We have a set of shared CMake scripts that are used by all of our projects and their dependencies. Up until recently we have done something on the lines of
project(MyProject)
include(../SharedCMakeScripts/Common.cmake)
cmake_minimum_required(VERSION ${CMN_CMAKE_MIN_VERSION} FATAL_ERROR)
where in Common.cmake we have something on the lines of
# Required version of CMake
set(CMN_CMAKE_MIN_VERSION 3.22)
cmake_minimum_required(VERSION ${CMN_CMAKE_MIN_VERSION} FATAL_ERROR)
cmake_policy(SET CMP0011 NEW)
...
This provides us with a central place to set the minimum version of CMake since all our internal projects use this same Common.cmake file which also defines a number of helper macros, functions, etc.
From CMake 3.27 onward we (as expected) get the warning:
CMake Warning (dev) at CMakeLists.txt:1 (project):
cmake_minimum_required() should be called prior to this top-level project()
call. Please see the cmake-commands(7) manual for usage documentation of
both commands.
So my question is: is there a recommended way to specify this minimum version of CMake globally? I tried in a toolchain file, but that did not seem to have any effect.
Feel free to point me to documentation or other answers/posts if this has been answered elsewhere. I did a search but it is possible the terms I was searching for were incorrect.