gnarwl version 3.6.dfsg-6 failed to build on amd64 with GCC-4.6/oneiric

gnarwl version 3.6.dfsg-6 failed to build on amd64 with GCC-4.6/oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2451422

Details about the rebuild:
https://lists.ubuntu.com/archives/ubuntu-devel/2011-April/033042.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2451422/+files/buildlog_ubuntu-natty-amd64.gnarwl_3.6.dfsg-6_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 939 lines into the build log:

/build/buildd/gnarwl-3.6.dfsg/src/dbaccess.c:285: undefined reference to `ldap_value_free'
/build/buildd/gnarwl-3.6.dfsg/src/dbaccess.c:288: undefined reference to `ldap_next_entry'
dbaccess.o: In function `dbLock':
/build/buildd/gnarwl-3.6.dfsg/src/dbaccess.c:136: undefined reference to `gdbm_close'
dbaccess.o: In function `dbClose':
/build/buildd/gnarwl-3.6.dfsg/src/dbaccess.c:163: undefined reference to `gdbm_close'
dbaccess.o: In function `dbDisconnect':
/build/buildd/gnarwl-3.6.dfsg/src/dbaccess.c:209: undefined reference to `ldap_unbind'
collect2: ld returned 1 exit status
make[2]: *** [compile] Error 1
make[2]: Leaving directory `/build/buildd/gnarwl-3.6.dfsg/src'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/build/buildd/gnarwl-3.6.dfsg'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110423-0137
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/gnarwl-3.6.dfsg