--- libev/libev.m4	2008/04/06 09:53:19	1.10
+++ libev/libev.m4	2008/11/20 00:35:10	1.11
@@ -7,7 +7,19 @@
 AC_CHECK_FUNCS(inotify_init epoll_ctl kqueue port_create poll select eventfd)
  
 AC_CHECK_FUNC(clock_gettime, [], [ 
-   if test -z "$LIBEV_M4_AVOID_LIBRT"; then
+   dnl on linux, try syscall wrapper first
+   if test $(uname) = Linux; then
+      AC_MSG_CHECKING(for clock_gettime syscall)
+      AC_LINK_IFELSE([AC_LANG_PROGRAM(
+                      [#include <syscall.h>
+                       #include <time.h>],
+                      [struct timespec ts; int status = syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts)])],
+                     [ac_have_clock_syscall=1
+                      AC_DEFINE(HAVE_CLOCK_SYSCALL, 1, "use syscall interface for clock_gettime")
+                      AC_MSG_RESULT(yes)],
+                     [AC_MSG_RESULT(no)])
+   fi
+   if test -z "$LIBEV_M4_AVOID_LIBRT" && test -z "$ac_have_clock_syscall"; then
       AC_CHECK_LIB(rt, clock_gettime) 
       unset ac_cv_func_clock_gettime
       AC_CHECK_FUNCS(clock_gettime)