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Yes, but this has the nasty effect that the pre-build step will ALWAYS execute.
This will ALWAYS create new versions of the .cpp/.h files
This will ALWAYS cause a recompile, possibly of everything...

As Mr Viggy said. the simple solution is to run the build once, and add the .cpp's and .h files once.
You can then make the .cpp file dependant on whatever file(s) is(are) serving as 'input' to...