building 1.2.11 on Mac OS X

[Jens Vagelpohl <jens@digicool.com>]

i am getting the following rather strange results:

***
[statler:ldap-pfx/src/openldap-1.2.11] root# ./configure --host=pmac-bsd
checking for a BSD compatible install... /usr/bin/install -c

<snip snip>

checking for tempnam... yes
checking declaration of sys_errlist... yes
creating ./config.status
creating Makefile
sed: 31: conftest.s1: unescaped newline inside substitute pattern
creating doc/Makefile
***

this same sed error is shown for every single Makefile the configure script
is trying to build and they all end up having zero length.

has anyone seen this before and knows how to overcome it?

jens