CMAKE_CURRENT_FUNCTION
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Cmake/docs/3.21/variable/cmake current function
CMAKE_CURRENT_FUNCTION
New in version 3.17.
When executing code inside a function(), this variable contains the name of the current function. It can be useful for diagnostic or debug messages.
See also CMAKE_CURRENT_FUNCTION_LIST_DIR, CMAKE_CURRENT_FUNCTION_LIST_FILE and CMAKE_CURRENT_FUNCTION_LIST_LINE.
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https://cmake.org/cmake/help/v3.21/variable/CMAKE_CURRENT_FUNCTION.html