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Return a Tuple[str, int] e.g., ['7.1.4.34', 1806]
The fileset bos.mp64 is the AIX kernel. It's VRMF and builddate
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AIX filesets are identified by four decimal values: V.R.M.F.
V (version) and R (release) can be retreived using ``uname``
Since 2007, starting with AIX 5.3 TL7, the M value has been
included with the fileset bos.mp64 and represents the Technology
Level (TL) of AIX. The F (Fix) value also increases, but is not
relevant for comparing releases and binary compatibility.
For binary compatibility the so-called builddate is needed.
Again, the builddate of an AIX release is associated with bos.mp64.
AIX ABI compatibility is described as guaranteed at: https://www.ibm.com/ support/knowledgecenter/en/ssw_aix_72/install/binary_compatability.html
For pep425 purposes the AIX platform tag becomes:
"aix-{:1x}{:1d}{:02d}-{:04d}-{}".format(v, r, tl, builddate, bitsize)
e.g., "aix-6107-1415-32" for AIX 6.1 TL7 bd 1415, 32-bit
and, "aix-6107-1415-64" for AIX 6.1 TL7 bd 1415, 64-bit
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