Adding dependency to generated files to a single source file?

Code
1

Hi:
In my use case, I have commands at configure time that generates .cpp.inc files from input files, something like :

configure_file(
        "${CMAKE_CURRENT_LIST_DIR}/Input.cpp.in"
        "${CMAKE_CURRENT_BINARY_DIR}/Input.cpp.inc")
# Copy to where Input.cpp lives
file(COPY ....)

And then in my Input.cpp file, I #include "Input.cpp.inc"

This raises a few questions:

  • Input.cpp.inc is not automatically regenerated when Input.cpp.in changes
  • Input.cpp is not recompiled when Input.cpp.in changes
2

P.S.:

  • libInput which contains Input.cpp might not be created yet when this CMakeLists is being run. (Uncontrollable by me)
  • libInput is not created in the same level as current CMakeLists.txt
3

Why not just configure directly into wherever file(COPY) puts the file? That might solve the issue.

4

This looks like that this will change the source directory. You should generally try to avoid that. Maybe adapt the include path instead…