Re: uname -m

[Roland McGrath]

The utsname.machine string is chosen in proc/host.c:initialize_version_info.
Mach's host_basic_info gives you integers for "CPU type" and "CPU subtype",
with constants defined in <mach/machine.h>.  Our file proc/cpu-types.c
gives string names to these, and we use "type-subtype" as the
utsname.machine string.  The meanings of the existing "subtype" values
differ amohng the different CPUs: some are actual chip variants, while some
refer to system IO architecture.  All those values were chosen a very long
time ago at CMU and don't necessarily mean a whole lot useful now.
It would be fine to change how we decide what to put in utsname.machine.