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Friday, June 29, 2012

A question about "add-apt-repository"(gcc 4.7 or bumblebee)

I install ubuntu 12.04 in my notebook and I use c++. I want to use c++11,so I want to upgrade my gcc to gcc4.7. I do like this:



sudo add-apt-repository ppa:ubuntu-toolchain-r/test  
sudo apt-get update
sudo apt-get install gcc-4.7
sudo apt-get install g++-4.7


but when I run "sudo apt-get install gcc-4.7", it just can find gcc-4.7-base not gcc-4.7, and when I run "sudo apt-get install g++-4.7", it can find nothing...



Today, I want to install the "bumblebee" and do like this:



sudo add-apt-repository ppa:bumblebee/stable
sudo apt-get update
sudo apt-get install bumblebee bumblebee-nvidia
sudo reboot


but when I run "sudo apt-get install bumblebee bumblebee-nvidia", it tells me the packages can't be find.
The ways I methoded are specially use to ubuntu 12.04, the links is:
Installing gcc 4.7
https://wiki.ubuntu.com/Bumblebee#Installation



What can I do? Thank you!My email is nightmeng@gmail.com





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