From: Eric Wong <normalperson@...>
Date: 2009-12-30T05:27:28+09:00
Subject: Re: ERRORs trying to install ruby-ldap on CentOS

Xeno Campanoli <xeno.campanoli@gmail.com> wrote:
> Okay, I found the sequence in the README.  Sorry.  It still fails, and I 
> tried putting the preprocessor stuff you recommend both before and after 
> the two initial includes in the file, with these results:
>
> -mtune=generic -Wall -fno-strict-aliasing  -fPIC  -c misc.c
> misc.c: In function ‘rb_ldap_get_apiinfo’:
> misc.c:63: warning: implicit declaration of function ‘RARRAY_LEN’
> misc.c:67: warning: implicit declaration of function ‘RARRAY_PTR’
> misc.c:67: error: subscripted value is neither array nor pointer
> make: *** [misc.o] Error 1
> #
> ---snip---

OK, we got farther since it's no longer barfing on RSTRING_*
but RARRAY_* instead.

> I don't see any other of these R.*_ preprocessor functions (well, there 
> is an RB.*something, but hopefully) so that maybe if you can give me an 
> appropriate #define for that one it might work...????

So just add these now, and hopefully there aren't more
incompatibilities....

  #ifndef RARRAY_PTR
  #  define RARRAY_PTR(s) (RARRAY(s)->ptr)
  #endif
  #ifndef RARRAY_LEN
  #  define RARRAY_LEN(s) (RARRAY(s)->len)
  #endif

If upgrading your version of Ruby isn't an option for you, I suggest
grabbing the latest 1.8.7 source and taking any other macros you might
need from the headers.

-- 
Eric Wong