CI Failure in ubuntu 20.04-apt March 2023

[GiulioRomualdi]

In all the latest PR the ubuntu 20.04-apt CI fails with the following error:

2023-03-27T08:37:04.7308490Z [ 75%] Building CXX object bindings/python/CMakeFiles/pybind11_blf.dir/bipedal_locomotion_framework.cpp.o
2023-03-27T08:37:07.2958342Z [ 76%] Building CXX object bindings/python/CMakeFiles/pybind11_blf.dir/System/src/Advanceable.cpp.o
2023-03-27T08:37:08.8024829Z In file included from /home/runner/work/bipedal-locomotion-framework/bipedal-locomotion-framework/src/ParametersHandler/include/BipedalLocomotion/ParametersHandler/IParametersHandler.h:16,
2023-03-27T08:37:08.8025924Z                  from /home/runner/work/bipedal-locomotion-framework/bipedal-locomotion-framework/src/System/include/BipedalLocomotion/System/Advanceable.h:13,
2023-03-27T08:37:08.8026941Z                  from /home/runner/work/bipedal-locomotion-framework/bipedal-locomotion-framework/bindings/python/System/include/BipedalLocomotion/bindings/System/Advanceable.h:17,
2023-03-27T08:37:08.8027878Z                  from /home/runner/work/bipedal-locomotion-framework/bipedal-locomotion-framework/bindings/python/System/src/Advanceable.cpp:13:
2023-03-27T08:37:08.8029547Z /home/runner/work/bipedal-locomotion-framework/bipedal-locomotion-framework/src/GenericContainer/include/BipedalLocomotion/GenericContainer/TemplateHelpers.h:212:43: error: expected template-name before ‘<’ token
2023-03-27T08:37:08.8046238Z   212 | struct is_string : public std::disjunction<std::is_same<char*, typename std::decay<T>::type>,
2023-03-27T08:37:08.8047296Z       |                                           ^
2023-03-27T08:37:08.8048334Z /home/runner/work/bipedal-locomotion-framework/bipedal-locomotion-framework/src/GenericContainer/include/BipedalLocomotion/GenericContainer/TemplateHelpers.h:212:43: error: expected ‘{’ before ‘<’ token
2023-03-27T08:37:08.8049958Z /home/runner/work/bipedal-locomotion-framework/bipedal-locomotion-framework/src/GenericContainer/include/BipedalLocomotion/GenericContainer/TemplateHelpers.h:224:16: error: ‘string_view’ in namespace ‘std’ does not name a type
2023-03-27T08:37:08.8053034Z   224 | constexpr std::string_view
2023-03-27T08:37:08.8054150Z       |                ^~~~~~~~~~~

Here is the original error: https://github.com/ami-iit/bipedal-locomotion-framework/actions/runs/4510249345/jobs/7940979417?pr=634#step:21:1013

@traversaro as far as I understood the superbuild works fine: https://github.com/robotology/robotology-superbuild/actions/runs/4527974198/jobs/7974321290

[traversaro]

@traversaro as far as I understood the superbuild works fine: https://github.com/robotology/robotology-superbuild/actions/runs/4527974198/jobs/7974321290

Not really. The Ubuntu 20.04 on Docker (so with the CMake 3.16.3) is working fine, while the Ubuntu 20.04 on the GitHub Runner image is failing due to robotology/robotology-superbuild#1366, so I am not arriving at the point where I could be experiencing that problem.

[traversaro]

Furthermore, note that this is failing only when we explicitly disable the YARP dependency (Testing YARP as missing dependency.), so it is possible that on the superbuild everything works fine as we do not disable the YARP dependency. It may be some strange corner case due to passing cmake -DFRAMEWORK_USE_YARP:BOOL=OFF . in a build directory in which before YARP was enabled.

[GiulioRomualdi]

Fixed by #635