Switch to supported ubuntu image

.github/workflows/linux.yml

@@ -7,54 +7,46 @@ permissions:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
-        cxx: [g++-4.9, g++-10, clang++-9]
+        cxx: [g++-4.9, g++-11, clang++-11]
         build_type: [Debug, Release]
         std: [11]
         shared: [""]
         include:
           - cxx: g++-4.9
-            install: sudo apt install g++-4.9
-          - cxx: g++-8
+          - cxx: g++-11
             build_type: Debug
             std: 14
-            install: sudo apt install g++-8
-          - cxx: g++-8
-            build_type: Debug
-            std: 17
-            install: sudo apt install g++-8
-          - cxx: g++-9
-            build_type: Debug
-            std: 17
-          - cxx: g++-10
+            install: sudo apt install g++-11
+          - cxx: g++-11
             build_type: Debug
             std: 17
           - cxx: g++-11
             build_type: Debug
             std: 20
             install: sudo apt install g++-11
-          - cxx: clang++-8
+          - cxx: clang++-11
             build_type: Debug
             std: 17
             cxxflags: -stdlib=libc++
-            install: sudo apt install clang-8 libc++-8-dev libc++abi-8-dev
-          - cxx: clang++-9
-            install: sudo apt install clang-9
-          - cxx: clang++-9
+            install: sudo apt install clang-11 libc++-11-dev libc++abi-11-dev
+          - cxx: clang++-11
+            install: sudo apt install clang-11
+          - cxx: clang++-11
             build_type: Debug
             fuzz: -DFMT_FUZZ=ON -DFMT_FUZZ_LINKMAIN=ON
             std: 17
-            install: sudo apt install clang-9
-          - cxx: clang++-11
-            build_type: Debug
-            std: 20
-          - cxx: clang++-11
-            build_type: Debug
-            std: 20
-            cxxflags: -stdlib=libc++
-            install: sudo apt install libc++-11-dev libc++abi-11-dev
+            install: sudo apt install clang-11
+          #- cxx: clang++-13
+          #  build_type: Debug
+          #  std: 20
+          #- cxx: clang++-13
+          #  build_type: Debug
+          #  std: 20
+          #  cxxflags: -stdlib=libc++
+          #  install: sudo apt install libc++-13-dev libc++abi-13-dev
           - cxx: g++-13
             build_type: Release
             std: 23
@@ -67,11 +59,34 @@ jobs:
     - name: Set timezone
       run: sudo timedatectl set-timezone 'Asia/Yekaterinburg'
 
-    - name: Add repositories for older GCC
+    - name: Install GCC 4.9
       run: |
-        # Below repo provides GCC 4.9.
-        sudo apt-add-repository 'deb http://dk.archive.ubuntu.com/ubuntu/ xenial main'
-        sudo apt-add-repository 'deb http://dk.archive.ubuntu.com/ubuntu/ xenial universe'
+        sudo apt update
+        sudo apt install libatomic1 libc6-dev libgomp1 libitm1 libmpc3
+        # https://launchpad.net/ubuntu/xenial/amd64/g++-4.9/4.9.3-13ubuntu2
+        wget --no-verbose \
+          http://launchpadlibrarian.net/230069137/libmpfr4_3.1.3-2_amd64.deb \
+          http://launchpadlibrarian.net/253728314/gcc-4.9-base_4.9.3-13ubuntu2_amd64.deb \
+          http://launchpadlibrarian.net/445345919/gcc-5-base_5.4.0-6ubuntu1~16.04.12_amd64.deb \
+          http://launchpadlibrarian.net/253728399/cpp-4.9_4.9.3-13ubuntu2_amd64.deb \
+          http://launchpadlibrarian.net/253728424/libasan1_4.9.3-13ubuntu2_amd64.deb \
+          http://launchpadlibrarian.net/445346135/libubsan0_5.4.0-6ubuntu1~16.04.12_amd64.deb \
+          http://launchpadlibrarian.net/445346112/libcilkrts5_5.4.0-6ubuntu1~16.04.12_amd64.deb \
+          http://launchpadlibrarian.net/253728426/libgcc-4.9-dev_4.9.3-13ubuntu2_amd64.deb \
+          http://launchpadlibrarian.net/253728404/gcc-4.9_4.9.3-13ubuntu2_amd64.deb \
+          http://launchpadlibrarian.net/253728432/libstdc++-4.9-dev_4.9.3-13ubuntu2_amd64.deb \
+          http://launchpadlibrarian.net/253728401/g++-4.9_4.9.3-13ubuntu2_amd64.deb
+        sudo dpkg -i libmpfr4_3.1.3-2_amd64.deb \
+          gcc-4.9-base_4.9.3-13ubuntu2_amd64.deb \
+          gcc-5-base_5.4.0-6ubuntu1~16.04.12_amd64.deb \
+          cpp-4.9_4.9.3-13ubuntu2_amd64.deb \
+          libasan1_4.9.3-13ubuntu2_amd64.deb \
+          libubsan0_5.4.0-6ubuntu1~16.04.12_amd64.deb \
+          libcilkrts5_5.4.0-6ubuntu1~16.04.12_amd64.deb \
+          libgcc-4.9-dev_4.9.3-13ubuntu2_amd64.deb \
+          gcc-4.9_4.9.3-13ubuntu2_amd64.deb \
+          libstdc++-4.9-dev_4.9.3-13ubuntu2_amd64.deb \
+          g++-4.9_4.9.3-13ubuntu2_amd64.deb
       if: ${{ matrix.cxx == 'g++-4.9' }}
 
     - name: Add repositories for newer GCC
@@ -81,7 +96,7 @@ jobs:
 
     - name: Add Ubuntu mirrors
       run: |
-        # Github Actions caching proxy is at times unreliable
+        # GitHub Actions caching proxy is at times unreliable
         # see https://github.com/actions/runner-images/issues/7048
         printf 'http://azure.archive.ubuntu.com/ubuntu\tpriority:1\n' | sudo tee /etc/apt/mirrors.txt
         curl http://mirrors.ubuntu.com/mirrors.txt | sudo tee --append /etc/apt/mirrors.txt
@@ -89,7 +104,7 @@ jobs:
 
     - name: Create Build Environment
       run: |
-        sudo apt update
+        sudo apt update --allow-unauthenticated
         ${{matrix.install}}
         sudo apt install locales-all
         cmake -E make_directory ${{runner.workspace}}/build