bootstrap: sccache has no effect / RUSTC_WRAPPER not used?  #128633

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1. matthiaskrgr

   added

   T-bootstrapRelevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)

   C-bugCategory: This is a bug.Category: This is a bug.

   on Aug 4, 2024
2. rustbot

   added

   needs-triageThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triagingThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triaging

   on Aug 4, 2024
3. bjorn3 commented on Aug 4, 2024

   

   bjorn3

   on Aug 4, 2024

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   I am pretty sure that sccache will either not be effective (it doesn't cache when --sysroot is passed) or cause actual issues (like not invalidating the cache if the standard library gets changed) if it were to be used.
4. matthiaskrgr commented on Aug 4, 2024

   

   matthiaskrgr

   on Aug 4, 2024

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   I'm wondering if #126476 is related. 🤔

   @bjorn3 from just doing normal compiler bootstraps like x.py build/test/check I don't remember running into any frequent problems tbh 🤔
5. workingjubilee

   changed the title [-]bootstrap: sccache has on effect / RUSTC_WRAPPER not used? [/-] [+]bootstrap: sccache has no effect / RUSTC_WRAPPER not used? [/+] on Aug 4, 2024
6. saethlin

   removed

   needs-triageThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triagingThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triaging

   on Sep 18, 2024
7. Kobzol commented on Aug 25, 2026

   

   Kobzol

   on Aug 25, 2026

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   Sccache should be used for both the compiler and all tools, provided that you are doing a stage 1 build and have incremental compilation turned off. Feel free to reopen if you still run into this.
8. Kobzol

   closed this as completedon Aug 25, 2026