Fix for tests/run-make/no-builtins-attribute

Author: antoyo

.github/workflows/ci.yml

@@ -52,6 +52,8 @@ jobs:
       # `llvm-14-tools` is needed to install the `FileCheck` binary which is used for asm tests.
       run: sudo apt-get install ninja-build ripgrep llvm-14-tools llvm libstdc++6
 
+    - run: g++ -v
+
     - run: find / -name libstdc++.so | true
 
     - name: Install rustfmt & clippy

.github/workflows/release.yml

@@ -38,7 +38,8 @@ jobs:
       uses: Swatinem/rust-cache@v2
 
     - name: Install packages
-      run: sudo apt-get install ninja-build ripgrep llvm libstdc++6
+      # `llvm-14-tools` is needed to install the `FileCheck` binary which is used for run-make tests.
+      run: sudo apt-get install ninja-build ripgrep llvm-14-tools llvm libstdc++6
 
     - name: Download artifact
       run: curl -LO https://github.com/rust-lang/gcc/releases/latest/download/gcc-15.deb

build_system/src/test.rs

@@ -534,14 +534,17 @@ fn setup_rustc(env: &mut Env, args: &TestArg) -> Result<PathBuf, String> {
           which FileCheck-11 || \
           which FileCheck-12 || \
           which FileCheck-13 || \
-          which FileCheck-14",
+          which FileCheck-14 || \
+          which FileCheck",
         ],
         rust_dir,
         Some(env),
     ) {
         Ok(cmd) => String::from_utf8_lossy(&cmd.stdout).to_string(),
         Err(_) => {
             eprintln!("Failed to retrieve LLVM FileCheck, ignoring...");
+            // FIXME: the test tests/run-make/no-builtins-attribute will fail if we cannot find
+            // FileCheck.
             String::new()
         }
     };