1、源码下载地址=》下载
选择下载的版本，我下的是emacs-26.1.tar.xz 版本
2、解压
xz -d emacs-26.1.tar.xz # 解压成tar文件 tar -xvf emacs-26.1.tar # 解压
3、编译安装
./configure --prefix=/opt/emacs/
如果出现以下错误：
checking for libXaw... configure: error: No X toolkit could be found. If you are sure you want Emacs compiled without an X toolkit, pass --with-x-toolkit=no to configure. Otherwise, install the development libraries for the toolkit that you want to use (e.g. Gtk+) and re-run configure.
解决方案：
安装依赖：
sudo apt-get install build-essential texinfo libx11-dev libxpm-dev libjpeg-dev libpng-dev libgif-dev libtiff-dev libgtk2.0-dev libgtk-3-dev libncurses-dev libxpm-dev automake autoconf
如果出现以下错误：
configure: error: The following required libraries were not found: gnutls Maybe some development libraries/packages are missing? If you don't want to link with them give --with-gnutls=no as options to configure
解决方案：
sudo apt-get install gnutls-dev
如果出现以下警告：
configure: WARNING: This configuration installs a 'movemail' program that does not retrieve POP3 email. By default, Emacs 25 and earlier installed a 'movemail' program that retrieved POP3 email via only insecure channels, a practice that is no longer recommended but that you can continue to support by using './configure --with-pop'. configure: You might want to install GNU Mailutils <https://mailutils.org> and use './configure --with-mailutils'.
解决方案：
./configure --prefix=/opt/emacs/ --with-mailutils --with-pop
最后：
make && make install
添加软连接
ln -s /opt/emacs/bin/emacs /usr/bin/emacs
出现上图说明安装成功了