I think the likely path would be a compiler that compiles some other language to BrainFuck. As BrainFuck is Turing-complete, such a compiler can be constructed.

I think the likely path would be a compiler that compiles some other language to BrainFuck. As BrainFuck is Turing-complete, such a compiler can be constructed. An example of a compiler for an even more restricted environment might be https://github.com/xoreaxeaxeax/movfuscator https://github.com/xoreaxeaxeax/movfuscator Edit: in the same vein there's also https://esolangs.org/wiki/Higher_Subleq https://esolangs.org/wiki/Higher_Subleq Further edit: The user Someone posted a link in this thread to several existing compilers that already target Brainfuck (!). That's awesome.