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Remove --extern-location and all associated code

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`--extern-location` was an experiment to investigate the best way to
generate useful diagnostics for unused dependency warnings by enabling a
build system to identify the corresponding build config.

While I did successfully use this, I've since been convinced the
alternative `--json unused-externs` mechanism is the way to go, and
there's no point in having two mechanisms with basically the same
functionality.

This effectively reverts https://github.com/rust-lang/rust/pull/72603
This commit is contained in:
Jeremy Fitzhardinge 2022-04-14 23:07:57 -07:00 • committed by Jeremy Fitzhardinge
parent e7575f9670
commit 1be1157d75
36 changed files with 6 additions and 517 deletions
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compiler/rustc_session/src/options.rs
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@ -183,7 +183,6 @@ top_level_options!(
borrowck_mode: BorrowckMode [UNTRACKED],
cg: CodegenOptions [SUBSTRUCT],
externs: Externs [UNTRACKED],
extern_dep_specs: ExternDepSpecs [UNTRACKED],
crate_name: Option<String> [TRACKED],
/// Indicates how the compiler should treat unstable features.
unstable_features: UnstableFeatures [TRACKED],