Hello all
I want to make my target dependent on existing non source file on disk.
So far I have the following :
SET_SOURCE_FILES_PROPERTIES(main.cpp OBJECT_DEPENDS
${CMAKE_SOURCE_DIR}/myfile.txt)
ADD_EXECUTABLE(MyTarget main.cpp)
But the this does NOT work, if I touch myfile.txt MyTarget is not rebuild.
I was searching the posts and I found that this can be solved with something
like this :
add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp
COMMAND echo "/* this file is empty */" >
${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp
DEPENDS ${CMAKE_SOURCE_DIR}/myfile.txt )
add_executable(MyTarget main.cpp ${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp )
But this solution is not the most elegant becauseit requires generating of
dummy file which need to be added as input to add_executable.
Also the following works :
add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp
COMMAND echo "/* this file is empty */" >
${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp
DEPENDS ${CMAKE_SOURCE_DIR}/myfile.txt )
add_custom_target(CustomTarget ${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp)
add_dependencies(MyTarget CustomTarget)
But again this creates new target which shows up in my Visual Studio
solution.
So I found the first code with OBJECT_DEPENDS most acceptable. Can someone
through light on this and say why it does not works? What I am doing wrong?
Thanks for the help
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