[AS_HELP_STRING([--disable-dtrace],
[Build with support for the DTRACE. @<:@default=on@:>@])],
[ac_cv_enable_dtrace="$enableval"],
- [ac_cv_enable_dtrace="no"])
+ [ac_cv_enable_dtrace="yes"])
AS_IF([test "$ac_cv_enable_dtrace" = "yes"],[
AC_CHECK_PROGS([DTRACE], [dtrace])