Posts tagged "rustc"

Rust cannot finish name resolution before expanding macros because expansion can create new names and new macros. Follow the compiler's iterative expansion loop.

Rust's incremental cache is a dependency graph, not a saved compiler process. Learn what an edit dirties, how green nodes are recovered, and why Cargo may still run rustc.

Rust 1.97 forwards successful linker output through a special lint. Learn who produced the message, why -D warnings ignores it, and how to investigate it.

A measured decision tree for slow Rust builds: use cargo --timings for the shape, the Cargo fingerprint log for unexpected rebuilds, and -Ztime-passes for the phase inside one crate.