CMAKE_MAXIMUM_RECURSION_DEPTH

New in version 3.14.

Maximum recursion depth for CMake scripts. It is intended to be set on the command line with -DCMAKE_MAXIMUM_RECURSION_DEPTH=<x>, or within CMakeLists.txt by projects that require a large recursion depth. Projects that set this variable should provide the user with a way to override it. For example:

# About to perform deeply recursive actions
if(NOT CMAKE_MAXIMUM_RECURSION_DEPTH)
  set(CMAKE_MAXIMUM_RECURSION_DEPTH 2000)
endif()

If it is not set, or is set to a non-integer value, a sensible default limit is used. If the recursion limit is reached, the script terminates immediately with a fatal error.

Calling any of the following commands increases the recursion depth:

include()
find_package()
add_subdirectory()
try_compile()
ctest_read_custom_files()
ctest_run_script() (unless NEW_PROCESS is specified)
User-defined function()'s and macro()'s (note that function() and macro() themselves don't increase recursion depth)
Reading or writing variables that are being watched by a variable_watch()

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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.21/variable/CMAKE_MAXIMUM_RECURSION_DEPTH.html