rustc Basics

Purpose

Guide agents through Rust compiler invocation: RUSTFLAGS, Cargo profile configuration, build modes, MIR and assembly inspection, monomorphization, and common compilation error patterns.

Triggers

• "How do I configure a release build in Rust for maximum performance?"
• "How do I see the assembly output for a Rust function?"
• "What is monomorphization and why is it making my compile slow?"
• "How do I enable LTO in Rust?"
• "My Rust binary is too large — how do I shrink it?"
• "How do I read Rust MIR output?"

Workflow

1. Choose a build mode