linux安装gcc-arm-none-eabi

1.下载地址

https://launchpad.net/gcc-arm-embedded/+download

2.安装方法

     a.安装路径

               cd usr/bin

     b. 解压     

                tar jxvf xxxxxxxxxxxxxxx.tar.bz2 -C /usr/bin

     c.修改环境变量

                vim /etc/profile

                添加export PATH=/usr/bin/gcc-arm-none-eabi-4_9-2015q1/bin:$PATH

      d.使新的环境变量生效

                source /etc/profile

                 reboot（选择）

       e.检查路径添加是否成功

                 echo $PATH

3.多个gcc之间的切换

1.查看当前的gcc

$ ls /usr/bin/gcc* -l  #查看当前所有的gcc

 lrwxrwxrwx 1 root root        7 Aug 23  2015 /usr/bin/gcc -> gcc-4.6
 -rwxr-xr-x 1 root root   306200 Apr 16  2012 /usr/bin/gcc-4.6
 -rwxr--r-- 1 root root 74404999 Aug 23  2015 /usr/bin/gcc-arm-none-eabi-4_9-2015q1-20150306-linux.tar.bz2

 /usr/bin/gcc-arm-none-eabi-4_9-2015q1:
 total 16
 drwxr-xr-x 6 root root 4096 Mar  6  2015 arm-none-eabi
 drwxr-xr-x 2 root root 4096 Mar  6  2015 bin
 drwxr-xr-x 3 root root 4096 Mar  6  2015 lib
 drwxr-xr-x 4 root root 4096 Mar  6  2015 share

 /usr/bin/gcc-linaro-arm-linux-gnueabihf-4.7-2013.03-20130313_linux:
 total 20
 drwxr-xr-x 7 1001 1001 4096 Mar 14  2013 arm-linux-gnueabihf
 drwxr-xr-x 2 1001 1001 4096 Mar 14  2013 bin
 drwxr-xr-x 3 1001 1001 4096 Mar 14  2013 lib
 drwxr-xr-x 3 1001 1001 4096 Mar 14  2013 libexec
 drwxr-xr-x 7 1001 1001 4096 Mar 14  2013 share

2.切换gcc

$cd /usr/bin
$gcc --version  # 1.查看当前的gcc
$rm gcc
$ln -s /usr/bin/gcc-arm-none-eabi-4_9-2015q1/bin/arm-none-eabi-gcc gcc   #arm-none-eabi-gcc为当前要使用的GCC
$gcc --version  # 2.查看当前的gcc 与1不同