ci: build Linux releases on Ubuntu 20.04 for compatibility

Change the Linux build platform from Ubuntu 22.04 to Ubuntu 20.04 so release packages target glibc 2.31 and install on Ubuntu 20.04.

.github/workflows/build-linux-image.yml

@@ -26,8 +26,9 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  IMAGE_NAME: crossdesk/ubuntu22.04
-  STACK_TAG: buildenv-cuda12.6.3-xmake3.0.9-rust1.92.0
+  IMAGE_NAME: crossdesk/ubuntu20.04
+  STACK_TAG: buildenv-cuda12.6.3-gcc10-cmake3.31.6-pipewire0.3.48-xmake3.0.9-rust1.92.0
+  CMAKE_VERSION: 3.31.6
   XMAKE_VERSION: 3.0.9
   RUST_VERSION: 1.92.0
   RUSTUP_VERSION: 1.28.2
@@ -44,11 +45,11 @@ jobs:
           - arch: amd64
             platform: linux/amd64
             runner: ubuntu-24.04
-            base_image: nvidia/cuda:12.6.3-devel-ubuntu22.04
+            base_image: nvidia/cuda:12.6.3-devel-ubuntu20.04
           - arch: arm64
             platform: linux/arm64
             runner: ubuntu-24.04-arm
-            base_image: ubuntu:22.04
+            base_image: ubuntu:20.04
     steps:
       - name: Set candidate tag
         id: image
@@ -86,6 +87,7 @@ jobs:
           sbom: false
           build-args: |
             BASE_IMAGE=${{ matrix.base_image }}
+            CMAKE_VERSION=${{ env.CMAKE_VERSION }}
             XMAKE_VERSION=${{ env.XMAKE_VERSION }}
             RUST_VERSION=${{ env.RUST_VERSION }}
             RUSTUP_VERSION=${{ env.RUSTUP_VERSION }}

.github/workflows/build.yml

@@ -29,12 +29,12 @@ jobs:
         include:
           - arch: amd64
             runner: ubuntu-24.04
-            image: crossdesk/ubuntu22.04:buildenv-cuda12.6.3-xmake3.0.9-rust1.92.0
+            image: crossdesk/ubuntu20.04:buildenv-cuda12.6.3-gcc10-cmake3.31.6-pipewire0.3.48-xmake3.0.9-rust1.92.0
             package_script: ./scripts/linux/pkg_amd64.sh
 
           - arch: arm64
             runner: ubuntu-24.04-arm
-            image: crossdesk/ubuntu22.04:buildenv-cuda12.6.3-xmake3.0.9-rust1.92.0
+            image: crossdesk/ubuntu20.04:buildenv-cuda12.6.3-gcc10-cmake3.31.6-pipewire0.3.48-xmake3.0.9-rust1.92.0
             package_script: ./scripts/linux/pkg_arm64.sh
 
     container:
@@ -106,26 +106,30 @@ jobs:
       - name: Ensure Wayland build dependencies
         shell: bash
         run: |
-          if pkg-config --exists dbus-1 libdrm libpipewire-0.3 libspa-0.2; then
+          if pkg-config --exists dbus-1 libdrm && \
+             test -f /opt/crossdesk-pipewire-sdk/include/pipewire-0.3/pipewire/pipewire.h && \
+             test -f /opt/crossdesk-pipewire-sdk/include/spa-0.2/spa/param/video/format-utils.h; then
             exit 0
           fi
 
           apt-get update
           apt-get install -y --no-install-recommends \
             libdbus-1-dev \
-            libdrm-dev \
-            libpipewire-0.3-dev \
-            libspa-0.2-dev
+            libdrm-dev
           rm -rf /var/lib/apt/lists/*
 
-          pkg-config --exists dbus-1 libdrm libpipewire-0.3 libspa-0.2
+          install-crossdesk-pipewire-sdk
+          pkg-config --exists dbus-1 libdrm
+          test -f /opt/crossdesk-pipewire-sdk/include/pipewire-0.3/pipewire/pipewire.h
+          test -f /opt/crossdesk-pipewire-sdk/include/spa-0.2/spa/param/video/format-utils.h
 
       - name: Build CrossDesk
         env:
           CUDA_PATH: /usr/local/cuda
           XMAKE_GLOBALDIR: /data
         run: |
-          xmake f --CROSSDESK_VERSION=${LEGAL_VERSION} --USE_CUDA=true --USE_WAYLAND=true --root -y
+          xmake f --CROSSDESK_VERSION=${LEGAL_VERSION} --USE_CUDA=true --USE_WAYLAND=true \
+            --cc=gcc-10 --cxx=g++-10 --root -y
           xmake b -vy --root crossdesk
 
       - name: Package
@@ -133,13 +137,19 @@ jobs:
           chmod +x ${{ matrix.package_script }}
           ${{ matrix.package_script }} ${LEGAL_VERSION}
 
-      - name: Verify packaged Ubuntu 22.04 glibc baseline
+      - name: Verify Ubuntu 20.04 package dependency resolution
+        run: |
+          PACKAGE_FILE="${GITHUB_WORKSPACE}/crossdesk-linux-${{ matrix.arch }}-${LEGAL_VERSION}.deb"
+          apt-get update
+          apt-get install --simulate "${PACKAGE_FILE}"
+
+      - name: Verify packaged Ubuntu 20.04 glibc baseline
         run: |
           PACKAGE_FILE="${GITHUB_WORKSPACE}/crossdesk-linux-${{ matrix.arch }}-${LEGAL_VERSION}.deb"
           VERIFY_DIR="${RUNNER_TEMP}/crossdesk-glibc-${{ matrix.arch }}"
           install -d "${VERIFY_DIR}"
           dpkg-deb --extract "${PACKAGE_FILE}" "${VERIFY_DIR}"
-          verify-crossdesk-glibc-baseline "${VERIFY_DIR}" 2.35
+          verify-crossdesk-glibc-baseline "${VERIFY_DIR}" 2.31
 
       - name: Upload artifact
         uses: actions/upload-artifact@v6