---

yaml
---
r: 278125
b: refs/heads/auto
c: 1ec2217
h: refs/heads/master
i:
  278123: 264600e

Author: bors

[refs]

@@ -8,7 +8,7 @@ refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503
 refs/tags/release-0.3.1: 495bae036dfe5ec6ceafd3312b4dca48741e845b
 refs/tags/release-0.4: e828ea2080499553b97dfe33b3f4d472b4562ad7
 refs/tags/release-0.5: 7e3bcfbf21278251ee936ad53e92e9b719702d73
-refs/heads/auto: 3b0e27cc74d61e229aeaf0a710d3a018f7104ffc
+refs/heads/auto: 1ec22171e6053c640293067418ea1901cb1c7df1
 refs/tags/release-0.6: b4ebcfa1812664df5e142f0134a5faea3918544c
 refs/tags/0.1: b19db808c2793fe2976759b85a355c3ad8c8b336
 refs/tags/0.2: 1754d02027f2924bed83b0160ee340c7f41d5ea1

branches/auto/mk/ctags.mk

@@ -15,14 +15,21 @@
 
 .PHONY: TAGS.emacs TAGS.vi
 
-CTAGS_LOCATIONS=$(wildcard ${CFG_SRC_DIR}src/lib*)
+CTAGS_RUSTC_LOCATIONS=$(patsubst ${CFG_SRC_DIR}src/lib%test,, \
+				$(wildcard ${CFG_SRC_DIR}src/lib*)) ${CFG_SRC_DIR}src/libtest
 CTAGS_LOCATIONS=$(patsubst ${CFG_SRC_DIR}src/librust%,, \
                 $(patsubst ${CFG_SRC_DIR}src/lib%test,, \
 				$(wildcard ${CFG_SRC_DIR}src/lib*))) ${CFG_SRC_DIR}src/libtest
-CTAGS_OPTS=--options="${CFG_SRC_DIR}src/etc/ctags.rust" --languages=Rust --recurse ${CTAGS_LOCATIONS}
+CTAGS_OPTS=--options="${CFG_SRC_DIR}src/etc/ctags.rust" --languages=Rust --recurse
+
+TAGS.rustc.emacs:
+	ctags -e -f $@ ${CTAGS_OPTS} ${CTAGS_RUSTC_LOCATIONS}
 
 TAGS.emacs:
-	ctags -e -f $@ ${CTAGS_OPTS}
+	ctags -e -f $@ ${CTAGS_OPTS} ${CTAGS_LOCATIONS}
+
+TAGS.rustc.vi:
+	ctags -f $@ ${CTAGS_OPTS} ${CTAGS_RUSTC_LOCATIONS}
 
 TAGS.vi:
-	ctags -f $@ ${CTAGS_OPTS}
+	ctags -f $@ ${CTAGS_OPTS} ${CTAGS_LOCATIONS}

branches/auto/mk/platform.mk

@@ -169,7 +169,7 @@ ifdef CFG_CCACHE_BASEDIR
   export CCACHE_BASEDIR
 endif
 
-FIND_COMPILER = $(word 1,$(1:ccache=))
+FIND_COMPILER = $(strip $(1:ccache=))
 
 define CFG_MAKE_TOOLCHAIN
   # Prepend the tools with their prefix if cross compiling
@@ -187,7 +187,7 @@ define CFG_MAKE_TOOLCHAIN
     endif
   endif
 
-  CFG_COMPILE_C_$(1) = '$$(CC_$(1))' \
+  CFG_COMPILE_C_$(1) = '$$(call FIND_COMPILER,$$(CC_$(1)))' \
         $$(CFLAGS) \
         $$(CFG_GCCISH_CFLAGS) \
         $$(CFG_GCCISH_CFLAGS_$(1)) \
@@ -198,7 +198,7 @@ define CFG_MAKE_TOOLCHAIN
         $$(CFG_GCCISH_LINK_FLAGS_$(1)) \
         $$(CFG_GCCISH_DEF_FLAG_$(1))$$(3) $$(2) \
         $$(call CFG_INSTALL_NAME_$(1),$$(4))
-  CFG_COMPILE_CXX_$(1) = '$$(CXX_$(1))' \
+  CFG_COMPILE_CXX_$(1) = '$$(call FIND_COMPILER,$$(CXX_$(1)))' \
         $$(CXXFLAGS) \
         $$(CFG_GCCISH_CFLAGS) \
         $$(CFG_GCCISH_CXXFLAGS) \

