The following reply was made to PR pkg/29029; it has been noted by GNATS.

From: "Jesse Off" <joff@embeddedARM.com>
To: "Johnny C. Lam" <jlam@netbsd.org>, <gnats-bugs@netbsd.org>
Cc: <pkg-manager@netbsd.org>, <pkgsrc-bugs@netbsd.org>
Subject: Re: pkg/29029: bootstrap should USE_BUILTIN.dl=yes in mk.conf for Interix
Date: Thu, 20 Jan 2005 18:06:35 -0700

 Yes, there is a /usr/lib/libdl.so (symlink to 
 /opt/gcc.3.3/lib/libdl.so.3.5).  That would be a good way to detect it since 
 the header file is in a stranger location /opt/gcc.3.3/include/dlfcn.h. 
 There is also the return value of
 echo "" | gcc -include dlfcn.h -E -
 
 //Jesse Off
 
 ----- Original Message ----- 
 From: "Johnny C. Lam" <jlam@netbsd.org>
 To: <gnats-bugs@netbsd.org>
 Cc: <pkg-manager@netbsd.org>; <pkgsrc-bugs@netbsd.org>
 Sent: Thursday, January 20, 2005 5:46 PM
 Subject: Re: pkg/29029: bootstrap should USE_BUILTIN.dl=yes in mk.conf for 
 Interix
 
 
 > On Fri, Jan 21, 2005 at 12:32:00AM +0000, joff@embeddedARM.com wrote:
 >> Machine: i386
 >> >Description:
 >> Several packages fail to build with a message
 >> "Package X requires dlopen()".  Interix does have dlopen(), just not
 >> in a header file /usr/include/dlopen.h.
 >> >How-To-Repeat:
 >> Try building perl on Interix
 >> >Fix:
 >> Add a line "USE_BUILTIN.dl=yes" to the example mk.conf during pkgsrc
 >> bootstrap or extend detection of builtin dlopen() to a method more
 >> resilent than simply checking for the presence of a /usr/include/dlfcn.h
 >
 > I would rather that we enhance dlopen.builtin.mk to properly detect
 > dlopen() on Interix.  In which header are the dl*() functions declared?
 > Is there a libdl on Interix?
 >
 > Cheers,
 >
 > -- Johnny Lam <jlam@NetBSD.org>
 >
 >