CI: use Ninja in sanitizer jobs

.github/libcxx-setup.sh

@@ -17,7 +17,8 @@ fi
 
 ## Build and install libc++ (Use unstable ABI for better sanitizer coverage)
 mkdir llvm-build && cd llvm-build
-cmake -DCMAKE_C_COMPILER=${CC}                  \
+cmake -GNinja                                   \
+      -DCMAKE_C_COMPILER=${CC}                  \
       -DCMAKE_CXX_COMPILER=${CXX}               \
       -DCMAKE_BUILD_TYPE=RelWithDebInfo         \
       -DCMAKE_INSTALL_PREFIX=/usr               \
@@ -29,7 +30,6 @@ cmake -DCMAKE_C_COMPILER=${CC}                  \
       -DLIBCXX_INCLUDE_TESTS=OFF                \
       -DLIBCXX_INCLUDE_BENCHMARKS=OFF           \
       -DLLVM_ENABLE_RUNTIMES='libcxx;libcxxabi' \
-      -G "Unix Makefiles" \
       ../llvm-project/runtimes/
-make -j cxx cxxabi
+cmake --build . -- cxx cxxabi
 cd ..

.github/workflows/sanitizer.yml

@@ -18,6 +18,11 @@ jobs:
         sanitizer: ['asan', 'ubsan', 'tsan', 'msan']
 
     steps:
+    - name: Installing build dependencies
+      run: |
+        sudo apt update
+        sudo apt install ninja-build
+
     - uses: actions/checkout@v4
 
     - name: configure msan env
@@ -75,7 +80,7 @@ jobs:
       working-directory: ${{ runner.workspace }}/_build
       run: >
         VERBOSE=1
-        cmake $GITHUB_WORKSPACE
+        cmake -GNinja $GITHUB_WORKSPACE
         -DBENCHMARK_ENABLE_ASSEMBLY_TESTS=OFF
         -DBENCHMARK_ENABLE_LIBPFM=OFF
         -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON