RT-Thread/rt-thread — pull request #149 by grissiom (2013-08-29 12:48:44+00:00)
Title: add __rt_ffs prototype in rtthread.h

Note that we define __rt_ffs as __builtin_ffs in GCC. __builtin_ffs will
be inlined automatically.

Build passed with GCC/Keil in bsp/stm32f10x(RT_USING_CPU_FFS enabled).