From: Simon Strandgaard <0bz63fz3m1qt3001@...>
Date: 2003-05-09T21:59:05+09:00
Subject: extern "C" of prep_stdio

Im trying to handover a pipe from C++ to ruby.


Im doing this in order to make the functions available to C++.

extern "C" {
	#include <rubyio.h>    // rb_fdopen

	static VALUE prep_stdio(FILE *, int, VALUE);
} // extern "C" 

So far so good.. this compiles without problems.


I want to do the same as in "io.c"
    w = prep_stdio(rb_fdopen(pipes[1], "w"), FMODE_WRITABLE|FMODE_SYNC, rb_cIO);  

But if I try compiling this, then G++ complains about the externed
prep_stdio.. 

> gmake
g++ main.cpp -lc_r -I/home/neoneye/install/language/ruby-1.8.0 /home/neoneye/install/language/ruby-1.8.0/libruby-static.a -lcrypt -Wall #-fpermissive
main.cpp: In function `int main(int, char**)':
main.cpp:116: warning: unused variable `FILE*fd'
/usr/include/g++/streambuf: At top level:
main.cpp:15: `VALUE prep_stdio(FILE*, int, long unsigned int)' used but never
   defined
gmake: *** [all] Fejl 1
>


Is there anyone around which knows how to extern "C" rubys internals ?

--
Simon Strandgaard