CMAKE_ENABLE_EXPORTS
From Get docs
Cmake/docs/3.21/variable/cmake enable exports
CMAKE_ENABLE_EXPORTS
New in version 3.4.
Specify whether executables export symbols for loadable modules.
This variable is used to initialize the ENABLE_EXPORTS target property for executable targets when they are created by calls to the add_executable() command. See the property documentation for details.
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https://cmake.org/cmake/help/v3.21/variable/CMAKE_ENABLE_EXPORTS.html