title: Get include tree of GNU makefiles
body: <p>In an existing GNU Make build system, I'd like to see a tree of the makefile includes.  How may I do this?  Like <a href="https://stackoverflow.com/questions/1226044/do-you-know-tool-building-tree-of-include-files-in-project-file">Do you know tool building tree of include files in project\file?</a> but for GNU Make rather than C and C++.</p>
  
  <p>A related but slightly different capability I'd be interested in: being able to put $(info ...) statements in a makefile and have it print out a backtrace of includes for that info statement.</p>