The rustc-web package provides a newer Rust compiler (1.78) on all
architectures except mips64el.

Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
 docs/about/build-platforms.rst | 7 ++++---
 tests/lcitool/mappings.yml     | 3 +++
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/docs/about/build-platforms.rst b/docs/about/build-platforms.rst
index 52521552c8a..bfcbb431f10 100644
--- a/docs/about/build-platforms.rst
+++ b/docs/about/build-platforms.rst
@@ -118,9 +118,10 @@ Rust build dependencies
   include bindgen or have an older version, it is recommended to install
   a newer version using ``cargo install bindgen-cli``.
 
-  Developers may want to use Cargo-based tools in the QEMU source tree;
-  this requires Cargo 1.74.0.  Note that Cargo is not required in order
-  to build QEMU.
+  QEMU requires Rust 1.77.0.  This is available on all supported platforms
+  with one exception, namely the ``mips64el`` architecture on Debian bookworm.
+  For all other architectures, Debian bookworm provides a new-enough Rust
+  compiler in the ``rustc-web`` package.
 
 Optional build dependencies
   Build components whose absence does not affect the ability to build QEMU
diff --git a/tests/lcitool/mappings.yml b/tests/lcitool/mappings.yml
index 74eb13d62b6..2ac304b72ff 100644
--- a/tests/lcitool/mappings.yml
+++ b/tests/lcitool/mappings.yml
@@ -64,6 +64,9 @@ mappings:
   python3-wheel:
     OpenSUSELeap15: python311-pip
 
+  rust:
+    Debian12: rustc-web
+
 pypi_mappings:
   # Request more recent version
   meson:
-- 
2.49.0


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