Auto merge of #136942 - Kobzol:stage0-sccache, r=jieyouxu

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Use ccache for stage0 tool builds

Now after the stage0 redesign, we can actually start ccaching the build of the compiler itself. We can also cache the bootstrap tools, since these are also built with the stage0 compiler.

Stage0 compiler builds are now being cached: https://github.com/rust-lang/rust/actions/runs/15397246267#summary-43321151192 (`..bootstrap::core::build_steps::compile::Rustc	483.10s	40.41s	-91.6%`). It's not a gigantic win everywhere, but it should help. It seems to make the Linux jobs ~10 minute faster. It should be especially useful on PR builds after https://github.com/rust-lang/rust/pull/141948.

r? `@jieyouxu`

try-job: `x86_64-gnu-llvm-19*`
try-job: `x86_64-msvc*`
try-job: `x86_64-apple*`
try-job: `dist-x86_64-linux`

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bors 2025-06-03 13:09:57 +00:00

parent c911e7d730 592a101be3

commit 7eded778ab

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