branches/auto/mk/tests.mk

@@ -635,8 +635,8 @@ CTEST_COMMON_ARGS$(1)-T-$(2)-H-$(3) = \
         --host-rustcflags "$(RUSTC_FLAGS_$(3)) $$(CTEST_RUSTC_FLAGS) -L $$(RT_OUTPUT_DIR_$(3))" \
         --lldb-python-dir=$(CFG_LLDB_PYTHON_DIR) \
         --target-rustcflags "$(RUSTC_FLAGS_$(2)) $$(CTEST_RUSTC_FLAGS) -L $$(RT_OUTPUT_DIR_$(2))" \
-	--cc '$$(CC_$(2))' \
-	--cxx '$$(CXX_$(2))' \
+	--cc '$$(call FIND_COMPILER,$$(CC_$(2)))' \
+	--cxx '$$(call FIND_COMPILER,$$(CXX_$(2)))' \
 	--cflags "$$(CFG_GCCISH_CFLAGS_$(2))" \
 	--llvm-components "$$(LLVM_ALL_COMPONENTS_$(2))" \
 	--llvm-cxxflags "$$(LLVM_CXXFLAGS_$(2))" \

branches/auto/src/bootstrap/build/job.rs

@@ -54,7 +54,7 @@ pub unsafe fn setup() {
 
     // Indicate that when all handles to the job object are gone that all
     // process in the object should be killed. Note that this includes our
-    // entire process tree by default because we've added ourselves and and our
+    // entire process tree by default because we've added ourselves and our
     // children will reside in the job by default.
     let mut info = mem::zeroed::<JOBOBJECT_EXTENDED_LIMIT_INFORMATION>();
     info.BasicLimitInformation.LimitFlags = JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE;

branches/auto/src/doc/reference.md

@@ -2063,33 +2063,41 @@ arbitrarily complex configurations through nesting.
 
 The following configurations must be defined by the implementation:
 
-* `debug_assertions` - Enabled by default when compiling without optimizations.
-  This can be used to enable extra debugging code in development but not in
-  production.  For example, it controls the behavior of the standard library's
-  `debug_assert!` macro.
-* `target_arch = "..."` - Target CPU architecture, such as `"x86"`, `"x86_64"`
-  `"mips"`, `"powerpc"`, `"powerpc64"`, `"arm"`, or `"aarch64"`.
-* `target_endian = "..."` - Endianness of the target CPU, either `"little"` or
-  `"big"`.
-* `target_env = ".."` - An option provided by the compiler by default
-  describing the runtime environment of the target platform. Some examples of
-  this are `musl` for builds targeting the MUSL libc implementation, `msvc` for
-  Windows builds targeting MSVC, and `gnu` frequently the rest of the time. This
-  option may also be blank on some platforms.
+* `target_arch = "..."` - Target CPU architecture, such as `"x86"`,
+  `"x86_64"` `"mips"`, `"powerpc"`, `"powerpc64"`, `"arm"`, or
+  `"aarch64"`. This value is closely related to the first element of
+  the platform target triple, though it is not identical.
+* `target_os = "..."` - Operating system of the target, examples
+  include `"windows"`, `"macos"`, `"ios"`, `"linux"`, `"android"`,
+  `"freebsd"`, `"dragonfly"`, `"bitrig"` , `"openbsd"` or
+  `"netbsd"`. This value is closely related to the second and third
+  element of the platform target triple, though it is not identical.
 * `target_family = "..."` - Operating system family of the target, e. g.
   `"unix"` or `"windows"`. The value of this configuration option is defined
   as a configuration itself, like `unix` or `windows`.
-* `target_os = "..."` - Operating system of the target, examples include
-  `"windows"`, `"macos"`, `"ios"`, `"linux"`, `"android"`, `"freebsd"`, `"dragonfly"`,
-  `"bitrig"` , `"openbsd"` or `"netbsd"`.
+* `unix` - See `target_family`.
+* `windows` - See `target_family`.
+* `target_env = ".."` - Further disambiguates the target platform with
+  information about the ABI/libc. Presently this value is either
+  `"gnu"`, `"msvc"`, `"musl"`, or the empty string. For historical
+  reasons this value has only been defined as non-empty when needed
+  for disambiguation. Thus on many GNU platforms this value will be
+  empty. This value is closely related to the fourth element of the
+  platform target triple, though it is not identical. For example,
+  embedded ABIs such as `gnueabihf` will simply define `target_env` as
+  `"gnu"`.
+* `target_endian = "..."` - Endianness of the target CPU, either `"little"` or
+  `"big"`.
 * `target_pointer_width = "..."` - Target pointer width in bits. This is set
   to `"32"` for targets with 32-bit pointers, and likewise set to `"64"` for
   64-bit pointers.
 * `target_vendor = "..."` - Vendor of the target, for example `apple`, `pc`, or
   simply `"unknown"`.
 * `test` - Enabled when compiling the test harness (using the `--test` flag).
-* `unix` - See `target_family`.
-* `windows` - See `target_family`.
+* `debug_assertions` - Enabled by default when compiling without optimizations.
+  This can be used to enable extra debugging code in development but not in
+  production.  For example, it controls the behavior of the standard library's
+  `debug_assert!` macro.
 
