From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Lumir Balhar <lbalhar@redhat.com>

Date: Tue, 4 Aug 2020 12:04:03 +0200

Subject: [PATCH] 00353: Original names for architectures with different names

 downstream

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https://fedoraproject.org/wiki/Changes/Python_Upstream_Architecture_Names

Pythons in RHEL/Fedora used different names for some architectures

than upstream and other distros (for example ppc64 vs. powerpc64).

This was patched in patch 274, now it is sedded if %with legacy_archnames.

That meant that an extension built with the default upstream settings

(on other distro or as an manylinux wheel) could not been found by Python

on RHEL/Fedora because it had a different suffix.

This patch adds the legacy names to importlib so Python is able

to import extensions with a legacy architecture name in its

file name.

It work both ways, so it support both %with and %without legacy_archnames.

WARNING: This patch has no effect on Python built with bootstrap

enabled because Python/importlib_external.h is not regenerated

and therefore Python during bootstrap contains importlib from

upstream without this feature. It's possible to include

Python/importlib_external.h to this patch but it'd make rebasing

a nightmare because it's basically a binary file.

Co-authored-by: Miro Hrončok <miro@hroncok.cz>

---

 Lib/importlib/_bootstrap_external.py | 40 ++++++++++++++++++++++++++--

 1 file changed, 38 insertions(+), 2 deletions(-)

diff --git a/Lib/importlib/_bootstrap_external.py b/Lib/importlib/_bootstrap_external.py

index 9feec50842..5bb2454a5c 100644

--- a/Lib/importlib/_bootstrap_external.py

+++ b/Lib/importlib/_bootstrap_external.py

@@ -1361,7 +1361,7 @@ def _get_supported_file_loaders():

     Each item is a tuple (loader, suffixes).

     """

-    extensions = ExtensionFileLoader, _imp.extension_suffixes()

+    extensions = ExtensionFileLoader, _alternative_architectures(_imp.extension_suffixes())

     source = SourceFileLoader, SOURCE_SUFFIXES

     bytecode = SourcelessFileLoader, BYTECODE_SUFFIXES

     return [extensions, source, bytecode]

@@ -1428,7 +1428,7 @@ def _setup(_bootstrap_module):

     # Constants

     setattr(self_module, '_relax_case', _make_relax_case())

-    EXTENSION_SUFFIXES.extend(_imp.extension_suffixes())

+    EXTENSION_SUFFIXES.extend(_alternative_architectures(_imp.extension_suffixes()))

     if builtin_os == 'nt':

         SOURCE_SUFFIXES.append('.pyw')

         if '_d.pyd' in EXTENSION_SUFFIXES:

@@ -1441,3 +1441,39 @@ def _install(_bootstrap_module):

     supported_loaders = _get_supported_file_loaders()

     sys.path_hooks.extend([FileFinder.path_hook(*supported_loaders)])

     sys.meta_path.append(PathFinder)

+

+

+_ARCH_MAP = {

+    "-arm-linux-gnueabi.": "-arm-linux-gnueabihf.",

+    "-armeb-linux-gnueabi.": "-armeb-linux-gnueabihf.",

+    "-mips64-linux-gnu.": "-mips64-linux-gnuabi64.",

+    "-mips64el-linux-gnu.": "-mips64el-linux-gnuabi64.",

+    "-ppc-linux-gnu.": "-powerpc-linux-gnu.",

+    "-ppc-linux-gnuspe.": "-powerpc-linux-gnuspe.",

+    "-ppc64-linux-gnu.": "-powerpc64-linux-gnu.",

+    "-ppc64le-linux-gnu.": "-powerpc64le-linux-gnu.",

+    # The above, but the other way around:

+    "-arm-linux-gnueabihf.": "-arm-linux-gnueabi.",

+    "-armeb-linux-gnueabihf.": "-armeb-linux-gnueabi.",

+    "-mips64-linux-gnuabi64.": "-mips64-linux-gnu.",

+    "-mips64el-linux-gnuabi64.": "-mips64el-linux-gnu.",

+    "-powerpc-linux-gnu.": "-ppc-linux-gnu.",

+    "-powerpc-linux-gnuspe.": "-ppc-linux-gnuspe.",

+    "-powerpc64-linux-gnu.": "-ppc64-linux-gnu.",

+    "-powerpc64le-linux-gnu.": "-ppc64le-linux-gnu.",

+}

+

+

+def _alternative_architectures(suffixes):

+    """Add a suffix with an alternative architecture name

+    to the list of suffixes so an extension built with

+    the default (upstream) setting is loadable with our Pythons

+    """

+

+    for suffix in suffixes:

+        for original, alternative in _ARCH_MAP.items():

+            if original in suffix:

+                suffixes.append(suffix.replace(original, alternative))

+                return suffixes

+

+    return suffixes