Added 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:
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()
See also the CMAKE_MAXIMUM_RECURSION_DEPTH environment variable.