最近工作闲暇时候做了一个脚本，方便虚拟机里面切换交叉编译器用，因为前段时间工作时候遇到几个项目同时开工的情况，只做了一个虚拟机，里面搭建了5个交叉编译环境，切换起来较为麻烦，故此做了脚本，分享如下
#!/bin/bash
if [ $BK_SUC ];then
echo "ready to set PATHBK=$PATHBK !!!"
export PATH=$PATHBK
else
echo "first backup PATH=$PATH !!!"
export PATHBK=$PATH
fi
export BK_SUC="lebaishi"
if [ $# -ne 1 ] ; then
echo "Please enter 'one' parameter,for example:/usr/local/arm/bin/arm-linux- !!!"
echo "now exit !!!"
#exit 1;
#fi
elif [ "$1" = clean ];then
echo "recover the PATH=$PATHBK !!!"
export PATH=$PATHBK
elif [ ! -d "${1%/*}" ];then
echo "Please enter a valid directory,for example:/usr/local/arm/bin/arm-linux- !!!"
else
echo "now set the PATH=$PATH:${1%/*}"
echo "now set the CROSS_COMPILE=${1##*/}"
export PATH=$PATH:${1%/*}
export ARCH=arm
export CROSS_COMPILE=${1##*/}
fi
用法较为简单，source +脚本名+全路径和前缀，举例：source set-arm-linux.sh /usr/local/arm/gcc-linaro-arm-4.7-ti/bin/arm-linux-gnueabihf-
会先把PATH还原，然后提炼到bin的路径追加给PATH，然后把后面的编译器前缀赋值给CROSS_COMPILE，ARCH一直都是arm，如果有用其他平台的可以手动改下