Hello all, With the introduction of Group Lock in release 2.1, the IOCP implementation/build of Windows is broken. The linker fails with unresolved external with pj_ioqueue_register_sock2 (the new one includes the grp-lock). In the past it was possible to build the win32 PJSIP in two flavors (by either enable one of them): - ioqueue_select.c (using select() ) or - ioqueue_winnt.c (using IOCP) The build with ioqueue_winnt is remarkable more efficient when having many channels active. With regards, Eize Slange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20141208/3473a42c/attachment.html>