Default value for MACOSX_BUNDLE of targets.
This variable is used to initialize the MACOSX_BUNDLE property on all the targets. See that target property for additional information.
This variable is set to ON by default if CMAKE_SYSTEM_NAME equals to iOS, tvOS or watchOS.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.19/variable/CMAKE_MACOSX_BUNDLE.html