How to upgrade GCC, G ++ in Ubuntu

As we all know, GCC does not support "make Uninstall ". A recommended installation method is to install GCC in a path you specify. When you do not need a GCC version number, you only need to remove the corresponding version number.

If you already have an old version number in your system, the simplest method is:

1) join? Personal package archive in the repositories

2. repositoris)

3) upgrade procedure

sudo add-apt-repository ppa:ubuntu-toolchain-r/testsudo apt-get update

Join? New Ppa (peronal package archive) to System

Delete alternative

sudo update-alternatives --remove-all gcc sudo update-alternatives --remove-all g++

Then:

sudo apt-get install gcc-4.8sudo apt-get install g++-4.8

Install GCC and G ++ as alternatives

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 20sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 20sudo update-alternatives --config gccsudo update-alternatives --config g++

Finally:

sudo apt-get updatesudo apt-get upgrade -ysudo apt-get dist-upgrade

Translator's note:

Trial upgrade Effect

Terminal input: gcc-V

Terminal input is as follows:

...

GCC version 4.8.1 (Ubuntu 4.8.1-2ubuntu1 ~ 10.04.1)

Address: http://askubuntu.com/questions/312620/how-do-i-install-gcc-4-8-1-on-ubuntu-13-04