为什么我编译的时候出错?
/usr/include/wx/cursor.h: In constructor
`wxBusyCursorSuspender::wxBusyCursorSuspender()':
/usr/include/wx/cursor.h:46: `wxIsBusy' undeclared (first use this function)
/usr/include/wx/cursor.h:46: (Each undeclared identifier is reported only once
for each function it appears in.)