CMP0143 seemingly not working, how to debug?

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1

Hi there, a colleague of mine was upgrading our CMake version from 3.24.2 to 3.31.6 (along with all the policy changes) and we stumbled upon some strange behaviour with the USE_FOLDERS property which should now default to ON.

We have been explicitly setting: set_property(GLOBAL PROPERTY USE_FOLDERS ON) before and thought we could remove those calls now with the new policies, but the generated VS solutions didn’t have any folders in them.

I believe we checked that: USE_FOLDERS is not set at the end of the top-level CMakeLists.txt, and that the CMP0143 policy value is NEW.

Putting an explicit call to set_property at the end fixes this so we’re probably not going to spend much more time debugging it, but wanted to ask around what that would entail.

2

It will only default to ON if you’ve updated your cmake_minimum_required() at the top of your project to include CMake 3.26 or later. Without that, you’re still getting OLD policy settings for all policies in CMake versions later than whatever your cmake_minimum_required() is set to.

3

Yes actually we have that, i.e. cmake_minimum_required(VERSION 3.31.6) as the very first statement in the top level CMakeLists.txt. It is not being called in a function either.

4

Sounds like a bug then. If you’ve got a small, complete project that demonstrates the behavior, please open a new issue for it: https://gitlab.kitware.com/cmake/cmake/-/issues/new