Diagnosing issue

Author: jay-tux

.github/workflows/c-cpp.yml

@@ -18,5 +18,7 @@ jobs:
     - name: Conan version
       run: echo "${{ steps.conan.outputs.version }}"
     - uses: actions/checkout@v2
+    - name: gcc version
+      rune: g++ -v
     - name: make test
       run: make test