linux/Documentation/EDID/Makefile
Christoph Niedermaier 8bed5a5cfc Docs/EDID: Calculate CRC while building the code
The previous version made it necessary to first generate an
EDID data set without correct CRC and then to fix the CRC in
a second step. This patch adds the CRC calculation to the
makefile in such a way that a correct EDID data set is generated
in a single build step. Successfully tested with all existing
and a couple of new data sets.

Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.de>
Reviewed-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2018-11-06 07:36:22 -07:00

38 lines
707 B
Makefile

SOURCES := $(wildcard [0-9]*x[0-9]*.S)
BIN := $(patsubst %.S, %.bin, $(SOURCES))
IHEX := $(patsubst %.S, %.bin.ihex, $(SOURCES))
CODE := $(patsubst %.S, %.c, $(SOURCES))
all: $(BIN) $(IHEX) $(CODE)
clean:
@rm -f *.o *.bin.ihex *.bin *.c
%.o: %.S
@cc -c $^
%.bin.nocrc: %.o
@objcopy -Obinary $^ $@
%.crc: %.bin.nocrc
@list=$$(for i in `seq 1 127`; do head -c$$i $^ | tail -c1 \
| hexdump -v -e '/1 "%02X+"'; done); \
echo "ibase=16;100-($${list%?})%100" | bc >$@
%.p: %.crc %.S
@cc -c -DCRC="$$(cat $*.crc)" -o $@ $*.S
%.bin: %.p
@objcopy -Obinary $^ $@
%.bin.ihex: %.p
@objcopy -Oihex $^ $@
@dos2unix $@ 2>/dev/null
%.c: %.bin
@echo "{" >$@; hexdump -f hex $^ >>$@; echo "};" >>$@