Where can I find a g++ 4.7 package?

Question

Some time ago, I managed to find PPA featuring g++-4.7 build. However, I had to reinstall everything on my machine and I lost name of that PPA. Could anyone point me to it? I tried to find it again, but without any luck. I'm on Ubuntu 11.10 installation.

Solution

The Toolchain test builds PPA contains many packages including gcc-4.7.

You can add the repository using

sudo add-apt-repository ppa:ubuntu-toolchain-r/test

Then, to install it use

sudo apt-get update
sudo apt-get install g++-4.7

To change the default compiler use update-alternatives

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-4.6
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.7 40 --slave /usr/bin/g++ g++ /usr/bin/g++-4.7
sudo update-alternatives --config gcc

Comments

[Thomas Ward]

I strongly recommend you do not install 4.7 in place of gcc that is with your version. If you do, you run the risk of breaking your system.

[Griwes]

@ThomasWard: I know, I am not a complete newbie.

[Gearoid Murphy]

@Griwes, you may not be a 'newbie' but others might be and his observation is correct.

[Eliah Kagan]

Related. (But if we decide that's a duplicate of this, we should make sure to ask for answers to be merged, as that's about what to do when this doesn't work.)

[Griwes]

Well, I cannot find it now, but I recall doing apt-get install g++-4.7 gcc-4.7...

[Ugo]

Did not work for me. I only see gcc-4.6 (on ubuntu 11.10)

[expert]

How can I uninstall g++-4.6 without uninstalling g++ ? Currently I have packages g++, g++-4.6 and g++-4.7 installed. as result g++ --version gives me version 4.6.

[expert]

Ah perhaps I need simply rename g++-4.7 to g++

[Lee Goddard]

sudo: add-apt-repository: command not found $ sudo apt-get install software-properties-common python-software-properties