What is the meaning of comparing char to NULL on AIX (xlc)?
<p>I am porting AIX code to Linux. I encountered some code which compares char to NULL on AIX xlc compiler. The same code gives compile error on Linux. </p>

<p>There is code which compares double with NULL ( d != NULL).</p>

<p>Could somebody explain the semantics of comparing char or double to NULL on AIX(xlc). </p>