Patch to add the TimerFD API to "cyclictest"

Hello,

Please find below a patch to enable the use of the TimerFD API to the cyclictest program.

It add the -F option for this, and can be used on either MONOTONIC and REALTIME clock, in absolute or relative time.

It has been tested on CentOS4 with a custom , 2.6.19-rt15 kernel and on a Debian Lenny with a -wireless-testing kernel (non-preempt-rt), so far. (The latest shown a strange behavior : in MONOTONIC / RELATIVE clocking, sometimes it happen that the minimum delay become negative. In my opinion, it would mean that the read() syscall returned *before* the required expiration delay - but it might just be a bug in my code. It does not appear on the preempt-rt kernel)

Please let me know if you see any obvious mistake. You may include this patch in the repository at will.

Bye,

obconseil

People in the embedded space don't do prototypes. They hack something until it
works, then it's done.
---
Always code as if the person who will maintain your code is a maniac serial
killer that knows where you live

index 911b05e..e9491dd 100644
@@ -1,7 +1,7 @@
 VERSION_STRING = 0.50
 
 TARGETS	= cyclictest signaltest classic_pi pi_stress hwlatdetect
-FLAGS	= -Wall -Wno-nonnull -O2
+FLAGS	= -Wall -Wno-nonnull -O2 -DWITH_TIMERFD
 LIBS 	= -lpthread -lrt
 DESTDIR	?=
 prefix  ?= /usr/local