Auto merge of #34611 - Manishearth:rollup, r=Manishearth

Rollup of 7 pull requests

- Successful merges: #34531, #34545, #34551, #34566, #34567, #34574, #34583
- Failed merges:

README.md

@@ -119,7 +119,7 @@ $ make && make install
 If you’d like to build the documentation, it’s almost the same:
 
 ```sh
-./configure
+$ ./configure
 $ make docs
 ```
 

src/bootstrap/build/cc.rs

@@ -90,6 +90,7 @@ fn set_compiler(cfg: &mut gcc::Config,
         // compiler already takes into account the triple in question.
         t if t.contains("android") => {
             if let Some(ndk) = config.and_then(|c| c.ndk.as_ref()) {
+                let target = target.replace("armv7", "arm");
                 let compiler = format!("{}-{}", target, gnu_compiler);
                 cfg.compiler(ndk.join("bin").join(compiler));
             }

src/bootstrap/build/check.rs

@@ -23,6 +23,9 @@ use build_helper::output;
 use bootstrap::{dylib_path, dylib_path_var};
 
 use build::{Build, Compiler, Mode};
+use build::util;
+
+const ADB_TEST_DIR: &'static str = "/data/tmp";
 
 /// Runs the `linkchecker` tool as compiled in `stage` by the `host` compiler.
 ///
@@ -88,6 +91,7 @@ pub fn compiletest(build: &Build,
                    target: &str,
                    mode: &str,
                    suite: &str) {
+    println!("Check compiletest {} ({} -> {})", suite, compiler.host, target);
     let mut cmd = build.tool_cmd(compiler, "compiletest");
 
     // compiletest currently has... a lot of arguments, so let's just pass all
@@ -105,21 +109,23 @@ pub fn compiletest(build: &Build,
     cmd.arg("--host").arg(compiler.host);
     cmd.arg("--llvm-filecheck").arg(build.llvm_filecheck(&build.config.build));
 
-    let mut flags = format!("-Crpath");
+    let mut flags = vec!["-Crpath".to_string()];
     if build.config.rust_optimize_tests {
-        flags.push_str(" -O");
+        flags.push("-O".to_string());
     }
     if build.config.rust_debuginfo_tests {
-        flags.push_str(" -g");
+        flags.push("-g".to_string());
     }
 
-    cmd.arg("--host-rustcflags").arg(&flags);
+    let mut hostflags = build.rustc_flags(&compiler.host);
+    hostflags.extend(flags.clone());
+    cmd.arg("--host-rustcflags").arg(hostflags.join(" "));
 
-    let linkflag = format!("-Lnative={}", build.test_helpers_out(target).display());
-    cmd.arg("--target-rustcflags").arg(format!("{} {}", flags, linkflag));
-
-    // FIXME: needs android support
-    cmd.arg("--android-cross-path").arg("");
+    let mut targetflags = build.rustc_flags(&target);
+    targetflags.extend(flags);
+    targetflags.push(format!("-Lnative={}",
+                             build.test_helpers_out(target).display()));
+    cmd.arg("--target-rustcflags").arg(targetflags.join(" "));
 
     // FIXME: CFG_PYTHON should probably be detected more robustly elsewhere
     let python_default = "python";
@@ -180,6 +186,16 @@ pub fn compiletest(build: &Build,
     }
     build.add_bootstrap_key(compiler, &mut cmd);
 
+    cmd.arg("--adb-path").arg("adb");
+    cmd.arg("--adb-test-dir").arg(ADB_TEST_DIR);
+    if target.contains("android") {
+        // Assume that cc for this target comes from the android sysroot
+        cmd.arg("--android-cross-path")
+           .arg(build.cc(target).parent().unwrap().parent().unwrap());
+    } else {
+        cmd.arg("--android-cross-path").arg("");
+    }
+
     build.run(&mut cmd);
 }
 
@@ -302,7 +318,97 @@ pub fn krate(build: &Build,
     let mut dylib_path = dylib_path();
     dylib_path.insert(0, build.sysroot_libdir(compiler, target));
     cargo.env(dylib_path_var(), env::join_paths(&dylib_path).unwrap());
-    cargo.args(&build.flags.args);
 
