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";