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Re: [PATCH v2 2/7] y2038: Introduce __ASSUME_64BIT_TIME define

* Joseph Myers:

> I'd expect the only effects of allowing for not having __NR_* would 
> generally be that the case where the syscalls are not assumed to be 
> available at runtime also has an #ifdef on the __NR_* macro, so that if 
> it's not defined it falls straight through into exactly the same fallback 
> code as if the syscall had failed with ENOSYS.

An alternative would be to ship all the system call constants in the
glibc source tree (and check that they match the installed kernel header
sources if available there).

Thanks,
Florian
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