Error while doing catkin_make - Required exact python 3.8.10 version

[arturokkboss33]

Hello,

After I install all requirements and run catkin_make. The opentera_webrtc_ros CMakeLists.txt in line 42 'add_definitions(-DWEBRTC_POSIX)' outputs the following error:

-- opentera-webrtc-native-client Version : 1.1.3 CMake Error at /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:146 (message): Could NOT find Python: Found unsuitable version "3.8", but required is exact version "3.8.10" (found _Python_EXECUTABLE-NOTFOUND) Call Stack (most recent call first): /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:391 (_FPHSA_FAILURE_MESSAGE) /usr/share/cmake-3.16/Modules/FindPython/Support.cmake:2214 (find_package_handle_standard_args) /usr/share/cmake-3.16/Modules/FindPython.cmake:304 (include) opentera-webrtc-ros/opentera_webrtc_ros/opentera-webrtc/CMakeLists.txt:42 (find_package)
Any advice how I can force to accept 3.8 which is the default in Ubuntu 20.04.

I tried installing 3.8.10 but breaks other things in ROS noetic.

Thanks

[jmnavarrete]

Hello,

I am encountering a similar issue while attempting to build the opentera_webrtc_ros package. When executing catkin_make after installing all requirements, the process fails with the following error:

-- opentera-webrtc-native-client Version : 1.1.3
CMake Error at /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:146 (message):
  Could NOT find Python: Found unsuitable version "3.8", but required is
  exact version "3.8.10" (found _Python_EXECUTABLE-NOTFOUND)
Call Stack (most recent call first):
  /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:391 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.16/Modules/FindPython/Support.cmake:2214 (find_package_handle_standard_args)
  /usr/share/cmake-3.16/Modules/FindPython.cmake:304 (include)
  opentera-webrtc-ros/opentera_webrtc_ros/opentera-webrtc/CMakeLists.txt:37 (find_package)

-- Configuring incomplete, errors occurred!
See also "CMakeFiles/CMakeOutput.log".
See also "CMakeFiles/CMakeError.log".
Invoking "cmake" failed 

I have attempted to address this issue by setting the PYTHON_INCLUDE_DIR variable to '/usr/bin/python3', but the problem persists. Additionally, when I check the Python version using 'python --version' or '/usr/bin/python3 --version', it confirms that Python 3.8.10 is installed.

Do you know how to solve this problem?

Thank you very much.

[philippewarren]

Python 3.8.10 is the default on desktop Ubuntu 20.04. If you have another 3.8, your system might not be up to date.

We actually had a bunch of problems with finding the right Python version from CMake. What we do (here) is we invoke python3 --version to get the system (ROS) version of Python, then ask CMake to find that exact version.

Make sure that you have Python development files (python3-dev) installed too. That might be the problem here.