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deb7b4b658
Policy CMP0189, introduced by commit b3da9c6d60 (GenEx: Evaluate LINK_LIBRARIES target properties transitively, 2025-02-24, v4.1.0-rc1~731^2), takes effect at generation time, and so uses the policy value as of the end of each directory. However, some projects may rely on `file(GENERATE)` with the policy's OLD behavior in order to extract targets' *direct* dependencies from `LINK_LIBRARIES`. Pending a first-class solution to that problem, make it easier for projects to port to the policy's NEW behavior in general while retaining the OLD behavior in an isolated context. Fixes: #27220