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";
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<div class='path'>path: <a href='/guix/log/?id=a92a93c9a47f26de8aed907e573aee7aed5fa92f'>root</a>/<a href='/guix/log/gnu?id=a92a93c9a47f26de8aed907e573aee7aed5fa92f'>gnu</a>/<a href='/guix/log/gnu/services?id=a92a93c9a47f26de8aed907e573aee7aed5fa92f'>services</a>/<a href='/guix/log/gnu/services/desktop.scm?id=a92a93c9a47f26de8aed907e573aee7aed5fa92f'>desktop.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/gnu/services/desktop.scm?id=a92a93c9a47f26de8aed907e573aee7aed5fa92f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-02-07 11:51:02 +0800'>2020-02-07</span></td><td><a href='/guix/commit/gnu/services/desktop.scm?id=daec54f062a703ac0e4e3b4361e5a0cf7309053a'>services: inputattach: Fix broken baud rate option.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/desktop.scm (inputattach-shepherd-service): Use "--baud" for
setting the baud-rate.

Signed-off-by: 宋文武 &lt;iyzsong@member.fsf.org&gt;
</span></span></td><td>Tim Gesthuizen</td></tr>
<tr><td><span title='2020-01-21 15:01:46 +0100'>2020-01-21</span></td><td><a href='/guix/commit/gnu/services/desktop.scm?id=b2f948be9f815582a49bd80a9594a881d7d1a56e'>services: sane: Create the "scanner" account.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/desktop.scm (%sane-accounts, sane-service-type): New
variables.
(%desktop-services): Use SANE-SERVICE-TYPE instead of 'simple-service'.
* doc/guix.texi (Desktop Services): Document 'sane-service-type'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-01-20 18:46:07 +0100'>2020-01-20</span></td><td><a href='/guix/commit/gnu/services/desktop.scm?id=19b310901c9d798722e6be849e335efc1fee0384'>services: Add "sane" service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/desktop.scm (%desktop-services): Add "sane" service.
</span></span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2020-01-11 18:18:51 +0100'>2020-01-11</span></td><td><a href='/guix/commit/gnu/services/desktop.scm?id=71e33e32fcedbd0aaafda4fd548fb8443064253c'>services: Add pulseaudio to %desktop-services.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/38172&gt;.
Reported by raingloom &lt;raingloom@riseup.net&gt;.

* gnu/services/desktop.scm (%desktop-services): Add pulseaudio service.

Signed-off-by: Marius Bakke &lt;mbakke@fastmail.com&gt;
</span></span></td><td>Leo Prikler</td></tr>
<tr><td><span title='2019-12-04 18:16:08 +0100'>2019-12-04</span></td><td><a href='/guix/commit/gnu/services/desktop.scm?id=fe7b59c6b1200fcc10bda954c2370eca63af5299'>services: Add GNOME Keyring service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/desktop.scm: (&lt;gnome-keyring-configuration&gt;): New record type.
(pam-gnome-keyring): New procedure.
(gnome-keyring-service-type): New variable.
* doc/guix.texi (Desktop Services): Document it.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Leo Prikler</td></tr>
<tr><td><span title='2019-11-30 23:50:40 +0100'>2019-11-30</span></td><td><a href='/guix/commit/gnu/services/desktop.scm?id=27b77228cf06d88b25185124928df0dd43d56b80'>services: Add polkit-wheel-service to %desktop-services.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/desktop.scm: (%desktop-services): Add polkit-wheel-service.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Leo Prikler</td></tr>
<tr><td><span title='2019-11-30 23:50:40 +0100'>2019-11-30</span></td><td><a href='/guix/commit/gnu/services/desktop.scm?id=7f25ff10e1c821da84c641e7f6c01c34a2ebe12e'>services: Add polkit-wheel-service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/desktop.scm: (polkit-wheel): New variable.
(polkit-wheel-service): New service.
* doc/guix.texi: Document polkit-wheel-service.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Leo Prikler</td></tr>
<tr><td><span title='2019-11-01 12:23:45 +0100'>2019-11-01</span></td><td><a href='/guix/commit/gnu/services/desktop.scm?id=5afa23e1805e68a7cd9adb2145094dcd29bf67d6'>services: colord: Deprecate 'colord-service' procedure.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/desktop.scm (colord-service-type)[default-value]: New field.
(colord-service): Define with 'define-deprecated'.
(%desktop-services): Use 'colord-service-type' instead of 'colord-service'.
* doc/guix.texi (Desktop Services): Adjust accordingly.
</span></span></td><td>Ludovic Courtès</td></tr>