compiling nginx-0.8.21 fail under linux-2.4.18

[testking]

objs/src/core/ngx_open_file_cache.o: In function `ngx_open_and_stat_file':
/home/box/nginx-0.8.21/src/core/ngx_open_file_cache.c:531: warning: posix_fadvise64 is not implemented and will always fail

Linux nginxbox 2.4.18-19.7.xsmp #1 SMP Thu Dec 12 07:56:58 EST 2002 i686 unknown

it is ok with nginx-0.8.16.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,17810,17810#msg-17810