build errors on MacOSX

My build of postgresql-8.1.0 is failing on MacOSX. Following the
INSTALL file, I passed configure flags for bonjour (what's that?) and
python support. i.e.:

./configure --with-bonjour --with-python

My invocation of make, launched from the postgres account, returns
the following errors:

gcc -no-cpp-precomp -O2 -Wall -Wmissing-prototypes -Wpointer-arith -
Winline -Wendif-labels -fno-strict-aliasing -dynamiclib -
install_name /usr/local/pgsql/lib/libpq.4.dylib -
compatibility_version 4 -current_version 4.1 -multiply_defined
suppress fe-auth.o fe-connect.o fe-exec.o fe-misc.o fe-print.o fe-
lobj.o fe-protocol2.o fe-protocol3.o pqexpbuffer.o pqsignal.o fe-
secure.o md5.o ip.o wchar.o encnames.o noblock.o pgstrcasecmp.o
thread.o -L../../../src/port -lresolv -o libpq.4.1.dylib
/usr/bin/libtool: for architecture: cputype (16777234) cpusubtype (0)
file: -lSystem is not an object file (not allowed in a library)
make[3]: *** [libpq.4.1.dylib] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all] Error 2
make: *** [all] Error 2

OSX v10.4.2
PostgreSQL v8.1.0

Any suggestions?

Thanks
Scott