quanah@zimbra.com writes:

Actually, the issue seems to be name changes in the header files under BSD. This causes TIOCNOTTY to end up being undefined.

That would not give the error message shown in http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg776021.html:

build/buildd-openldap_2.4.21-1-kfreebsd-amd64-VWAqZY/openldap-2.4.21/libraries/liblutil/detach.c:131:7: error: missing binary operator before token "long"

Line 131 is "#elif TIOCNOTTY". There's no 'long' there is TIOCNOTTY is undefined, it'd just evaluate to #elif 0. So my guess is that TIOCNOTTY somewhere is defined to expand to an expression involving a (long) cast.