title: debug makefile project in eclipse
body: <p>I have import a "existing code as makefile project" project in eclipse.
  I want to debug in eclipse such as I can make breakpoint or step in step out the code.
  If I directly debug the project the eclipse say there are no source code for XXX.cpp, so that I can not debug.</p>
  
  <p>How should I change the makefile to debug in the eclipse?</p>