From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-02-26T18:22:27+09:00
Subject: Re: Embedding Ruby in C code

On Wed, Feb 26, 2003 at 03:54:44PM +0900, Edward Wilson wrote:
> Paul Brannan <pbrannan@atdesk.com> wrote in message news:<20030225151304.GZ22892@atdesk.com>...
> > On Tue, Feb 25, 2003 at 04:32:02PM +0900, Edward Wilson wrote:
> > >  * I downloaded the 1.8 source straight from CVS 
> > >  * and the following will not compile.
> > 
> > What error message do you get?
> > 
> > Paul
> 
> Thanks for asking:
> 
> I'm getting the following error:
> 
> `undefined reference to ruby_init()'
> 
> My code again is:
> 
> #include "ruby.h"
> 
> int main(int argc, char **argv)
> {
>   ruby_init();
>   return 0;
> }
>
>
> I have gotten past this several times with ruby 1.6.7 and others, this
> is the first time I have gotten this error.  This is the first time I
> have built with ruby 1.8.

If I'm right it compiles OK but you get the problem when linking
(although it can be done in a single step...)

batsman@tux-chan:/tmp$ cat tst.c
#include "ruby.h"

int main(int argc, char **argv)
{
  ruby_init();
  return 0;
}
batsman@tux-chan:/tmp$ gcc -I /usr/lib/ruby/1.6/i386-linux/ -o tst tst.c
/tmp/cc7Gey6B.o(.text+0x7): In function `main':
: undefined reference to `ruby_init'
collect2: ld returned 1 exit status
batsman@tux-chan:/tmp$ gcc -I /usr/lib/ruby/1.6/i386-linux/ -o tst tst.c -lruby
batsman@tux-chan:/tmp$ ./tst
batsman@tux-chan:/tmp$ 

[s/1.6/1.8/g above]

I would suggest that you not assume systematically that things are broken ;-)

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