diff --git a/.github/workflows/main-cmake-spc.yml b/.github/workflows/main-cmake-spc.yml
index 1ab59563cc8..b83c80beb9f 100644
--- a/.github/workflows/main-cmake-spc.yml
+++ b/.github/workflows/main-cmake-spc.yml
@@ -77,6 +77,66 @@ jobs:
       #
 #      - name: CMake Run Tests
 #        run: ctest . --parallel 2 -C Debug -V
+#        working-directory: ${{ runner.workspace }}/build
+
+  build_v1_8:
+    name: "gcc DBG v1.8 default API"
+    runs-on: ubuntu-latest
+    steps:
+      # SETUP
+      - name: Install Linux Dependencies
+        run: |
+           sudo apt-get update
+           sudo apt-get install ninja-build doxygen graphviz
+           sudo apt install libssl3 libssl-dev libcurl4 libcurl4-openssl-dev
+           sudo apt install gcc-12 g++-12 gfortran-12
+           echo "CC=gcc-12" >> $GITHUB_ENV
+           echo "CXX=g++-12" >> $GITHUB_ENV
+           echo "FC=gfortran-12" >> $GITHUB_ENV
+ 
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - name: Get Sources
+        uses: actions/checkout@v4.1.7
+
+      #
+      # CMAKE CONFIGURE
+      #
+      - name: CMake Configure
+        run: |
+          mkdir "${{ runner.workspace }}/build"
+          cd "${{ runner.workspace }}/build"
+          cmake -C $GITHUB_WORKSPACE/config/cmake/cacheinit.cmake \
+            -G Ninja \
+            -DCMAKE_BUILD_TYPE=Debug \
+            -DBUILD_SHARED_LIBS=ON \
+            -DHDF5_ENABLE_ALL_WARNINGS=ON \
+            -DHDF5_ENABLE_PARALLEL:BOOL=OFF \
+            -DHDF5_BUILD_CPP_LIB:BOOL=ON \
+            -DHDF5_BUILD_FORTRAN=ON \
+            -DHDF5_BUILD_JAVA=ON \
+            -DHDF5_BUILD_DOC=OFF \
+            -DLIBAEC_USE_LOCALCONTENT=OFF \
+            -DZLIB_USE_LOCALCONTENT=OFF \
+            -DHDF5_ENABLE_MIRROR_VFD:BOOL=ON \
+            -DHDF5_ENABLE_DIRECT_VFD:BOOL=ON \
+            -DHDF5_ENABLE_ROS3_VFD:BOOL=ON \
+            -DH5_NO_DEPRECATED_SYMBOLS:BOOL=OFF \
+            -DDEFAULT_API_VERSION:STRING=v18 \
+            $GITHUB_WORKSPACE
+        shell: bash
+
+      #
+      # BUILD
+      #
+      - name: CMake Build
+        run: cmake --build . --parallel 3 --config Debug
+        working-directory: ${{ runner.workspace }}/build
+
+      #
+      # RUN TESTS - disable until some tests are fixed
+      #
+#      - name: CMake Run Tests
+#        run: ctest . --parallel 2 -C Debug -V
 #        working-directory: ${{ runner.workspace }}/build
 
   build_v1_10:
@@ -200,7 +260,7 @@ jobs:
         working-directory: ${{ runner.workspace }}/build
 
   build_v1_14:
-    name: "gcc DBG v1.12 default API"
+    name: "gcc DBG v1.14 default API"
     runs-on: ubuntu-latest
     steps:
       # SETUP
@@ -259,6 +319,66 @@ jobs:
         run: ctest . --parallel 2 -C Debug -V
         working-directory: ${{ runner.workspace }}/build
 
+  build_v1_16:
+    name: "gcc DBG v1.16 default API"
+    runs-on: ubuntu-latest
+    steps:
+      # SETUP
+      - name: Install Linux Dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install ninja-build doxygen graphviz
+          sudo apt install libssl3 libssl-dev libcurl4 libcurl4-openssl-dev
+          sudo apt install gcc-12 g++-12 gfortran-12
+          echo "CC=gcc-12" >> $GITHUB_ENV
+          echo "CXX=g++-12" >> $GITHUB_ENV
+          echo "FC=gfortran-12" >> $GITHUB_ENV
+
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - name: Get Sources
+        uses: actions/checkout@v4.1.7
+
+      #
+      # CMAKE CONFIGURE
+      #
+      - name: CMake Configure
+        run: |
+          mkdir "${{ runner.workspace }}/build"
+          cd "${{ runner.workspace }}/build"
+          cmake -C $GITHUB_WORKSPACE/config/cmake/cacheinit.cmake \
+            -G Ninja \
+            -DCMAKE_BUILD_TYPE=Debug \
+            -DBUILD_SHARED_LIBS=ON \
+            -DHDF5_ENABLE_ALL_WARNINGS=ON \
+            -DHDF5_ENABLE_PARALLEL:BOOL=OFF \
+            -DHDF5_BUILD_CPP_LIB:BOOL=ON \
+            -DHDF5_BUILD_FORTRAN=ON \
+            -DHDF5_BUILD_JAVA=ON \
+            -DHDF5_BUILD_DOC=OFF \
+            -DLIBAEC_USE_LOCALCONTENT=OFF \
+            -DZLIB_USE_LOCALCONTENT=OFF \
+            -DHDF5_ENABLE_MIRROR_VFD:BOOL=ON \
+            -DHDF5_ENABLE_DIRECT_VFD:BOOL=ON \
+            -DHDF5_ENABLE_ROS3_VFD:BOOL=ON \
+            -DH5_NO_DEPRECATED_SYMBOLS:BOOL=OFF \
+            -DDEFAULT_API_VERSION:STRING=v116 \
+            $GITHUB_WORKSPACE
+        shell: bash
+
+      #
+      # BUILD
+      #
+      - name: CMake Build
+        run: cmake --build . --parallel 3 --config Debug
+        working-directory: ${{ runner.workspace }}/build
+
+      #
+      # RUN TESTS
+      #
+      - name: CMake Run Tests
+        run: ctest . --parallel 2 -C Debug -V
+        working-directory: ${{ runner.workspace }}/build
+
   build_zlibng:
     name: "gcc use zlib-ng filter"
     runs-on: ubuntu-latest