Re: [kvm-unit-tests] powerpc: fix boot_rom.bin build

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On Fri, Mar 4, 2016 at 7:28 AM, Andrew Jones <drjones@xxxxxxxxxx> wrote:
> On Fri, Mar 04, 2016 at 11:31:53AM +0100, Andrew Jones wrote:
>> On Thu, Mar 03, 2016 at 12:55:29PM -0800, Peter Feiner wrote:
>> > My powerpc objcopy (version 2.23.52.20130305) did a seek() that
>> > bash process substitution couldn't handle! I've changed the
>> > Makefile to do things the old fashioned way.
>> >
>> > Signed-off-by: Peter Feiner <pfeiner@xxxxxxxxxx>
>> > ---
>> >  powerpc/Makefile.common | 3 ++-
>> >  1 file changed, 2 insertions(+), 1 deletion(-)
>> >
>> > diff --git a/powerpc/Makefile.common b/powerpc/Makefile.common
>> > index 424983e..7818c48 100644
>> > --- a/powerpc/Makefile.common
>> > +++ b/powerpc/Makefile.common
>> > @@ -48,7 +48,8 @@ FLATLIBS = $(libcflat) $(LIBFDT_archive)
>> >
>> >  $(TEST_DIR)/boot_rom.bin: $(TEST_DIR)/boot_rom.elf
>> >     dd if=/dev/zero of=$@ bs=256 count=1
>> > -   $(OBJCOPY) -O binary $^ >(cat - >>$@)
>> > +   $(OBJCOPY) -O binary $^ $@.suffix
>> > +   cat $@.suffix >> $@
>> >
>> >  $(TEST_DIR)/boot_rom.elf: CFLAGS = -mbig-endian
>> >  $(TEST_DIR)/boot_rom.elf: $(TEST_DIR)/boot_rom.o
>> > --
>> > 2.7.0.rc3.207.g0ac5344
>>
>> Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
>
> Actually, Unreviewed-by: drew
>
> This leaves boot_rom.bin.suffix laying around. We need rm -f $@.suffix
> too. And, why '.suffix'? How about '.tmp', or even use a tempfile?

.suffix because it's the end of the file.

I don't think tempfile is necessary because, in general, a Makefile
has first refusal on the files in a directory. If you create a
boot_rom.bin.suffix and make overwrites it, it's your problem!

I'll add the rm -f.
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