The intent:
Install Samba on OpenBSD to act as a "worm catcher".  Since the environment is
native-mode Windows 2000, this necessitates building the Active Directory modules.

The system:
OpenBSD 3.4 i386
gcc version 2.95.3 20010125 (prerelease, propolice)
GNU Make 3.80
autoconf (GNU Autoconf) 2.57
automake (GNU automake) 1.4-p6
libiconv 1.8
cvs checkout 14Nov2003 0248 UTC

The configure options (OpenBSD placement mostly):
./configure \
--prefix=/usr \
--sbindir=/usr/libexec \
--sysconfdir=/etc/samba \
--localstatedir=/var \
--libdir=/usr/lib/samba \
--infodir=/usr/share/info \
--mandir=/usr/share/man \
--disable-cups \
--with-privatedir=/etc/samba \
--with-lockdir=/var/spool/samba \
--with-piddir=/var/run \
--with-swatdir=/usr/share/swat \
--with-configdir=/etc/samba \
--with-ads \
--with-utmp \
LDFLAGS="-L/usr/local/lib" \
CPPFLAGS="-I/usr/local/include -I/usr/include/kerberosV"

The error:
Compiling libsmb/clikrb5.c
libsmb/clikrb5.c: In function `create_kerberos_key_from_string':
libsmb/clikrb5.c:92: syntax error before `eblock'
libsmb/clikrb5.c:99: `eblock' undeclared (first use in this function)
libsmb/clikrb5.c:99: (Each undeclared identifier is reported only once
libsmb/clikrb5.c:99: for each function it appears in.)
libsmb/clikrb5.c:100: warning: passing arg 3 of `krb5_string_to_key' from
incompatible pointer type
libsmb/clikrb5.c:100: warning: passing arg 4 of `krb5_string_to_key' from
incompatible pointer type
libsmb/clikrb5.c:100: warning: passing arg 5 of `krb5_string_to_key' from
incompatible pointer type
libsmb/clikrb5.c: In function `krb5_princ_component':
libsmb/clikrb5.c:405: warning: assignment discards qualifiers from pointer
target type
gmake: *** [libsmb/clikrb5.o] Error 1

The Diagnosis:
The "eblock" definition only exists in the MIT distribution of Kerberos (krb5.h).

To build successfully in OpenBSD with ADS, the Heimdal version must be
installed, which does not have the "eblock" setting defined.