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The Yacc library contains default implementations of the
yyerror
and main
functions. These default
implementations are normally not useful, but POSIX requires
them. To use the Yacc library, link your program with the
-ly option. Note that Bison’s implementation of the Yacc
library is distributed under the terms of the GNU General
Public License (see Copying).
If you use the Yacc library’s yyerror
function, you should
declare yyerror
as follows:
int yyerror (char const *);
The int
value returned by this yyerror
is ignored.
The implementation of Yacc library’s main
function is:
int main (void) { setlocale (LC_ALL, ""); return yyparse (); }
so if you use it, the internationalization support is enabled (e.g., error
messages are translated), and your yyparse
function should have the
following type signature:
int yyparse (void);