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.

[RoboTact]

How did you come up with this problem? That is, why do you compile this code out of context?

[linhung]

Hi,

This is part of the grogram. The compiler indicates this part is causing the error, so I pasted it on here seeking for help.

[RoboTact]

Brilliant.

add

#define mbs_yysbuf

to get rid of it.

[linhung]

Brilliant.

add

#define mbs_yysbuf

to get rid of it.

Shouldnt I use #define mbs_yysbuf something, what should I put for something??

[Andrew Hain]

The define you want is:

#define YY_PROTO (proto) proto

This is a workround for old C compilers that did not allow you to declare the types of arguments to functions. There was actually never any need for it after #ifdef __cplusplus, but the author of your header file probably cut and pasted a definition.

Hope that helps.

[Viorel]

Shouldnt I use #define mbs_yysbuf something, what should I put for something??

Try one of this:

#define mbs_yysbuf // suggested by RoboTact

#define mbs_yysbuf __stdcall

#define mbs_yysbuf __cdecl

#define mbs_yysbuf __fastcall

#define mbs_yysbuf __thiscall

or any of above in combination with __declspec(import), like this:

#define mbs_yysbuf __declspec(import) __cdecl

[Andrew Hain]

[QUOTE=Andrew Hain]The define you want is:

#define YY_PROTO (proto) proto

[QUOTE]

That should of course read:

#define YY_PROTO(proto) proto

without a space before the ( .

[linhung]

Thanks for the reply, now I am facing two new errors, and I believe they are related.

I am getting two of the following error,
talk_ll.c(4376): error C2375: 'input' : redefinition; different linkage
talk_ll.c(6150): error C2375: 'input' : redefinition; different linkage

The program around line 4376 is

#ifndef YY_NO_INPUT
    #ifdef __cplusplus
        static int mbs_yyinput YY_PROTO(( void ));
  #else
        static int input YY_PROTO(( void ));  <----   this is line 4376
    #endif
#endif

The program around line 6150 is

#ifdef __cplusplus
     static int mbs_mbs_yyinput()
#else
     static int input()
#endif
{  <<---------  This is line 6150, but I believe the problem is coming from the above part

// This is middle code, but I don't think its important with the problem I am encoutering. 
}

Basically, I think the problem might be the name of both parts are defined as "input". However, I cannot change anything inside this file (talk_ll.c) because it is directly coming from FLEX, the only file I can change is the header file (like, add define, add functions and stuff).

I tried to add

static int input();

into the header file, and that reduced to 1 error, saying
talk_ll.c(6150): error C2084: function 'int input()' already has a body

Does anyone know how to solve this?