title: What is this line of shell script doing
body: <p>This question may be pretty simple, but i dont find exact answers ..</p>
  
  <p>in shell script i have a line like this,</p>
  
  <pre><code>export CFLAGS=" -w -Iinc/ -Isrc/"
  </code></pre>
  
  <p>I dont know what is that <code>-w</code> and <code>-I</code> options doing here??</p>
  
  <p>All i know is this line includes the directories <code>inc</code> and <code>src</code></p>
  
  <p>Any help would be great</p>