With the LSB (Linux Standard Base) headers for libcModules/selectmodule.c fails to compile because we have code that uses EPOLLRDNORM, EPOLLRDBAND, EPOLLWRNORM and EPOLLMSG without first checking that they are defined.The patch wraps the five uses of PyModule_AddIntMacro in #ifdefs, following exactly the same pattern that is used for the POLLRDNORM, POLLRDBAND, POLLWRNORM, POLLMSG macros 30 lines earlier in selectmodule.c.The only documentation I can find for these five macros from Linux is (a) in the Python documentation for the select module!  (https://docs.python.org/3.4/library/select.html#edge-and-level-trigger-polling-epoll-objects) and (b) on this StackOverflow answer:http://stackoverflow.com/a/27143672/2209313.They are not described onhttp://man7.org/linux/man-pages/man2/epoll_ctl.2.html (where the rest of the EPOLL macros are defined), nor athttp://linux.die.net/man/4/epoll.  As explained by the StackOverflow answer they actually are described (indirectly) byhttp://man7.org/linux/man-pages/man2/poll.2.html.Nor are these macros in the Linux Foundation's LSB database:http://www.linuxbase.org/navigator/browse/headgroup.php?cmd=list-byheadgroup&HGid=1398.Obviously almost all modern Linuxes have these macros, so we should keep them, but we should also compile with the LSB headers (since compiling and linking against the LSB SDK (http://www.linuxfoundation.org/collaborate/workgroups/lsb/group) is one of the easiest ways to produce a Python binary that will actually run on most important supported Linux distros (e.g., RHEL 5).http://man7.org/linux/man-pages/man7/epoll.7.html,