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we properly rebuild the sysroot now when MIRI_LIB_SRC contents change #3354

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Mar 4, 2024
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we properly rebuild the sysroot now when MIRI_LIB_SRC contents change #3354

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6 changes: 1 addition & 5 deletions README.md
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Expand Up @@ -465,11 +465,7 @@ Moreover, Miri recognizes some environment variables:
* `MIRI_LIB_SRC` defines the directory where Miri expects the sources of the
standard library that it will build and use for interpretation. This directory
must point to the `library` subdirectory of a `rust-lang/rust` repository
checkout. Note that changing files in that directory does not automatically
trigger a re-build of the standard library; you have to clear the Miri build
cache with `cargo miri clean` or deleting it manually (on Linux, `rm -rf ~/.cache/miri`;
on Windows, `rmdir /S "%LOCALAPPDATA%\rust-lang\miri\cache"`;
and on macOS, `rm -rf ~/Library/Caches/org.rust-lang.miri`).
checkout.
* `MIRI_SYSROOT` (recognized by `cargo miri` and the Miri driver) indicates the sysroot to use. When
using `cargo miri`, this skips the automatic setup -- only set this if you do not want to use the
automatically created sysroot. For directly invoking the Miri driver, this variable (or a
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