CMAKE_EXECUTE_PROCESS_COMMAND_ERROR_IS_FATAL
Added in version 4.0.
Specify a default for the execute_process() command's COMMAND_ERROR_IS_FATAL option. This variable is ignored when a RESULTS_VARIABLE or RESULT_VARIABLE keyword is supplied to the command.
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https://cmake.org/cmake/help/latest/variable/CMAKE_EXECUTE_PROCESS_COMMAND_ERROR_IS_FATAL.html