Bug#889128: php7.2: please make the build reproducible

[Chris Lamb]

Source: php7.2
Version: 7.2.2-1
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 php7.2 could not be built reproducibly.

Whilst the timestamp uses SOURCE_DATE_EPOCH, it currently varies on
the timezone.

Patch attached.

 [0] https://reproducible-builds.org/


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
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diff --git a/configure.ac b/configure.ac
index 4aa1034..3727672 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1269,7 +1269,7 @@ EXTRA_LDFLAGS="$EXTRA_LDFLAGS $PHP_LDFLAGS"
 EXTRA_LDFLAGS_PROGRAM="$EXTRA_LDFLAGS_PROGRAM $PHP_LDFLAGS"
 
 # SOURCE_DATE_EPOCH for reproducible builds https://reproducible-builds.org/specs/source-date-epoch/
-PHP_BUILD_DATE=`date --date="@${SOURCE_DATE_EPOCH:-$(date +%s)}" +%Y-%m-%d`
+PHP_BUILD_DATE=`date --utc --date="@${SOURCE_DATE_EPOCH:-$(date +%s)}" +%Y-%m-%d`
 AC_DEFINE_UNQUOTED(PHP_BUILD_DATE,"$PHP_BUILD_DATE",[PHP build date])
 
 PHP_UNAME=`uname -a | xargs`