generate synthetic events for poll/select/ppoll/pselect/epoll (devel)

 This library uses eventfd/VPOLL if provided by the kernel or the vpoll device
 otherwise it implements an emulator (providing only `EPOLLIN`, `EPOLLOUT`
 and a non standard version of EPOLLHUP/EPOLLRDHUP).
 .
 This package contains the development files used for C programs.