An interpreter and compiler for the Brainfuck language.


Brainrust 🧠

An interpreter and compiler for the Brainfuck language.


You need a LLVM 16.0.* installation on your system. On Windows, you may need to build LLVM from source, since the pre-built binaries do not include everything you need (see below).

Building LLVM from Source on Windows

You will have to have Visual Studio installed.

git clone
cd llvm-project
git checkout tags/llvmorg-16.0.4
mkdir build
cd build
cmake -DLLVM_ENABLE_PROJECTS=clang -A x64 -Thost=x64 ..\llvm

This creates a file called LLVM.sln. You can open that file in Visual Studio, choose the desired build type (e.g. "Release") and build the BUILD_ALL target.

Make sure to add the /bin folder of the resulting build artifacts to PATH. Verify that it worked:

clang --version

This should yield something like this:

clang version 16.0.4
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\dev\llvm-project\build\Release\bin

Getting Started

Run the program using cargo. Pass --help to see the available options.

cargo run -- --help

To run an example program using the built-in interpreter, type:

cargo run -- -r programs/hello_world.b

To compile a program, type:

cargo run -- -o hello_world.exe programs/hello_world.b

The compiler uses clang for linking. Make sure that clang is available in the PATH.

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