CMAKE_XCODE_XCCONFIG
New in version 3.24.
If set, the Xcode generator will register the specified file as a global XCConfig file. For target-level XCConfig files see the XCODE_XCCONFIG target property.
This feature is intended to ease migration from native Xcode projects to CMake projects.
Contents of CMAKE_XCODE_XCCONFIG may use generator expressions.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.25/variable/CMAKE_XCODE_XCCONFIG.html