[BUG] CMP0069

[rongrong1314]

Hi, when I using the latest pybind11 master commit in one of my projects, I get the following error:

CMake Error at /opt/cmake-3.10.3-Linux-x86_64/share/cmake-3.10/Modules/CheckIPOSupported.cmake:138 (message):
Policy CMP0069 is not set
Call Stack (most recent call first):
/usr/local/share/cmake/pybind11/pybind11Tools.cmake:189 (check_ipo_supported)
CMakeLists.txt:34 (pybind11_add_module)

My camke version is 3.10, python is 3.8.
I tried to upgrade cmake , but it didn't work.

[henryiii]

Being fixed in #2370.

[henryiii]

By the way, if you increase your CMake polices, this will work without the fix:

cmake_minimum_required(VERSION 3.4...3.18)