功后，修改PATH环境变量
   sudo vim /etc/profile

export PATH=$PATH:/usr/local/arm/4.2.2-eabi/usr/bin

Special for me:
sudo vim /etc/profile
export PATH=$PATH:/usr/local/arm/current_compiler/bin
sudo ln -sb 编译器文件夹 /usr/local/arm/current_compiler/

4. 更新一下配置文件/etc/profile
   source /etc/profile

创建软链接到指定的编译器

 build.sh
 #/bin/bash
 if [ $# != 1 ] ; then
     echo "USAGE: $0 cross_compiler_dir_name"
     exit 1;
 fi
 cross_compiler=$1

 rm ./current_compiler

 ln -s ${cross_compiler} current_compiler

 echo link current_compiler to ${cross_compiler}