CMake: CMP0075 requires CMake >= 3.12. #2218
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The presence of cmake_policy(CMP0075 required CMake >=3.12, and errors with older CMake. Since older versions of CMake than 3.12 are already broken with NetCDF and uncommon nowadays, it may be better to explicitly require 3.12 or newer.
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The error we're seeing on the OSX test is known and frustrating; sorting out what to do about it. |
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The OSX failure is for a known and unrelated issue, so merging anyways. Thank you @scivision |
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The presence of cmake_policy(CMP0075 requires CMake >=3.12, and
errors with older CMake. Since older versions of CMake than 3.12
are already broken with NetCDF and uncommon nowadays, it may be
better to explicitly require 3.12 or newer.
This also enables hinting external libraries such as HDF5 via variable HDF5_ROOT, which is very handy
when using NetCDF from an ExternalProject in CMake.
This also suppresses several nuisance warnings about unexpected behavior when using a modern CMake version.