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Suggest x build library for a custom toolchain that fails to load core

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This commit is contained in:
Mu001999
2023-07-02 17:53:44 +08:00
parent be6e38c617
commit b913f5593d
2 changed files with 13 additions and 4 deletions
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14
compiler/rustc_metadata/src/errors.rs
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@@ -646,12 +646,18 @@ impl IntoDiagnostic<'_> for CannotFindCrate {
} else {
diag.note(fluent::metadata_target_no_std_support);
}
// NOTE: this suggests using rustup, even though the user may not have it installed.
// That's because they could choose to install it; or this may give them a hint which
// target they need to install from their distro.
if self.missing_core {
diag.help(fluent::metadata_consider_downloading_target);
if env!("CFG_RELEASE_CHANNEL") == "dev" {
diag.help(fluent::metadata_consider_adding_std);
} else {
// NOTE: this suggests using rustup, even though the user may not have it installed.
// That's because they could choose to install it; or this may give them a hint which
// target they need to install from their distro.
diag.help(fluent::metadata_consider_downloading_target);
}
}
// Suggest using #![no_std]. #[no_core] is unstable and not really supported anyway.
// NOTE: this is a dummy span if `extern crate std` was injected by the compiler.
// If it's not a dummy, that means someone added `extern crate std` explicitly and