[clang] [Clang][CMake] Support perf, LBR, and Instrument CLANG_BOLT options (PR #69133)

Amir Ayupov via cfe-commits cfe-commits at lists.llvm.org
Sun Jan 28 11:13:01 PST 2024


aaupov wrote:

This issue with incremental builds is explicitly mentioned in [HowToAddABuilder](https://llvm.org/docs/HowToAddABuilder.html):

> Use CCache and NOT incremental builds
Using ccache materially improves average build times. Incremental builds can be slightly faster, but introduce the risk of build corruption due to e.g. state changes, etc… At this point, the recommendation is not to use incremental builds and instead use ccache as the latter captures the majority of the benefit with less risk of false positives.

I've sent an email to builders owners. Still, sorry about landing it on a weekend. I expected that builders are configured according to the guidelines so the issues will clear automatically. Apologies for those depending on these broken builders.

https://github.com/llvm/llvm-project/pull/69133


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