From: Alex Kiernan <alex.kiernan@gmail.com>
Date: Tue, 26 Jun 2018 12:08:56 +0000 (+0000)
Subject: kernel: Set SOURCE_DATE_EPOCH to kernel git timestamp if not set
X-Git-Tag: lucaceresoli/bug-15201-perf-libtraceevent-missing~17537
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2f0dd67a5a8d4269f5155004d532d8fa972b3223;p=thirdparty%2Fopenembedded%2Fopenembedded-core-contrib.git

kernel: Set SOURCE_DATE_EPOCH to kernel git timestamp if not set

If SOURCE_DATE_EPOCH is unset (in addition to the existing "0" behaviour)
parse out the top most commit timestamp from the kernel tree to use as the
timestamp.

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---

diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index 972ac52814e..3213b932bf3 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -288,7 +288,7 @@ kernel_do_compile() {
 	if [ "${BUILD_REPRODUCIBLE_BINARIES}" = "1" ]; then
 		# kernel sources do not use do_unpack, so SOURCE_DATE_EPOCH may not
 		# be set....
-		if [ "$SOURCE_DATE_EPOCH" = "0" ]; then
+		if [ "${SOURCE_DATE_EPOCH}" = "" -o "${SOURCE_DATE_EPOCH}" = "0" ]; then
 			olddir=`pwd`
 			cd ${S}
 			SOURCE_DATE_EPOCH=`git log  -1 --pretty=%ct`