message: simplify coverage flags
diff: @@ -64,7 +64,7 @@ runs:
  fi
  fi
  if [[ ${{ inputs.codecov }} == 'YES' ]]; then
  - CPPFLAGS+=" -fprofile-arcs -ftest-coverage -fPIC -O0";
  + CPPFLAGS+=" --coverage -fPIC -g";
  fi
  echo "--- Configure mfem ---"
  cd ${{ inputs.mfem-dir }};
  