CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
PROJECT(quick_test)

ADD_CUSTOM_COMMAND(
 OUTPUT generated.txt
 COMMAND ${CMAKE_COMMAND} -E copy
  ${PROJECT_SOURCE_DIR}/generated.txt.in
  ${PROJECT_BINARY_DIR}/generated.txt
 DEPENDS generated.txt.in
 )



ADD_CUSTOM_TARGET(${PROJECT_NAME} DEPENDS generated.txt)