2 - Les distributions et les noyaux

$ sudo !!
sudo cargo build --release
[sudo] Mot de passe de weetoz : 
   Compiling void v1.0.2
   Compiling rand v0.3.14
   Compiling alsa-sys v0.1.0
   Compiling kernel32-sys v0.2.2
Build failed, waiting for other jobs to finish...
failed to run custom build command for `alsa-sys v0.1.0`
Process didn't exit successfully: `/home/weetoz/Documents/maschiso/maschine.rs-master/target/release/build/alsa-sys-cb5eb93214e6e313/build-script-build` (exit code: 101)
--- stderr
thread '<main>' panicked at 'called `Result::unwrap()` on an `Err` value: "`\"pkg-config\" \"--libs\" \"--cflags\" \"alsa\"` did not exit successfully: exit code: 1\n--- stdout\nPackage alsa was not found in the pkg-config search path.\nPerhaps you should add the directory containing `alsa.pc\'\nto the PKG_CONFIG_PATH environment variable\nNo package \'alsa\' found\n"', src/libcore/result.rs:688

curl -sSf https://static.rust-lang.org/rustup.sh | sh

/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:8:5: 9:6 error: the trait bound `Self: std::marker::Sized` is not satisfied [E0277]
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:8     fn readable(&mut self, event_loop: &mut EventLoop<Self>, token: Token, hint: ReadHint) {
                                                                                            ^
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:8:5: 9:6 help: run `rustc --explain E0277` to see a detailed explanation
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:8:5: 9:6 help: consider adding a `where Self: std::marker::Sized` bound
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:8:5: 9:6 note: required by `event_loop::EventLoop`
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:11:5: 12:6 error: the trait bound `Self: std::marker::Sized` is not satisfied [E0277]
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:11     fn writable(&mut self, event_loop: &mut EventLoop<Self>, token: Token) {
                                                                                             ^
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:11:5: 12:6 help: run `rustc --explain E0277` to see a detailed explanation
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:11:5: 12:6 help: consider adding a `where Self: std::marker::Sized` bound
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:11:5: 12:6 note: required by `event_loop::EventLoop`
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:14:5: 15:6 error: the trait bound `Self: std::marker::Sized` is not satisfied [E0277]
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:14     fn notify(&mut self, event_loop: &mut EventLoop<Self>, msg: Self::Message) {
                                                                                             ^
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:14:5: 15:6 help: run `rustc --explain E0277` to see a detailed explanation
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:14:5: 15:6 help: consider adding a `where Self: std::marker::Sized` bound
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:14:5: 15:6 note: required by `event_loop::EventLoop`
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:17:5: 18:6 error: the trait bound `Self: std::marker::Sized` is not satisfied [E0277]
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:17     fn timeout(&mut self, event_loop: &mut EventLoop<Self>, timeout: Self::Timeout) {
                                                                                             ^
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:17:5: 18:6 help: run `rustc --explain E0277` to see a detailed explanation
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:17:5: 18:6 help: consider adding a `where Self: std::marker::Sized` bound
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:17:5: 18:6 note: required by `event_loop::EventLoop`
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:20:5: 21:6 error: the trait bound `Self: std::marker::Sized` is not satisfied [E0277]
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:20     fn interrupted(&mut self, event_loop: &mut EventLoop<Self>) {
                                                                                             ^
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:20:5: 21:6 help: run `rustc --explain E0277` to see a detailed explanation
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:20:5: 21:6 help: consider adding a `where Self: std::marker::Sized` bound
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/handler.rs:20:5: 21:6 note: required by `event_loop::EventLoop`
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/nonblock.rs:67:5: 67:55 error: the trait bound `Self: std::marker::Sized` is not satisfied [E0277]
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/nonblock.rs:67     fn into_non_block(self) -> Result<NonBlock<Self>>;
                                                                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/nonblock.rs:67:5: 67:55 help: run `rustc --explain E0277` to see a detailed explanation
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/nonblock.rs:67:5: 67:55 help: consider adding a `where Self: std::marker::Sized` bound
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/nonblock.rs:67:5: 67:55 note: required by `nonblock::NonBlock`
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:57:9: 57:19 error: the trait bound `M: std::marker::Send` is not satisfied [E0277]
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:57 impl<M> fmt::Debug for Notify<M> {
                                                                                                ^~~~~~~~~~
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:57:9: 57:19 help: run `rustc --explain E0277` to see a detailed explanation
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:57:9: 57:19 help: consider adding a `where M: std::marker::Send` bound
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:57:9: 57:19 note: required by `notify::Notify`
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:58:5: 60:6 error: the trait bound `M: std::marker::Send` is not satisfied [E0277]
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:58     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
                                                                                            ^
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:58:5: 60:6 help: run `rustc --explain E0277` to see a detailed explanation
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:58:5: 60:6 help: consider adding a `where M: std::marker::Send` bound
/home/weetoz/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.3.7/src/notify.rs:58:5: 60:6 note: required by `notify::Notify`
error: aborting due to 8 previous errors
Build failed, waiting for other jobs to finish...
error: Could not compile `mio`.

$ rustc --explain E0277
You tried to use a type which doesn't implement some trait in a place which
expected that trait. Erroneous code example:

```
// here we declare the Foo trait with a bar method
trait Foo {
    fn bar(&self);
}

// we now declare a function which takes an object implementing the Foo trait
fn some_func<T: Foo>(foo: T) {
    foo.bar();
}

fn main() {
    // we now call the method with the i32 type, which doesn't implement
    // the Foo trait
    some_func(5i32); // error: the trait bound `i32 : Foo` is not satisfied
}
```

In order to fix this error, verify that the type you're using does implement
the trait. Example:

```
trait Foo {
    fn bar(&self);
}

fn some_func<T: Foo>(foo: T) {
    foo.bar(); // we can now use this method since i32 implements the
               // Foo trait
}

// we implement the trait on the i32 type
impl Foo for i32 {
    fn bar(&self) {}
}

fn main() {
    some_func(5i32); // ok!
}
```

Or in a generic context, an erroneous code example would look like:

```
fn some_func<T>(foo: T) {
    println!("{:?}", foo); // error: the trait `core::fmt::Debug` is not
                           //        implemented for the type `T`
}

fn main() {
    // We now call the method with the i32 type,
    // which *does* implement the Debug trait.
    some_func(5i32);
}
```

Note that the error here is in the definition of the generic function: Although
we only call it with a parameter that does implement `Debug`, the compiler
still rejects the function: It must work with all possible input types. In
order to make this example compile, we need to restrict the generic type we're
accepting:

```
use std::fmt;

// Restrict the input type to types that implement Debug.
fn some_func<T: fmt::Debug>(foo: T) {
    println!("{:?}", foo);
}

fn main() {
    // Calling the method is still fine, as i32 implements Debug.
    some_func(5i32);

    // This would fail to compile now:
    // struct WithoutDebug;
    // some_func(WithoutDebug);
}
```

Rust only looks at the signature of the called function, as such it must
already specify all requirements that will be used for every type parameter.