__glibc_unlikely  512 lib/cdefs.h    # define __glibc_unlikely(cond)	__builtin_expect ((cond), 0)
__glibc_unlikely  515 lib/cdefs.h    # define __glibc_unlikely(cond)	(cond)
__glibc_unlikely  162 lib/libc-config.h # undef __glibc_unlikely