llvm/cmake/modules/FileLock.cmake - third_party/llvm-project - Git at Google

 # CMake script that synchronizes process execution on a given file lock.
 #
 # Input variables:
 #   LOCK_FILE_PATH    - The file to be locked for the scope of the process of this cmake script.
 #   COMMAND           - The command to be executed.

 file(LOCK ${LOCK_FILE_PATH})
 string(REPLACE "@" ";" command_args ${COMMAND})
 execute_process(COMMAND ${command_args} COMMAND_ERROR_IS_FATAL ANY)
	# CMake script that synchronizes process execution on a given file lock.
	#
	# Input variables:
	# LOCK_FILE_PATH - The file to be locked for the scope of the process of this cmake script.
	# COMMAND - The command to be executed.

	file(LOCK ${LOCK_FILE_PATH})
	string(REPLACE "@" ";" command_args ${COMMAND})
	execute_process(COMMAND ${command_args} COMMAND_ERROR_IS_FATAL ANY)