Question

13

Problem adding a PPA to install gcc-4.7

rated 0 times [ 13] [ 0] / answers: 1 / hits: 17538 / 2 Years ago, sun, august 7, 2022, 5:06:01

I want to install GCC compiler 4.7 to use C++11 features. I have looked on the internet for instructions, and I found in several websites these steps:

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

sudo apt-get update  

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

The problem is that my console freezes when adding the ppa.

At first I thought it was due to having an old Ubuntu version (11.04). So I have upgraded to 11.10 and then 12.04, and everything seems to work OK. But still having the same problem.

How to fix this issue?

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pardsea

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answered 2 Years ago edseager · Accepted Answer

The error is that you mispelled the PPA. Try this:

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

sudo apt-get update  

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

If it doesn't work, create the source file manually:

sudo nano /etc/apt/sources.list.d/toolchain.list

Paste this content:

deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu precise main   

deb-src http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu precise main

Save the file with Ctrl-K and then press Y
key to confirm saving.

After adding those lines, issue this command to fix the key error:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1E9377A2BA9EF27F

Then run these commands in the terminal

sudo apt-get update

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