[ptxdist] [PATCH v3 2/3] barebox: add support for reproducible build

["Baeuerle, Florian" <Florian.Baeuerle@allegion.com>]

Signed-off-by: Florian Bäuerle <florian.baeuerle@allegion.com>
---
 platforms/barebox.in | 3 +++
 rules/barebox.make   | 9 +++++++++
 2 files changed, 12 insertions(+)

diff --git a/platforms/barebox.in b/platforms/barebox.in
index 645366e93..46f3d8ced 100644
--- a/platforms/barebox.in
+++ b/platforms/barebox.in
@@ -113,4 +113,7 @@ config BAREBOX_NEEDS_HOST_LZOP
 	  lzop is used in order to compile lzop for your development
 	  host.
 
+	  This option is required to produce reproducible lzop-
+	  compressed barebox images.
+
 endif
diff --git a/rules/barebox.make b/rules/barebox.make
index 83a7126cc..080074f64 100644
--- a/rules/barebox.make
+++ b/rules/barebox.make
@@ -47,6 +47,15 @@ BAREBOX_WRAPPER_BLACKLIST := \
 BAREBOX_CONF_OPT := $(call barebox-opts, BAREBOX)
 BAREBOX_MAKE_OPT := $(BAREBOX_CONF_OPT)
 
+ifndef PTXCONF_SETUP_DISABLE_REPRODUCIBLE
+BAREBOX_MAKE_ENV := $(BAREBOX_MAKE_ENV) \
+	SOURCE_DATE_EPOCH="$(SOURCE_DATE_EPOCH)" \
+	KBUILD_BUILD_TIMESTAMP="$(shell date --utc --date @$(SOURCE_DATE_EPOCH))" \
+	KBUILD_BUILD_VERSION="0" \
+	KBUILD_BUILD_USER="ptxdist" \
+	KBUILD_BUILD_HOST="ptxdist"
+endif
+
 BAREBOX_TAGS_OPT := TAGS tags cscope
 
 ifdef PTXCONF_BAREBOX
-- 
2.19.2

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