+
+x_io_backend=select\(\)
+AC_ARG_WITH(poll,
+ [ --without-poll disable poll support (autodetected by default)],
+ [ if test "$withval" != "no"; then
+ if test "$withval" != "yes"; then
+ CFLAGS="-I$withval/include $CFLAGS"
+ CPPFLAGS="-I$withval/include $CPPFLAGS"
+ LDFLAGS="-L$withval/lib $LDFLAGS"
+ fi
+ AC_CHECK_FUNCS(poll, x_io_backend=poll\(\),
+ AC_MSG_ERROR([Can't enable poll support!])
+ )
+ fi
+ ],
+ [
+ AC_CHECK_FUNCS(poll, x_io_backend=poll\(\))
+ ]
+)
+
+
+AC_ARG_WITH(devpoll,
+ [ --without-devpoll disable /dev/poll support (autodetected by default)],
+ [ if test "$withval" != "no"; then
+ if test "$withval" != "yes"; then
+ CFLAGS="-I$withval/include $CFLAGS"
+ CPPFLAGS="-I$withval/include $CPPFLAGS"
+ LDFLAGS="-L$withval/lib $LDFLAGS"
+ fi
+
+ AC_CHECK_HEADERS(sys/devpoll.h,,AC_MSG_ERROR([required C header missing!]))
+ fi
+ ],
+ [
+ AC_CHECK_HEADERS(sys/devpoll.h,x_io_backend=/dev/poll,)
+ ]
+)
+
+AC_ARG_WITH(epoll,
+ [ --without-epoll disable epoll support (autodetected by default)],
+ [ if test "$withval" != "no"; then
+ if test "$withval" != "yes"; then
+ CFLAGS="-I$withval/include $CFLAGS"
+ CPPFLAGS="-I$withval/include $CPPFLAGS"
+ LDFLAGS="-L$withval/lib $LDFLAGS"
+ fi
+ AC_CHECK_FUNCS(epoll_create, x_io_backend=epoll\(\),
+ AC_MSG_ERROR([Can't enable epoll support!])
+ )
+ fi
+ ],
+ [
+ AC_CHECK_FUNCS(epoll_create, x_io_backend=epoll\(\))
+ ]
+)
+
+
+AC_ARG_WITH(kqueue,
+ [ --without-kqueue disable kqueue support (autodetected by default)],
+ [ if test "$withval" != "no"; then
+ if test "$withval" != "yes"; then
+ CFLAGS="-I$withval/include $CFLAGS"
+ CPPFLAGS="-I$withval/include $CPPFLAGS"
+ LDFLAGS="-L$withval/lib $LDFLAGS"
+ fi
+ AC_CHECK_FUNCS(kqueue, x_io_backend=kqueue\(\),
+ AC_MSG_ERROR([Can't enable kqueue support!])
+ )
+ fi
+ ],
+ [
+ AC_CHECK_FUNCS(kqueue, x_io_backend=kqueue\(\))
+ ]
+)
+
+