pub fn build_map(cx: &mut Context<'_, '_>) -> CargoResult<()>Expand description
Computes several maps in Context.
build_scripts: A map that tracks which build scripts each package depends on.build_explicit_deps: Dependency statements emitted by build scripts from a previous run.build_script_outputs: Pre-populates this with any overridden build scripts.
The important one here is build_scripts, which for each (package, metadata) stores a BuildScripts object which contains a list of
dependencies with build scripts that the unit should consider when linking.
For example this lists all dependencies’ -L flags which need to be
propagated transitively.
The given set of units to this function is the initial set of targets/profiles which are being built.