Auto merge of #44094 - alexcrichton:long-linkers, r=michaelwoerister
rustc: Attempt to handle super long linker invocations
This commit adds logic to the compiler to attempt to handle super long linker
invocations by falling back to the `@`-file syntax if the invoked command is too
large. Each OS has a limit on how many arguments and how large the arguments can
be when spawning a new process, and linkers tend to be one of those programs
that can hit the limit!
The logic implemented here is to unconditionally attempt to spawn a linker and
then if it fails to spawn with an error from the OS that indicates the command
line is too big we attempt a fallback. The fallback is roughly the same for all
linkers where an argument pointing to a file, prepended with `@`, is passed.
This file then contains all the various arguments that we want to pass to the
linker.
Mark Simulacrum [Thu, 7 Sep 2017 00:28:04 +0000 (18:28 -0600)]
Rollup merge of #44353 - cuviper:install-rustc, r=Mark-Simulacrum
Include rustc in the default `./x.py install`
The default install used to include rustc, rust-std, and rust-docs, but
the refactoring in commit 6b3413d825fa6 make rustc only default in
extended builds. This commit makes rustc installed by default again.
Mark Simulacrum [Thu, 7 Sep 2017 00:27:52 +0000 (18:27 -0600)]
Rollup merge of #44313 - RalfJung:book, r=nikomatsakis
rustbook: remove dead test functions
There is no "test" subcommand added to the `clap::App`, so this is all dead code.
Cc @steveklabnik -- your [commit](https://github.com/RalfJung/rust/commit/a076961fd0e3d8a68f8b047460b8f5191d203b08) introducing this stated the intention of having both commands, but it seems nobody has missed the `test` command since February.
Mark Simulacrum [Thu, 7 Sep 2017 00:27:51 +0000 (18:27 -0600)]
Rollup merge of #44303 - clarcharr:debugs, r=alexcrichton
impl Debug for SplitWhitespace.
This one got missed because `libstd_unicode` doesn't have a `deny(missing_debug_implementations)` like `libstd` and `libcore`. I think that perhaps this lint should check for items exported from other crates too.
Mark Simulacrum [Thu, 7 Sep 2017 00:27:47 +0000 (18:27 -0600)]
Rollup merge of #44218 - SimonSapin:commit-hash, r=alexcrichton
Add full git commit hash to release channel manifests
The full hash is necessary to build the download URL for "alternate" compiler builds. This is a first step for https://github.com/rust-lang-nursery/rustup.rs/issues/1099.
Auto merge of #43975 - RalfJung:gcc, r=alexcrichton
use gcc::Build rather than deprecated gcc::Config
I did `cargo update -p gcc` to upgrade only this package. Is there further process that should be follwoed when updating a build dependency from crates.io?
Full demo available at https://tonberry.quietmisdreavus.net/foreign-test/foreign_test/trait.CheckIt.html
This PR splits the "Implementors" section on trait pages into two: First, for impls on types local to the crate, their impls are kept as-is, printing one line for the impl line, and any additional lines for associated types. However, for types external to the crate, they are now pulled up over the others and are printed (almost) like the summary impl on the type page itself. This gives any doc comments on these impls or methods to be exposed in the documentation.
There's just one small problem, though: [libstd docs apparently surface impls for libc and rand, possibly among others](https://tonberry.quietmisdreavus.net/foreign-std/std/marker/trait.Copy.html#foreign-impls). This adds this section to pages in the std docs where we might not want them to show up in the first place. I think this is a bug distinct from this PR, but it does make it drastically apparent.
~~My question, then, is this: Do we want this here? Taking it out involves fixing which impls are visible to rustdoc, possibly specifically when rendering the std facade. I'm convinced this is fine to land as-is, since it adds a feature specifically for non-std crates (i'm thinking of things like `num` or related crates that implement things on primitives or std types as part of their functionality).~~ (EDIT: I have an open PR to fix this: https://github.com/rust-lang/rust/pull/44026)
Alex Crichton [Sat, 26 Aug 2017 03:16:51 +0000 (20:16 -0700)]
rustc: Attempt to handle super long linker invocations
This commit adds logic to the compiler to attempt to handle super long linker
invocations by falling back to the `@`-file syntax if the invoked command is too
large. Each OS has a limit on how many arguments and how large the arguments can
be when spawning a new process, and linkers tend to be one of those programs
that can hit the limit!
The logic implemented here is to unconditionally attempt to spawn a linker and
then if it fails to spawn with an error from the OS that indicates the command
line is too big we attempt a fallback. The fallback is roughly the same for all
linkers where an argument pointing to a file, prepended with `@`, is passed.
