Rollup of 9 pull requests

.gitmodules

@@ -25,4 +25,4 @@
 	url = https://github.com/rust-lang-nursery/reference.git
 [submodule "book"]
 	path = src/doc/book
-	url = https://github.com/rust-lang/book
+	url = https://github.com/rust-lang/book.git

appveyor.yml

@@ -141,15 +141,18 @@ install:
   - set SCCACHE_ERROR_LOG=%CD%/sccache.log
 
 test_script:
-  - appveyor-retry sh -c 'git submodule deinit -f . && git submodule update --init'
+  - if not exist C:\cache\rustsrc\NUL mkdir C:\cache\rustsrc
+  - sh src/ci/init_repo.sh . /c/cache/rustsrc
   - set SRC=.
   - set NO_CCACHE=1
   - sh src/ci/run.sh
 
 on_failure:
-  - cat %CD%/sccache.log
+  - cat %CD%\sccache.log
+  - cat C:\Users\appveyor\AppData\Local\Temp\1\build-cache-logs\*.log
 
 cache:
+  - C:\cache\rustsrc
   - "build/i686-pc-windows-msvc/llvm -> src/rustllvm/llvm-rebuild-trigger"
   - "build/x86_64-pc-windows-msvc/llvm -> src/rustllvm/llvm-rebuild-trigger"
   - "i686-pc-windows-msvc/llvm -> src/rustllvm/llvm-rebuild-trigger"

src/bootstrap/dist.rs

@@ -433,29 +433,32 @@ pub fn rust_src(build: &Build) {
         copy(&build.src.join(item), &dst_src.join(item));
     }
 
-    // Get cargo-vendor installed, if it isn't already.
-    let mut has_cargo_vendor = false;
-    let mut cmd = Command::new(&build.cargo);
-    for line in output(cmd.arg("install").arg("--list")).lines() {
-        has_cargo_vendor |= line.starts_with("cargo-vendor ");
-    }
-    if !has_cargo_vendor {
+    // If we're building from git sources, we need to vendor a complete distribution.
+    if build.src_is_git {
+        // Get cargo-vendor installed, if it isn't already.
+        let mut has_cargo_vendor = false;
+        let mut cmd = Command::new(&build.cargo);
+        for line in output(cmd.arg("install").arg("--list")).lines() {
+            has_cargo_vendor |= line.starts_with("cargo-vendor ");
+        }
+        if !has_cargo_vendor {
+            let mut cmd = Command::new(&build.cargo);
+            cmd.arg("install")
+               .arg("--force")
+               .arg("--debug")
+               .arg("--vers").arg(CARGO_VENDOR_VERSION)
+               .arg("cargo-vendor")
+               .env("RUSTC", &build.rustc);
+            build.run(&mut cmd);
+        }
+
+        // Vendor all Cargo dependencies
         let mut cmd = Command::new(&build.cargo);
-        cmd.arg("install")
-           .arg("--force")
-           .arg("--debug")
-           .arg("--vers").arg(CARGO_VENDOR_VERSION)
-           .arg("cargo-vendor")
-           .env("RUSTC", &build.rustc);
+        cmd.arg("vendor")
+           .current_dir(&dst_src.join("src"));
         build.run(&mut cmd);
     }
 
-    // Vendor all Cargo dependencies
-    let mut cmd = Command::new(&build.cargo);
-    cmd.arg("vendor")
-       .current_dir(&dst_src.join("src"));
-    build.run(&mut cmd);
-
     // Create source tarball in rust-installer format
     let mut cmd = Command::new(SH_CMD);
     cmd.arg(sanitize_sh(&build.src.join("src/rust-installer/gen-installer.sh")))

src/bootstrap/lib.rs

@@ -162,6 +162,7 @@ pub struct Build {
     cxx: HashMap<String, gcc::Tool>,
     crates: HashMap<String, Crate>,
     is_sudo: bool,
+    src_is_git: bool,
 }
 
 #[derive(Debug)]
@@ -233,6 +234,7 @@ impl Build {
         };
         let rust_info = channel::GitInfo::new(&src);
         let cargo_info = channel::GitInfo::new(&src.join("cargo"));
+        let src_is_git = src.join(".git").exists();
 
         Build {
             flags: flags,
@@ -251,6 +253,7 @@ impl Build {
             lldb_version: None,
             lldb_python_dir: None,
             is_sudo: is_sudo,
+            src_is_git: src_is_git,
         }
     }
 
