Installation guide

Prerequisites:

C/C++ build tools (gcc or clang, make)
autotools package (autoconf, automake, autoheader, autom4te...)
system for managing library compiler/linker flags (pkg-config)
SDL - Simple DirectMedia Library (libSDL: "2.0.x")

Platform specific instructions:

Linux distro based on Ubuntu (or another Debian-like)
- sudo apt-get install build-essential autoconf autotools-dev pkg-config libsdl2-dev
Linux distro based on Fedora (or another RedHat-like)
- sudo dnf install gcc make autoconf automake pkgconfig SDL2-devel (in older distros there was yum package manager instead of dnf)
MacOS (tested on 10.12+)
- first, "Xcode Command Line Tools" is required (for clang & make)
- in addition to that you will need install tools & libs via MacPorts: sudo port install autoconf automake pkgconfig libsdl2, or with Brew: brew install autoconf automake pkg-config sdl2
- tested on Apple Silicon M1 and latest MacOS 11.0+

Building:

generate configuration scripts with autoreconf -vfi
run script ./configure (for all available options/switches type ./configure --help)
then make to build
(optional) install to the system directories with sudo make install