https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100180
--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:530a8f5c824f34a72ad4380d150225905198845b commit r11-8908-g530a8f5c824f34a72ad4380d150225905198845b Author: Jonathan Wakely <jwak...@redhat.com> Date: Fri Apr 23 13:38:05 2021 +0100 libstdc++: Allow net::io_context to compile without <poll.h> [PR 100180] This adds dummy placeholders to net::io_context so that it can still be compiled on targets without <poll.h>. libstdc++-v3/ChangeLog: PR libstdc++/100180 * include/experimental/io_context (io_context): Define dummy_pollfd type so that most member functions still compile without <poll.h> and struct pollfd. (cherry picked from commit 0e1e7b77904f1fe2a6dbfe84bb4fc026584ba480)