Cannot find `glutin` in `glium` when using Conrod - rust

Question

I am attempting to add a GUI to a small project of mine using Conrod. I have managed to work my way down to 3 compilation errors:
error[E0433]: failed to resolve. Could not find `glutin` in `glium`
--> src/support/mod.rs:88:53
|
88 | pub fn next(&mut self, events_loop: &mut glium::glutin::EventsLoop) -> Vec<glium::glutin::Event> {
| ^^^^^^ Could not find `glutin` in `glium`
error[E0433]: failed to resolve. Could not find `glutin` in `glium`
--> src/support/mod.rs:88:87
|
88 | pub fn next(&mut self, events_loop: &mut glium::glutin::EventsLoop) -> Vec<glium::glutin::Event> {
| ^^^^^^ Could not find `glutin` in `glium`
error[E0433]: failed to resolve. Could not find `glutin` in `glium`
--> src/support/mod.rs:106:24
|
106 | glium::glutin::ControlFlow::Break
| ^^^^^^ Could not find `glutin` in `glium`
I've studied the examples that ship with Conrod (particularly the text_edit.rs example) and have successfully compiled and run them. As far as I can tell, they use the same techniques (as my code is directly inspired by their examples), yet does not suffer from the unresolved imports of glutin.
Furthermore, I cannot seem to find any reference to glutin in the project directory itself:
$> pwd
~/dev/conrod/src
$> tree.
.
├── backend
│ ├── gfx.rs
│ ├── glium.rs
│ ├── mod.rs
│ ├── piston
│ │ ├── draw.rs
│ │ ├── event.rs
│ │ └── mod.rs
│ └── winit.rs
├── border.rs
├── color.rs
├── cursor.rs
├── event.rs
├── graph
│ ├── algo.rs
│ ├── depth_order.rs
│ └── mod.rs
├── guide
│ ├── chapter_1.rs
│ ├── chapter_2.rs
│ └── mod.rs
├── image.rs
├── input
│ ├── global.rs
│ ├── mod.rs
│ ├── state.rs
│ └── widget.rs
├── label.rs
├── lib.rs
├── position
│ ├── matrix.rs
│ ├── mod.rs
│ ├── range.rs
│ └── rect.rs
├── render.rs
├── tests
│ ├── global_input.rs
│ ├── mod.rs
│ ├── ui.rs
│ └── widget_input.rs
├── text.rs
├── theme.rs
├── ui.rs
├── utils.rs
└── widget
├── bordered_rectangle.rs
├── builder.rs
├── button.rs
├── canvas.rs
├── collapsible_area.rs
├── drop_down_list.rs
├── envelope_editor.rs
├── file_navigator
│ ├── directory_view.rs
│ └── mod.rs
├── graph
│ ├── mod.rs
│ └── node.rs
├── grid.rs
├── id.rs
├── list.rs
├── list_select.rs
├── matrix.rs
├── mod.rs
├── number_dialer.rs
├── plot_path.rs
├── primitive
│ ├── image.rs
│ ├── line.rs
│ ├── mod.rs
│ ├── point_path.rs
│ ├── shape
│ │ ├── circle.rs
│ │ ├── mod.rs
│ │ ├── oval.rs
│ │ ├── polygon.rs
│ │ ├── rectangle.rs
│ │ └── triangles.rs
│ └── text.rs
├── range_slider.rs
├── rounded_rectangle.rs
├── scrollbar.rs
├── scroll.rs
├── slider.rs
├── tabs.rs
├── text_box.rs
├── text_edit.rs
├── title_bar.rs
├── toggle.rs
└── xy_pad.rs
For reference, my Cargo.toml also includes glutin as a dependency:
[features]
default = ["winit", "glium"]
winit = ["conrod/winit"]
glium = ["conrod/glium"]
[dependencies]
conrod = "^0.57"
find_folder = "*"
glutin = "*"

Answer 1

I believe this is a misconception about the module structure of conrod and glium.
The conrod crate has a number of backend modules, containing utility functions for each of the different backends. conrod::backend::glium is this module for glium, and it contains structures and things useful for using conrod with glium.
In your case, however, I think you mistook this module for glium itself.
glium is a separate crate from conrod, and you'll need to depend on it much like you depend on glutin. glium does indeed have a glium::conrod property, so if you do pull it in with extern crate glium; rather than using conrod::backend::glium, it should "just work"!
You'll need to add some line glium = 0.x in your Cargo.toml as well, but that should be trivial.