Option to hide non-crucial deprecation warnings

Development
1

Consider example below:


cmake_minimum_required(VERSION 3.5)
project(HelloInstall)

if(POLICY CMP0060) # 3.3
cmake_policy(SET CMP0060 OLD)
endif()

if(POLICY CMP0129) # 3.23
cmake_policy(SET CMP0129 OLD)
endif()

if(POLICY CMP0130) # 3.24
cmake_policy(SET CMP0130 NEW)
endif()

add_executable(hello main.cpp)
install(TARGETS hello DESTINATION bin)

In cmake 3.31 I get warning on using CMP0129=OLD behaviour.

Let’s say I still have users with older cmake (<=3.23) and then I want to keep it as OLD.

So the only way for me to disable it is to use CMAKE_WARN_DEPRECATED=OFF. But there are couple downsides:

  • it will disable cmake_minimum_required check, which is very important, since 3.5 compatibility already removed completely

  • it will hide CMP0060 warning, which is also very important, since this policy goes away with 3.5

Would be great to have some way to disable non-crucial deprecation warnings.

Also, maybe a dumb question, but shouldn’t policies removal coincide with general cmake version compatibility removal? And if I have cmake_minimum_required(VERSION 3.10), which is still compatible cmake version, I shouldn’t get any warnings about using OLD behaviour from cmake policies added in cmake 3.10+.