Ub 12.04

.github/workflows/CI-unixish-docker.yml

@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        image: ["centos:7", "ubuntu:14.04", "ubuntu:16.04", "ubuntu:21.10"]
+        image: ["gcc:4.6"]
       fail-fast: false # Prefer quick result
 
     runs-on: ubuntu-20.04
@@ -18,6 +18,11 @@ jobs:
       image: ${{ matrix.image }}
 
     steps:
+      - name: Install prerequisites for gcc:4.6
+        if: matrix.image == 'gcc:4.6'
+        run: |
+          #echo "CXX=gcc-4.6" >> $GITHUB_ENV
+
       - uses: actions/checkout@v2
 
       - name: Install missing software on CentOS 7