sys-devel/automake: make mdate output stable #520818 #574492

1 files changed, 53 insertions, 0 deletions

diff --git a/sys-devel/automake/files/automake-1.15-mdate-tz.patch b/sys-devel/automake/files/automake-1.15-mdate-tz.patch
new file mode 100644
index 000000000000..e00f2bf329d1
--- /dev/null
+++ b/sys-devel/automake/files/automake-1.15-mdate-tz.patch
@@ -0,0 +1,53 @@
+https://bugs.gentoo.org/520818
+https://bugs.gentoo.org/574492
+https://lists.gnu.org/archive/html/bug-automake/2014-10/msg00003.html
+https://lists.gnu.org/archive/html/bug-automake/2014-10/msg00004.html
+
+https://debbugs.gnu.org/20314
+https://bugs.debian.org/782345
+https://lists.gnu.org/archive/html/automake-patches/2015-04/msg00000.html
+
+From: Reiner Herrmann <reiner@reiner-h.de>
+Date: Sat, 18 Jul 2015 14:10:35 -0400
+Subject: Make output of mdate-sh deterministic
+
+mdate-sh pretty-prints the modification time of a file.
+But it's output can vary depending on the timezone of
+the caller. Someone in timezone GMT-12 will get a different
+result (day) than someone in timezone GMT+12.
+
+As this output is also used to create/update stamp files,
+which influence the further build process, the build result
+can vary.
+To enable reproducible builds and to have a more deterministic
+build behavior, this change fixes the timezone to UTC.
+
+Signed-off-by: Reiner Herrmann <reiner at reiner-h.de>
+---
+ lib/mdate-sh | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/lib/mdate-sh b/lib/mdate-sh
+index e8dfaca..9e2c0c9 100755
+--- a/lib/mdate-sh
++++ b/lib/mdate-sh
+@@ -1,7 +1,7 @@
+ #!/bin/sh
+ # Get modification time of a file or directory and pretty-print it.
+ 
+-scriptversion=2010-08-21.06; # UTC
++scriptversion=2015-04-09.19; # UTC
+ 
+ # Copyright (C) 1995-2014 Free Software Foundation, Inc.
+ # written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, June 1995
+@@ -74,6 +74,10 @@ export LC_ALL
+ LC_TIME=C
+ export LC_TIME
+ 
++# Use UTC to get reproducible result
++TZ=UTC
++export TZ
++
+ # GNU ls changes its time format in response to the TIME_STYLE
+ # variable.  Since we cannot assume 'unset' works, revert this
+ # variable to its documented default.