help,help!

发布于 2013-07-19 19:17:55 浏览：6188 订阅该版

Because of working at ubuntu 12.04 (64 bit ) now and not familiar with it,
I cannot input chinese,sorry.

I met a problem just now, when I was going on the steps from following "wiki baike" to install rt-thread tool chains :
[http://www.rt-thread.org/dokuwiki/doku.php?id=ubuntu_64_bit%E4%B8%AD%E7%BC%96%E8%AF%91rt-thread](http://www.rt-thread.org/dokuwiki/doku.php?id=ubuntu_64_bit%E4%B8%AD%E7%BC%96%E8%AF%91rt-thread)
when came here,I've tried many times,but failed.
```
sudo apt-get install ia32-libs
```

the shell threw these messages:
```
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 ia32-libs : Depends: ia32-libs-multiarch
E: Unable to correct problems, you have held broken packages.
```

what shall I do?

1    I had changed my update source many times, but still failed.
2    when tried "sudo apt-get install ia32-libs-multiarch",I met another more error message ,such as:
```
      The following packages have unmet dependencies:
      Depends: bluez-alsa:i386 but it is not going to be installed
      Depends: libgettextpo0:i386 but it is not going to be installed
      Depends: gstreamer0.10-plugins-base:i386 but it is not going to be installed
      ...
      ...
```