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In order to keep infinitely-recursive scripts from causing a stack overflow in the CMake executable, CMake now imposes a maximum recursion limit before issuing an error message. The limit can be adjusted at runtime with CMAKE_MAXIMUM_RECURSION_DEPTH. Fixes: #18694
34 lines
1.2 KiB
ReStructuredText
34 lines
1.2 KiB
ReStructuredText
CMAKE_MAXIMUM_RECURSION_DEPTH
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-----------------------------
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Maximum recursion depth for CMake scripts. It is intended to be set on the
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command line with ``-DCMAKE_MAXIMUM_RECURSION_DEPTH=<x>``, or within
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``CMakeLists.txt`` by projects that require a large recursion depth. Projects
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that set this variable should provide the user with a way to override it. For
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example:
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.. code-block:: cmake
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# About to perform deeply recursive actions
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if(NOT CMAKE_MAXIMUM_RECURSION_DEPTH)
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set(CMAKE_MAXIMUM_RECURSION_DEPTH 2000)
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endif()
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If it is not set, or is set to a non-integer value, a sensible default limit is
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used. If the recursion limit is reached, the script terminates immediately with
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a fatal error.
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Calling any of the following commands increases the recursion depth:
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* :command:`include`
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* :command:`find_package`
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* :command:`add_subdirectory`
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* :command:`try_compile`
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* :command:`ctest_read_custom_files`
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* :command:`ctest_run_script` (unless ``NEW_PROCESS`` is specified)
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* User-defined :command:`function`'s and :command:`macro`'s (note that
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:command:`function` and :command:`macro` themselves don't increase recursion
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depth)
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* Reading or writing variables that are being watched by a
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:command:`variable_watch`
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