Questions[32-bit](ubuntu)

I don't know why I can't install ia32-libs. It claims for a dependency that cannot be found on repos.

junior@mediacenter:~$ sudo apt-get install ia32-libs
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.


junior@mediacenter:~$ sudo apt-get install ia32-libs-multiarch
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-multiarch:i386 : Depends: gstreamer0.10-plugins-good:i386 but it is not going to be installed
                            Depends: gtk2-engines:i386 but it is not going to be installed
                            Depends: gtk2-engines-murrine:i386 but it is not going to be installed
                            Depends: gtk2-engines-pixbuf:i386 but it is not going to be installed
                            Depends: gtk2-engines-oxygen:i386 but it is not going to be installed
                            Depends: ibus-gtk:i386 but it is not going to be installed
                            Depends: libcanberra-gtk-module:i386 but it is not going to be installed
                            Depends: libcurl3:i386 but it is not going to be installed
                            Depends: libgail-common:i386 but it is not going to be installed
                            Depends: libglapi-mesa:i386 but it is not going to be installed
                            Depends: libglu1-mesa:i386 but it is not going to be installed
                            Depends: libgtk2.0-0:i386 but it is not going to be installed
                            Depends: libqt4-opengl:i386 but it is not going to be installed
                            Depends: librsvg2-common:i386 but it is not going to be installed
                            Recommends: libgl1-mesa-glx:i386 but it is not going to be installed
                            Recommends: libgl1-mesa-dri:i386 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Running ubuntu Precise:

junior@mediacenter:~$ uname -a
Linux mediacenter 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Synaptic fix broken package does nothing. Any tips?? Thanks I need this package to install other apps like teamviewer7.

My sources.list is here.

Over the time I installed many i386 packages, which I no longer need. How can I clean up the system and stay only with the amd64 packages?

I'm trying to compile a c program as a 32 bit binary instead of 64 bit. I started by just adding -m32 and got some errors. Googling around a little I came across a note to install ia32-libs. Running apt-get install ia32-libs resulted in a notification taht it was already installed and at the newest version.

There is a chain of libraries each one including the next until it fails:

/usr/include/features.h:323:26: fatal error: bits/predefs.h: No such file or directory

It seems to be including 32 bit versions of the other includes /usr/include/c++/4.6/x86_64-linux-gnu/32/bits/ ...

What am I missing?

Is there an easy way to upgrade the system to x64 from x86 without losing settings and having to repartition etc?

As per title, I wish to know if I can, after a successful 32bit setup and consequent software installations, update to a 64bit version.

I know how to partition (actually one of the solutions is to set /, /etc, /home, /var/www, and /opt as separate partitions) and I know that a clean install is way better than a dirty one, yet I would like to know if/how it's possible to do that.