Re: slapd fails to start up in 2.3.8 and 2.3.9

[Howard Chu <hyc@symas.com>]

Buchan Milne wrote:
> On Monday, 10 October 2005 19:34, Howard Chu wrote:
>   
> > errno 38 is ENOSYS, it seems the epoll_ctl system call is not
> > implemented on your target kernel. You say that running "make test"
> > works though?
> >     
>
> On the build host, which has a 2.6 kernel. The kernel on the target host is 
> 2.4 (which doesn't have epoll).
>
>   
> > That's pretty strange. You'll probably have to set 
> > ac_cv_header_sys_epoll_h = no and rerun configure. The configure script
> > checks that epoll_create() works, strange that it would succeed but
> > epoll_ctl() fails.
> >     
>
> I've changed the package to set ac_cv_header_sys_epoll_h = no when building 
> for a target system with a 2.4 kernel, which has fixed that for me.
>
> However, build-time checks on kernel features may not be the most robust 
> solution.
Ahem. The very nature of autoconf is to perform build-time checks on the 
build machine, for library and kernel features. E.g., all the checks we 
do to see if pthreads, regex, etc. works...

The fact is that you actually have what should be treated as a 
cross-compilation setup. When cross-compiling, configure defaults most 
of these feature tests to "no" anyway, but your problem is how to get 
configure to recognize that it should be in a cross-compile mode, since 
the host *architecture* is the same. In other words, you're trying to do 
something that autoconf isn't designed to handle automatically.

--
 -- Howard Chu
 Chief Architect, Symas Corp.  http://www.symas.com
 Director, Highland Sun        http://highlandsun.com/hyc
 OpenLDAP Core Team            http://www.openldap.org/project/