add cpu build

Author: Titus-von-Koeller

.github/workflows/package.yml

@@ -65,6 +65,17 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip
+      
+      - name: Install build tools
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential cmake
+      
+      - name: Compile bitsandbytes with CPU backend
+        run: |
+          cd bitsandbytes
+          cmake -DCOMPUTE_BACKEND=cpu -S . && make
+          cd ..
           
       - name: Download build artifacts
         uses: actions/download-artifact@v4