From: Bernhard M. Wiedemann Date: Thu, 1 Aug 2019 13:18:03 +0000 (+0200) Subject: bpo-36302: Sort list of sources (GH-12341) X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0d30ae1a03102de07758650af9243fd31211325a;p=python bpo-36302: Sort list of sources (GH-12341) 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. --- diff --git a/Lib/distutils/command/build_ext.py b/Lib/distutils/command/build_ext.py index 2d7cdf063f..38bb8fd93c 100644 --- a/Lib/distutils/command/build_ext.py +++ b/Lib/distutils/command/build_ext.py @@ -490,7 +490,8 @@ class build_ext(Command): "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 0000000000..fe01b5915d --- /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