Rollup merge of #148933 - chenyukang:yukang-add-note-bootstrap, r=Kobzol

Zalathar · web-flow · commit 33eb5c26ba99 · 2025-11-14T19:57:08.000+11:00
Add note for option llvm.download-ci-llvm From https://rust-lang.zulipchat.com/#narrow/channel/326414-t-infra.2Fbootstrap/topic/.E2.9C.94.20Updating.20llvm.20submodule.20may.20cost.20much.20time.2C.20can.20we.20skip.2E.2E.2E/with/555335665 I found we already have related note in rustc-dev, it's more helpful to add this in exmaple configuration file.
diff --git a/bootstrap.example.toml b/bootstrap.example.toml
@@ -59,7 +59,10 @@
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
 # Set this to `true` to download if CI llvm available otherwise it builds
-# from `src/llvm-project`.
+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
+# when building compiler locally.
+#
 #
 # Set this to `"if-unchanged"` to download only if the llvm-project has not
 # been modified. You can also use this if you are unsure whether you're on a

Original file line number	Diff line number	Diff line change
`@@ -59,7 +59,10 @@`
`59`	`59`	`# toolchain or changing LLVM locally, you probably want to leave this enabled.`
`60`	`60`	`#`
`61`	`61`	# Set this to `true` to download if CI llvm available otherwise it builds
`62`		-# from `src/llvm-project`.
	`62`	+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
	`63`	+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
	`64`	`+# when building compiler locally.`
	`65`	`+#`
`63`	`66`	`#`
`64`	`67`	# Set this to `"if-unchanged"` to download only if the llvm-project has not
`65`	`68`	`# been modified. You can also use this if you are unsure whether you're on a`