+    if target.contains("android") {
+        build.run(cargo.arg("--no-run"));
+        krate_android(build, compiler, target, mode);
+    } else {
+        cargo.args(&build.flags.args);
         build.run(&mut cargo);
+    }
+}
+
+fn krate_android(build: &Build,
+                 compiler: &Compiler,
+                 target: &str,
+                 mode: Mode) {
+    let mut tests = Vec::new();
+    let out_dir = build.cargo_out(compiler, mode, target);
+    find_tests(&out_dir, target, &mut tests);
+    find_tests(&out_dir.join("deps"), target, &mut tests);
+
+    for test in tests {
+        build.run(Command::new("adb").arg("push").arg(&test).arg(ADB_TEST_DIR));
+
+        let test_file_name = test.file_name().unwrap().to_string_lossy();
+        let log = format!("{}/check-stage{}-T-{}-H-{}-{}.log",
+                          ADB_TEST_DIR,
+                          compiler.stage,
+                          target,
+                          compiler.host,
+                          test_file_name);
+        let program = format!("(cd {dir}; \
+                                LD_LIBRARY_PATH=./{target} ./{test} \
+                                    --logfile {log} \
+                                    {args})",
+                              dir = ADB_TEST_DIR,
+                              target = target,
+                              test = test_file_name,
+                              log = log,
+                              args = build.flags.args.join(" "));
+
+        let output = output(Command::new("adb").arg("shell").arg(&program));
+        println!("{}", output);
+        build.run(Command::new("adb")
+                          .arg("pull")
+                          .arg(&log)
+                          .arg(build.out.join("tmp")));
+        build.run(Command::new("adb").arg("shell").arg("rm").arg(&log));
+        if !output.contains("result: ok") {
+            panic!("some tests failed");
+        }
+    }
+}
+
+fn find_tests(dir: &Path,
+              target: &str,
+              dst: &mut Vec<PathBuf>) {
+    for e in t!(dir.read_dir()).map(|e| t!(e)) {
+        let file_type = t!(e.file_type());
+        if !file_type.is_file() {
+            continue
+        }
+        let filename = e.file_name().into_string().unwrap();
+        if (target.contains("windows") && filename.ends_with(".exe")) ||
+           (!target.contains("windows") && !filename.contains(".")) {
+            dst.push(e.path());
+        }
+    }
+}
+
+pub fn android_copy_libs(build: &Build,
+                         compiler: &Compiler,
+                         target: &str) {
+    println!("Android copy libs to emulator ({})", target);
+    build.run(Command::new("adb").arg("remount"));
+    build.run(Command::new("adb").args(&["shell", "rm", "-r", ADB_TEST_DIR]));
+    build.run(Command::new("adb").args(&["shell", "mkdir", ADB_TEST_DIR]));
+    build.run(Command::new("adb")
+                      .arg("push")
+                      .arg(build.src.join("src/etc/adb_run_wrapper.sh"))
+                      .arg(ADB_TEST_DIR));
+
+    let target_dir = format!("{}/{}", ADB_TEST_DIR, target);
+    build.run(Command::new("adb").args(&["shell", "mkdir", &target_dir[..]]));
+
+    for f in t!(build.sysroot_libdir(compiler, target).read_dir()) {
+        let f = t!(f);
+        let name = f.file_name().into_string().unwrap();
+        if util::is_dylib(&name) {
+            build.run(Command::new("adb")
+                              .arg("push")
+                              .arg(f.path())
+                              .arg(&target_dir));
+        }
+    }
 }

src/bootstrap/build/config.rs

@@ -368,13 +368,13 @@ impl Config {
                     target.ndk = Some(PathBuf::from(value));
                 }
                 "CFG_I686_LINUX_ANDROID_NDK" if value.len() > 0 => {
-                    let target = "i686-linux-androideabi".to_string();
+                    let target = "i686-linux-android".to_string();
                     let target = self.target_config.entry(target)
                                      .or_insert(Target::default());
                     target.ndk = Some(PathBuf::from(value));
                 }
                 "CFG_AARCH64_LINUX_ANDROID_NDK" if value.len() > 0 => {
-                    let target = "aarch64-linux-androideabi".to_string();
+                    let target = "aarch64-linux-android".to_string();
                     let target = self.target_config.entry(target)
                                      .or_insert(Target::default());
                     target.ndk = Some(PathBuf::from(value));

src/bootstrap/build/dist.rs

@@ -135,7 +135,6 @@ pub fn rustc(build: &Build, stage: u32, host: &str) {
 
     // Prepare the overlay which is part of the tarball but won't actually be
     // installed
-    t!(fs::create_dir_all(&overlay));
     let cp = |file: &str| {
         install(&build.src.join(file), &overlay, 0o644);
     };
@@ -199,7 +198,6 @@ pub fn rustc(build: &Build, stage: u32, host: &str) {
 
         // Copy runtime DLLs needed by the compiler
         if libdir != "bin" {
-            t!(fs::create_dir_all(image.join(libdir)));
             for entry in t!(src.join(libdir).read_dir()).map(|e| t!(e)) {
                 let name = entry.file_name();
                 if let Some(s) = name.to_str() {
@@ -221,7 +219,6 @@ pub fn rustc(build: &Build, stage: u32, host: &str) {
         let cp = |file: &str| {
             install(&build.src.join(file), &image.join("share/doc/rust"), 0o644);
         };
-        t!(fs::create_dir_all(&image.join("share/doc/rust")));
         cp("COPYRIGHT");
         cp("LICENSE-APACHE");
         cp("LICENSE-MIT");
@@ -289,6 +286,7 @@ pub fn std(build: &Build, compiler: &Compiler, target: &str) {
 
 fn install(src: &Path, dstdir: &Path, perms: u32) {
     let dst = dstdir.join(src.file_name().unwrap());
+    t!(fs::create_dir_all(dstdir));
     t!(fs::copy(src, &dst));
     chmod(&dst, perms);
 }

src/bootstrap/build/mod.rs

@@ -128,6 +128,7 @@ pub struct Build {
 ///
 /// These entries currently correspond to the various output directories of the
 /// build system, with each mod generating output in a different directory.
+#[derive(Clone, Copy)]
 pub enum Mode {
     /// This cargo is going to build the standard library, placing output in the
     /// "stageN-std" directory.
@@ -383,8 +384,7 @@ impl Build {
                                        "ui", "ui");
                 }
                 CheckDebuginfo { compiler } => {
-                    if target.target.contains("msvc") ||
-                       target.target.contains("android") {
+                    if target.target.contains("msvc") {
                         // nothing to do
                     } else if target.target.contains("apple") {
                         check::compiletest(self, &compiler, target.target,
@@ -434,8 +434,14 @@ impl Build {
                                            target.target);
                 }
 
+                AndroidCopyLibs { compiler } => {
+                    check::android_copy_libs(self, &compiler, target.target);
+                }
+
+                // pseudo-steps
                 Dist { .. } |
-                Doc { .. } | // pseudo-steps
+                Doc { .. } |
+                CheckTarget { .. } |
                 Check { .. } => {}
             }
         }

src/bootstrap/build/native.rs

@@ -49,6 +49,8 @@ pub fn llvm(build: &Build, target: &str) {
         return
     }
 