 You can also set another attribute based on a `cfg` variable with `cfg_attr`:
 

branches/auto/src/libcollections/slice.rs

@@ -419,8 +419,8 @@ impl<T> [T] {
     ///
     /// ```rust
     /// let v = &[1, 2, 3, 4, 5];
-    /// for win in v.chunks(2) {
-    ///     println!("{:?}", win);
+    /// for chunk in v.chunks(2) {
+    ///     println!("{:?}", chunk);
     /// }
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]

branches/auto/src/libcore/iter/iterator.rs

@@ -214,7 +214,7 @@ pub trait Iterator {
     /// Like most indexing operations, the count starts from zero, so `nth(0)`
     /// returns the first value, `nth(1)` the second, and so on.
     ///
-    /// `nth()` will return `None` if `n` is larger than the length of the
+    /// `nth()` will return `None` if `n` is greater than or equal to the length of the
     /// iterator.
     ///
     /// # Examples
@@ -237,7 +237,7 @@ pub trait Iterator {
     /// assert_eq!(iter.nth(1), None);
     /// ```
     ///
-    /// Returning `None` if there are less than `n` elements:
+    /// Returning `None` if there are less than `n + 1` elements:
     ///
     /// ```
     /// let a = [1, 2, 3];

branches/auto/src/libcore/num/mod.rs

@@ -37,6 +37,17 @@ use slice::SliceExt;
 /// `wrapping_add`, or through the `Wrapping<T>` type, which says that
 /// all standard arithmetic operations on the underlying value are
 /// intended to have wrapping semantics.
+///
+/// # Examples
+///
+/// ```
+/// use std::num::Wrapping;
+///
+/// let zero = Wrapping(0u32);
+/// let one = Wrapping(1u32);
+///
+/// assert_eq!(std::u32::MAX, (zero - one).0);
+/// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 #[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Default, Hash)]
 pub struct Wrapping<T>(#[stable(feature = "rust1", since = "1.0.0")] pub T);

branches/auto/src/librustc/dep_graph/thread.rs

@@ -176,6 +176,9 @@ pub fn main(swap_in: Receiver<Vec<DepMessage>>,
                 DepMessage::Query => query_out.send(edges.query()).unwrap(),
             }
         }
-        swap_out.send(messages).unwrap();
+        if let Err(_) = swap_out.send(messages) {
+            // the receiver must have been dropped already
+            break;
+        }
     }
 }

branches/auto/src/librustc/session/config.rs

@@ -1355,7 +1355,7 @@ pub mod nightly_options {
                     early_error(ErrorOutputType::default(), &msg);
                 }
                 OptionStability::UnstableButNotReally => {
-                    let msg = format!("the option `{}` is is unstable and should \
+                    let msg = format!("the option `{}` is unstable and should \
                                        only be used on the nightly compiler, but \
                                        it is currently accepted for backwards \
                                        compatibility; this will soon change, \

branches/auto/src/librustc/traits/project.rs

@@ -40,7 +40,7 @@ use std::rc::Rc;
 pub enum ProjectionMode {
     /// FIXME (#32205)
     /// At coherence-checking time, we're still constructing the
-    /// specialization graph, and thus we only project project
+    /// specialization graph, and thus we only project
     /// non-`default` associated types that are defined directly in
     /// the applicable impl. (This behavior should be improved over
     /// time, to allow for successful projections modulo cycles

branches/auto/src/librustc/ty/trait_def.rs

@@ -176,7 +176,7 @@ impl<'tcx> TraitDef<'tcx> {
     /// Records a trait-to-implementation mapping for a non-local impl.
     ///
     /// The `parent_impl` is the immediately-less-specialized impl, or the
-    /// trait's def ID if the impl is is not a specialization -- information that
+    /// trait's def ID if the impl is not a specialization -- information that
     /// should be pulled from the metadata.
     pub fn record_remote_impl(&self,
                               tcx: &TyCtxt<'tcx>,

branches/auto/src/librustc/ty/wf.rs

@@ -272,7 +272,7 @@ impl<'a,'tcx> WfPredicates<'a,'tcx> {
     /// into `self.out`.
     fn compute_projection(&mut self, data: ty::ProjectionTy<'tcx>) {
         // A projection is well-formed if (a) the trait ref itself is
-        // WF WF and (b) the trait-ref holds.  (It may also be
+        // WF and (b) the trait-ref holds.  (It may also be
         // normalizable and be WF that way.)
 
