Depends-on:
poll-h
-alloca
-select
-sys_select
-sys_time
-errno
+alloca [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1]
+select [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1]
+sys_select [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1]
+sys_time [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1]
+errno [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1]
configure.ac:
gl_FUNC_POLL