+    println!("Building LLVM for {}", target);
+
     let _ = fs::remove_dir_all(&dst.join("build"));
     t!(fs::create_dir_all(&dst.join("build")));
     let assertions = if build.config.llvm_assertions {"ON"} else {"OFF"};
@@ -167,8 +169,10 @@ pub fn compiler_rt(build: &Build, target: &str) {
             "arm" if target.contains("eabihf") => "armhf",
             _ => arch,
         };
-        let target = format!("clang_rt.builtins-{}{}", builtins_arch, os_extra);
-        ("linux".to_string(), target.clone(), target)
+        let target = format!("clang_rt.builtins-{}", builtins_arch);
+        ("linux".to_string(),
+         target.clone(),
+         format!("{}{}", target, os_extra))
     } else if target.contains("apple-darwin") {
         let builtins_arch = match arch {
             "i686" => "i386",

src/bootstrap/build/sanity.rs

@@ -139,6 +139,10 @@ $ pacman -R cmake && pacman -S mingw-w64-x86_64-cmake
 ");
             }
         }
+
+        if target.contains("arm-linux-android") {
+            need_cmd("adb".as_ref());
+        }
     }
 
     for host in build.flags.host.iter() {

src/bootstrap/build/step.rs

@@ -102,6 +102,7 @@ macro_rules! targets {
             // Steps for running tests. The 'check' target is just a pseudo
             // target to depend on a bunch of others.
             (check, Check { stage: u32, compiler: Compiler<'a> }),
+            (check_target, CheckTarget { stage: u32, compiler: Compiler<'a> }),
             (check_linkcheck, CheckLinkcheck { stage: u32 }),
             (check_cargotest, CheckCargoTest { stage: u32 }),
             (check_tidy, CheckTidy { stage: u32 }),
@@ -138,6 +139,9 @@ macro_rules! targets {
             (dist_mingw, DistMingw { _dummy: () }),
             (dist_rustc, DistRustc { stage: u32 }),
             (dist_std, DistStd { compiler: Compiler<'a> }),
+
+            // Misc targets
+            (android_copy_libs, AndroidCopyLibs { compiler: Compiler<'a> }),
         }
     }
 }
@@ -382,37 +386,80 @@ impl<'a> Step<'a> {
                      self.doc_error_index(stage)]
             }
             Source::Check { stage, compiler } => {
-                vec![
+                // Check is just a pseudo step which means check all targets,
+                // so just depend on checking all targets.
+                build.config.target.iter().map(|t| {
+                    self.target(t).check_target(stage, compiler)
+                }).collect()
+            }
+            Source::CheckTarget { stage, compiler } => {
+                // CheckTarget here means run all possible test suites for this
+                // target. Most of the time, however, we can't actually run
+                // anything if we're not the build triple as we could be cross
+                // compiling.
+                //
+                // As a result, the base set of targets here is quite stripped
+                // down from the standard set of targets. These suites have
+                // their own internal logic to run in cross-compiled situations
+                // if they'll run at all. For example compiletest knows that
+                // when testing Android targets we ship artifacts to the
+                // emulator.
+                //
+                // When in doubt the rule of thumb for adding to this list is
+                // "should this test suite run on the android bot?"
+                let mut base = vec![
                     self.check_rpass(compiler),
-                    self.check_rpass_full(compiler),
                     self.check_rfail(compiler),
-                    self.check_rfail_full(compiler),
-                    self.check_cfail(compiler),
-                    self.check_cfail_full(compiler),
-                    self.check_pfail(compiler),
-                    self.check_incremental(compiler),
-                    self.check_ui(compiler),
                     self.check_crate_std(compiler),
                     self.check_crate_test(compiler),
-                    self.check_crate_rustc(compiler),
+                    self.check_debuginfo(compiler),
+                    self.dist(stage),
+                ];
+
+                // If we're testing the build triple, then we know we can
+                // actually run binaries and such, so we run all possible tests
+                // that we know about.
+                if self.target == build.config.build {
+                    base.extend(vec![
+                        // docs-related
+                        self.check_docs(compiler),
+                        self.check_error_index(compiler),
+                        self.check_rustdoc(compiler),
+
+                        // UI-related
+                        self.check_cfail(compiler),
+                        self.check_pfail(compiler),
+                        self.check_ui(compiler),
+
+                        // codegen-related
+                        self.check_incremental(compiler),
                         self.check_codegen(compiler),
                         self.check_codegen_units(compiler),
-                    self.check_debuginfo(compiler),
-                    self.check_rustdoc(compiler),
+
+                        // misc compiletest-test suites
+                        self.check_rpass_full(compiler),
+                        self.check_rfail_full(compiler),
+                        self.check_cfail_full(compiler),
+                        self.check_pretty_rpass_full(compiler),
+                        self.check_pretty_rfail_full(compiler),
+                        self.check_rpass_valgrind(compiler),
+                        self.check_rmake(compiler),
+
+                        // crates
+                        self.check_crate_rustc(compiler),
+
+                        // pretty
                         self.check_pretty(compiler),
                         self.check_pretty_rpass(compiler),
-                    self.check_pretty_rpass_full(compiler),
                         self.check_pretty_rfail(compiler),
-                    self.check_pretty_rfail_full(compiler),
                         self.check_pretty_rpass_valgrind(compiler),
-                    self.check_rpass_valgrind(compiler),
-                    self.check_error_index(compiler),
-                    self.check_docs(compiler),
-                    self.check_rmake(compiler),
+
+                        // misc
                         self.check_linkcheck(stage),
                         self.check_tidy(stage),
-                    self.dist(stage),
-                ]
+                    ]);
+                }
+                return base
             }
             Source::CheckLinkcheck { stage } => {
                 vec![self.tool_linkchecker(stage), self.doc(stage)]
@@ -437,16 +484,20 @@ impl<'a> Step<'a> {
             Source::CheckCFail { compiler } |
             Source::CheckRPassValgrind { compiler } |
             Source::CheckRPass { compiler } => {
-                vec![
+                let mut base = vec![
                     self.libtest(compiler),
-                    self.tool_compiletest(compiler.stage),
+                    self.target(compiler.host).tool_compiletest(compiler.stage),
                     self.test_helpers(()),
-                ]
+                ];
+                if self.target.contains("android") {
+                    base.push(self.android_copy_libs(compiler));
+                }
+                base
             }
             Source::CheckDebuginfo { compiler } => {
                 vec![
                     self.libtest(compiler),
-                    self.tool_compiletest(compiler.stage),
+                    self.target(compiler.host).tool_compiletest(compiler.stage),
                     self.test_helpers(()),
                     self.debugger_scripts(compiler.stage),
                 ]
@@ -459,13 +510,14 @@ impl<'a> Step<'a> {
             Source::CheckPrettyRPassValgrind { compiler } |
             Source::CheckRMake { compiler } => {
                 vec![self.librustc(compiler),
-                     self.tool_compiletest(compiler.stage)]
+                     self.target(compiler.host).tool_compiletest(compiler.stage)]
             }
             Source::CheckDocs { compiler } => {
                 vec![self.libstd(compiler)]
             }
             Source::CheckErrorIndex { compiler } => {
-                vec![self.libstd(compiler), self.tool_error_index(compiler.stage)]
+                vec![self.libstd(compiler),
+                     self.target(compiler.host).tool_error_index(compiler.stage)]
             }
             Source::CheckCrateStd { compiler } => {
                 vec![self.libtest(compiler)]
@@ -529,6 +581,10 @@ impl<'a> Step<'a> {
                 }
                 return base
             }
+
+            Source::AndroidCopyLibs { compiler } => {
+                vec![self.libtest(compiler)]
+            }
         }
     }
 }

