On 09.11.2016 14:57, Ruslan Baratov wrote:
Again policies are not meant to be feature toggles.
You can do a lot of things and there may be valid use cases but in
general policies are not meant to be used this way.
This is made explicit in CMake's documentation on policies.
They exist to preserve backwards compatibility not to pick and choose
behaviours.
So can you show an example of "valid" use of `cmake_policy` command?
To quote the documentation:
"A policy is a deprecation mechanism and not a reliable feature toggle.
A policy should almost never be set to |OLD|, except to silence warnings
in an otherwise frozen or stable codebase, or temporarily as part of a
larger migration path."
Beyond that valid use would be e.g. cmake's own testsuite which needs to
be able to toggle individual policies to verify their behaviour.
Nils
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