linux4.15.1编译init/mounts报错

  AR      init/mounts.o
arm-linux-ar: illegal option -- T
Usage: arm-linux-ar [emulation options] [-]{dmpqrstx}[abcfilNoPsSuvV] [member-name] [count] archive-file file...
       arm-linux-ar -M [<mri-script]
 commands:
  d            - delete file(s) from the archive
  m[ab]        - move file(s) in the archive
  p            - print file(s) found in the archive
  q[f]         - quick append file(s) to the archive
  r[ab][f][u]  - replace existing or insert new file(s) into the archive
  t            - display contents of archive
  x[o]         - extract file(s) from the archive
 command specific modifiers:
  [a]          - put file(s) after [member-name]
  [b]          - put file(s) before [member-name] (same as [i])
  [N]          - use instance [count] of name
  [f]          - truncate inserted file names
  [P]          - use full path names when matching
  [o]          - preserve original dates
  [u]          - only replace files that are newer than current archive contents
 generic modifiers:
  [c]          - do not warn if the library had to be created
  [s]          - create an archive index (cf. ranlib)
  [S]          - do not build a symbol table
  [v]          - be verbose
  [V]          - display the version number
  @<file>      - read options from <file>
 emulation options: 
  No emulation specific options
arm-linux-ar: supported targets: elf32-littlearm elf32-bigarm elf32-little elf32-big srec symbolsrec tekhex binary ihex
scripts/Makefile.build:558: recipe for target 'init/mounts.o' failed
make[1]: *** [init/mounts.o] Error 1
Makefile:1018: recipe for target 'init' failed
make: *** [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：http://www.arm9.net/download.asp

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++6
sudo 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 built
arch/arm/boot/Makefile:90: recipe for target 'arch/arm/boot/uImage' failed
make[1]: *** [arch/arm/boot/uImage] Error 1
arch/arm/Makefile:337: recipe for target 'uImage' failed
make: *** [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。