-AC_CHECK_FUNCS(clock_gettime,
- [],
- AC_CHECK_LIB(rt, clock_gettime,
- [clock_gettime_needs_rt="yes"],
- AC_CHECK_LIB(posix4, clock_gettime,
- [clock_gettime_needs_posix4="yes"],
- AC_MSG_ERROR(cannot find clock_gettime))))
+have_clock_gettime="no"
+AC_CHECK_FUNCS(clock_gettime, [have_clock_gettime="yes"])
+if test "x$have_clock_gettime" = "xno"
+then
+ AC_CHECK_LIB(rt, clock_gettime, [clock_gettime_needs_rt="yes"
+ have_clock_gettime="yes"])
+fi
+if test "x$have_clock_gettime" = "xno"
+then
+ AC_CHECK_LIB(posix4, clock_gettime, [clock_gettime_needs_posix4="yes"
+ have_clock_gettime="yes"])
+fi
+if test "x$have_clock_gettime" = "xyes"
+then
+ AC_DEFINE(HAVE_CLOCK_GETTIME, 1, [Define if the clock_gettime(2) function is available.])
+else
+ AC_MSG_WARN(cannot find clock_gettime)
+fi