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<title>Issue 3920: Bad footnotes claiming external linkage for entities defined as macros</title>
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<p><em>This page is a snapshot from the LWG issues list, see the <a href="lwg-active.html">Library Active Issues List</a> for more information and the meaning of <a href="lwg-active.html#New">New</a> status.</em></p>
<h3 id="3920"><a href="lwg-active.html#3920">3920</a>. Bad footnotes claiming external linkage for entities defined as macros</h3>
<p><b>Section:</b> 16.4.5.3.4 <a href="https://wg21.link/extern.names">[extern.names]</a> <b>Status:</b> <a href="lwg-active.html#New">New</a>
 <b>Submitter:</b> Alisdair Meredith <b>Opened:</b> 2023-04-12 <b>Last modified:</b> 2023-05-24</p>
<p><b>Priority: </b>3
</p>
<p><b>View all issues with</b> <a href="lwg-status.html#New">New</a> status.</p>
<p><b>Discussion:</b></p>
<p>
16.4.5.3.4 <a href="https://wg21.link/extern.names">[extern.names]</a> p1 and p2 reserve certain names with external linkage to the implementation.
<p/>
Each paragraph has a footnote, stating that such names include <code>errno</code>, <code>setjmp(jmpbuf)</code>, and 
<code>va_end(va_list)</code>. These names are all defines as macros, not entities with that name and external linkage.
<p/>
Are these footnotes intended by a normative extension to the list of reserved names with external linkage?  
If so, they should be promoted to the main text, as they are no longer a note.
<p/>
If they intend to serve as examples, it is not clear to me what principle is being shown, as there are many 
other macros that might be in a similar position, and I do not see how to follow the a principle that is being 
noted, and presumably follows from the normative text.
<p/>
I <em>think</em> this is intended to be a normative extension to the set of reserved names with external linkage, 
is limited to exactly those three named macros, so should be promoted as a non-note into the main text, but want 
to hear what LWG consensus is before drafting wording.
</p>

<p><i>[2023-05-24; Reflector poll]</i></p>

<p>
Set priority to 3 after reflector poll.
</p>



<p id="res-3920"><b>Proposed resolution:</b></p>





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