Install Emacs 27.2 on openSUSE LEAP 15.3 from a source tarball

Install pre-requisited tools

sudo zypper install make gcc automake autoconf libtool aclocal wget
sudo zypper si -d emacs

Download Emacs source tarball

wget https://ftp.gnu.org/pub/gnu/emacs/emacs-27.2.tar.gz

Extract and change directory

tar xzvf emacs-27.2.tar.gz
cd emacs-27.2

Generate makefiles

./configure --prefix=/opt > log

Make

make -j `nproc`

Install

sudo make install

Add path

Add the line below to ~/.bashrc by nano ~/.bashrc

export PATH="/opt/bin:$PATH"