更新gcc到4.8

7down vote

If you want to keep your old gcc, as I do, then do this instead:

sudo add-apt-repository ppa:ubuntu-toolchain-r/testsudo apt-get updatesudo apt-get install gcc-4.8 g++-4.8

Then to compile with older gcc, mine was 4.7:

gcc main.c

To compile with gcc 4.8:

gcc-4.8 main.c

You might find typing the extra -4.8 annoying, in which case follow the other answers given by raven and Amir. I quite like this method, as it gives me the choice to use a fall-back version (4.7) if I encounter a bug!

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