bevy_dylib

A single-file crate that re-exports bevy as a cdylib. Used to enable dynamic linking for fast iterative compiles during development.

Purpose

When the dynamic_linking feature is on, the bevy umbrella crate's src/lib.rs adds use bevy_dylib;. Cargo builds bevy_dylib as a shared library (.dll/.so/.dylib) and links the rest of the project against it. Subsequent rebuilds only relink against the dylib instead of recompiling the whole engine.

This is purely a development optimization — you do not ship a dynamic_linking build to production.

Directory layout

crates/bevy_dylib/src/
└── lib.rs    # `pub use bevy_internal::*;`

Key abstractions

Symbol	File	Description
pub use bevy_internal::*	crates/bevy_dylib/src/lib.rs	The whole point of the crate.

Cargo.toml sets crate-type = ["dylib"] so cargo emits a shared library.

Integration points

• Depends on: bevy_internal.
• Used by: The dynamic_linking cargo feature on the top-level bevy crate.

Entry points for modification

• Don't. The whole crate is one re-export and a Cargo.toml. If you need to change anything, you probably actually want to change bevy_internal.

See also

• bevy_internal.
• getting-started → fast compiles.