unset cached value - anbody has a better idea to express this?

diff --git a/libev.m4 b/libev.m4
index 39c28f46ebc6f28d608cfffc55c8dd4735bee6fb..322b659bead949672d3fe6abb8f7432b86cdfe73 100644 (file)
--- a/libev.m4
+++ b/libev.m4
@@ -9,6 +9,7 @@ AC_CHECK_FUNCS(inotify_init epoll_ctl kqueue port_create poll select)
 AC_CHECK_FUNC(clock_gettime, [], [ 
    if test -z "$LIBEV_M4_AVOID_LIBRT"; then
       AC_CHECK_LIB(rt, clock_gettime) 
+      unset ac_cv_func_clock_gettime
       AC_CHECK_FUNCS(clock_gettime)
    fi
 ])