https://github.com/Kitware/CMake
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Tip revision: 1ec72e09471287630cf142d8587a9b8d9abad629 authored by Brad King on 12 March 2020, 13:45:24 UTC
CMake 3.17.0-rc3
Tip revision: 1ec72e0
TOUCH.cmake
set(file "${CMAKE_CURRENT_BINARY_DIR}/file-to-touch")

file(REMOVE "${file}")
file(TOUCH_NOCREATE "${file}")
if(EXISTS "${file}")
  message(FATAL_ERROR "error: TOUCH_NOCREATE created a file!")
endif()

file(TOUCH "${file}")
if(NOT EXISTS "${file}")
  message(FATAL_ERROR "error: TOUCH did not create a file!")
endif()
file(REMOVE "${file}")

file(TOUCH)
file(TOUCH_NOCREATE)
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