The problem is that the timespec structures now how 7 32-bit values before
them, which causes them to be implicitly padded on the Alpha (because the
timespecs have an alignment of 64 bits). However, the alignment constraints
changed if _POSIX_SOURCE was defined (thus replacing the timespecs with
time_ts and longs). This had no effect on 32-bit architectures, but changed
the offsets of several stat structure members on the Alpha.
XXX The ABI has not changed; explicit padding is added in the _POSIX_SOURCE
XXX case, enabled by an #ifdef __alpha__. This should be changed if the
XXX stat(2) ABI is ever changed again (e.g. if we change time_t to 64 bits).
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