First, install the sasl lib (not gsasl).
Second, configure options for Open LDAP:
LD_LIBRARY_PATH="/usr/local/lib/sasl2:/usr/local/BerkeleyDB.4.4/lib" LDFLAGS="-L/usr/local/lib/sasl2 -L/usr/local/BerkeleyDB.4.4/lib" CPPFLAGS="-I/usr/local/include/sasl -I/usr/local/BerkeleyDB.4.4/include " ./configure --enable-bdb --enable-ldbm --enable-ldap --enable-meta --enable-crypt --with-cyrus-sasl
Then, compile
make depend
make