No_std program
A no_std Rust crate is configured not to link the standard library by default, relying instead on core and any explicitly selected libraries.
Rust in Action: Systems programming concepts and techniques
no_std is a Rust crate attribute that prevents automatic linkage of the Rust standard library.
- How it is used
- Uses `#![no_std]` to write a kernel or embedded program without relying on operating-system-provided dynamic memory allocation.
- How deep it goes
- Explains the attribute’s effect and works through a minimal kernel, including manual panic handling, without detailing standard-library internals.
- Examples
- Shows a kernel that writes to a framebuffer, plus aborting and infinite-loop panic handlers.
- What you can do after
- Build it from scratch as a minimal Rust kernel with `#![no_std]`, a custom entry point, and a panic handler.
Read how Rust in Action: Systems programming concepts and techniques explains no_std program →
Learn Rust in a Month of Lunches
The no_std attribute prevents a Rust program from linking the standard library by default.
- How it is used
- Uses `#![no_std]` to omit the standard library when targeting small devices with limited memory or space.
- How deep it goes
- Defines the attribute and names unavailable standard-library types, without explaining how to replace them.
- Examples
- Uses small devices with limited memory or space as the motivating context.
- What you can do after
- Understand why a Rust program might omit the standard library for a small device.
Read how Learn Rust in a Month of Lunches explains no_std program →
Related concepts
- standard libraryconfigures · A standard library is a collection of reusable modules, types, functions, APIs, and other facilities distributed with a programming language implementation or platform.
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