• A set of documentaion files in /docs/, particularly:
  • readme.en.md - Overview
  • intro.en.md - SP-Forth specifics
• The documentation online at https://spf.sourceforge.net/
• Some additional hints in Wiki
• The sources in UTF-8 encoding in the repository spf4-utf8 (since some files in the spf repository are shown incorrectly via the GitHub online viewer)
• https://github.com/yarus23/SPF.JS

Clone the sources into your spf4 working tree root directory, as

git clone https://github.com/rufig/spf/ ~/spf4 && cd ~/spf4/src/

or download the ZIP archive and unpack it into your arbitrary spf4 working tree root forlder.

Run src/compile.bat — it will build spf4.exe in the spf4 working tree root.

Prerequisites: powershell to download the initial binary.

In the sub-directory src/ run make — it will build spf4 in the spf4 working tree root (near to the directorory src).

Prerequisites (in Debian or Ubuntu, as an example):

dpkg --add-architecture i386
apt update
apt install  coreutils ca-certificates git wget build-essential gcc-multilib