diff --git a/.github/actions/build-and-test/action.yml b/.github/actions/build-and-test/action.yml
index ab43c8d1f..d21a5d3b2 100644
--- a/.github/actions/build-and-test/action.yml
+++ b/.github/actions/build-and-test/action.yml
@@ -35,7 +35,7 @@ runs:
         shell: bash
         working-directory: build
         env:
-          CXXFLAGS: -pedantic -Wextra -Werror
+          CXXFLAGS: -pedantic -Wextra ${{ env.EXTRA_FLAGS }} -Werror
 
       - name: build
         run: make -j3 all man
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 67ef1f000..3b2a94d4f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -239,6 +239,117 @@ jobs:
       - uses: ./.github/actions/ubuntu-prerequisites
       - uses: ./.github/actions/build-and-test
 
+  ubuntu22-pg14-clang14-jit:
+    runs-on: ubuntu-22.04
+
+    env:
+      CC: clang-14
+      CXX: clang++-14
+      LUA_VERSION: 5.4
+      LUAJIT_OPTION: ON
+      POSTGRESQL_VERSION: 14
+      POSTGIS_VERSION: 3
+      CPP_VERSION: 17
+      BUILD_TYPE: Debug
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/ubuntu-prerequisites
+      - uses: ./.github/actions/build-and-test
+
+  ubuntu22-pg14-clang14-proj6:
+    runs-on: ubuntu-22.04
+
+    env:
+      CC: clang-14
+      CXX: clang++-14
+      LUA_VERSION: 5.4
+      LUAJIT_OPTION: OFF
+      POSTGRESQL_VERSION: 14
+      POSTGIS_VERSION: 3
+      CPP_VERSION: 17
+      USE_PROJ_LIB: 6
+      BUILD_TYPE: Debug
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/ubuntu-prerequisites
+      - uses: ./.github/actions/build-and-test
+
+  ubuntu22-pg14-clang14-noproj:
+    runs-on: ubuntu-22.04
+
+    env:
+      CC: clang-14
+      CXX: clang++-14
+      LUA_VERSION: 5.3
+      LUAJIT_OPTION: OFF
+      POSTGRESQL_VERSION: 14
+      POSTGIS_VERSION: 3
+      CPP_VERSION: 17
+      USE_PROJ_LIB: off
+      BUILD_TYPE: Debug
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/ubuntu-prerequisites
+      - uses: ./.github/actions/build-and-test
+
+  ubuntu22-pg14-clang14-cpp17:
+    runs-on: ubuntu-22.04
+
+    env:
+      CC: clang-14
+      CXX: clang++-14
+      LUA_VERSION: 5.4
+      LUAJIT_OPTION: OFF
+      POSTGRESQL_VERSION: 14
+      POSTGIS_VERSION: 3
+      CPP_VERSION: 17
+      USE_PROJ_LIB: 6
+      BUILD_TYPE: Debug
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/ubuntu-prerequisites
+      - uses: ./.github/actions/build-and-test
+
+  ubuntu22-pg14-gcc12-release:
+    runs-on: ubuntu-22.04
+
+    env:
+      CC: gcc-12
+      CXX: g++-12
+      EXTRA_FLAGS: -Wno-stringop-overread
+      LUA_VERSION: 5.4
+      LUAJIT_OPTION: ON
+      POSTGRESQL_VERSION: 14
+      POSTGIS_VERSION: 3
+      CPP_VERSION: 17
+      BUILD_TYPE: Release
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/ubuntu-prerequisites
+      - uses: ./.github/actions/build-and-test
+
+  ubuntu22-pg14-gcc12-release-nolua:
+    runs-on: ubuntu-22.04
+
+    env:
+      CC: gcc-12
+      CXX: g++-12
+      EXTRA_FLAGS: -Wno-stringop-overread
+      POSTGRESQL_VERSION: 14
+      POSTGIS_VERSION: 3
+      CPP_VERSION: 17
+      BUILD_TYPE: Release
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/ubuntu-prerequisites
+      - uses: ./.github/actions/build-and-test
+
   windows:
     strategy:
       fail-fast: false