https://sourceforge.net/tracker/?func=detail&aid=3546447&group_id=97492&atid=618177

--- flex/tests/test-bison-yylloc/main.c

+++ flex/tests/test-bison-yylloc/main.c

@@ -24,8 +24,6 @@

 #include "parser.h"

 #include "scanner.h"

-extern int testparse(yyscan_t);

-

 int main ( int argc, char** argv )

 {

     yyscan_t scanner;

--- flex/tests/test-bison-yylloc/parser.y

+++ flex/tests/test-bison-yylloc/parser.y

@@ -21,6 +21,8 @@

  * PURPOSE.

  */

+%parse-param { void* scanner }

+

 /* 

    How to compile:

    bison --defines --output-file="parser.c" --name-prefix="test" parser.y

@@ -32,10 +34,8 @@

 #include "config.h"

 #define YYERROR_VERBOSE 1

-#define YYPARSE_PARAM scanner

 #define YYLEX_PARAM   scanner

-int yyerror(char* msg);

 extern int testget_lineno(void*);

@@ -89,7 +89,7 @@ line:

 %%

-int yyerror(char* msg) {

+int yyerror(void* scanner, char* msg) {

     fprintf(stderr,"%s\n",msg);

     return 0;

 }

--- flex/tests/test-bison-yylval/main.c

+++ flex/tests/test-bison-yylval/main.c

@@ -24,8 +24,6 @@

 #include "parser.h"

 #include "scanner.h"

-extern int testparse(yyscan_t);

-

 int main ( int argc, char** argv )

 {

     yyscan_t scanner;

--- flex/tests/test-bison-yylval/parser.y

+++ flex/tests/test-bison-yylval/parser.y

@@ -25,6 +25,7 @@

    How to compile:

    bison --defines --output-file="parser.c" --name-prefix="test" parser.y

  */

+%parse-param { void* scanner }

 %{

 #include <stdio.h>

 #include <stdlib.h>

@@ -32,11 +33,8 @@

 #include "config.h"

 #define YYERROR_VERBOSE 1

-#define YYPARSE_PARAM scanner

 #define YYLEX_PARAM   scanner

-int yyerror(char* msg);

-

 /* A dummy function. A check against seg-faults in yylval->str. */

 int process_text(char* s) {

@@ -76,7 +74,7 @@ starttag:  LT      TAGNAME GT { process_text($2); free($2);} ;

 endtag:    LTSLASH TAGNAME GT { process_text($2);free($2);} ;

 %%

-int yyerror(char* msg) {

+int yyerror(void* scanner, char* msg) {

     fprintf(stderr,"%s\n",msg);

     return 0;

 }