Does not configure with cmake 4

[phako]

CMake 4 has removed the support for compatibitliy with CMake <=3.5, see this excerpt from its Changelog:

Compatibility with versions of CMake older than 3.5 has been removed. Calls to cmake_minimum_required() or cmake_policy() that set the policy version to an older value now issue an error. Note that calls to those commands can still support older versions of CMake by using their VERSION arguments' ... syntax. This requires only the version of CMake, but when running a newer version, sets policies up to the version.

Could you future-proof your CMakeLists.txt? (I would provide a patch but I do not know your requirements)

[phako]

For reference, I am currently forcing it to a minimum 3.10 which seems to work fine for me

[farindk]

I am a bit confused. libde265 currently uses

cmake_minimum_required (VERSION 3.5.0)

but your cmake warning only says that versions below 3.5 have been deprecated. So 3.5 should still be fine.

On the other hand, in libheif, we use

cmake_minimum_required (VERSION 3.16.3) # Oldest Ubuntu LTS (20.04 currently)

Thus, using 3.16.3 (and probably higher since Ubuntu 20.04 is now also EOL) should also be fine for libde265.

[phako]

hm, you are right. Maybe CMake is confused with itself, because I definitely get this:

CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 has been removed from CMake.
  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.
  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
-- Configuring incomplete, errors occurred!