From 8a179fa02b50685fba47e7d19af922b07791d616 Mon Sep 17 00:00:00 2001
From: Jelle van der Waa <jelle@vdwaa.nl>
Date: Fri, 8 Dec 2017 19:19:22 +0100
Subject: [PATCH] Fix bug #69727: Support SOURCE_DATE_EPOCH for Build Date

When checking for reproducible builds php is build twice, once with the
current date and once with a date in the future. To keep the build date
supported and reproducible builds possible, SOURCE_DATE_EPOCH is
introduced which can be set to the same epoch value for both builds.
---
 NEWS         | 2 ++
 configure.in | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/NEWS b/NEWS
index e551dc785a1..c9906150107 100644
--- a/NEWS
+++ b/NEWS
@@ -19,6 +19,8 @@ PHP                                                                        NEWS
     (Daniel Ciochiu)
   . Fixed bug #75074 (php-process crash when is_file() is used with strings
     longer 260 chars). (Anatol)
+  . Fixed bug #69727 (Remove timestamps from build to make it reproducible).
+    (jelle van der Waa)
 
 - CLI Server:
   . Fixed bug #60471 (Random "Invalid request (unexpected EOF)" using a router
diff --git a/configure.in b/configure.in
index 7d78ca0ee09..40f44702ffa 100644
--- a/configure.in
+++ b/configure.in
@@ -1285,7 +1285,8 @@ fi
 EXTRA_LDFLAGS="$EXTRA_LDFLAGS $PHP_LDFLAGS"
 EXTRA_LDFLAGS_PROGRAM="$EXTRA_LDFLAGS_PROGRAM $PHP_LDFLAGS"
 
-PHP_BUILD_DATE=`date '+%Y-%m-%d'`
+# 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`
 AC_DEFINE_UNQUOTED(PHP_BUILD_DATE,"$PHP_BUILD_DATE",[PHP build date])
 
 case $host_alias in