Compiling Bison-generated parsers with MS VC++?

[Gilles Depeyrot]

Hi Christopher,

I use several Bison/Flex parser/lexers in one of my Windows applications.
This should be absolutely no trouble since both Bison and Flex generate
portable C code. You do have to create an empty unistd.h include file
to get things to compile correctly.


Le (the) 7/10/98 18:04, Christopher David Hundhausen a écrit (wrote) :

>The next step is to get VC++ to compile a bison-generated parser that
>makes use of MFC classes.  Does anyone have any suggestions on
>how to get this to work?  At present, my compilation results in
>the following error messages:
>
>/cygnus/b19/share/bison.simple(327) : error C2065: 'yyerror' : undeclared
>identifier
>/cygnus/b19/share/bison.simple(333) : error C2065: 'alloca' : undeclared
>identifier
>/cygnus/b19/share/bison.simple(387) : error C2065: 'yylex' : undeclared
>identifier

SInce VC++ is a C++ compiler, both yyerror and yylex prototypes have to be
declared before they are used (at the top of the Bison grammar. I don't
recall having a problem with alloca, but I'll try to check that out.

>Once I get the parser to compile, what will I need to do to get
>everything to link properly with my MFC app?  Is there a gnu-win32
>object file that I need to include in the link? Does anyone have any
>advice?

Since you are compiling with VC++, you don't need any Gnu-Win32 libraries.
The VC++ libraries contain all of the C entry points used by Bison and Flex.

Cheers,
Gilles


Gilles Depeyrot                    < mailto:Gilles.Depeyrot@wanadoo.fr >
                             < http://perso.wanadoo.fr/gilles.depeyrot >

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