Debian 7: Add repository for gcc-4.8 and g++-4.8

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http://unix.stackexchange.com – I want to be able to sudo apt-add-repository with a ppa for gcc-4.8 and g++-4.8. I was able to do this on Ubuntu using (after adding the ppa) sudo apt-get install g++-4.8. So far I have been able to install (apt-get) the python-software-properties, which allows me to use the apt-add-repository command/script. What are the gcc, g++ ppa's which I should be using for Debian 7? Thanks in advance. (HowTos)