clf 0.2.1

flush the cpu cache line by __builtin_clear_cache()
Documentation 
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// for gcc
// extern void __builtin___clear_cache (void *begin, void *end);
// for clang
// extern void __builtin___clear_cache (char *begin, char *end);

void clf_fallback_clear_cache(unsigned char *begin, unsigned char *end)
{
    // NOTHING TODO
}