src/bootstrap/mk/Makefile.in

@@ -25,6 +25,11 @@ all:
 clean:
 	$(Q)$(BOOTSTRAP) --clean
 
+rustc-stage1:
+	$(Q)$(BOOTSTRAP) --step libtest --stage 1
+rustc-stage2:
+	$(Q)$(BOOTSTRAP) --step libtest --stage 2
+
 docs: doc
 doc:
 	$(Q)$(BOOTSTRAP) --step doc

src/libstd/path.rs

@@ -1057,7 +1057,6 @@ impl PathBuf {
         self._push(path.as_ref())
     }
 
-    #[allow(deprecated)]
     fn _push(&mut self, path: &Path) {
         // in general, a separator is needed if the rightmost byte is not a separator
         let mut need_sep = self.as_mut_vec().last().map(|c| !is_sep_byte(*c)).unwrap_or(false);

src/libsyntax/attr.rs

@@ -34,6 +34,27 @@ thread_local! {
     static USED_ATTRS: RefCell<Vec<u64>> = RefCell::new(Vec::new())
 }
 
+enum AttrError {
+    MultipleItem(InternedString),
+    UnknownMetaItem(InternedString),
+    MissingSince,
+    MissingFeature,
+    MultipleStabilityLevels,
+}
+
+fn handle_errors(diag: &Handler, span: Span, error: AttrError) {
+    match error {
+        AttrError::MultipleItem(item) => span_err!(diag, span, E0538,
+                                                   "multiple '{}' items", item),
+        AttrError::UnknownMetaItem(item) => span_err!(diag, span, E0541,
+                                                      "unknown meta item '{}'", item),
+        AttrError::MissingSince => span_err!(diag, span, E0542, "missing 'since'"),
+        AttrError::MissingFeature => span_err!(diag, span, E0546, "missing 'feature'"),
+        AttrError::MultipleStabilityLevels => span_err!(diag, span, E0544,
+                                                        "multiple stability levels"),
+    }
+}
+
 pub fn mark_used(attr: &Attribute) {
     let AttrId(id) = attr.node.id;
     USED_ATTRS.with(|slot| {
@@ -303,7 +324,7 @@ pub fn find_export_name_attr(diag: &Handler, attrs: &[Attribute]) -> Option<Inte
             if let s@Some(_) = attr.value_str() {
                 s
             } else {
-                diag.struct_span_err(attr.span,
+                struct_span_err!(diag, attr.span, E0533,
                                  "export_name attribute has invalid format")
                                 .help("use #[export_name=\"*\"]")
                                 .emit();
@@ -339,14 +360,16 @@ pub fn find_inline_attr(diagnostic: Option<&Handler>, attrs: &[Attribute]) -> In
             MetaItemKind::List(ref n, ref items) if n == "inline" => {
                 mark_used(attr);
                 if items.len() != 1 {
-                    diagnostic.map(|d|{ d.span_err(attr.span, "expected one argument"); });
+                    diagnostic.map(|d|{ span_err!(d, attr.span, E0534, "expected one argument"); });
                     InlineAttr::None
                 } else if contains_name(&items[..], "always") {
                     InlineAttr::Always
                 } else if contains_name(&items[..], "never") {
                     InlineAttr::Never
                 } else {
-                    diagnostic.map(|d|{ d.span_err((*items[0]).span, "invalid argument"); });
+                    diagnostic.map(|d| {
+                        span_err!(d, (*items[0]).span, E0535, "invalid argument");
+                    });
                     InlineAttr::None
                 }
             }
@@ -374,13 +397,13 @@ pub fn cfg_matches(cfgs: &[P<MetaItem>], cfg: &ast::MetaItem,
             mis.iter().all(|mi| cfg_matches(cfgs, &mi, sess, features)),
         ast::MetaItemKind::List(ref pred, ref mis) if &pred[..] == "not" => {
             if mis.len() != 1 {
-                sess.span_diagnostic.span_err(cfg.span, "expected 1 cfg-pattern");
+                span_err!(sess.span_diagnostic, cfg.span, E0536, "expected 1 cfg-pattern");
                 return false;
             }
             !cfg_matches(cfgs, &mis[0], sess, features)
         }
         ast::MetaItemKind::List(ref pred, _) => {
-            sess.span_diagnostic.span_err(cfg.span, &format!("invalid predicate `{}`", pred));
+            span_err!(sess.span_diagnostic, cfg.span, E0537, "invalid predicate `{}`", pred);
             false
         },
         ast::MetaItemKind::Word(_) | ast::MetaItemKind::NameValue(..) => {
@@ -446,15 +469,14 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
         if let Some(metas) = attr.meta_item_list() {
             let get = |meta: &MetaItem, item: &mut Option<InternedString>| {
                 if item.is_some() {
-                    diagnostic.span_err(meta.span, &format!("multiple '{}' items",
-                                                             meta.name()));
+                    handle_errors(diagnostic, meta.span, AttrError::MultipleItem(meta.name()));
                     return false
                 }
                 if let Some(v) = meta.value_str() {
                     *item = Some(v);
                     true
                 } else {
-                    diagnostic.span_err(meta.span, "incorrect meta item");
+                    span_err!(diagnostic, meta.span, E0539, "incorrect meta item");
                     false
                 }
             };
@@ -462,7 +484,8 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
             match tag {
                 "rustc_deprecated" => {
                     if rustc_depr.is_some() {
-                        diagnostic.span_err(item_sp, "multiple rustc_deprecated attributes");
+                        span_err!(diagnostic, item_sp, E0540,
+                                  "multiple rustc_deprecated attributes");
                         break
                     }
 
