From: Sig <rw@...>
Date: 2006-09-22T02:35:09+09:00
Subject: Re: Ruby and Borland C++

Paul Lutus wrote:
> Sig wrote:
> 
> / ...
> 
>> If I create pure C project it works just fine. Any ideas how can I get
>> it work under C++ project? I've tried to figure out what causes the
>> error and looks like it's coming from win32.h where stdio.h functions
>> are redeclared.
> 
> Just based on what you have posted, you need to wrap the ruby.h header
> content the same way the C and C++ headers are wrapped.
> 
> To avoid double-reading, a typical header file will look like this:
> 
> #ifndef UNIQUE_HEADER_NAME
> #define UNIQUE_HEADER_NAME
> 
> # header content goes here
> 
> #endif
> 
> This arrangement prevents multiple reads of the same header file.
> 
> According to the error messages, it seems that the ruby.h file contains
> content already read and defined in other header files. One solution is to
> borrow the special defined name from a conflicting header file, and say:
> 
> #ifndef UNIQUE_HEADER_NAME
> #define UNIQUE_HEADER_NAME
> #include ruby.h
> #endif
> 
> This may be too simple a solution, but it is reasonably clear that a classic
> C/C++ multiple-header-read is happening. You may have to work out a more
> complex solution than this example.
> 

Thanks Paul for you reply, still I can not solve the problem. I think 
this part from win32.h causes the error:

#if defined(__cplusplus)
extern "C++" {
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <direct.h>
#include <process.h>
#include <time.h>
#include <math.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef HAVE_SYS_UTIME_H
# include <sys/utime.h>
#else
# include <utime.h>
#endif
#include <io.h>
#include <malloc.h>

#if defined(__cplusplus)
}
#endif


Looks like the same headers are defined twice as C++ and as C. Any other 
suggestions how to fix that? If I try to redefine them as C I get errors 
that types defined in stdio.h don't exist.