How to install the latest Emacs in 12.04?

Question

In 12.04 , emacs version is 23.3.1. How to install the latest version ?

I remember there is a PPA about the newer Emacs.

Emacs 24.5 can be compiled and installed manually in 12.04?

Is here anyone who compiles Emacs 24.5 in Ubuntu 12.04?

Which one should I use sudo apt-get build-dep emacs23 or sudo apt-get build-dep emacs24, if I compile Emacs 24.5 in 12.04?

Answer 1

The package emacs24 isn't available on Precise, the command

sudo apt-get build-dep emacs24

wouldn't help.

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To compile the current (2015-11-25) stable release

sudo apt-get install checkinstall
mkdir -p ~/src
cd ~/src
wget http://ftp.gnu.org/gnu/emacs/emacs-24.5.tar.gz
tar xf emacs-24.5.tar.gz
cd emacs-24.5
./configure
make
sudo checkinstall

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Or you could use the PPA ppa:ubuntu-elisp/ppa to install the bleeding edge version.

I quote (from here):

The Official ;-) Ubuntu Emacs Daily Snapshot PPA.

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sudo apt-add-repository ppa:ubuntu-elisp/ppa
sudo apt-get update
sudo apt-get install emacs-snapshot

The commands above will install an additional version of emacs in your system.