@@ -473,8 +496,8 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
                             "since" => if !get(meta, &mut since) { continue 'outer },
                             "reason" => if !get(meta, &mut reason) { continue 'outer },
                             _ => {
-                                diagnostic.span_err(meta.span, &format!("unknown meta item '{}'",
-                                                                        meta.name()));
+                                handle_errors(diagnostic, meta.span,
+                                              AttrError::UnknownMetaItem(meta.name()));
                                 continue 'outer
                             }
                         }
@@ -488,18 +511,18 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
                             })
                         }
                         (None, _) => {
-                            diagnostic.span_err(attr.span(), "missing 'since'");
+                            handle_errors(diagnostic, attr.span(), AttrError::MissingSince);
                             continue
                         }
                         _ => {
-                            diagnostic.span_err(attr.span(), "missing 'reason'");
+                            span_err!(diagnostic, attr.span(), E0543, "missing 'reason'");
                             continue
                         }
                     }
                 }
                 "unstable" => {
                     if stab.is_some() {
-                        diagnostic.span_err(item_sp, "multiple stability levels");
+                        handle_errors(diagnostic, attr.span(), AttrError::MultipleStabilityLevels);
                         break
                     }
 
@@ -512,8 +535,8 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
                             "reason" => if !get(meta, &mut reason) { continue 'outer },
                             "issue" => if !get(meta, &mut issue) { continue 'outer },
                             _ => {
-                                diagnostic.span_err(meta.span, &format!("unknown meta item '{}'",
-                                                                        meta.name()));
+                                handle_errors(diagnostic, meta.span,
+                                              AttrError::UnknownMetaItem(meta.name()));
                                 continue 'outer
                             }
                         }
@@ -528,7 +551,8 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
                                         if let Ok(issue) = issue.parse() {
                                             issue
                                         } else {
-                                            diagnostic.span_err(attr.span(), "incorrect 'issue'");
+                                            span_err!(diagnostic, attr.span(), E0545,
+                                                      "incorrect 'issue'");
                                             continue
                                         }
                                     }
@@ -538,18 +562,18 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
                             })
                         }
                         (None, _, _) => {
-                            diagnostic.span_err(attr.span(), "missing 'feature'");
+                            handle_errors(diagnostic, attr.span(), AttrError::MissingFeature);
                             continue
                         }
                         _ => {
-                            diagnostic.span_err(attr.span(), "missing 'issue'");
+                            span_err!(diagnostic, attr.span(), E0547, "missing 'issue'");
                             continue
                         }
                     }
                 }
                 "stable" => {
                     if stab.is_some() {
-                        diagnostic.span_err(item_sp, "multiple stability levels");
+                        handle_errors(diagnostic, attr.span(), AttrError::MultipleStabilityLevels);
                         break
                     }
 
@@ -560,8 +584,8 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
                             "feature" => if !get(meta, &mut feature) { continue 'outer },
                             "since" => if !get(meta, &mut since) { continue 'outer },
                             _ => {
-                                diagnostic.span_err(meta.span, &format!("unknown meta item '{}'",
-                                                                        meta.name()));
+                                handle_errors(diagnostic, meta.span,
+                                              AttrError::UnknownMetaItem(meta.name()));
                                 continue 'outer
                             }
                         }
@@ -578,11 +602,11 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
                             })
                         }
                         (None, _) => {
-                            diagnostic.span_err(attr.span(), "missing 'feature'");
+                            handle_errors(diagnostic, attr.span(), AttrError::MissingFeature);
                             continue
                         }
                         _ => {
-                            diagnostic.span_err(attr.span(), "missing 'since'");
+                            handle_errors(diagnostic, attr.span(), AttrError::MissingSince);
                             continue
                         }
                     }
@@ -590,7 +614,7 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
                 _ => unreachable!()
             }
         } else {
-            diagnostic.span_err(attr.span(), "incorrect stability attribute type");
+            span_err!(diagnostic, attr.span(), E0548, "incorrect stability attribute type");
             continue
         }
     }
@@ -603,7 +627,8 @@ fn find_stability_generic<'a, I>(diagnostic: &Handler,
             }
             stab.rustc_depr = Some(rustc_depr);
         } else {
-            diagnostic.span_err(item_sp, "rustc_deprecated attribute must be paired with \
+            span_err!(diagnostic, item_sp, E0549,
+                      "rustc_deprecated attribute must be paired with \
                        either stable or unstable attribute");
         }
     }
@@ -627,22 +652,21 @@ fn find_deprecation_generic<'a, I>(diagnostic: &Handler,
         mark_used(attr);
 
