CI: add workaround for new gcc with julia 1.6 on github runners (#4189)

* CI: add workaround for new gcc with julia 1.6 on github runners

* CI: try using output variable instead of path for julia bindir

.github/workflows/CI.yml

@@ -78,6 +78,7 @@ jobs:
  # be able to properly deal with PRs / merges
  fetch-depth: 2
  - name: "Set up Julia"
+ id: setup-julia
  uses: julia-actions/setup-julia@v2
  with:
  version: ${{ matrix.julia-version }}
@@ -99,6 +100,9 @@ jobs:
  - name: "set test subgroup"
  if: ${{ matrix.group }} != ''
  run: echo "OSCAR_TEST_SUBSET=${{matrix.group}}" >> $GITHUB_ENV
+ - name: "workaround libstdc++ issue for julia 1.6"
+ if: matrix.julia-version == '1.6' && runner.os == 'Linux'
+ run: rm -f ${{ steps.setup-julia.outputs.julia-bindir }}/../lib/julia/libstdc++.so.6
  - name: "Run tests"
  uses: julia-actions/julia-runtest@latest
  with: