Build with Cmake: Doesn't build with python3.12 or higher: ModuleNotFoundError: No module named 'imp'

[pawsaw]

Problem description

In my projects CMakeLists.txt:

include(FetchContent)
FetchContent_Declare(
  mavsdk
  GIT_REPOSITORY https://github.com/mavlink/MAVSDK.git
  GIT_TAG        v2.2.0
  GIT_SUBMODULES_RECURSE TRUE
)
FetchContent_MakeAvailable(mavsdk)

If cmake picks Python 3.12 (or higher) the build fails:
[cmake] ModuleNotFoundError: No module named 'imp'

imp has been removed in Python 3.12

Expected behavior

Works with Python >= 3.12

Side note:

I tried with

unset(Python3_EXECUTABLE)
find_package (Python 3.10 EXACT REQUIRED COMPONENTS Interpreter Development)

in cmake. However, this seems not to apply to dependencies as fetched by FetchContent_*

Idea

1. Maybe adding

unset(Python3_EXECUTABLE)
find_package (Python 3.10 EXACT REQUIRED COMPONENTS Interpreter Development)

to the MavSDK CMakeLists.txt fixes the issue?

2. Get rid of imp

[julianoes]

We should probably do 2. Do you know where it's required?

[leoplo]

This was happening in future egg but was corrected in 0.18.4 release: PythonCharmers/python-future#632 (well 1.0.0 release because there is no 0.18.4 version on PyPI).

[julianoes]

Ok, so potentially with latest future it should be ok again?

[leoplo]

On my side at least it solved the problem.

[julianoes]

Nice, ok!