I was trying to build the MySQL adapter so I could use my Mac OS X Zope with MySQL, but I get this when I run python setup.py install: running install running build running build_py not copying CompatMysqldb.py (output up-to-date) not copying _mysql_exceptions.py (output up-to-date) not copying MySQLdb/__init__.py (output up-to-date) not copying MySQLdb/converters.py (output up-to-date) not copying MySQLdb/connections.py (output up-to-date) not copying MySQLdb/cursors.py (output up-to-date) not copying MySQLdb/sets.py (output up-to-date) not copying MySQLdb/times.py (output up-to-date) not copying MySQLdb/constants/__init__.py (output up-to-date) not copying MySQLdb/constants/CR.py (output up-to-date) not copying MySQLdb/constants/FIELD_TYPE.py (output up-to-date) not copying MySQLdb/constants/ER.py (output up-to-date) not copying MySQLdb/constants/FLAG.py (output up-to-date) not copying MySQLdb/constants/REFRESH.py (output up-to-date) not copying MySQLdb/constants/CLIENT.py (output up-to-date) running build_ext building '_mysql' extension skipping _mysql.c (build/temp.darwin-1.4-Power Macintosh-2.1/_mysql.o up-to-date) cc -bundle -undefined suppress build/temp.darwin-1.4-Power Macintosh-2.1/_mysql.o -L/usr/local/lib/mysql -lmysqlclient -lz -o build/lib.darwin-1.4-Power Macintosh-2.1/_mysql.so /usr/bin/ld: -undefined error must be used when -twolevel_namespace is in effect error: command 'cc' failed with exit status 1 Any ideas how to fix it?