@@ -307,10 +310,7 @@ impl Build {
             OutOfSync,
         }
 
-        if !self.config.submodules {
-            return
-        }
-        if fs::metadata(self.src.join(".git")).is_err() {
+        if !self.src_is_git || !self.config.submodules {
             return
         }
         let git = || {

src/bootstrap/sanity.rs

@@ -65,7 +65,7 @@ pub fn check(build: &mut Build) {
 
     // If we've got a git directory we're gona need git to update
     // submodules and learn about various other aspects.
-    if fs::metadata(build.src.join(".git")).is_ok() {
+    if build.src_is_git {
         need_cmd("git".as_ref());
     }
 

src/ci/docker/README.md

@@ -152,18 +152,13 @@ For targets: `powerpc-unknown-linux-gnu`
 - Path and misc options > Patches origin = Bundled, then local
 - Path and misc options > Local patch directory = /tmp/patches
 - Target options > Target Architecture = powerpc
-- Target options > Emit assembly for CPU = power4 -- (+)
-- Target options > Tune for CPU = power6 -- (+)
+- Target options > Emit assembly for CPU = powerpc -- pure 32-bit PowerPC
 - Operating System > Target OS = linux
 - Operating System > Linux kernel version = 2.6.32.68 -- ~RHEL6 kernel
 - C-library > glibc version = 2.12.2 -- ~RHEL6 glibc
 - C compiler > gcc version = 4.9.3
-- C compiler > Core gcc extra config = --with-cpu-32=power4 --with-cpu=default32 -- (+)
-- C compiler > gcc extra config = --with-cpu-32=power4 --with-cpu=default32 -- (+)
 - C compiler > C++ = ENABLE -- to cross compile LLVM
 
-(+) These CPU options match the configuration of the toolchains in RHEL6.
-
 ## `powerpc64-linux-gnu.config`
 
 For targets: `powerpc64-unknown-linux-gnu`

src/ci/docker/dist-i586-gnu-i686-musl/build-musl.sh

@@ -15,11 +15,14 @@ set -ex
 export CFLAGS="-fPIC -Wa,-mrelax-relocations=no"
 export CXXFLAGS="-Wa,-mrelax-relocations=no"
 
-MUSL=musl-1.1.14
+MUSL=musl-1.1.16
 curl https://www.musl-libc.org/releases/$MUSL.tar.gz | tar xzf -
 cd $MUSL
-CFLAGS="$CFLAGS -m32" ./configure --prefix=/musl-i686 --disable-shared --target=i686
-make -j10
+CC=gcc \
+  CFLAGS="$CFLAGS -m32" \
+  ./configure --prefix=/musl-i686 --disable-shared \
+    --target=i686
+make AR=ar RANLIB=ranlib -j10
 make install
 cd ..
 

src/ci/docker/dist-powerpc-linux/powerpc-linux-gnu.config

@@ -101,8 +101,8 @@ CT_ARCH_SUPPORTS_WITH_FLOAT=y
 CT_ARCH_DEFAULT_BE=y
 CT_ARCH_DEFAULT_32=y
 CT_ARCH_ABI=""
-CT_ARCH_CPU="power4"
-CT_ARCH_TUNE="power6"
+CT_ARCH_CPU="powerpc"
+CT_ARCH_TUNE=""
 CT_ARCH_BE=y
 # CT_ARCH_LE is not set
 CT_ARCH_32=y
@@ -391,8 +391,8 @@ CT_CC_GCC_HAS_LIBSANITIZER=y
 CT_CC_GCC_VERSION="4.9.3"
 # CT_CC_LANG_FORTRAN is not set
 CT_CC_GCC_ENABLE_CXX_FLAGS=""
-CT_CC_GCC_CORE_EXTRA_CONFIG_ARRAY="--with-cpu-32=power4 --with-cpu=default32"
-CT_CC_GCC_EXTRA_CONFIG_ARRAY="--with-cpu-32=power4 --with-cpu=default32"
+CT_CC_GCC_CORE_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_EXTRA_CONFIG_ARRAY=""
 CT_CC_GCC_EXTRA_ENV_ARRAY=""
 CT_CC_GCC_STATIC_LIBSTDCXX=y
 # CT_CC_GCC_SYSTEM_ZLIB is not set

src/ci/docker/dist-x86_64-musl/build-musl.sh

@@ -15,7 +15,7 @@ set -ex
 export CFLAGS="-fPIC -Wa,-mrelax-relocations=no"
 export CXXFLAGS="-Wa,-mrelax-relocations=no"
 