         if depr.is_some() {
-            diagnostic.span_err(item_sp, "multiple deprecated attributes");
+            span_err!(diagnostic, item_sp, E0550, "multiple deprecated attributes");
             break
         }
 
         depr = if let Some(metas) = attr.meta_item_list() {
             let get = |meta: &MetaItem, item: &mut Option<InternedString>| {
                 if item.is_some() {
-                    diagnostic.span_err(meta.span, &format!("multiple '{}' items",
-                                                             meta.name()));
+                    handle_errors(diagnostic, meta.span, AttrError::MultipleItem(meta.name()));
                     return false
                 }
                 if let Some(v) = meta.value_str() {
                     *item = Some(v);
                     true
                 } else {
-                    diagnostic.span_err(meta.span, "incorrect meta item");
+                    span_err!(diagnostic, meta.span, E0551, "incorrect meta item");
                     false
                 }
             };
@@ -654,8 +678,8 @@ fn find_deprecation_generic<'a, I>(diagnostic: &Handler,
                     "since" => if !get(meta, &mut since) { continue 'outer },
                     "note" => if !get(meta, &mut note) { continue 'outer },
                     _ => {
-                        diagnostic.span_err(meta.span, &format!("unknown meta item '{}'",
-                                                                meta.name()));
+                        handle_errors(diagnostic, meta.span,
+                                      AttrError::UnknownMetaItem(meta.name()));
                         continue 'outer
                     }
                 }
@@ -718,7 +742,7 @@ pub fn find_repr_attrs(diagnostic: &Handler, attr: &Attribute) -> Vec<ReprAttr>
                                 Some(ity) => Some(ReprInt(item.span, ity)),
                                 None => {
                                     // Not a word we recognize
-                                    diagnostic.span_err(item.span,
+                                    span_err!(diagnostic, item.span, E0552,
                                               "unrecognized representation hint");
                                     None
                                 }
@@ -731,7 +755,8 @@ pub fn find_repr_attrs(diagnostic: &Handler, attr: &Attribute) -> Vec<ReprAttr>
                         }
                     }
                     // Not a word:
-                    _ => diagnostic.span_err(item.span, "unrecognized enum representation hint")
+                    _ => span_err!(diagnostic, item.span, E0553,
+                                   "unrecognized enum representation hint"),
                 }
             }
         }

src/libsyntax/diagnostic_list.rs

@@ -0,0 +1,54 @@
+// 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.
+
+#![allow(non_snake_case)]
+
+// Error messages for EXXXX errors.
+// Each message should start and end with a new line, and be wrapped to 80 characters.
+// In vim you can `:set tw=80` and use `gq` to wrap paragraphs. Use `:set tw=0` to disable.
+register_long_diagnostics! {
+
+E0533: r##"
+```compile_fail,E0533
+#[export_name]
+pub fn something() {}
+
+fn main() {}
+```
+"##,
+
+}
+
+register_diagnostics! {
+    E0534, // expected one argument
+    E0535, // invalid argument
+    E0536, // expected 1 cfg-pattern
+    E0537, // invalid predicate
+    E0538, // multiple [same] items
+    E0539, // incorrect meta item
+    E0540, // multiple rustc_deprecated attributes
+    E0541, // unknown meta item
+    E0542, // missing 'since'
+    E0543, // missing 'reason'
+    E0544, // multiple stability levels
+    E0545, // incorrect 'issue'
+    E0546, // missing 'feature'
+    E0547, // missing 'issue'
+    E0548, // incorrect stability attribute type
+    E0549, // rustc_deprecated attribute must be paired with either stable or unstable attribute
+    E0550, // multiple deprecated attributes
+    E0551, // incorrect meta item
+    E0552, // unrecognized representation hint
+    E0553, // unrecognized enum representation hint
+    E0554, // #[feature] may not be used on the [] release channel
+    E0555, // malformed feature attribute, expected #![feature(...)]
+    E0556, // malformed feature, expected just one word
+    E0557, // feature has been removed
+}

src/libsyntax/feature_gate.rs

@@ -1103,17 +1103,16 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute]) -> F
 
