Taken from Debian:
https://salsa.debian.org/multimedia-team/taopm/-/raw/master/debian/patches/02-fix-parser-yyerror.diff

Description: Use a constant char, dummy comment.
Author: Tiago Bortoletto Vaz <tiago@debian.org>
Last-Update: 2013-04-17
--- a/taoparse/taoparser.yy
+++ b/taoparse/taoparser.yy
@@ -23,7 +23,7 @@
 #include <stdio.h>
 #include "taoparserdefs.h"
 
-int yyerror(char *s);
+int yyerror(const char *s);
 
 //#ifdef LINUX
 int yylex(void);
@@ -2924,7 +2924,7 @@
     } 
 
 
-int yyerror (char *s)
+int yyerror (const char *s)
     {
     parse_error(what_I_expected_here);
     std::cout << "PARSE_FAILED";
6dffced09ecda024e0884e352778c221ad066fd6'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=6dffced09ecda024e0884e352778c221ad066fd6'>refs</a><a class='active' href='/guix/log/doc/build.scm'>log</a><a href='/guix/tree/doc/build.scm?id=6dffced09ecda024e0884e352778c221ad066fd6'>tree</a><a href='/guix/commit/doc/build.scm?id=6dffced09ecda024e0884e352778c221ad066fd6'>commit</a><a href='/guix/diff/doc/build.scm?id=6dffced09ecda024e0884e352778c221ad066fd6'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/doc/build.scm'>
<input type='hidden' name='id' value='6dffced09ecda024e0884e352778c221ad066fd6'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=6dffced09ecda024e0884e352778c221ad066fd6'>root</a>/<a href='/guix/log/doc?id=6dffced09ecda024e0884e352778c221ad066fd6'>doc</a>/<a href='/guix/log/doc/build.scm?id=6dffced09ecda024e0884e352778c221ad066fd6'>build.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/doc/build.scm?id=6dffced09ecda024e0884e352778c221ad066fd6&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-12-13 11:49:15 +0100'>2021-12-13</span></td><td><a href='/guix/commit/doc/build.scm?id=1052ae5f03de931b52c7a638c8e4f8d8d7093af3'>Merge branch 'master' into core-updates-frozen</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-12-13 11:31:53 +0100'>2021-12-13</span></td><td><a href='/guix/commit/doc/build.scm?id=c946e1464d0850190f899d592bb765fa52b804c2'>doc: Handle '&amp;nbsp' when syntax-highlighting HTML.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/build.scm (syntax-highlighted-html)[build](entity-&gt;string): Handle "&amp;nbsp".
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-10-31 14:49:47 +0200'>2021-10-31</span></td><td><a href='/guix/commit/doc/build.scm?id=bc5155b952ae8bdbc56aded4d8d39768b4e2a7d4'>Merge remote-tracking branch 'origin/master' into core-updates-frozen</a></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2021-10-28 21:30:27 +0200'>2021-10-28</span></td><td><a href='/guix/commit/doc/build.scm?id=45b251fd045fe47dd65d42a269508ee50f26565d'>doc: Allow offloading of the expensive derivations.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/build.scm (translated-texi-manuals)
(html-manual, pdf-manual): Pass #:local-build? #f.
</span></span></td><td>Ludovic Courtès</td></tr>