If you want something modern connected with OS-9, then I have good news! https://www.theregister.com/personal-tech/2026/06/25/foss-dev-builds-a-basic-compiler-

If you want something modern connected with OS-9, then I have good news! https://www.theregister.com/personal-tech/2026/06/25/foss-dev-builds-a-basic-compiler-using-llvm/5262171 https://www.theregister.com/personal-tech/2026/06/25/foss-de...