title: What does it mean to say that C was compiled in C?
body: <p>I've seen stuff like this written... <em>C was written in C</em>, or <em>ABAP was written in ABAP</em>..</p>
  
  <p>I've even seen <a href="https://forums.sme.sap.com/message.jspa?messageID=6603581" rel="nofollow" title="one guy">one guy</a> saying that this is one of the criteria to sort languages into <em>true</em> programming languages.</p>
  
  <p>I'd like someone to explain to me what this means.</p>
  
  <p>Thanks in advance.</p>
  
  <p>EDIT:Changed title from: "<em>C was made using C</em>" to "<em>C was <strong>compiled</strong> using C</em>".</p>