anchor.diff:  = Basic Sub-Project
  -
   :toc:
   :toc-placement!:
   
   toc::[]
   
  -[[intro]]
  -Introduction
  -------------
  +# Introduction
   
   This example shows how to setup a CMake project that includes sub-projects. The
   top level CMakeLists.txt calls the CMakeLists.txt in the sub directories to
  
positive.code: add_subdirectory(subbinary)
  ----
  
  [[referencing-sub-project-directories]]
  Referencing Sub-Project Directories
  +++++++++++++++++++++++++++++++++++
  
  When a project is created using the `project()` command, CMake will automatically
  create a number of variables which can be used to reference details about the project.
  
negative.code: )
  ----
  
  # Building the example
  
  [source,bash]
  ----
  