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Clx

Compile Lua to Native Executables Through C++20

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Hi HN,clx is an ahead-of-time compiler for standard Lua that generates C++20 and produces standalone native executables through GCC, Clang or MSVC.The project started as an experiment to see whether modern C++ could be used as a portable compiler backend instead of LLVM or direct machine code generation. The generated code is then compiled and optimized by the host toolchain.The latest release replaces the previous NaN-tagged value representation with a new shadow-types implementation, adds full int64 support, improves native arithmetic code generation and adds ARM64 macOS coroutine support.Performance is typically much faster than the Lua interpreter and can outperform LuaJIT on some computation-heavy workloads while remaining fully ahead-of-time compiled.The repository also contains graphical examples written in Lua, including a Pong game and a Mandelbrot explorer using a Sokol binary module (using the clx C++ API)I'd be very interested in feedback on clx :)

HN · launched Jul 11, 2026 · 143 upvotes (top 5%) · 0 views

Niche: programming language compilers · 77 launches, 2 in the last 7 days ▼ -60% · Explore this niche →

Category and tags
  • Horizontal
  • Dev tools
  • Developer
  • Not AI
  • Hobby / open-source project

Visit website ↗ Source listing ↗

More like this: all 77 launches in programming language compilers →

Could you build this?

No Building an ahead-of-time compiler that accurately translates dynamic Lua semantics into idiomatic, performant C++20 requires specialized compiler design knowledge, AST transformations, and runtime environment emulation.

What it would actually take: The system requires an AST parser for Lua, a semantic analysis pass to track dynamic variables, tables, metatables, and coroutines, and an emitter producing C++20 code mapped onto a custom C++ runtime library that implements Lua's garbage collector and dynamic typing. The hardest challenge is faithfully replicating Lua's full semantics (e.g., coroutines, tail calls, metamethods) ahead-of-time without relying on an embedded interpreter VM. This requires deep domain expertise in compiler engineering and language runtimes.

Discussion

20 comments analyzed.

Competitors mentioned: Love.js for Lua-to-web deployment, SFML or raylib as game library alternatives, LuaJIT for game/app development

Concerns raised: Release archives extract to current directory instead of dedicated subdirectory, WebAssembly/web deployment not currently supported, Dynamic code loading (loadfile, runtime interpretation) not implemented, Project is relatively young with potential bugs or missing features

Feature requests: Multi-platform GUI support through native modules, Environment manipulation capabilities in C++ API for sandboxing compiled modules, Objective-C runtime support for macOS/iOS native GUIs, WebAssembly backend for web deployment

Competitors

Other products that read as similar to this one : 290 launches clear the similarity bar, closest 8 shown.

Attention rank: #17 of 291 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 250 days after the earliest competitor.

Related data

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