CMake: Don't add uninstall target and CPack config if not top-level

Unidata / netcdf-cxx4

Official GitHub repository for netCDF-C++ libraries and utilities.

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CMake: Don't add uninstall target and CPack config if not top-level #141

Open ZedThree opened 8 months ago

ZedThree commented 8 months ago

Fixes #128

Also fixes a warning when building with recent CMake about minimum required CMake version being unsupported -- this is coincidental, 3.21 is required for the PROJECT_IS_TOP_LEVEL built-in variable