CJIT is a C interpreter based on tinyCC that compiles C code in-memory and runs it live. It is released as a small, all-in-one executable that can do a lot, including call functions from any installed library on Linux, Windows, and MacOSX.

More info on Dyne.org/CJIT.

🚀 Quick start

Download the CJIT executable for your system

• Windows x86 64bit: cjit.exe
• Apple/OSX: cjit-Darwin-arm64
• GNU/Linux: cjit-Linux-x86_64-static

and run it with c source files as well dynamic libraries as arguments:

./cjit.exe mysource.c mylib.dll

CJIT can do a lot more! continue reading its tutorial for a hands-on introduction.

📖 The CJIT tutorial

💾 Downloads

We provide ready to execute binary builds on github releases.

Some systems may warn you about a virus in the file. There isn't, we submit each built executable to Virustotal via github actions.

⚙️ Build from source

There are various build targets, just type make to have a list:

✨ Welcome to the CJIT build system
🛟 Usage: make <target>
👇 List of targets:
 _
 ------           __ Production targets
 musl-linux       🗿 Build a fully static cjit using musl-libc on Linux
 linux-x86        🐧 Build a dynamically linked cjit using libs found on Linux x86
 win-wsl          🪟 Build cjit.exe for WIN64 on an Ubuntu WSL VM using gcc-mingw-w64
 win-native       🪟 Build cjit.exe for WIN64 on Windows Server
 apple-osx        🍎 Build cjit.command for Apple/OSX using clang static
 _
 ------           __ Debugging targets
 debug-asan       🔬 Build using the address sanitizer to detect memory leaks
 _
 ------           __ Testing targets
 check            🧪 Run all tests using the currently built binary ./cjit
 _
 clean            🧹 Clean the source from all built objects

🔬 Internals

CJIT is a bit complex inside.

1. It relies on tinycc to compile C code in-memory and run it immediately.
2. It detects automatically the system on which its running and auto-configures to support most features.
3. It embeds all C code and headers in cjit/assets making them available to all running code.
4. To embed them creates a tar.gz of assets at build-time and decompresses them at run-time in a temporary dir.
5. It ships a non-exclusive, opinionated selection of libraries useful to quickly script advanced applications in C.

The CJIT's Frequently Asked Questions page may provide more information.

📑 License

CJIT is copyright (C) 2024 by the Dyne.org foundation

CJIT is distributed under the GNU General Public License v3

TinyCC is copyright (C) 2001-2004 by Fabrice Bellard

TinyCC is distributed under the GNU Lesser General Public License

For more information on licensing please refer to the Reuse report and license texts included in LICENSES.