Merge pull request #3153 from pijyoi/autoconf_wepoll

Problem: not able to use wepoll in configure script

Makefile.am

@@ -257,6 +257,11 @@ src_libzmq_la_SOURCES = \
 	src/zap_client.hpp \
 	src/zmq_draft.h
 
+if USE_WEPOLL
+src_libzmq_la_SOURCES += \
+	external/wepoll/wepoll.c
+endif
+
 if USE_TWEETNACL
 src_libzmq_la_SOURCES += \
 	src/tweetnacl.c \

acinclude.m4

@@ -1052,7 +1052,7 @@ AC_DEFUN([LIBZMQ_CHECK_POLLER], [{
     # Allow user to override poller autodetection
     AC_ARG_WITH([poller],
         [AS_HELP_STRING([--with-poller],
-        [choose I/O thread polling system manually. Valid values are 'kqueue', 'epoll', 'devpoll', 'pollset', 'poll', 'select', or 'auto'. [default=auto]])])
+        [choose I/O thread polling system manually. Valid values are 'kqueue', 'epoll', 'devpoll', 'pollset', 'poll', 'select', 'wepoll', or 'auto'. [default=auto]])])
 
     # Allow user to override poller autodetection
     AC_ARG_WITH([api_poller],
@@ -1134,6 +1134,12 @@ AC_DEFUN([LIBZMQ_CHECK_POLLER], [{
                     poller_found=1
                 ])
             ;;
+            wepoll)
+                # wepoll can only be manually selected
+                AC_MSG_NOTICE([Using 'wepoll' I/O thread polling system])
+                AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_EPOLL, 1, [Use 'epoll' I/O thread polling system])
+                poller_found=1
+            ;;
         esac
         test $poller_found -eq 1 && break
     done
@@ -1146,6 +1152,8 @@ AC_DEFUN([LIBZMQ_CHECK_POLLER], [{
 	if test "x$with_api_poller" == "xauto"; then
 		if test $poller == "select"; then
 			api_poller=select
+		elif test $poller == "wepoll"; then
+			api_poller=select
 		else		
 			api_poller=poll
 		fi

configure.ac

@@ -507,6 +507,8 @@ AM_CONDITIONAL(USE_LIBSODIUM, test "$curve_library" = "libsodium")
 AM_CONDITIONAL(USE_TWEETNACL, test "$curve_library" = "tweetnacl")
 AM_CONDITIONAL(HAVE_CURVE, test "x$curve_library" != "x")
 
+AM_CONDITIONAL(USE_WEPOLL, test "$poller" = "wepoll")
+
 # build using pgm
 have_pgm_library="no"