How to resolve MAC OS _XOPEN_SOURCE error in Xcode while compiling?
<p>I am developing application for .Epub extension file reader.I have source code available.
But while compiling the code i am getting below error :</p>

<pre><code>#error The deprecated ucontext routines require _XOPEN_SOURCE to be defined
</code></pre>

<p>I have gone through the internet for different kind of help, but not able to find exact solution.</p>

<p>Can anybody having any idea which kind of error it is?</p>

<p>How to resolve the above error in Xcode ?</p>

<p>please help out with any resolution for it.</p>

<p>Thanks.</p>
