Now that we've stopped trying to support 64bit OS X 10.5, the DTrace
problems there don't matter.
SHELL = /bin/sh
HaveDtrace = @HaveDtrace@
SHELL = /bin/sh
HaveDtrace = @HaveDtrace@
-# There are problems with dtrace on 64bit 10.5. For now at least, we
-# just turn dtrace off unless you override USE_DTRACE
-USE_DTRACE = NO
+USE_DTRACE = $(HaveDtrace)
DTRACE = @DtraceCmd@
LD = @LdCmd@
DTRACE = @DtraceCmd@
LD = @LdCmd@