INSTALL MISSING GCC

.github/workflows/run_test_suite.yml

@@ -38,20 +38,28 @@ jobs:
         include:
           - runs-on: ubuntu-20.04
             gcc: 7
+            install: gcc-7 cpp-7
           - runs-on: ubuntu-20.04
             gcc: 8
+            install: gcc-8 cpp-8
           - runs-on: ubuntu-24.04
             gcc: 9
+            install: gcc-9 cpp-9
           - runs-on: ubuntu-24.04
             gcc: 10
+            install: gcc-10 cpp-10
           - runs-on: ubuntu-24.04
             gcc: 11
+            install: gcc-11 cpp-11
           - runs-on: ubuntu-24.04
             gcc: 12
+            install:
           - runs-on: ubuntu-24.04
             gcc: 13
+            install:
           - runs-on: ubuntu-24.04
             gcc: 14
+            install:
     steps:
       - uses: actions/checkout@v4
 
@@ -88,6 +96,11 @@ jobs:
       - name: "Make GCC ${{ matrix.gcc }} systemwide default"
         run: |-
           set -x -o pipefail
+          if [[ "${{ matrix.install }}" != "" ]]; then
+            sudo apt-get update
+            sudo apt-get install --no-install-recommends --yes -V ${{ matrix.install }}
+          fi
+
           # Make requested version GCC and GCOV the system default
           # before we have an easy way to fully divert "make check"
           # off of the default commands