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moonbit-c-binding

Write MoonBit FFI bindings to C libraries with native stubs.

4|1|Updated Feb 15, 2026
Search Tags:#memory management#native compilation#c interop#ffi#moonbit#c binding
One-click install
npx skills add https://github.com/Haoxincode/MoonBash --skill moonbit-c-binding
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: moonbit-c-binding
Source: https://github.com/Haoxincode/MoonBash/tree/main/.agents/skills/moonbit-c-binding
Command: npx skills add https://github.com/Haoxincode/MoonBash --skill moonbit-c-binding

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill simplifies the complex process of integrating C libraries with MoonBit, enabling developers to leverage existing C codebases within their MoonBit projects without extensive manual FFI setup.

Core Features & Use Cases

  • FFI Declarations: Guides on writing extern "c" declarations for C functions.
  • C Stub Generation: Assists in creating necessary C stub files (moonbit.h).
  • Configuration: Helps configure moon.pkg or moon.pkg.json for native builds.
  • Memory Management: Provides guidance on ownership annotations (#borrow, #owned) and wrapping C pointers.
  • String Conversion: Details on converting strings between MoonBit and C.
  • Use Case: You need to use a C library for image processing in your MoonBit application. This Skill will guide you through setting up the native compilation, declaring the C functions, writing the C stubs, and handling memory management for the library's data structures.

Quick Start

Use the moonbit-c-binding skill to add extern "c" declarations for a C library.

Frequently Asked Questions about moonbit-c-binding

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I call C functions from MoonBit using native FFI?▼

To call C functions from MoonBit using native FFI, you write `extern "c"` declarations in MoonBit and create corresponding C stub files using `moonbit.h` to bridge the calls.

How do I configure moon.pkg for native compilation and C stubs?▼

Configuring `moon.pkg` for native compilation involves specifying `native-stub` and `link.native` settings to properly link C libraries and compile stubs for your MoonBit package.

How do I manage memory and C pointers in MoonBit FFI bindings?▼

Manage C pointers in MoonBit FFI by using ownership annotations like `#borrow` and `#owned`, and wrap raw C pointers with external objects and finalizers to ensure safe cleanup.

Can I use AddressSanitizer to validate MoonBit C bindings?▼

Yes, you can validate MoonBit C bindings with AddressSanitizer to detect memory leaks and unsafe pointer access across the FFI boundary during native compilation.

What is the best way to convert strings between MoonBit and C?▼

The best way to convert strings between MoonBit and C is to use the dedicated string conversion functions provided by the native FFI guidelines, ensuring safe data transfer across boundaries.

How do I implement C callbacks in MoonBit?▼

Implement C callbacks in MoonBit by setting up callback trampolines, which allow native C code to safely invoke MoonBit functions passed through the FFI interface.

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