mirror of https://github.com/python/cpython.git
100 lines
3.3 KiB
Python
100 lines
3.3 KiB
Python
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"""Shared AIX support functions."""
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import sys
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from sysconfig import get_config_var
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# subprocess is not necessarily available early in the build process
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# if not available, the config_vars are also definitely not available
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# supply substitutes to bootstrap the build
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try:
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import subprocess
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_have_subprocess = True
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_tmp_bd = get_config_var("AIX_BUILDDATE")
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_bgt = get_config_var("BUILD_GNU_TYPE")
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except ImportError: # pragma: no cover
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_have_subprocess = False
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_tmp_bd = None
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_bgt = "powerpc-ibm-aix6.1.7.0"
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# if get_config_var("AIX_BUILDDATE") was unknown, provide a substitute,
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# impossible builddate to specify 'unknown'
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_MISSING_BD = 9898
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try:
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_bd = int(_tmp_bd)
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except TypeError:
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_bd = _MISSING_BD
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# Infer the ABI bitwidth from maxsize (assuming 64 bit as the default)
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_sz = 32 if sys.maxsize == (2**31-1) else 64
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def _aix_tag(vrtl, bd):
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# type: (List[int], int) -> str
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# vrtl[version, release, technology_level]
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return "aix-{:1x}{:1d}{:02d}-{:04d}-{}".format(vrtl[0], vrtl[1], vrtl[2], bd, _sz)
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# extract version, release and technology level from a VRMF string
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def _aix_vrtl(vrmf):
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# type: (str) -> List[int]
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v, r, tl = vrmf.split(".")[:3]
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return [int(v[-1]), int(r), int(tl)]
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def _aix_bosmp64():
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# type: () -> Tuple[str, int]
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"""
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Return a Tuple[str, int] e.g., ['7.1.4.34', 1806]
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The fileset bos.mp64 is the AIX kernel. It's VRMF and builddate
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reflect the current ABI levels of the runtime environment.
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"""
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if _have_subprocess:
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# We expect all AIX systems to have lslpp installed in this location
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out = subprocess.check_output(["/usr/bin/lslpp", "-Lqc", "bos.mp64"])
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out = out.decode("utf-8").strip().split(":") # type: ignore
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# Use str() and int() to help mypy see types
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return str(out[2]), int(out[-1])
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else:
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from os import uname
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osname, host, release, version, machine = uname()
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return "{}.{}.0.0".format(version, release), _MISSING_BD
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def aix_platform():
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# type: () -> str
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"""
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AIX filesets are identified by four decimal values: V.R.M.F.
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V (version) and R (release) can be retreived using ``uname``
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Since 2007, starting with AIX 5.3 TL7, the M value has been
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included with the fileset bos.mp64 and represents the Technology
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Level (TL) of AIX. The F (Fix) value also increases, but is not
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relevant for comparing releases and binary compatibility.
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For binary compatibility the so-called builddate is needed.
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Again, the builddate of an AIX release is associated with bos.mp64.
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AIX ABI compatibility is described as guaranteed at: https://www.ibm.com/\
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support/knowledgecenter/en/ssw_aix_72/install/binary_compatability.html
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For pep425 purposes the AIX platform tag becomes:
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"aix-{:1x}{:1d}{:02d}-{:04d}-{}".format(v, r, tl, builddate, bitsize)
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e.g., "aix-6107-1415-32" for AIX 6.1 TL7 bd 1415, 32-bit
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and, "aix-6107-1415-64" for AIX 6.1 TL7 bd 1415, 64-bit
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"""
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vrmf, bd = _aix_bosmp64()
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return _aix_tag(_aix_vrtl(vrmf), bd)
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# extract vrtl from the BUILD_GNU_TYPE as an int
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def _aix_bgt():
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# type: () -> List[int]
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assert _bgt
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return _aix_vrtl(vrmf=_bgt)
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def aix_buildtag():
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# type: () -> str
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"""
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Return the platform_tag of the system Python was built on.
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"""
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return _aix_tag(_aix_bgt(), _bd)
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