In article <1086714543.916013.5466.nullmailer@yamt.dyndns.org>,
YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp> wrote:
>-=-=-=-=-=-
>
>hi,
>
>here's a simple test case of the binary compatibility problem.
>
>1. compile the attached file on a pre-bind9resolver box.
>	% cc a.c
>	% objdump -x a.out|grep _res
>	08049bc0 g     O .bss   000001bc _res
>	% ./a.out
>	%
>
>2. run it on a post-bind9resolver box.
>	kaeru% objdump -x /lib/libc.so.12.120|grep _res\$
>	000b5240 g     O .bss   00000200 _res
>	kaeru% ./a.out
>	zsh: segmentation fault (core dumped)  ./a.out
>
>YAMAMOTO Takashi
>
>
>-=-=-=-=-=-
>
>#include <sys/types.h>
>#include <netinet/in.h>
>#include <arpa/nameser.h>
>#include <resolv.h>
>
>int
>main()
>{
>	_res.options |= RES_AAONLY;
>	res_init();
>}

Tried this and it works for me:

[6:39pm] 73>objdump -x res | grep -w _res
08049a00 g     O .bss   000001bc _res
[6:39pm] 74>objdump -x /lib/libc.so.12.120 | grep -w _res
000b5240 g     O .bss   00000200 _res
[6:39pm] 75>./res