CMake: What use of "make depends"?

Question

One of the goals generated by cmake is depend :

Below are some of the valid goals for this makefile:
... all (default if no target is specified)
... clean
... depend
... edit_cache
... rebuild_cache

What will be the effect of doing make depend?

Answer 1

This creates dependency rules for some Makefile targets. See http://en.wikipedia.org/wiki/Makedepend