title: Undefined reference to symbol 'sem_post@@GLIBC_2.4
body: <p>I am trying to build a sample code using Eclipse and ARM Sourcery Windows GCC C on Windows 8 machine. 
  When I compile code : 
  I get this error : </p>
  
  <blockquote>
    <p>Undefined reference to symbol 'sem_post@@GLIBC_2.4</p>
  </blockquote>
  
  <p>The error doesn't say any line number or any location about the error, so I don't know which part of the code I should post.
  How can I get rid of this error?
  Thanks.</p>