Without the option, cargo will try using the latest version of the
dependencies of bindgen-cli. While it will obviously respect the
constraints in Cargo.toml, old versions of Cargo do not have
version-constrained resolution and will choke on dependencies
that need Rust 2024.

Cc: Daniel P. Berrangé <[email protected]>
Cc: Peter Maydell <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
---
 docs/about/build-platforms.rst                      | 2 +-
 meson.build                                         | 2 +-
 tests/docker/dockerfiles/fedora-rust-nightly.docker | 2 +-
 tests/docker/dockerfiles/ubuntu2204.docker          | 2 +-
 tests/lcitool/refresh                               | 4 ++--
 5 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/docs/about/build-platforms.rst b/docs/about/build-platforms.rst
index 6e3088d524a..3d23dfbd779 100644
--- a/docs/about/build-platforms.rst
+++ b/docs/about/build-platforms.rst
@@ -114,7 +114,7 @@ Rust build dependencies
   bindgen tool, which is too big to package and distribute.  The minimum
   supported version of bindgen is 0.60.x.  For distributions that do not
   include bindgen or have an older version, it is recommended to install
-  a newer version using ``cargo install bindgen-cli``.
+  a newer version using ``cargo install --locked bindgen-cli``.
 
   QEMU requires Rust 1.83.0.  This is available on all supported platforms
   except for the ``mips64el`` architecture on Debian bookworm.  For all other
diff --git a/meson.build b/meson.build
index d016482db1b..62fab727f4e 100644
--- a/meson.build
+++ b/meson.build
@@ -114,7 +114,7 @@ if have_rust
   bindgen = find_program('bindgen', required: get_option('rust'))
   if not bindgen.found() or bindgen.version().version_compare('<0.60.0')
     if get_option('rust').enabled()
-      error('bindgen version ' + bindgen.version() + ' is unsupported. You can 
install a new version with "cargo install bindgen-cli"')
+      error('bindgen version ' + bindgen.version() + ' is unsupported. You can 
install a new version with "cargo install --locked bindgen-cli"')
     else
       if bindgen.found()
         warning('bindgen version ' + bindgen.version() + ' is unsupported, 
disabling Rust compilation.')
diff --git a/tests/docker/dockerfiles/fedora-rust-nightly.docker 
b/tests/docker/dockerfiles/fedora-rust-nightly.docker
index 043b42a0a9b..38381ef8f59 100644
--- a/tests/docker/dockerfiles/fedora-rust-nightly.docker
+++ b/tests/docker/dockerfiles/fedora-rust-nightly.docker
@@ -179,7 +179,7 @@ RUN set -eux && \
   test "$RUSTDOC" = "$(/usr/local/cargo/bin/rustup +nightly which rustdoc)" && 
\
   test "$RUSTC" = "$(/usr/local/cargo/bin/rustup +nightly which rustc)"
 ENV PATH=$CARGO_HOME/bin:$PATH
-RUN /usr/local/cargo/bin/rustup run nightly cargo install bindgen-cli
+RUN /usr/local/cargo/bin/rustup run nightly cargo install --locked bindgen-cli
 RUN $CARGO --list
 # As a final step configure the user (if env is defined)
 ARG USER
diff --git a/tests/docker/dockerfiles/ubuntu2204.docker 
b/tests/docker/dockerfiles/ubuntu2204.docker
index 23b33d6ad44..44e763f571a 100644
--- a/tests/docker/dockerfiles/ubuntu2204.docker
+++ b/tests/docker/dockerfiles/ubuntu2204.docker
@@ -162,7 +162,7 @@ ENV CARGO_HOME=/usr/local/cargo
 ENV PATH=$CARGO_HOME/bin:$PATH
 RUN DEBIAN_FRONTEND=noninteractive eatmydata \
   apt install -y --no-install-recommends cargo
-RUN cargo install bindgen-cli
+RUN cargo install --locked bindgen-cli
 # As a final step configure the user (if env is defined)
 ARG USER
 ARG UID
diff --git a/tests/lcitool/refresh b/tests/lcitool/refresh
index 259e6ea0729..79a280feab4 100755
--- a/tests/lcitool/refresh
+++ b/tests/lcitool/refresh
@@ -147,7 +147,7 @@ fedora_rustup_nightly_extras = [
     '  test "$RUSTDOC" = "$(/usr/local/cargo/bin/rustup +nightly which 
rustdoc)" && \\\n',
     '  test "$RUSTC" = "$(/usr/local/cargo/bin/rustup +nightly which 
rustc)"\n',
     'ENV PATH=$CARGO_HOME/bin:$PATH\n',
-    'RUN /usr/local/cargo/bin/rustup run nightly cargo install bindgen-cli\n',
+    'RUN /usr/local/cargo/bin/rustup run nightly cargo install --locked 
bindgen-cli\n',
     'RUN $CARGO --list\n',
 ]
 
@@ -158,7 +158,7 @@ ubuntu2204_rust_extras = [
     'ENV PATH=$CARGO_HOME/bin:$PATH\n',
     "RUN DEBIAN_FRONTEND=noninteractive eatmydata \\\n",
     "  apt install -y --no-install-recommends cargo\n",
-    'RUN cargo install bindgen-cli\n',
+    'RUN cargo install --locked bindgen-cli\n',
 ]
 
 debian_all_test_cross_compilers = [
-- 
2.53.0


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