Set cmake policy CMP0177 in CMakeLists.txt to resolve cmake warning.

[dpsproservices]

This change to CMakeLists.txt is intended to resolve a cmake warning regarding cmake install policy CMP0177 which was introduced in cmake v 3.31.

The install policy is expected to be set to either OLD or NEW.

cmake_policy(SET CMP0177 NEW)

I referred to the information about CMP0177 on the cmake site here: CMP0177

[CLAassistant]

All committers have signed the CLA.

[abique]

LGTM, @baconpaul do you approve as well?

[baconpaul]

We have install rules which contain a . But I’ve never used them. Do we know if anyone does use them? And if they work as designed with NEW? That’s my primary question.

Fine to merge if we can answer that. But if we can’t we could also remove the install rules and the policy set I think

[abique]

So you only get the warning if the normalization would produce a different path.

I'd just go with cmake's new behavior, because I don't feel like maintaining an "old" behavior here.

[baconpaul]

Yeah that's fine! My only question is does it actually work with new?

We may also need to bump the cmake min version to get the CMP in place. Or condition the CMP on cmake version.

[baconpaul]

This is addressed another way in #87