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<h4 class="subsection">6.54.12 Push/Pop Macro Pragmas</h4>

<p>For compatibility with Microsoft Windows compilers, GCC supports
&lsquo;<samp><span class="samp">#pragma push_macro(</span><var>"macro_name"</var><span class="samp">)</span></samp>&rsquo;
and &lsquo;<samp><span class="samp">#pragma pop_macro(</span><var>"macro_name"</var><span class="samp">)</span></samp>&rsquo;.

     <dl>
<dt><code>#pragma push_macro(</code><var>"macro_name"</var><code>)</code><dd><a name="index-pragma_002c-push_005fmacro-3143"></a>This pragma saves the value of the macro named as <var>macro_name</var> to
the top of the stack for this macro.

     <br><dt><code>#pragma pop_macro(</code><var>"macro_name"</var><code>)</code><dd><a name="index-pragma_002c-pop_005fmacro-3144"></a>This pragma sets the value of the macro named as <var>macro_name</var> to
the value on top of the stack for this macro. If the stack for
<var>macro_name</var> is empty, the value of the macro remains unchanged. 
</dl>

 <p>For example:

<pre class="smallexample">     #define X  1
     #pragma push_macro("X")
     #undef X
     #define X -1
     #pragma pop_macro("X")
     int x [X];
</pre>
 <p>In this example, the definition of X as 1 is saved by <code>#pragma
push_macro</code> and restored by <code>#pragma pop_macro</code>.

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