Function cargo::core::compiler::unit_dependencies::build_unit_dependencies

pub fn build_unit_dependencies<'a, 'cfg>(
    bcx: &'a BuildContext<'a, 'cfg>, 
    resolve: &'a Resolve, 
    std_resolve: Option<&'a Resolve>, 
    roots: &[Unit<'a>], 
    std_roots: &[Unit<'a>]
) -> CargoResult<UnitGraph<'a>>