         self.compute_trait_ref(&data.trait_ref);

branches/auto/src/librustc_back/target/i686_unknown_linux_musl.rs

@@ -8,31 +8,14 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// See x86_64_unknown_linux_musl for explanation of arguments
-
 use target::Target;
 
 pub fn target() -> Target {
-    let mut base = super::linux_base::opts();
+    let mut base = super::linux_musl_base::opts();
     base.cpu = "pentium4".to_string();
     base.pre_link_args.push("-m32".to_string());
     base.pre_link_args.push("-Wl,-melf_i386".to_string());
 
-    base.pre_link_args.push("-nostdlib".to_string());
-    base.pre_link_args.push("-static".to_string());
-    base.pre_link_args.push("-Wl,--eh-frame-hdr".to_string());
-
-    base.pre_link_args.push("-Wl,-(".to_string());
-    base.post_link_args.push("-Wl,-)".to_string());
-
-    base.pre_link_objects_exe.push("crt1.o".to_string());
-    base.pre_link_objects_exe.push("crti.o".to_string());
-    base.post_link_objects.push("crtn.o".to_string());
-
-    base.dynamic_linking = false;
-    base.has_rpath = false;
-    base.position_independent_executables = false;
-
     Target {
         llvm_target: "i686-unknown-linux-musl".to_string(),
         target_endian: "little".to_string(),

branches/auto/src/librustc_back/target/linux_musl_base.rs

@@ -0,0 +1,71 @@
+// Copyright 2016 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.
+
+use target::TargetOptions;
+
+pub fn opts() -> TargetOptions {
+    let mut base = super::linux_base::opts();
+
+    // Make sure that the linker/gcc really don't pull in anything, including
+    // default objects, libs, etc.
+    base.pre_link_args.push("-nostdlib".to_string());
+    base.pre_link_args.push("-static".to_string());
+
+    // At least when this was tested, the linker would not add the
+    // `GNU_EH_FRAME` program header to executables generated, which is required
+    // when unwinding to locate the unwinding information. I'm not sure why this
+    // argument is *not* necessary for normal builds, but it can't hurt!
+    base.pre_link_args.push("-Wl,--eh-frame-hdr".to_string());
+
+    // There's a whole bunch of circular dependencies when dealing with MUSL
+    // unfortunately. To put this in perspective libc is statically linked to
+    // liblibc and libunwind is statically linked to libstd:
+    //
+    // * libcore depends on `fmod` which is in libc (transitively in liblibc).
+    //   liblibc, however, depends on libcore.
+    // * compiler-rt has personality symbols that depend on libunwind, but
+    //   libunwind is in libstd which depends on compiler-rt.
+    //
+    // Recall that linkers discard libraries and object files as much as
+    // possible, and with all the static linking and archives flying around with
+    // MUSL the linker is super aggressively stripping out objects. For example
+    // the first case has fmod stripped from liblibc (it's in its own object
+    // file) so it's not there when libcore needs it. In the second example all
+    // the unused symbols from libunwind are stripped (each is in its own object
+    // file in libstd) before we end up linking compiler-rt which depends on
+    // those symbols.
+    //
+    // To deal with these circular dependencies we just force the compiler to
+    // link everything as a group, not stripping anything out until everything
+    // is processed. The linker will still perform a pass to strip out object
+    // files but it won't do so until all objects/archives have been processed.
+    base.pre_link_args.push("-Wl,-(".to_string());
+    base.post_link_args.push("-Wl,-)".to_string());
+
+    // When generating a statically linked executable there's generally some
+    // small setup needed which is listed in these files. These are provided by
+    // a musl toolchain and are linked by default by the `musl-gcc` script. Note
+    // that `gcc` also does this by default, it just uses some different files.
+    //
+    // Each target directory for musl has these object files included in it so
+    // they'll be included from there.
+    base.pre_link_objects_exe.push("crt1.o".to_string());
+    base.pre_link_objects_exe.push("crti.o".to_string());
+    base.post_link_objects.push("crtn.o".to_string());
+
+    // MUSL support doesn't currently include dynamic linking, so there's no
+    // need for dylibs or rpath business. Additionally `-pie` is incompatible
+    // with `-static`, so we can't pass `-pie`.
+    base.dynamic_linking = false;
+    base.has_rpath = false;
+    base.position_independent_executables = false;
+
+    base
+}

branches/auto/src/librustc_back/target/mod.rs

@@ -56,6 +56,7 @@ mod bitrig_base;
 mod dragonfly_base;
 mod freebsd_base;
 mod linux_base;
+mod linux_musl_base;
 mod openbsd_base;
 mod netbsd_base;
 mod solaris_base;
@@ -201,7 +202,7 @@ pub struct TargetOptions {
     pub post_link_args: Vec<String>,
 
     /// Default CPU to pass to LLVM. Corresponds to `llc -mcpu=$cpu`. Defaults
-    /// to "default".
+    /// to "generic".
     pub cpu: String,
     /// Default target features to pass to LLVM. These features will *always* be
     /// passed, and cannot be disabled even via `-C`. Corresponds to `llc