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Unfortunately the `parking_lot` crate enables the `synchapi` feature of the
`winapi` crate which activates a dependency on `libsynchronization.a`. The MinGW
version of `libsynchronization.a` pulls in a dependency
`api-ms-core-synch-l1-2-0.dll` which causes rustc to not work on Windows 7
(tracked in #49438)
The `parking_lot` crate is not currently used in the compiler unless parallel
queries are enabled. This feature is not enabled by default and not used at all
in the beta/stable compilers. As a result the dependency in this commit was
removed and the CI build which checks parallel queries was disabled.
This isn't a great long-term solution but should hopefully be enough of a patch
for beta to buy us some more time to figure this out.
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The ena version has an improved interface. I suspect
`librustc_data_structures` should start migrating out to crates.io in
general.
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Upgrade `log` to `0.4` in multiple crates.
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This commit deletes the internal liblog in favor of the implementation that
lives on crates.io. Similarly it's also setting a convention for adding crates
to the compiler. The main restriction right now is that we want compiler
implementation details to be unreachable from normal Rust code (e.g. requires a
feature), and by default everything in the sysroot is reachable via `extern
crate`.
The proposal here is to require that crates pulled in have these lines in their
`src/lib.rs`:
#![cfg_attr(rustbuild, feature(staged_api, rustc_private))]
#![cfg_attr(rustbuild, unstable(feature = "rustc_private", issue = "27812"))]
This'll mean that by default they're not using these attributes but when
compiled as part of the compiler they do a few things:
* Mark themselves as entirely unstable via the `staged_api` feature and the
`#![unstable]` attribute.
* Allow usage of other unstable crates via `feature(rustc_private)` which is
required if the crate relies on any other crates to compile (other than std).
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This commit updates the version number to 1.17.0 as we're not on that version of
the nightly compiler, and at the same time this updates src/stage0.txt to
bootstrap from freshly minted beta compiler and beta Cargo.
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These describe the structure of all our crate dependencies.
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