         match attr.meta_item_list() {
             None => {
-                span_handler.span_err(attr.span, "malformed feature attribute, \
-                                                  expected #![feature(...)]");
+                span_err!(span_handler, attr.span, E0555,
+                          "malformed feature attribute, expected #![feature(...)]");
             }
             Some(list) => {
                 for mi in list {
                     let name = match mi.node {
                         ast::MetaItemKind::Word(ref word) => (*word).clone(),
                         _ => {
-                            span_handler.span_err(mi.span,
-                                                  "malformed feature, expected just \
-                                                   one word");
+                            span_err!(span_handler, mi.span, E0556,
+                                      "malformed feature, expected just one word");
                             continue
                         }
                     };
@@ -1123,7 +1122,7 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute]) -> F
                     }
                     else if let Some(&(_, _, _)) = REMOVED_FEATURES.iter()
                         .find(|& &(n, _, _)| name == n) {
-                        span_handler.span_err(mi.span, "feature has been removed");
+                        span_err!(span_handler, mi.span, E0557, "feature has been removed");
                     }
                     else if let Some(&(_, _, _)) = ACCEPTED_FEATURES.iter()
                         .find(|& &(n, _, _)| name == n) {
@@ -1179,9 +1178,9 @@ fn maybe_stage_features(span_handler: &Handler, krate: &ast::Crate,
         for attr in &krate.attrs {
             if attr.check_name("feature") {
                 let release_channel = option_env!("CFG_RELEASE_CHANNEL").unwrap_or("(unknown)");
-                let ref msg = format!("#[feature] may not be used on the {} release channel",
+                span_err!(span_handler, attr.span, E0554,
+                          "#[feature] may not be used on the {} release channel",
                           release_channel);
-                span_handler.span_err(attr.span, msg);
             }
         }
     }

src/libsyntax/lib.rs

@@ -33,6 +33,7 @@
 #![feature(str_escape)]
 #![feature(unicode)]
 #![feature(question_mark)]
+#![feature(rustc_diagnostic_macros)]
 
 extern crate serialize;
 extern crate term;
@@ -66,6 +67,18 @@ macro_rules! panictry {
     })
 }
 
+#[macro_use]
+pub mod diagnostics {
+    #[macro_use]
+    pub mod macros;
+    pub mod plugin;
+    pub mod metadata;
+}
+
+// NB: This module needs to be declared first so diagnostics are
+// registered before they are used.
+pub mod diagnostic_list;
+
 pub mod util {
     pub mod interner;
     pub mod lev_distance;
@@ -80,12 +93,6 @@ pub mod util {
     pub use self::thin_vec::ThinVec;
 }
 
-pub mod diagnostics {
-    pub mod macros;
-    pub mod plugin;
-    pub mod metadata;
-}
-
 pub mod json;
 
 pub mod syntax {
@@ -130,3 +137,5 @@ pub mod ext {
         pub mod macro_rules;
     }
 }
+
+// __build_diagnostic_array! { libsyntax, DIAGNOSTICS }

src/test/compile-fail/stability-attribute-sanity.rs

@@ -15,83 +15,84 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 
 mod bogus_attribute_types_1 {
-    #[stable(feature = "a", since = "a", reason)] //~ ERROR unknown meta item 'reason'
+    #[stable(feature = "a", since = "a", reason)] //~ ERROR unknown meta item 'reason' [E0541]
     fn f1() { }
 
-    #[stable(feature = "a", since)] //~ ERROR incorrect meta item
+    #[stable(feature = "a", since)] //~ ERROR incorrect meta item [E0539]
     fn f2() { }
 
-    #[stable(feature, since = "a")] //~ ERROR incorrect meta item
+    #[stable(feature, since = "a")] //~ ERROR incorrect meta item [E0539]
     fn f3() { }
 
-    #[stable(feature = "a", since(b))] //~ ERROR incorrect meta item
+    #[stable(feature = "a", since(b))] //~ ERROR incorrect meta item [E0539]
     fn f5() { }
 
-    #[stable(feature(b), since = "a")] //~ ERROR incorrect meta item
+    #[stable(feature(b), since = "a")] //~ ERROR incorrect meta item [E0539]
     fn f6() { }
 }
 
 mod bogus_attribute_types_2 {
-    #[unstable] //~ ERROR incorrect stability attribute type
+    #[unstable] //~ ERROR incorrect stability attribute type [E0548]
     fn f1() { }
 
-    #[unstable = "a"] //~ ERROR incorrect stability attribute type
+    #[unstable = "a"] //~ ERROR incorrect stability attribute type [E0548]
     fn f2() { }
 
-    #[stable] //~ ERROR incorrect stability attribute type
+    #[stable] //~ ERROR incorrect stability attribute type [E0548]
     fn f3() { }
 
-    #[stable = "a"] //~ ERROR incorrect stability attribute type
+    #[stable = "a"] //~ ERROR incorrect stability attribute type [E0548]
     fn f4() { }
 
     #[stable(feature = "a", since = "b")]
-    #[rustc_deprecated] //~ ERROR incorrect stability attribute type
+    #[rustc_deprecated] //~ ERROR incorrect stability attribute type [E0548]
     fn f5() { }
 
     #[stable(feature = "a", since = "b")]
-    #[rustc_deprecated = "a"] //~ ERROR incorrect stability attribute type
+    #[rustc_deprecated = "a"] //~ ERROR incorrect stability attribute type [E0548]
     fn f6() { }
 }
 
 mod missing_feature_names {
-    #[unstable(issue = "0")] //~ ERROR missing 'feature'
+    #[unstable(issue = "0")] //~ ERROR missing 'feature' [E0546]
     fn f1() { }
 
-    #[unstable(feature = "a")] //~ ERROR missing 'issue'
+    #[unstable(feature = "a")] //~ ERROR missing 'issue' [E0547]
     fn f2() { }
 
-    #[stable(since = "a")] //~ ERROR missing 'feature'
+    #[stable(since = "a")] //~ ERROR missing 'feature' [E0546]
     fn f3() { }
 }
 
 mod missing_version {
-    #[stable(feature = "a")] //~ ERROR missing 'since'
+    #[stable(feature = "a")] //~ ERROR missing 'since' [E0542]
     fn f1() { }
 
     #[stable(feature = "a", since = "b")]
-    #[rustc_deprecated(reason = "a")] //~ ERROR missing 'since'
+    #[rustc_deprecated(reason = "a")] //~ ERROR missing 'since' [E0542]
     fn f2() { }
 }
 
