Run with no boost in special cases workflow

.github/workflows/build-special.yml

@@ -27,6 +27,7 @@ jobs:
             ubuntu-clang-tbb,
             ubuntu-clang-cayleymap,
             ubuntu-clang-system-libs,
+            ubuntu-no-boost,
           ]
 
         build_type: [Debug, Release]
@@ -62,6 +63,12 @@ jobs:
             version: "14"
             flag: system
 
+          - name: ubuntu-no-boost
+            os: ubuntu-22.04
+            compiler: clang
+            version: "14"
+            flag: no_boost
+
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -137,6 +144,13 @@ jobs:
           # sudo apt-get install metis
           # echo "GTSAM_USE_SYSTEM_METIS=ON" >> $GITHUB_ENV
 
+      - name: Turn off boost
+        if: matrix.flag == 'no_boost'
+        run: |
+          echo "GTSAM_ENABLE_BOOST_SERIALIZATION=OFF" >> $GITHUB_ENV
+          echo "GTSAM_USE_BOOST_FEATURES=OFF" >> $GITHUB_ENV
+          echo "GTSAM will not use BOOST"
+
       - name: Build & Test
         run: |
           bash .github/scripts/unix.sh -t