Remove internal liblog

This commit deletes the internal liblog in favor of the implementation that
lives on crates.io. Similarly it's also setting a convention for adding crates
to the compiler. The main restriction right now is that we want compiler
implementation details to be unreachable from normal Rust code (e.g. requires a
feature), and by default everything in the sysroot is reachable via `extern
crate`.

The proposal here is to require that crates pulled in have these lines in their
`src/lib.rs`:

    #![cfg_attr(rustbuild, feature(staged_api, rustc_private))]
    #![cfg_attr(rustbuild, unstable(feature = "rustc_private", issue = "27812"))]

This'll mean that by default they're not using these attributes but when
compiled as part of the compiler they do a few things:

* Mark themselves as entirely unstable via the `staged_api` feature and the
  `#![unstable]` attribute.
* Allow usage of other unstable crates via `feature(rustc_private)` which is
  required if the crate relies on any other crates to compile (other than std).

8 files changed, 0 insertions, 223 deletions

diff --git a/src/test/run-pass-fulldeps/auxiliary/logging_right_crate.rs b/src/test/run-pass-fulldeps/auxiliary/logging_right_crate.rs
deleted file mode 100644
index db26b10fc67..00000000000
--- a/src/test/run-pass-fulldeps/auxiliary/logging_right_crate.rs
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-#![feature(rustc_private)]
-
-#[macro_use] extern crate log;
-
-pub fn foo<T>() {
-    fn death() -> isize { panic!() }
-    debug!("{}", (||{ death() })());
-}
diff --git a/src/test/run-pass-fulldeps/conditional-debug-macro-off.rs b/src/test/run-pass-fulldeps/conditional-debug-macro-off.rs
deleted file mode 100644
index c6beb5ba358..00000000000
--- a/src/test/run-pass-fulldeps/conditional-debug-macro-off.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// compile-flags: -C debug-assertions=no
-// exec-env:RUST_LOG=conditional-debug-macro-off=4
-
-
-#![feature(rustc_private)]
-
-#[macro_use]
-extern crate log;
-
-pub fn main() {
-    // only panics if println! evaluates its argument.
-    debug!("{:?}", { if true { panic!() } });
-}
diff --git a/src/test/run-pass-fulldeps/logging-enabled-debug.rs b/src/test/run-pass-fulldeps/logging-enabled-debug.rs
deleted file mode 100644
index 3ae4884ce47..00000000000
--- a/src/test/run-pass-fulldeps/logging-enabled-debug.rs
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// compile-flags:-C debug-assertions=no
-// exec-env:RUST_LOG=logging-enabled-debug=debug
-
-
-#![feature(rustc_private)]
-
-#[macro_use]
-extern crate log;
-
-pub fn main() {
-    if log_enabled!(log::DEBUG) {
-        panic!("what?! debugging?");
-    }
-}
diff --git a/src/test/run-pass-fulldeps/logging-enabled.rs b/src/test/run-pass-fulldeps/logging-enabled.rs
deleted file mode 100644
index 26261348020..00000000000
--- a/src/test/run-pass-fulldeps/logging-enabled.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// exec-env:RUST_LOG=logging_enabled=info
-// ignore-emscripten: FIXME(#31622)
-
-
-#![feature(rustc_private)]
-
-#[macro_use]
-extern crate log;
-
-pub fn main() {
-    if log_enabled!(log::DEBUG) {
-        panic!("what?! debugging?");
-    }
-    if !log_enabled!(log::INFO) {
-        panic!("what?! no info?");
-    }
-}
diff --git a/src/test/run-pass-fulldeps/logging-right-crate.rs b/src/test/run-pass-fulldeps/logging-right-crate.rs
deleted file mode 100644
index 7caeeb40124..00000000000
--- a/src/test/run-pass-fulldeps/logging-right-crate.rs
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// aux-build:logging_right_crate.rs
-// exec-env:RUST_LOG=logging-right-crate=debug
