see http://mbed.org/users/no2chem/notebook/mbed-clock-control--benchmarks/

Dependencies:   mbed

Revision:
0:b5d3bd64d2dc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Jan 24 15:46:26 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/49a220cc26e0