title: Error: token "@" is not valid in preprocessor expressions
body: <p>Can anyone tell me what would be the cause of the error</p>
  
  <p><code>/mysql_com.h:306:5: error: token @ is not valid in preprocessor expressions</code> </p>
  
  <p>while this mysql_com.h file does not contain any  <strong>@</strong>.  So how can I fix this error.</p>
  
  <p>I think it's similar to the error when we open windows edited file in linux, then at that time <strong>^V appers</strong>. But in this case <strong>@</strong> is not anywhere in the file.</p>
  
  <p>Thanks in advance. Looking for your kind response.</p>