Execute smoke test in VM for m68k

Author: antoyo

.github/workflows/nightly_rustc.yml

@@ -48,6 +48,12 @@ jobs:
         remove_packages_one_command: true
         remove_folders: "/usr/share/swift /usr/share/miniconda /usr/share/az* /usr/local/lib/node_modules /usr/local/share/chromium /usr/local/share/powershell /usr/local/julia /usr/local/aws-cli /usr/local/aws-sam-cli /usr/share/gradle"
 
+    - name: Install packages
+      if: ${{ matrix.arch.cross_target != '' }}
+      run: |
+        sudo apt-get update
+        sudo apt-get install qemu-system qemu-user-static
+
     # `rustup show` installs from rust-toolchain.toml
     - name: Setup rust toolchain
       run: rustup show
@@ -63,6 +69,10 @@ jobs:
             sudo dpkg --force-overwrite -i package.deb
         done
 
+    - name: Download VM artifact
+      if: ${{ matrix.arch.cross_target != '' }}
+      run: curl -LO https://github.com/cross-cg-gcc-tools/vms/releases/latest/download/debian-${{ matrix.arch.cross_target }}.img
+
     - name: Download cross-compiling libgccjit.so and move it in libgccjit-libs-dir
       if: ${{ matrix.arch.cross_target != '' }}
       run: |
@@ -84,6 +94,13 @@ jobs:
         mkdir -p $dir
         mv libgccjit-${{ matrix.arch.cross_target }}.so $dir/libgccjit.so
 
+    - name: Prepare VM
+      if: ${{ matrix.arch.cross_target != '' }}
+      run: |
+        mkdir vm
+        sudo mount debian-${{ matrix.arch.cross_target }}.img vm
+        sudo cp $(which qemu-${{ matrix.arch.cross_target }}-static) vm/usr/bin/
+
     - name: Patch linux-raw-sys and rustix.
       if: ${{ matrix.arch.cross_target != '' }}
       run: |
@@ -115,15 +132,29 @@ jobs:
         ./x build --host=${{ matrix.arch.host_target }} --stage 2 --config ../rustc_codegen_gcc/tests/bootstraps/bootstrap.${{ matrix.arch.host_target }}.toml
 
     - name: Link toolchain
+      if: ${{ matrix.arch.cross_target == '' }}
       run: |
         cd rust
         rustup toolchain link my-toolchain build/${{ matrix.arch.host_target }}/stage2
 
     - name: Smoke test
+      if: ${{ matrix.arch.cross_target == '' }}
       run: |
         rustc +my-toolchain -V > output
         grep rustc output
 
+    - name: Copy toolchain in VM
+      if: ${{ matrix.arch.cross_target != '' }}
+      run: |
+        cd rust
+        rsync -a --exclude=stage2/lib/rustlib/src --exclude=stage2/lib/rustlib/rustc-src/ build/m68k-unknown-linux-gnu/stage2 vm/home/stage2
+
+    - name: Smoke test
+      if: ${{ matrix.arch.cross_target != '' }}
+      run: |
+        sudo chroot vm qemu-m68k-static /home/stage2/rustc > output
+        grep rustc output
+
     - name: Compile test program
       run: |
         cd rustc_codegen_gcc/tests/hello-world