install emacs-24.5 from source centos7

install-emacs-24.5-from-source-centos7install-emacs-24.5-from-source-centos7.sh

wget http://mirror.sdunix.com/gnu/emacs/emacs-24.5.tar.gz
tar zxvfp emacs-24.5.tar.gz 
cd emacs-24.5/
./configure 
sudo yum -y install libXpm-devel libjpeg-turbo-devel openjpeg-devel openjpeg2-devel turbojpeg-devel giflib-devel libtiff-devel gnutls-devel libxml2-devel GConf2-devel dbus-devel wxGTK-devel gtk3-devel
./configure 
make 
sudo make install

Unreachable : http://mirror.sdunix.com/gnu/emacs/emacs-24.5.tar.gz
any alternative cdn?

here http://git.savannah.gnu.org/cgit/emacs.git/snapshot/emacs-emacs-25.1-rc2.tar.gz
install according INSTALL.REPO

Thanks @apmattil

$ sudo yum -y install libXpm-devel libjpeg-turbo-devel openjpeg-devel openjpeg2-devel turbojpeg-devel giflib-devel libtiff-devel gnutls-devel libxml2-devel GConf2-devel dbus-devel wxGTK-devel gtk3-devel
$ wget http://git.savannah.gnu.org/cgit/emacs.git/snapshot/emacs-25.1.tar.gz
$ tar zxvf emacs-25.1.tar.gz
$ cd emacs-25.1
$ ./autogen
$ ./configure --without-makeinfo # incase makeinfo is not available on your system: Example Centos 7 else `./configure` would do
$ sudo make install

## verify installation
$ which emacs
$ emacs --version
GNU Emacs 25.1.1

Note: Refer INSTALL.REPO

@swapab Thanks, but line 5 is ./autogen.sh not ./autogen

i just did this, and it is still showing version 24.3.1. Can you not have two versions of emacs installed at once?