RFC: tests/docker: add rust to debian-legacy-test-cross

Unfortunately, debian 11 has bindgen version 0.55...
Should we install it with cargo install bindgen-cli?

Linking is still failing with -lrt, despite it being present in the link arguments...

Signed-off-by: Marc-André Lureau <[email protected]>
Message-Id: <[email protected]>

Author: elmarco

.gitlab-ci.d/buildtest.yml

@@ -389,7 +389,7 @@ build-legacy:
   variables:
     IMAGE: debian-legacy-test-cross
     TARGETS: alpha-linux-user alpha-softmmu sh4-linux-user
-    CONFIGURE_ARGS: --disable-tools
+    CONFIGURE_ARGS: --disable-tools --enable-rust
     MAKE_CHECK_ARGS: check-tcg
 
 build-user-hexagon:

tests/docker/dockerfiles/debian-legacy-test-cross.docker

@@ -24,6 +24,7 @@ RUN export DEBIAN_FRONTEND=noninteractive && \
 RUN DEBIAN_FRONTEND=noninteractive eatmydata \
         apt install -y --no-install-recommends \
         bison \
+        cargo-web \
         ccache \
         clang  \
         flex \
@@ -36,14 +37,20 @@ RUN DEBIAN_FRONTEND=noninteractive eatmydata \
         python3-pip \
         python3-setuptools \
         python3-venv \
-        python3-wheel && \
+        python3-wheel \
+        rustc-web \
+        && \
         dpkg-query --showformat '${Package}_${Version}_${Architecture}\n' --show > /packages.txt
 
+ENV CARGO_HOME=/usr/local/cargo
+RUN cargo install bindgen-cli
+
 RUN /usr/bin/pip3 install tomli
 
 ENV QEMU_CONFIGURE_OPTS --disable-system --disable-docs --disable-tools
 ENV DEF_TARGET_LIST alpha-linux-user,sh4-linux-user
 ENV MAKE /usr/bin/make
+ENV PATH=$CARGO_HOME/bin:$PATH
 # As a final step configure the user (if env is defined)
 ARG USER
 ARG UID