Bug#896016: strace: please make the build reproducible

[Chris Lamb]

Source: strace
Version: 4.21-1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

Hi,

Whilst working on the Reproducible Builds effort [0], we noticed
that strace could not be built reproducibly as it encodes a
timezone-varying date in the manpage.

Patch attached that uses SOURCE_DATE_EPOCH [1].

  [0] https://reproducible-builds.org/
  [1] https://reproducible-builds.org/specs/source-date-epoch/


Best wishes,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
-------------- next part --------------
--- a/debian/patches/reproducible-build	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/reproducible-build	2018-04-18 18:48:03.072934833 +0100
@@ -0,0 +1,24 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby at debian.org>
+Last-Update: 2018-04-18
+
+--- strace-4.21.orig/file-date-gen
++++ strace-4.21/file-date-gen
+@@ -20,6 +20,11 @@ date=
+ 
+ [ -f "${DATE_FILE}" ] && date="$(cat "${DATE_FILE}")"
+ 
++# Use SOURCE_DATE_EPOCH if it exists.
++# <https://reproducible-builds.org/specs/source-date-epoch/>
++[ -n "${SOURCE_DATE_EPOCH}" ] ||
++	date="@${SOURCE_DATE_EPOCH}"
++
+ [ -n "${date}" ] ||
+ 	date="$(git log -n 1 --format=format:%cD --no-patch "${FILE}")"
+ 
+@@ -32,4 +37,4 @@ date=
+ 	exit 1
+ }
+ 
+-exec printf "%s" $(date "+${DATE_FORMAT}" -d "${date}")
++exec printf "%s" $(date -u "+${DATE_FORMAT}" -d "${date}")
--- a/debian/patches/series	2018-04-18 18:43:14.655180095 +0100
--- b/debian/patches/series	2018-04-18 18:48:01.920928268 +0100
@@ -1 +1,2 @@
 no-arm-unaligned-access
+reproducible-build