[Buildroot] [PATCH 26/34] reproducibility: cpio: avoid embedding file dates in archive

[Gilles Chanteperdrix]

---
 fs/cpio/cpio.mk | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/fs/cpio/cpio.mk b/fs/cpio/cpio.mk
index e82167e..07be2a8 100644
--- a/fs/cpio/cpio.mk
+++ b/fs/cpio/cpio.mk
@@ -27,8 +27,18 @@ endif # BR2_ROOTFS_DEVICE_CREATION_STATIC
 
 ROOTFS_CPIO_PRE_GEN_HOOKS += ROOTFS_CPIO_ADD_INIT
 
+ifeq ($(BR2_REPRODUCIBLE),y)
+define ROOTFS_CPIO_REPRODUCIBLE_TOUCH
+	find $(TARGET_DIR) -print0 | xargs -0 touch -h -d @$(SOURCE_DATE_EPOCH)
+endef
+else
+define ROOTFS_CPIO_REPRODUCIBLE_TOUCH
+	true
+endef
+endif
+
 define ROOTFS_CPIO_CMD
-	cd $(TARGET_DIR) && find . | cpio --quiet -o -H newc > $@
+	$(ROOTFS_CPIO_REPRODUCIBLE_TOUCH) && cd $(TARGET_DIR) && find . | cpio --quiet -o -H newc > $@
 endef
 
 $(BINARIES_DIR)/rootfs.cpio.uboot: $(BINARIES_DIR)/rootfs.cpio host-uboot-tools
-- 
2.7.4