AR      init/mounts.oarm-linux-ar: illegal option -- TUsage: arm-linux-ar [emulation options] [-]{dmpqrstx}[abcfilNoPsSuvV] [member-name] [count] archive-file file...       arm-linux-ar -M [
     
            - read options from 
      
        emulation options:   No emulation specific optionsarm-linux-ar: supported targets: elf32-littlearm elf32-bigarm elf32-little elf32-big srec symbolsrec tekhex binary ihexscripts/Makefile.build:558: recipe for target 'init/mounts.o' failedmake[1]: *** [init/mounts.o] Error 1Makefile:1018: recipe for target 'init' failedmake: *** [init] Error 2
      
     

 这个问题一时不知道怎么查，于是各种百度，但几乎没人遇到这种问题，于是第一反应想到的是工具链的问题，于是换了arm-linux-gcc4.4.3的版本，可以直接去友善之臂的官网下载：

换成了4.4.3的工具链却报下面的问题：

error while loading shared libraries: libstdc++.so.6: cannot open shared object file: No such file or directory

于是安装库：

sudo apt-get install lib32stdc++6sudo apt-get install lib32z1

终于编过了，看到希望了，但最后还是报了一个错误：

"mkimage" command not found - U-Boot images will not be builtarch/arm/boot/Makefile:90: recipe for target 'arch/arm/boot/uImage' failedmake[1]: *** [arch/arm/boot/uImage] Error 1arch/arm/Makefile:337: recipe for target 'uImage' failedmake: *** [uImage] Error 2

其实这个问题很好解决，mkimage这个工具在编译uboot的时候就会产生，在uboot/tools/目录下，所以只需要将这个目录加到环境变量里面去即可。