[workflows] Update GitHub actions to use modern tools

Build classic-flang-llvm-project and flang with GCC 12 and Clang 14/15
on Ubuntu 22.04.

Author: bryanpkc

.github/workflows/flang-arm64-tests.yml

@@ -12,20 +12,20 @@ jobs:
       build_path: /home/github
       install_prefix: /home/github/usr/local
     container:
-      image: ghcr.io/${{ github.repository_owner}}/ubuntu20-flang-${{ github.base_ref }}:latest
+      image: ghcr.io/${{ github.repository_owner}}/ubuntu-flang-${{ github.base_ref }}:latest
       credentials:
         username: github
     strategy:
       matrix:
         target: [AArch64]
         cc: [clang]
         cpp: [clang++]
-        version: [10, 11]
+        version: [14, 15]
         include:
           - target: AArch64
             cc: gcc
             cpp: g++
-            version: 10
+            version: 12
 
     steps:
       - name: Check tools

.github/workflows/flang-tests.yml

@@ -7,20 +7,20 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     env:
       install_prefix: /usr/local
     strategy:
       matrix:
         target: [X86]
         cc: [clang]
         cpp: [clang++]
-        version: [10, 11]
+        version: [14, 15]
         include:
           - target: X86
             cc: gcc
             cpp: g++
-            version: 10
+            version: 12
 
     steps:
       - uses: actions/checkout@v2
@@ -29,20 +29,15 @@ jobs:
         run: |
           sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
           sudo touch /etc/apt/sources.list.d/llvm.list
-          echo 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-11 main' | sudo tee -a /etc/apt/sources.list.d/llvm.list
-          echo 'deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal-11 main'  | sudo tee -a /etc/apt/sources.list.d/llvm.list
-          wget -q -O - http://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add -
           sudo apt update
           sudo apt install -f -y llvm-${{ matrix.version }} clang-${{ matrix.version}}
 
-      - if: matrix.cc == 'gcc' && matrix.version == '10'
+      - if: matrix.cc == 'gcc'
         run: |
           sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
-          sudo apt install gcc-10 g++-10
-          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 10
-          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 20
-          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 10
-          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-10 20
+          sudo apt install gcc-${{ matrix.version }} g++-${{ matrix.version }}
+          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-${{ matrix.version }} 20
+          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-${{ matrix.version }} 20
 
       - name: ccache
         uses: hendrikmuhs/ccache-action@v1

.github/workflows/pre-compile_llvm.yml

@@ -13,40 +13,34 @@ jobs:
     strategy:
       matrix:
         target: [X86]
-        cc: [clang, gcc]
-        version: [10, 11]
+        cc: [clang]
+        cpp: [clang++]
+        version: [14, 15]
+        include:
+          - target: X86
+            cc: gcc
+            cpp: g++
+            version: 12
 
     steps:
       - if: matrix.cc == 'clang'
         run: |
-          echo "cpp=clang++" >> $GITHUB_ENV
           sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
-          sudo touch /etc/apt/sources.list.d/llvm.list
-          echo 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-11 main' | sudo tee -a /etc/apt/sources.list.d/llvm.list
-          echo 'deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal-11 main'  | sudo tee -a /etc/apt/sources.list.d/llvm.list
-          wget -q -O - http://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add -
           sudo apt update
-          sudo apt install -f -y llvm-${{ matrix.version }} clang-${{ matrix.version}}
-
-      - if: matrix.cc == 'gcc' && matrix.version == '10'
-        run: |
-          echo "cpp=g++" >> $GITHUB_ENV
-          sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
-          sudo apt install gcc-10 g++-10
+          sudo apt install -f -y llvm-${{ matrix.version }} clang-${{ matrix.version }}
 
-      - if: matrix.cc == 'gcc' && matrix.version == '11'
+      - if: matrix.cc == 'gcc'
         run: |
-          echo "cpp=g++" >> $GITHUB_ENV
           sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
-          sudo apt install gcc-11 g++-11
+          sudo apt install gcc-${{ matrix.version }} g++-${{ matrix.vresion }}
 
       - name: Check tools
         run: |
           git --version
           cmake --version
           make --version
           ${{ matrix.cc }}-${{ matrix.version }} --version
-          ${{env.cpp}}-${{ matrix.version }} --version
+          ${{ matrix.cpp }}-${{ matrix.version }} --version
 
       - name: Extract branch name
         run: echo "::set-output name=branch::${GITHUB_REF#refs/heads/}"
@@ -66,7 +60,7 @@ jobs:
             -t ${{ matrix.target }} \
             -p /usr/local \
             -a /usr/bin/${{ matrix.cc }}-${{ matrix.version }} \
-            -b /usr/bin/${{env.cpp}}-${{ matrix.version }} \
+            -b /usr/bin/${{ matrix.cpp }}-${{ matrix.version }} \
             -n $(nproc) \
             -x "-DLLVM_ENABLE_ASSERTIONS=ON" \
             -v