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build system: improve portability by not relying on extraordinary dd options 

Change-Id: Ibc7fe38ae11e9d477f85fdcf760b27abc6013f94
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: http://review.coreboot.org/9791
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Patrick Georgi 2015-04-17 14:32:34 +02:00
parent 01368ed5ed
commit f21b657f27
1 changed files with 1 additions and 1 deletions
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2
Makefile.inc
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@ -560,7 +560,7 @@ $(obj)/coreboot.rom: $(obj)/coreboot.pre $(objcbfs)/ramstage.elf $(CBFSTOOL) $(c
@printf " CBFS $(subst $(obj)/,,$(@))\n"
# The full ROM may be larger than the CBFS part, so create an empty
# file (filled with \377 = 0xff) and copy the CBFS image over it.
tr '\000' '\377' < /dev/zero 2> /dev/null | dd of=$@.tmp bs=8192 iflag=fullblock count=$$(($(CONFIG_ROM_SIZE) / 8192)) 2> /dev/null
dd if=/dev/zero bs=$(CONFIG_ROM_SIZE) count=1 | tr '\000' '\377' > $@.tmp
dd if=$(obj)/coreboot.pre of=$@.tmp bs=8192 conv=notrunc 2> /dev/null
$(CBFSTOOL) $@.tmp add-stage -f $(objcbfs)/ramstage.elf -n $(CONFIG_CBFS_PREFIX)/ramstage -c $(CBFS_COMPRESS_FLAG)
ifeq ($(CONFIG_PAYLOAD_NONE),y)