-MUSL=musl-1.1.14
+MUSL=musl-1.1.16
 curl https://www.musl-libc.org/releases/$MUSL.tar.gz | tar xzf -
 cd $MUSL
 ./configure --prefix=/musl-x86_64 --disable-shared

src/ci/init_repo.sh

@@ -38,9 +38,20 @@ fi
 
 # Wipe the cache if it's not valid, or mark it as invalid while we update it
 if [ ! -f "$cache_valid_file" ]; then
-    rm -rf "$CACHE_DIR" && mkdir "$CACHE_DIR"
+    rm -rf "$CACHE_DIR"
+    mkdir "$CACHE_DIR"
 else
-    rm "$cache_valid_file"
+    stat_lines=$(cd "$cache_src_dir" && git status --porcelain | wc -l)
+    stat_ec=$(cd "$cache_src_dir" && git status >/dev/null 2>&1 && echo $?)
+    if [ ! -d "$cache_src_dir/.git" -o $stat_lines != 0 -o $stat_ec != 0 ]; then
+        # Something is badly wrong - the cache valid file is here, but something
+        # about the git repo is fishy. Nuke it all, just in case
+        echo "WARNING: $cache_valid_file exists but bad repo: l:$stat_lines, ec:$stat_ec"
+        rm -rf "$CACHE_DIR"
+        mkdir "$CACHE_DIR"
+    else
+        rm "$cache_valid_file"
+    fi
 fi
 
 # Update the cache (a pristine copy of the rust source master)

src/doc/unstable-book/src/SUMMARY.md

@@ -81,6 +81,7 @@
 - [future_atomic_orderings](future-atomic-orderings.md)
 - [generic_param_attrs](generic-param-attrs.md)
 - [get_type_id](get-type-id.md)
+- [global_asm](global_asm.md)
 - [heap_api](heap-api.md)
 - [i128](i128.md)
 - [i128_type](i128-type.md)

src/doc/unstable-book/src/asm.md

@@ -189,3 +189,5 @@ constraints, etc.
 
 [llvm-docs]: http://llvm.org/docs/LangRef.html#inline-assembler-expressions
 
+If you need more power and don't mind losing some of the niceties of
+`asm!`, check out [global_asm](global_asm.html).

src/doc/unstable-book/src/global_asm.md

@@ -0,0 +1,78 @@
+# `global_asm`
+
+The tracking issue for this feature is: [#35119]
+
+[#35119]: https://github.com/rust-lang/rust/issues/35119
+
+------------------------
+
+The `global_asm!` macro allows the programmer to write arbitrary
+assembly outside the scope of a function body, passing it through
+`rustc` and `llvm` to the assembler. The macro is a no-frills
+interface to LLVM's concept of [module-level inline assembly]. That is,
+all caveats applicable to LLVM's module-level inline assembly apply
+to `global_asm!`.
+
+[module-level inline assembly]: http://llvm.org/docs/LangRef.html#module-level-inline-assembly
+
+`global_asm!` fills a role not currently satisfied by either `asm!`
+or `#[naked]` functions. The programmer has _all_ features of the
+assembler at their disposal. The linker will expect to resolve any
+symbols defined in the inline assembly, modulo any symbols marked as
+external. It also means syntax for directives and assembly follow the
+conventions of the assembler in your toolchain.
+
+A simple usage looks like this:
+
+```rust,ignore
+# #![feature(global_asm)]
+# you also need relevant target_arch cfgs
+global_asm!(include_str!("something_neato.s"));
+```
+
+And a more complicated usage looks like this:
+
+```rust,ignore
+# #![feature(global_asm)]
+# #![cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+
+pub mod sally {
+    global_asm!(r#"
+        .global foo
+      foo:
+        jmp baz
+    "#);
+
+    #[no_mangle]
+    pub unsafe extern "C" fn baz() {}
+}
+
+// the symbols `foo` and `bar` are global, no matter where
+// `global_asm!` was used.
+extern "C" {
+    fn foo();
+    fn bar();
+}
+
+pub mod harry {
+    global_asm!(r#"
+        .global bar
+      bar:
+        jmp quux
+    "#);
+
+    #[no_mangle]
+    pub unsafe extern "C" fn quux() {}
+}
+```
+
+You may use `global_asm!` multiple times, anywhere in your crate, in
+whatever way suits you. The effect is as if you concatenated all
+usages and placed the larger, single usage in the crate root.
+
+------------------------
+
+If you don't need quite as much power and flexibility as
+`global_asm!` provides, and you don't mind restricting your inline
+assembly to `fn` bodies only, you might try the [asm](asm.html)
+feature instead.