This file then contains all the various arguments that we want to pass to the
linker.
Auto merge of #43426 - qnighy:intercrate-ambiguity-hints, r=nikomatsakis
Add hints when intercrate ambiguity causes overlap.
I'm going to tackle #23980.
# Examples
## Trait impl overlap caused by possible downstream impl
```rust
trait Foo<X> {}
trait Bar<X> {}
impl<X, T> Foo<X> for T where T: Bar<X> {}
impl<X> Foo<X> for i32 {}
fn main() {}
```
```
error[E0119]: conflicting implementations of trait `Foo<_>` for type `i32`:
--> test1.rs:4:1
|
3 | impl<X, T> Foo<X> for T where T: Bar<X> {}
| ------------------------------------------ first implementation here
4 | impl<X> Foo<X> for i32 {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `i32`
|
= note: downstream crates may implement Bar
error: aborting due to previous error
```
## Trait impl overlap caused by possible upstream update
```rust
trait Foo {}
impl<T> Foo for T where T: ::std::fmt::Octal {}
impl Foo for () {}
fn main() {}
```
```
error[E0119]: conflicting implementations of trait `Foo` for type `()`:
--> test2.rs:3:1
|
2 | impl<T> Foo for T where T: ::std::fmt::Octal {}
| ----------------------------------------------- first implementation here
3 | impl Foo for () {}
| ^^^^^^^^^^^^^^^^^^ conflicting implementation for `()`
|
= note: upstream crates may add new impl for std::fmt::Octal in future versions
error: aborting due to previous error
```
## Inherent impl overlap caused by possible downstream impl
Josh Stone [Tue, 5 Sep 2017 21:19:22 +0000 (14:19 -0700)]
Include rustc in the default `./x.py install`
The default install used to include rustc, rust-std, and rust-docs, but
the refactoring in commit 6b3413d825fa6 make rustc only default in
extended builds. This commit makes rustc installed by default again.
Simon Sapin [Mon, 4 Sep 2017 15:31:29 +0000 (17:31 +0200)]
Make git commit info optional and per-package in channel manifests
At the moment it is always missing for Cargo and RLS.
Their respective build systems need to be modified to include
`git-commit-hash` files in their "dist" tarballs.
Auto merge of #44194 - QuietMisdreavus:hey-how-do-i-use-this-new-fangled-thing, r=aturon
expand on using rustup custom toolchains in CONTRIBUTING.md
fixes #42484
Should i include more notes about how to use a local build *without* rustup? It can kinda feel like a cop-out otherwise. Other means that come to mind are setting `$RUSTC` directly and fully installing it.
Auto merge of #44191 - arielb1:on-unimplemented-label, r=nikomatsakis
More general `on_unimplemented`, with uses in `Try`
Allow `on_unimplemented` directives to specify both the label and the primary message of the trait error, and allow them to be controlled by flags - currently only to be desugaring-sensitive.
e.g.
```Rust
#[rustc_on_unimplemented(
on(all(direct, from_desugaring="?"),
message="the `?` operator can only be used in a \
function that returns `Result` \
(or another type that implements `{Try}`)",
label="cannot use the `?` operator in a function that returns `{Self}`"),
)]
```
Auto merge of #44252 - eddyb:what-is-dead-may-never-die, r=nikomatsakis
Better StorageLive / StorageDead placement for constants.
Fixes problems in miri (see https://github.com/solson/miri/pull/324#issuecomment-326555552) caused by the new scope rules in #43932.
What I've tried to do here is always have a `StorageLive` but no `StorageDead` for `'static` slots.
It might not work perfectly in all cases, but it should unblock miri.
Auto merge of #44066 - cuviper:powerpc64-extern-abi, r=alexcrichton
powerpc64: improve extern struct ABI
These fixes all have to do with the 64-bit PowerPC ELF ABI for big-endian
targets. The ELF v2 ABI for powerpc64le already worked well.
- Return after marking return aggregates indirect. Fixes #42757.
- Pass one-member float aggregates as direct argument values.
- Aggregate arguments less than 64-bit must be written in the least-
significant bits of the parameter space.
- Larger aggregates are instead padded at the tail.
(i.e. filling MSBs, padding the remaining LSBs.)
New tests were also added for the single-float aggregate, and a 3-byte
aggregate to check that it's filled into LSBs. Overall, at least these
formerly-failing tests now pass on powerpc64:
projects / rust.git / log