-
-// This is a test for issue #3046 to make sure that when we monomorphize a
-// function from one crate to another the right top-level logging name is
-// preserved.
-//
-// It used to be the case that if logging were turned on for this crate, all
-// monomorphized functions from other crates had logging turned on (their
-// logging module names were all incorrect). This test ensures that this no
-// longer happens by enabling logging for *this* crate and then invoking a
-// function in an external crate which will panic when logging is enabled.
-
-// pretty-expanded FIXME #23616
-
-extern crate logging_right_crate;
-
-pub fn main() {
-    // this function panicks if logging is turned on
-    logging_right_crate::foo::<isize>();
-}
diff --git a/src/test/run-pass-fulldeps/logging-separate-lines.rs b/src/test/run-pass-fulldeps/logging-separate-lines.rs
deleted file mode 100644
index 183a522bba7..00000000000
--- a/src/test/run-pass-fulldeps/logging-separate-lines.rs
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// ignore-windows
-// exec-env:RUST_LOG=debug
-// compile-flags:-C debug-assertions=y
-// ignore-emscripten: FIXME(#31622)
-
-#![feature(rustc_private)]
-
-#[macro_use]
-extern crate log;
-
-use std::process::Command;
-use std::env;
-use std::str;
-
-fn main() {
-    let args: Vec<String> = env::args().collect();
-    if args.len() > 1 && args[1] == "child" {
-        debug!("foo");
-        debug!("bar");
-        return
-    }
-
-    let p = Command::new(&args[0])
-                    .arg("child")
-                    .output().unwrap();
-    assert!(p.status.success());
-    let mut lines = str::from_utf8(&p.stderr).unwrap().lines();
-    assert!(lines.next().unwrap().contains("foo"));
-    assert!(lines.next().unwrap().contains("bar"));
-}
diff --git a/src/test/run-pass-fulldeps/rust-log-filter.rs b/src/test/run-pass-fulldeps/rust-log-filter.rs
deleted file mode 100644
index 306d24e3177..00000000000
--- a/src/test/run-pass-fulldeps/rust-log-filter.rs
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// exec-env:RUST_LOG=rust_log_filter/foo
-// ignore-emscripten no threads support
-
-#![allow(unknown_features)]
-#![feature(box_syntax, std_misc, rustc_private)]
-
-#[macro_use]
-extern crate log;
-
-use std::sync::mpsc::{channel, Sender, Receiver};
-use std::thread;
-
-pub struct ChannelLogger {
-    tx: Sender<String>
-}
-
-impl ChannelLogger {
-    pub fn new() -> (Box<ChannelLogger>, Receiver<String>) {
-        let (tx, rx) = channel();
-        (box ChannelLogger { tx: tx }, rx)
-    }
-}
-
-impl log::Logger for ChannelLogger {
-    fn log(&mut self, record: &log::LogRecord) {
-        self.tx.send(format!("{}", record.args)).unwrap();
-    }
-}
-
-pub fn main() {
-    let (logger, rx) = ChannelLogger::new();
-
-    let t = thread::spawn(move|| {
-        log::set_logger(logger);
-
-        info!("foo");
-        info!("bar");
-        info!("foo bar");
-        info!("bar foo");
-    });
-
-    assert_eq!(rx.recv().unwrap(), "foo");
-    assert_eq!(rx.recv().unwrap(), "foo bar");
-    assert_eq!(rx.recv().unwrap(), "bar foo");
-    assert!(rx.recv().is_err());
-
-    t.join();
-}
diff --git a/src/test/run-pass/conditional-debug-macro-on.rs b/src/test/run-pass/conditional-debug-macro-on.rs
index b335e20f91d..7da33be7a57 100644
--- a/src/test/run-pass/conditional-debug-macro-on.rs
+++ b/src/test/run-pass/conditional-debug-macro-on.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// exec-env:RUST_LOG=conditional-debug-macro-on=4
-
 pub fn main() {
     // exits early if println! evaluates its arguments, otherwise it
     // will hit the panic.