How to read this, it seems like it has two types

[linhung]

Here is the part thats causing the error

#ifndef YY_SKIP_mbs_yysbuf
#ifdef __cplusplus
extern "C" int mbs_yysbuf YY_PROTO(( void ));
#else
extern int mbs_yysbuf YY_PROTO(( void ));
#endif
#endif


Particularly, iam having trouble with

extern int mbs_yysbuf YY_PROTO(( void ));

I am not sure how do define mbs_yysbuf in my heaer file. If i do not define, there will be an error saying

legacy error LNK2019: unresolved external symbol _mbs_yysbuf referenced in function _yylex

Is int the type of YY_PROTO(( void )) or is mbs_yysbuf the type of YY_PROTO(( void ))??

i believe the resolution is to define mbs_yysbuf in the header file, but i am not sure how to define it.