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bootstrapping: Clarify that stage0 std code is not executed to produce stage1 compiler #1840

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Dec 19, 2023
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bootstrapping: Clarify that stage0 std code is not executed to produce stage1 compiler #1840

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3 changes: 2 additions & 1 deletion src/building/bootstrapping.md
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Expand Up @@ -66,7 +66,8 @@ which `x.py` will download for you.
(You can also configure `x.py` to use something else.)

The stage0 compiler is then used only to compile `src/bootstrap`, `std`, and `rustc`.
When compiling `rustc`, the stage0 compiler uses the freshly compiled `std`.
When assembling the libraries and binaries that will become the stage1 `rustc`
compiler, the freshly compiled `std` and `rustc` are used.
There are two concepts at play here:
a compiler (with its set of dependencies)
and its 'target' or 'object' libraries (`std` and `rustc`).
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