We thought Google's ABI for arvm7 required neon, but it is
currently optional, perhaps because there is a significant
population of Tegra 2 devices still in use.
This turns off neon code generation outside #[target-feature]
blocks just like we do on armv7-unknown-linux-gnu, but unlike
most other armv7 targets. LLVM defaults to +neon for this target,
so an explicit disable is necessary.
See https://developer.android.com/ndk/guides/abis.html#v7a
for instruction set extension requirements.
Closes#38402.
rustbuild: Add sccache support
This commit adds support for sccache, a ccache-like compiler which works on MSVC
and stores results into an S3 bucket. This also switches over all Travis and
AppVeyor automation to using sccache to ensure a shared and unified cache over
time which can be shared across builders.
The support for sccache manifests as a new `--enable-sccache` option which
instructs us to configure LLVM differently to use a 'sccache' binary instead of
a 'ccache' binary. All docker images for Travis builds are updated to download
Mozilla's tooltool builds of sccache onto various containers and systems.
Additionally a new `rust-lang-ci-sccache` bucket is configured to hold all of
our ccache goodies.
---
Note that this does not currently change Windows [due to previously written up issues](https://github.com/rust-lang/rust/issues/38119#issuecomment-266631585). Despite that, however, I was curious to get timings for the builds on Travis to see what ranges we're working with. As a result, this is a WIP PR I'm using to gauge build times and such.
make deterministic_hash host-architecture-independent
`DefPath::deterministic_hash` used to call `std:#️⃣:Hash`, which depends on the current architecture in several ways, which would prevent metadata written on one host architecture from being successfully read on another one.
Use a hasher we control instead.
Fixes#38177.
r? @michaelwoerister
This erroneously truncated files when the destination already existed and was an
existing hard link to the source. This in turn caused weird bugs!
Closes#37745
Fix unaligned loads in librustc_metadata
Creating a `&[u32]` from an `&[u8]` is not necessarily valid, and crashes
on certain platforms if the data is not well aligned.
rustbuild: Package rust-mingw by default
This fixes the `make dist` step on MinGW to package the `rust-mingw` component
by default. This should hopefully be the last step in fixing nightlies.
The standard implementations of Hasher have architecture-dependent
results when hashing integers. This causes problems when the hashes are
stored within metadata - metadata written by one host architecture can't
be read by another.
To fix that, implement an architecture-independent StableHasher and use
it in all places an architecture-independent hasher is needed.
Fixes#38177.
rustbuild: Add cli option --keep-stage
This option is intended to be used like:
./x.py build --stage 1 --keep-stage 0
Which skips all stage 0 steps, so that stage 1 can be recompiled
directly (even if for example libcore has changes).
This is useful when working on `cfg(not(stage0))` parts of the
libraries or when re-running stage 1 tests in libraries in general.
Fixes#38326
libtest: add --list option to list tests and benchmarks
This option lists all the tests and benchmarks a binary provides without running any of them.
By default the listing is sent to stdout (intended for human consumption), but if `--logfile` is also specified, it is also written there in an easily parsable form.
If filters are specified, they're applied before the output is emitted. The human output will also include a summary unless `-q` is specified.
Redox Support Preview
# Important - This is only a preview of a working `sys::redox`.
Compiling the Redox default distribution with this `libstd` results in a fully functioning distribution. As such, all further changes would be cosmetic or implementing features that have not been used by the default distribution (of which there are only a small number).
I do not expect this to be merged, but would like to discuss how it may be improved and get feedback.
There are a few `unimplemented!()` - `cloexec` for example. I have documented them below. These would be resolved before desiring a merge.
There are also issues with how the Redox syscall library is called - currently I am using a re-export in `libc` but that probably would not be desired.
