Re: C parser Can't be Linked to C++ Driver

[Philip Herron]

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Evan Carew wrote:
> I'm trying something not found in any of the manuals or the
> O'Reilly books. I'm trying to create a C lexer and parser (mainly
> because C++ isn't really supported all that well yet), then link
> them in with my C++ driver routine. My problem is that I am having
> trouble getting my linker to recognize the yyparse() function found
> in my parser.tab.c file. This is rather embarrassing as it
> shouldn't be a problem. I can see the stupid symbol in the nm
> listing for the parser object file, but I can't seem to get g++ to
> accept it. <sigh>.
>
> If anyone has gotten past this issue, I'd appreciate a pointer so I
>  can get past my senior moment.
>
> Thanks, Evan
Hey Evan

Hmm this sounds interesting, sometimes mixing C and C++ you need to do
stuff like:

#ifdef __cplusplus
 extern "C" {
#endif
.....
#ifdef __cplusplus
}
#endif

But you would use that if you have C++ code you want to call from C,
http://www.parashift.com/c++-faq-lite/mixing-c-and-cpp.html

But are you using yacc -d? And including the generated header file? I
cant remember what they are called by default any more been using
automakes ylwrap for too long :)

But yyparse isn't declared in that prototype in my lexer what i do is:

int parse( FILE* fin )
{
  yyin= fin;
  prompt();
  int err= yyparse();
  return err;
}

fin could be stdin or a fopen'd file :) But in the top of the lexer i
declare the prototype yyparse() and it works.

%{
.......
#include "libparser_la-parser.h"

#include "crules.h"
#include "symbols.h"

extern int yyparse( );
%}

Not sure if any of that helps :)

- --Phil
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