kumquat-buildroot/fs/erofs/erofs.mk
Casey Reeves ac5ecaf868 fs/erofs: enable support for reproducible build
By default, mkfs.erofs will sue the current date to set some metadata
in the filesystem it generates, and will also use generate a random UUID
for that filesystem. This is not reproducible.

When BR2_REPRODUCIBLE is selected, set the filesystem timestamps to
$SOURCE_DATE_EPOCH, and the filesystem UUID to the nil uuid (as good
as any other arbitrary one).

Signed-off-by: Casey Reeves <casey@xogium.me>
[yann.morin.1998@free.fr:
  - one multi-line assignment, not two
  - slightly rephrase the commit log
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2023-01-16 21:45:15 +01:00

28 lines
702 B
Makefile

################################################################################
#
# Build the EROFS root filesystem image
#
################################################################################
ROOTFS_EROFS_DEPENDENCIES = host-erofs-utils
ifeq ($(BR2_TARGET_ROOTFS_EROFS_LZ4HC),y)
ROOTFS_EROFS_ARGS += -zlz4hc
endif
ifeq ($(BR2_REPRODUCIBLE),y)
ROOTFS_EROFS_ARGS += \
-T $(SOURCE_DATE_EPOCH) \
-U 00000000-0000-0000-0000-000000000000
endif
ifneq ($(BR2_TARGET_ROOTFS_EROFS_PCLUSTERSIZE),0)
ROOTFS_EROFS_ARGS += -C$(strip $(BR2_TARGET_ROOTFS_EROFS_PCLUSTERSIZE))
endif
define ROOTFS_EROFS_CMD
$(HOST_DIR)/bin/mkfs.erofs $(ROOTFS_EROFS_ARGS) $@ $(TARGET_DIR)
endef
$(eval $(rootfs))