src/libcollections/vec.rs

@@ -1346,7 +1346,7 @@ impl<T: PartialEq> Vec<T> {
     /// # Examples
     ///
     /// ```
-    ///# #![feature(vec_remove_item)]
+    /// # #![feature(vec_remove_item)]
     /// let mut vec = vec![1, 2, 3, 1];
     ///
     /// vec.remove_item(&1);

src/libcore/sync/atomic.rs

@@ -153,8 +153,9 @@ unsafe impl<T> Sync for AtomicPtr<T> {}
 /// Rust's memory orderings are [the same as
 /// LLVM's](http://llvm.org/docs/LangRef.html#memory-model-for-concurrent-operations).
 ///
-/// For more information see the [nomicon][1].
-/// [1]: ../../../nomicon/atomics.html
+/// For more information see the [nomicon].
+///
+/// [nomicon]: ../../../nomicon/atomics.html
 #[stable(feature = "rust1", since = "1.0.0")]
 #[derive(Copy, Clone, Debug)]
 pub enum Ordering {

src/librustc/hir/def.rs

@@ -57,6 +57,8 @@ pub enum Def {
     // Macro namespace
     Macro(DefId, MacroKind),
 
+    GlobalAsm(DefId),
+
     // Both namespaces
     Err,
 }
@@ -144,7 +146,8 @@ impl Def {
             Def::Variant(id) | Def::VariantCtor(id, ..) | Def::Enum(id) | Def::TyAlias(id) |
             Def::AssociatedTy(id) | Def::TyParam(id) | Def::Struct(id) | Def::StructCtor(id, ..) |
             Def::Union(id) | Def::Trait(id) | Def::Method(id) | Def::Const(id) |
-            Def::AssociatedConst(id) | Def::Local(id) | Def::Upvar(id, ..) | Def::Macro(id, ..) => {
+            Def::AssociatedConst(id) | Def::Local(id) | Def::Upvar(id, ..) | Def::Macro(id, ..) |
+            Def::GlobalAsm(id) => {
                 id
             }
 
@@ -185,6 +188,7 @@ impl Def {
             Def::Label(..) => "label",
             Def::SelfTy(..) => "self type",
             Def::Macro(..) => "macro",
+            Def::GlobalAsm(..) => "global asm",
             Def::Err => "unresolved item",
         }
     }

src/librustc/hir/intravisit.rs

@@ -474,6 +474,9 @@ pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item) {
             visitor.visit_id(item.id);
             walk_list!(visitor, visit_foreign_item, &foreign_module.items);
         }
+        ItemGlobalAsm(_) => {
+            visitor.visit_id(item.id);
+        }
         ItemTy(ref typ, ref type_parameters) => {
             visitor.visit_id(item.id);
             visitor.visit_ty(typ);

src/librustc/hir/lowering.rs

@@ -645,6 +645,13 @@ impl<'a> LoweringContext<'a> {
         }
     }
 
+    fn lower_global_asm(&mut self, ga: &GlobalAsm) -> P<hir::GlobalAsm> {
+        P(hir::GlobalAsm {
+            asm: ga.asm,
+            ctxt: ga.ctxt,
+        })
+    }
+
     fn lower_variant(&mut self, v: &Variant) -> hir::Variant {
         Spanned {
             node: hir::Variant_ {
@@ -1287,6 +1294,7 @@ impl<'a> LoweringContext<'a> {
             }
             ItemKind::Mod(ref m) => hir::ItemMod(self.lower_mod(m)),
             ItemKind::ForeignMod(ref nm) => hir::ItemForeignMod(self.lower_foreign_mod(nm)),
+            ItemKind::GlobalAsm(ref ga) => hir::ItemGlobalAsm(self.lower_global_asm(ga)),
             ItemKind::Ty(ref t, ref generics) => {
                 hir::ItemTy(self.lower_ty(t), self.lower_generics(generics))
             }

src/librustc/hir/map/def_collector.rs

@@ -120,6 +120,7 @@ impl<'a> visit::Visitor<'a> for DefCollector<'a> {
                 DefPathData::ValueNs(i.ident.name.as_str()),
             ItemKind::MacroDef(..) => DefPathData::MacroDef(i.ident.name.as_str()),
             ItemKind::Mac(..) => return self.visit_macro_invoc(i.id, false),
+            ItemKind::GlobalAsm(..) => DefPathData::Misc,
             ItemKind::Use(ref view_path) => {
                 match view_path.node {
                     ViewPathGlob(..) => {}