 #[unstable(feature = "a", issue = "0")]
-#[stable(feature = "a", since = "b")]
-fn multiple1() { } //~ ERROR multiple stability levels
+#[stable(feature = "a", since = "b")] //~ ERROR multiple stability levels [E0544]
+fn multiple1() { }
 
 #[unstable(feature = "a", issue = "0")]
-#[unstable(feature = "a", issue = "0")]
-fn multiple2() { } //~ ERROR multiple stability levels
+#[unstable(feature = "a", issue = "0")] //~ ERROR multiple stability levels [E0544]
+fn multiple2() { }
 
 #[stable(feature = "a", since = "b")]
-#[stable(feature = "a", since = "b")]
-fn multiple3() { } //~ ERROR multiple stability levels
+#[stable(feature = "a", since = "b")] //~ ERROR multiple stability levels [E0544]
+fn multiple3() { }
 
 #[stable(feature = "a", since = "b")]
 #[rustc_deprecated(since = "b", reason = "text")]
 #[rustc_deprecated(since = "b", reason = "text")]
-fn multiple4() { } //~ ERROR multiple rustc_deprecated attributes
+fn multiple4() { } //~ ERROR multiple rustc_deprecated attributes [E0540]
 //~^ ERROR Invalid stability or deprecation version found
 
 #[rustc_deprecated(since = "a", reason = "text")]
-fn deprecated_without_unstable_or_stable() { } //~ ERROR rustc_deprecated attribute must be paired
+fn deprecated_without_unstable_or_stable() { }
+//~^ ERROR rustc_deprecated attribute must be paired with either stable or unstable attribute
 
 fn main() { }

src/tools/compiletest/src/runtest.rs

@@ -1012,8 +1012,7 @@ actual:\n\
 
         // Parse the JSON output from the compiler and extract out the messages.
         let actual_errors = json::parse_output(&file_name, &proc_res.stderr, &proc_res);
-        let mut unexpected = 0;
-        let mut not_found = 0;
+        let mut unexpected = Vec::new();
         let mut found = vec![false; expected_errors.len()];
         for actual_error in &actual_errors {
             let opt_index =
@@ -1045,12 +1044,13 @@ actual:\n\
                                      .map_or(String::from("message"),
                                              |k| k.to_string()),
                                      actual_error.msg));
-                        unexpected += 1;
+                        unexpected.push(actual_error.clone());
                     }
                 }
             }
         }
 
+        let mut not_found = Vec::new();
         // anything not yet found is a problem
         for (index, expected_error) in expected_errors.iter().enumerate() {
             if !found[index] {
@@ -1062,18 +1062,22 @@ actual:\n\
                              .map_or("message".into(),
                                      |k| k.to_string()),
                              expected_error.msg));
-                not_found += 1;
+                not_found.push(expected_error.clone());
             }
         }
 
-        if unexpected > 0 || not_found > 0 {
+        if unexpected.len() > 0 || not_found.len() > 0 {
             self.error(
                 &format!("{} unexpected errors found, {} expected errors not found",
-                         unexpected, not_found));
+                         unexpected.len(), not_found.len()));
             print!("status: {}\ncommand: {}\n",
                    proc_res.status, proc_res.cmdline);
-            println!("actual errors (from JSON output): {:#?}\n", actual_errors);
-            println!("expected errors (from test file): {:#?}\n", expected_errors);
+            if unexpected.len() > 0 {
+                println!("unexpected errors (from JSON output): {:#?}\n", unexpected);
+            }
+            if not_found.len() > 0 {
+                println!("not found errors (from test file): {:#?}\n", not_found);
+            }
             panic!();
         }
     }

src/tools/linkchecker/main.rs

@@ -138,22 +138,6 @@ fn check(cache: &mut Cache,
         return None;
     }
 
-    if file.ends_with("std/sys/ext/index.html") {
-        return None;
-    }
-
-    if let Some(file) = file.to_str() {
-        // FIXME(#31948)
-        if file.contains("ParseFloatError") {
-            return None;
-        }
-        // weird reexports, but this module is on its way out, so chalk it up to
-        // "rustdoc weirdness" and move on from there
-        if file.contains("scoped_tls") {
-            return None;
-        }
-    }
-
     let mut parser = UrlParser::new();
     parser.base_url(base);
 
@@ -170,12 +154,24 @@ fn check(cache: &mut Cache,
 
     // Search for anything that's the regex 'href[ ]*=[ ]*".*?"'
     with_attrs_in_source(&contents, " href", |url, i| {
+        // Ignore external URLs
+        if url.starts_with("http:") || url.starts_with("https:") ||
+           url.starts_with("javascript:") || url.starts_with("ftp:") ||
+           url.starts_with("irc:") || url.starts_with("data:") {
+            return;
+        }
         // Once we've plucked out the URL, parse it using our base url and
-        // then try to extract a file path. If either of these fail then we
-        // just keep going.
+        // then try to extract a file path.
         let (parsed_url, path) = match url_to_file_path(&parser, url) {
             Some((url, path)) => (url, PathBuf::from(path)),
-            None => return,
+            None => {
+                *errors = true;
+                println!("{}:{}: invalid link - {}",
+                         pretty_file.display(),
+                         i + 1,
+                         url);
+                return;
+            }
         };
 
         // Alright, if we've found a file name then this file had better
@@ -197,7 +193,8 @@ fn check(cache: &mut Cache,
                 Ok(res) => res,
                 Err(LoadError::IOError(err)) => panic!(format!("{}", err)),
                 Err(LoadError::BrokenRedirect(target, _)) => {
-                    print!("{}:{}: broken redirect to {}",
+                    *errors = true;
+                    println!("{}:{}: broken redirect to {}",
                              pretty_file.display(),
                              i + 1,
                              target.display());