From f5cab4828c9eb81eaaf3b0526ea4babb695e2290 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 17 Jan 2015 21:19:24 +0000 Subject: build: add image makefile helper function for pading with an offset Signed-off-by: Felix Fietkau SVN-Revision: 44012 --- include/image.mk | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include') diff --git a/include/image.mk b/include/image.mk index e64020132f..06feef5516 100644 --- a/include/image.mk +++ b/include/image.mk @@ -307,6 +307,17 @@ define Build/pad-rootfs $(call prepare_generic_squashfs,$@) endef +define Build/pad-offset + let \ + size="$$(stat -c%s $@)" \ + pad="$(word 1, $(1))" \ + offset="$(word 2, $(1))" \ + pad="(pad - ((size + offset) % pad)) % pad" \ + newsize='size + pad'; \ + dd if=$@ of=$@.new bs=$$newsize count=1 conv=sync + mv $@.new $@ +endef + define Build/check-size @[ $$(($(subst k,* 1024,$(subst m, * 1024k,$(1))))) -gt "$$(stat -c%s $@)" ] || { \ echo "WARNING: Image file $@ is too big"; \ -- cgit v1.2.3