Use poll() instead of select() by default

ZNC now uses poll() unless it is disabled by ./configure --disable-poll. This
should get rid of the limit to FD_SETSIZE sockets (~1024).


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@2153 726aef4b-f618-498e-8847-2d620e286838

configure

@@ -648,6 +648,7 @@ enable_sasl
 enable_optimization
 enable_c_ares
 enable_run_from_source
+enable_poll
 with_module_prefix
 with_module_data_prefix
 enable_tcl
@@ -1303,6 +1304,7 @@ Optional Features:
   --disable-c-ares        disable c-ares usage
   --enable-run-from-source
                           znc will be runnable without installation
+  --disable-poll          use select() instead of poll()
   --enable-tcl            enable modtcl
 
 Optional Packages:
@@ -2960,6 +2962,13 @@ else
   RUNFROMSOURCE="no"
 fi
 
+# Check whether --enable-poll was given.
+if test "${enable_poll+set}" = set; then :
+  enableval=$enable_poll; POLL="$enableval"
+else
+  POLL="yes"
+fi
+
 
 if test "$DEBUG" != "no"; then
 	appendCXX -ggdb -D_DEBUG
@@ -2979,6 +2988,10 @@ if test "x$GXX" = "xyes"; then
 	appendCXX -Wall -W -Wno-unused-parameter -Woverloaded-virtual -Wshadow
 fi
 
+if test "$POLL" = "yes"; then
+	appendCXX -DCSOCK_USE_POLL
+fi
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for getopt_long in -lgnugetopt" >&5
 $as_echo_n "checking for getopt_long in -lgnugetopt... " >&6; }
 if test "${ac_cv_lib_gnugetopt_getopt_long+set}" = set; then :

configure.in

@@ -122,6 +122,10 @@ AC_ARG_ENABLE( [run-from-source],
 	fi
 	RUNFROMSOURCE="$enableval"],
 	[RUNFROMSOURCE="no"])
+AC_ARG_ENABLE( [poll],
+	AS_HELP_STRING([--disable-poll], [use select() instead of poll()]),
+	[POLL="$enableval"],
+	[POLL="yes"])
 
 if test "$DEBUG" != "no"; then
 	appendCXX -ggdb -D_DEBUG
@@ -141,6 +145,10 @@ if test "x$GXX" = "xyes"; then
 	appendCXX -Wall -W -Wno-unused-parameter -Woverloaded-virtual -Wshadow
 fi
 
+if test "$POLL" = "yes"; then
+	appendCXX -DCSOCK_USE_POLL
+fi
+
 AC_CHECK_LIB( gnugetopt, getopt_long,)
 AC_CHECK_FUNC([lstat], [appendCXX -DHAVE_LSTAT])
 PKG_PROG_PKG_CONFIG()