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cpython: have powerpc64le use "ppc64le" to follow PEP600

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The PEP600 standard gives Python's naming scheme for various
architectures; it follows the convention which was in use by Fedora in
2014.  According to PEP600, the architecture name for Power PC is
`ppc64le`, not `powerpc64le`.  This is also how python3 declares its
"supported wheels" under Debian on PowerPC, as checked with `pip debug
--verbose`

  $ pip debug --verbose | grep powerpc
  $ pip debug --verbose | grep ppc | head
  cp39-cp39-manylinux_2_31_ppc64le
  cp39-cp39-manylinux_2_30_ppc64le
  cp39-cp39-manylinux_2_29_ppc64le
  cp39-cp39-manylinux_2_28_ppc64le
  cp39-cp39-manylinux_2_27_ppc64le
  cp39-cp39-manylinux_2_26_ppc64le
  cp39-cp39-manylinux_2_25_ppc64le
  cp39-cp39-manylinux_2_24_ppc64le
  cp39-cp39-manylinux_2_23_ppc64le

Let's adjust the `pythonHostPlatform` expression in
cpython/default.nix to pass the architecture using the naming scheme
Python expects.

Verified on a Raptor Computing Systems Talos II.  Without this commit,
PyQt5 fails to build, failing with "unsupported wheel".  With this
commit, it builds successfully.
This commit is contained in:
Adam Joseph 2022-04-09 18:35:50 -07:00 committed by Frederik Rietdijk
parent d83c9aaf15
commit b21933faab
1 changed files with 13 additions and 1 deletions
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14
pkgs/development/interpreters/python/cpython/default.nix
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@ -144,7 +144,19 @@ let
# The configure script uses "arm" as the CPU name for all 32-bit ARM
# variants when cross-compiling, but native builds include the version
# suffix, so we do the same.
pythonHostPlatform = "${parsed.kernel.name}-${parsed.cpu.name}";
pythonHostPlatform = let
cpu = {
# According to PEP600, Python's name for the Power PC
# architecture is "ppc", not "powerpc". Without the Rosetta
# Stone below, the PEP600 requirement that "${ARCH} matches
# the return value from distutils.util.get_platform()" fails.
# https://peps.python.org/pep-0600/
powerpc = "ppc";
powerpcle = "ppcle";
powerpc64 = "ppc64";
powerpc64le = "ppc64le";
}.${parsed.cpu.name} or parsed.cpu.name;
in "${parsed.kernel.name}-${cpu}";
# https://github.com/python/cpython/blob/e488e300f5c01289c10906c2e53a8e43d6de32d8/configure.ac#L724
multiarchCpu =