o Compiler Error: CC -DHAVE_CONFIG_H -I. -I. -I.. -I/users/toollib/include/python2.0 -I/users/pyqt/install/sip-3.2.1/include -I/users/pyqt/install/qt-x11-commercial-3.0.4/include -I/usr/openwin/include -c qtcmodule.cpp -KPIC -DPIC -o qtcmodule.o "sipqtProxyqt.h", line 113: Error: Multiple declaration for sipProxyqt::proxySlot(int). "qtcmodule.cpp", line 5393: Error: sipProxyqt::proxySlot(int) already had a body defined. This occurs because the Sun Workshop C++ 4.2 compiler (and the Sun Forte C++ 6.x compiler with -compat) can not distinguish between 'bool' and 'int' types in overloaded method signatures and issues a compiler error. In this case bool is declared in qt/include/qglobal.h as 'typedef int bool;'. To workaround this '#if 0' out the the declaration and body of 'proxySlot(bool)' in PyQt/qt/sipqtProxyqt.h and PyQt/qt/qtcmodule.cpp. This resolves the compiler error but breaks any 'sig(bool)' type signals. To workaround this, save the PyQt/qt/sipqtProxyqt.moc generated after fixing the compiler error and add the following bits of code: ... static const QUParameter param_slot_42[] = { { 0, &static_QUType_bool, 0, QUParameter::In } }; static const QUMethod slot_42 = {"proxySlot", 1, param_slot_42 }; static const QMetaData slot_tbl[] = { ... { "proxySlot(bool)", &slot_42, QMetaData::Public } }; metaObj = QMetaObject::new_metaobject( "sipProxyqt", parentObject, slot_tbl, 43, ... case 42: proxySlot(static_QUType_bool.get(_o+1)); break; You will need to comment out the line in PyQt/qt/Makefile that re-generates PyQt/qt/sipqtProxyqt.moc with moc to avoid the above changes from being overwritten. In order to test that everything has been done correctly, create a toggle button and connect it's 'toggled(bool)' signal to a python slot, if it works, your done!