I might be the last person who 'gets' it, but I always presumed that since package versions in backports would be newer they'd automatically be installed. But apparently that's not the case.
So, enable wheezy-backports, e.g. put this in your /etc/apt/sources.list
Then install libreoffice 4:
That's it.
Post-script:
To see what your policies are:
To see what's available in backports, do
So, enable wheezy-backports, e.g. put this in your /etc/apt/sources.list
deb http://ftp.iinet.net.au/debian/debian/ wheezy-backports main contrib non-free
Then install libreoffice 4:
sudo apt-get install libreoffice -t=wheezy-backports
That's it.
Post-script:
To see what your policies are:
apt-cache policy libreofficeand as it turns out the backports repo only has a score of 100, and looking at man apt_preferences:
libreoffice:
Installed: 1:4.0.3-2~bpo70+1
Candidate: 1:4.0.3-2~bpo70+1
Version table:
*** 1:4.0.3-2~bpo70+1 0
100 http://ftp.iinet.net.au/debian/debian/ wheezy-backports/main amd64 Packages
100 /var/lib/dpkg/status
1:3.5.4+dfsg2-0+deb7u2 0
500 http://ftp.iinet.net.au/debian/debian/ wheezy/main amd64 Packages
If the target release has been specified then APT uses the following algorithm to set the priorities of the versions of a package. Assign:
priority 1
to the versions coming from archives which in their Release files are marked as "NotAutomatic: yes" but not as "ButAutomaticUpgrades: yes" like the
Debian experimental archive.
priority 100
to the version that is already installed (if any) and to the versions coming from archives which in their Release files are marked as "NotAutomatic:
yes" and "ButAutomaticUpgrades: yes" like the Debian backports archive since squeeze-backports.
priority 500
to the versions that are not installed and do not belong to the target release.
priority 990
to the versions that are not installed and belong to the target release.
To see what's available in backports, do
aptitude search ~Awheezy-backports
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