ci: add single target tests

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: ojeda

.github/workflows/ci.yaml

@@ -471,5 +471,19 @@ jobs:
       # Formatting
       - run: make ${{ env.MAKE_ARCH }} ${{ env.MAKE_CROSS_COMPILE }} ${{ env.MAKE_LLVM_IAS }} ${{ env.MAKE_TOOLCHAIN }} ${{ env.MAKE_OUTPUT }} ${{ env.MAKE_SYSROOT }} -j3 rustfmtcheck
 
+      # Single targets
+      - run: |
+          rm ${{ env.BUILD_DIR }}samples/rust/rust_minimal.o
+
+          make ${{ env.MAKE_ARCH }} ${{ env.MAKE_CROSS_COMPILE }} ${{ env.MAKE_LLVM_IAS }} ${{ env.MAKE_TOOLCHAIN }} ${{ env.MAKE_OUTPUT }} ${{ env.MAKE_SYSROOT }} -j3 samples/rust/rust_minimal.o
+          make ${{ env.MAKE_ARCH }} ${{ env.MAKE_CROSS_COMPILE }} ${{ env.MAKE_LLVM_IAS }} ${{ env.MAKE_TOOLCHAIN }} ${{ env.MAKE_OUTPUT }} ${{ env.MAKE_SYSROOT }} -j3 samples/rust/rust_minimal.i
+          make ${{ env.MAKE_ARCH }} ${{ env.MAKE_CROSS_COMPILE }} ${{ env.MAKE_LLVM_IAS }} ${{ env.MAKE_TOOLCHAIN }} ${{ env.MAKE_OUTPUT }} ${{ env.MAKE_SYSROOT }} -j3 samples/rust/rust_minimal.s
+          make ${{ env.MAKE_ARCH }} ${{ env.MAKE_CROSS_COMPILE }} ${{ env.MAKE_LLVM_IAS }} ${{ env.MAKE_TOOLCHAIN }} ${{ env.MAKE_OUTPUT }} ${{ env.MAKE_SYSROOT }} -j3 samples/rust/rust_minimal.ll
+
+          file ${{ env.BUILD_DIR }}samples/rust/rust_minimal.o | grep -F 'ELF'
+          grep -F '#![feature(prelude_import)]' ${{ env.BUILD_DIR }}samples/rust/rust_minimal.i
+          grep -F '.text'                       ${{ env.BUILD_DIR }}samples/rust/rust_minimal.s
+          grep -F '; ModuleID'                  ${{ env.BUILD_DIR }}samples/rust/rust_minimal.ll
+
       # View changes to ccache
       - run: ccache -s