test boost root

gcontini

2021-05-19 b84510338059d30f58353695b52d37b27d41c3f9

 .github/workflows/cpp.yml

@@ -15,7 +15,10 @@
      -  uses: actions/checkout@v1
      -  name: Setup 
         shell: bash
         run: echo "BOOST_ROOT=$BOOST_ROOT_1_72_0" >> $GITHUB_ENV
         run: echo 1"$BOOST_ROOT_1_72_0" && echo 2"${{ BOOST_ROOT_1_72_0 }}" && echo 3"${{ env.BOOST_ROOT_1_72_0 }}" 
      -  name: Setup2
         shell: bash
         run: set 
      -  name: Compile
         run: |
            cd build