File bpo36302-sort-module-sources.patch of Package python38

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File bpo36302-sort-module-sources.patch of Package python38 (Revision 4b38339dad8c47aeb4744ca963f0ef61)

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From ca04974425c84f306ddcebe88d6b31442e34e89d Mon Sep 17 00:00:00 2001
From: "Bernhard M. Wiedemann" <bwiedemann@suse.de>
Date: Mon, 5 Jun 2017 17:33:33 +0200
Subject: [PATCH] bpo-36302: Sort list of sources

when building packages (e.g. for openSUSE Linux)
(random) filesystem order of input files
influences ordering of functions in the output .so files.
Thus without the patch, builds (in disposable VMs) would usually differ.

Without this patch, all callers have to be patched individually
https://github.com/dugsong/libdnet/pull/42
https://github.com/sass/libsass-python/pull/212
https://github.com/tahoe-lafs/pycryptopp/pull/41
https://github.com/yt-project/yt/pull/2206
https://github.com/pyproj4/pyproj/pull/142
https://github.com/pytries/datrie/pull/49
https://github.com/Roche/pyreadstat/pull/37
but that is an infinite effort.

See https://reproducible-builds.org/ for why this matters.
---
 Lib/distutils/command/build_ext.py                             | 3 ++-
 .../next/Library/2019-03-21-19-23-46.bpo-36302.Yc591g.rst      | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2019-03-21-19-23-46.bpo-36302.Yc591g.rst

diff --git a/Lib/distutils/command/build_ext.py b/Lib/distutils/command/build_ext.py
index 2d7cdf063f01..38bb8fd93c27 100644
--- a/Lib/distutils/command/build_ext.py
+++ b/Lib/distutils/command/build_ext.py
@@ -490,7 +490,8 @@ def build_extension(self, ext):
                   "in 'ext_modules' option (extension '%s'), "
                   "'sources' must be present and must be "
                   "a list of source filenames" % ext.name)
-        sources = list(sources)
+        # sort to make the resulting .so file build reproducible
+        sources = sorted(sources)
 
         ext_path = self.get_ext_fullpath(ext.name)
         depends = sources + ext.depends
diff --git a/Misc/NEWS.d/next/Library/2019-03-21-19-23-46.bpo-36302.Yc591g.rst b/Misc/NEWS.d/next/Library/2019-03-21-19-23-46.bpo-36302.Yc591g.rst
new file mode 100644
index 000000000000..fe01b5915d5d
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-03-21-19-23-46.bpo-36302.Yc591g.rst
@@ -0,0 +1,2 @@
+distutils sorts source file lists so that Extension .so files
+build more reproducibly by default

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File bpo36302-sort-module-sources.patch of Package python38 (Revision 4b38339dad8c47aeb4744ca963f0ef61)

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